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76cb2c617f
linux/arch/x86/kernel/cpu
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Yan, Zheng 76cb2c617f perf/x86/intel: Save/restore LBR stack during context switch 
When the LBR call stack is enabled, it is necessary to save/restore
the LBR stack on context switch. The solution is saving/restoring
the LBR stack to/from task's perf event context.

The LBR stack is saved/restored only when there are events that use
the LBR call stack. If no event uses LBR call stack, the LBR stack
is reset when task is scheduled in.

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Signed-off-by: Kan Liang <kan.liang@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: eranian@google.com
Cc: jolsa@redhat.com
Link: http://lkml.kernel.org/r/1415156173-10035-10-git-send-email-kan.liang@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-02-18 17:16:10 +01:00
..
mcheck x86: Clean up cr4 manipulation 2015-02-04 12:10:41 +01:00
microcode x86/microcode/intel: Fish out the stashed microcode for the BSP 2014-12-10 11:36:28 +01:00
mtrr x86: Store a per-cpu shadow copy of CR4 2015-02-04 12:10:42 +01:00
.gitignore
amd.c Merge branch 'perf/hw_breakpoints' into perf/core 2015-01-28 15:48:59 +01:00
bugs_64.c
bugs.c
centaur.c x86: Remove CONFIG_X86_OOSTORE 2014-03-11 10:16:18 -07:00
common.c x86: Store a per-cpu shadow copy of CR4 2015-02-04 12:10:42 +01:00
cpu.h x86/cpu: Track legacy CPU model data only on 32-bit kernels 2013-10-26 13:34:39 +02:00
cyrix.c x86: Delete non-required instances of include <linux/init.h> 2014-01-06 21:25:18 -08:00
hypervisor.c x86: Correctly detect hypervisor 2013-08-05 06:35:33 -07:00
intel_cacheinfo.c arch/x86: replace strict_strto calls 2014-08-08 15:57:28 -07:00
intel.c x86: Don't enable F00F workaround on Intel Quark processors 2014-10-29 08:52:09 +01:00
Makefile x86/build: Clean auto-generated processor feature files 2014-12-23 15:37:06 +01:00
match.c x86: align x86 arch with generic CPU modalias handling 2014-02-18 12:45:38 -08:00
mkcapflags.sh x86: Fix mkcapflags.sh bash-ism 2014-12-23 15:34:57 +01:00
mshyperv.c x86, hyperv: Mark the Hyper-V clocksource as being continuous 2015-01-20 14:36:25 +01:00
perf_event_amd_ibs.c perf/x86/amd/ibs: Convert force_ibs_eilvt_setup() to void 2015-02-18 17:01:46 +01:00
perf_event_amd_iommu.c cpumask: factor out show_cpumap into separate helper function 2014-11-07 11:45:00 -08:00
perf_event_amd_iommu.h
perf_event_amd_uncore.c cpumask: factor out show_cpumap into separate helper function 2014-11-07 11:45:00 -08:00
perf_event_amd.c x86: Replace __get_cpu_var uses 2014-08-26 13:45:49 -04:00
perf_event_intel_ds.c perf/x86/intel: Fix bug for "cycles:p" and "cycles:pp" on SLM 2015-01-16 09:06:59 +01:00
perf_event_intel_lbr.c perf/x86/intel: Save/restore LBR stack during context switch 2015-02-18 17:16:10 +01:00
perf_event_intel_rapl.c perf/rapl: Fix crash in rapl_scale() 2015-01-28 13:04:35 +01:00
perf_event_intel_uncore_nhmex.c perf/x86/uncore: Fix coccinelle warnings 2014-08-13 07:51:09 +02:00
perf_event_intel_uncore_snb.c perf/x86/intel/uncore: Update support for client uncore IMC PMU 2014-09-24 14:48:25 +02:00
perf_event_intel_uncore_snbep.c perf/x86/intel/uncore: Delete an unnecessary check before pci_dev_put() call 2015-02-18 17:01:42 +01:00
perf_event_intel_uncore.c perf/x86/intel/uncore: Move uncore_box_init() out of driver initialization 2015-01-28 13:04:34 +01:00
perf_event_intel_uncore.h perf/x86/intel/uncore: Move uncore_box_init() out of driver initialization 2015-01-28 13:04:34 +01:00
perf_event_intel.c perf/x86/intel: Add basic Haswell LBR call stack support 2015-02-18 17:16:04 +01:00
perf_event_knc.c x86: Replace __get_cpu_var uses 2014-08-26 13:45:49 -04:00
perf_event_p4.c x86: Replace __get_cpu_var uses 2014-08-26 13:45:49 -04:00
perf_event_p6.c perf/x86/intel/p6: Add userspace RDPMC quirk for PPro 2014-02-09 13:08:24 +01:00
perf_event.c perf/x86/intel: Allocate space for storing LBR stack 2015-02-18 17:16:08 +01:00
perf_event.h perf/x86/intel: Allocate space for storing LBR stack 2015-02-18 17:16:08 +01:00
perfctr-watchdog.c
powerflags.c
proc.c x86: Replace seq_printf() with seq_puts() 2014-12-08 11:48:15 +01:00
rdrand.c x86, rdrand: When nordrand is specified, disable RDSEED as well 2014-05-11 20:25:20 -07:00
scattered.c x86: Add support for Intel HWP feature detection. 2014-11-12 00:04:37 +01:00
topology.c x86: delete __cpuinit usage from all x86 files 2013-07-14 19:36:56 -04:00
transmeta.c x86: Delete non-required instances of include <linux/init.h> 2014-01-06 21:25:18 -08:00
umc.c x86: Delete non-required instances of include <linux/init.h> 2014-01-06 21:25:18 -08:00
vmware.c x86: Correctly detect hypervisor 2013-08-05 06:35:33 -07:00