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perf arm_spe: Decode SME data processing packet

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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>
This commit is contained in:
Leo Yan
2025-11-18 20:31:29 -08:00
committed by Namhyung Kim
parent 876294a645
commit c4cfe1bceb
2 changed files with 20 additions and 0 deletions
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tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
+9
View File
@@ -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)
tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
+11
View File
@@ -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)