perf arm-spe: Fix SPE events with phys addresses

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

Reviewed-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: Timothy Hayes <timothy.hayes@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: John Garry <john.garry@huawei.com>
Cc: KP Singh <kpsingh@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Martin KaFai Lau <kafai@fb.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Song Liu <songliubraving@fb.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yonghong Song <yhs@fb.com>
Cc: bpf@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: netdev@vger.kernel.org
Link: https://lore.kernel.org/r/20220421165205.117662-3-timothy.hayes@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/arch/arm64/util/arm-spe.c b/tools/perf/arch/arm64/util/arm-spe.c
index af4d63a..e8b577d 100644 (file)
--- 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 151cc38..1a80151 100644 (file)
--- 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;