perf intel-pt: pkt-decoder: Add MODE.Exec IFLAG bit

As of Intel SDM (https://www.intel.com/sdm) version 076, there is a new
Intel PT feature called Event Trace which adds a bit to the existing
MODE.Exec packet to record the interrupt flag. Amend the packet decoder and
packet decoder test accordingly.
Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/r/20220124084201.2699795-5-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/arch/x86/tests/intel-pt-pkt-decoder-test.c

@@ -70,8 +70,11 @@ static struct test_data {
 	{8, {0x02, 0x43, 3, 4, 6, 8, 10, 12}, 0, {INTEL_PT_PIP, 0, 0xC0A08060403}, 0, 0 },
 	/* Mode Exec Packet */
 	{2, {0x99, 0x00}, 0, {INTEL_PT_MODE_EXEC, 0, 16}, 0, 0 },
-	{2, {0x99, 0x01}, 0, {INTEL_PT_MODE_EXEC, 0, 64}, 0, 0 },
-	{2, {0x99, 0x02}, 0, {INTEL_PT_MODE_EXEC, 0, 32}, 0, 0 },
+	{2, {0x99, 0x01}, 0, {INTEL_PT_MODE_EXEC, 1, 64}, 0, 0 },
+	{2, {0x99, 0x02}, 0, {INTEL_PT_MODE_EXEC, 2, 32}, 0, 0 },
+	{2, {0x99, 0x04}, 0, {INTEL_PT_MODE_EXEC, 4, 16}, 0, 0 },
+	{2, {0x99, 0x05}, 0, {INTEL_PT_MODE_EXEC, 5, 64}, 0, 0 },
+	{2, {0x99, 0x06}, 0, {INTEL_PT_MODE_EXEC, 6, 32}, 0, 0 },
 	/* Mode TSX Packet */
 	{2, {0x99, 0x20}, 0, {INTEL_PT_MODE_TSX, 0, 0}, 0, 0 },
 	{2, {0x99, 0x21}, 0, {INTEL_PT_MODE_TSX, 0, 1}, 0, 0 },

tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c

@@ -504,6 +504,7 @@ static int intel_pt_get_mode(const unsigned char *buf, size_t len,
 	switch (buf[1] >> 5) {
 	case 0:
 		packet->type = INTEL_PT_MODE_EXEC;
+		packet->count = buf[1];
 		switch (buf[1] & 3) {
 		case 0:
 			packet->payload = 16;
@@ -741,7 +742,8 @@ int intel_pt_pkt_desc(const struct intel_pt_pkt *packet, char *buf,
 		return snprintf(buf, buf_len, "%s CTC 0x%x FC 0x%x", name,
 				(unsigned)payload, packet->count);
 	case INTEL_PT_MODE_EXEC:
-		return snprintf(buf, buf_len, "%s %lld", name, payload);
+		return snprintf(buf, buf_len, "%s IF:%d %lld",
+				name, !!(packet->count & 4), payload);
 	case INTEL_PT_MODE_TSX:
 		return snprintf(buf, buf_len, "%s TXAbort:%u InTX:%u",
 				name, (unsigned)(payload >> 1) & 1,