forked from Minki/linux
6727ad9e20
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>
229 lines
4.4 KiB
ArmAsm
229 lines
4.4 KiB
ArmAsm
|
|
#include <asm/cache.h>
|
|
#include <asm/ptrace.h>
|
|
#include <asm/pgtable.h>
|
|
|
|
#include <asm-generic/vmlinux.lds.h>
|
|
|
|
OUTPUT_FORMAT("elf64-ia64-little")
|
|
OUTPUT_ARCH(ia64)
|
|
ENTRY(phys_start)
|
|
jiffies = jiffies_64;
|
|
|
|
PHDRS {
|
|
code PT_LOAD;
|
|
percpu PT_LOAD;
|
|
data PT_LOAD;
|
|
note PT_NOTE;
|
|
unwind 0x70000001; /* PT_IA_64_UNWIND, but ld doesn't match the name */
|
|
}
|
|
|
|
SECTIONS {
|
|
/*
|
|
* unwind exit sections must be discarded before
|
|
* the rest of the sections get included.
|
|
*/
|
|
/DISCARD/ : {
|
|
*(.IA_64.unwind.exit.text)
|
|
*(.IA_64.unwind_info.exit.text)
|
|
*(.comment)
|
|
*(.note)
|
|
}
|
|
|
|
v = PAGE_OFFSET; /* this symbol is here to make debugging easier... */
|
|
phys_start = _start - LOAD_OFFSET;
|
|
|
|
code : {
|
|
} :code
|
|
. = KERNEL_START;
|
|
|
|
_text = .;
|
|
_stext = .;
|
|
|
|
.text : AT(ADDR(.text) - LOAD_OFFSET) {
|
|
__start_ivt_text = .;
|
|
*(.text..ivt)
|
|
__end_ivt_text = .;
|
|
TEXT_TEXT
|
|
SCHED_TEXT
|
|
CPUIDLE_TEXT
|
|
LOCK_TEXT
|
|
KPROBES_TEXT
|
|
*(.gnu.linkonce.t*)
|
|
}
|
|
|
|
.text2 : AT(ADDR(.text2) - LOAD_OFFSET) {
|
|
*(.text2)
|
|
}
|
|
|
|
#ifdef CONFIG_SMP
|
|
.text..lock : AT(ADDR(.text..lock) - LOAD_OFFSET) {
|
|
*(.text..lock)
|
|
}
|
|
#endif
|
|
_etext = .;
|
|
|
|
/*
|
|
* Read-only data
|
|
*/
|
|
NOTES :code :note /* put .notes in text and mark in PT_NOTE */
|
|
code_continues : {
|
|
} : code /* switch back to regular program... */
|
|
|
|
EXCEPTION_TABLE(16)
|
|
|
|
/* MCA table */
|
|
. = ALIGN(16);
|
|
__mca_table : AT(ADDR(__mca_table) - LOAD_OFFSET) {
|
|
__start___mca_table = .;
|
|
*(__mca_table)
|
|
__stop___mca_table = .;
|
|
}
|
|
|
|
.data..patch.phys_stack_reg : AT(ADDR(.data..patch.phys_stack_reg) - LOAD_OFFSET) {
|
|
__start___phys_stack_reg_patchlist = .;
|
|
*(.data..patch.phys_stack_reg)
|
|
__end___phys_stack_reg_patchlist = .;
|
|
}
|
|
|
|
/*
|
|
* Global data
|
|
*/
|
|
_data = .;
|
|
|
|
/* Unwind info & table: */
|
|
. = ALIGN(8);
|
|
.IA_64.unwind_info : AT(ADDR(.IA_64.unwind_info) - LOAD_OFFSET) {
|
|
*(.IA_64.unwind_info*)
|
|
}
|
|
.IA_64.unwind : AT(ADDR(.IA_64.unwind) - LOAD_OFFSET) {
|
|
__start_unwind = .;
|
|
*(.IA_64.unwind*)
|
|
__end_unwind = .;
|
|
} :code :unwind
|
|
code_continues2 : {
|
|
} : code
|
|
|
|
RODATA
|
|
|
|
.opd : AT(ADDR(.opd) - LOAD_OFFSET) {
|
|
*(.opd)
|
|
}
|
|
|
|
/*
|
|
* Initialization code and data:
|
|
*/
|
|
. = ALIGN(PAGE_SIZE);
|
|
