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perf events: Enable raw event support for Intel unhalted_reference_cycles event

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This patch adds the encoding and definitions necessary for the
unhalted_reference_cycles event avaialble since Intel Core 2 processors.

Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1323559734-3488-2-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Stephane Eranian
2011-12-11 00:28:51 +01:00
committed by Ingo Molnar
parent d9e24427f3
commit cd09c0c40a
3 changed files with 20 additions and 18 deletions
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8
arch/x86/kernel/cpu/perf_event.c
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@@ -1304,9 +1304,15 @@ static int __init init_hw_perf_events(void)
0, x86_pmu.num_counters, 0);
if (x86_pmu.event_constraints) {
/*
* event on fixed counter2 (REF_CYCLES) only works on this
* counter, so do not extend mask to generic counters
*/
for_each_event_constraint(c, x86_pmu.event_constraints) {
if (c->cmask != X86_RAW_EVENT_MASK)
if (c->cmask != X86_RAW_EVENT_MASK
|| c->idxmsk64 == X86_PMC_MSK_FIXED_REF_CYCLES) {
continue;
}
c->idxmsk64 |= (1ULL << x86_pmu.num_counters) - 1;
c->weight += x86_pmu.num_counters;