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6727ad9e20
linux-next/arch/powerpc/kernel
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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
..
vdso32 powerpc/vdso: Fix build rules to rebuild vdsos correctly 2016-08-10 23:04:12 +10:00
vdso64 powerpc/vdso: Fix build rules to rebuild vdsos correctly 2016-08-10 23:04:12 +10:00
.gitignore
align.c powerpc: Move cpu_has_feature() to a separate file 2016-08-01 11:15:03 +10:00
asm-offsets.c KVM: PPC: Book3S: Treat VTB as a per-subcore register, not per-thread 2016-09-27 14:41:39 +10:00
audit.c
btext.c powerpc/mm: Use a helper for finding pte bits mapping I/O area 2016-05-01 18:32:32 +10:00
cacheinfo.c powerpc: Fix missing L2 cache size in /sys/devices/system/cpu 2015-04-11 20:49:28 +10:00
cacheinfo.h
compat_audit.c
cpu_setup_6xx.S powerpc: Various typo fixes 2016-06-14 13:58:26 +10:00
cpu_setup_44x.S
cpu_setup_fsl_booke.S powerpc/cache: add cache flush operation for various e500 2016-03-04 23:44:51 -06:00
cpu_setup_pa6t.S
cpu_setup_power.S powerpc/irq: Add support for HV virtualization interrupts 2016-07-17 16:42:44 +10:00
cpu_setup_ppc970.S
cputable.c powerpc: Add option to use jump label for mmu_has_feature() 2016-08-01 11:15:06 +10:00
crash_dump.c powerpc: Remove superfluous bootmem includes 2014-11-10 09:59:26 +11:00
crash.c powerpc/crash: Rearrange loop condition to avoid out of bounds array access 2016-07-14 20:26:22 +10:00
dbell.c powerpc/powernv: Fixes for hypervisor doorbell handling 2015-03-20 14:51:53 +11:00
dma-iommu.c dma-mapping: use unsigned long for dma_attrs 2016-08-04 08:50:07 -04:00
dma-swiotlb.c powerpc/iommu: Support "hybrid" iommu/direct DMA ops for coherent_mask < dma_mask 2015-07-13 10:10:55 +10:00
dma.c dma-mapping: use unsigned long for dma_attrs 2016-08-04 08:50:07 -04:00
eeh_cache.c powerpc/eeh: Fix pr_debug()s in eeh_cache.c 2016-07-08 22:09:50 +10:00
eeh_dev.c powerpc/pci: Delay populating pdn 2016-06-21 15:30:56 +10:00
eeh_driver.c powerpc fixes for 4.7 #5 2016-07-15 14:57:47 +10:00
eeh_event.c powerpc: sparse: static-ify some things 2016-04-12 21:05:18 +10:00
eeh_pe.c powerpc/eeh: fix misleading indentation 2016-04-27 09:19:37 +10:00
eeh_sysfs.c powerpc/eeh: Fix PE state format 2014-11-27 09:32:58 +11:00
eeh.c powerpc/eeh: Switch to conventional PCI address output in EEH log 2016-08-09 16:52:03 +10:00
entry_32.S powerpc32: provide VIRT_CPU_ACCOUNTING 2016-07-09 01:43:50 -05:00
entry_64.S powerpc/tm: do not use r13 for tabort_syscall 2016-08-29 12:47:56 +10:00
epapr_hcalls.S
epapr_paravirt.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2014-06-10 18:54:22 -07:00
exceptions-64e.S powerpc32: provide VIRT_CPU_ACCOUNTING 2016-07-09 01:43:50 -05:00
exceptions-64s.S powerpc/pseries: PACA save area fix for MCE vs MCE 2016-08-22 11:09:33 +10:00
fadump.c powerpc: implement arch_reserved_kernel_pages 2016-10-07 18:46:28 -07:00
firmware.c
fpu.S powerpc: Add the ability to save FPU without giving it up 2016-03-02 23:34:49 +11:00
fsl_booke_entry_mapping.S powerpc/fsl: Force coherent memory on e500mc derivatives 2015-08-07 23:00:01 -05:00
ftrace.c ftrace: Add return address pointer to ftrace_ret_stack 2016-08-24 12:15:14 +02:00
head_8xx.S powerpc/8xx: add CONFIG_PIN_TLB_IMMR 2016-07-09 02:02:48 -05:00
head_32.S
head_40x.S powerpc: Remove check for CONFIG_SERIAL_TEXT_DEBUG 2014-06-11 16:31:21 +10:00
head_44x.S powerpc: Fix misspellings in comments. 2016-03-01 19:27:20 +11:00
head_64.S powerpc/64: Move the content of setup_system() to setup_arch() 2016-07-21 19:14:29 +10:00
head_booke.h
head_fsl_booke.S powerpc/cache: add cache flush operation for various e500 2016-03-04 23:44:51 -06:00
hw_breakpoint.c powerpc/hw_breakpoint: Fix oops when destroying hw_breakpoint event 2016-03-03 22:06:08 +11:00
