linux-kernel - [PATCH 1/4] perf event: Add simd_flags field to perf

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Date:   Mon, 19 Dec 2022 16:12:55 +0000
From:   James Clark <james.clark@....com>
To:     linux-perf-users@...r.kernel.org
Cc:     robh@...nel.org, German Gomez <german.gomez@....com>,
        James Clark <james.clark@....com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        John Garry <john.g.garry@...cle.com>,
        Will Deacon <will@...nel.org>,
        Mike Leach <mike.leach@...aro.org>,
        Leo Yan <leo.yan@...aro.org>, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 1/4] perf event: Add simd_flags field to perf_sample

From: German Gomez <german.gomez@....com>

Add new field to the struct perf_sample to store flags related to SIMD
ops.

It will be used to store SIMD information from SVE and NEON when
profiling using ARM SPE.

Signed-off-by: German Gomez <german.gomez@....com>
Signed-off-by: James Clark <james.clark@....com>
---
 tools/perf/util/sample.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/tools/perf/util/sample.h b/tools/perf/util/sample.h
index 60ec79d4eea4..bdf52faf165f 100644
--- a/tools/perf/util/sample.h
+++ b/tools/perf/util/sample.h
@@ -66,6 +66,18 @@ struct aux_sample {
 	void *data;
 };
 
+struct simd_flags {
+	u64	arch:1,	/* architecture (isa) */
+		pred:2;	/* predication */
+};
+
+/* simd architecture flags */
+#define SIMD_OP_FLAGS_ARCH_SVE		0x01	/* ARM SVE */
+
+/* simd predicate flags */
+#define SIMD_OP_FLAGS_PRED_PARTIAL	0x01	/* partial predicate */
+#define SIMD_OP_FLAGS_PRED_EMPTY	0x02	/* empty predicate */
+
 struct perf_sample {
 	u64 ip;
 	u32 pid, tid;
@@ -103,6 +115,7 @@ struct perf_sample {
 	struct stack_dump user_stack;
 	struct sample_read read;
 	struct aux_sample aux_sample;
+	struct simd_flags simd_flags;
 };
 
 /*
-- 
2.25.1