diff options
author | Robert Richter <robert.richter@amd.com> | 2012-07-25 13:12:45 -0400 |
---|---|---|
committer | Ingo Molnar <mingo@kernel.org> | 2012-09-13 10:59:48 -0400 |
commit | bad9ac2d7f878a31cf1ae8c1ee3768077d222bcb (patch) | |
tree | 26f49a2e0824a6e6a7830e12faaeaf201b16d99b /include/linux/perf_event.h | |
parent | 35534b201c9f115c68962c095b5a9aad204d025f (diff) |
perf/x86/ibs: Check syscall attribute flags
Current implementation simply ignores attribute flags. Thus, there is
no notification to userland of unsupported features. Check syscall's
attribute flags to let userland know if a feature is supported by the
kernel. This is also needed to distinguish between future kernels what
might support a feature.
Cc: <stable@vger.kernel.org> v3.5..
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20120910093018.GO8285@erda.amd.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/perf_event.h')
-rw-r--r-- | include/linux/perf_event.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index 33ed9d605f91..bdb41612bfec 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h | |||
@@ -274,6 +274,8 @@ struct perf_event_attr { | |||
274 | __u64 branch_sample_type; /* enum branch_sample_type */ | 274 | __u64 branch_sample_type; /* enum branch_sample_type */ |
275 | }; | 275 | }; |
276 | 276 | ||
277 | #define perf_flags(attr) (*(&(attr)->read_format + 1)) | ||
278 | |||
277 | /* | 279 | /* |
278 | * Ioctls that can be done on a perf event fd: | 280 | * Ioctls that can be done on a perf event fd: |
279 | */ | 281 | */ |