linux-kernel - [PATCH v3 03/25] perf arm

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20251112-perf_support_arm_spev1-3-v3-3-e63c9829f9d9@arm.com>
Date: Wed, 12 Nov 2025 18:24:29 +0000
From: Leo Yan <leo.yan@....com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
 Arnaldo Carvalho de Melo <acme@...nel.org>, 
 Namhyung Kim <namhyung@...nel.org>, Jiri Olsa <jolsa@...nel.org>, 
 Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, 
 James Clark <james.clark@...aro.org>, Mark Rutland <mark.rutland@....com>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>, 
 linux-perf-users@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-kernel@...r.kernel.org, Leo Yan <leo.yan@....com>
Subject: [PATCH v3 03/25] perf arm_spe: Decode GCS operation

Decode a load or store from a GCS operation and the associated "common"
field.

After:

  .  00000000:  49 44                                           LD GCS COMM
  .  00000002:  b2 18 3c d7 83 00 80 ff ff                      VA 0xffff800083d73c18
  .  0000000b:  9a 00 00                                        LAT 0 XLAT
  .  0000000e:  43 00                                           DATA-SOURCE 0

Signed-off-by: Leo Yan <leo.yan@....com>
---
 tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c | 4 ++++
 tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
index f6e9c58ce62f3ae227a79d91caefaef4bd87d98a..0046079edaccdd4d0c093f73395d1ecdc0007621 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
@@ -394,6 +394,10 @@ static int arm_spe_pkt_desc_op_type(const struct arm_spe_pkt *packet,
 				arm_spe_pkt_out_string(&err, &buf, &buf_len, " PRED");
 			if (payload & SPE_OP_PKT_SVE_SG)
 				arm_spe_pkt_out_string(&err, &buf, &buf_len, " SG");
+		} else if (SPE_OP_PKT_LDST_SUBCLASS_GCS(payload)) {
+			arm_spe_pkt_out_string(&err, &buf, &buf_len, " GCS");
+			if (payload & SPE_OP_PKT_GCS_COMM)
+				arm_spe_pkt_out_string(&err, &buf, &buf_len, " COMM");
 		}
 		break;
 	case SPE_OP_PKT_HDR_CLASS_BR_ERET:
diff --git a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
index cb947e625918922dc1fa25cf8843b09661197782..94333e7bc382deef119414e4f1de7c2878620035 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
@@ -154,6 +154,10 @@ enum arm_spe_events {
 #define SPE_OP_PKT_SVE_PRED			BIT(2)
 #define SPE_OP_PKT_SVE_FP			BIT(1)
 
+#define SPE_OP_PKT_LDST_SUBCLASS_GCS(v)		(((v) & (GENMASK_ULL(7, 3) | BIT(1))) == 0x40)
+
+#define SPE_OP_PKT_GCS_COMM			BIT(2)
+
 #define SPE_OP_PKT_CR_MASK			GENMASK_ULL(4, 3)
 #define SPE_OP_PKT_CR_BL(v)			(FIELD_GET(SPE_OP_PKT_CR_MASK, (v)) == 1)
 #define SPE_OP_PKT_CR_RET(v)			(FIELD_GET(SPE_OP_PKT_CR_MASK, (v)) == 2)

-- 
2.34.1