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perf auxtrace arm64: Add support for parsing HiSilicon PCIe Trace packet

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Add support for using 'perf report --dump-raw-trace' to parse PTT packet.

Example usage:

Output will contain raw PTT data and its textual representation, such
as (8DW format):

0 0 0x5810 [0x30]: PERF_RECORD_AUXTRACE size: 0x400000  offset: 0
ref: 0xa5d50c725  idx: 0  tid: -1  cpu: 0
.
. ... HISI PTT data: size 4194304 bytes
.  00000000: 00 00 00 00                                 Prefix
.  00000004: 08 20 00 60                                 Header DW0
.  00000008: ff 02 00 01                                 Header DW1
.  0000000c: 20 08 00 00                                 Header DW2
.  00000010: 10 e7 44 ab                                 Header DW3
.  00000014: 2a a8 1e 01                                 Time
.  00000020: 00 00 00 00                                 Prefix
.  00000024: 01 00 00 60                                 Header DW0
.  00000028: 0f 1e 00 01                                 Header DW1
.  0000002c: 04 00 00 00                                 Header DW2
.  00000030: 40 00 81 02                                 Header DW3
.  00000034: ee 02 00 00                                 Time
....

This patch only add basic parsing support according to the definition of
the PTT packet described in Documentation/trace/hisi-ptt.rst. And the
fields of each packet can be further decoded following the PCIe Spec's
definition of TLP packet.

Signed-off-by: Qi Liu <liuqi115@huawei.com>
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Bjorn Helgaas <helgaas@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Jonathan Cameron <jonathan.cameron@huawei.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Qi Liu <liuqi6124@gmail.com>
Cc: Shameerali Kolothum Thodi <shameerali.kolothum.thodi@huawei.com>
Cc: Shaokun Zhang <zhangshaokun@hisilicon.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Zeng Prime <prime.zeng@huawei.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-pci@vger.kernel.org
Cc: linuxarm@huawei.com
Link: https://lore.kernel.org/r/20220927081400.14364-4-yangyicong@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Qi Liu 2022-09-27 16:14:00 +08:00 committed by Arnaldo Carvalho de Melo
parent 057381a7ec
commit 5e91e57e68
7 changed files with 396 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
tools/perf/util/Build
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@ -118,6 +118,8 @@ perf-$(CONFIG_AUXTRACE) += intel-pt.o
perf-$(CONFIG_AUXTRACE) += intel-bts.o
perf-$(CONFIG_AUXTRACE) += arm-spe.o
perf-$(CONFIG_AUXTRACE) += arm-spe-decoder/
perf-$(CONFIG_AUXTRACE) += hisi-ptt.o
perf-$(CONFIG_AUXTRACE) += hisi-ptt-decoder/
perf-$(CONFIG_AUXTRACE) += s390-cpumsf.o
ifdef CONFIG_LIBOPENCSD

3
tools/perf/util/auxtrace.c
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@ -52,6 +52,7 @@
#include "intel-pt.h"
#include "intel-bts.h"
#include "arm-spe.h"
#include "hisi-ptt.h"
#include "s390-cpumsf.h"
#include "util/mmap.h"
@ -1321,6 +1322,8 @@ int perf_event__process_auxtrace_info(struct perf_session *session,
err = s390_cpumsf_process_auxtrace_info(event, session);
break;
case PERF_AUXTRACE_HISI_PTT:
err = hisi_ptt_process_auxtrace_info(event, session);
break;
case PERF_AUXTRACE_UNKNOWN:
default:
return -EINVAL;

1
tools/perf/util/hisi-ptt-decoder/Build Normal file
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@ -0,0 +1 @@
perf-$(CONFIG_AUXTRACE) += hisi-ptt-pkt-decoder.o

