diff options
| author | Wolfgang Wiedmeyer <wolfgit@wiedmeyer.de> | 2015-10-22 21:26:58 +0200 |
|---|---|---|
| committer | Wolfgang Wiedmeyer <wolfgit@wiedmeyer.de> | 2015-10-22 21:26:58 +0200 |
| commit | 786208aedd8f75b0720e36b2ca66b3a411417301 (patch) | |
| tree | e6e902ab383ca94842c8691a9e28e1a6aefc5695 /arch/x86/kernel/cpu/perf_event_intel_ds.c | |
| parent | b99374450c03bf5081b88995d91d34fb9b2fd040 (diff) | |
| download | kernel_samsung_smdk4412-786208aedd8f75b0720e36b2ca66b3a411417301.zip kernel_samsung_smdk4412-786208aedd8f75b0720e36b2ca66b3a411417301.tar.gz kernel_samsung_smdk4412-786208aedd8f75b0720e36b2ca66b3a411417301.tar.bz2 | |
merged 3.0.101 tag
Diffstat (limited to 'arch/x86/kernel/cpu/perf_event_intel_ds.c')
| -rw-r--r-- | arch/x86/kernel/cpu/perf_event_intel_ds.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/perf_event_intel_ds.c b/arch/x86/kernel/cpu/perf_event_intel_ds.c index d812fe2..c81d1f8 100644 --- a/arch/x86/kernel/cpu/perf_event_intel_ds.c +++ b/arch/x86/kernel/cpu/perf_event_intel_ds.c @@ -754,6 +754,16 @@ static void intel_ds_init(void) } } +void perf_restore_debug_store(void) +{ + struct debug_store *ds = __this_cpu_read(cpu_hw_events.ds); + + if (!x86_pmu.bts && !x86_pmu.pebs) + return; + + wrmsrl(MSR_IA32_DS_AREA, (unsigned long)ds); +} + #else /* CONFIG_CPU_SUP_INTEL */ static void reserve_ds_buffers(void) |