ibmebus.c dma-mapping: use unsigned long for dma_attrs 2016-08-04 08:50:07 -04:00
idle_6xx.S
idle_book3e.S powerpc: No need to use dot symbols when branching to a function 2014-04-23 10:05:16 +10:00
idle_book3s.S powerpc/powernv: Fix restore of SPRs upon wake up from hypervisor state loss 2016-09-12 12:45:50 +10:00
idle_e500.S powerpc/e500mc: Remove dead L2 flushing code in idle_e500.S 2015-06-02 21:37:19 -05:00
idle_power4.S powerpc: No need to use dot symbols when branching to a function 2014-04-23 10:05:16 +10:00
idle.c
io-workarounds.c powerpc/mm: Differentiate between hugetlb and THP during page walk 2015-10-12 15:30:09 +11:00
io.c
iomap.c powerpc: add io{read,write}64 accessors 2016-05-31 16:41:52 +08:00
iommu.c dma-mapping: use unsigned long for dma_attrs 2016-08-04 08:50:07 -04:00
irq.c powerpc: Move cpu_has_feature() to a separate file 2016-08-01 11:15:03 +10:00
isa-bridge.c powerpc/mm: Use a helper for finding pte bits mapping I/O area 2016-05-01 18:32:32 +10:00
jump_label.c jump_label: Rename JUMP_LABEL_{EN,DIS}ABLE to JUMP_LABEL_{JMP,NOP} 2015-08-03 11:34:12 +02:00
kgdb.c powerpc: Fix kgdb on little endian ppc64le 2016-02-18 00:03:26 +11:00
kprobes.c powerpc: migrate exception table users off module.h and onto extable.h 2016-08-22 11:09:33 +10:00
kvm_emul.S
kvm.c powerpc: Remove redundant breaks 2015-08-06 15:10:20 +10:00
l2cr_6xx.S
legacy_serial.c powerpc: make of_device_ids const 2014-09-25 23:14:46 +10:00
machine_kexec_32.c
machine_kexec_64.c powerpc/mm: Move hash table ops to a separate structure 2016-07-21 18:59:09 +10:00
machine_kexec.c powerpc: Update of_remove_property() call sites to remove null checking 2016-05-11 21:54:04 +10:00
Makefile powerpc: move hmi.c to arch/powerpc/kvm/ 2016-09-09 16:18:07 +10:00
mce_power.c powerpc/mm/radix: Fix CONFIG_PPC_MMU_STD_64 typo 2016-05-11 21:53:59 +10:00
mce.c powerpc/book3s: Fix MCE console messages for unrecoverable MCE. 2016-08-09 19:46:54 +10:00
misc_32.S powerpc/32: Get rid of sub_reloc_offset() 2016-06-14 13:58:26 +10:00
misc_64.S powerpc/mm: Move hash table ops to a separate structure 2016-07-21 18:59:09 +10:00
misc.S powerpc: Rename __get_SP() to current_stack_pointer() 2014-10-15 11:23:20 +11:00
module_32.c powerpc/module: Only try to generate the ftrace_caller() stub once 2016-03-07 14:53:53 +11:00
module_64.c powerpc/modules: Never restore r2 for a mprofile-kernel style mcount() call 2016-07-21 20:10:42 +10:00
module.c powerpc/module: Only try to generate the ftrace_caller() stub once 2016-03-07 14:53:53 +11:00
msi.c powerpc: Remove MSI-related PCI controller ops from ppc_md 2015-06-02 11:47:45 +10:00
nvram_64.c pstore: add lzo/lz4 compression support 2016-06-02 10:59:31 -07:00
of_platform.c powerpc/eeh: Do probe on pci_dn 2015-03-24 13:15:52 +11:00
paca.c powerpc/mm: Convert early cpu/mmu feature check to use the new helpers 2016-08-01 11:15:01 +10:00
pci_32.c powerpc: Remove more traces of bootmem 2014-11-19 21:41:51 +11:00
pci_64.c powerpc fixes for 4.7 #5 2016-07-15 14:57:47 +10:00
pci_dn.c powerpc/pci: Fix build with PCI_IOV=y and EEH=n 2016-07-07 16:33:27 +10:00
pci_of_scan.c PCI/MSI: Initialize MSI capability for all architectures 2015-11-24 17:45:18 -06:00
pci-common.c powerpc/pseries: use pci_host_bridge.release_fn() to kfree(phb) 2016-08-22 11:09:33 +10:00
pci-hotplug.c powerpc/pci: Don't scan empty slot 2016-05-11 21:54:26 +10:00
pmc.c
ppc32.h
ppc_ksyms_32.c powerpc32: Remove clear_pages() and define clear_page() inline 2016-03-11 17:20:11 -06:00
ppc_ksyms.c powerpc32: move xxxxx_dcache_range() functions inline 2016-03-11 17:20:12 -06:00
ppc_save_regs.S
proc_powerpc.c
process.c powerpc/ptrace: Fix coredump since ptrace TM changes 2016-08-10 16:34:20 +10:00
