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perf tools: Add decoder mechanic to support dumping trace data

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This patch adds the required interface to the openCSD library to support
dumping CoreSight trace packet using the "report --dump" command.  The
information conveyed is related to the type of packets gathered by a
trace session rather than full decoding.

Co-authored-by: Tor Jeremiassen <tor@ti.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Kim Phillips <kim.phillips@arm.com>
Cc: Mike Leach <mike.leach@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/1516211539-5166-5-git-send-email-mathieu.poirier@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Mathieu Poirier 2018-01-17 10:52:13 -07:00 committed by Arnaldo Carvalho de Melo
parent cd8bfd8c97
commit 68ffe39028
5 changed files with 536 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
tools/perf/util/Build
View file

@ -91,6 +91,7 @@ libperf-$(CONFIG_AUXTRACE) += arm-spe-pkt-decoder.o
ifdef CONFIG_LIBOPENCSD
libperf-$(CONFIG_AUXTRACE) += cs-etm.o
libperf-$(CONFIG_AUXTRACE) += cs-etm-decoder/
endif
libperf-y += parse-branch-options.o

1
tools/perf/util/cs-etm-decoder/Build Normal file
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@ -0,0 +1 @@
libperf-$(CONFIG_AUXTRACE) += cs-etm-decoder.o

