From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: linux-kernel@vger.kernel.org,
Adrian Hunter <adrian.hunter@intel.com>,
Jiri Olsa <jolsa@redhat.com>,
Arnaldo Carvalho de Melo <acme@redhat.com>
Subject: [PATCH 07/22] perf tools: Add new Intel PT packet definitions
Date: Wed, 26 Aug 2015 12:57:57 -0300 [thread overview]
Message-ID: <1440604692-26918-8-git-send-email-acme@kernel.org> (raw)
In-Reply-To: <1440604692-26918-1-git-send-email-acme@kernel.org>
From: Adrian Hunter <adrian.hunter@intel.com>
New features have been added to Intel PT which include a number of new
packet definitions.
This patch adds packet definitions for new packets: TMA, MTC, CYC, VMCS,
TRACESTOP and MNT. Also another bit in PIP is defined.
This patch only adds support for the definitions. Later patches add
support for decoding TMA, MTC, CYC and TRACESTOP which is where those
packets are explained.
VMCS and the newly defined bit in PIP are used with virtualization which
is not supported yet. MNT is a maintenance packet which the decoder
should ignore.
For details, refer to the June 2015 or later Intel 64 and IA-32
Architectures SDM Chapter 36 Intel Processor Trace.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1437150840-31811-19-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
.../perf/util/intel-pt-decoder/intel-pt-decoder.c | 70 +++++++++-
.../util/intel-pt-decoder/intel-pt-pkt-decoder.c | 142 +++++++++++++++++++--
.../util/intel-pt-decoder/intel-pt-pkt-decoder.h | 6 +
3 files changed, 201 insertions(+), 17 deletions(-)
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 56790ea1e88e..4a0e9fb1d173 100644
--- a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
+++ b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
@@ -923,6 +923,7 @@ static int intel_pt_walk_psbend(struct intel_pt_decoder *decoder)
case INTEL_PT_TIP_PGE:
case INTEL_PT_TIP:
case INTEL_PT_TNT:
+ case INTEL_PT_TRACESTOP:
case INTEL_PT_BAD:
case INTEL_PT_PSB:
intel_pt_log("ERROR: Unexpected packet\n");
@@ -935,6 +936,9 @@ static int intel_pt_walk_psbend(struct intel_pt_decoder *decoder)
intel_pt_calc_tsc_timestamp(decoder);
break;
+ case INTEL_PT_TMA:
+ break;
+
case INTEL_PT_CBR:
decoder->cbr = decoder->packet.payload;
break;
@@ -944,7 +948,7 @@ static int intel_pt_walk_psbend(struct intel_pt_decoder *decoder)
break;
case INTEL_PT_PIP:
- decoder->cr3 = decoder->packet.payload;
+ decoder->cr3 = decoder->packet.payload & (BIT63 - 1);
break;
case INTEL_PT_FUP:
@@ -956,6 +960,12 @@ static int intel_pt_walk_psbend(struct intel_pt_decoder *decoder)
intel_pt_update_in_tx(decoder);
break;
+ case INTEL_PT_MTC:
+ break;
+
+ case INTEL_PT_CYC:
+ case INTEL_PT_VMCS:
+ case INTEL_PT_MNT:
case INTEL_PT_PAD:
default:
break;
@@ -983,8 +993,10 @@ static int intel_pt_walk_fup_tip(struct intel_pt_decoder *decoder)
switch (decoder->packet.type) {
case INTEL_PT_TNT:
case INTEL_PT_FUP:
+ case INTEL_PT_TRACESTOP:
case INTEL_PT_PSB:
case INTEL_PT_TSC:
+ case INTEL_PT_TMA:
case INTEL_PT_CBR:
case INTEL_PT_MODE_TSX:
case INTEL_PT_BAD:
@@ -1032,13 +1044,21 @@ static int intel_pt_walk_fup_tip(struct intel_pt_decoder *decoder)
return 0;
case INTEL_PT_PIP:
- decoder->cr3 = decoder->packet.payload;
+ decoder->cr3 = decoder->packet.payload & (BIT63 - 1);
+ break;
+
