perf/x86/intel: Reset more state in PMU reset

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The PMU reset code didn't quite keep up with newer PMU features.
Improve it a bit to really reset a modern PMU:

  - Clear all overflow status
  - Clear LBRs and freezing state
  - Disable fixed counters too

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: eranian@google.com
Link: http://lkml.kernel.org/r/1425059312-18217-2-git-send-email-andi@firstfloor.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

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Andi Kleen 2015-02-27 09:48:30 -08:00 • committed by Ingo Molnar

parent b37609c30e

commit 8882edf735

1 changed files with 12 additions and 0 deletions

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arch/x86/kernel/cpu/perf_event_intel.c

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