perf arm-spe: Add support for SPE Data Source packet on AmpereOne

Decode SPE Data Source packets on AmpereOne. The field is IMPDEF.

Reviewed-by: Leo Yan <leo.yan@arm.com>
Signed-off-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Graham Woodward <graham.woodward@arm.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linux.dev>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20241108202946.16835-3-ilkka@os.amperecomputing.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/arm-spe-decoder/arm-spe-decoder.h b/tools/perf/util/arm-spe-decoder/arm-spe-decoder.h
index 358c611eeddbb3f908b673c9adb8b01a69e5b87f..4bcd627e859f69ea83ca633ab1ce87c3ce63e967 100644 (file)
--- a/tools/perf/util/arm-spe-decoder/arm-spe-decoder.h
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-decoder.h
@@ -67,6 +67,15 @@ enum arm_spe_common_data_source {
        ARM_SPE_COMMON_DS_DRAM          = 0xe,
 };
 
+enum arm_spe_ampereone_data_source {
+       ARM_SPE_AMPEREONE_LOCAL_CHIP_CACHE_OR_DEVICE    = 0x0,
+       ARM_SPE_AMPEREONE_SLC                           = 0x3,
+       ARM_SPE_AMPEREONE_REMOTE_CHIP_CACHE             = 0x5,
+       ARM_SPE_AMPEREONE_DDR                           = 0x7,
+       ARM_SPE_AMPEREONE_L1D                           = 0x8,
+       ARM_SPE_AMPEREONE_L2D                           = 0x9,
+};
+
 struct arm_spe_record {
        enum arm_spe_sample_type type;
        int err;

diff --git a/tools/perf/util/arm-spe.c b/tools/perf/util/arm-spe.c
index 3064c3f22806917f0e613cded802d2f9880cf745..12761c39788f806c228495afe257e138cabe91d1 100644 (file)
--- a/tools/perf/util/arm-spe.c
+++ b/tools/perf/util/arm-spe.c
@@ -455,6 +455,11 @@ static const struct midr_range common_ds_encoding_cpus[] = {
        {},
 };
 
+static const struct midr_range ampereone_ds_encoding_cpus[] = {
+       MIDR_ALL_VERSIONS(MIDR_AMPERE1A),
+       {},
+};
+
 static void arm_spe__sample_flags(struct arm_spe_queue *speq)
 {
        const struct arm_spe_record *record = &speq->decoder->record;
@@ -544,8 +549,47 @@ static void arm_spe__synth_data_source_common(const struct arm_spe_record *recor
        }
 }
 
+/*
+ * Source is IMPDEF. Here we convert the source code used on AmpereOne cores
+ * to the common (Neoverse, Cortex) to avoid duplicating the decoding code.
+ */
+static void arm_spe__synth_data_source_ampereone(const struct arm_spe_record *record,
+                                                union perf_mem_data_src *data_src)
+{
+       struct arm_spe_record common_record;
+
+       switch (record->source) {
+       case ARM_SPE_AMPEREONE_LOCAL_CHIP_CACHE_OR_DEVICE:
+               common_record.source = ARM_SPE_COMMON_DS_PEER_CORE;
+               break;
+       case ARM_SPE_AMPEREONE_SLC:
+               common_record.source = ARM_SPE_COMMON_DS_SYS_CACHE;
+               break;
+       case ARM_SPE_AMPEREONE_REMOTE_CHIP_CACHE:
+               common_record.source = ARM_SPE_COMMON_DS_REMOTE;
+               break;
+       case ARM_SPE_AMPEREONE_DDR:
+               common_record.source = ARM_SPE_COMMON_DS_DRAM;
+               break;
+       case ARM_SPE_AMPEREONE_L1D:
+               common_record.source = ARM_SPE_COMMON_DS_L1D;
+               break;
+       case ARM_SPE_AMPEREONE_L2D:
+               common_record.source = ARM_SPE_COMMON_DS_L2;
+               break;
+       default:
+               pr_warning_once("AmpereOne: Unknown data source (0x%x)\n",
+                               record->source);
+               return;
+       }
+
+       common_record.op = record->op;
+       arm_spe__synth_data_source_common(&common_record, data_src);
+}
+
 static const struct data_source_handle data_source_handles[] = {
        DS(common_ds_encoding_cpus, data_source_common),
+       DS(ampereone_ds_encoding_cpus, data_source_ampereone),
 };
 
 static void arm_spe__synth_memory_level(const struct arm_spe_record *record,