+ case INTEL_PT_MTC:
+ break;
+
+ case INTEL_PT_CYC:
break;
case INTEL_PT_MODE_EXEC:
decoder->exec_mode = decoder->packet.payload;
break;
+ case INTEL_PT_VMCS:
+ case INTEL_PT_MNT:
case INTEL_PT_PAD:
break;
@@ -1122,6 +1142,9 @@ next:
}
return intel_pt_walk_fup_tip(decoder);
+ case INTEL_PT_TRACESTOP:
+ break;
+
case INTEL_PT_PSB:
intel_pt_clear_stack(&decoder->stack);
err = intel_pt_walk_psbend(decoder);
@@ -1132,13 +1155,22 @@ next:
break;
case INTEL_PT_PIP:
- decoder->cr3 = decoder->packet.payload;
+ decoder->cr3 = decoder->packet.payload & (BIT63 - 1);
+ break;
+
+ case INTEL_PT_MTC:
break;
case INTEL_PT_TSC:
intel_pt_calc_tsc_timestamp(decoder);
break;
+ case INTEL_PT_TMA:
+ break;
+
+ case INTEL_PT_CYC:
+ break;
+
case INTEL_PT_CBR:
decoder->cbr = decoder->packet.payload;
break;
@@ -1162,6 +1194,8 @@ next:
return intel_pt_bug(decoder);
case INTEL_PT_PSBEND:
+ case INTEL_PT_VMCS:
+ case INTEL_PT_MNT:
case INTEL_PT_PAD:
break;
@@ -1202,16 +1236,25 @@ static int intel_pt_walk_psb(struct intel_pt_decoder *decoder)
}
break;
+ case INTEL_PT_MTC:
+ break;
+
case INTEL_PT_TSC:
intel_pt_calc_tsc_timestamp(decoder);
break;
+ case INTEL_PT_TMA:
+ break;
+
+ case INTEL_PT_CYC:
+ break;
+
case INTEL_PT_CBR:
decoder->cbr = decoder->packet.payload;
break;
case INTEL_PT_PIP:
- decoder->cr3 = decoder->packet.payload;
+ decoder->cr3 = decoder->packet.payload & (BIT63 - 1);
break;
case INTEL_PT_MODE_EXEC:
@@ -1222,6 +1265,7 @@ static int intel_pt_walk_psb(struct intel_pt_decoder *decoder)
intel_pt_update_in_tx(decoder);
break;
+ case INTEL_PT_TRACESTOP:
case INTEL_PT_TNT:
intel_pt_log("ERROR: Unexpected packet\n");
if (decoder->ip)
@@ -1240,6 +1284,8 @@ static int intel_pt_walk_psb(struct intel_pt_decoder *decoder)
return 0;
case INTEL_PT_PSB:
+ case INTEL_PT_VMCS:
+ case INTEL_PT_MNT:
case INTEL_PT_PAD:
default:
break;
@@ -1282,16 +1328,25 @@ static int intel_pt_walk_to_ip(struct intel_pt_decoder *decoder)
intel_pt_set_last_ip(decoder);
break;
+ case INTEL_PT_MTC:
+ break;
+
case INTEL_PT_TSC:
intel_pt_calc_tsc_timestamp(decoder);
break;
+ case INTEL_PT_TMA:
+ break;
+
+ case INTEL_PT_CYC:
+ break;
+
case INTEL_PT_CBR:
decoder->cbr = decoder->packet.payload;
break;
case INTEL_PT_PIP:
- decoder->cr3 = decoder->packet.payload;
+ decoder->cr3 = decoder->packet.payload & (BIT63 - 1);
break;
case INTEL_PT_MODE_EXEC:
@@ -1308,6 +1363,9 @@ static int intel_pt_walk_to_ip(struct intel_pt_decoder *decoder)
case INTEL_PT_BAD: /* Does not happen */
return intel_pt_bug(decoder);
+ case INTEL_PT_TRACESTOP:
+ break;
+
case INTEL_PT_PSB:
err = intel_pt_walk_psb(decoder);
if (err)
@@ -1321,6 +1379,8 @@ static int intel_pt_walk_to_ip(struct intel_pt_decoder *decoder)
case INTEL_PT_TNT:
case INTEL_PT_PSBEND:
+ case INTEL_PT_VMCS:
+ case INTEL_PT_MNT:
case INTEL_PT_PAD:
default:
break;
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 988c82c6652d..b1257c816310 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
@@ -24,6 +24,8 @@
#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
@@ -46,15 +48,21 @@ static const char * const packet_name[] = {
[INTEL_PT_TIP_PGD] = "TIP.PGD",
[INTEL_PT_TIP_PGE] = "TIP.PGE",
[INTEL_PT_TSC] = "TSC",
+ [INTEL_PT_TMA] = "TMA",
[INTEL_PT_MODE_EXEC] = "MODE.Exec",
[INTEL_PT_MODE_TSX] = "MODE.TSX",
+ [INTEL_PT_MTC] = "MTC",
