linux/arch/x86/kernel/e820.c

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/*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
* Low level x86 E820 memory map handling functions.
*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
* The firmware and bootloader passes us the "E820 table", which is the primary
* physical memory layout description available about x86 systems.
*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
* The kernel takes the E820 memory layout and optionally modifies it with
* quirks and other tweaks, and feeds that into the generic Linux memory
* allocation code routines via a platform independent interface (memblock, etc.).
*/
#include <linux/crash_dump.h>
#include <linux/bootmem.h>
#include <linux/suspend.h>
#include <linux/acpi.h>
#include <linux/firmware-map.h>
x86: Use memblock to replace early_res 1. replace find_e820_area with memblock_find_in_range 2. replace reserve_early with memblock_x86_reserve_range 3. replace free_early with memblock_x86_free_range. 4. NO_BOOTMEM will switch to use memblock too. 5. use _e820, _early wrap in the patch, in following patch, will replace them all 6. because memblock_x86_free_range support partial free, we can remove some special care 7. Need to make sure that memblock_find_in_range() is called after memblock_x86_fill() so adjust some calling later in setup.c::setup_arch() -- corruption_check and mptable_update -v2: Move reserve_brk() early Before fill_memblock_area, to avoid overlap between brk and memblock_find_in_range() that could happen We have more then 128 RAM entry in E820 tables, and memblock_x86_fill() could use memblock_find_in_range() to find a new place for memblock.memory.region array. and We don't need to use extend_brk() after fill_memblock_area() So move reserve_brk() early before fill_memblock_area(). -v3: Move find_smp_config early To make sure memblock_find_in_range not find wrong place, if BIOS doesn't put mptable in right place. -v4: Treat RESERVED_KERN as RAM in memblock.memory. and they are already in memblock.reserved already.. use __NOT_KEEP_MEMBLOCK to make sure memblock related code could be freed later. -v5: Generic version __memblock_find_in_range() is going from high to low, and for 32bit active_region for 32bit does include high pages need to replace the limit with memblock.default_alloc_limit, aka get_max_mapped() -v6: Use current_limit instead -v7: check with MEMBLOCK_ERROR instead of -1ULL or -1L -v8: Set memblock_can_resize early to handle EFI with more RAM entries -v9: update after kmemleak changes in mainline Suggested-by: David S. Miller <davem@davemloft.net> Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-08-25 20:39:17 +00:00
#include <linux/memblock.h>
#include <linux/sort.h>
#include <asm/e820/api.h>
#include <asm/setup.h>
/*
x86/boot/e820: Introduce the bootloader provided e820_table_firmware[] table Add the real e820_tabel_firmware[] that will not be modified by the kernel or the EFI boot stub under any circumstance. In addition to that modify the code so that e820_table_firmwarep[] is exposed via sysfs to represent the real firmware memory layout, rather than exposing the e820_table_kexec[] table. This fixes a hibernation bug/warning, which uses e820_table_kexec[] to check RAM layout consistency across hibernation/resume: The suspend kernel: [ 0.000000] e820: update [mem 0x76671018-0x76679457] usable ==> usable The resume kernel: [ 0.000000] e820: update [mem 0x7666f018-0x76677457] usable ==> usable ... [ 15.752088] PM: Using 3 thread(s) for decompression. [ 15.752088] PM: Loading and decompressing image data (471870 pages)... [ 15.764971] Hibernate inconsistent memory map detected! [ 15.770833] PM: Image mismatch: architecture specific data Actually it is safe to restore these pages because E820_TYPE_RAM and E820_TYPE_RESERVED_KERN are treated the same during hibernation, so the original e820 table provided by the bootloader is used for hibernation MD5 fingerprint checking. The side effect is that, this newly introduced variable might increase the kernel size at compile time. Suggested-by: Ingo Molnar <mingo@redhat.com> Signed-off-by: Chen Yu <yu.c.chen@intel.com> Cc: Dave Young <dyoung@redhat.com> Cc: Len Brown <lenb@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Xunlei Pang <xlpang@redhat.com> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-07-02 17:07:32 +00:00
* We organize the E820 table into three main data structures:
x86/boot/e820: Rename e820_table_saved to e820_table_firmware and improve the description So the 'e820_table_saved' is a bit of a misnomer that hides its real purpose. At first sight the name suggests that it's some sort save/restore mechanism, as this is how we typically name such facilities in the kernel. But that is not so, e820_table_saved is the original firmware version of the e820 table, not modified by the kernel. This table is displayed in the /sys/firmware/memmap file, and it's also used by the hibernation code to calculate a physical memory layout MD5 fingerprint checksum which is invariant of the kernel. So rename it to 'e820_table_firmware' and update all the comments to better describe the main e820 data strutures. Also rename: 'initial_e820_table_saved' => 'e820_table_firmware_init' 'e820_update_range_saved' => 'e820_update_range_firmware' ... to better match the new nomenclature. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 09:07:49 +00:00
*
x86/boot/e820: Introduce the bootloader provided e820_table_firmware[] table Add the real e820_tabel_firmware[] that will not be modified by the kernel or the EFI boot stub under any circumstance. In addition to that modify the code so that e820_table_firmwarep[] is exposed via sysfs to represent the real firmware memory layout, rather than exposing the e820_table_kexec[] table. This fixes a hibernation bug/warning, which uses e820_table_kexec[] to check RAM layout consistency across hibernation/resume: The suspend kernel: [ 0.000000] e820: update [mem 0x76671018-0x76679457] usable ==> usable The resume kernel: [ 0.000000] e820: update [mem 0x7666f018-0x76677457] usable ==> usable ... [ 15.752088] PM: Using 3 thread(s) for decompression. [ 15.752088] PM: Loading and decompressing image data (471870 pages)... [ 15.764971] Hibernate inconsistent memory map detected! [ 15.770833] PM: Image mismatch: architecture specific data Actually it is safe to restore these pages because E820_TYPE_RAM and E820_TYPE_RESERVED_KERN are treated the same during hibernation, so the original e820 table provided by the bootloader is used for hibernation MD5 fingerprint checking. The side effect is that, this newly introduced variable might increase the kernel size at compile time. Suggested-by: Ingo Molnar <mingo@redhat.com> Signed-off-by: Chen Yu <yu.c.chen@intel.com> Cc: Dave Young <dyoung@redhat.com> Cc: Len Brown <lenb@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Xunlei Pang <xlpang@redhat.com> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-07-02 17:07:32 +00:00
* - 'e820_table_firmware': the original firmware version passed to us by the
* bootloader - not modified by the kernel. It is composed of two parts:
* the first 128 E820 memory entries in boot_params.e820_table and the remaining
* (if any) entries of the SETUP_E820_EXT nodes. We use this to:
x86/boot/e820: Rename e820_table_saved to e820_table_firmware and improve the description So the 'e820_table_saved' is a bit of a misnomer that hides its real purpose. At first sight the name suggests that it's some sort save/restore mechanism, as this is how we typically name such facilities in the kernel. But that is not so, e820_table_saved is the original firmware version of the e820 table, not modified by the kernel. This table is displayed in the /sys/firmware/memmap file, and it's also used by the hibernation code to calculate a physical memory layout MD5 fingerprint checksum which is invariant of the kernel. So rename it to 'e820_table_firmware' and update all the comments to better describe the main e820 data strutures. Also rename: 'initial_e820_table_saved' => 'e820_table_firmware_init' 'e820_update_range_saved' => 'e820_update_range_firmware' ... to better match the new nomenclature. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 09:07:49 +00:00
*
* - inform the user about the firmware's notion of memory layout
* via /sys/firmware/memmap
*
* - the hibernation code uses it to generate a kernel-independent MD5
* fingerprint of the physical memory layout of a system.
*
x86/boot/e820: Introduce the bootloader provided e820_table_firmware[] table Add the real e820_tabel_firmware[] that will not be modified by the kernel or the EFI boot stub under any circumstance. In addition to that modify the code so that e820_table_firmwarep[] is exposed via sysfs to represent the real firmware memory layout, rather than exposing the e820_table_kexec[] table. This fixes a hibernation bug/warning, which uses e820_table_kexec[] to check RAM layout consistency across hibernation/resume: The suspend kernel: [ 0.000000] e820: update [mem 0x76671018-0x76679457] usable ==> usable The resume kernel: [ 0.000000] e820: update [mem 0x7666f018-0x76677457] usable ==> usable ... [ 15.752088] PM: Using 3 thread(s) for decompression. [ 15.752088] PM: Loading and decompressing image data (471870 pages)... [ 15.764971] Hibernate inconsistent memory map detected! [ 15.770833] PM: Image mismatch: architecture specific data Actually it is safe to restore these pages because E820_TYPE_RAM and E820_TYPE_RESERVED_KERN are treated the same during hibernation, so the original e820 table provided by the bootloader is used for hibernation MD5 fingerprint checking. The side effect is that, this newly introduced variable might increase the kernel size at compile time. Suggested-by: Ingo Molnar <mingo@redhat.com> Signed-off-by: Chen Yu <yu.c.chen@intel.com> Cc: Dave Young <dyoung@redhat.com> Cc: Len Brown <lenb@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Xunlei Pang <xlpang@redhat.com> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-07-02 17:07:32 +00:00
* - 'e820_table_kexec': a slightly modified (by the kernel) firmware version
* passed to us by the bootloader - the major difference between
* e820_table_firmware[] and this one is that, the latter marks the setup_data
* list created by the EFI boot stub as reserved, so that kexec can reuse the
* setup_data information in the second kernel. Besides, e820_table_kexec[]
* might also be modified by the kexec itself to fake a mptable.
* We use this to:
*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
* - kexec, which is a bootloader in disguise, uses the original E820
x86/boot/e820: Rename e820_table_saved to e820_table_firmware and improve the description So the 'e820_table_saved' is a bit of a misnomer that hides its real purpose. At first sight the name suggests that it's some sort save/restore mechanism, as this is how we typically name such facilities in the kernel. But that is not so, e820_table_saved is the original firmware version of the e820 table, not modified by the kernel. This table is displayed in the /sys/firmware/memmap file, and it's also used by the hibernation code to calculate a physical memory layout MD5 fingerprint checksum which is invariant of the kernel. So rename it to 'e820_table_firmware' and update all the comments to better describe the main e820 data strutures. Also rename: 'initial_e820_table_saved' => 'e820_table_firmware_init' 'e820_update_range_saved' => 'e820_update_range_firmware' ... to better match the new nomenclature. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 09:07:49 +00:00
* layout to pass to the kexec-ed kernel. This way the original kernel
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
* can have a restricted E820 map while the kexec()-ed kexec-kernel
x86/boot/e820: Rename e820_table_saved to e820_table_firmware and improve the description So the 'e820_table_saved' is a bit of a misnomer that hides its real purpose. At first sight the name suggests that it's some sort save/restore mechanism, as this is how we typically name such facilities in the kernel. But that is not so, e820_table_saved is the original firmware version of the e820 table, not modified by the kernel. This table is displayed in the /sys/firmware/memmap file, and it's also used by the hibernation code to calculate a physical memory layout MD5 fingerprint checksum which is invariant of the kernel. So rename it to 'e820_table_firmware' and update all the comments to better describe the main e820 data strutures. Also rename: 'initial_e820_table_saved' => 'e820_table_firmware_init' 'e820_update_range_saved' => 'e820_update_range_firmware' ... to better match the new nomenclature. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 09:07:49 +00:00
* can have access to full memory - etc.
*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
* - 'e820_table': this is the main E820 table that is massaged by the
x86/boot/e820: Rename e820_table_saved to e820_table_firmware and improve the description So the 'e820_table_saved' is a bit of a misnomer that hides its real purpose. At first sight the name suggests that it's some sort save/restore mechanism, as this is how we typically name such facilities in the kernel. But that is not so, e820_table_saved is the original firmware version of the e820 table, not modified by the kernel. This table is displayed in the /sys/firmware/memmap file, and it's also used by the hibernation code to calculate a physical memory layout MD5 fingerprint checksum which is invariant of the kernel. So rename it to 'e820_table_firmware' and update all the comments to better describe the main e820 data strutures. Also rename: 'initial_e820_table_saved' => 'e820_table_firmware_init' 'e820_update_range_saved' => 'e820_update_range_firmware' ... to better match the new nomenclature. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 09:07:49 +00:00
* low level x86 platform code, or modified by boot parameters, before
* passed on to higher level MM layers.
*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
* Once the E820 map has been converted to the standard Linux memory layout
x86/boot/e820: Rename e820_table_saved to e820_table_firmware and improve the description So the 'e820_table_saved' is a bit of a misnomer that hides its real purpose. At first sight the name suggests that it's some sort save/restore mechanism, as this is how we typically name such facilities in the kernel. But that is not so, e820_table_saved is the original firmware version of the e820 table, not modified by the kernel. This table is displayed in the /sys/firmware/memmap file, and it's also used by the hibernation code to calculate a physical memory layout MD5 fingerprint checksum which is invariant of the kernel. So rename it to 'e820_table_firmware' and update all the comments to better describe the main e820 data strutures. Also rename: 'initial_e820_table_saved' => 'e820_table_firmware_init' 'e820_update_range_saved' => 'e820_update_range_firmware' ... to better match the new nomenclature. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 09:07:49 +00:00
* information its role stops - modifying it has no effect and does not get
* re-propagated. So itsmain role is a temporary bootstrap storage of firmware
* specific memory layout data during early bootup.
*/
x86/boot/e820: Rename e820_table_saved to e820_table_firmware and improve the description So the 'e820_table_saved' is a bit of a misnomer that hides its real purpose. At first sight the name suggests that it's some sort save/restore mechanism, as this is how we typically name such facilities in the kernel. But that is not so, e820_table_saved is the original firmware version of the e820 table, not modified by the kernel. This table is displayed in the /sys/firmware/memmap file, and it's also used by the hibernation code to calculate a physical memory layout MD5 fingerprint checksum which is invariant of the kernel. So rename it to 'e820_table_firmware' and update all the comments to better describe the main e820 data strutures. Also rename: 'initial_e820_table_saved' => 'e820_table_firmware_init' 'e820_update_range_saved' => 'e820_update_range_firmware' ... to better match the new nomenclature. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 09:07:49 +00:00
static struct e820_table e820_table_init __initdata;
static struct e820_table e820_table_kexec_init __initdata;
x86/boot/e820: Introduce the bootloader provided e820_table_firmware[] table Add the real e820_tabel_firmware[] that will not be modified by the kernel or the EFI boot stub under any circumstance. In addition to that modify the code so that e820_table_firmwarep[] is exposed via sysfs to represent the real firmware memory layout, rather than exposing the e820_table_kexec[] table. This fixes a hibernation bug/warning, which uses e820_table_kexec[] to check RAM layout consistency across hibernation/resume: The suspend kernel: [ 0.000000] e820: update [mem 0x76671018-0x76679457] usable ==> usable The resume kernel: [ 0.000000] e820: update [mem 0x7666f018-0x76677457] usable ==> usable ... [ 15.752088] PM: Using 3 thread(s) for decompression. [ 15.752088] PM: Loading and decompressing image data (471870 pages)... [ 15.764971] Hibernate inconsistent memory map detected! [ 15.770833] PM: Image mismatch: architecture specific data Actually it is safe to restore these pages because E820_TYPE_RAM and E820_TYPE_RESERVED_KERN are treated the same during hibernation, so the original e820 table provided by the bootloader is used for hibernation MD5 fingerprint checking. The side effect is that, this newly introduced variable might increase the kernel size at compile time. Suggested-by: Ingo Molnar <mingo@redhat.com> Signed-off-by: Chen Yu <yu.c.chen@intel.com> Cc: Dave Young <dyoung@redhat.com> Cc: Len Brown <lenb@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Xunlei Pang <xlpang@redhat.com> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-07-02 17:07:32 +00:00
static struct e820_table e820_table_firmware_init __initdata;
x86/boot/e820: Rename e820_table_saved to e820_table_firmware and improve the description So the 'e820_table_saved' is a bit of a misnomer that hides its real purpose. At first sight the name suggests that it's some sort save/restore mechanism, as this is how we typically name such facilities in the kernel. But that is not so, e820_table_saved is the original firmware version of the e820 table, not modified by the kernel. This table is displayed in the /sys/firmware/memmap file, and it's also used by the hibernation code to calculate a physical memory layout MD5 fingerprint checksum which is invariant of the kernel. So rename it to 'e820_table_firmware' and update all the comments to better describe the main e820 data strutures. Also rename: 'initial_e820_table_saved' => 'e820_table_firmware_init' 'e820_update_range_saved' => 'e820_update_range_firmware' ... to better match the new nomenclature. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 09:07:49 +00:00
struct e820_table *e820_table __refdata = &e820_table_init;
struct e820_table *e820_table_kexec __refdata = &e820_table_kexec_init;
x86/boot/e820: Introduce the bootloader provided e820_table_firmware[] table Add the real e820_tabel_firmware[] that will not be modified by the kernel or the EFI boot stub under any circumstance. In addition to that modify the code so that e820_table_firmwarep[] is exposed via sysfs to represent the real firmware memory layout, rather than exposing the e820_table_kexec[] table. This fixes a hibernation bug/warning, which uses e820_table_kexec[] to check RAM layout consistency across hibernation/resume: The suspend kernel: [ 0.000000] e820: update [mem 0x76671018-0x76679457] usable ==> usable The resume kernel: [ 0.000000] e820: update [mem 0x7666f018-0x76677457] usable ==> usable ... [ 15.752088] PM: Using 3 thread(s) for decompression. [ 15.752088] PM: Loading and decompressing image data (471870 pages)... [ 15.764971] Hibernate inconsistent memory map detected! [ 15.770833] PM: Image mismatch: architecture specific data Actually it is safe to restore these pages because E820_TYPE_RAM and E820_TYPE_RESERVED_KERN are treated the same during hibernation, so the original e820 table provided by the bootloader is used for hibernation MD5 fingerprint checking. The side effect is that, this newly introduced variable might increase the kernel size at compile time. Suggested-by: Ingo Molnar <mingo@redhat.com> Signed-off-by: Chen Yu <yu.c.chen@intel.com> Cc: Dave Young <dyoung@redhat.com> Cc: Len Brown <lenb@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Xunlei Pang <xlpang@redhat.com> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-07-02 17:07:32 +00:00
struct e820_table *e820_table_firmware __refdata = &e820_table_firmware_init;
/* For PCI or other memory-mapped resources */
unsigned long pci_mem_start = 0xaeedbabe;
#ifdef CONFIG_PCI
EXPORT_SYMBOL(pci_mem_start);
#endif
/*
* This function checks if any part of the range <start,end> is mapped
* with type.
