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Commit 6a600a8b authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
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perf, x86: Disable PEBS on SandyBridge chips 



Cc: Stephane Eranian <eranian@google.com>
Cc: stable@kernel.org
Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 4a1dba72

arch/x86/kernel/cpu/perf_event_intel.c

+8 −0
Original line number Diff line number Diff line
@@ -1545,6 +1545,13 @@ static void intel_clovertown_quirks(void) 
	x86_pmu.pebs_constraints = NULL;

}



static void intel_sandybridge_quirks(void)

{

	printk(KERN_WARNING "PEBS disabled due to CPU errata.\n");

	x86_pmu.pebs = 0;

	x86_pmu.pebs_constraints = NULL;

}



__init int intel_pmu_init(void)

{

	union cpuid10_edx edx;
@@ -1694,6 +1701,7 @@ __init int intel_pmu_init(void) 
		break;



	case 42: /* SandyBridge */

		x86_pmu.quirks = intel_sandybridge_quirks;

	case 45: /* SandyBridge, "Romely-EP" */

		memcpy(hw_cache_event_ids, snb_hw_cache_event_ids,

		       sizeof(hw_cache_event_ids));