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| author | Stephane Eranian <eranian@google.com> | 2012-02-10 02:20:59 +0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2012-03-05 17:55:42 +0400 |
| commit | 2481c5fa6db0237e4f0168f88913178b2b495b7c (patch) | |
| tree | 4d0e8e9616c8e83ca2a72abbc3ac94621adc49be /arch/arm | |
| parent | 3e702ff6d1ea12dcf1c798ecb61e7f3a1579df42 (diff) | |
| download | linux-2481c5fa6db0237e4f0168f88913178b2b495b7c.tar.xz | |
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/arm')
| -rw-r--r-- | arch/arm/kernel/perf_event.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c index 5bb91bf3d47f..a23c42abc694 100644 --- a/arch/arm/kernel/perf_event.c +++ b/arch/arm/kernel/perf_event.c @@ -539,6 +539,10 @@ static int armpmu_event_init(struct perf_event *event) int err = 0; atomic_t *active_events = &armpmu->active_events; + /* does not support taken branch sampling */ + if (has_branch_stack(event)) + return -EOPNOTSUPP; + if (armpmu->map_event(event) == -ENOENT) return -ENOENT; |