*/
bool e820__mapped_any(u64 start, u64 end, enum e820_type type)
{
int i;
for (i = 0; i < e820_table->nr_entries; i++) {
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
struct e820_entry *entry = &e820_table->entries[i];
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
if (type && entry->type != type)
continue;
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
if (entry->addr >= end || entry->addr + entry->size <= start)
continue;
return 1;
}
return 0;
}
EXPORT_SYMBOL_GPL(e820__mapped_any);
/*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
* This function checks if the entire <start,end> range is mapped with 'type'.
*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
* Note: this function only works correctly once the E820 table is sorted and
* not-overlapping (at least for the range specified), which is the case normally.
*/
static struct e820_entry *__e820__mapped_all(u64 start, u64 end,
enum e820_type type)
{
int i;
for (i = 0; i < e820_table->nr_entries; i++) {
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
struct e820_entry *entry = &e820_table->entries[i];
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
if (type && entry->type != type)
continue;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
/* Is the region (part) in overlap with the current region? */
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
if (entry->addr >= end || entry->addr + entry->size <= start)
continue;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
/*
* If the region is at the beginning of <start,end> we move
* 'start' to the end of the region since it's ok until there
*/
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
if (entry->addr <= start)
start = entry->addr + entry->size;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
/*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
* If 'start' is now at or beyond 'end', we're done, full
* coverage of the desired range exists:
*/
if (start >= end)
return entry;
}
return NULL;
}
/*
* This function checks if the entire range <start,end> is mapped with type.
*/
bool __init e820__mapped_all(u64 start, u64 end, enum e820_type type)
{
return __e820__mapped_all(start, end, type);
}
/*
* This function returns the type associated with the range <start,end>.
*/
int e820__get_entry_type(u64 start, u64 end)
{
struct e820_entry *entry = __e820__mapped_all(start, end, 0);
return entry ? entry->type : -EINVAL;
}
/*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
* Add a memory region to the kernel E820 map.
*/
static void __init __e820__range_add(struct e820_table *table, u64 start, u64 size, enum e820_type type)
{
int x = table->nr_entries;
if (x >= ARRAY_SIZE(table->entries)) {
pr_err("e820: too many entries; ignoring [mem %#010llx-%#010llx]\n", start, start + size - 1);
return;
}
table->entries[x].addr = start;
table->entries[x].size = size;
table->entries[x].type = type;
table->nr_entries++;
}
void __init e820__range_add(u64 start, u64 size, enum e820_type type)
{
x86/boot/e820: Create coherent API function names for E820 range operations We have these three related functions: extern void e820_add_region(u64 start, u64 size, int type); extern u64 e820_update_range(u64 start, u64 size, unsigned old_type, unsigned new_type); extern u64 e820_remove_range(u64 start, u64 size, unsigned old_type, int checktype); But it's not clear from the naming that they are 3 operations based around the same 'memory range' concept. Rename them to better signal this, and move the prototypes next to each other: extern void e820__range_add (u64 start, u64 size, int type); extern u64 e820__range_update(u64 start, u64 size, unsigned old_type, unsigned new_type); extern u64 e820__range_remove(u64 start, u64 size, unsigned old_type, int checktype); Note that this improved organization of the functions shows another problem that was easy to miss before: sometimes the E820 entry type is 'int', sometimes 'unsigned int' - but this will be fixed in a separate patch. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 13:19:36 +00:00
__e820__range_add(e820_table, start, size, type);
}
static void __init e820_print_type(enum e820_type type)
{
switch (type) {
case E820_TYPE_RAM: /* Fall through: */
case E820_TYPE_RESERVED_KERN: pr_cont("usable"); break;
case E820_TYPE_RESERVED: pr_cont("reserved"); break;
case E820_TYPE_ACPI: pr_cont("ACPI data"); break;
case E820_TYPE_NVS: pr_cont("ACPI NVS"); break;
case E820_TYPE_UNUSABLE: pr_cont("unusable"); break;
case E820_TYPE_PMEM: /* Fall through: */
case E820_TYPE_PRAM: pr_cont("persistent (type %u)", type); break;
default: pr_cont("type %u", type); break;
}
}
void __init e820__print_table(char *who)
{
int i;
for (i = 0; i < e820_table->nr_entries; i++) {
pr_info("%s: [mem %#018Lx-%#018Lx] ", who,
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
e820_table->entries[i].addr,
e820_table->entries[i].addr + e820_table->entries[i].size - 1);
e820_print_type(e820_table->entries[i].type);
pr_cont("\n");
}
}
/*
* Sanitize an E820 map.
*
* Some E820 layouts include overlapping entries. The following
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
* replaces the original E820 map with a new one, removing overlaps,
* and resolving conflicting memory types in favor of highest
* numbered type.
*
* The input parameter 'entries' points to an array of 'struct
* e820_entry' which on entry has elements in the range [0, *nr_entries)
* valid, and which has space for up to max_nr_entries entries.
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
* On return, the resulting sanitized E820 map entries will be in
* overwritten in the same location, starting at 'entries'.
*
* The integer pointed to by nr_entries must be valid on entry (the
* current number of valid entries located at 'entries'). If the
* sanitizing succeeds the *nr_entries will be updated with the new
* number of valid entries (something no more than max_nr_entries).
*
x86/boot/e820: Rename sanitize_e820_table() to e820__update_table() sanitize_e820_table() is a minor misnomer in that it suggests that the E820 table requires sanitizing - which implies that it will only do anything if the E820 table is irregular (not sane). That is wrong, because sanitize_e820_table() also does a very regular sorting of the E820 table, which is a necessity in the basic append-only flow of E820 updates the kernel is allowed to perform to it. So rename it to e820__update_table() to include that purpose as well. This also lines up all the table-update functions into a coherent naming family: int e820__update_table(struct e820_entry *biosmap, int max_nr_map, u32 *pnr_map); void e820__update_table_print(void); void e820__update_table_firmware(void); No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 13:09:20 +00:00
* The return value from e820__update_table() is zero if it
* successfully 'sanitized' the map entries passed in, and is -1
* if it did nothing, which can happen if either of (1) it was
* only passed one map entry, or (2) any of the input map entries
* were invalid (start + size < start, meaning that the size was
* so big the described memory range wrapped around through zero.)
*
* Visually we're performing the following
* (1,2,3,4 = memory types)...
*
* Sample memory map (w/overlaps):
* ____22__________________
* ______________________4_
* ____1111________________
* _44_____________________
* 11111111________________
* ____________________33__
* ___________44___________
* __________33333_________
* ______________22________
* ___________________2222_
* _________111111111______
* _____________________11_
* _________________4______
*
* Sanitized equivalent (no overlap):
* 1_______________________
* _44_____________________
* ___1____________________
* ____22__________________
* ______11________________
* _________1______________
* __________3_____________
* ___________44___________
* _____________33_________
* _______________2________
* ________________1_______
* _________________4______
* ___________________2____
* ____________________33__
* ______________________4_
*/
struct change_member {
/* Pointer to the original entry: */
struct e820_entry *entry;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
/* Address for this change point: */
unsigned long long addr;
};
static struct change_member change_point_list[2*E820_MAX_ENTRIES] __initdata;
static struct change_member *change_point[2*E820_MAX_ENTRIES] __initdata;
static struct e820_entry *overlap_list[E820_MAX_ENTRIES] __initdata;
static struct e820_entry new_entries[E820_MAX_ENTRIES] __initdata;
static int __init cpcompare(const void *a, const void *b)
{
struct change_member * const *app = a, * const *bpp = b;
const struct change_member *ap = *app, *bp = *bpp;
/*
* Inputs are pointers to two elements of change_point[]. If their
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
* addresses are not equal, their difference dominates. If the addresses
* are equal, then consider one that represents the end of its region
* to be greater than one that does not.
*/
if (ap->addr != bp->addr)
return ap->addr > bp->addr ? 1 : -1;
return (ap->addr != ap->entry->addr) - (bp->addr != bp->entry->addr);
}
int __init e820__update_table(struct e820_table *table)
{
struct e820_entry *entries = table->entries;
u32 max_nr_entries = ARRAY_SIZE(table->entries);
enum e820_type current_type, last_type;
unsigned long long last_addr;
u32 new_nr_entries, overlap_entries;
u32 i, chg_idx, chg_nr;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
/* If there's only one memory region, don't bother: */
if (table->nr_entries < 2)
return -1;
BUG_ON(table->nr_entries > max_nr_entries);
/* Bail out if we find any unreasonable addresses in the map: */
for (i = 0; i < table->nr_entries; i++) {
if (entries[i].addr + entries[i].size < entries[i].addr)
return -1;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
/* Create pointers for initial change-point information (for sorting): */
for (i = 0; i < 2 * table->nr_entries; i++)
change_point[i] = &change_point_list[i];
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
/*
* Record all known change-points (starting and ending addresses),
* omitting empty memory regions:
*/
chg_idx = 0;
for (i = 0; i < table->nr_entries; i++) {
if (entries[i].size != 0) {
change_point[chg_idx]->addr = entries[i].addr;
change_point[chg_idx++]->entry = &entries[i];
change_point[chg_idx]->addr = entries[i].addr + entries[i].size;
change_point[chg_idx++]->entry = &entries[i];
}
}
chg_nr = chg_idx;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
/* Sort change-point list by memory addresses (low -> high): */
sort(change_point, chg_nr, sizeof(*change_point), cpcompare, NULL);
/* Create a new memory map, removing overlaps: */
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
overlap_entries = 0; /* Number of entries in the overlap table */
new_nr_entries = 0; /* Index for creating new map entries */
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
last_type = 0; /* Start with undefined memory type */
last_addr = 0; /* Start with 0 as last starting address */
/* Loop through change-points, determining effect on the new map: */
for (chg_idx = 0; chg_idx < chg_nr; chg_idx++) {
/* Keep track of all overlapping entries */
if (change_point[chg_idx]->addr == change_point[chg_idx]->entry->addr) {
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
/* Add map entry to overlap list (> 1 entry implies an overlap) */
overlap_list[overlap_entries++] = change_point[chg_idx]->entry;
} else {
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
/* Remove entry from list (order independent, so swap with last): */
for (i = 0; i < overlap_entries; i++) {
if (overlap_list[i] == change_point[chg_idx]->entry)
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
overlap_list[i] = overlap_list[overlap_entries-1];
}
overlap_entries--;
}
/*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
* If there are overlapping entries, decide which
* "type" to use (larger value takes precedence --
* 1=usable, 2,3,4,4+=unusable)
*/
current_type = 0;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
for (i = 0; i < overlap_entries; i++) {
if (overlap_list[i]->type > current_type)
current_type = overlap_list[i]->type;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
}
/* Continue building up new map based on this information: */
if (current_type != last_type || current_type == E820_TYPE_PRAM) {
if (last_type != 0) {
new_entries[new_nr_entries].size = change_point[chg_idx]->addr - last_addr;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
/* Move forward only if the new size was non-zero: */
if (new_entries[new_nr_entries].size != 0)
/* No more space left for new entries? */
if (++new_nr_entries >= max_nr_entries)
break;
}
if (current_type != 0) {
new_entries[new_nr_entries].addr = change_point[chg_idx]->addr;
new_entries[new_nr_entries].type = current_type;
last_addr = change_point[chg_idx]->addr;
}
last_type = current_type;
}
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
/* Copy the new entries into the original location: */
memcpy(entries, new_entries, new_nr_entries*sizeof(*entries));
table->nr_entries = new_nr_entries;
return 0;
}
x86/boot/e820: Separate the E820 ABI structures from the in-kernel structures Linus pointed out that relying on the compiler to pack structures with enums is fragile not just for the kernel, but for external tooling as well which might rely on our UAPI headers. So separate the two from each other: introduce 'struct boot_e820_entry', which is the boot protocol entry format. This actually simplifies the code, as e820__update_table() is now never called directly with boot protocol table entries - we can rely on append_e820_table() and do a e820__update_table() call afterwards. ( This will allow further simplifications of __e820__update_table(), but that will be done in a separate patch. ) This change also has the side effect of not modifying the bootparams structure anymore - which might be useful for debugging. In theory we could even constify the boot_params structure - at least from the E820 code's point of view. Remove the uapi/asm/e820/types.h file, as it's not used anymore - all kernel side E820 types are defined in asm/e820/types.h. Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-29 11:56:13 +00:00
static int __init __append_e820_table(struct boot_e820_entry *entries, u32 nr_entries)
{
x86/boot/e820: Separate the E820 ABI structures from the in-kernel structures Linus pointed out that relying on the compiler to pack structures with enums is fragile not just for the kernel, but for external tooling as well which might rely on our UAPI headers. So separate the two from each other: introduce 'struct boot_e820_entry', which is the boot protocol entry format. This actually simplifies the code, as e820__update_table() is now never called directly with boot protocol table entries - we can rely on append_e820_table() and do a e820__update_table() call afterwards. ( This will allow further simplifications of __e820__update_table(), but that will be done in a separate patch. ) This change also has the side effect of not modifying the bootparams structure anymore - which might be useful for debugging. In theory we could even constify the boot_params structure - at least from the E820 code's point of view. Remove the uapi/asm/e820/types.h file, as it's not used anymore - all kernel side E820 types are defined in asm/e820/types.h. Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-29 11:56:13 +00:00
struct boot_e820_entry *entry = entries;
while (nr_entries) {
u64 start = entry->addr;
u64 size = entry->size;
u64 end = start + size - 1;
u32 type = entry->type;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
/* Ignore the entry on 64-bit overflow: */
if (start > end && likely(size))
return -1;
x86/boot/e820: Create coherent API function names for E820 range operations We have these three related functions: extern void e820_add_region(u64 start, u64 size, int type); extern u64 e820_update_range(u64 start, u64 size, unsigned old_type, unsigned new_type); extern u64 e820_remove_range(u64 start, u64 size, unsigned old_type, int checktype); But it's not clear from the naming that they are 3 operations based around the same 'memory range' concept. Rename them to better signal this, and move the prototypes next to each other: extern void e820__range_add (u64 start, u64 size, int type); extern u64 e820__range_update(u64 start, u64 size, unsigned old_type, unsigned new_type); extern u64 e820__range_remove(u64 start, u64 size, unsigned old_type, int checktype); Note that this improved organization of the functions shows another problem that was easy to miss before: sometimes the E820 entry type is 'int', sometimes 'unsigned int' - but this will be fixed in a separate patch. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 13:19:36 +00:00
e820__range_add(start, size, type);
entry++;
nr_entries--;
}
return 0;
}
/*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
* Copy the BIOS E820 map into a safe place.
*
* Sanity-check it while we're at it..
*
* If we're lucky and live on a modern system, the setup code
* will have given us a memory map that we can use to properly
* set up memory. If we aren't, we'll fake a memory map.
