linux/arch/blackfin/kernel/vmlinux.lds.S
Chris Metcalf 6727ad9e20 nmi_backtrace: generate one-line reports for idle cpus
When doing an nmi backtrace of many cores, most of which are idle, the
output is a little overwhelming and very uninformative.  Suppress
messages for cpus that are idling when they are interrupted and just
emit one line, "NMI backtrace for N skipped: idling at pc 0xNNN".

We do this by grouping all the cpuidle code together into a new
.cpuidle.text section, and then checking the address of the interrupted
PC to see if it lies within that section.

This commit suitably tags x86 and tile idle routines, and only adds in
the minimal framework for other architectures.

Link: http://lkml.kernel.org/r/1472487169-14923-5-git-send-email-cmetcalf@mellanox.com
Signed-off-by: Chris Metcalf <cmetcalf@mellanox.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Daniel Thompson <daniel.thompson@linaro.org> [arm]
Tested-by: Petr Mladek <pmladek@suse.com>
Cc: Aaron Tomlin <atomlin@redhat.com>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-10-07 18:46:30 -07:00

270 lines
4.8 KiB
ArmAsm

/*
* Copyright 2004-2009 Analog Devices Inc.
*
* Licensed under the GPL-2 or later
*/
#include <asm-generic/vmlinux.lds.h>
#include <asm/mem_map.h>
#include <asm/page.h>
#include <asm/thread_info.h>
OUTPUT_FORMAT("elf32-bfin")
ENTRY(__start)
_jiffies = _jiffies_64;
SECTIONS
{
#ifdef CONFIG_RAMKERNEL
. = CONFIG_BOOT_LOAD;
#else
. = CONFIG_ROM_BASE;
#endif
/* Neither the text, ro_data or bss section need to be aligned
* So pack them back to back
*/
.text :
{
__text = .;
_text = .;
__stext = .;
TEXT_TEXT
#ifndef CONFIG_SCHEDULE_L1
SCHED_TEXT
#endif
CPUIDLE_TEXT
LOCK_TEXT
IRQENTRY_TEXT
SOFTIRQENTRY_TEXT
KPROBES_TEXT
#ifdef CONFIG_ROMKERNEL
__sinittext = .;
INIT_TEXT
__einittext = .;
EXIT_TEXT
#endif
*(.text.*)
*(.fixup)
#if !L1_CODE_LENGTH
*(.l1.text)
#endif
__etext = .;
}
EXCEPTION_TABLE(4)
NOTES
/* Just in case the first read only is a 32-bit access */
RO_DATA(4)
__rodata_end = .;
#ifdef CONFIG_ROMKERNEL
. = CONFIG_BOOT_LOAD;
.bss : AT(__rodata_end)
#else
.bss :
#endif
{
. = ALIGN(4);
___bss_start = .;
*(.bss .bss.*)
*(COMMON)
#if !L1_DATA_A_LENGTH
*(.l1.bss)
#endif
#if !L1_DATA_B_LENGTH
*(.l1.bss.B)
#endif
. = ALIGN(4);
___bss_stop = .;
}
#if defined(CONFIG_ROMKERNEL)
.data : AT(LOADADDR(.bss) + SIZEOF(.bss))
#else
.data :
#endif
{
__sdata = .;
/* This gets done first, so the glob doesn't suck it in */
CACHELINE_ALIGNED_DATA(32)
#if !L1_DATA_A_LENGTH
. = ALIGN(32);
*(.data_l1.cacheline_aligned)
*(.l1.data)
#endif
#if !L1_DATA_B_LENGTH
*(.l1.data.B)
#endif
#if !L2_LENGTH
. = ALIGN(32);
*(.data_l2.cacheline_aligned)
*(.l2.data)
#endif
DATA_DATA
CONSTRUCTORS
INIT_TASK_DATA(THREAD_SIZE)
__edata = .;
}
__data_lma = LOADADDR(.data);
__data_len = SIZEOF(.data);
/* The init section should be last, so when we free it, it goes into
