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9eff26ea48bfbe2885b158742a7512a097ec911b
linux/arch/powerpc/kernel
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Paul Mackerras 9eff26ea48 powerpc/perf_events: Fix call-graph recording, add perf_arch_fetch_caller_regs 
This implements a powerpc version of perf_arch_fetch_caller_regs
to get correct call-graphs.

It's implemented in assembly because that way we can be sure there isn't
a stack frame for perf_arch_fetch_caller_regs.  If it was in C, gcc might
or might not create a stack frame for it, which would affect the number
of levels we have to skip.

With this, we see results from perf record -e lock:lock_acquire like
this:

 # Samples: 24878
 #
 # Overhead         Command      Shared Object  Symbol
 # ........  ..............  .................  ......
 #
    14.99%            perf  [kernel.kallsyms]  [k] ._raw_spin_lock
                      |
                      --- ._raw_spin_lock
                         |
                         |--25.00%-- .alloc_fd
                         |          (nil)
                         |          |
                         |          |--50.00%-- .anon_inode_getfd
                         |          |          .sys_perf_event_open
                         |          |          syscall_exit
                         |          |          syscall
                         |          |          create_counter
                         |          |          __cmd_record
                         |          |          run_builtin
                         |          |          main
                         |          |          0xfd2e704
                         |          |          0xfd2e8c0
                         |          |          (nil)

... etc.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: anton@samba.org
Cc: linuxppc-dev@ozlabs.org
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <20100318050513.GA6575@drongo>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-03-18 06:48:29 +01:00
..
vdso32
powerpc: Fix segment mapping in vdso32
2009-10-27 16:42:40 +11:00
vdso64
Use macros for .data.page_aligned section.
2009-09-21 06:27:08 +02:00
.gitignore
powerpc: Ignore generated vmlinux.lds in git
2008-10-07 14:26:18 +11:00
align.c
powerpc: Handle VSX alignment faults correctly in little-endian mode
2009-12-18 14:55:43 +11:00
asm-offsets.c
KVM: PPC: Keep SRR1 flags around in shadow_msr
2010-03-01 12:35:56 -03:00
audit.c
…
btext.c
powerpc: Use the common ascii hex helpers
2008-08-20 16:34:57 +10:00
cacheinfo.c
Driver core: Constify struct sysfs_ops in struct kobj_type
2010-03-07 17:04:49 -08:00
cacheinfo.h
powerpc: Rewrite sysfs processor cache info code
2009-01-08 16:25:10 +11:00
clock.c
[POWERPC] clk.h interface for platforms
2007-10-03 09:11:56 +10:00
compat_audit.c
…
cpu_setup_6xx.S
powerpc: Use names rather than numbers for SPRGs (v2)
2009-08-20 10:12:27 +10:00
cpu_setup_44x.S
AMCC PPC 460SX redwood SoC platform initial framework
2009-02-14 14:41:29 -05:00
cpu_setup_fsl_booke.S
powerpc/fsl-booke: Enable L1 cache on e500v1/e500v2/e500mc CPUs
2009-06-15 21:45:30 -05:00
cpu_setup_pa6t.S
…
cpu_setup_ppc970.S
powerpc: Use LOAD_REG_IMMEDIATE only for constants on 64-bit
2008-09-15 11:08:35 -07:00
cputable.c
powerpc: broadway processor support
2009-12-12 22:24:29 -07:00
crash_dump.c
powerpc: Unify opcode definitions and support
2009-02-23 10:48:56 +11:00
crash.c
powerpc: Remove get_irq_desc()
2009-10-30 17:20:55 +11:00
dbell.c
powerpc: Add support for using doorbells for SMP IPI
2009-02-23 15:53:03 +11:00
dma-iommu.c
powerpc: Change archdata dma_data to a union
2009-09-24 15:31:43 +10:00
dma-swiotlb.c