[INTEL_PT_TIP] = "TIP",
[INTEL_PT_FUP] = "FUP",
+ [INTEL_PT_CYC] = "CYC",
+ [INTEL_PT_VMCS] = "VMCS",
[INTEL_PT_PSB] = "PSB",
[INTEL_PT_PSBEND] = "PSBEND",
[INTEL_PT_CBR] = "CBR",
+ [INTEL_PT_TRACESTOP] = "TraceSTOP",
[INTEL_PT_PIP] = "PIP",
[INTEL_PT_OVF] = "OVF",
+ [INTEL_PT_MNT] = "MNT",
};
const char *intel_pt_pkt_name(enum intel_pt_pkt_type type)
@@ -96,10 +104,18 @@ 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;
return 8;
}
+static int intel_pt_get_tracestop(struct intel_pt_pkt *packet)
+{
+ packet->type = INTEL_PT_TRACESTOP;
+ return 2;
+}
+
static int intel_pt_get_cbr(const unsigned char *buf, size_t len,
struct intel_pt_pkt *packet)
{
@@ -110,6 +126,24 @@ static int intel_pt_get_cbr(const unsigned char *buf, size_t len,
return 4;
}
+static int intel_pt_get_vmcs(const unsigned char *buf, size_t len,
+ struct intel_pt_pkt *packet)
+{
+ unsigned int count = (52 - 5) >> 3;
+
+ if (count < 1 || count > 7)
+ return INTEL_PT_BAD_PACKET;
+
+ if (len < count + 2)
+ return INTEL_PT_NEED_MORE_BYTES;
+
+ packet->type = INTEL_PT_VMCS;
+ packet->count = count;
+ memcpy_le64(&packet->payload, buf + 2, count);
+
+ return count + 2;
+}
+
static int intel_pt_get_ovf(struct intel_pt_pkt *packet)
{
packet->type = INTEL_PT_OVF;
@@ -139,12 +173,49 @@ static int intel_pt_get_psbend(struct intel_pt_pkt *packet)
return 2;
}
+static int intel_pt_get_tma(const unsigned char *buf, size_t len,
+ struct intel_pt_pkt *packet)
+{
+ if (len < 7)
+ return INTEL_PT_NEED_MORE_BYTES;
+
+ packet->type = INTEL_PT_TMA;
+ packet->payload = buf[2] | (buf[3] << 8);
+ packet->count = buf[5] | ((buf[6] & BIT(0)) << 8);
+ return 7;
+}
+
static int intel_pt_get_pad(struct intel_pt_pkt *packet)
{
packet->type = INTEL_PT_PAD;
return 1;
}
+static int intel_pt_get_mnt(const unsigned char *buf, size_t len,
+ struct intel_pt_pkt *packet)
+{
+ if (len < 11)
+ return INTEL_PT_NEED_MORE_BYTES;
+ packet->type = INTEL_PT_MNT;
+ memcpy_le64(&packet->payload, buf + 3, 8);
+ return 11
+;
+}
+
+static int intel_pt_get_3byte(const unsigned char *buf, size_t len,
+ struct intel_pt_pkt *packet)
+{
+ if (len < 3)
+ return INTEL_PT_NEED_MORE_BYTES;
+
+ switch (buf[2]) {
+ case 0x88: /* MNT */
+ return intel_pt_get_mnt(buf, len, packet);
+ default:
+ return INTEL_PT_BAD_PACKET;
+ }
+}
+
static int intel_pt_get_ext(const unsigned char *buf, size_t len,
struct intel_pt_pkt *packet)
{
@@ -156,14 +227,22 @@ static int intel_pt_get_ext(const unsigned char *buf, size_t len,
return intel_pt_get_long_tnt(buf, len, packet);
case 0x43: /* PIP */
return intel_pt_get_pip(buf, len, packet);
+ case 0x83: /* TraceStop */
+ return intel_pt_get_tracestop(packet);
case 0x03: /* CBR */
return intel_pt_get_cbr(buf, len, packet);
+ case 0xc8: /* VMCS */
+ return intel_pt_get_vmcs(buf, len, packet);
case 0xf3: /* OVF */
return intel_pt_get_ovf(packet);
case 0x82: /* PSB */
return intel_pt_get_psb(buf, len, packet);
case 0x23: /* PSBEND */
return intel_pt_get_psbend(packet);
+ case 0x73: /* TMA */
+ return intel_pt_get_tma(buf, len, packet);
+ case 0xC3: /* 3-byte header */
+ return intel_pt_get_3byte(buf, len, packet);
default:
return INTEL_PT_BAD_PACKET;
}
@@ -187,6 +266,28 @@ static int intel_pt_get_short_tnt(unsigned int byte,
return 1;
}
