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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2010-03-03 12:02:30 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-03-10 13:23:32 +0100 |
| commit | caff2befffe899e63df5cc760b7ed01cfd902685 (patch) | |
| tree | fe07f997bd67d1e5ae3122db789d7e7361ddca28 /include/linux/perf_event.h | |
| parent | 69fef0d2e2c2c049ef4207a52e78b50d527bd85a (diff) | |
| download | lwn-caff2befffe899e63df5cc760b7ed01cfd902685.tar.gz lwn-caff2befffe899e63df5cc760b7ed01cfd902685.zip | |
perf, x86: Implement simple LBR support
Implement simple suport Intel Last-Branch-Record, it supports all
hardware that implements FREEZE_LBRS_ON_PMI, but does not (yet) implement
the LBR config register.
The Intel LBR is a FIFO of From,To addresses describing the last few
branches the hardware took.
This patch does not add perf interface to the LBR, but merely provides an
interface for internal use.
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: <20100304140100.544191154@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/perf_event.h')
| -rw-r--r-- | include/linux/perf_event.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index 42307b50c787..ab4fd9ede264 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -467,6 +467,17 @@ struct perf_raw_record { void *data; }; +struct perf_branch_entry { + __u64 from; + __u64 to; + __u64 flags; +}; + +struct perf_branch_stack { + __u64 nr; + struct perf_branch_entry entries[0]; +}; + struct task_struct; /** |