powerpc: Kill unused swiotlb variable
2009-11-24 17:00:24 +11:00
dma.c
powerpc: Rename get_dma_direct_offset get_dma_offset
2009-09-24 15:31:43 +10:00
entry_32.S
powerpc: Use names rather than numbers for SPRGs (v2)
2009-08-20 10:12:27 +10:00
entry_64.S
powerpc: Clear MSR_RI during RTAS calls
2010-02-09 13:56:24 +11:00
exceptions-64e.S
powerpc/book3e-64: Remove duplicated #include
2009-09-24 15:31:41 +10:00
exceptions-64s.S
Merge commit 'origin/master' into next
2009-12-09 17:14:38 +11:00
firmware.c
powerpc: Make powerpc_firmware_features __read_mostly
2010-02-09 13:56:07 +11:00
fpu.S
powerpc: Use names rather than numbers for SPRGs (v2)
2009-08-20 10:12:27 +10:00
ftrace.c
Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-06-20 10:56:46 -07:00
head_8xx.S
powerpc/8xx: Fix user space TLB walk in dcbX fixup
2010-01-15 13:26:16 +11:00
head_32.S
powerpc: gamecube/wii: early debugging using usbgecko
2009-12-12 22:24:31 -07:00
head_40x.S
powerpc: Use names rather than numbers for SPRGs (v2)
2009-08-20 10:12:27 +10:00
head_44x.S
powerpc/mm: Cleanup handling of execute permission
2009-08-27 13:12:51 +10:00
head_64.S
Make head_64.S aware of KVM real mode code
2009-11-05 16:49:57 +11:00
head_booke.h
powerpc: Use names rather than numbers for SPRGs (v2)
2009-08-20 10:12:27 +10:00
head_fsl_booke.S
powerpc/fsl-booke: replace a hardcoded constant
2010-02-17 21:10:25 -06:00
ibmebus.c
powerpc: use dma_map_ops struct
2009-08-28 14:24:10 +10:00
idle_6xx.S
powerpc: Fix for getting CPU number in power_save_ppc32_restore()
2008-09-03 20:53:47 +10:00
idle_e500.S
powerpc: Fix for getting CPU number in power_save_ppc32_restore()
2008-09-03 20:53:47 +10:00
idle_power4.S
…
idle.c
sysctl: Drop & in front of every proc_handler.
2009-11-18 08:37:40 -08:00
init_task.c
Use new __init_task_data macro in arch init_task.c files.
2009-09-21 06:27:08 +02:00
io.c
powerpc: tiny memcpy_(to|from)io optimisation
2009-11-04 16:43:12 -07:00
iomap.c
[POWERPC] Add 64-bit resources support to pci_iomap
2007-09-20 07:36:52 -05:00
iommu.c
iommu-helper: use bitmap library
2009-12-16 07:20:18 -08:00
irq.c
powerpc: Convert big_irq_lock to raw_spinlock
2010-02-19 14:52:32 +11:00
isa-bridge.c
[POWERPC] Remove leftover printk in isa-bridge.c
2008-05-09 20:22:59 +10:00
kgdb.c
powerpc/booke: Introduce new CONFIG options for advanced debug registers
2010-02-17 14:03:16 +11:00
kprobes.c
powerpc/booke: Introduce new CONFIG options for advanced debug registers
2010-02-17 14:03:16 +11:00
l2cr_6xx.S
Convert files to UTF-8 and some cleanups
2007-10-19 23:21:04 +02:00
legacy_serial.c
powerpc/powermac: Fixup default serial port device for pmac_zilog
2008-07-28 16:30:53 +10:00
lparcfg.c
powerpc: Remove trailing space in messages
2010-02-09 13:56:23 +11:00
machine_kexec_32.c
kexec jump: rename KEXEC_CONTROL_CODE_SIZE to KEXEC_CONTROL_PAGE_SIZE
2008-08-15 08:35:42 -07:00
machine_kexec_64.c
Use new __init_task_data macro in arch init_task.c files.
2009-09-21 06:27:08 +02:00
machine_kexec.c
powerpc: Allow mem=x cmdline to work with 4G+
2009-05-15 16:43:41 +10:00
Makefile
powerpc/chrp: Use the same RTAS daemon as pSeries
2009-10-30 17:20:53 +11:00
misc_32.S
powerpc/8xx: Start using dcbX instructions in various copy routines
2009-12-09 17:10:37 +11:00
misc_64.S
powerpc: Move VMX and VSX asm code to vector.S
2009-06-09 16:46:25 +10:00
misc.S
powerpc/perf_events: Fix call-graph recording, add perf_arch_fetch_caller_regs
2010-03-18 06:48:29 +01:00
module_32.c
powerpc/ppc32: ftrace, dynamic ftrace to handle modules
2008-11-20 10:52:53 -08:00
module_64.c
powerpc: Unify opcode definitions and support
2009-02-23 10:48:56 +11:00
module.c
module: cleanup FIXME comments about trimming exception table entries.
