[PATCH 2/3] perf: arm-spe: Fix SPE events with phys addresses

From: Timothy Hayes <timothy.hayes@arm.com>
To: linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
	acme@kernel.org
Cc: Timothy Hayes <timothy.hayes@arm.com>,
	John Garry <john.garry@huawei.com>, Will Deacon <will@kernel.org>,
	Mathieu Poirier <mathieu.poirier@linaro.org>,
	Leo Yan <leo.yan@linaro.org>, Mark Rutland <mark.rutland@arm.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Jiri Olsa <jolsa@kernel.org>, Namhyung Kim <namhyung@kernel.org>,
	Martin KaFai Lau <kafai@fb.com>, Song Liu <songliubraving@fb.com>,
	Yonghong Song <yhs@fb.com>,
	John Fastabend <john.fastabend@gmail.com>,
	KP Singh <kpsingh@kernel.org>,
	linux-arm-kernel@lists.infradead.org, netdev@vger.kernel.org,
	bpf@vger.kernel.org
Subject: [PATCH 2/3] perf: arm-spe: Fix SPE events with phys addresses
Date: Thu, 21 Apr 2022 17:52:04 +0100	[thread overview]
Message-ID: <20220421165205.117662-3-timothy.hayes@arm.com> (raw)
In-Reply-To: <20220421165205.117662-1-timothy.hayes@arm.com>

This patch corrects a bug whereby SPE collection is invoked with
pa_enable=1 but synthesized events fail to show physical addresses.

Signed-off-by: Timothy Hayes <timothy.hayes@arm.com>
---
 tools/perf/arch/arm64/util/arm-spe.c | 10 ++++++++++
 tools/perf/util/arm-spe.c            |  3 ++-
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/tools/perf/arch/arm64/util/arm-spe.c b/tools/perf/arch/arm64/util/arm-spe.c
index af4d63af8072..e8b577d33e53 100644
--- a/tools/perf/arch/arm64/util/arm-spe.c
+++ b/tools/perf/arch/arm64/util/arm-spe.c
@@ -148,6 +148,7 @@ static int arm_spe_recording_options(struct auxtrace_record *itr,
 	bool privileged = perf_event_paranoid_check(-1);
 	struct evsel *tracking_evsel;
 	int err;
+	u64 bit;
 
 	sper->evlist = evlist;
 
@@ -245,6 +246,15 @@ static int arm_spe_recording_options(struct auxtrace_record *itr,
 	 */
 	evsel__set_sample_bit(arm_spe_evsel, DATA_SRC);
 
+	/*
+	 * The PHYS_ADDR flag does not affect the driver behaviour, it is used to
+	 * inform that the resulting output's SPE samples contain physical addresses
+	 * where applicable.
+	 */
+	bit = perf_pmu__format_bits(&arm_spe_pmu->format, "pa_enable");
+	if (arm_spe_evsel->core.attr.config & bit)
+		evsel__set_sample_bit(arm_spe_evsel, PHYS_ADDR);
+
 	/* Add dummy event to keep tracking */
 	err = parse_events(evlist, "dummy:u", NULL);
 	if (err)
diff --git a/tools/perf/util/arm-spe.c b/tools/perf/util/arm-spe.c
index 151cc38a171c..1a80151baed9 100644
--- a/tools/perf/util/arm-spe.c
+++ b/tools/perf/util/arm-spe.c
@@ -1033,7 +1033,8 @@ arm_spe_synth_events(struct arm_spe *spe, struct perf_session *session)
 	memset(&attr, 0, sizeof(struct perf_event_attr));
 	attr.size = sizeof(struct perf_event_attr);
 	attr.type = PERF_TYPE_HARDWARE;
-	attr.sample_type = evsel->core.attr.sample_type & PERF_SAMPLE_MASK;
+	attr.sample_type = evsel->core.attr.sample_type &
+				(PERF_SAMPLE_MASK | PERF_SAMPLE_PHYS_ADDR);
 	attr.sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID |
 			    PERF_SAMPLE_PERIOD | PERF_SAMPLE_DATA_SRC |
 			    PERF_SAMPLE_WEIGHT | PERF_SAMPLE_ADDR;
-- 
2.25.1