*/
x86/boot/e820: Separate the E820 ABI structures from the in-kernel structures Linus pointed out that relying on the compiler to pack structures with enums is fragile not just for the kernel, but for external tooling as well which might rely on our UAPI headers. So separate the two from each other: introduce 'struct boot_e820_entry', which is the boot protocol entry format. This actually simplifies the code, as e820__update_table() is now never called directly with boot protocol table entries - we can rely on append_e820_table() and do a e820__update_table() call afterwards. ( This will allow further simplifications of __e820__update_table(), but that will be done in a separate patch. ) This change also has the side effect of not modifying the bootparams structure anymore - which might be useful for debugging. In theory we could even constify the boot_params structure - at least from the E820 code's point of view. Remove the uapi/asm/e820/types.h file, as it's not used anymore - all kernel side E820 types are defined in asm/e820/types.h. Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-29 11:56:13 +00:00
static int __init append_e820_table(struct boot_e820_entry *entries, u32 nr_entries)
{
/* Only one memory region (or negative)? Ignore it */
if (nr_entries < 2)
return -1;
return __append_e820_table(entries, nr_entries);
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
static u64 __init
__e820__range_update(struct e820_table *table, u64 start, u64 size, enum e820_type old_type, enum e820_type new_type)
{
u64 end;
unsigned int i;
u64 real_updated_size = 0;
BUG_ON(old_type == new_type);
if (size > (ULLONG_MAX - start))
size = ULLONG_MAX - start;
end = start + size;
printk(KERN_DEBUG "e820: update [mem %#010Lx-%#010Lx] ", start, end - 1);
e820_print_type(old_type);
pr_cont(" ==> ");
e820_print_type(new_type);
pr_cont("\n");
for (i = 0; i < table->nr_entries; i++) {
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
struct e820_entry *entry = &table->entries[i];
u64 final_start, final_end;
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
u64 entry_end;
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
if (entry->type != old_type)
continue;
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
entry_end = entry->addr + entry->size;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
/* Completely covered by new range? */
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
if (entry->addr >= start && entry_end <= end) {
entry->type = new_type;
real_updated_size += entry->size;
continue;
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
/* New range is completely covered? */
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
if (entry->addr < start && entry_end > end) {
x86/boot/e820: Create coherent API function names for E820 range operations We have these three related functions: extern void e820_add_region(u64 start, u64 size, int type); extern u64 e820_update_range(u64 start, u64 size, unsigned old_type, unsigned new_type); extern u64 e820_remove_range(u64 start, u64 size, unsigned old_type, int checktype); But it's not clear from the naming that they are 3 operations based around the same 'memory range' concept. Rename them to better signal this, and move the prototypes next to each other: extern void e820__range_add (u64 start, u64 size, int type); extern u64 e820__range_update(u64 start, u64 size, unsigned old_type, unsigned new_type); extern u64 e820__range_remove(u64 start, u64 size, unsigned old_type, int checktype); Note that this improved organization of the functions shows another problem that was easy to miss before: sometimes the E820 entry type is 'int', sometimes 'unsigned int' - but this will be fixed in a separate patch. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 13:19:36 +00:00
__e820__range_add(table, start, size, new_type);
__e820__range_add(table, end, entry_end - end, entry->type);
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
entry->size = start - entry->addr;
real_updated_size += size;
continue;
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
/* Partially covered: */
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
final_start = max(start, entry->addr);
final_end = min(end, entry_end);
if (final_start >= final_end)
continue;
x86/boot/e820: Create coherent API function names for E820 range operations We have these three related functions: extern void e820_add_region(u64 start, u64 size, int type); extern u64 e820_update_range(u64 start, u64 size, unsigned old_type, unsigned new_type); extern u64 e820_remove_range(u64 start, u64 size, unsigned old_type, int checktype); But it's not clear from the naming that they are 3 operations based around the same 'memory range' concept. Rename them to better signal this, and move the prototypes next to each other: extern void e820__range_add (u64 start, u64 size, int type); extern u64 e820__range_update(u64 start, u64 size, unsigned old_type, unsigned new_type); extern u64 e820__range_remove(u64 start, u64 size, unsigned old_type, int checktype); Note that this improved organization of the functions shows another problem that was easy to miss before: sometimes the E820 entry type is 'int', sometimes 'unsigned int' - but this will be fixed in a separate patch. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 13:19:36 +00:00
__e820__range_add(table, final_start, final_end - final_start, new_type);
real_updated_size += final_end - final_start;
/*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
* Left range could be head or tail, so need to update
* its size first:
*/
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
entry->size -= final_end - final_start;
if (entry->addr < final_start)
continue;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
entry->addr = final_end;
}
return real_updated_size;
}
u64 __init e820__range_update(u64 start, u64 size, enum e820_type old_type, enum e820_type new_type)
{
x86/boot/e820: Create coherent API function names for E820 range operations We have these three related functions: extern void e820_add_region(u64 start, u64 size, int type); extern u64 e820_update_range(u64 start, u64 size, unsigned old_type, unsigned new_type); extern u64 e820_remove_range(u64 start, u64 size, unsigned old_type, int checktype); But it's not clear from the naming that they are 3 operations based around the same 'memory range' concept. Rename them to better signal this, and move the prototypes next to each other: extern void e820__range_add (u64 start, u64 size, int type); extern u64 e820__range_update(u64 start, u64 size, unsigned old_type, unsigned new_type); extern u64 e820__range_remove(u64 start, u64 size, unsigned old_type, int checktype); Note that this improved organization of the functions shows another problem that was easy to miss before: sometimes the E820 entry type is 'int', sometimes 'unsigned int' - but this will be fixed in a separate patch. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 13:19:36 +00:00
return __e820__range_update(e820_table, start, size, old_type, new_type);
}
static u64 __init e820__range_update_kexec(u64 start, u64 size, enum e820_type old_type, enum e820_type new_type)
{
return __e820__range_update(e820_table_kexec, start, size, old_type, new_type);
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
/* Remove a range of memory from the E820 table: */
u64 __init e820__range_remove(u64 start, u64 size, enum e820_type old_type, bool check_type)
{
int i;
u64 end;
u64 real_removed_size = 0;
if (size > (ULLONG_MAX - start))
size = ULLONG_MAX - start;
end = start + size;
printk(KERN_DEBUG "e820: remove [mem %#010Lx-%#010Lx] ", start, end - 1);
if (check_type)
e820_print_type(old_type);
pr_cont("\n");
for (i = 0; i < e820_table->nr_entries; i++) {
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
struct e820_entry *entry = &e820_table->entries[i];
u64 final_start, final_end;
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
u64 entry_end;
if (check_type && entry->type != old_type)
continue;
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
entry_end = entry->addr + entry->size;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
/* Completely covered? */
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
if (entry->addr >= start && entry_end <= end) {
real_removed_size += entry->size;
memset(entry, 0, sizeof(*entry));
continue;
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
/* Is the new range completely covered? */
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
if (entry->addr < start && entry_end > end) {
x86/boot/e820: Create coherent API function names for E820 range operations We have these three related functions: extern void e820_add_region(u64 start, u64 size, int type); extern u64 e820_update_range(u64 start, u64 size, unsigned old_type, unsigned new_type); extern u64 e820_remove_range(u64 start, u64 size, unsigned old_type, int checktype); But it's not clear from the naming that they are 3 operations based around the same 'memory range' concept. Rename them to better signal this, and move the prototypes next to each other: extern void e820__range_add (u64 start, u64 size, int type); extern u64 e820__range_update(u64 start, u64 size, unsigned old_type, unsigned new_type); extern u64 e820__range_remove(u64 start, u64 size, unsigned old_type, int checktype); Note that this improved organization of the functions shows another problem that was easy to miss before: sometimes the E820 entry type is 'int', sometimes 'unsigned int' - but this will be fixed in a separate patch. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 13:19:36 +00:00
e820__range_add(end, entry_end - end, entry->type);
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
entry->size = start - entry->addr;
real_removed_size += size;
continue;
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
/* Partially covered: */
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
final_start = max(start, entry->addr);
final_end = min(end, entry_end);
if (final_start >= final_end)
continue;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
real_removed_size += final_end - final_start;
/*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
* Left range could be head or tail, so need to update
* the size first:
*/
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
entry->size -= final_end - final_start;
if (entry->addr < final_start)
continue;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
entry->addr = final_end;
}
return real_removed_size;
}
void __init e820__update_table_print(void)
{
x86/boot/e820: Simplify the e820__update_table() interface The e820__update_table() parameters are pretty complex: arch/x86/include/asm/e820/api.h:extern int e820__update_table(struct e820_entry *biosmap, int max_nr_map, u32 *pnr_map); But 90% of the usage is trivial: arch/x86/kernel/e820.c: if (e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries)) arch/x86/kernel/e820.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries); arch/x86/kernel/e820.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries); arch/x86/kernel/e820.c: if (e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries) < 0) arch/x86/kernel/e820.c: e820__update_table(boot_params.e820_table, ARRAY_SIZE(boot_params.e820_table), &new_nr); arch/x86/kernel/early-quirks.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries); arch/x86/kernel/setup.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries); arch/x86/kernel/setup.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries); arch/x86/platform/efi/efi.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries); arch/x86/xen/setup.c: e820__update_table(xen_e820_table.entries, ARRAY_SIZE(xen_e820_table.entries), arch/x86/xen/setup.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries); arch/x86/xen/setup.c: e820__update_table(xen_e820_table.entries, ARRAY_SIZE(xen_e820_table.entries), as it only uses an exiting struct e820_table's entries array, its size and its current number of entries as input and output arguments. Only one use is non-trivial: arch/x86/kernel/e820.c: e820__update_table(boot_params.e820_table, ARRAY_SIZE(boot_params.e820_table), &new_nr); ... which call updates the E820 table in the zeropage in-situ, and the layout there does not match that of 'struct e820_table' (in particular nr_entries is at a different offset, hardcoded by the boot protocol). Simplify all this by introducing a low level __e820__update_table() API that the zeropage update call can use, and simplifying the main e820__update_table() call signature down to: int e820__update_table(struct e820_table *table); This visibly simplifies all the call sites: arch/x86/include/asm/e820/api.h:extern int e820__update_table(struct e820_table *table); arch/x86/include/asm/e820/types.h: * call to e820__update_table() to remove duplicates. The allowance arch/x86/kernel/e820.c: * The return value from e820__update_table() is zero if it arch/x86/kernel/e820.c:int __init e820__update_table(struct e820_table *table) arch/x86/kernel/e820.c: if (e820__update_table(e820_table)) arch/x86/kernel/e820.c: e820__update_table(e820_table_firmware); arch/x86/kernel/e820.c: e820__update_table(e820_table); arch/x86/kernel/e820.c: e820__update_table(e820_table); arch/x86/kernel/e820.c: if (e820__update_table(e820_table) < 0) arch/x86/kernel/early-quirks.c: e820__update_table(e820_table); arch/x86/kernel/setup.c: e820__update_table(e820_table); arch/x86/kernel/setup.c: e820__update_table(e820_table); arch/x86/platform/efi/efi.c: e820__update_table(e820_table); arch/x86/xen/setup.c: e820__update_table(&xen_e820_table); arch/x86/xen/setup.c: e820__update_table(e820_table); arch/x86/xen/setup.c: e820__update_table(&xen_e820_table); No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 17:00:35 +00:00
if (e820__update_table(e820_table))
return;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
pr_info("e820: modified physical RAM map:\n");
e820__print_table("modified");
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
static void __init e820__update_table_kexec(void)
{
e820__update_table(e820_table_kexec);
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
#define MAX_GAP_END 0x100000000ull
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
/*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
* Search for a gap in the E820 memory space from 0 to MAX_GAP_END (4GB).
*/
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
static int __init e820_search_gap(unsigned long *gapstart, unsigned long *gapsize)
{
unsigned long long last = MAX_GAP_END;
int i = e820_table->nr_entries;
int found = 0;
while (--i >= 0) {
unsigned long long start = e820_table->entries[i].addr;
unsigned long long end = start + e820_table->entries[i].size;
/*
* Since "last" is at most 4GB, we know we'll
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
* fit in 32 bits if this condition is true:
*/
if (last > end) {
unsigned long gap = last - end;
if (gap >= *gapsize) {
*gapsize = gap;
*gapstart = end;
found = 1;
}
}
if (start < last)
last = start;
}
return found;
}
/*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
* Search for the biggest gap in the low 32 bits of the E820
* memory space. We pass this space to the PCI subsystem, so
* that it can assign MMIO resources for hotplug or
* unconfigured devices in.
*
* Hopefully the BIOS let enough space left.
*/
__init void e820__setup_pci_gap(void)
{
unsigned long gapstart, gapsize;
int found;
gapsize = 0x400000;
found = e820_search_gap(&gapstart, &gapsize);
if (!found) {
#ifdef CONFIG_X86_64
gapstart = (max_pfn << PAGE_SHIFT) + 1024*1024;
pr_err(
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
"e820: Cannot find an available gap in the 32-bit address range\n"
"e820: PCI devices with unassigned 32-bit BARs may not work!\n");
#else
gapstart = 0x10000000;
#endif
}
/*
* e820__reserve_resources_late() protects stolen RAM already:
*/
pci_mem_start = gapstart;
pr_info("e820: [mem %#010lx-%#010lx] available for PCI devices\n", gapstart, gapstart + gapsize - 1);
}
/*
* Called late during init, in free_initmem().
*
* Initial e820_table and e820_table_kexec are largish __initdata arrays.
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
*
* Copy them to a (usually much smaller) dynamically allocated area that is
* sized precisely after the number of e820 entries.
*
* This is done after we've performed all the fixes and tweaks to the tables.
* All functions which modify them are __init functions, which won't exist
* after free_initmem().
*/
__init void e820__reallocate_tables(void)
{
struct e820_table *n;
int size;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
size = offsetof(struct e820_table, entries) + sizeof(struct e820_entry)*e820_table->nr_entries;
n = kmalloc(size, GFP_KERNEL);
BUG_ON(!n);
memcpy(n, e820_table, size);
e820_table = n;
size = offsetof(struct e820_table, entries) + sizeof(struct e820_entry)*e820_table_kexec->nr_entries;
n = kmalloc(size, GFP_KERNEL);
BUG_ON(!n);
memcpy(n, e820_table_kexec, size);
e820_table_kexec = n;
x86/boot/e820: Introduce the bootloader provided e820_table_firmware[] table Add the real e820_tabel_firmware[] that will not be modified by the kernel or the EFI boot stub under any circumstance. In addition to that modify the code so that e820_table_firmwarep[] is exposed via sysfs to represent the real firmware memory layout, rather than exposing the e820_table_kexec[] table. This fixes a hibernation bug/warning, which uses e820_table_kexec[] to check RAM layout consistency across hibernation/resume: The suspend kernel: [ 0.000000] e820: update [mem 0x76671018-0x76679457] usable ==> usable The resume kernel: [ 0.000000] e820: update [mem 0x7666f018-0x76677457] usable ==> usable ... [ 15.752088] PM: Using 3 thread(s) for decompression. [ 15.752088] PM: Loading and decompressing image data (471870 pages)... [ 15.764971] Hibernate inconsistent memory map detected! [ 15.770833] PM: Image mismatch: architecture specific data Actually it is safe to restore these pages because E820_TYPE_RAM and E820_TYPE_RESERVED_KERN are treated the same during hibernation, so the original e820 table provided by the bootloader is used for hibernation MD5 fingerprint checking. The side effect is that, this newly introduced variable might increase the kernel size at compile time. Suggested-by: Ingo Molnar <mingo@redhat.com> Signed-off-by: Chen Yu <yu.c.chen@intel.com> Cc: Dave Young <dyoung@redhat.com> Cc: Len Brown <lenb@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Xunlei Pang <xlpang@redhat.com> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-07-02 17:07:32 +00:00
size = offsetof(struct e820_table, entries) + sizeof(struct e820_entry)*e820_table_firmware->nr_entries;
n = kmalloc(size, GFP_KERNEL);
BUG_ON(!n);
memcpy(n, e820_table_firmware, size);
e820_table_firmware = n;
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
/*
* Because of the small fixed size of struct boot_params, only the first
* 128 E820 memory entries are passed to the kernel via boot_params.e820_table,
* the remaining (if any) entries are passed via the SETUP_E820_EXT node of
* struct setup_data, which is parsed here.