* the general memory pool, and (hopefully) will decrease fragmentation
* a tiny bit. The init section has a _requirement_ that it be
* PAGE_SIZE aligned
*/
. = ALIGN(PAGE_SIZE);
___init_begin = .;
#ifdef CONFIG_RAMKERNEL
INIT_TEXT_SECTION(PAGE_SIZE)
/* We have to discard exit text and such at runtime, not link time, to
* handle embedded cross-section references (alt instructions, bug
* table, eh_frame, etc...). We need all of our .text up front and
* .data after it for PCREL call issues.
*/
.exit.text :
{
EXIT_TEXT
}
. = ALIGN(16);
INIT_DATA_SECTION(16)
PERCPU_SECTION(32)
.exit.data :
{
EXIT_DATA
}
.text_l1 L1_CODE_START : AT(LOADADDR(.exit.data) + SIZEOF(.exit.data))
#else
.init.data : AT(__data_lma + __data_len + 32)
{
__sinitdata = .;
INIT_DATA
INIT_SETUP(16)
INIT_CALLS
CON_INITCALL
SECURITY_INITCALL
INIT_RAM_FS
. = ALIGN(PAGE_SIZE);
___per_cpu_load = .;
PERCPU_INPUT(32)
EXIT_DATA
__einitdata = .;
}
__init_data_lma = LOADADDR(.init.data);
__init_data_len = SIZEOF(.init.data);
__init_data_end = .;
.text_l1 L1_CODE_START : AT(__init_data_lma + __init_data_len)
#endif
{
. = ALIGN(4);
__stext_l1 = .;
*(.l1.text.head)
*(.l1.text)
#ifdef CONFIG_SCHEDULE_L1
SCHED_TEXT
#endif
. = ALIGN(4);
__etext_l1 = .;
}
__text_l1_lma = LOADADDR(.text_l1);
__text_l1_len = SIZEOF(.text_l1);
ASSERT (__text_l1_len <= L1_CODE_LENGTH, "L1 text overflow!")
.data_l1 L1_DATA_A_START : AT(__text_l1_lma + __text_l1_len)
{
. = ALIGN(4);
__sdata_l1 = .;
*(.l1.data)
__edata_l1 = .;
. = ALIGN(32);
*(.data_l1.cacheline_aligned)
. = ALIGN(4);
__sbss_l1 = .;
*(.l1.bss)
. = ALIGN(4);
__ebss_l1 = .;
}
__data_l1_lma = LOADADDR(.data_l1);
__data_l1_len = SIZEOF(.data_l1);
ASSERT (__data_l1_len <= L1_DATA_A_LENGTH, "L1 data A overflow!")
.data_b_l1 L1_DATA_B_START : AT(__data_l1_lma + __data_l1_len)
{
. = ALIGN(4);
__sdata_b_l1 = .;
*(.l1.data.B)
__edata_b_l1 = .;
. = ALIGN(4);
__sbss_b_l1 = .;
*(.l1.bss.B)
. = ALIGN(4);
__ebss_b_l1 = .;
}
__data_b_l1_lma = LOADADDR(.data_b_l1);
__data_b_l1_len = SIZEOF(.data_b_l1);
ASSERT (__data_b_l1_len <= L1_DATA_B_LENGTH, "L1 data B overflow!")
.text_data_l2 L2_START : AT(__data_b_l1_lma + __data_b_l1_len)
{
. = ALIGN(4);
__stext_l2 = .;
*(.l2.text)
. = ALIGN(4);
__etext_l2 = .;
. = ALIGN(4);
__sdata_l2 = .;
*(.l2.data)
__edata_l2 = .;
. = ALIGN(32);
*(.data_l2.cacheline_aligned)
. = ALIGN(4);
__sbss_l2 = .;
*(.l2.bss)
. = ALIGN(4);
__ebss_l2 = .;
}
__l2_lma = LOADADDR(.text_data_l2);
__l2_len = SIZEOF(.text_data_l2);
ASSERT (__l2_len <= L2_LENGTH, "L2 overflow!")
/* Force trailing alignment of our init section so that when we
* free our init memory, we don't leave behind a partial page.
*/
#ifdef CONFIG_RAMKERNEL
. = __l2_lma + __l2_len;
#else
. = __init_data_end;
#endif
. = ALIGN(PAGE_SIZE);
___init_end = .;
__end =.;
STABS_DEBUG
DWARF_DEBUG
DISCARDS
}