+static int intel_pt_get_cyc(unsigned int byte, const unsigned char *buf,
+ size_t len, struct intel_pt_pkt *packet)
+{
+ unsigned int offs = 1, shift;
+ uint64_t payload = byte >> 3;
+
+ byte >>= 2;
+ len -= 1;
+ for (shift = 5; byte & 1; shift += 7) {
+ if (offs > 9)
+ return INTEL_PT_BAD_PACKET;
+ if (len < offs)
+ return INTEL_PT_NEED_MORE_BYTES;
+ byte = buf[offs++];
+ payload |= (byte >> 1) << shift;
+ }
+
+ packet->type = INTEL_PT_CYC;
+ packet->payload = payload;
+ return offs;
+}
+
static int intel_pt_get_ip(enum intel_pt_pkt_type type, unsigned int byte,
const unsigned char *buf, size_t len,
struct intel_pt_pkt *packet)
@@ -269,6 +370,16 @@ static int intel_pt_get_tsc(const unsigned char *buf, size_t len,
return 8;
}
+static int intel_pt_get_mtc(const unsigned char *buf, size_t len,
+ struct intel_pt_pkt *packet)
+{
+ if (len < 2)
+ return INTEL_PT_NEED_MORE_BYTES;
+ packet->type = INTEL_PT_MTC;
+ packet->payload = buf[1];
+ return 2;
+}
+
static int intel_pt_do_get_packet(const unsigned char *buf, size_t len,
struct intel_pt_pkt *packet)
{
@@ -288,6 +399,9 @@ static int intel_pt_do_get_packet(const unsigned char *buf, size_t len,
return intel_pt_get_short_tnt(byte, packet);
}
+ if ((byte & 2))
+ return intel_pt_get_cyc(byte, buf, len, packet);
+
switch (byte & 0x1f) {
case 0x0D:
return intel_pt_get_ip(INTEL_PT_TIP, byte, buf, len, packet);
@@ -305,6 +419,8 @@ static int intel_pt_do_get_packet(const unsigned char *buf, size_t len,
return intel_pt_get_mode(buf, len, packet);
case 0x19:
return intel_pt_get_tsc(buf, len, packet);
+ case 0x59:
+ return intel_pt_get_mtc(buf, len, packet);
default:
return INTEL_PT_BAD_PACKET;
}
@@ -329,7 +445,7 @@ int intel_pt_get_packet(const unsigned char *buf, size_t len,
int intel_pt_pkt_desc(const struct intel_pt_pkt *packet, char *buf,
size_t buf_len)
{
- int ret, i;
+ int ret, i, nr;
unsigned long long payload = packet->payload;
const char *name = intel_pt_pkt_name(packet->type);
@@ -338,6 +454,7 @@ int intel_pt_pkt_desc(const struct intel_pt_pkt *packet, char *buf,
case INTEL_PT_PAD:
case INTEL_PT_PSB:
case INTEL_PT_PSBEND:
+ case INTEL_PT_TRACESTOP:
case INTEL_PT_OVF:
return snprintf(buf, buf_len, "%s", name);
case INTEL_PT_TNT: {
@@ -371,17 +488,16 @@ int intel_pt_pkt_desc(const struct intel_pt_pkt *packet, char *buf,
case INTEL_PT_FUP:
if (!(packet->count))
return snprintf(buf, buf_len, "%s no ip", name);
+ case INTEL_PT_CYC:
+ case INTEL_PT_VMCS:
+ case INTEL_PT_MTC:
+ case INTEL_PT_MNT:
case INTEL_PT_CBR:
- return snprintf(buf, buf_len, "%s 0x%llx", name, payload);
case INTEL_PT_TSC:
- if (packet->count)
- return snprintf(buf, buf_len,
- "%s 0x%llx CTC 0x%x FC 0x%x",
- name, payload, packet->count & 0xffff,
- (packet->count >> 16) & 0x1ff);
- else
- return snprintf(buf, buf_len, "%s 0x%llx",
- name, payload);
+ return snprintf(buf, buf_len, "%s 0x%llx", name, payload);
+ case INTEL_PT_TMA:
+ 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);
case INTEL_PT_MODE_TSX:
@@ -389,8 +505,10 @@ 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:
- ret = snprintf(buf, buf_len, "%s 0x%llx",
- name, payload);
+ nr = packet->payload & NR_FLAG ? 1 : 0;
+ payload &= ~NR_FLAG;
+ ret = snprintf(buf, buf_len, "%s 0x%llx (NR=%d)",
+ name, payload, nr);
return ret;
default:
break;