2009-06-12 21:47:05 +09:30
mpc7450-pmu.c
perf: Do the big rename: Performance Counters -> Performance Events
2009-09-21 14:28:04 +02:00
msi.c
powerpc/PCI: include pci.h in powerpc MSI implementation
2009-03-25 08:54:29 -07:00
nvram_64.c
arch/powerpc: Fix continuation line formats
2010-02-09 13:55:05 +11:00
of_device.c
powerpc/of: Fix usage of dev_set_name() in of_device_alloc()
2009-06-26 16:55:35 +10:00
of_platform.c
of: unify phandle name in struct device_node
2010-01-28 14:06:53 -07:00
paca.c
powerpc: Add PACA fields specific to 64-bit Book3E processors
2009-08-20 10:25:08 +10:00
pci_32.c
powerpc/pci: Merge ppc32 and ppc64 versions of phb_scan()
2009-09-02 15:45:53 +10:00
pci_64.c
of: add 'of_' prefix to machine_is_compatible()
2010-02-09 08:33:00 -07:00
pci_dn.c
powerpc/pci: Move pseries code into pseries platform specific area
2009-05-21 15:44:24 +10:00
pci_of_scan.c
powerpc: Remove trailing space in messages
2010-02-09 13:56:23 +11:00
pci-common.c
PCI: add pci_bus_for_each_resource(), remove direct bus->resource[] refs
2010-02-23 09:43:31 -08:00
perf_callchain.c
perf: Fix inconsistency between IP and callchain sampling
2010-01-28 14:31:20 +01:00
perf_event.c
perf, ppc: Fix compile error due to new cpu notifiers
2010-03-11 15:21:27 +01:00
pmc.c
powerpc: Convert pmc_owner_lock to raw_spinlock
2010-02-19 14:52:33 +11:00
power4-pmu.c
perf: Do the big rename: Performance Counters -> Performance Events
2009-09-21 14:28:04 +02:00
power5-pmu.c
powerpc: perf_event: Enable SDAR in continous sample mode
2009-10-28 16:13:02 +11:00
power5+-pmu.c
powerpc: perf_event: Enable SDAR in continous sample mode
2009-10-28 16:13:02 +11:00
power6-pmu.c
powerpc: perf_event: Enable SDAR in continous sample mode
2009-10-28 16:13:02 +11:00
power7-pmu.c
powerpc: perf_event: Enable SDAR in continous sample mode
2009-10-28 16:13:02 +11:00
ppc32.h
powerpc: Add VSX context save/restore, ptrace and signal support
2008-07-01 11:28:50 +10:00
ppc970-pmu.c
powerpc: perf_event: Enable SDAR in continous sample mode
2009-10-28 16:13:02 +11:00
ppc_ksyms.c
KVM: PPC: Export __giveup_vsx
2010-03-01 12:35:52 -03:00
ppc_save_regs.S
powerpc: Prepare xmon_save_regs for use with kdump
2008-12-23 15:13:28 +11:00
proc_powerpc.c
powerpc: Move /proc/ppc64 to /proc/powerpc and add symlink
2009-10-30 17:20:53 +11:00
process.c
powerpc/booke: Add support for advanced debug registers
2010-02-17 14:03:17 +11:00
prom_init_check.sh
powerpc: Print linux_banner in prom_init
2009-03-11 17:11:33 +11:00
prom_init.c
powerpc/pseries: Pass more accurate number of supported cores to firmware
2010-02-04 14:33:54 +11:00
prom_parse.c
powerpc: Fix of_node_put() exit path in of_irq_map_one()
2009-04-20 12:18:43 -06:00
prom.c
of: move definition of of_chosen into common code.
