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

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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>
This commit is contained in:
Adrian Hunter 2021-02-18 11:57:53 +02:00 committed by Arnaldo Carvalho de Melo
parent b7ecc2d73e
commit 90af7555c3
5 changed files with 16 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
tools/perf/arch/x86/tests/intel-pt-pkt-decoder-test.c
View File

@ -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 },

14
tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
View File

@ -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;

2
tools/perf/util/intel-pt-decoder/intel-pt-decoder.h
View File

@ -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;

12
tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c
View File

@ -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);

2
tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.h
View File

@ -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,