164
tools/perf/util/hisi-ptt-decoder/hisi-ptt-pkt-decoder.c Normal file
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@ -0,0 +1,164 @@
// SPDX-License-Identifier: GPL-2.0
/*
* HiSilicon PCIe Trace and Tuning (PTT) support
* Copyright (c) 2022 HiSilicon Technologies Co., Ltd.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <endian.h>
#include <byteswap.h>
#include <linux/bitops.h>
#include <stdarg.h>
#include "../color.h"
#include "hisi-ptt-pkt-decoder.h"
/*
* For 8DW format, the bit[31:11] of DW0 is always 0x1fffff, which can be
* used to distinguish the data format.
* 8DW format is like:
* bits [ 31:11 ][ 10:0 ]
* |---------------------------------------|-------------------|
* DW0 [ 0x1fffff ][ Reserved (0x7ff) ]
* DW1 [ Prefix ]
* DW2 [ Header DW0 ]
* DW3 [ Header DW1 ]
* DW4 [ Header DW2 ]
* DW5 [ Header DW3 ]
* DW6 [ Reserved (0x0) ]
* DW7 [ Time ]
*
* 4DW format is like:
* bits [31:30] [ 29:25 ][24][23][22][21][ 20:11 ][ 10:0 ]
* |-----|---------|---|---|---|---|-------------|-------------|
* DW0 [ Fmt ][ Type ][T9][T8][TH][SO][ Length ][ Time ]
* DW1 [ Header DW1 ]
* DW2 [ Header DW2 ]
* DW3 [ Header DW3 ]
*/
enum hisi_ptt_8dw_pkt_field_type {
HISI_PTT_8DW_CHK_AND_RSV0,
HISI_PTT_8DW_PREFIX,
HISI_PTT_8DW_HEAD0,
HISI_PTT_8DW_HEAD1,
HISI_PTT_8DW_HEAD2,
HISI_PTT_8DW_HEAD3,
HISI_PTT_8DW_RSV1,
HISI_PTT_8DW_TIME,
HISI_PTT_8DW_TYPE_MAX
};
enum hisi_ptt_4dw_pkt_field_type {
HISI_PTT_4DW_HEAD1,
HISI_PTT_4DW_HEAD2,
HISI_PTT_4DW_HEAD3,
HISI_PTT_4DW_TYPE_MAX
};
static const char * const hisi_ptt_8dw_pkt_field_name[] = {
[HISI_PTT_8DW_PREFIX] = "Prefix",
[HISI_PTT_8DW_HEAD0] = "Header DW0",
[HISI_PTT_8DW_HEAD1] = "Header DW1",
[HISI_PTT_8DW_HEAD2] = "Header DW2",
[HISI_PTT_8DW_HEAD3] = "Header DW3",
[HISI_PTT_8DW_TIME] = "Time"
};
static const char * const hisi_ptt_4dw_pkt_field_name[] = {
[HISI_PTT_4DW_HEAD1] = "Header DW1",
[HISI_PTT_4DW_HEAD2] = "Header DW2",
[HISI_PTT_4DW_HEAD3] = "Header DW3",
};
union hisi_ptt_4dw {
struct {
uint32_t format : 2;
uint32_t type : 5;
uint32_t t9 : 1;
uint32_t t8 : 1;
uint32_t th : 1;
uint32_t so : 1;
uint32_t len : 10;
uint32_t time : 11;
};
uint32_t value;
};
static void hisi_ptt_print_pkt(const unsigned char *buf, int pos, const char *desc)
{
const char *color = PERF_COLOR_BLUE;
int i;
printf(".");
color_fprintf(stdout, color, " %08x: ", pos);
for (i = 0; i < HISI_PTT_FIELD_LENTH; i++)
color_fprintf(stdout, color, "%02x ", buf[pos + i]);
for (i = 0; i < HISI_PTT_MAX_SPACE_LEN; i++)
color_fprintf(stdout, color, " ");
color_fprintf(stdout, color, " %s\n", desc);
}
static int hisi_ptt_8dw_kpt_desc(const unsigned char *buf, int pos)
{
int i;
for (i = 0; i < HISI_PTT_8DW_TYPE_MAX; i++) {
/* Do not show 8DW check field and reserved fields */
if (i == HISI_PTT_8DW_CHK_AND_RSV0 || i == HISI_PTT_8DW_RSV1) {
pos += HISI_PTT_FIELD_LENTH;
continue;
}
hisi_ptt_print_pkt(buf, pos, hisi_ptt_8dw_pkt_field_name[i]);
pos += HISI_PTT_FIELD_LENTH;
}
return hisi_ptt_pkt_size[HISI_PTT_8DW_PKT];
}
static void hisi_ptt_4dw_print_dw0(const unsigned char *buf, int pos)
{
const char *color = PERF_COLOR_BLUE;
union hisi_ptt_4dw dw0;
int i;
dw0.value = *(uint32_t *)(buf + pos);
printf(".");
color_fprintf(stdout, color, " %08x: ", pos);
for (i = 0; i < HISI_PTT_FIELD_LENTH; i++)
color_fprintf(stdout, color, "%02x ", buf[pos + i]);
for (i = 0; i < HISI_PTT_MAX_SPACE_LEN; i++)
color_fprintf(stdout, color, " ");
color_fprintf(stdout, color,
" %s %x %s %x %s %x %s %x %s %x %s %x %s %x %s %x\n",
"Format", dw0.format, "Type", dw0.type, "T9", dw0.t9,
"T8", dw0.t8, "TH", dw0.th, "SO", dw0.so, "Length",
dw0.len, "Time", dw0.time);
}
static int hisi_ptt_4dw_kpt_desc(const unsigned char *buf, int pos)
{
int i;
hisi_ptt_4dw_print_dw0(buf, pos);
pos += HISI_PTT_FIELD_LENTH;
for (i = 0; i < HISI_PTT_4DW_TYPE_MAX; i++) {
hisi_ptt_print_pkt(buf, pos, hisi_ptt_4dw_pkt_field_name[i]);
pos += HISI_PTT_FIELD_LENTH;
}
return hisi_ptt_pkt_size[HISI_PTT_4DW_PKT];
}
int hisi_ptt_pkt_desc(const unsigned char *buf, int pos, enum hisi_ptt_pkt_type type)
{
if (type == HISI_PTT_8DW_PKT)
return hisi_ptt_8dw_kpt_desc(buf, pos);
return hisi_ptt_4dw_kpt_desc(buf, pos);
}

