linux-kernel - [PATCH V2 5/6] tools headers UAPI: Sync include/uapi/linux/perf

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Message-Id: <20230522113040.2329924-5-kan.liang@linux.intel.com>
Date:   Mon, 22 May 2023 04:30:39 -0700
From:   kan.liang@...ux.intel.com
To:     peterz@...radead.org, mingo@...hat.com, acme@...nel.org,
        linux-kernel@...r.kernel.org
Cc:     mark.rutland@....com, alexander.shishkin@...ux.intel.com,
        jolsa@...nel.org, namhyung@...nel.org, irogers@...gle.com,
        adrian.hunter@...el.com, ak@...ux.intel.com, eranian@...gle.com,
        alexey.v.bayduraev@...ux.intel.com, tinghao.zhang@...el.com,
        Kan Liang <kan.liang@...ux.intel.com>
Subject: [PATCH V2 5/6] tools headers UAPI: Sync include/uapi/linux/perf_event.h header with the kernel

From: Kan Liang <kan.liang@...ux.intel.com>

Sync the new sample type and extension bit for the branch event feature.

Reviewed-by: Andi Kleen <ak@...ux.intel.com>
Signed-off-by: Kan Liang <kan.liang@...ux.intel.com>
---

Changes since V1:
- Rename to PERF_SAMPLE_BRANCH_EVT_CNTRS
- Drop the event ID sample type
- Add extension bit

 tools/include/uapi/linux/perf_event.h | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/tools/include/uapi/linux/perf_event.h b/tools/include/uapi/linux/perf_event.h
index 37675437b768..3911cf000e8a 100644
--- a/tools/include/uapi/linux/perf_event.h
+++ b/tools/include/uapi/linux/perf_event.h
@@ -204,6 +204,8 @@ enum perf_branch_sample_type_shift {
 
 	PERF_SAMPLE_BRANCH_PRIV_SAVE_SHIFT	= 18, /* save privilege mode */
 
+	PERF_SAMPLE_BRANCH_EVT_CNTRS_SHIFT	= 19, /* save occurrences of events on a branch */
+
 	PERF_SAMPLE_BRANCH_MAX_SHIFT		/* non-ABI */
 };
 
@@ -235,6 +237,8 @@ enum perf_branch_sample_type {
 
 	PERF_SAMPLE_BRANCH_PRIV_SAVE	= 1U << PERF_SAMPLE_BRANCH_PRIV_SAVE_SHIFT,
 
+	PERF_SAMPLE_BRANCH_EVT_CNTRS	= 1U << PERF_SAMPLE_BRANCH_EVT_CNTRS_SHIFT,
+
 	PERF_SAMPLE_BRANCH_MAX		= 1U << PERF_SAMPLE_BRANCH_MAX_SHIFT,
 };
 
@@ -1410,6 +1414,7 @@ union perf_mem_data_src {
  *    cycles: cycles from last branch (or 0 if not supported)
  *      type: branch type
  *      spec: branch speculation info (or 0 if not supported)
+ *       ext: has extension space for extra info (or 0 if not supported)
  */
 struct perf_branch_entry {
 	__u64	from;
@@ -1423,7 +1428,8 @@ struct perf_branch_entry {
 		spec:2,     /* branch speculation info */
 		new_type:4, /* additional branch type */
 		priv:3,     /* privilege level */
-		reserved:31;
+		ext:1,      /* has extension */
+		reserved:30;
 };
 
 union perf_sample_weight {
-- 
2.35.1