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Commit 983433b5 authored by Stephane Eranian's avatar Stephane Eranian Committed by Ingo Molnar
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perf/x86: Disable PEBS-LL in intel_pmu_pebs_disable() 



Make sure intel_pmu_pebs_disable() and intel_pmu_pebs_enable()
are symmetrical w.r.t. PEBS-LL and precise store.

Signed-off-by: default avatarStephane Eranian <eranian@google.com>
Signed-off-by: default avatarPeter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1371824448-7306-2-git-send-email-eranian@google.com


Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 2f7f73a5

arch/x86/kernel/cpu/perf_event_intel_ds.c

+6 −0
Original line number Diff line number Diff line
@@ -653,6 +653,12 @@ void intel_pmu_pebs_disable(struct perf_event *event) 
	struct hw_perf_event *hwc = &event->hw;



	cpuc->pebs_enabled &= ~(1ULL << hwc->idx);



	if (event->hw.constraint->flags & PERF_X86_EVENT_PEBS_LDLAT)

		cpuc->pebs_enabled &= ~(1ULL << (hwc->idx + 32));

	else if (event->hw.constraint->flags & PERF_X86_EVENT_PEBS_ST)

		cpuc->pebs_enabled &= ~(1ULL << 63);



	if (cpuc->enabled)

		wrmsrl(MSR_IA32_PEBS_ENABLE, cpuc->pebs_enabled);