*/
void __init e820__memory_setup_extended(u64 phys_addr, u32 data_len)
{
int entries;
x86/boot/e820: Separate the E820 ABI structures from the in-kernel structures Linus pointed out that relying on the compiler to pack structures with enums is fragile not just for the kernel, but for external tooling as well which might rely on our UAPI headers. So separate the two from each other: introduce 'struct boot_e820_entry', which is the boot protocol entry format. This actually simplifies the code, as e820__update_table() is now never called directly with boot protocol table entries - we can rely on append_e820_table() and do a e820__update_table() call afterwards. ( This will allow further simplifications of __e820__update_table(), but that will be done in a separate patch. ) This change also has the side effect of not modifying the bootparams structure anymore - which might be useful for debugging. In theory we could even constify the boot_params structure - at least from the E820 code's point of view. Remove the uapi/asm/e820/types.h file, as it's not used anymore - all kernel side E820 types are defined in asm/e820/types.h. Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-29 11:56:13 +00:00
struct boot_e820_entry *extmap;
struct setup_data *sdata;
sdata = early_memremap(phys_addr, data_len);
entries = sdata->len / sizeof(*extmap);
x86/boot/e820: Separate the E820 ABI structures from the in-kernel structures Linus pointed out that relying on the compiler to pack structures with enums is fragile not just for the kernel, but for external tooling as well which might rely on our UAPI headers. So separate the two from each other: introduce 'struct boot_e820_entry', which is the boot protocol entry format. This actually simplifies the code, as e820__update_table() is now never called directly with boot protocol table entries - we can rely on append_e820_table() and do a e820__update_table() call afterwards. ( This will allow further simplifications of __e820__update_table(), but that will be done in a separate patch. ) This change also has the side effect of not modifying the bootparams structure anymore - which might be useful for debugging. In theory we could even constify the boot_params structure - at least from the E820 code's point of view. Remove the uapi/asm/e820/types.h file, as it's not used anymore - all kernel side E820 types are defined in asm/e820/types.h. Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-29 11:56:13 +00:00
extmap = (struct boot_e820_entry *)(sdata->data);
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
__append_e820_table(extmap, entries);
x86/boot/e820: Simplify the e820__update_table() interface The e820__update_table() parameters are pretty complex: arch/x86/include/asm/e820/api.h:extern int e820__update_table(struct e820_entry *biosmap, int max_nr_map, u32 *pnr_map); But 90% of the usage is trivial: arch/x86/kernel/e820.c: if (e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries)) arch/x86/kernel/e820.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries); arch/x86/kernel/e820.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries); arch/x86/kernel/e820.c: if (e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries) < 0) arch/x86/kernel/e820.c: e820__update_table(boot_params.e820_table, ARRAY_SIZE(boot_params.e820_table), &new_nr); arch/x86/kernel/early-quirks.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries); arch/x86/kernel/setup.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries); arch/x86/kernel/setup.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries); arch/x86/platform/efi/efi.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries); arch/x86/xen/setup.c: e820__update_table(xen_e820_table.entries, ARRAY_SIZE(xen_e820_table.entries), arch/x86/xen/setup.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries); arch/x86/xen/setup.c: e820__update_table(xen_e820_table.entries, ARRAY_SIZE(xen_e820_table.entries), as it only uses an exiting struct e820_table's entries array, its size and its current number of entries as input and output arguments. Only one use is non-trivial: arch/x86/kernel/e820.c: e820__update_table(boot_params.e820_table, ARRAY_SIZE(boot_params.e820_table), &new_nr); ... which call updates the E820 table in the zeropage in-situ, and the layout there does not match that of 'struct e820_table' (in particular nr_entries is at a different offset, hardcoded by the boot protocol). Simplify all this by introducing a low level __e820__update_table() API that the zeropage update call can use, and simplifying the main e820__update_table() call signature down to: int e820__update_table(struct e820_table *table); This visibly simplifies all the call sites: arch/x86/include/asm/e820/api.h:extern int e820__update_table(struct e820_table *table); arch/x86/include/asm/e820/types.h: * call to e820__update_table() to remove duplicates. The allowance arch/x86/kernel/e820.c: * The return value from e820__update_table() is zero if it arch/x86/kernel/e820.c:int __init e820__update_table(struct e820_table *table) arch/x86/kernel/e820.c: if (e820__update_table(e820_table)) arch/x86/kernel/e820.c: e820__update_table(e820_table_firmware); arch/x86/kernel/e820.c: e820__update_table(e820_table); arch/x86/kernel/e820.c: e820__update_table(e820_table); arch/x86/kernel/e820.c: if (e820__update_table(e820_table) < 0) arch/x86/kernel/early-quirks.c: e820__update_table(e820_table); arch/x86/kernel/setup.c: e820__update_table(e820_table); arch/x86/kernel/setup.c: e820__update_table(e820_table); arch/x86/platform/efi/efi.c: e820__update_table(e820_table); arch/x86/xen/setup.c: e820__update_table(&xen_e820_table); arch/x86/xen/setup.c: e820__update_table(e820_table); arch/x86/xen/setup.c: e820__update_table(&xen_e820_table); No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 17:00:35 +00:00
e820__update_table(e820_table);
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
memcpy(e820_table_kexec, e820_table, sizeof(*e820_table_kexec));
x86/boot/e820: Introduce the bootloader provided e820_table_firmware[] table Add the real e820_tabel_firmware[] that will not be modified by the kernel or the EFI boot stub under any circumstance. In addition to that modify the code so that e820_table_firmwarep[] is exposed via sysfs to represent the real firmware memory layout, rather than exposing the e820_table_kexec[] table. This fixes a hibernation bug/warning, which uses e820_table_kexec[] to check RAM layout consistency across hibernation/resume: The suspend kernel: [ 0.000000] e820: update [mem 0x76671018-0x76679457] usable ==> usable The resume kernel: [ 0.000000] e820: update [mem 0x7666f018-0x76677457] usable ==> usable ... [ 15.752088] PM: Using 3 thread(s) for decompression. [ 15.752088] PM: Loading and decompressing image data (471870 pages)... [ 15.764971] Hibernate inconsistent memory map detected! [ 15.770833] PM: Image mismatch: architecture specific data Actually it is safe to restore these pages because E820_TYPE_RAM and E820_TYPE_RESERVED_KERN are treated the same during hibernation, so the original e820 table provided by the bootloader is used for hibernation MD5 fingerprint checking. The side effect is that, this newly introduced variable might increase the kernel size at compile time. Suggested-by: Ingo Molnar <mingo@redhat.com> Signed-off-by: Chen Yu <yu.c.chen@intel.com> Cc: Dave Young <dyoung@redhat.com> Cc: Len Brown <lenb@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Xunlei Pang <xlpang@redhat.com> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-07-02 17:07:32 +00:00
memcpy(e820_table_firmware, e820_table, sizeof(*e820_table_firmware));
early_memunmap(sdata, data_len);
pr_info("e820: extended physical RAM map:\n");
e820__print_table("extended");
}
/*
* Find the ranges of physical addresses that do not correspond to
* E820 RAM areas and register the corresponding pages as 'nosave' for
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
* hibernation (32-bit) or software suspend and suspend to RAM (64-bit).
*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
* This function requires the E820 map to be sorted and without any
* overlapping entries.
*/
void __init e820__register_nosave_regions(unsigned long limit_pfn)
{
int i;
unsigned long pfn = 0;
for (i = 0; i < e820_table->nr_entries; i++) {
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
struct e820_entry *entry = &e820_table->entries[i];
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
if (pfn < PFN_UP(entry->addr))
register_nosave_region(pfn, PFN_UP(entry->addr));
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
pfn = PFN_DOWN(entry->addr + entry->size);
if (entry->type != E820_TYPE_RAM && entry->type != E820_TYPE_RESERVED_KERN)
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
register_nosave_region(PFN_UP(entry->addr), pfn);
if (pfn >= limit_pfn)
break;
}
}
x86: extend e820 ealy_res support 32bit move early_res related from e820_64.c to e820.c make edba detection to be done in head32.c remove smp_alloc_memory, because we have fixed trampoline address now. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> arch/x86/kernel/e820.c | 214 ++++++++++++++++++++++++++++++++++++ arch/x86/kernel/e820_64.c | 196 -------------------------------- arch/x86/kernel/head32.c | 76 ++++++++++++ arch/x86/kernel/setup_32.c | 109 +++--------------- arch/x86/kernel/smpboot.c | 17 -- arch/x86/kernel/trampoline.c | 2 arch/x86/mach-voyager/voyager_smp.c | 9 - include/asm-x86/e820.h | 6 + include/asm-x86/e820_64.h | 9 - include/asm-x86/smp.h | 1 arch/x86/kernel/e820.c | 214 ++++++++++++++++++++++++++++++++++++ arch/x86/kernel/e820_64.c | 196 -------------------------------- arch/x86/kernel/head32.c | 76 ++++++++++++ arch/x86/kernel/setup_32.c | 109 +++--------------- arch/x86/kernel/smpboot.c | 17 -- arch/x86/kernel/trampoline.c | 2 arch/x86/mach-voyager/voyager_smp.c | 9 - include/asm-x86/e820.h | 6 + include/asm-x86/e820_64.h | 9 - include/asm-x86/smp.h | 1 arch/x86/kernel/e820.c | 214 ++++++++++++++++++++++++++++++++++++ arch/x86/kernel/e820_64.c | 196 -------------------------------- arch/x86/kernel/head32.c | 76 ++++++++++++ arch/x86/kernel/setup_32.c | 109 +++--------------- arch/x86/kernel/smpboot.c | 17 -- arch/x86/kernel/trampoline.c | 2 arch/x86/mach-voyager/voyager_smp.c | 9 - include/asm-x86/e820.h | 6 + include/asm-x86/e820_64.h | 9 - include/asm-x86/smp.h | 1 10 files changed, 320 insertions(+), 319 deletions(-) Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-05-18 08:18:57 +00:00
#ifdef CONFIG_ACPI
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
/*
* Register ACPI NVS memory regions, so that we can save/restore them during
* hibernation and the subsequent resume:
*/
static int __init e820__register_nvs_regions(void)
{
int i;
for (i = 0; i < e820_table->nr_entries; i++) {
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
struct e820_entry *entry = &e820_table->entries[i];
if (entry->type == E820_TYPE_NVS)
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
acpi_nvs_register(entry->addr, entry->size);
}
return 0;
}
core_initcall(e820__register_nvs_regions);
#endif
/*
x86/boot/e820: Rename early_reserve_e820() to e820__memblock_alloc() and document it early_reserve_e820() is an early hack for kexec that does a limited fixup of the mptable and passes it to the kexec kernel as if it was the real thing. For this it needs to allocate memory - but no memory allocator is available yet beyond the memblock allocator, so early_reserve_e820() is really a wrapper around memblock_alloc() plus a hack to update the e820_table_firmware entries. The name 'reserve' is really a bit of a misnomer, as 'reserved' memory typically means memory completely inaccessible to the kernel - while here what we want to do is a special RAM allocation for our own purposes and insert that as RAM_RESERVED. Rename the function to e820__memblock_alloc_reserved() to better signal this dual purpose, plus document it better, which was omitted when it was merged. The barely comprehensible and cryptic comment: /* * pre allocated 4k and reserved it in memblock and e820_table_firmware */ u64 __init e820__memblock_alloc_reserved(u64 size, u64 align) ... does not count as documentation, replace it with: /* * Allocate the requested number of bytes with the requsted alignment * and return (the physical address) to the caller. Also register this * range in the 'firmware' E820 table. * * This allows kexec to fake a new mptable, as if it came from the real * system. */ u64 __init e820__memblock_alloc_reserved(u64 size, u64 align) No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 12:46:28 +00:00
* Allocate the requested number of bytes with the requsted alignment
* and return (the physical address) to the caller. Also register this
* range in the 'kexec' E820 table as a reserved range.
x86/boot/e820: Rename early_reserve_e820() to e820__memblock_alloc() and document it early_reserve_e820() is an early hack for kexec that does a limited fixup of the mptable and passes it to the kexec kernel as if it was the real thing. For this it needs to allocate memory - but no memory allocator is available yet beyond the memblock allocator, so early_reserve_e820() is really a wrapper around memblock_alloc() plus a hack to update the e820_table_firmware entries. The name 'reserve' is really a bit of a misnomer, as 'reserved' memory typically means memory completely inaccessible to the kernel - while here what we want to do is a special RAM allocation for our own purposes and insert that as RAM_RESERVED. Rename the function to e820__memblock_alloc_reserved() to better signal this dual purpose, plus document it better, which was omitted when it was merged. The barely comprehensible and cryptic comment: /* * pre allocated 4k and reserved it in memblock and e820_table_firmware */ u64 __init e820__memblock_alloc_reserved(u64 size, u64 align) ... does not count as documentation, replace it with: /* * Allocate the requested number of bytes with the requsted alignment * and return (the physical address) to the caller. Also register this * range in the 'firmware' E820 table. * * This allows kexec to fake a new mptable, as if it came from the real * system. */ u64 __init e820__memblock_alloc_reserved(u64 size, u64 align) No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 12:46:28 +00:00
*
* This allows kexec to fake a new mptable, as if it came from the real
* system.
*/
x86/boot/e820: Rename early_reserve_e820() to e820__memblock_alloc() and document it early_reserve_e820() is an early hack for kexec that does a limited fixup of the mptable and passes it to the kexec kernel as if it was the real thing. For this it needs to allocate memory - but no memory allocator is available yet beyond the memblock allocator, so early_reserve_e820() is really a wrapper around memblock_alloc() plus a hack to update the e820_table_firmware entries. The name 'reserve' is really a bit of a misnomer, as 'reserved' memory typically means memory completely inaccessible to the kernel - while here what we want to do is a special RAM allocation for our own purposes and insert that as RAM_RESERVED. Rename the function to e820__memblock_alloc_reserved() to better signal this dual purpose, plus document it better, which was omitted when it was merged. The barely comprehensible and cryptic comment: /* * pre allocated 4k and reserved it in memblock and e820_table_firmware */ u64 __init e820__memblock_alloc_reserved(u64 size, u64 align) ... does not count as documentation, replace it with: /* * Allocate the requested number of bytes with the requsted alignment * and return (the physical address) to the caller. Also register this * range in the 'firmware' E820 table. * * This allows kexec to fake a new mptable, as if it came from the real * system. */ u64 __init e820__memblock_alloc_reserved(u64 size, u64 align) No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 12:46:28 +00:00
u64 __init e820__memblock_alloc_reserved(u64 size, u64 align)
{
u64 addr;
addr = __memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE);
if (addr) {
e820__range_update_kexec(addr, size, E820_TYPE_RAM, E820_TYPE_RESERVED);
pr_info("e820: update e820_table_kexec for e820__memblock_alloc_reserved()\n");
e820__update_table_kexec();
}
return addr;
}
#ifdef CONFIG_X86_32
# ifdef CONFIG_X86_PAE
# define MAX_ARCH_PFN (1ULL<<(36-PAGE_SHIFT))
# else
# define MAX_ARCH_PFN (1ULL<<(32-PAGE_SHIFT))
# endif
#else /* CONFIG_X86_32 */
# define MAX_ARCH_PFN MAXMEM>>PAGE_SHIFT
#endif
/*
* Find the highest page frame number we have available
*/
static unsigned long __init e820_end_pfn(unsigned long limit_pfn, enum e820_type type)
{
int i;
unsigned long last_pfn = 0;
unsigned long max_arch_pfn = MAX_ARCH_PFN;
for (i = 0; i < e820_table->nr_entries; i++) {
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
struct e820_entry *entry = &e820_table->entries[i];
unsigned long start_pfn;
unsigned long end_pfn;
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
if (entry->type != type)
continue;
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
start_pfn = entry->addr >> PAGE_SHIFT;
end_pfn = (entry->addr + entry->size) >> PAGE_SHIFT;
if (start_pfn >= limit_pfn)
continue;
if (end_pfn > limit_pfn) {
last_pfn = limit_pfn;
break;
}
if (end_pfn > last_pfn)
last_pfn = end_pfn;
}
if (last_pfn > max_arch_pfn)
last_pfn = max_arch_pfn;
pr_info("e820: last_pfn = %#lx max_arch_pfn = %#lx\n",
last_pfn, max_arch_pfn);
return last_pfn;
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
unsigned long __init e820__end_of_ram_pfn(void)
{
return e820_end_pfn(MAX_ARCH_PFN, E820_TYPE_RAM);
}
unsigned long __init e820__end_of_low_ram_pfn(void)
{
return e820_end_pfn(1UL << (32 - PAGE_SHIFT), E820_TYPE_RAM);
}
static void __init early_panic(char *msg)
{
early_printk(msg);
panic(msg);
}
static int userdef __initdata;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
/* The "mem=nopentium" boot option disables 4MB page tables on 32-bit kernels: */
static int __init parse_memopt(char *p)
{
u64 mem_size;
if (!p)
return -EINVAL;
if (!strcmp(p, "nopentium")) {
#ifdef CONFIG_X86_32
setup_clear_cpu_cap(X86_FEATURE_PSE);
return 0;
#else
pr_warn("mem=nopentium ignored! (only supported on x86_32)\n");
return -EINVAL;
#endif
}
userdef = 1;
mem_size = memparse(p, &p);
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
/* Don't remove all memory when getting "mem={invalid}" parameter: */
if (mem_size == 0)
return -EINVAL;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
e820__range_remove(mem_size, ULLONG_MAX - mem_size, E820_TYPE_RAM, 1);
return 0;
}
early_param("mem", parse_memopt);
static int __init parse_memmap_one(char *p)
{
char *oldp;
u64 start_at, mem_size;
if (!p)
return -EINVAL;
x86: fix memmap=exactmap boot argument When using kdump modifying the e820 map is yielding strange results. For example starting with BIOS-provided physical RAM map: BIOS-e820: 0000000000000100 - 0000000000093400 (usable) BIOS-e820: 0000000000093400 - 00000000000a0000 (reserved) BIOS-e820: 0000000000100000 - 000000003fee0000 (usable) BIOS-e820: 000000003fee0000 - 000000003fef3000 (ACPI data) BIOS-e820: 000000003fef3000 - 000000003ff80000 (ACPI NVS) BIOS-e820: 000000003ff80000 - 0000000040000000 (reserved) BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved) BIOS-e820: 00000000fec00000 - 00000000fec10000 (reserved) BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved) BIOS-e820: 00000000ff000000 - 0000000100000000 (reserved) and booting with args memmap=exactmap memmap=640K@0K memmap=5228K@16384K memmap=125188K@22252K memmap=76K#1047424K memmap=564K#1047500K resulted in: user-defined physical RAM map: user: 0000000000000000 - 0000000000093400 (usable) user: 0000000000093400 - 00000000000a0000 (reserved) user: 0000000000100000 - 000000003fee0000 (usable) user: 000000003fee0000 - 000000003fef3000 (ACPI data) user: 000000003fef3000 - 000000003ff80000 (ACPI NVS) user: 000000003ff80000 - 0000000040000000 (reserved) user: 00000000e0000000 - 00000000f0000000 (reserved) user: 00000000fec00000 - 00000000fec10000 (reserved) user: 00000000fee00000 - 00000000fee01000 (reserved) user: 00000000ff000000 - 0000000100000000 (reserved) But should have resulted in: user-defined physical RAM map: user: 0000000000000000 - 00000000000a0000 (usable) user: 0000000001000000 - 000000000151b000 (usable) user: 00000000015bb000 - 0000000008ffc000 (usable) user: 000000003fee0000 - 000000003ff80000 (ACPI data) This is happening because of an improper usage of strcmp() in the e820 parsing code. The strcmp() always returns !0 and never resets the value for e820.nr_map and returns an incorrect user-defined map. This patch fixes the problem. Signed-off-by: Prarit Bhargava <prarit@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-09 13:56:08 +00:00
if (!strncmp(p, "exactmap", 8)) {
#ifdef CONFIG_CRASH_DUMP
/*
* If we are doing a crash dump, we still need to know
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
* the real memory size before the original memory map is
* reset.
