diff options
| author | Vince Weaver <vincent.weaver@maine.edu> | 2013-08-23 23:51:03 +0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-09-02 10:42:48 +0400 |
| commit | 274481de6cb69abdb49403ff32abb63c23743413 (patch) | |
| tree | fe974241d382214e3d19a5a35ed97adb16158ba1 /include/uapi | |
| parent | 13d7a2410fa637f450a29ecb515ac318ee40c741 (diff) | |
| download | linux-274481de6cb69abdb49403ff32abb63c23743413.tar.xz | |
perf: Export struct perf_branch_entry to userspace
If PERF_SAMPLE_BRANCH_STACK is enabled then samples are returned
with the format { u64 from, to, flags } but the flags layout
is not specified.
This field has the type struct perf_branch_entry; move this
definition into include/uapi/linux/perf_event.h so users can
access these fields.
This is similar to the existing inclusion of perf_mem_data_src in
the include/uapi/linux/perf_event.h file.
Signed-off-by: Vince Weaver <vincent.weaver@maine.edu>
Acked-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1308231544420.1889@vincent-weaver-1.um.maine.edu
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/perf_event.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h index a77f43af72b8..408b8c730731 100644 --- a/include/uapi/linux/perf_event.h +++ b/include/uapi/linux/perf_event.h @@ -757,4 +757,28 @@ union perf_mem_data_src { #define PERF_MEM_S(a, s) \ (((u64)PERF_MEM_##a##_##s) << PERF_MEM_##a##_SHIFT) +/* + * single taken branch record layout: + * + * from: source instruction (may not always be a branch insn) + * to: branch target + * mispred: branch target was mispredicted + * predicted: branch target was predicted + * + * support for mispred, predicted is optional. In case it + * is not supported mispred = predicted = 0. + * + * in_tx: running in a hardware transaction + * abort: aborting a hardware transaction + */ +struct perf_branch_entry { + __u64 from; + __u64 to; + __u64 mispred:1, /* target mispredicted */ + predicted:1,/* target predicted */ + in_tx:1, /* in transaction */ + abort:1, /* transaction abort */ + reserved:60; +}; + #endif /* _UAPI_LINUX_PERF_EVENT_H */ |