31
tools/perf/util/hisi-ptt-decoder/hisi-ptt-pkt-decoder.h Normal file
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@ -0,0 +1,31 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* HiSilicon PCIe Trace and Tuning (PTT) support
* Copyright (c) 2022 HiSilicon Technologies Co., Ltd.
*/
#ifndef INCLUDE__HISI_PTT_PKT_DECODER_H__
#define INCLUDE__HISI_PTT_PKT_DECODER_H__
#include <stddef.h>
#include <stdint.h>
#define HISI_PTT_8DW_CHECK_MASK GENMASK(31, 11)
#define HISI_PTT_IS_8DW_PKT GENMASK(31, 11)
#define HISI_PTT_MAX_SPACE_LEN 10
#define HISI_PTT_FIELD_LENTH 4
enum hisi_ptt_pkt_type {
HISI_PTT_4DW_PKT,
HISI_PTT_8DW_PKT,
HISI_PTT_PKT_MAX
};
static int hisi_ptt_pkt_size[] = {
[HISI_PTT_4DW_PKT] = 16,
[HISI_PTT_8DW_PKT] = 32,
};
int hisi_ptt_pkt_desc(const unsigned char *buf, int pos, enum hisi_ptt_pkt_type type);
#endif

192
tools/perf/util/hisi-ptt.c Normal file
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@ -0,0 +1,192 @@
// SPDX-License-Identifier: GPL-2.0
/*
* HiSilicon PCIe Trace and Tuning (PTT) support
* Copyright (c) 2022 HiSilicon Technologies Co., Ltd.
*/
#include <byteswap.h>
#include <endian.h>
#include <errno.h>
#include <inttypes.h>
#include <linux/bitops.h>
#include <linux/kernel.h>
#include <linux/log2.h>
#include <linux/types.h>
#include <linux/zalloc.h>
#include <stdlib.h>
#include <unistd.h>
#include "auxtrace.h"
#include "color.h"
#include "debug.h"
#include "evsel.h"
#include "hisi-ptt.h"
#include "hisi-ptt-decoder/hisi-ptt-pkt-decoder.h"
#include "machine.h"
#include "session.h"
#include "tool.h"
#include <internal/lib.h>
struct hisi_ptt {
struct auxtrace auxtrace;
u32 auxtrace_type;
struct perf_session *session;
struct machine *machine;
u32 pmu_type;
};
struct hisi_ptt_queue {
struct hisi_ptt *ptt;
struct auxtrace_buffer *buffer;
};
static enum hisi_ptt_pkt_type hisi_ptt_check_packet_type(unsigned char *buf)
{
uint32_t head = *(uint32_t *)buf;
if ((HISI_PTT_8DW_CHECK_MASK & head) == HISI_PTT_IS_8DW_PKT)
return HISI_PTT_8DW_PKT;
return HISI_PTT_4DW_PKT;
}
static void hisi_ptt_dump(struct hisi_ptt *ptt __maybe_unused,
unsigned char *buf, size_t len)
{
const char *color = PERF_COLOR_BLUE;
enum hisi_ptt_pkt_type type;
size_t pos = 0;
int pkt_len;
type = hisi_ptt_check_packet_type(buf);
len = round_down(len, hisi_ptt_pkt_size[type]);
color_fprintf(stdout, color, ". ... HISI PTT data: size %zu bytes\n",
len);
while (len > 0) {
pkt_len = hisi_ptt_pkt_desc(buf, pos, type);
if (!pkt_len)
color_fprintf(stdout, color, " Bad packet!\n");
pos += pkt_len;
len -= pkt_len;
}
}
static void hisi_ptt_dump_event(struct hisi_ptt *ptt, unsigned char *buf,
size_t len)
{
printf(".\n");
hisi_ptt_dump(ptt, buf, len);
}
static int hisi_ptt_process_event(struct perf_session *session __maybe_unused,
