Messages in this thread Patch in this message | | | From | Andre Przywara <> | Subject | [PATCH 5/5] perf: arm_spe: Decode SVE events | Date | Tue, 22 Sep 2020 11:12:25 +0100 |
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The Scalable Vector Extension (SVE) is an ARMv8 architecture extension that introduces very long vector operations (up to 2048 bits). The SPE profiling feature can tag SVE instructions with additional properties like predication or the effective vector length.
Decode the new operation type bits in the SPE decoder to allow the perf tool to correctly report about SVE instructions.
Signed-off-by: Andre Przywara <andre.przywara@arm.com> --- .../arm-spe-decoder/arm-spe-pkt-decoder.c | 48 ++++++++++++++++++- 1 file changed, 47 insertions(+), 1 deletion(-)
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 a033f34846a6..f0c369259554 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 @@ -372,8 +372,35 @@ int arm_spe_pkt_desc(const struct arm_spe_pkt *packet, char *buf, } case ARM_SPE_OP_TYPE: switch (idx) { - case 0: return snprintf(buf, buf_len, "%s", payload & 0x1 ? + case 0: { + size_t blen = buf_len; + + if ((payload & 0x89) == 0x08) { + ret = snprintf(buf, buf_len, "SVE"); + buf += ret; + blen -= ret; + if (payload & 0x2) + ret = snprintf(buf, buf_len, " FP"); + else + ret = snprintf(buf, buf_len, " INT"); + buf += ret; + blen -= ret; + if (payload & 0x4) { + ret = snprintf(buf, buf_len, " PRED"); + buf += ret; + blen -= ret; + } + /* Bits [7..4] encode the vector length */ + ret = snprintf(buf, buf_len, " EVLEN%d", + 32 << ((payload >> 4) & 0x7)); + buf += ret; + blen -= ret; + return buf_len - blen; + } + + return snprintf(buf, buf_len, "%s", payload & 0x1 ? "COND-SELECT" : "INSN-OTHER"); + } case 1: { size_t blen = buf_len; @@ -403,6 +430,25 @@ int arm_spe_pkt_desc(const struct arm_spe_pkt *packet, char *buf, ret = snprintf(buf, buf_len, " NV-SYSREG"); buf += ret; blen -= ret; + } else if ((payload & 0x0a) == 0x08) { + ret = snprintf(buf, buf_len, " SVE"); + buf += ret; + blen -= ret; + if (payload & 0x4) { + ret = snprintf(buf, buf_len, " PRED"); + buf += ret; + blen -= ret; + } + if (payload & 0x80) { + ret = snprintf(buf, buf_len, " SG"); + buf += ret; + blen -= ret; + } + /* Bits [7..4] encode the vector length */ + ret = snprintf(buf, buf_len, " EVLEN%d", + 32 << ((payload >> 4) & 0x7)); + buf += ret; + blen -= ret; } else if (payload & 0x4) { ret = snprintf(buf, buf_len, " SIMD-FP"); buf += ret; -- 2.17.1
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