334
tools/perf/util/cs-etm-decoder/cs-etm-decoder.c Normal file
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@ -0,0 +1,334 @@
/*
* SPDX-License-Identifier: GPL-2.0
*
* Copyright(C) 2015-2018 Linaro Limited.
*
* Author: Tor Jeremiassen <tor@ti.com>
* Author: Mathieu Poirier <mathieu.poirier@linaro.org>
*/
#include <linux/err.h>
#include <linux/list.h>
#include <stdlib.h>
#include <opencsd/c_api/opencsd_c_api.h>
#include <opencsd/etmv4/trc_pkt_types_etmv4.h>
#include <opencsd/ocsd_if_types.h>
#include "cs-etm.h"
#include "cs-etm-decoder.h"
#include "intlist.h"
#include "util.h"
#define MAX_BUFFER 1024
/* use raw logging */
#ifdef CS_DEBUG_RAW
#define CS_LOG_RAW_FRAMES
#ifdef CS_RAW_PACKED
#define CS_RAW_DEBUG_FLAGS (OCSD_DFRMTR_UNPACKED_RAW_OUT | \
OCSD_DFRMTR_PACKED_RAW_OUT)
#else
#define CS_RAW_DEBUG_FLAGS (OCSD_DFRMTR_UNPACKED_RAW_OUT)
#endif
#endif
struct cs_etm_decoder {
void *data;
void (*packet_printer)(const char *msg);
bool trace_on;
dcd_tree_handle_t dcd_tree;
cs_etm_mem_cb_type mem_access;
ocsd_datapath_resp_t prev_return;
u32 packet_count;
u32 head;
u32 tail;
struct cs_etm_packet packet_buffer[MAX_BUFFER];
};
static void cs_etm_decoder__gen_etmv4_config(struct cs_etm_trace_params *params,
ocsd_etmv4_cfg *config)
{
config->reg_configr = params->etmv4.reg_configr;
config->reg_traceidr = params->etmv4.reg_traceidr;
config->reg_idr0 = params->etmv4.reg_idr0;
config->reg_idr1 = params->etmv4.reg_idr1;
config->reg_idr2 = params->etmv4.reg_idr2;
config->reg_idr8 = params->etmv4.reg_idr8;
config->reg_idr9 = 0;
config->reg_idr10 = 0;
config->reg_idr11 = 0;
config->reg_idr12 = 0;
config->reg_idr13 = 0;
config->arch_ver = ARCH_V8;
config->core_prof = profile_CortexA;
}
static void cs_etm_decoder__print_str_cb(const void *p_context,
const char *msg,
const int str_len)
{
if (p_context && str_len)
((struct cs_etm_decoder *)p_context)->packet_printer(msg);
}
static int
cs_etm_decoder__init_def_logger_printing(struct cs_etm_decoder_params *d_params,
struct cs_etm_decoder *decoder)
{
int ret = 0;
if (d_params->packet_printer == NULL)
return -1;
decoder->packet_printer = d_params->packet_printer;
/*
* Set up a library default logger to process any printers
* (packet/raw frame) we add later.
*/
ret = ocsd_def_errlog_init(OCSD_ERR_SEV_ERROR, 1);
if (ret != 0)
return -1;
/* no stdout / err / file output */
ret = ocsd_def_errlog_config_output(C_API_MSGLOGOUT_FLG_NONE, NULL);
if (ret != 0)
return -1;
/*
* Set the string CB for the default logger, passes strings to
* perf print logger.
*/
ret = ocsd_def_errlog_set_strprint_cb(decoder->dcd_tree,
(void *)decoder,
cs_etm_decoder__print_str_cb);
if (ret != 0)
ret = -1;
return 0;
}
#ifdef CS_LOG_RAW_FRAMES
static void
cs_etm_decoder__init_raw_frame_logging(struct cs_etm_decoder_params *d_params,
struct cs_etm_decoder *decoder)
{
/* Only log these during a --dump operation */
if (d_params->operation == CS_ETM_OPERATION_PRINT) {
/* set up a library default logger to process the
* raw frame printer we add later
*/
ocsd_def_errlog_init(OCSD_ERR_SEV_ERROR, 1);
/* no stdout / err / file output */
ocsd_def_errlog_config_output(C_API_MSGLOGOUT_FLG_NONE, NULL);
/* set the string CB for the default logger,
* passes strings to perf print logger.
*/
ocsd_def_errlog_set_strprint_cb(decoder->dcd_tree,
(void *)decoder,
cs_etm_decoder__print_str_cb);
/* use the built in library printer for the raw frames */
ocsd_dt_set_raw_frame_printer(decoder->dcd_tree,
CS_RAW_DEBUG_FLAGS);
}
}
#else
static void
cs_etm_decoder__init_raw_frame_logging(
struct cs_etm_decoder_params *d_params __maybe_unused,
struct cs_etm_decoder *decoder __maybe_unused)
{
}
#endif
static int cs_etm_decoder__create_packet_printer(struct cs_etm_decoder *decoder,
const char *decoder_name,
void *trace_config)
{
u8 csid;
if (ocsd_dt_create_decoder(decoder->dcd_tree, decoder_name,
OCSD_CREATE_FLG_PACKET_PROC,
trace_config, &csid))
return -1;
if (ocsd_dt_set_pkt_protocol_printer(decoder->dcd_tree, csid, 0))
return -1;
return 0;
}
static int
cs_etm_decoder__create_etm_packet_printer(struct cs_etm_trace_params *t_params,
struct cs_etm_decoder *decoder)
{
const char *decoder_name;
ocsd_etmv4_cfg trace_config_etmv4;
void *trace_config;
switch (t_params->protocol) {
case CS_ETM_PROTO_ETMV4i:
cs_etm_decoder__gen_etmv4_config(t_params, &trace_config_etmv4);
decoder_name = OCSD_BUILTIN_DCD_ETMV4I;
trace_config = &trace_config_etmv4;
break;
default:
return -1;
}
return cs_etm_decoder__create_packet_printer(decoder,
decoder_name,
trace_config);
}
static void cs_etm_decoder__clear_buffer(struct cs_etm_decoder *decoder)
{
int i;
decoder->head = 0;
decoder->tail = 0;
decoder->packet_count = 0;
for (i = 0; i < MAX_BUFFER; i++) {
decoder->packet_buffer[i].start_addr = 0xdeadbeefdeadbeefUL;
decoder->packet_buffer[i].end_addr = 0xdeadbeefdeadbeefUL;
decoder->packet_buffer[i].exc = false;
decoder->packet_buffer[i].exc_ret = false;
decoder->packet_buffer[i].cpu = INT_MIN;
}
}
static int
cs_etm_decoder__create_etm_decoder(struct cs_etm_decoder_params *d_params,
struct cs_etm_trace_params *t_params,
struct cs_etm_decoder *decoder)
{
if (d_params->operation == CS_ETM_OPERATION_PRINT)
return cs_etm_decoder__create_etm_packet_printer(t_params,
decoder);
return -1;
}
struct cs_etm_decoder *
cs_etm_decoder__new(int num_cpu, struct cs_etm_decoder_params *d_params,
struct cs_etm_trace_params t_params[])
{
struct cs_etm_decoder *decoder;
ocsd_dcd_tree_src_t format;
u32 flags;
int i, ret;
if ((!t_params) || (!d_params))
return NULL;
decoder = zalloc(sizeof(*decoder));
if (!decoder)
return NULL;
decoder->data = d_params->data;
decoder->prev_return = OCSD_RESP_CONT;
cs_etm_decoder__clear_buffer(decoder);
format = (d_params->formatted ? OCSD_TRC_SRC_FRAME_FORMATTED :
OCSD_TRC_SRC_SINGLE);
flags = 0;
flags |= (d_params->fsyncs ? OCSD_DFRMTR_HAS_FSYNCS : 0);
flags |= (d_params->hsyncs ? OCSD_DFRMTR_HAS_HSYNCS : 0);
flags |= (d_params->frame_aligned ? OCSD_DFRMTR_FRAME_MEM_ALIGN : 0);
/*
* Drivers may add barrier frames when used with perf, set up to
* handle this. Barriers const of FSYNC packet repeated 4 times.
*/
flags |= OCSD_DFRMTR_RESET_ON_4X_FSYNC;
/* Create decode tree for the data source */
decoder->dcd_tree = ocsd_create_dcd_tree(format, flags);
if (decoder->dcd_tree == 0)
goto err_free_decoder;
/* init library print logging support */
ret = cs_etm_decoder__init_def_logger_printing(d_params, decoder);
if (ret != 0)
goto err_free_decoder_tree;
/* init raw frame logging if required */
cs_etm_decoder__init_raw_frame_logging(d_params, decoder);
for (i = 0; i < num_cpu; i++) {
ret = cs_etm_decoder__create_etm_decoder(d_params,
&t_params[i],
decoder);
if (ret != 0)
goto err_free_decoder_tree;
}
return decoder;
err_free_decoder_tree:
ocsd_destroy_dcd_tree(decoder->dcd_tree);
err_free_decoder:
free(decoder);
return NULL;
}
int cs_etm_decoder__process_data_block(struct cs_etm_decoder *decoder,
u64 indx, const u8 *buf,
size_t len, size_t *consumed)
{
int ret = 0;
ocsd_datapath_resp_t cur = OCSD_RESP_CONT;
ocsd_datapath_resp_t prev_return = decoder->prev_return;
size_t processed = 0;
u32 count;
while (processed < len) {
if (OCSD_DATA_RESP_IS_WAIT(prev_return)) {
cur = ocsd_dt_process_data(decoder->dcd_tree,
OCSD_OP_FLUSH,
0,
0,
NULL,
NULL);
} else if (OCSD_DATA_RESP_IS_CONT(prev_return)) {
cur = ocsd_dt_process_data(decoder->dcd_tree,
OCSD_OP_DATA,
indx + processed,
len - processed,
&buf[processed],
&count);
processed += count;
} else {
ret = -EINVAL;
break;
}
/*
* Return to the input code if the packet buffer is full.
* Flushing will get done once the packet buffer has been
* processed.
*/
if (OCSD_DATA_RESP_IS_WAIT(cur))
break;
prev_return = cur;
}
decoder->prev_return = cur;
*consumed = processed;
return ret;
}
void cs_etm_decoder__free(struct cs_etm_decoder *decoder)
{
if (!decoder)
return;
ocsd_destroy_dcd_tree(decoder->dcd_tree);
decoder->dcd_tree = NULL;
free(decoder);
}

