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| author | Leo Yan <leo.yan@arm.com> | 2025-11-12 21:24:32 +0300 |
|---|---|---|
| committer | Namhyung Kim <namhyung@kernel.org> | 2025-11-19 07:31:29 +0300 |
| commit | c4cfe1bcebb05c3ab71dcd3f24cc9ed350d860c0 (patch) | |
| tree | 93b1cb7464c38720bde0e631e04f678676d0c5ff | |
| parent | 876294a6455e9bba81391c76f78c4563c3b8bc1d (diff) | |
| download | linux-c4cfe1bcebb05c3ab71dcd3f24cc9ed350d860c0.tar.xz | |
perf arm_spe: Decode SME data processing packet
For SME data processing, decode its Effective vector length or Tile Size
(ETS), and print out if a floating-point operation.
After:
. 00000000: 49 00 SME-OTHER ETS 1024 FP
. 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@arm.com>
Reviewed-by: Ian Rogers <irogers@google.com>
Reviewed-by: James Clark <james.clark@linaro.org>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
| -rw-r--r-- | tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c | 9 | ||||
| -rw-r--r-- | tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h | 11 |
2 files changed, 20 insertions, 0 deletions
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 21b65a9b40f4..5769ba2f4140 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 @@ -351,6 +351,15 @@ static int arm_spe_pkt_desc_op_type(const struct arm_spe_pkt *packet, arm_spe_pkt_out_string(&err, &buf, &buf_len, " FP"); if (payload & SPE_OP_PKT_SVE_PRED) arm_spe_pkt_out_string(&err, &buf, &buf_len, " PRED"); + } else if (SPE_OP_PKT_OTHER_SUBCLASS_SME(payload)) { + arm_spe_pkt_out_string(&err, &buf, &buf_len, "SME-OTHER"); + + /* SME effective vector length or tile size */ + arm_spe_pkt_out_string(&err, &buf, &buf_len, " ETS %d", + SPE_OP_PKG_SME_ETS(payload)); + + if (payload & SPE_OP_PKT_OTHER_FP) + arm_spe_pkt_out_string(&err, &buf, &buf_len, " FP"); } else if (SPE_OP_PKT_OTHER_SUBCLASS_OTHER(payload)) { arm_spe_pkt_out_string(&err, &buf, &buf_len, "OTHER"); if (payload & SPE_OP_PKT_OTHER_ASE) 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 704601c6dbe3..adf4cde320aa 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 @@ -125,10 +125,21 @@ enum arm_spe_events { #define SPE_OP_PKT_OTHER_SUBCLASS_OTHER(v) (((v) & GENMASK_ULL(7, 3)) == 0x0) #define SPE_OP_PKT_OTHER_SUBCLASS_SVE(v) (((v) & (BIT(7) | BIT(3) | BIT(0))) == 0x8) +#define SPE_OP_PKT_OTHER_SUBCLASS_SME(v) (((v) & (BIT(7) | BIT(3) | BIT(0))) == 0x88) #define SPE_OP_PKT_OTHER_ASE BIT(2) #define SPE_OP_PKT_OTHER_FP BIT(1) +/* + * SME effective vector length or tile size (ETS) is stored in byte 0 + * bits [6:4,2]; the length is rounded up to a power of two and use 128 + * as one step, so ETS calculation is: + * + * 128 * (2 ^ bits [6:4,2]) = 32 << (bits [6:4,2]) + */ +#define SPE_OP_PKG_SME_ETS(v) (128 << (FIELD_GET(GENMASK_ULL(6, 4), (v)) << 1 | \ + (FIELD_GET(BIT(2), (v))))) + #define SPE_OP_PKT_LDST_SUBCLASS_GP_REG(v) (((v) & GENMASK_ULL(7, 1)) == 0x0) #define SPE_OP_PKT_LDST_SUBCLASS_SIMD_FP(v) (((v) & GENMASK_ULL(7, 1)) == 0x4) #define SPE_OP_PKT_LDST_SUBCLASS_UNSPEC_REG(v) (((v) & GENMASK_ULL(7, 1)) == 0x10) |