prom_init_check.sh powerpc: Simplify symbol check in prom_init_check.sh 2014-09-25 23:14:46 +10:00
prom_init.c powerpc/prom: Fix sub-processor option passed to ibm, client-architecture-support 2016-08-22 11:09:33 +10:00
prom_parse.c
prom.c powerpc/mm: Make MMU_FTR_RADIX a MMU family feature 2016-08-01 11:14:57 +10:00
ptrace32.c
ptrace.c powerpc/ptrace: Fix coredump since ptrace TM changes 2016-08-10 16:34:20 +10:00
reloc_32.S
reloc_64.S powerpc: Align p_dyn, p_rela and p_st symbols 2014-03-07 13:50:19 +11:00
rtas_flash.c powerpc: Fix endianness of flash_block_list in rtas_flash 2014-07-28 11:30:54 +10:00
rtas_pci.c powerpc: move find_and_init_phbs() to pSeries specific code 2015-04-11 20:49:09 +10:00
rtas-proc.c powerpc: Various typo fixes 2016-06-14 13:58:26 +10:00
rtas-rtc.c
rtas.c powerpc: Make ppc_md.{halt, restart} __noreturn 2016-07-14 21:12:06 +10:00
rtasd.c powerpc/pseries: start rtasd before PCI probing 2016-07-08 19:22:15 +10:00
setup_32.c powerpc/32: Fix crash during static key init 2016-08-10 19:41:58 +10:00
setup_64.c powerpc/32: Fix crash during static key init 2016-08-10 19:41:58 +10:00
setup-common.c powerpc: Move cpu_has_feature() to a separate file 2016-08-01 11:15:03 +10:00
setup.h powerpc: Merge 32-bit and 64-bit setup_arch() 2016-07-21 19:17:46 +10:00
signal_32.c powerpc: signals: Discard transaction state from signal frames 2016-08-29 12:48:40 +10:00
signal_64.c powerpc: signals: Discard transaction state from signal frames 2016-08-29 12:48:40 +10:00
signal.c powerpc: Fix misspellings in comments. 2016-03-01 19:27:20 +11:00
signal.h powerpc: Fix misspellings in comments. 2016-03-01 19:27:20 +11:00
smp-tbsync.c powerpc: Delete non-required instances of include <linux/init.h> 2014-01-15 13:46:44 +11:00
smp.c powerpc, hotplug: Avoid to touch non-existent cpumasks. 2016-08-22 11:09:33 +10:00
stacktrace.c powerpc: Implement save_stack_trace_regs() to enable kprobe stack tracing 2016-01-11 14:27:28 +11:00
suspend.c nosave: consolidate __nosave_{begin,end} in <asm/sections.h> 2014-10-09 22:26:04 -04:00
swsusp_32.S
swsusp_64.c
swsusp_asm64.S powerpc: Only save/restore SDR1 if in hypervisor mode 2013-10-31 12:37:29 +11:00
swsusp_booke.S powerpc/fsl-booke: Use SPRN_SPRGn rather than mfsprg/mtsprg 2014-01-07 19:06:03 -06:00
swsusp.c powerpc/mm: Abstraction for switch_mmu_context() 2016-05-01 18:33:04 +10:00
sys_ppc32.c
syscalls.c powerpc: Add a proper syscall for switching endianness 2015-03-28 22:03:40 +11:00
sysfs.c powerpc/sparse: make some things static 2016-06-16 22:23:11 +10:00
systbl_chk.c powerpc: Standardise on NR_syscalls rather than __NR_syscalls. 2015-11-26 22:11:17 +11:00
systbl_chk.sh powerpc: Standardise on NR_syscalls rather than __NR_syscalls. 2015-11-26 22:11:17 +11:00
systbl.S powerpc: Add a proper syscall for switching endianness 2015-03-28 22:03:40 +11:00
tau_6xx.c
time.c RTC for 4.8 2016-08-05 09:48:22 -04:00
tm.S powerpc/tm: Fix stack pointer corruption in __tm_recheckpoint() 2016-07-15 15:00:18 +10:00
trace_clock.c powerpc/ftrace: add powerpc timebase as a trace clock source 2015-08-06 16:36:23 +10:00
traps.c powerpc: migrate exception table users off module.h and onto extable.h 2016-08-22 11:09:33 +10:00
udbg_16550.c powerpc: Fix bad NULL pointer check in udbg_uart_getc_poll() 2014-11-12 13:47:20 +11:00
udbg.c powerpc: Remove the celleb support 2015-04-07 17:15:13 +10:00
uprobes.c uprobes/powerpc: Kill arch_uprobe->ainsn 2013-11-20 16:31:01 +01:00
vdso.c powerpc/vdso: Add missing include file 2016-08-09 16:52:00 +10:00
vecemu.c
vector.S powerpc: Improve comment explaining why we modify VRSAVE 2016-07-26 14:16:19 +10:00
vio.c dma-mapping: use unsigned long for dma_attrs 2016-08-04 08:50:07 -04:00
vmlinux.lds.S nmi_backtrace: generate one-line reports for idle cpus 2016-10-07 18:46:30 -07:00