diff options
| author | Leo Yan <leo.yan@arm.com> | 2024-10-03 19:53:18 +0100 |
|---|---|---|
| committer | Namhyung Kim <namhyung@kernel.org> | 2024-10-14 12:04:31 -0700 |
| commit | 56ae663e7636f2ce180201f0f18d7736c319a43f (patch) | |
| tree | 91b77748de8d87d8597c1b4d986bdbca7d3f6f5b /tools/perf | |
| parent | 50b8f1d5bf4ad7f09ef8012ccf5f94f741df827b (diff) | |
perf arm-spe: Introduce arm_spe__is_homogeneous()
Introduce the arm_spe__is_homogeneous() function, it uses to check if
Arm SPE is homogeneous cross all CPUs.
Signed-off-by: Leo Yan <leo.yan@arm.com>
Reviewed-by: James Clark <james.clark@linaro.org>
Link: https://lore.kernel.org/r/20241003185322.192357-4-leo.yan@arm.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/util/arm-spe.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/tools/perf/util/arm-spe.c b/tools/perf/util/arm-spe.c index b0e9eb6057c3b..587943b6bdb80 100644 --- a/tools/perf/util/arm-spe.c +++ b/tools/perf/util/arm-spe.c @@ -82,6 +82,7 @@ struct arm_spe { u64 **metadata; u64 metadata_ver; u64 metadata_nr_cpu; + bool is_homogeneous; }; struct arm_spe_queue { @@ -1374,6 +1375,30 @@ synth_instructions_out: return 0; } +static bool arm_spe__is_homogeneous(u64 **metadata, int nr_cpu) +{ + u64 midr; + int i; + + if (!nr_cpu) + return false; + + for (i = 0; i < nr_cpu; i++) { + if (!metadata[i]) + return false; + + if (i == 0) { + midr = metadata[i][ARM_SPE_CPU_MIDR]; + continue; + } + + if (midr != metadata[i][ARM_SPE_CPU_MIDR]) + return false; + } + + return true; +} + int arm_spe_process_auxtrace_info(union perf_event *event, struct perf_session *session) { @@ -1419,6 +1444,7 @@ int arm_spe_process_auxtrace_info(union perf_event *event, spe->metadata = metadata; spe->metadata_ver = metadata_ver; spe->metadata_nr_cpu = nr_cpu; + spe->is_homogeneous = arm_spe__is_homogeneous(metadata, nr_cpu); spe->timeless_decoding = arm_spe__is_timeless_decoding(spe); |