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 53404fa942b3..781bb79883bd 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
@@ -37,15 +37,21 @@ enum intel_pt_pkt_type {
INTEL_PT_TIP_PGD,
INTEL_PT_TIP_PGE,
INTEL_PT_TSC,
+ INTEL_PT_TMA,
INTEL_PT_MODE_EXEC,
INTEL_PT_MODE_TSX,
+ INTEL_PT_MTC,
INTEL_PT_TIP,
INTEL_PT_FUP,
+ INTEL_PT_CYC,
+ INTEL_PT_VMCS,
INTEL_PT_PSB,
INTEL_PT_PSBEND,
INTEL_PT_CBR,
+ INTEL_PT_TRACESTOP,
INTEL_PT_PIP,
INTEL_PT_OVF,
+ INTEL_PT_MNT,
};
struct intel_pt_pkt {
--
2.1.0
next prev parent reply other threads:[~2015-08-26 16:00 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-26 15:57 [GIT PULL 00/22] perf/core improvements and fixes Arnaldo Carvalho de Melo
2015-08-26 15:57 ` [PATCH 01/22] perf tools: Fix tarball build broken by pt/bts Arnaldo Carvalho de Melo
2015-08-26 15:57 ` [PATCH 02/22] perf annotate: Reset the dso find_symbol cache when removing symbols Arnaldo Carvalho de Melo
2015-08-26 15:57 ` [PATCH 03/22] perf ui tui progress: Implement the ui_progress_ops->finish() method Arnaldo Carvalho de Melo
2015-08-26 15:57 ` [PATCH 04/22] perf ordered_events: Clear the progress bar at the end of a flush Arnaldo Carvalho de Melo
2015-08-26 15:57 ` [PATCH 05/22] perf tools: Fix Intel PT 'instructions' sample period Arnaldo Carvalho de Melo
2015-08-26 15:57 ` [PATCH 06/22] perf tools: Add Intel PT support for PSB periods Arnaldo Carvalho de Melo
2015-08-26 15:57 ` Arnaldo Carvalho de Melo [this message]
2015-08-26 15:57 ` [PATCH 08/22] perf tools: Pass Intel PT information for decoding MTC and CYC Arnaldo Carvalho de Melo
2015-08-26 15:57 ` [PATCH 09/22] perf tools: Add Intel PT support for decoding MTC packets Arnaldo Carvalho de Melo
2015-08-26 15:58 ` [PATCH 10/22] perf tools: Add Intel PT support for using " Arnaldo Carvalho de Melo
2015-08-26 15:58 ` [PATCH 11/22] perf tools: Add Intel PT support for decoding CYC packets Arnaldo Carvalho de Melo
2015-08-26 15:58 ` [PATCH 12/22] perf tools: Add Intel PT support for using " Arnaldo Carvalho de Melo
2015-08-26 15:58 ` [PATCH 13/22] perf tools: Add Intel PT support for decoding TRACESTOP packets Arnaldo Carvalho de Melo
2015-08-26 15:58 ` [PATCH 14/22] perf tools: Update Intel PT documentation Arnaldo Carvalho de Melo
2015-08-26 15:58 ` [PATCH 15/22] perf probe: Prevent segfault when reading probe point with absolute address Arnaldo Carvalho de Melo
2015-08-26 15:58 ` [PATCH 16/22] perf tools: Remove export.h from MANIFEST Arnaldo Carvalho de Melo
2015-08-26 15:58 ` [PATCH 17/22] tools build: Allow duplicate objects in the object list Arnaldo Carvalho de Melo
2015-08-26 15:58 ` [PATCH 18/22] perf probe: Fix list result when symbol can't be found Arnaldo Carvalho de Melo
2015-08-26 15:58 ` [PATCH 19/22] perf probe: Fix list result when address is zero Arnaldo Carvalho de Melo
2015-08-26 15:58 ` [PATCH 20/22] perf probe: Fix error reported when offset without function Arnaldo Carvalho de Melo
2015-08-26 15:58 ` [PATCH 21/22] perf probe: Support probing at absolute address Arnaldo Carvalho de Melo
2015-08-26 15:58 ` [PATCH 22/22] tracing/uprobes: Do not print '0x (null)' when offset is 0 Arnaldo Carvalho de Melo
2015-08-28 6:24 ` [GIT PULL 00/22] perf/core improvements and fixes Ingo Molnar
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