12df216c61
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>
52 lines
1.7 KiB
C
52 lines
1.7 KiB
C
#ifndef _ASM_E820_API_H
|
|
#define _ASM_E820_API_H
|
|
|
|
#include <asm/e820/types.h>
|
|
|
|
extern struct e820_table *e820_table;
|
|
extern struct e820_table *e820_table_kexec;
|
|
extern struct e820_table *e820_table_firmware;
|
|
|
|
extern unsigned long pci_mem_start;
|
|
|
|
extern bool e820__mapped_any(u64 start, u64 end, enum e820_type type);
|
|
extern bool e820__mapped_all(u64 start, u64 end, enum e820_type type);
|
|
|
|
extern void e820__range_add (u64 start, u64 size, enum e820_type type);
|
|
extern u64 e820__range_update(u64 start, u64 size, enum e820_type old_type, enum e820_type new_type);
|
|
extern u64 e820__range_remove(u64 start, u64 size, enum e820_type old_type, bool check_type);
|
|
|
|
extern void e820__print_table(char *who);
|
|
extern int e820__update_table(struct e820_table *table);
|
|
extern void e820__update_table_print(void);
|
|
|
|
extern unsigned long e820__end_of_ram_pfn(void);
|
|
extern unsigned long e820__end_of_low_ram_pfn(void);
|
|
|
|
extern u64 e820__memblock_alloc_reserved(u64 size, u64 align);
|
|
extern void e820__memblock_setup(void);
|
|
|
|
extern void e820__reserve_setup_data(void);
|
|
extern void e820__finish_early_params(void);
|
|
extern void e820__reserve_resources(void);
|
|
extern void e820__reserve_resources_late(void);
|
|
|
|
extern void e820__memory_setup(void);
|
|
extern void e820__memory_setup_extended(u64 phys_addr, u32 data_len);
|
|
extern char *e820__memory_setup_default(void);
|
|
extern void e820__setup_pci_gap(void);
|
|
|
|
extern void e820__reallocate_tables(void);
|
|
extern void e820__register_nosave_regions(unsigned long limit_pfn);
|
|
|
|
/*
|
|
* Returns true iff the specified range [start,end) is completely contained inside
|
|
* the ISA region.
|
|
*/
|
|
static inline bool is_ISA_range(u64 start, u64 end)
|
|
{
|
|
return start >= ISA_START_ADDRESS && end <= ISA_END_ADDRESS;
|
|
}
|
|
|
|
#endif /* _ASM_E820_API_H */
|