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Subject[V3 01/10] perf: New conditional branch filter criteria in branch stack sampling
Date
POWER8 PMU based BHRB supports filtering for conditional branches.
This patch introduces new branch filter PERF_SAMPLE_BRANCH_COND which
will extend the existing perf ABI. Other architectures can provide
this functionality with either HW filtering support (if present) or
with SW filtering of instructions.

Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Reviewed-by: Stephane Eranian <eranian@google.com>
---
include/uapi/linux/perf_event.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h
index 0b1df41..5da52b6 100644
--- a/include/uapi/linux/perf_event.h
+++ b/include/uapi/linux/perf_event.h
@@ -160,8 +160,9 @@ enum perf_branch_sample_type {
PERF_SAMPLE_BRANCH_ABORT_TX = 1U << 7, /* transaction aborts */
PERF_SAMPLE_BRANCH_IN_TX = 1U << 8, /* in transaction */
PERF_SAMPLE_BRANCH_NO_TX = 1U << 9, /* not in transaction */
+ PERF_SAMPLE_BRANCH_COND = 1U << 10, /* conditional branches */

- PERF_SAMPLE_BRANCH_MAX = 1U << 10, /* non-ABI */
+ PERF_SAMPLE_BRANCH_MAX = 1U << 11, /* non-ABI */
};

#define PERF_SAMPLE_BRANCH_PLM_ALL \
--
1.7.11.7


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