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

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Message-ID: <20241024233035.7979-1-ilkka@os.amperecomputing.com>
Date: Thu, 24 Oct 2024 23:30:35 +0000
From: Ilkka Koskinen <ilkka@...amperecomputing.com>
To: 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>,
	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>
Cc: Ilkka Koskinen <ilkka@...amperecomputing.com>,
	linux-perf-users@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: [PATCH] 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                     | 61 +++++++++++++++++++
 2 files changed, 70 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 1443c28545a9..e4115b1e92b2 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_neoverse_data_source {
 	ARM_SPE_NV_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 138ffc71b32d..04bd21ad7ea8 100644
--- a/tools/perf/util/arm-spe.c
+++ b/tools/perf/util/arm-spe.c
@@ -515,10 +515,69 @@ static void arm_spe__synth_data_source_generic(const struct arm_spe_record *reco
 		data_src->mem_lvl |= PERF_MEM_LVL_REM_CCE1;
 }
 
+static const struct midr_range ampereone_source_spe[] = {
+	MIDR_ALL_VERSIONS(MIDR_AMPERE1A),
+	{},
+};
+
+static void arm_spe__synth_data_source_ampereone(const struct arm_spe_record *record,
+						 union perf_mem_data_src *data_src,
+						 u64 midr)
+{
+	if (!is_midr_in_range_list(midr, ampereone_source_spe)) {
+		arm_spe__synth_data_source_generic(record, data_src);
+		return;
+	}
+
+	if (record->op & ARM_SPE_OP_ST) {
+		data_src->mem_lvl = PERF_MEM_LVL_NA;
+		data_src->mem_lvl_num = PERF_MEM_LVLNUM_NA;
+		data_src->mem_snoop = PERF_MEM_SNOOP_NA;
+		return;
+	}
+
+	switch (record->source) {
+	case ARM_SPE_AMPEREONE_LOCAL_CHIP_CACHE_OR_DEVICE:
+		data_src->mem_lvl = PERF_MEM_LVL_L2 | PERF_MEM_LVL_HIT;
+		data_src->mem_lvl_num = PERF_MEM_LVLNUM_L2;
+		data_src->mem_snoopx = PERF_MEM_SNOOPX_PEER;
+		break;
+	case ARM_SPE_AMPEREONE_SLC:
+		data_src->mem_lvl = PERF_MEM_LVL_L3 | PERF_MEM_LVL_HIT;
+		data_src->mem_lvl_num = PERF_MEM_LVLNUM_L3;
+		data_src->mem_snoop = PERF_MEM_SNOOP_HIT;
+		break;
+	case ARM_SPE_AMPEREONE_REMOTE_CHIP_CACHE:
+		data_src->mem_lvl = PERF_MEM_LVL_REM_CCE1;
+		data_src->mem_lvl_num = PERF_MEM_LVLNUM_ANY_CACHE;
+		data_src->mem_remote = PERF_MEM_REMOTE_REMOTE;
+		data_src->mem_snoopx = PERF_MEM_SNOOPX_PEER;
+		break;
+	case ARM_SPE_AMPEREONE_DDR:
+		data_src->mem_lvl = PERF_MEM_LVL_LOC_RAM | PERF_MEM_LVL_HIT;
+		data_src->mem_lvl_num = PERF_MEM_LVLNUM_RAM;
+		data_src->mem_snoop = PERF_MEM_SNOOP_NONE;
+		break;
+	case ARM_SPE_AMPEREONE_L1D:
+		data_src->mem_lvl = PERF_MEM_LVL_L1 | PERF_MEM_LVL_HIT;
+		data_src->mem_lvl_num = PERF_MEM_LVLNUM_L1;
+		data_src->mem_snoop = PERF_MEM_SNOOP_NONE;
+		break;
+	case ARM_SPE_AMPEREONE_L2D:
+		data_src->mem_lvl = PERF_MEM_LVL_L2 | PERF_MEM_LVL_HIT;
+		data_src->mem_lvl_num = PERF_MEM_LVLNUM_L2;
+		data_src->mem_snoop = PERF_MEM_SNOOP_NONE;
+		break;
+	default:
+		break;
+	}
+}
+
 static u64 arm_spe__synth_data_source(const struct arm_spe_record *record, u64 midr)
 {
 	union perf_mem_data_src	data_src = { .mem_op = PERF_MEM_OP_NA };
 	bool is_neoverse = is_midr_in_range_list(midr, neoverse_spe);
+	bool is_ampereone = (read_cpuid_implementor() == ARM_CPU_IMP_AMPERE);
 
 	if (record->op & ARM_SPE_OP_LD)
 		data_src.mem_op = PERF_MEM_OP_LOAD;
@@ -529,6 +588,8 @@ static u64 arm_spe__synth_data_source(const struct arm_spe_record *record, u64 m
 
 	if (is_neoverse)
 		arm_spe__synth_data_source_neoverse(record, &data_src);
+	else if (is_ampereone)
+		arm_spe__synth_data_source_ampereone(record, &data_src, midr);
 	else
 		arm_spe__synth_data_source_generic(record, &data_src);
 
-- 
2.47.0