union perf_event *event __maybe_unused,
struct perf_sample *sample __maybe_unused,
struct perf_tool *tool __maybe_unused)
{
return 0;
}
static int hisi_ptt_process_auxtrace_event(struct perf_session *session,
union perf_event *event,
struct perf_tool *tool __maybe_unused)
{
struct hisi_ptt *ptt = container_of(session->auxtrace, struct hisi_ptt,
auxtrace);
int fd = perf_data__fd(session->data);
int size = event->auxtrace.size;
void *data = malloc(size);
off_t data_offset;
int err;
if (!data)
return -errno;
if (perf_data__is_pipe(session->data)) {
data_offset = 0;
} else {
data_offset = lseek(fd, 0, SEEK_CUR);
if (data_offset == -1)
return -errno;
}
err = readn(fd, data, size);
if (err != (ssize_t)size) {
free(data);
return -errno;
}
if (dump_trace)
hisi_ptt_dump_event(ptt, data, size);
return 0;
}
static int hisi_ptt_flush(struct perf_session *session __maybe_unused,
struct perf_tool *tool __maybe_unused)
{
return 0;
}
static void hisi_ptt_free_events(struct perf_session *session __maybe_unused)
{
}
static void hisi_ptt_free(struct perf_session *session)
{
struct hisi_ptt *ptt = container_of(session->auxtrace, struct hisi_ptt,
auxtrace);
session->auxtrace = NULL;
free(ptt);
}
static bool hisi_ptt_evsel_is_auxtrace(struct perf_session *session,
struct evsel *evsel)
{
struct hisi_ptt *ptt = container_of(session->auxtrace, struct hisi_ptt, auxtrace);
return evsel->core.attr.type == ptt->pmu_type;
}
static void hisi_ptt_print_info(__u64 type)
{
if (!dump_trace)
return;
fprintf(stdout, " PMU Type %" PRId64 "\n", (s64) type);
}
int hisi_ptt_process_auxtrace_info(union perf_event *event,
struct perf_session *session)
{
struct perf_record_auxtrace_info *auxtrace_info = &event->auxtrace_info;
struct hisi_ptt *ptt;
if (auxtrace_info->header.size < HISI_PTT_AUXTRACE_PRIV_SIZE +
sizeof(struct perf_record_auxtrace_info))
return -EINVAL;
ptt = zalloc(sizeof(*ptt));
if (!ptt)
return -ENOMEM;
ptt->session = session;
ptt->machine = &session->machines.host; /* No kvm support */
ptt->auxtrace_type = auxtrace_info->type;
ptt->pmu_type = auxtrace_info->priv[0];
ptt->auxtrace.process_event = hisi_ptt_process_event;
ptt->auxtrace.process_auxtrace_event = hisi_ptt_process_auxtrace_event;
ptt->auxtrace.flush_events = hisi_ptt_flush;
ptt->auxtrace.free_events = hisi_ptt_free_events;
ptt->auxtrace.free = hisi_ptt_free;
ptt->auxtrace.evsel_is_auxtrace = hisi_ptt_evsel_is_auxtrace;
session->auxtrace = &ptt->auxtrace;
hisi_ptt_print_info(auxtrace_info->priv[0]);
return 0;
}

3
tools/perf/util/hisi-ptt.h
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@ -13,4 +13,7 @@
struct auxtrace_record *hisi_ptt_recording_init(int *err,
struct perf_pmu *hisi_ptt_pmu);
int hisi_ptt_process_auxtrace_info(union perf_event *event,
struct perf_session *session);
#endif