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authorStephane Eranian <eranian@google.com>2012-02-09 23:20:59 +0100
committerIngo Molnar <mingo@elte.hu>2012-03-05 14:55:42 +0100
commit2481c5fa6db0237e4f0168f88913178b2b495b7c (patch)
tree4d0e8e9616c8e83ca2a72abbc3ac94621adc49be /arch/alpha
parent3e702ff6d1ea12dcf1c798ecb61e7f3a1579df42 (diff)
perf: Disable PERF_SAMPLE_BRANCH_* when not supported
PERF_SAMPLE_BRANCH_* is disabled for: - SW events (sw counters, tracepoints) - HW breakpoints - ALL but Intel x86 architecture - AMD64 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/1328826068-11713-10-git-send-email-eranian@google.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/alpha')
-rw-r--r--arch/alpha/kernel/perf_event.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/alpha/kernel/perf_event.c b/arch/alpha/kernel/perf_event.c
index 8143cd7cdbf..0dae252f7a3 100644
--- a/arch/alpha/kernel/perf_event.c
+++ b/arch/alpha/kernel/perf_event.c
@@ -685,6 +685,10 @@ static int alpha_pmu_event_init(struct perf_event *event)
{
int err;
+ /* does not support taken branch sampling */
+ if (has_branch_stack(event))
+ return -EOPNOTSUPP;
+
switch (event->attr.type) {
case PERF_TYPE_RAW:
case PERF_TYPE_HARDWARE: