linux-kernel - [PATCH v4 2/2] perf arm-spe: Add support for SPE Data Source packet on AmpereOne

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Message-ID: <20241108010911.58412-3-ilkka@os.amperecomputing.com>
Date: Fri,  8 Nov 2024 01:09:11 +0000
From: Ilkka Koskinen <ilkka@...amperecomputing.com>
To: John Garry <john.g.garry@...cle.com>,
	Will Deacon <will@...nel.org>,
	James Clark <james.clark@...aro.org>,
	Mike Leach <mike.leach@...aro.org>,
	Leo Yan <leo.yan@...ux.dev>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Jiri Olsa <jolsa@...nel.org>,
	Ian Rogers <irogers@...gle.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	"Liang, Kan" <kan.liang@...ux.intel.com>,
	Graham Woodward <graham.woodward@....com>
Cc: Ilkka Koskinen <ilkka@...amperecomputing.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-perf-users@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v4 2/2] perf arm-spe: Add support for SPE Data Source packet on AmpereOne

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

Signed-off-by: Ilkka Koskinen <ilkka@...amperecomputing.com>
---
 .../util/arm-spe-decoder/arm-spe-decoder.h    |  9 ++++
 tools/perf/util/arm-spe.c                     | 44 +++++++++++++++++++
 2 files changed, 53 insertions(+)

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 358c611eeddb..4bcd627e859f 100644
--- 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 dfb0c07cb7fe..df84933b673d 100644
--- a/tools/perf/util/arm-spe.c
+++ b/tools/perf/util/arm-spe.c
@@ -455,8 +455,14 @@ static const struct midr_range common_ds_encoding_cpus[] = {
 	{},
 };
 
+static const struct midr_range ampereone_ds_encoding_cpus[] = {
+	MIDR_ALL_VERSIONS(MIDR_AMPERE1A),
+	{},
+};
+
 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__sample_flags(struct arm_spe_queue *speq)
@@ -548,6 +554,44 @@ 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 void arm_spe__synth_memory_level(const struct arm_spe_record *record,
 					union perf_mem_data_src *data_src)
 {
-- 
2.47.0