2010-02-14 07:13:55 -07:00
ptrace32.c
headers: smp_lock.h redux
2009-07-12 12:22:34 -07:00
ptrace.c
powerpc/booke: Add support for advanced debug registers
2010-02-17 14:03:17 +11:00
reloc_64.S
powerpc: Make the 64-bit kernel as a position-independent executable
2008-09-15 11:08:38 -07:00
rtas_flash.c
powerpc: Move /proc/ppc64 to /proc/powerpc and add symlink
2009-10-30 17:20:53 +11:00
rtas_pci.c
powerpc/pci: Clean up direct access to sysdata by RTAS
2009-05-21 15:44:23 +10:00
rtas-proc.c
powerpc: Move /proc/ppc64 to /proc/powerpc update
2010-01-15 13:26:17 +11:00
rtas-rtc.c
…
rtas.c
locking: Convert __raw_spin* functions to arch_spin*
2009-12-14 23:55:32 +01:00
rtasd.c
powerpc/chrp: Use the same RTAS daemon as pSeries
2009-10-30 17:20:53 +11:00
setup_32.c
swiotlb: Defer swiotlb init printing, export swiotlb_print_info()
2009-11-10 12:32:00 +01:00
setup_64.c
Merge commit 'origin/master' into next
2009-12-09 17:14:38 +11:00
setup-common.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
2009-12-14 09:58:24 -08:00
setup.h
…
signal_32.c
powerpc/booke: Add support for advanced debug registers
2010-02-17 14:03:17 +11:00
signal_64.c
powerpc: Sanitize stack pointer in signal handling code
2009-03-27 16:58:24 +11:00
signal.c
powerpc/booke: Add support for advanced debug registers
2010-02-17 14:03:17 +11:00
signal.h
powerpc: Sanitize stack pointer in signal handling code
2009-03-27 16:58:24 +11:00
smp-tbsync.c
powerpc: Silence software timebase sync
2008-11-05 22:08:28 +11:00
smp.c
powerpc: Move cpu hotplug driver lock from pseries to powerpc
2010-01-15 13:26:18 +11:00
softemu8xx.c
Remove asm/a.out.h files for all architectures without a.out support.
2008-09-06 19:30:24 +01:00
stacktrace.c
powerpc: Removed duplicated include in stacktrace.c
2008-07-28 16:30:47 +10:00
suspend.c
PAGE_ALIGN(): correctly handle 64-bit values on 32-bit architectures
2008-07-24 10:47:21 -07:00
swsusp_32.S
powerpc/swsusp_32: Fix TLB invalidation
2010-01-15 13:20:07 +11:00
swsusp_64.c
…
swsusp_asm64.S
powerpc: Fix 64-bit hibernation with 64k pages
2008-10-07 14:26:20 +11:00
swsusp.c
powerpc/mm: Split mmu_context handling
2008-12-21 14:21:15 +11:00
sys_ppc32.c
sysctl: Introduce a generic compat sysctl sysctl
2009-11-06 03:52:55 -08:00
syscalls.c
Unify sys_mmap*
2009-12-11 06:44:29 -05:00
sysfs.c
sysfs/cpu: Add probe/release files
2009-12-09 17:09:33 +11:00
systbl_chk.c
[POWERPC] Fix a couple of copyright symbols
2008-01-25 22:52:50 +11:00
systbl_chk.sh
[POWERPC] Fix a couple of copyright symbols
2008-01-25 22:52:50 +11:00
systbl.S
[POWERPC] Align the sys_call_table
2007-10-11 14:36:47 +10:00
tau_6xx.c
tree-wide: fix assorted typos all over the place
2009-12-04 15:39:55 +01:00
time.c
powerpc: Add timer, performance monitor and machine check counts to /proc/interrupts
2010-02-17 14:02:49 +11:00
traps.c
powerpc: Convert die.lock to raw_spinlock
2010-02-19 14:52:33 +11:00
udbg_16550.c
trivial: fix typo "for for" in multiple files
2009-09-21 15:14:54 +02:00
udbg.c
powerpc: gamecube/wii: early debugging using usbgecko
2009-12-12 22:24:31 -07:00
vdso.c
tree-wide: fix a very frequent spelling mistake
2009-11-09 09:40:54 +01:00
vecemu.c
…
vector.S
powerpc: Fix usage of 64-bit instruction in 32-bit altivec code
2009-12-09 18:10:12 +11:00
vio.c
powerpc: Change archdata dma_data to a union
2009-09-24 15:31:43 +10:00
vmlinux.lds.S
module: handle ppc64 relocating kcrctabs when CONFIG_RELOCATABLE=y
2009-12-15 16:28:34 +10:30