perf intel-pt: Retain the last PIP packet payload as is

Retain the PIP packet payload as is, instead of just the CR3, because it
contains also the VMX NR flag which is needed to track VM-Entry.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/r/20210218095801.19576-4-adrian.hunter@intel.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

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

@@ -66,8 +66,8 @@ struct test_data {
 	{7, {0x9d, 1, 2, 3, 4, 5, 6}, 0, {INTEL_PT_FUP, 4, 0x60504030201}, 0, 0 },
 	{9, {0xdd, 1, 2, 3, 4, 5, 6, 7, 8}, 0, {INTEL_PT_FUP, 6, 0x807060504030201}, 0, 0 },
 	/* Paging Information Packet */
-	{8, {0x02, 0x43, 2, 4, 6, 8, 10, 12}, 0, {INTEL_PT_PIP, 0, 0x60504030201}, 0, 0 },
-	{8, {0x02, 0x43, 3, 4, 6, 8, 10, 12}, 0, {INTEL_PT_PIP, 0, 0x60504030201 | (1ULL << 63)}, 0, 0 },
+	{8, {0x02, 0x43, 2, 4, 6, 8, 10, 12}, 0, {INTEL_PT_PIP, 0, 0xC0A08060402}, 0, 0 },
+	{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 },

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

@@ -126,7 +126,7 @@ struct intel_pt_decoder {
 	uint64_t pos;
 	uint64_t last_ip;
 	uint64_t ip;
-	uint64_t cr3;
+	uint64_t pip_payload;
 	uint64_t timestamp;
 	uint64_t tsc_timestamp;
 	uint64_t ref_timestamp;
@@ -1757,7 +1757,7 @@ static int intel_pt_walk_psbend(struct intel_pt_decoder *decoder)
 			break;
 
 		case INTEL_PT_PIP:
-			decoder->cr3 = decoder->packet.payload & (BIT63 - 1);
+			decoder->pip_payload = decoder->packet.payload;
 			break;
 
 		case INTEL_PT_FUP:
@@ -1884,7 +1884,7 @@ static int intel_pt_walk_fup_tip(struct intel_pt_decoder *decoder)
 			return 0;
 
 		case INTEL_PT_PIP:
-			decoder->cr3 = decoder->packet.payload & (BIT63 - 1);
+			decoder->pip_payload = decoder->packet.payload;
 			break;
 
 		case INTEL_PT_MTC:
@@ -2297,7 +2297,7 @@ static int intel_pt_walk_trace(struct intel_pt_decoder *decoder)
 			return err;
 
 		case INTEL_PT_PIP:
-			decoder->cr3 = decoder->packet.payload & (BIT63 - 1);
+			decoder->pip_payload = decoder->packet.payload;
 			break;
 
 		case INTEL_PT_MTC:
@@ -2536,7 +2536,7 @@ static int intel_pt_walk_psb(struct intel_pt_decoder *decoder)
 			break;
 
 		case INTEL_PT_PIP:
-			decoder->cr3 = decoder->packet.payload & (BIT63 - 1);
+			decoder->pip_payload = decoder->packet.payload;
 			break;
 
 		case INTEL_PT_MODE_EXEC:
@@ -2655,7 +2655,7 @@ static int intel_pt_walk_to_ip(struct intel_pt_decoder *decoder)
 			break;
 
 		case INTEL_PT_PIP:
-			decoder->cr3 = decoder->packet.payload & (BIT63 - 1);
+			decoder->pip_payload = decoder->packet.payload;
 			break;
 
 		case INTEL_PT_MODE_EXEC:
@@ -2987,7 +2987,7 @@ const struct intel_pt_state *intel_pt_decode(struct intel_pt_decoder *decoder)
 
 	decoder->state.timestamp = decoder->sample_timestamp;
 	decoder->state.est_timestamp = intel_pt_est_timestamp(decoder);
-	decoder->state.cr3 = decoder->cr3;
+	decoder->state.pip_payload = decoder->pip_payload;
 	decoder->state.tot_insn_cnt = decoder->tot_insn_cnt;
 	decoder->state.tot_cyc_cnt = decoder->sample_tot_cyc_cnt;
 

tools/perf/util/intel-pt-decoder/intel-pt-decoder.h

@@ -204,7 +204,7 @@ struct intel_pt_state {
 	int err;
 	uint64_t from_ip;
 	uint64_t to_ip;
-	uint64_t cr3;
+	uint64_t pip_payload;
 	uint64_t tot_insn_cnt;
 	uint64_t tot_cyc_cnt;
 	uint64_t timestamp;

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

@@ -16,8 +16,6 @@
 
 #define BIT63		((uint64_t)1 << 63)
 
-#define NR_FLAG		BIT63
-
 #if __BYTE_ORDER == __BIG_ENDIAN
 #define le16_to_cpu bswap_16
 #define le32_to_cpu bswap_32
@@ -106,9 +104,7 @@ static int intel_pt_get_pip(const unsigned char *buf, size_t len,
 
 	packet->type = INTEL_PT_PIP;
 	memcpy_le64(&payload, buf + 2, 6);
-	packet->payload = payload >> 1;
-	if (payload & 1)
-		packet->payload |= NR_FLAG;
+	packet->payload = payload;
 
 	return 8;
 }
@@ -719,10 +715,10 @@ int intel_pt_pkt_desc(const struct intel_pt_pkt *packet, char *buf,
 				name, (unsigned)(payload >> 1) & 1,
 				(unsigned)payload & 1);
 	case INTEL_PT_PIP:
-		nr = packet->payload & NR_FLAG ? 1 : 0;
-		payload &= ~NR_FLAG;
+		nr = packet->payload & INTEL_PT_VMX_NR_FLAG ? 1 : 0;
+		payload &= ~INTEL_PT_VMX_NR_FLAG;
 		ret = snprintf(buf, buf_len, "%s 0x%llx (NR=%d)",
-			       name, payload, nr);
+			       name, payload >> 1, nr);
 		return ret;
 	case INTEL_PT_PTWRITE:
 		return snprintf(buf, buf_len, "%s 0x%llx IP:0", name, payload);

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

@@ -21,6 +21,8 @@
 
 #define INTEL_PT_PKT_MAX_SZ		16
 
+#define INTEL_PT_VMX_NR_FLAG		1
+
 enum intel_pt_pkt_type {
 	INTEL_PT_BAD,
 	INTEL_PT_PAD,