[PATCH RESEND v1 13/13] perf arm-spe: Add support for ARMv8.3-SPE

[Leo Yan]

From: Wei Li <liwei391@xxxxxxxxxx>

This patch is to support Armv8.3 extension for SPE, it adds alignment
field in the Events packet and it supports the Scalable Vector Extension
(SVE) for Operation packet and Events packet with two additions:

  - The vector length for SVE operations in the Operation Type packet;
  - The incomplete predicate and empty predicate fields in the Events
    packet.

Signed-off-by: Wei Li <liwei391@xxxxxxxxxx>
---
 .../arm-spe-decoder/arm-spe-pkt-decoder.c     | 95 ++++++++++++++++++-
 .../arm-spe-decoder/arm-spe-pkt-decoder.h     |  6 ++
 2 files changed, 98 insertions(+), 3 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 095f344ee26c..637655e28b9f 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
@@ -346,14 +346,77 @@ int arm_spe_pkt_desc(const struct arm_spe_pkt *packet, char *buf,
 				blen -= ret;
 			}
 		}
+
+		if (idx > 2) {
+			if (payload & SPE_EVT_PKT_ALIGNMENT) {
+				ret = snprintf(buf, buf_len, " ALIGNMENT");
+				if (ret < 0)
+					return ret;
+				buf += ret;
+				blen -= ret;
+			}
+			if (payload & SPE_EVT_PKT_SVE_PARTIAL_PREDICATE) {
+				ret = snprintf(buf, buf_len, " SVE-PARTIAL-PRED");
+				if (ret < 0)
+					return ret;
+				buf += ret;
+				blen -= ret;
+			}
+			if (payload & SPE_EVT_PKT_SVE_EMPTY_PREDICATE) {
+				ret = snprintf(buf, buf_len, " SVE-EMPTY-PRED");
+				if (ret < 0)
+					return ret;
+				buf += ret;
+				blen -= ret;
+			}
+		}
+
 		return buf_len - blen;
 	}
 	case ARM_SPE_OP_TYPE:
 		switch (idx) {
 		case SPE_OP_PKT_HDR_CLASS_OTHER:
-			return snprintf(buf, buf_len, "%s",
-					payload & SPE_OP_PKT_OTHER_SUBCLASS_COND ?
-					"COND-SELECT" : "INSN-OTHER");
+			blen = buf_len;
+
+			if ((payload & SPE_OP_PKT_OTHER_SVE_SUBCLASS_MASK) ==
+					SPE_OP_PKT_OTHER_SUBCLASS_SVG_OP) {
+				ret = snprintf(buf, buf_len, "SVE-OTHER");
+				buf += ret;
+				blen -= ret;
+
+				/* Effective Venctor Length */
+				ret = snprintf(buf, buf_len, " EVL %d",
+					32 << ((payload & SPE_OP_PKT_SVE_EVL_MASK) >>
+						SPE_OP_PKT_SVE_EVL_SHIFT));
+				buf += ret;
+				blen -= ret;
+
+				if (payload & SPE_OP_PKT_SVE_FP) {
+					ret = snprintf(buf, buf_len, " FP");
+					buf += ret;
+					blen -= ret;
+				}
+				if (payload & SPE_OP_PKT_SVE_PRED) {
+					ret = snprintf(buf, buf_len, " PRED");
+					buf += ret;
+					blen -= ret;
+				}
+			} else {
+				ret = snprintf(buf, buf_len, "OTHER");
+				buf += ret;
+				blen -= ret;
+
+				ret = snprintf(buf, buf_len, " %s",
+					       payload & SPE_OP_PKT_OTHER_SUBCLASS_COND ?
+					       "COND-SELECT" : "UNCOND");
+				buf += ret;
+				blen -= ret;
+			}
+
+			if (ret < 0)
+				return ret;
+			return buf_len - blen;
+
 		case SPE_OP_PKT_HDR_CLASS_LD_ST_ATOMIC:
 			blen = buf_len;
 
@@ -416,6 +479,32 @@ int arm_spe_pkt_desc(const struct arm_spe_pkt *packet, char *buf,
 					return ret;
 				buf += ret;
 				blen -= ret;
+			} else if ((payload & SPE_OP_PKT_LDST_SUBCLASS_SVE_MASK) ==
+					SPE_OP_PKT_LDST_SUBCLASS_SVE) {
+				/* Effective Venctor Length */
+				ret = snprintf(buf, buf_len, " EVL %d",
+					32 << ((payload & SPE_OP_PKT_SVE_EVL_MASK) >>
+						SPE_OP_PKT_SVE_EVL_SHIFT));
+				if (ret < 0)
+					return ret;
+
+				buf += ret;
+				blen -= ret;
+
+				if (payload & SPE_OP_PKT_SVE_PRED) {
+					ret = snprintf(buf, buf_len, " PRED");
+					if (ret < 0)
+						return ret;
+					buf += ret;
+					blen -= ret;
+				}
+				if (payload & SPE_OP_PKT_SVE_SG) {
+					ret = snprintf(buf, buf_len, " SG");
+					if (ret < 0)
+						return ret;
+					buf += ret;
+					blen -= ret;
+				}
 			}
 			return buf_len - blen;
 		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 295ff8779ce4..1a917a11b395 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
@@ -140,6 +140,12 @@ struct arm_spe_pkt {
 #define SPE_OP_PKT_LDST_SUBCLASS_SVE_MASK	(0xa)
 #define SPE_OP_PKT_LDST_SUBCLASS_SVE		(0x8)
 
+#define SPE_OP_PKT_SVE_SG			BIT(7)
+#define SPE_OP_PKT_SVE_EVL_MASK			(0x70)
+#define SPE_OP_PKT_SVE_EVL_SHIFT		(4)
+#define SPE_OP_PKT_SVE_PRED			BIT(2)
+#define SPE_OP_PKT_SVE_FP			BIT(1)
+
 #define SPE_OP_PKT_AR				BIT(4)
 #define SPE_OP_PKT_EXCL				BIT(3)
 #define SPE_OP_PKT_AT				BIT(2)
-- 
2.17.1