linux-kernel - [PATCH] perf_events: update Intel Westmere event constraints

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Date:	Thu, 10 Jun 2010 13:25:01 +0200
From:	Stephane Eranian <eranian@...gle.com>
To:	linux-kernel@...r.kernel.org
Cc:	peterz@...radead.org, mingo@...e.hu, paulus@...ba.org,
	davem@...emloft.net, fweisbec@...il.com,
	perfmon2-devel@...ts.sf.net, eranian@...il.com, eranian@...gle.com
Subject: [PATCH] perf_events: update Intel Westmere event constraints

Based on Intel Vol3b (March 2010), the event SNOOPQ_REQUEST_OUTSTANDING
is restricted to counters 0,1 so update the event table for Intel Westmere
accordingly.

Signed-off-by: Stephane Eranian <eranian@...gle.com>

diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c
index fdbc652..1f51d7f 100644
--- a/arch/x86/kernel/cpu/perf_event_intel.c
+++ b/arch/x86/kernel/cpu/perf_event_intel.c
@@ -72,6 +72,7 @@ static struct event_constraint intel_westmere_event_constraints[] =
 	INTEL_EVENT_CONSTRAINT(0x51, 0x3), /* L1D */
 	INTEL_EVENT_CONSTRAINT(0x60, 0x1), /* OFFCORE_REQUESTS_OUTSTANDING */
 	INTEL_EVENT_CONSTRAINT(0x63, 0x3), /* CACHE_LOCK_CYCLES */
+        INTEL_EVENT_CONSTRAINT(0xb3, 0x1), /* SNOOPQ_REQUEST_OUTSTANDING */
 	EVENT_CONSTRAINT_END
 };
 
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