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perf, x86: Disable PEBS on clovertown chips

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This CPU has just too many handycaps to be really useful.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: paulus@samba.org
Cc: eranian@google.com
Cc: robert.richter@amd.com
Cc: fweisbec@gmail.com
LKML-Reference: <20100305154128.890278662@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra
2010-03-04 21:49:01 +01:00
committed by Ingo Molnar
parent 3adaebd695
commit 3c44780b22
2 changed files with 31 additions and 0 deletions
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4
arch/x86/kernel/cpu/perf_event.c
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@@ -197,6 +197,7 @@ struct x86_pmu {
void (*put_event_constraints)(struct cpu_hw_events *cpuc,
struct perf_event *event);
struct event_constraint *event_constraints;
void (*quirks)(void);
void (*cpu_prepare)(int cpu);
void (*cpu_starting)(int cpu);
@@ -1373,6 +1374,9 @@ void __init init_hw_perf_events(void)
pr_cont("%s PMU driver.\n", x86_pmu.name);
if (x86_pmu.quirks)
x86_pmu.quirks();
if (x86_pmu.num_events > X86_PMC_MAX_GENERIC) {
WARN(1, KERN_ERR "hw perf events %d > max(%d), clipping!",
x86_pmu.num_events, X86_PMC_MAX_GENERIC);