*/
saved_max_pfn = e820__end_of_ram_pfn();
#endif
e820_table->nr_entries = 0;
userdef = 1;
return 0;
}
oldp = p;
mem_size = memparse(p, &p);
if (p == oldp)
return -EINVAL;
userdef = 1;
if (*p == '@') {
start_at = memparse(p+1, &p);
e820__range_add(start_at, mem_size, E820_TYPE_RAM);
} else if (*p == '#') {
start_at = memparse(p+1, &p);
e820__range_add(start_at, mem_size, E820_TYPE_ACPI);
} else if (*p == '$') {
start_at = memparse(p+1, &p);
e820__range_add(start_at, mem_size, E820_TYPE_RESERVED);
} else if (*p == '!') {
start_at = memparse(p+1, &p);
e820__range_add(start_at, mem_size, E820_TYPE_PRAM);
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
} else {
e820__range_remove(mem_size, ULLONG_MAX - mem_size, E820_TYPE_RAM, 1);
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
}
return *p == '\0' ? 0 : -EINVAL;
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
static int __init parse_memmap_opt(char *str)
{
while (str) {
char *k = strchr(str, ',');
if (k)
*k++ = 0;
parse_memmap_one(str);
str = k;
}
return 0;
}
early_param("memmap", parse_memmap_opt);
/*
* Reserve all entries from the bootloader's extensible data nodes list,
* because if present we are going to use it later on to fetch e820
* entries from it:
*/
void __init e820__reserve_setup_data(void)
{
struct setup_data *data;
u64 pa_data;
pa_data = boot_params.hdr.setup_data;
if (!pa_data)
return;
while (pa_data) {
data = early_memremap(pa_data, sizeof(*data));
e820__range_update(pa_data, sizeof(*data)+data->len, E820_TYPE_RAM, E820_TYPE_RESERVED_KERN);
e820__range_update_kexec(pa_data, sizeof(*data)+data->len, E820_TYPE_RAM, E820_TYPE_RESERVED_KERN);
pa_data = data->next;
early_memunmap(data, sizeof(*data));
}
x86/boot/e820: Simplify the e820__update_table() interface The e820__update_table() parameters are pretty complex: arch/x86/include/asm/e820/api.h:extern int e820__update_table(struct e820_entry *biosmap, int max_nr_map, u32 *pnr_map); But 90% of the usage is trivial: arch/x86/kernel/e820.c: if (e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries)) arch/x86/kernel/e820.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries); arch/x86/kernel/e820.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries); arch/x86/kernel/e820.c: if (e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries) < 0) arch/x86/kernel/e820.c: e820__update_table(boot_params.e820_table, ARRAY_SIZE(boot_params.e820_table), &new_nr); arch/x86/kernel/early-quirks.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries); arch/x86/kernel/setup.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries); arch/x86/kernel/setup.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries); arch/x86/platform/efi/efi.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries); arch/x86/xen/setup.c: e820__update_table(xen_e820_table.entries, ARRAY_SIZE(xen_e820_table.entries), arch/x86/xen/setup.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries); arch/x86/xen/setup.c: e820__update_table(xen_e820_table.entries, ARRAY_SIZE(xen_e820_table.entries), as it only uses an exiting struct e820_table's entries array, its size and its current number of entries as input and output arguments. Only one use is non-trivial: arch/x86/kernel/e820.c: e820__update_table(boot_params.e820_table, ARRAY_SIZE(boot_params.e820_table), &new_nr); ... which call updates the E820 table in the zeropage in-situ, and the layout there does not match that of 'struct e820_table' (in particular nr_entries is at a different offset, hardcoded by the boot protocol). Simplify all this by introducing a low level __e820__update_table() API that the zeropage update call can use, and simplifying the main e820__update_table() call signature down to: int e820__update_table(struct e820_table *table); This visibly simplifies all the call sites: arch/x86/include/asm/e820/api.h:extern int e820__update_table(struct e820_table *table); arch/x86/include/asm/e820/types.h: * call to e820__update_table() to remove duplicates. The allowance arch/x86/kernel/e820.c: * The return value from e820__update_table() is zero if it arch/x86/kernel/e820.c:int __init e820__update_table(struct e820_table *table) arch/x86/kernel/e820.c: if (e820__update_table(e820_table)) arch/x86/kernel/e820.c: e820__update_table(e820_table_firmware); arch/x86/kernel/e820.c: e820__update_table(e820_table); arch/x86/kernel/e820.c: e820__update_table(e820_table); arch/x86/kernel/e820.c: if (e820__update_table(e820_table) < 0) arch/x86/kernel/early-quirks.c: e820__update_table(e820_table); arch/x86/kernel/setup.c: e820__update_table(e820_table); arch/x86/kernel/setup.c: e820__update_table(e820_table); arch/x86/platform/efi/efi.c: e820__update_table(e820_table); arch/x86/xen/setup.c: e820__update_table(&xen_e820_table); arch/x86/xen/setup.c: e820__update_table(e820_table); arch/x86/xen/setup.c: e820__update_table(&xen_e820_table); No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 17:00:35 +00:00
e820__update_table(e820_table);
e820__update_table(e820_table_kexec);
pr_info("extended physical RAM map:\n");
e820__print_table("reserve setup_data");
}
/*
* Called after parse_early_param(), after early parameters (such as mem=)
* have been processed, in which case we already have an E820 table filled in
* via the parameter callback function(s), but it's not sorted and printed yet:
*/
void __init e820__finish_early_params(void)
{
if (userdef) {
x86/boot/e820: Simplify the e820__update_table() interface The e820__update_table() parameters are pretty complex: arch/x86/include/asm/e820/api.h:extern int e820__update_table(struct e820_entry *biosmap, int max_nr_map, u32 *pnr_map); But 90% of the usage is trivial: arch/x86/kernel/e820.c: if (e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries)) arch/x86/kernel/e820.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries); arch/x86/kernel/e820.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries); arch/x86/kernel/e820.c: if (e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries) < 0) arch/x86/kernel/e820.c: e820__update_table(boot_params.e820_table, ARRAY_SIZE(boot_params.e820_table), &new_nr); arch/x86/kernel/early-quirks.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries); arch/x86/kernel/setup.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries); arch/x86/kernel/setup.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries); arch/x86/platform/efi/efi.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries); arch/x86/xen/setup.c: e820__update_table(xen_e820_table.entries, ARRAY_SIZE(xen_e820_table.entries), arch/x86/xen/setup.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries); arch/x86/xen/setup.c: e820__update_table(xen_e820_table.entries, ARRAY_SIZE(xen_e820_table.entries), as it only uses an exiting struct e820_table's entries array, its size and its current number of entries as input and output arguments. Only one use is non-trivial: arch/x86/kernel/e820.c: e820__update_table(boot_params.e820_table, ARRAY_SIZE(boot_params.e820_table), &new_nr); ... which call updates the E820 table in the zeropage in-situ, and the layout there does not match that of 'struct e820_table' (in particular nr_entries is at a different offset, hardcoded by the boot protocol). Simplify all this by introducing a low level __e820__update_table() API that the zeropage update call can use, and simplifying the main e820__update_table() call signature down to: int e820__update_table(struct e820_table *table); This visibly simplifies all the call sites: arch/x86/include/asm/e820/api.h:extern int e820__update_table(struct e820_table *table); arch/x86/include/asm/e820/types.h: * call to e820__update_table() to remove duplicates. The allowance arch/x86/kernel/e820.c: * The return value from e820__update_table() is zero if it arch/x86/kernel/e820.c:int __init e820__update_table(struct e820_table *table) arch/x86/kernel/e820.c: if (e820__update_table(e820_table)) arch/x86/kernel/e820.c: e820__update_table(e820_table_firmware); arch/x86/kernel/e820.c: e820__update_table(e820_table); arch/x86/kernel/e820.c: e820__update_table(e820_table); arch/x86/kernel/e820.c: if (e820__update_table(e820_table) < 0) arch/x86/kernel/early-quirks.c: e820__update_table(e820_table); arch/x86/kernel/setup.c: e820__update_table(e820_table); arch/x86/kernel/setup.c: e820__update_table(e820_table); arch/x86/platform/efi/efi.c: e820__update_table(e820_table); arch/x86/xen/setup.c: e820__update_table(&xen_e820_table); arch/x86/xen/setup.c: e820__update_table(e820_table); arch/x86/xen/setup.c: e820__update_table(&xen_e820_table); No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 17:00:35 +00:00
if (e820__update_table(e820_table) < 0)
early_panic("Invalid user supplied memory map");
pr_info("e820: user-defined physical RAM map:\n");
e820__print_table("user");
}
}
static const char *__init e820_type_to_string(struct e820_entry *entry)
{
switch (entry->type) {
case E820_TYPE_RESERVED_KERN: /* Fall-through: */
case E820_TYPE_RAM: return "System RAM";
case E820_TYPE_ACPI: return "ACPI Tables";
case E820_TYPE_NVS: return "ACPI Non-volatile Storage";
case E820_TYPE_UNUSABLE: return "Unusable memory";
case E820_TYPE_PRAM: return "Persistent Memory (legacy)";
case E820_TYPE_PMEM: return "Persistent Memory";
x86/boot/e820: Fix and clean up e820_type switch() statements A test-build of e820.o with -Wswitch-enum shows the following warnings: arch/x86/kernel/e820.c: In function ‘e820_type_to_string’: arch/x86/kernel/e820.c:965:2: warning: enumeration value ‘E820_TYPE_RESERVED’ not handled in switch [-Wswitch-enum] switch (entry->type) { ^ arch/x86/kernel/e820.c: In function ‘e820_type_to_iomem_type’: arch/x86/kernel/e820.c:979:2: warning: enumeration value ‘E820_TYPE_RESERVED’ not handled in switch [-Wswitch-enum] switch (entry->type) { ^ arch/x86/kernel/e820.c: In function ‘e820_type_to_iores_desc’: arch/x86/kernel/e820.c:993:2: warning: enumeration value ‘E820_TYPE_RESERVED’ not handled in switch [-Wswitch-enum] switch (entry->type) { ^ arch/x86/kernel/e820.c: In function ‘do_mark_busy’: arch/x86/kernel/e820.c:1015:2: warning: enumeration value ‘E820_TYPE_RAM’ not handled in switch [-Wswitch-enum] switch (type) { ^ Here's the four warnings: - The one in e820_type_to_string() is a borderline bug, we should differentiate known-reserved E820 types from unknown types. Fix it by printing a separate message for unknown E820 types. - The ones in e820_type_to_iomem_type(), e820_type_to_iores_desc() and do_mark_busy() are worth documenting, at least to the extent of enumerating them explicitly. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-29 08:40:26 +00:00
case E820_TYPE_RESERVED: return "Reserved";
default: return "Unknown E820 type";
}
}
static unsigned long __init e820_type_to_iomem_type(struct e820_entry *entry)
x86/e820: Set System RAM type and descriptor Change e820_reserve_resources() to set 'flags' and 'desc' from e820 types. Set E820_RESERVED_KERN and E820_RAM's (System RAM) io resource type to IORESOURCE_SYSTEM_RAM. Do the same for "Kernel data", "Kernel code", and "Kernel bss", which are child nodes of System RAM. I/O resource descriptor is set to 'desc' for entries that are (and will be) target ranges of walk_iomem_res() and region_intersects(). Signed-off-by: Toshi Kani <toshi.kani@hpe.com> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Baoquan He <bhe@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Dave Young <dyoung@redhat.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Joerg Roedel <jroedel@suse.de> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Luis R. Rodriguez <mcgrof@suse.com> Cc: Mark Salter <msalter@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Toshi Kani <toshi.kani@hp.com> Cc: WANG Chao <chaowang@redhat.com> Cc: linux-arch@vger.kernel.org Cc: linux-mm <linux-mm@kvack.org> Link: http://lkml.kernel.org/r/1453841853-11383-5-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-26 20:57:20 +00:00
{
switch (entry->type) {
case E820_TYPE_RESERVED_KERN: /* Fall-through: */
case E820_TYPE_RAM: return IORESOURCE_SYSTEM_RAM;
case E820_TYPE_ACPI: /* Fall-through: */
case E820_TYPE_NVS: /* Fall-through: */
case E820_TYPE_UNUSABLE: /* Fall-through: */
case E820_TYPE_PRAM: /* Fall-through: */
case E820_TYPE_PMEM: /* Fall-through: */
x86/boot/e820: Fix and clean up e820_type switch() statements A test-build of e820.o with -Wswitch-enum shows the following warnings: arch/x86/kernel/e820.c: In function ‘e820_type_to_string’: arch/x86/kernel/e820.c:965:2: warning: enumeration value ‘E820_TYPE_RESERVED’ not handled in switch [-Wswitch-enum] switch (entry->type) { ^ arch/x86/kernel/e820.c: In function ‘e820_type_to_iomem_type’: arch/x86/kernel/e820.c:979:2: warning: enumeration value ‘E820_TYPE_RESERVED’ not handled in switch [-Wswitch-enum] switch (entry->type) { ^ arch/x86/kernel/e820.c: In function ‘e820_type_to_iores_desc’: arch/x86/kernel/e820.c:993:2: warning: enumeration value ‘E820_TYPE_RESERVED’ not handled in switch [-Wswitch-enum] switch (entry->type) { ^ arch/x86/kernel/e820.c: In function ‘do_mark_busy’: arch/x86/kernel/e820.c:1015:2: warning: enumeration value ‘E820_TYPE_RAM’ not handled in switch [-Wswitch-enum] switch (type) { ^ Here's the four warnings: - The one in e820_type_to_string() is a borderline bug, we should differentiate known-reserved E820 types from unknown types. Fix it by printing a separate message for unknown E820 types. - The ones in e820_type_to_iomem_type(), e820_type_to_iores_desc() and do_mark_busy() are worth documenting, at least to the extent of enumerating them explicitly. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-29 08:40:26 +00:00
case E820_TYPE_RESERVED: /* Fall-through: */
default: return IORESOURCE_MEM;
x86/e820: Set System RAM type and descriptor Change e820_reserve_resources() to set 'flags' and 'desc' from e820 types. Set E820_RESERVED_KERN and E820_RAM's (System RAM) io resource type to IORESOURCE_SYSTEM_RAM. Do the same for "Kernel data", "Kernel code", and "Kernel bss", which are child nodes of System RAM. I/O resource descriptor is set to 'desc' for entries that are (and will be) target ranges of walk_iomem_res() and region_intersects(). Signed-off-by: Toshi Kani <toshi.kani@hpe.com> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Baoquan He <bhe@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Dave Young <dyoung@redhat.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Joerg Roedel <jroedel@suse.de> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Luis R. Rodriguez <mcgrof@suse.com> Cc: Mark Salter <msalter@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Toshi Kani <toshi.kani@hp.com> Cc: WANG Chao <chaowang@redhat.com> Cc: linux-arch@vger.kernel.org Cc: linux-mm <linux-mm@kvack.org> Link: http://lkml.kernel.org/r/1453841853-11383-5-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-26 20:57:20 +00:00
}
}
static unsigned long __init e820_type_to_iores_desc(struct e820_entry *entry)
x86/e820: Set System RAM type and descriptor Change e820_reserve_resources() to set 'flags' and 'desc' from e820 types. Set E820_RESERVED_KERN and E820_RAM's (System RAM) io resource type to IORESOURCE_SYSTEM_RAM. Do the same for "Kernel data", "Kernel code", and "Kernel bss", which are child nodes of System RAM. I/O resource descriptor is set to 'desc' for entries that are (and will be) target ranges of walk_iomem_res() and region_intersects(). Signed-off-by: Toshi Kani <toshi.kani@hpe.com> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Baoquan He <bhe@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Dave Young <dyoung@redhat.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Joerg Roedel <jroedel@suse.de> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Luis R. Rodriguez <mcgrof@suse.com> Cc: Mark Salter <msalter@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Toshi Kani <toshi.kani@hp.com> Cc: WANG Chao <chaowang@redhat.com> Cc: linux-arch@vger.kernel.org Cc: linux-mm <linux-mm@kvack.org> Link: http://lkml.kernel.org/r/1453841853-11383-5-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-26 20:57:20 +00:00