__init_begin = .;
|
|
|
|
INIT_TEXT_SECTION(PAGE_SIZE)
|
|
INIT_DATA_SECTION(16)
|
|
|
|
.data..patch.vtop : AT(ADDR(.data..patch.vtop) - LOAD_OFFSET) {
|
|
__start___vtop_patchlist = .;
|
|
*(.data..patch.vtop)
|
|
__end___vtop_patchlist = .;
|
|
}
|
|
|
|
.data..patch.rse : AT(ADDR(.data..patch.rse) - LOAD_OFFSET) {
|
|
__start___rse_patchlist = .;
|
|
*(.data..patch.rse)
|
|
__end___rse_patchlist = .;
|
|
}
|
|
|
|
.data..patch.mckinley_e9 : AT(ADDR(.data..patch.mckinley_e9) - LOAD_OFFSET) {
|
|
__start___mckinley_e9_bundles = .;
|
|
*(.data..patch.mckinley_e9)
|
|
__end___mckinley_e9_bundles = .;
|
|
}
|
|
|
|
#if defined(CONFIG_IA64_GENERIC)
|
|
/* Machine Vector */
|
|
. = ALIGN(16);
|
|
.machvec : AT(ADDR(.machvec) - LOAD_OFFSET) {
|
|
machvec_start = .;
|
|
*(.machvec)
|
|
machvec_end = .;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_SMP
|
|
. = ALIGN(PERCPU_PAGE_SIZE);
|
|
__cpu0_per_cpu = .;
|
|
. = . + PERCPU_PAGE_SIZE; /* cpu0 per-cpu space */
|
|
#endif
|
|
|
|
. = ALIGN(PAGE_SIZE);
|
|
__init_end = .;
|
|
|
|
.data..page_aligned : AT(ADDR(.data..page_aligned) - LOAD_OFFSET) {
|
|
PAGE_ALIGNED_DATA(PAGE_SIZE)
|
|
. = ALIGN(PAGE_SIZE);
|
|
__start_gate_section = .;
|
|
*(.data..gate)
|
|
__stop_gate_section = .;
|
|
}
|
|
/*
|
|
* make sure the gate page doesn't expose
|
|
* kernel data
|
|
*/
|
|
. = ALIGN(PAGE_SIZE);
|
|
|
|
/* Per-cpu data: */
|
|
. = ALIGN(PERCPU_PAGE_SIZE);
|
|
PERCPU_VADDR(SMP_CACHE_BYTES, PERCPU_ADDR, :percpu)
|
|
__phys_per_cpu_start = __per_cpu_load;
|
|
/*
|
|
* ensure percpu data fits
|
|
* into percpu page size
|
|
*/
|
|
. = __phys_per_cpu_start + PERCPU_PAGE_SIZE;
|
|
|
|
data : {
|
|
} :data
|
|
.data : AT(ADDR(.data) - LOAD_OFFSET) {
|
|
_sdata = .;
|
|
INIT_TASK_DATA(PAGE_SIZE)
|
|
CACHELINE_ALIGNED_DATA(SMP_CACHE_BYTES)
|
|
READ_MOSTLY_DATA(SMP_CACHE_BYTES)
|
|
DATA_DATA
|
|
*(.data1)
|
|
*(.gnu.linkonce.d*)
|
|
CONSTRUCTORS
|
|
}
|
|
|
|
. = ALIGN(16); /* gp must be 16-byte aligned for exc. table */
|
|
.got : AT(ADDR(.got) - LOAD_OFFSET) {
|
|
*(.got.plt)
|
|
*(.got)
|
|
}
|
|
__gp = ADDR(.got) + 0x200000;
|
|
|
|
/*
|
|
* We want the small data sections together,
|
|
* so single-instruction offsets can access
|
|
* them all, and initialized data all before
|
|
* uninitialized, so we can shorten the
|
|
* on-disk segment size.
|
|
*/
|
|
.sdata : AT(ADDR(.sdata) - LOAD_OFFSET) {
|
|
*(.sdata)
|
|
*(.sdata1)
|
|
*(.srdata)
|
|
}
|
|
_edata = .;
|
|
|
|
BSS_SECTION(0, 0, 0)
|
|
|
|
_end = .;
|
|
|
|
code : {
|
|
} :code
|
|
|
|
STABS_DEBUG
|
|
DWARF_DEBUG
|
|
|
|
/* Default discards */
|
|
DISCARDS
|
|
}
|