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perf, x86: Implement arch event mask as quirk

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Implement the disabling of arch events as a quirk so that we can print
a message along with it. This creates some visibility into the problem
space and could allow us to work on adding more work-around like the
AAJ80 one.

Requested-by: Ingo Molnar <mingo@elte.hu>
Cc: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/n/tip-wcja2z48wklzu1b0nkz0a5y7@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra
2011-12-06 14:07:15 +01:00
committed by Ingo Molnar
parent ffb871bc91
commit c1d6f42f1a
3 changed files with 68 additions and 33 deletions
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5
arch/x86/kernel/cpu/perf_event.c
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@@ -1248,6 +1248,7 @@ static void __init pmu_check_apic(void)
static int __init init_hw_perf_events(void)
{
struct x86_pmu_quirk *quirk;
struct event_constraint *c;
int err;
@@ -1276,8 +1277,8 @@ static int __init init_hw_perf_events(void)
pr_cont("%s PMU driver.\n", x86_pmu.name);
if (x86_pmu.quirks)
x86_pmu.quirks();
for (quirk = x86_pmu.quirks; quirk; quirk = quirk->next)
quirk->func();
if (x86_pmu.num_counters > X86_PMC_MAX_GENERIC) {
WARN(1, KERN_ERR "hw perf events %d > max(%d), clipping!",