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.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

5 files changed, 16 insertions, 18 deletions

diff --git a/tools/perf/arch/x86/tests/intel-pt-pkt-decoder-test.c b/tools/perf/arch/x86/tests/intel-pt-pkt-decoder-test.c
index 901bf1f449c4..c933e3dcd0a8 100644
--- a/tools/perf/arch/x86/tests/intel-pt-pkt-decoder-test.c
+++ b/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 },
diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
index 6df52d3c3f7e..cfaa091c935c 100644
--- a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
+++ b/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 @@ next:
 			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;
 
diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.h b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.h
index ae13f3251536..b9564c93fca7 100644
--- a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.h
+++ b/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;
diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c b/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c
index 4ce109993e74..02a3395d6ce3 100644
--- a/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c
+++ b/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);
diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.h b/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.h
index 17ca9b56d72f..996090cb84f6 100644
--- a/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.h
+++ b/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,