perf/x86: Add a microcode revision check for SNB-PEBS

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Recent Intel microcode resolved the SNB-PEBS issues, so conditionally
enable PEBS on SNB hardware depending on the microcode revision.

Thanks to Stephane for figuring out the various microcode revisions.

Suggested-by: Stephane Eranian <eranian@google.com>
Acked-by: Borislav Petkov <borislav.petkov@amd.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/n/tip-v3672ziwh9damwqwh1uz3krm@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

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This commit is contained in:

Peter Zijlstra 2012-06-08 14:50:50 +02:00 • committed by Ingo Molnar

parent f285f92f7e

commit c93dc84cbe

5 changed files with 74 additions and 14 deletions

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2

arch/x86/include/asm/perf_event.h

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21

arch/x86/kernel/cpu/perf_event.c

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arch/x86/kernel/cpu/perf_event.h

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51

arch/x86/kernel/cpu/perf_event_intel.c

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10

arch/x86/kernel/microcode_core.c

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