commit 2c44b1936bb3b135a3fac8b3493394d42e51cf70
author Peter Zijlstra <peterz@infradead.org> Wed Nov 05 10:36:45 2014 +0100
committer Ingo Molnar <mingo@kernel.org> Wed Feb 18 17:16:15 2015 +0100
tree b9b212a14c2ce1043ac7537678c5415a03ceb2ed
parent aa54ae9b87b83af7edabcc34a299e7e014609af4

perf/x86/intel: Expose LBR callstack to user space tooling

With LBR call stack feature enable, there are three callchain options.
Enable the 3rd callchain option (LBR callstack) to user space tooling.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-api@vger.kernel.org
Link: http://lkml.kernel.org/r/20141105093759.GQ10501@worktop.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>

include/uapi/linux/perf_event.h

diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h
index e46b932..1e3cd07 100644
--- a/include/uapi/linux/perf_event.h
+++ b/include/uapi/linux/perf_event.h
@@ -166,6 +166,8 @@
 	PERF_SAMPLE_BRANCH_NO_TX_SHIFT		= 9, /* not in transaction */
 	PERF_SAMPLE_BRANCH_COND_SHIFT		= 10, /* conditional branches */
 
+	PERF_SAMPLE_BRANCH_CALL_STACK_SHIFT	= 11, /* call/ret stack */
+
 	PERF_SAMPLE_BRANCH_MAX_SHIFT		/* non-ABI */
 };
 
@@ -175,18 +177,16 @@
 	PERF_SAMPLE_BRANCH_HV		= 1U << PERF_SAMPLE_BRANCH_HV_SHIFT,
 
 	PERF_SAMPLE_BRANCH_ANY		= 1U << PERF_SAMPLE_BRANCH_ANY_SHIFT,
-	PERF_SAMPLE_BRANCH_ANY_CALL	=
-				1U << PERF_SAMPLE_BRANCH_ANY_CALL_SHIFT,
-	PERF_SAMPLE_BRANCH_ANY_RETURN	=
-				1U << PERF_SAMPLE_BRANCH_ANY_RETURN_SHIFT,
-	PERF_SAMPLE_BRANCH_IND_CALL	=
-				1U << PERF_SAMPLE_BRANCH_IND_CALL_SHIFT,
-	PERF_SAMPLE_BRANCH_ABORT_TX	=
-				1U << PERF_SAMPLE_BRANCH_ABORT_TX_SHIFT,
+	PERF_SAMPLE_BRANCH_ANY_CALL	= 1U << PERF_SAMPLE_BRANCH_ANY_CALL_SHIFT,
+	PERF_SAMPLE_BRANCH_ANY_RETURN	= 1U << PERF_SAMPLE_BRANCH_ANY_RETURN_SHIFT,
+	PERF_SAMPLE_BRANCH_IND_CALL	= 1U << PERF_SAMPLE_BRANCH_IND_CALL_SHIFT,
+	PERF_SAMPLE_BRANCH_ABORT_TX	= 1U << PERF_SAMPLE_BRANCH_ABORT_TX_SHIFT,
 	PERF_SAMPLE_BRANCH_IN_TX	= 1U << PERF_SAMPLE_BRANCH_IN_TX_SHIFT,
 	PERF_SAMPLE_BRANCH_NO_TX	= 1U << PERF_SAMPLE_BRANCH_NO_TX_SHIFT,
 	PERF_SAMPLE_BRANCH_COND		= 1U << PERF_SAMPLE_BRANCH_COND_SHIFT,
 
+	PERF_SAMPLE_BRANCH_CALL_STACK	= 1U << PERF_SAMPLE_BRANCH_CALL_STACK_SHIFT,
+
 	PERF_SAMPLE_BRANCH_MAX		= 1U << PERF_SAMPLE_BRANCH_MAX_SHIFT,
 };