{
switch (entry->type) {
case E820_TYPE_ACPI: return IORES_DESC_ACPI_TABLES;
case E820_TYPE_NVS: return IORES_DESC_ACPI_NV_STORAGE;
case E820_TYPE_PMEM: return IORES_DESC_PERSISTENT_MEMORY;
case E820_TYPE_PRAM: return IORES_DESC_PERSISTENT_MEMORY_LEGACY;
case E820_TYPE_RESERVED_KERN: /* Fall-through: */
case E820_TYPE_RAM: /* Fall-through: */
case E820_TYPE_UNUSABLE: /* Fall-through: */
x86/boot/e820: Fix and clean up e820_type switch() statements A test-build of e820.o with -Wswitch-enum shows the following warnings: arch/x86/kernel/e820.c: In function ‘e820_type_to_string’: arch/x86/kernel/e820.c:965:2: warning: enumeration value ‘E820_TYPE_RESERVED’ not handled in switch [-Wswitch-enum] switch (entry->type) { ^ arch/x86/kernel/e820.c: In function ‘e820_type_to_iomem_type’: arch/x86/kernel/e820.c:979:2: warning: enumeration value ‘E820_TYPE_RESERVED’ not handled in switch [-Wswitch-enum] switch (entry->type) { ^ arch/x86/kernel/e820.c: In function ‘e820_type_to_iores_desc’: arch/x86/kernel/e820.c:993:2: warning: enumeration value ‘E820_TYPE_RESERVED’ not handled in switch [-Wswitch-enum] switch (entry->type) { ^ arch/x86/kernel/e820.c: In function ‘do_mark_busy’: arch/x86/kernel/e820.c:1015:2: warning: enumeration value ‘E820_TYPE_RAM’ not handled in switch [-Wswitch-enum] switch (type) { ^ Here's the four warnings: - The one in e820_type_to_string() is a borderline bug, we should differentiate known-reserved E820 types from unknown types. Fix it by printing a separate message for unknown E820 types. - The ones in e820_type_to_iomem_type(), e820_type_to_iores_desc() and do_mark_busy() are worth documenting, at least to the extent of enumerating them explicitly. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-29 08:40:26 +00:00
case E820_TYPE_RESERVED: /* Fall-through: */
default: return IORES_DESC_NONE;
x86/e820: Set System RAM type and descriptor Change e820_reserve_resources() to set 'flags' and 'desc' from e820 types. Set E820_RESERVED_KERN and E820_RAM's (System RAM) io resource type to IORESOURCE_SYSTEM_RAM. Do the same for "Kernel data", "Kernel code", and "Kernel bss", which are child nodes of System RAM. I/O resource descriptor is set to 'desc' for entries that are (and will be) target ranges of walk_iomem_res() and region_intersects(). Signed-off-by: Toshi Kani <toshi.kani@hpe.com> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Baoquan He <bhe@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Dave Young <dyoung@redhat.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Joerg Roedel <jroedel@suse.de> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Luis R. Rodriguez <mcgrof@suse.com> Cc: Mark Salter <msalter@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Toshi Kani <toshi.kani@hp.com> Cc: WANG Chao <chaowang@redhat.com> Cc: linux-arch@vger.kernel.org Cc: linux-mm <linux-mm@kvack.org> Link: http://lkml.kernel.org/r/1453841853-11383-5-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-26 20:57:20 +00:00
}
}
x86/boot/e820: Fix and clean up e820_type switch() statements A test-build of e820.o with -Wswitch-enum shows the following warnings: arch/x86/kernel/e820.c: In function ‘e820_type_to_string’: arch/x86/kernel/e820.c:965:2: warning: enumeration value ‘E820_TYPE_RESERVED’ not handled in switch [-Wswitch-enum] switch (entry->type) { ^ arch/x86/kernel/e820.c: In function ‘e820_type_to_iomem_type’: arch/x86/kernel/e820.c:979:2: warning: enumeration value ‘E820_TYPE_RESERVED’ not handled in switch [-Wswitch-enum] switch (entry->type) { ^ arch/x86/kernel/e820.c: In function ‘e820_type_to_iores_desc’: arch/x86/kernel/e820.c:993:2: warning: enumeration value ‘E820_TYPE_RESERVED’ not handled in switch [-Wswitch-enum] switch (entry->type) { ^ arch/x86/kernel/e820.c: In function ‘do_mark_busy’: arch/x86/kernel/e820.c:1015:2: warning: enumeration value ‘E820_TYPE_RAM’ not handled in switch [-Wswitch-enum] switch (type) { ^ Here's the four warnings: - The one in e820_type_to_string() is a borderline bug, we should differentiate known-reserved E820 types from unknown types. Fix it by printing a separate message for unknown E820 types. - The ones in e820_type_to_iomem_type(), e820_type_to_iores_desc() and do_mark_busy() are worth documenting, at least to the extent of enumerating them explicitly. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-29 08:40:26 +00:00
static bool __init do_mark_busy(enum e820_type type, struct resource *res)
{
/* this is the legacy bios/dos rom-shadow + mmio region */
if (res->start < (1ULL<<20))
return true;
/*
* Treat persistent memory like device memory, i.e. reserve it
* for exclusive use of a driver
*/
switch (type) {
case E820_TYPE_RESERVED:
case E820_TYPE_PRAM:
case E820_TYPE_PMEM:
return false;
x86/boot/e820: Fix and clean up e820_type switch() statements A test-build of e820.o with -Wswitch-enum shows the following warnings: arch/x86/kernel/e820.c: In function ‘e820_type_to_string’: arch/x86/kernel/e820.c:965:2: warning: enumeration value ‘E820_TYPE_RESERVED’ not handled in switch [-Wswitch-enum] switch (entry->type) { ^ arch/x86/kernel/e820.c: In function ‘e820_type_to_iomem_type’: arch/x86/kernel/e820.c:979:2: warning: enumeration value ‘E820_TYPE_RESERVED’ not handled in switch [-Wswitch-enum] switch (entry->type) { ^ arch/x86/kernel/e820.c: In function ‘e820_type_to_iores_desc’: arch/x86/kernel/e820.c:993:2: warning: enumeration value ‘E820_TYPE_RESERVED’ not handled in switch [-Wswitch-enum] switch (entry->type) { ^ arch/x86/kernel/e820.c: In function ‘do_mark_busy’: arch/x86/kernel/e820.c:1015:2: warning: enumeration value ‘E820_TYPE_RAM’ not handled in switch [-Wswitch-enum] switch (type) { ^ Here's the four warnings: - The one in e820_type_to_string() is a borderline bug, we should differentiate known-reserved E820 types from unknown types. Fix it by printing a separate message for unknown E820 types. - The ones in e820_type_to_iomem_type(), e820_type_to_iores_desc() and do_mark_busy() are worth documenting, at least to the extent of enumerating them explicitly. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-29 08:40:26 +00:00
case E820_TYPE_RESERVED_KERN:
case E820_TYPE_RAM:
case E820_TYPE_ACPI:
case E820_TYPE_NVS:
case E820_TYPE_UNUSABLE:
default:
return true;
}
}
/*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
* Mark E820 reserved areas as busy for the resource manager:
*/
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
static struct resource __initdata *e820_res;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
void __init e820__reserve_resources(void)
{
int i;
struct resource *res;
u64 end;
res = alloc_bootmem(sizeof(*res) * e820_table->nr_entries);
e820_res = res;
for (i = 0; i < e820_table->nr_entries; i++) {
struct e820_entry *entry = e820_table->entries + i;
end = entry->addr + entry->size - 1;
if (end != (resource_size_t)end) {
res++;
continue;
}
res->start = entry->addr;
res->end = end;
res->name = e820_type_to_string(entry);
res->flags = e820_type_to_iomem_type(entry);
res->desc = e820_type_to_iores_desc(entry);
/*
* Don't register the region that could be conflicted with
* PCI device BAR resources and insert them later in
* pcibios_resource_survey():
*/
if (do_mark_busy(entry->type, res)) {
x86: Clean up late e820 resource allocation This makes the late e820 resources use 'insert_resource_expand_to_fit()' instead of doing a 'reserve_region_with_split()', and also avoids marking them as IORESOURCE_BUSY. This results in us being perfectly happy to use pre-existing PCI resources even if they were marked as being in a reserved region, while still avoiding any _new_ allocations in the reserved regions. It also makes for a simpler and more accurate resource tree. Example resource allocation from Jonathan Corbet, who has firmware that has an e820 reserved entry that covered a big range (e0000000-fed003ff), and that had various PCI resources in it set up by firmware. With old kernels, the reserved range would force us to re-allocate all pre-existing PCI resources, and his reserved range would end up looking like this: e0000000-fed003ff : reserved fec00000-fec00fff : IOAPIC 0 fed00000-fed003ff : HPET 0 where only the pre-allocated special regions (IOAPIC and HPET) were kept around. With 2.6.28-rc2, which uses 'reserve_region_with_split()', Jonathan's resource tree looked like this: e0000000-fe7fffff : reserved fe800000-fe8fffff : PCI Bus 0000:01 fe800000-fe8fffff : reserved fe900000-fe9d9aff : reserved fe9d9b00-fe9d9bff : 0000:00:1f.3 fe9d9b00-fe9d9bff : reserved fe9d9c00-fe9d9fff : 0000:00:1a.7 fe9d9c00-fe9d9fff : reserved fe9da000-fe9dafff : 0000:00:03.3 fe9da000-fe9dafff : reserved fe9db000-fe9dbfff : 0000:00:19.0 fe9db000-fe9dbfff : reserved fe9dc000-fe9dffff : 0000:00:1b.0 fe9dc000-fe9dffff : reserved fe9e0000-fe9fffff : 0000:00:19.0 fe9e0000-fe9fffff : reserved fea00000-fea7ffff : 0000:00:02.0 fea00000-fea7ffff : reserved fea80000-feafffff : 0000:00:02.1 fea80000-feafffff : reserved feb00000-febfffff : 0000:00:02.0 feb00000-febfffff : reserved fec00000-fed003ff : reserved fec00000-fec00fff : IOAPIC 0 fed00000-fed003ff : HPET 0 and because the reserved entry had been split and moved into the individual resources, and because it used the IORESOURCE_BUSY flag, the drivers that actually wanted to _use_ those resources couldn't actually attach to them: e1000e 0000:00:19.0: BAR 0: can't reserve mem region [0xfe9e0000-0xfe9fffff] HDA Intel 0000:00:1b.0: BAR 0: can't reserve mem region [0xfe9dc000-0xfe9dffff] with this patch, the resource tree instead becomes e0000000-fed003ff : reserved fe800000-fe8fffff : PCI Bus 0000:01 fe9d9b00-fe9d9bff : 0000:00:1f.3 fe9d9c00-fe9d9fff : 0000:00:1a.7 fe9d9c00-fe9d9fff : ehci_hcd fe9da000-fe9dafff : 0000:00:03.3 fe9db000-fe9dbfff : 0000:00:19.0 fe9db000-fe9dbfff : e1000e fe9dc000-fe9dffff : 0000:00:1b.0 fe9dc000-fe9dffff : ICH HD audio fe9e0000-fe9fffff : 0000:00:19.0 fe9e0000-fe9fffff : e1000e fea00000-fea7ffff : 0000:00:02.0 fea80000-feafffff : 0000:00:02.1 feb00000-febfffff : 0000:00:02.0 fec00000-fec00fff : IOAPIC 0 fed00000-fed003ff : HPET 0 ie the one reserved region now ends up surrounding all the PCI resources that were allocated inside of it by firmware, and because it is not marked BUSY, drivers have no problem attaching to the pre-allocated resources. Reported-and-tested-by: Jonathan Corbet <corbet@lwn.net> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Robert Hancock <hancockr@shaw.ca> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-01 17:17:22 +00:00
res->flags |= IORESOURCE_BUSY;
insert_resource(&iomem_resource, res);
x86: Clean up late e820 resource allocation This makes the late e820 resources use 'insert_resource_expand_to_fit()' instead of doing a 'reserve_region_with_split()', and also avoids marking them as IORESOURCE_BUSY. This results in us being perfectly happy to use pre-existing PCI resources even if they were marked as being in a reserved region, while still avoiding any _new_ allocations in the reserved regions. It also makes for a simpler and more accurate resource tree. Example resource allocation from Jonathan Corbet, who has firmware that has an e820 reserved entry that covered a big range (e0000000-fed003ff), and that had various PCI resources in it set up by firmware. With old kernels, the reserved range would force us to re-allocate all pre-existing PCI resources, and his reserved range would end up looking like this: e0000000-fed003ff : reserved fec00000-fec00fff : IOAPIC 0 fed00000-fed003ff : HPET 0 where only the pre-allocated special regions (IOAPIC and HPET) were kept around. With 2.6.28-rc2, which uses 'reserve_region_with_split()', Jonathan's resource tree looked like this: e0000000-fe7fffff : reserved fe800000-fe8fffff : PCI Bus 0000:01 fe800000-fe8fffff : reserved fe900000-fe9d9aff : reserved fe9d9b00-fe9d9bff : 0000:00:1f.3 fe9d9b00-fe9d9bff : reserved fe9d9c00-fe9d9fff : 0000:00:1a.7 fe9d9c00-fe9d9fff : reserved fe9da000-fe9dafff : 0000:00:03.3 fe9da000-fe9dafff : reserved fe9db000-fe9dbfff : 0000:00:19.0 fe9db000-fe9dbfff : reserved fe9dc000-fe9dffff : 0000:00:1b.0 fe9dc000-fe9dffff : reserved fe9e0000-fe9fffff : 0000:00:19.0 fe9e0000-fe9fffff : reserved fea00000-fea7ffff : 0000:00:02.0 fea00000-fea7ffff : reserved fea80000-feafffff : 0000:00:02.1 fea80000-feafffff : reserved feb00000-febfffff : 0000:00:02.0 feb00000-febfffff : reserved fec00000-fed003ff : reserved fec00000-fec00fff : IOAPIC 0 fed00000-fed003ff : HPET 0 and because the reserved entry had been split and moved into the individual resources, and because it used the IORESOURCE_BUSY flag, the drivers that actually wanted to _use_ those resources couldn't actually attach to them: e1000e 0000:00:19.0: BAR 0: can't reserve mem region [0xfe9e0000-0xfe9fffff] HDA Intel 0000:00:1b.0: BAR 0: can't reserve mem region [0xfe9dc000-0xfe9dffff] with this patch, the resource tree instead becomes e0000000-fed003ff : reserved fe800000-fe8fffff : PCI Bus 0000:01 fe9d9b00-fe9d9bff : 0000:00:1f.3 fe9d9c00-fe9d9fff : 0000:00:1a.7 fe9d9c00-fe9d9fff : ehci_hcd fe9da000-fe9dafff : 0000:00:03.3 fe9db000-fe9dbfff : 0000:00:19.0 fe9db000-fe9dbfff : e1000e fe9dc000-fe9dffff : 0000:00:1b.0 fe9dc000-fe9dffff : ICH HD audio fe9e0000-fe9fffff : 0000:00:19.0 fe9e0000-fe9fffff : e1000e fea00000-fea7ffff : 0000:00:02.0 fea80000-feafffff : 0000:00:02.1 feb00000-febfffff : 0000:00:02.0 fec00000-fec00fff : IOAPIC 0 fed00000-fed003ff : HPET 0 ie the one reserved region now ends up surrounding all the PCI resources that were allocated inside of it by firmware, and because it is not marked BUSY, drivers have no problem attaching to the pre-allocated resources. Reported-and-tested-by: Jonathan Corbet <corbet@lwn.net> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Robert Hancock <hancockr@shaw.ca> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-01 17:17:22 +00:00
}
res++;
}
x86/boot/e820: Introduce the bootloader provided e820_table_firmware[] table Add the real e820_tabel_firmware[] that will not be modified by the kernel or the EFI boot stub under any circumstance. In addition to that modify the code so that e820_table_firmwarep[] is exposed via sysfs to represent the real firmware memory layout, rather than exposing the e820_table_kexec[] table. This fixes a hibernation bug/warning, which uses e820_table_kexec[] to check RAM layout consistency across hibernation/resume: The suspend kernel: [ 0.000000] e820: update [mem 0x76671018-0x76679457] usable ==> usable The resume kernel: [ 0.000000] e820: update [mem 0x7666f018-0x76677457] usable ==> usable ... [ 15.752088] PM: Using 3 thread(s) for decompression. [ 15.752088] PM: Loading and decompressing image data (471870 pages)... [ 15.764971] Hibernate inconsistent memory map detected! [ 15.770833] PM: Image mismatch: architecture specific data Actually it is safe to restore these pages because E820_TYPE_RAM and E820_TYPE_RESERVED_KERN are treated the same during hibernation, so the original e820 table provided by the bootloader is used for hibernation MD5 fingerprint checking. The side effect is that, this newly introduced variable might increase the kernel size at compile time. Suggested-by: Ingo Molnar <mingo@redhat.com> Signed-off-by: Chen Yu <yu.c.chen@intel.com> Cc: Dave Young <dyoung@redhat.com> Cc: Len Brown <lenb@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Xunlei Pang <xlpang@redhat.com> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-07-02 17:07:32 +00:00
/* Expose the bootloader-provided memory layout to the sysfs. */
for (i = 0; i < e820_table_firmware->nr_entries; i++) {
struct e820_entry *entry = e820_table_firmware->entries + i;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
firmware_map_add_early(entry->addr, entry->addr + entry->size, e820_type_to_string(entry));
}
}
/*
* How much should we pad the end of RAM, depending on where it is?
