diff options
Diffstat (limited to 'arch/x86/kernel/cpu/perf_event_intel_ds.c')
| -rw-r--r-- | arch/x86/kernel/cpu/perf_event_intel_ds.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/x86/kernel/cpu/perf_event_intel_ds.c b/arch/x86/kernel/cpu/perf_event_intel_ds.c index 41a7d21a098f..2d4e76ba2b5c 100644 --- a/arch/x86/kernel/cpu/perf_event_intel_ds.c +++ b/arch/x86/kernel/cpu/perf_event_intel_ds.c @@ -739,8 +739,10 @@ 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; - init_debug_store_on_cpu(smp_processor_id()); + wrmsrl(MSR_IA32_DS_AREA, (unsigned long)ds); } |