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Subject[PATCH 2/4] perf: arm-spe: Add support for ARMv8.3-SPE
Date
Armv8.3 extends the SPE by adding:
- Alignment field in the Events packet, and filtering on this event
using PMSEVFR_EL1.
- Support for the Scalable Vector Extension (SVE).

The main additions for SVE are:
- Recording the vector length for SVE operations in the Operation Type
packet. It is not possible to filter on vector length.
- Incomplete predicate and empty predicate fields in the Events packet,
and filtering on these events using PMSEVFR_EL1.

Add the corresponding decode process of Events packet and Operation Type
packet in perf tool.

Signed-off-by: Wei Li <liwei391@huawei.com>
---
.../arm-spe-decoder/arm-spe-pkt-decoder.c | 69 ++++++++++++++++++-
1 file changed, 67 insertions(+), 2 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 b94001b756c7..10a3692839de 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
@@ -347,6 +347,24 @@ int arm_spe_pkt_desc(const struct arm_spe_pkt *packet, char *buf,
blen -= ret;
}
}
+ if (idx > 2) {
+ if (payload & 0x800) {
+ ret = snprintf(buf, buf_len, " ALIGNMENT");
+ buf += ret;
+ blen -= ret;
+ }
+ if (payload & 0x20000) {
+ ret = snprintf(buf, buf_len, " SVE-PRED-PARTIAL");
+ buf += ret;
+ blen -= ret;
+ }
+ if (payload & 0x40000) {
+ ret = snprintf(buf, buf_len, " SVE-PRED-EMPTY");
+ buf += ret;
+ blen -= ret;
+ }
+ }
+
if (ret < 0)
return ret;
blen -= ret;
@@ -354,8 +372,38 @@ 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 ?
- "COND-SELECT" : "INSN-OTHER");
+ case 0: {
+ if (payload & 0x8) {
+ size_t blen = buf_len;
+
+ ret = snprintf(buf, buf_len, "SVE-OTHER");
+ buf += ret;
+ blen -= ret;
+ if (payload & 0x2) {
+ ret = snprintf(buf, buf_len, " FP");
+ buf += ret;
+ blen -= ret;
+ }
+ if (payload & 0x4) {
+ ret = snprintf(buf, buf_len, " PRED");
+ buf += ret;
+ blen -= ret;
+ }
+ if (payload & 0x70) {
+ ret = snprintf(buf, buf_len, " EVL %d",
+ 32 << ((payload & 0x70) >> 4));
+ buf += ret;
+ blen -= ret;
+ }
+ if (ret < 0)
+ return ret;
+ blen -= ret;
+ return buf_len - blen;
+ } else {
+ return snprintf(buf, buf_len, "%s", payload & 0x1 ?
+ "COND-SELECT" : "INSN-OTHER");
+ }
+ }
case 1: {
size_t blen = buf_len;

@@ -385,6 +433,23 @@ int arm_spe_pkt_desc(const struct arm_spe_pkt *packet, char *buf,
ret = snprintf(buf, buf_len, " SIMD-FP");
buf += ret;
blen -= ret;
+ } else if (payload & 0x8) {
+ if (payload & 0x4) {
+ ret = snprintf(buf, buf_len, " PRED");
+ buf += ret;
+ blen -= ret;
+ }
+ if (payload & 0x70) {
+ ret = snprintf(buf, buf_len, " EVL %d",
+ 32 << ((payload & 0x70) >> 4));
+ buf += ret;
+ blen -= ret;
+ }
+ if (payload & 0x80) {
+ ret = snprintf(buf, buf_len, " SG");
+ buf += ret;
+ blen -= ret;
+ }
}
if (ret < 0)
return ret;
--
2.17.1
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