*/
static unsigned long __init ram_alignment(resource_size_t pos)
{
unsigned long mb = pos >> 20;
/* To 64kB in the first megabyte */
if (!mb)
return 64*1024;
/* To 1MB in the first 16MB */
if (mb < 16)
return 1024*1024;
/* To 64MB for anything above that */
return 64*1024*1024;
}
#define MAX_RESOURCE_SIZE ((resource_size_t)-1)
void __init e820__reserve_resources_late(void)
{
int i;
struct resource *res;
res = e820_res;
for (i = 0; i < e820_table->nr_entries; i++) {
if (!res->parent && res->end)
x86: Clean up late e820 resource allocation This makes the late e820 resources use 'insert_resource_expand_to_fit()' instead of doing a 'reserve_region_with_split()', and also avoids marking them as IORESOURCE_BUSY. This results in us being perfectly happy to use pre-existing PCI resources even if they were marked as being in a reserved region, while still avoiding any _new_ allocations in the reserved regions. It also makes for a simpler and more accurate resource tree. Example resource allocation from Jonathan Corbet, who has firmware that has an e820 reserved entry that covered a big range (e0000000-fed003ff), and that had various PCI resources in it set up by firmware. With old kernels, the reserved range would force us to re-allocate all pre-existing PCI resources, and his reserved range would end up looking like this: e0000000-fed003ff : reserved fec00000-fec00fff : IOAPIC 0 fed00000-fed003ff : HPET 0 where only the pre-allocated special regions (IOAPIC and HPET) were kept around. With 2.6.28-rc2, which uses 'reserve_region_with_split()', Jonathan's resource tree looked like this: e0000000-fe7fffff : reserved fe800000-fe8fffff : PCI Bus 0000:01 fe800000-fe8fffff : reserved fe900000-fe9d9aff : reserved fe9d9b00-fe9d9bff : 0000:00:1f.3 fe9d9b00-fe9d9bff : reserved fe9d9c00-fe9d9fff : 0000:00:1a.7 fe9d9c00-fe9d9fff : reserved fe9da000-fe9dafff : 0000:00:03.3 fe9da000-fe9dafff : reserved fe9db000-fe9dbfff : 0000:00:19.0 fe9db000-fe9dbfff : reserved fe9dc000-fe9dffff : 0000:00:1b.0 fe9dc000-fe9dffff : reserved fe9e0000-fe9fffff : 0000:00:19.0 fe9e0000-fe9fffff : reserved fea00000-fea7ffff : 0000:00:02.0 fea00000-fea7ffff : reserved fea80000-feafffff : 0000:00:02.1 fea80000-feafffff : reserved feb00000-febfffff : 0000:00:02.0 feb00000-febfffff : reserved fec00000-fed003ff : reserved fec00000-fec00fff : IOAPIC 0 fed00000-fed003ff : HPET 0 and because the reserved entry had been split and moved into the individual resources, and because it used the IORESOURCE_BUSY flag, the drivers that actually wanted to _use_ those resources couldn't actually attach to them: e1000e 0000:00:19.0: BAR 0: can't reserve mem region [0xfe9e0000-0xfe9fffff] HDA Intel 0000:00:1b.0: BAR 0: can't reserve mem region [0xfe9dc000-0xfe9dffff] with this patch, the resource tree instead becomes e0000000-fed003ff : reserved fe800000-fe8fffff : PCI Bus 0000:01 fe9d9b00-fe9d9bff : 0000:00:1f.3 fe9d9c00-fe9d9fff : 0000:00:1a.7 fe9d9c00-fe9d9fff : ehci_hcd fe9da000-fe9dafff : 0000:00:03.3 fe9db000-fe9dbfff : 0000:00:19.0 fe9db000-fe9dbfff : e1000e fe9dc000-fe9dffff : 0000:00:1b.0 fe9dc000-fe9dffff : ICH HD audio fe9e0000-fe9fffff : 0000:00:19.0 fe9e0000-fe9fffff : e1000e fea00000-fea7ffff : 0000:00:02.0 fea80000-feafffff : 0000:00:02.1 feb00000-febfffff : 0000:00:02.0 fec00000-fec00fff : IOAPIC 0 fed00000-fed003ff : HPET 0 ie the one reserved region now ends up surrounding all the PCI resources that were allocated inside of it by firmware, and because it is not marked BUSY, drivers have no problem attaching to the pre-allocated resources. Reported-and-tested-by: Jonathan Corbet <corbet@lwn.net> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Robert Hancock <hancockr@shaw.ca> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-01 17:17:22 +00:00
insert_resource_expand_to_fit(&iomem_resource, res);
res++;
}
/*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
* Try to bump up RAM regions to reasonable boundaries, to
* avoid stolen RAM:
*/
for (i = 0; i < e820_table->nr_entries; i++) {
struct e820_entry *entry = &e820_table->entries[i];
u64 start, end;
if (entry->type != E820_TYPE_RAM)
continue;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
start = entry->addr + entry->size;
end = round_up(start, ram_alignment(start)) - 1;
if (end > MAX_RESOURCE_SIZE)
end = MAX_RESOURCE_SIZE;
if (start >= end)
continue;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
printk(KERN_DEBUG "e820: reserve RAM buffer [mem %#010llx-%#010llx]\n", start, end);
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
reserve_region_with_split(&iomem_resource, start, end, "RAM buffer");
}
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
/*
* Pass the firmware (bootloader) E820 map to the kernel and process it:
*/
char *__init e820__memory_setup_default(void)
{
char *who = "BIOS-e820";
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
/*
* Try to copy the BIOS-supplied E820-map.
*
* Otherwise fake a memory map; one section from 0k->640k,
* the next section from 1mb->appropriate_mem_k
*/
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) {
u64 mem_size;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
/* Compare results from other methods and take the one that gives more RAM: */
if (boot_params.alt_mem_k < boot_params.screen_info.ext_mem_k) {
mem_size = boot_params.screen_info.ext_mem_k;
who = "BIOS-88";
} else {
mem_size = boot_params.alt_mem_k;
who = "BIOS-e801";
}
e820_table->nr_entries = 0;
e820__range_add(0, LOWMEMSIZE(), E820_TYPE_RAM);
e820__range_add(HIGH_MEMORY, mem_size << 10, E820_TYPE_RAM);
}
x86/boot/e820: Separate the E820 ABI structures from the in-kernel structures Linus pointed out that relying on the compiler to pack structures with enums is fragile not just for the kernel, but for external tooling as well which might rely on our UAPI headers. So separate the two from each other: introduce 'struct boot_e820_entry', which is the boot protocol entry format. This actually simplifies the code, as e820__update_table() is now never called directly with boot protocol table entries - we can rely on append_e820_table() and do a e820__update_table() call afterwards. ( This will allow further simplifications of __e820__update_table(), but that will be done in a separate patch. ) This change also has the side effect of not modifying the bootparams structure anymore - which might be useful for debugging. In theory we could even constify the boot_params structure - at least from the E820 code's point of view. Remove the uapi/asm/e820/types.h file, as it's not used anymore - all kernel side E820 types are defined in asm/e820/types.h. Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-29 11:56:13 +00:00
/* We just appended a lot of ranges, sanitize the table: */
e820__update_table(e820_table);
return who;
}
/*
* Calls e820__memory_setup_default() in essence to pick up the firmware/bootloader
* E820 map - with an optional platform quirk available for virtual platforms
* to override this method of boot environment processing:
*/
void __init e820__memory_setup(void)
{
char *who;
/* This is a firmware interface ABI - make sure we don't break it: */
x86/boot/e820: Separate the E820 ABI structures from the in-kernel structures Linus pointed out that relying on the compiler to pack structures with enums is fragile not just for the kernel, but for external tooling as well which might rely on our UAPI headers. So separate the two from each other: introduce 'struct boot_e820_entry', which is the boot protocol entry format. This actually simplifies the code, as e820__update_table() is now never called directly with boot protocol table entries - we can rely on append_e820_table() and do a e820__update_table() call afterwards. ( This will allow further simplifications of __e820__update_table(), but that will be done in a separate patch. ) This change also has the side effect of not modifying the bootparams structure anymore - which might be useful for debugging. In theory we could even constify the boot_params structure - at least from the E820 code's point of view. Remove the uapi/asm/e820/types.h file, as it's not used anymore - all kernel side E820 types are defined in asm/e820/types.h. Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-29 11:56:13 +00:00
BUILD_BUG_ON(sizeof(struct boot_e820_entry) != 20);
who = x86_init.resources.memory_setup();
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
memcpy(e820_table_kexec, e820_table, sizeof(*e820_table_kexec));
x86/boot/e820: Introduce the bootloader provided e820_table_firmware[] table Add the real e820_tabel_firmware[] that will not be modified by the kernel or the EFI boot stub under any circumstance. In addition to that modify the code so that e820_table_firmwarep[] is exposed via sysfs to represent the real firmware memory layout, rather than exposing the e820_table_kexec[] table. This fixes a hibernation bug/warning, which uses e820_table_kexec[] to check RAM layout consistency across hibernation/resume: The suspend kernel: [ 0.000000] e820: update [mem 0x76671018-0x76679457] usable ==> usable The resume kernel: [ 0.000000] e820: update [mem 0x7666f018-0x76677457] usable ==> usable ... [ 15.752088] PM: Using 3 thread(s) for decompression. [ 15.752088] PM: Loading and decompressing image data (471870 pages)... [ 15.764971] Hibernate inconsistent memory map detected! [ 15.770833] PM: Image mismatch: architecture specific data Actually it is safe to restore these pages because E820_TYPE_RAM and E820_TYPE_RESERVED_KERN are treated the same during hibernation, so the original e820 table provided by the bootloader is used for hibernation MD5 fingerprint checking. The side effect is that, this newly introduced variable might increase the kernel size at compile time. Suggested-by: Ingo Molnar <mingo@redhat.com> Signed-off-by: Chen Yu <yu.c.chen@intel.com> Cc: Dave Young <dyoung@redhat.com> Cc: Len Brown <lenb@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Xunlei Pang <xlpang@redhat.com> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-07-02 17:07:32 +00:00
memcpy(e820_table_firmware, e820_table, sizeof(*e820_table_firmware));
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:13:08 +00:00
pr_info("e820: BIOS-provided physical RAM map:\n");
e820__print_table(who);
}
x86: Use memblock to replace early_res 1. replace find_e820_area with memblock_find_in_range 2. replace reserve_early with memblock_x86_reserve_range 3. replace free_early with memblock_x86_free_range. 4. NO_BOOTMEM will switch to use memblock too. 5. use _e820, _early wrap in the patch, in following patch, will replace them all 6. because memblock_x86_free_range support partial free, we can remove some special care 7. Need to make sure that memblock_find_in_range() is called after memblock_x86_fill() so adjust some calling later in setup.c::setup_arch() -- corruption_check and mptable_update -v2: Move reserve_brk() early Before fill_memblock_area, to avoid overlap between brk and memblock_find_in_range() that could happen We have more then 128 RAM entry in E820 tables, and memblock_x86_fill() could use memblock_find_in_range() to find a new place for memblock.memory.region array. and We don't need to use extend_brk() after fill_memblock_area() So move reserve_brk() early before fill_memblock_area(). -v3: Move find_smp_config early To make sure memblock_find_in_range not find wrong place, if BIOS doesn't put mptable in right place. -v4: Treat RESERVED_KERN as RAM in memblock.memory. and they are already in memblock.reserved already.. use __NOT_KEEP_MEMBLOCK to make sure memblock related code could be freed later. -v5: Generic version __memblock_find_in_range() is going from high to low, and for 32bit active_region for 32bit does include high pages need to replace the limit with memblock.default_alloc_limit, aka get_max_mapped() -v6: Use current_limit instead -v7: check with MEMBLOCK_ERROR instead of -1ULL or -1L -v8: Set memblock_can_resize early to handle EFI with more RAM entries -v9: update after kmemleak changes in mainline Suggested-by: David S. Miller <davem@davemloft.net> Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-08-25 20:39:17 +00:00
x86/boot/e820: Rename memblock_x86_fill() to e820__memblock_setup() and improve the explanations So memblock_x86_fill() is another E820 code misnomer: - nothing in its name tells us that it's part of the E820 subsystem ... - The 'fill' wording is ambiguous and doesn't tell us whether it's a single entry or some process - while the _real_ purpose of the function is hidden, which is to do a complete setup of the (platform independent) memblock regions. So rename it accordingly, to e820__memblock_setup(). Also translate this incomprehensible and misleading comment: /* * EFI may have more than 128 entries * We are safe to enable resizing, beause memblock_x86_fill() * is rather later for x86 */ memblock_allow_resize(); The worst aspect of this comment isn't even the sloppy typos, but that it casually mentions a '128' number with no explanation, which makes one lead to the assumption that this is related to the well-known limit of a maximum of 128 E820 entries passed via legacy bootloaders. But no, the _real_ meaning of 128 here is that of the memblock subsystem, which too happens to have a 128 entries limit for very early memblock regions (which is unrelated to E820), via INIT_MEMBLOCK_REGIONS ... So change the comment to a more comprehensible version: /* * The bootstrap memblock region count maximum is 128 entries * (INIT_MEMBLOCK_REGIONS), but EFI might pass us more E820 entries * than that - so allow memblock resizing. * * This is safe, because this call happens pretty late during x86 setup, * so we know about reserved memory regions already. (This is important * so that memblock resizing does no stomp over reserved areas.) */ memblock_allow_resize(); No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:37:42 +00:00
void __init e820__memblock_setup(void)
x86: Use memblock to replace early_res 1. replace find_e820_area with memblock_find_in_range 2. replace reserve_early with memblock_x86_reserve_range 3. replace free_early with memblock_x86_free_range. 4. NO_BOOTMEM will switch to use memblock too. 5. use _e820, _early wrap in the patch, in following patch, will replace them all 6. because memblock_x86_free_range support partial free, we can remove some special care 7. Need to make sure that memblock_find_in_range() is called after memblock_x86_fill() so adjust some calling later in setup.c::setup_arch() -- corruption_check and mptable_update -v2: Move reserve_brk() early Before fill_memblock_area, to avoid overlap between brk and memblock_find_in_range() that could happen We have more then 128 RAM entry in E820 tables, and memblock_x86_fill() could use memblock_find_in_range() to find a new place for memblock.memory.region array. and We don't need to use extend_brk() after fill_memblock_area() So move reserve_brk() early before fill_memblock_area(). -v3: Move find_smp_config early To make sure memblock_find_in_range not find wrong place, if BIOS doesn't put mptable in right place. -v4: Treat RESERVED_KERN as RAM in memblock.memory. and they are already in memblock.reserved already.. use __NOT_KEEP_MEMBLOCK to make sure memblock related code could be freed later. -v5: Generic version __memblock_find_in_range() is going from high to low, and for 32bit active_region for 32bit does include high pages need to replace the limit with memblock.default_alloc_limit, aka get_max_mapped() -v6: Use current_limit instead -v7: check with MEMBLOCK_ERROR instead of -1ULL or -1L -v8: Set memblock_can_resize early to handle EFI with more RAM entries -v9: update after kmemleak changes in mainline Suggested-by: David S. Miller <davem@davemloft.net> Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-08-25 20:39:17 +00:00
{
int i;
u64 end;
/*
x86/boot/e820: Rename memblock_x86_fill() to e820__memblock_setup() and improve the explanations So memblock_x86_fill() is another E820 code misnomer: - nothing in its name tells us that it's part of the E820 subsystem ... - The 'fill' wording is ambiguous and doesn't tell us whether it's a single entry or some process - while the _real_ purpose of the function is hidden, which is to do a complete setup of the (platform independent) memblock regions. So rename it accordingly, to e820__memblock_setup(). Also translate this incomprehensible and misleading comment: /* * EFI may have more than 128 entries * We are safe to enable resizing, beause memblock_x86_fill() * is rather later for x86 */ memblock_allow_resize(); The worst aspect of this comment isn't even the sloppy typos, but that it casually mentions a '128' number with no explanation, which makes one lead to the assumption that this is related to the well-known limit of a maximum of 128 E820 entries passed via legacy bootloaders. But no, the _real_ meaning of 128 here is that of the memblock subsystem, which too happens to have a 128 entries limit for very early memblock regions (which is unrelated to E820), via INIT_MEMBLOCK_REGIONS ... So change the comment to a more comprehensible version: /* * The bootstrap memblock region count maximum is 128 entries * (INIT_MEMBLOCK_REGIONS), but EFI might pass us more E820 entries * than that - so allow memblock resizing. * * This is safe, because this call happens pretty late during x86 setup, * so we know about reserved memory regions already. (This is important * so that memblock resizing does no stomp over reserved areas.) */ memblock_allow_resize(); No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:37:42 +00:00
* The bootstrap memblock region count maximum is 128 entries
* (INIT_MEMBLOCK_REGIONS), but EFI might pass us more E820 entries
* than that - so allow memblock resizing.
