[PATCH 2/2] perf arm-spe: Parse more SPE fields and store source

From: Ali Saidi <alisaidi@amazon.com>
To: <linux-kernel@vger.kernel.org>,
	<linux-perf-users@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>
Cc: <alisaidi@amazon.com>, <benh@kernel.crashing.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@redhat.com>,
	"Arnaldo Carvalho de Melo" <acme@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	"Alexander Shishkin" <alexander.shishkin@linux.intel.com>,
	Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
	John Garry <john.garry@huawei.com>,
	"Will Deacon" <will@kernel.org>,
	Mathieu Poirier <mathieu.poirier@linaro.org>,
	"Leo Yan" <leo.yan@linaro.org>, James Clark <james.clark@arm.com>,
	German Gomez <german.gomez@arm.com>,
	Andrew Kilroy <andrew.kilroy@arm.com>
Subject: [PATCH 2/2] perf arm-spe: Parse more SPE fields and store source
Date: Tue, 25 Jan 2022 19:20:10 +0000	[thread overview]
Message-ID: <20220125192016.20538-3-alisaidi@amazon.com> (raw)
In-Reply-To: <20220125192016.20538-1-alisaidi@amazon.com>

Decode more SPE events and op types to allow for processing by perf
scripts. For example looking for branches which may indicate candidates
for conversion to a CSEL, store exclusives that are candidates for
conversion to LSE atomics and record the source information for memory
ops.

Signed-off-by: Ali Saidi <alisaidi@amazon.com>
---
 .../util/arm-spe-decoder/arm-spe-decoder.c     | 18 ++++++++++++++++++
 .../util/arm-spe-decoder/arm-spe-decoder.h     |  8 ++++++++
 2 files changed, 26 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 5e390a1a79ab..177bac0f7128 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-decoder.c
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-decoder.c
@@ -191,6 +191,20 @@ static int arm_spe_read_record(struct arm_spe_decoder *decoder)
 					decoder->record.op = ARM_SPE_ST;
 				else
 					decoder->record.op = ARM_SPE_LD;
+				if (SPE_OP_PKT_IS_LDST_ATOMIC(payload)) {
+					if (payload & SPE_OP_PKT_AT)
+						decoder->record.op |= ARM_SPE_LDST_ATOMIC;
+					if (payload & SPE_OP_PKT_EXCL)
+						decoder->record.op |= ARM_SPE_LDST_EXCL;
+					if (payload & SPE_OP_PKT_AR)
+						decoder->record.op |= ARM_SPE_LDST_ACQREL;
+				}
+			} else if (idx == SPE_OP_PKT_HDR_CLASS_BR_ERET) {
+				decoder->record.op = ARM_SPE_BR;
+				if (payload & SPE_OP_PKT_COND)
+					decoder->record.op |= ARM_SPE_BR_COND;
+				if (SPE_OP_PKT_IS_INDIRECT_BRANCH(payload))
+					decoder->record.op |= ARM_SPE_BR_IND;
 			}
 			break;
 		case ARM_SPE_EVENTS:
@@ -218,8 +232,12 @@ static int arm_spe_read_record(struct arm_spe_decoder *decoder)
 			if (payload & BIT(EV_MISPRED))
 				decoder->record.type |= ARM_SPE_BRANCH_MISS;
 
+			if (payload & BIT(EV_NOT_TAKEN))
+				decoder->record.type |= ARM_SPE_BR_NOT_TAKEN;
+
 			break;
 		case ARM_SPE_DATA_SOURCE:
+			decoder->record.source = payload;
 			break;
 		case ARM_SPE_BAD:
 			break;
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 69b31084d6be..113e427afe99 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-decoder.h
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-decoder.h
@@ -22,11 +22,18 @@ enum arm_spe_sample_type {
 	ARM_SPE_TLB_MISS	= 1 << 5,
 	ARM_SPE_BRANCH_MISS	= 1 << 6,
 	ARM_SPE_REMOTE_ACCESS	= 1 << 7,
+	ARM_SPE_BR_NOT_TAKEN	= 1 << 8,
 };
 
 enum arm_spe_op_type {
 	ARM_SPE_LD		= 1 << 0,
 	ARM_SPE_ST		= 1 << 1,
+	ARM_SPE_LDST_EXCL	= 1 << 2,
+	ARM_SPE_LDST_ATOMIC	= 1 << 3,
+	ARM_SPE_LDST_ACQREL	= 1 << 4,
+	ARM_SPE_BR		= 1 << 5,
+	ARM_SPE_BR_COND		= 1 << 6,
+	ARM_SPE_BR_IND		= 1 << 7,
 };
 
 struct arm_spe_record {
@@ -40,6 +47,7 @@ struct arm_spe_record {
 	u64 virt_addr;
 	u64 phys_addr;
 	u64 context_id;
+	u16 source;
 };
 
 struct arm_spe_insn;
-- 
2.24.4.AMZN

