linux-kernel - [PATCH v2 10/14] perf arm-spe: Store operation types in packet

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Date:   Tue,  1 Sep 2020 09:38:11 +0100
From:   Leo Yan <leo.yan@...aro.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Ian Rogers <irogers@...gle.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        "Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>,
        Kemeng Shi <shikemeng@...wei.com>,
        James Clark <james.clark@....com>,
        Wei Li <liwei391@...wei.com>, Al Grant <Al.Grant@....com>,
        Will Deacon <will@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Mike Leach <mike.leach@...aro.org>,
        linux-kernel@...r.kernel.org
Cc:     Leo Yan <leo.yan@...aro.org>
Subject: [PATCH v2 10/14] perf arm-spe: Store operation types in packet

This patch is to store operation types into packet structure, this can
be used by frontend to generate memory accessing info for samples.

Signed-off-by: Leo Yan <leo.yan@...aro.org>
---
 tools/perf/util/arm-spe-decoder/arm-spe-decoder.c | 11 +++++++++++
 tools/perf/util/arm-spe-decoder/arm-spe-decoder.h |  6 ++++++
 2 files changed, 17 insertions(+)

diff --git a/tools/perf/util/arm-spe-decoder/arm-spe-decoder.c b/tools/perf/util/arm-spe-decoder/arm-spe-decoder.c
index 1c430657939f..7bf787c47f5b 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-decoder.c
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-decoder.c
@@ -170,6 +170,17 @@ static int arm_spe_read_record(struct arm_spe_decoder *decoder)
 		case ARM_SPE_CONTEXT:
 			break;
 		case ARM_SPE_OP_TYPE:
+			/*
+			 * When operation type packet header's class equals 1,
+			 * the payload's least significant bit (LSB) indicates
+			 * the operation type: load/swap or store.
+			 */
+			if (idx == 1) {
+				if (payload & 0x1)
+					decoder->record.op = ARM_SPE_ST;
+				else
+					decoder->record.op = ARM_SPE_LD;
+			}
 			break;
 		case ARM_SPE_EVENTS:
 			if (payload & SPE_EVT_PKT_L1D_REFILL)
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 31d1776785de..3273cee95ea1 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-decoder.h
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-decoder.h
@@ -24,9 +24,15 @@ enum arm_spe_sample_type {
 	ARM_SPE_REMOTE_ACCESS	= 1 << 7,
 };
 
+enum arm_spe_op_type {
+	ARM_SPE_LD		= 1 << 0,
+	ARM_SPE_ST		= 1 << 1,
+};
+
 struct arm_spe_record {
 	enum arm_spe_sample_type type;
 	int err;
+	u32 op;
 	u64 from_ip;
 	u64 to_ip;
 	u64 timestamp;
-- 
2.20.1