*
* This is safe, because this call happens pretty late during x86 setup,
* so we know about reserved memory regions already. (This is important
* so that memblock resizing does no stomp over reserved areas.)
x86: Use memblock to replace early_res 1. replace find_e820_area with memblock_find_in_range 2. replace reserve_early with memblock_x86_reserve_range 3. replace free_early with memblock_x86_free_range. 4. NO_BOOTMEM will switch to use memblock too. 5. use _e820, _early wrap in the patch, in following patch, will replace them all 6. because memblock_x86_free_range support partial free, we can remove some special care 7. Need to make sure that memblock_find_in_range() is called after memblock_x86_fill() so adjust some calling later in setup.c::setup_arch() -- corruption_check and mptable_update -v2: Move reserve_brk() early Before fill_memblock_area, to avoid overlap between brk and memblock_find_in_range() that could happen We have more then 128 RAM entry in E820 tables, and memblock_x86_fill() could use memblock_find_in_range() to find a new place for memblock.memory.region array. and We don't need to use extend_brk() after fill_memblock_area() So move reserve_brk() early before fill_memblock_area(). -v3: Move find_smp_config early To make sure memblock_find_in_range not find wrong place, if BIOS doesn't put mptable in right place. -v4: Treat RESERVED_KERN as RAM in memblock.memory. and they are already in memblock.reserved already.. use __NOT_KEEP_MEMBLOCK to make sure memblock related code could be freed later. -v5: Generic version __memblock_find_in_range() is going from high to low, and for 32bit active_region for 32bit does include high pages need to replace the limit with memblock.default_alloc_limit, aka get_max_mapped() -v6: Use current_limit instead -v7: check with MEMBLOCK_ERROR instead of -1ULL or -1L -v8: Set memblock_can_resize early to handle EFI with more RAM entries -v9: update after kmemleak changes in mainline Suggested-by: David S. Miller <davem@davemloft.net> Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-08-25 20:39:17 +00:00
*/
memblock: s/memblock_analyze()/memblock_allow_resize()/ and update users The only function of memblock_analyze() is now allowing resize of memblock region arrays. Rename it to memblock_allow_resize() and update its users. * The following users remain the same other than renaming. arm/mm/init.c::arm_memblock_init() microblaze/kernel/prom.c::early_init_devtree() powerpc/kernel/prom.c::early_init_devtree() openrisc/kernel/prom.c::early_init_devtree() sh/mm/init.c::paging_init() sparc/mm/init_64.c::paging_init() unicore32/mm/init.c::uc32_memblock_init() * In the following users, analyze was used to update total size which is no longer necessary. powerpc/kernel/machine_kexec.c::reserve_crashkernel() powerpc/kernel/prom.c::early_init_devtree() powerpc/mm/init_32.c::MMU_init() powerpc/mm/tlb_nohash.c::__early_init_mmu() powerpc/platforms/ps3/mm.c::ps3_mm_add_memory() powerpc/platforms/embedded6xx/wii.c::wii_memory_fixups() sh/kernel/machine_kexec.c::reserve_crashkernel() * x86/kernel/e820.c::memblock_x86_fill() was directly setting memblock_can_resize before populating memblock and calling analyze afterwards. Call memblock_allow_resize() before start populating. memblock_can_resize is now static inside memblock.c. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: Michal Simek <monstr@monstr.eu> Cc: Paul Mundt <lethal@linux-sh.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Guan Xuetao <gxt@mprc.pku.edu.cn> Cc: "H. Peter Anvin" <hpa@zytor.com>
2011-12-08 18:22:08 +00:00
memblock_allow_resize();
x86: Use memblock to replace early_res 1. replace find_e820_area with memblock_find_in_range 2. replace reserve_early with memblock_x86_reserve_range 3. replace free_early with memblock_x86_free_range. 4. NO_BOOTMEM will switch to use memblock too. 5. use _e820, _early wrap in the patch, in following patch, will replace them all 6. because memblock_x86_free_range support partial free, we can remove some special care 7. Need to make sure that memblock_find_in_range() is called after memblock_x86_fill() so adjust some calling later in setup.c::setup_arch() -- corruption_check and mptable_update -v2: Move reserve_brk() early Before fill_memblock_area, to avoid overlap between brk and memblock_find_in_range() that could happen We have more then 128 RAM entry in E820 tables, and memblock_x86_fill() could use memblock_find_in_range() to find a new place for memblock.memory.region array. and We don't need to use extend_brk() after fill_memblock_area() So move reserve_brk() early before fill_memblock_area(). -v3: Move find_smp_config early To make sure memblock_find_in_range not find wrong place, if BIOS doesn't put mptable in right place. -v4: Treat RESERVED_KERN as RAM in memblock.memory. and they are already in memblock.reserved already.. use __NOT_KEEP_MEMBLOCK to make sure memblock related code could be freed later. -v5: Generic version __memblock_find_in_range() is going from high to low, and for 32bit active_region for 32bit does include high pages need to replace the limit with memblock.default_alloc_limit, aka get_max_mapped() -v6: Use current_limit instead -v7: check with MEMBLOCK_ERROR instead of -1ULL or -1L -v8: Set memblock_can_resize early to handle EFI with more RAM entries -v9: update after kmemleak changes in mainline Suggested-by: David S. Miller <davem@davemloft.net> Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-08-25 20:39:17 +00:00
for (i = 0; i < e820_table->nr_entries; i++) {
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
struct e820_entry *entry = &e820_table->entries[i];
x86: Use memblock to replace early_res 1. replace find_e820_area with memblock_find_in_range 2. replace reserve_early with memblock_x86_reserve_range 3. replace free_early with memblock_x86_free_range. 4. NO_BOOTMEM will switch to use memblock too. 5. use _e820, _early wrap in the patch, in following patch, will replace them all 6. because memblock_x86_free_range support partial free, we can remove some special care 7. Need to make sure that memblock_find_in_range() is called after memblock_x86_fill() so adjust some calling later in setup.c::setup_arch() -- corruption_check and mptable_update -v2: Move reserve_brk() early Before fill_memblock_area, to avoid overlap between brk and memblock_find_in_range() that could happen We have more then 128 RAM entry in E820 tables, and memblock_x86_fill() could use memblock_find_in_range() to find a new place for memblock.memory.region array. and We don't need to use extend_brk() after fill_memblock_area() So move reserve_brk() early before fill_memblock_area(). -v3: Move find_smp_config early To make sure memblock_find_in_range not find wrong place, if BIOS doesn't put mptable in right place. -v4: Treat RESERVED_KERN as RAM in memblock.memory. and they are already in memblock.reserved already.. use __NOT_KEEP_MEMBLOCK to make sure memblock related code could be freed later. -v5: Generic version __memblock_find_in_range() is going from high to low, and for 32bit active_region for 32bit does include high pages need to replace the limit with memblock.default_alloc_limit, aka get_max_mapped() -v6: Use current_limit instead -v7: check with MEMBLOCK_ERROR instead of -1ULL or -1L -v8: Set memblock_can_resize early to handle EFI with more RAM entries -v9: update after kmemleak changes in mainline Suggested-by: David S. Miller <davem@davemloft.net> Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-08-25 20:39:17 +00:00
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
end = entry->addr + entry->size;
x86: Use memblock to replace early_res 1. replace find_e820_area with memblock_find_in_range 2. replace reserve_early with memblock_x86_reserve_range 3. replace free_early with memblock_x86_free_range. 4. NO_BOOTMEM will switch to use memblock too. 5. use _e820, _early wrap in the patch, in following patch, will replace them all 6. because memblock_x86_free_range support partial free, we can remove some special care 7. Need to make sure that memblock_find_in_range() is called after memblock_x86_fill() so adjust some calling later in setup.c::setup_arch() -- corruption_check and mptable_update -v2: Move reserve_brk() early Before fill_memblock_area, to avoid overlap between brk and memblock_find_in_range() that could happen We have more then 128 RAM entry in E820 tables, and memblock_x86_fill() could use memblock_find_in_range() to find a new place for memblock.memory.region array. and We don't need to use extend_brk() after fill_memblock_area() So move reserve_brk() early before fill_memblock_area(). -v3: Move find_smp_config early To make sure memblock_find_in_range not find wrong place, if BIOS doesn't put mptable in right place. -v4: Treat RESERVED_KERN as RAM in memblock.memory. and they are already in memblock.reserved already.. use __NOT_KEEP_MEMBLOCK to make sure memblock related code could be freed later. -v5: Generic version __memblock_find_in_range() is going from high to low, and for 32bit active_region for 32bit does include high pages need to replace the limit with memblock.default_alloc_limit, aka get_max_mapped() -v6: Use current_limit instead -v7: check with MEMBLOCK_ERROR instead of -1ULL or -1L -v8: Set memblock_can_resize early to handle EFI with more RAM entries -v9: update after kmemleak changes in mainline Suggested-by: David S. Miller <davem@davemloft.net> Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-08-25 20:39:17 +00:00
if (end != (resource_size_t)end)
continue;
if (entry->type != E820_TYPE_RAM && entry->type != E820_TYPE_RESERVED_KERN)
x86: Use memblock to replace early_res 1. replace find_e820_area with memblock_find_in_range 2. replace reserve_early with memblock_x86_reserve_range 3. replace free_early with memblock_x86_free_range. 4. NO_BOOTMEM will switch to use memblock too. 5. use _e820, _early wrap in the patch, in following patch, will replace them all 6. because memblock_x86_free_range support partial free, we can remove some special care 7. Need to make sure that memblock_find_in_range() is called after memblock_x86_fill() so adjust some calling later in setup.c::setup_arch() -- corruption_check and mptable_update -v2: Move reserve_brk() early Before fill_memblock_area, to avoid overlap between brk and memblock_find_in_range() that could happen We have more then 128 RAM entry in E820 tables, and memblock_x86_fill() could use memblock_find_in_range() to find a new place for memblock.memory.region array. and We don't need to use extend_brk() after fill_memblock_area() So move reserve_brk() early before fill_memblock_area(). -v3: Move find_smp_config early To make sure memblock_find_in_range not find wrong place, if BIOS doesn't put mptable in right place. -v4: Treat RESERVED_KERN as RAM in memblock.memory. and they are already in memblock.reserved already.. use __NOT_KEEP_MEMBLOCK to make sure memblock related code could be freed later. -v5: Generic version __memblock_find_in_range() is going from high to low, and for 32bit active_region for 32bit does include high pages need to replace the limit with memblock.default_alloc_limit, aka get_max_mapped() -v6: Use current_limit instead -v7: check with MEMBLOCK_ERROR instead of -1ULL or -1L -v8: Set memblock_can_resize early to handle EFI with more RAM entries -v9: update after kmemleak changes in mainline Suggested-by: David S. Miller <davem@davemloft.net> Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-08-25 20:39:17 +00:00
continue;
x86/boot/e820: Consolidate 'struct e820_entry *entry' local variable names So the E820 code has a lot of cases of: struct e820_entry *ei; ... but the 'ei' name makes very little sense if you think about it, it's not an abbreviation of anything obviously related to E820 table entries. This results in weird looking lines such as: if (type && ei->type != type) where you might have to double check what 'ei' really means, plus weird looking secondary variable names, such as: u64 ei_end; The 'ei' name was introduced in a single function over a decade ago, and then mindlessly cargo-copied over into other functions - with usage growing to over 60 uses altogether (!). ( My best guess is that it might have been originally meant as abbreviation of 'entry interval'. ) Anyway, rename these to the much more obvious: struct e820_entry *entry; No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 11:16:17 +00:00
memblock_add(entry->addr, entry->size);
x86: Use memblock to replace early_res 1. replace find_e820_area with memblock_find_in_range 2. replace reserve_early with memblock_x86_reserve_range 3. replace free_early with memblock_x86_free_range. 4. NO_BOOTMEM will switch to use memblock too. 5. use _e820, _early wrap in the patch, in following patch, will replace them all 6. because memblock_x86_free_range support partial free, we can remove some special care 7. Need to make sure that memblock_find_in_range() is called after memblock_x86_fill() so adjust some calling later in setup.c::setup_arch() -- corruption_check and mptable_update -v2: Move reserve_brk() early Before fill_memblock_area, to avoid overlap between brk and memblock_find_in_range() that could happen We have more then 128 RAM entry in E820 tables, and memblock_x86_fill() could use memblock_find_in_range() to find a new place for memblock.memory.region array. and We don't need to use extend_brk() after fill_memblock_area() So move reserve_brk() early before fill_memblock_area(). -v3: Move find_smp_config early To make sure memblock_find_in_range not find wrong place, if BIOS doesn't put mptable in right place. -v4: Treat RESERVED_KERN as RAM in memblock.memory. and they are already in memblock.reserved already.. use __NOT_KEEP_MEMBLOCK to make sure memblock related code could be freed later. -v5: Generic version __memblock_find_in_range() is going from high to low, and for 32bit active_region for 32bit does include high pages need to replace the limit with memblock.default_alloc_limit, aka get_max_mapped() -v6: Use current_limit instead -v7: check with MEMBLOCK_ERROR instead of -1ULL or -1L -v8: Set memblock_can_resize early to handle EFI with more RAM entries -v9: update after kmemleak changes in mainline Suggested-by: David S. Miller <davem@davemloft.net> Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-08-25 20:39:17 +00:00
}
x86/boot/e820: Rename memblock_x86_fill() to e820__memblock_setup() and improve the explanations So memblock_x86_fill() is another E820 code misnomer: - nothing in its name tells us that it's part of the E820 subsystem ... - The 'fill' wording is ambiguous and doesn't tell us whether it's a single entry or some process - while the _real_ purpose of the function is hidden, which is to do a complete setup of the (platform independent) memblock regions. So rename it accordingly, to e820__memblock_setup(). Also translate this incomprehensible and misleading comment: /* * EFI may have more than 128 entries * We are safe to enable resizing, beause memblock_x86_fill() * is rather later for x86 */ memblock_allow_resize(); The worst aspect of this comment isn't even the sloppy typos, but that it casually mentions a '128' number with no explanation, which makes one lead to the assumption that this is related to the well-known limit of a maximum of 128 E820 entries passed via legacy bootloaders. But no, the _real_ meaning of 128 here is that of the memblock subsystem, which too happens to have a 128 entries limit for very early memblock regions (which is unrelated to E820), via INIT_MEMBLOCK_REGIONS ... So change the comment to a more comprehensible version: /* * The bootstrap memblock region count maximum is 128 entries * (INIT_MEMBLOCK_REGIONS), but EFI might pass us more E820 entries * than that - so allow memblock resizing. * * This is safe, because this call happens pretty late during x86 setup, * so we know about reserved memory regions already. (This is important * so that memblock resizing does no stomp over reserved areas.) */ memblock_allow_resize(); No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:37:42 +00:00
/* Throw away partial pages: */
memblock_trim_memory(PAGE_SIZE);
x86: Use memblock to replace early_res 1. replace find_e820_area with memblock_find_in_range 2. replace reserve_early with memblock_x86_reserve_range 3. replace free_early with memblock_x86_free_range. 4. NO_BOOTMEM will switch to use memblock too. 5. use _e820, _early wrap in the patch, in following patch, will replace them all 6. because memblock_x86_free_range support partial free, we can remove some special care 7. Need to make sure that memblock_find_in_range() is called after memblock_x86_fill() so adjust some calling later in setup.c::setup_arch() -- corruption_check and mptable_update -v2: Move reserve_brk() early Before fill_memblock_area, to avoid overlap between brk and memblock_find_in_range() that could happen We have more then 128 RAM entry in E820 tables, and memblock_x86_fill() could use memblock_find_in_range() to find a new place for memblock.memory.region array. and We don't need to use extend_brk() after fill_memblock_area() So move reserve_brk() early before fill_memblock_area(). -v3: Move find_smp_config early To make sure memblock_find_in_range not find wrong place, if BIOS doesn't put mptable in right place. -v4: Treat RESERVED_KERN as RAM in memblock.memory. and they are already in memblock.reserved already.. use __NOT_KEEP_MEMBLOCK to make sure memblock related code could be freed later. -v5: Generic version __memblock_find_in_range() is going from high to low, and for 32bit active_region for 32bit does include high pages need to replace the limit with memblock.default_alloc_limit, aka get_max_mapped() -v6: Use current_limit instead -v7: check with MEMBLOCK_ERROR instead of -1ULL or -1L -v8: Set memblock_can_resize early to handle EFI with more RAM entries -v9: update after kmemleak changes in mainline Suggested-by: David S. Miller <davem@davemloft.net> Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-08-25 20:39:17 +00:00
memblock_dump_all();
}