96
tools/perf/util/cs-etm-decoder/cs-etm-decoder.h Normal file
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@ -0,0 +1,96 @@
/*
* SPDX-License-Identifier: GPL-2.0
*
* Copyright(C) 2015-2018 Linaro Limited.
*
* Author: Tor Jeremiassen <tor@ti.com>
* Author: Mathieu Poirier <mathieu.poirier@linaro.org>
*/
#ifndef INCLUDE__CS_ETM_DECODER_H__
#define INCLUDE__CS_ETM_DECODER_H__
#include <linux/types.h>
#include <stdio.h>
struct cs_etm_decoder;
struct cs_etm_buffer {
const unsigned char *buf;
size_t len;
u64 offset;
u64 ref_timestamp;
};
enum cs_etm_sample_type {
CS_ETM_RANGE = 1 << 0,
};
struct cs_etm_packet {
enum cs_etm_sample_type sample_type;
u64 start_addr;
u64 end_addr;
u8 exc;
u8 exc_ret;
int cpu;
};
struct cs_etm_queue;
typedef u32 (*cs_etm_mem_cb_type)(struct cs_etm_queue *, u64,
size_t, u8 *);
struct cs_etmv4_trace_params {
u32 reg_idr0;
u32 reg_idr1;
u32 reg_idr2;
u32 reg_idr8;
u32 reg_configr;
u32 reg_traceidr;
};
struct cs_etm_trace_params {
int protocol;
union {
struct cs_etmv4_trace_params etmv4;
};
};
struct cs_etm_decoder_params {
int operation;
void (*packet_printer)(const char *msg);
cs_etm_mem_cb_type mem_acc_cb;
u8 formatted;
u8 fsyncs;
u8 hsyncs;
u8 frame_aligned;
void *data;
};
/*
* The following enums are indexed starting with 1 to align with the
* open source coresight trace decoder library.
*/
enum {
CS_ETM_PROTO_ETMV3 = 1,
CS_ETM_PROTO_ETMV4i,
CS_ETM_PROTO_ETMV4d,
};
enum {
CS_ETM_OPERATION_PRINT = 1,
CS_ETM_OPERATION_DECODE,
};
int cs_etm_decoder__process_data_block(struct cs_etm_decoder *decoder,
u64 indx, const u8 *buf,
size_t len, size_t *consumed);
struct cs_etm_decoder *
cs_etm_decoder__new(int num_cpu,
struct cs_etm_decoder_params *d_params,
struct cs_etm_trace_params t_params[]);
void cs_etm_decoder__free(struct cs_etm_decoder *decoder);
#endif /* INCLUDE__CS_ETM_DECODER_H__ */

108
tools/perf/util/cs-etm.c
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@ -18,6 +18,7 @@
#include "auxtrace.h"
#include "color.h"
#include "cs-etm.h"
#include "cs-etm-decoder/cs-etm-decoder.h"
#include "debug.h"
#include "evlist.h"
#include "intlist.h"
@ -69,6 +70,78 @@ struct cs_etm_queue {
u64 offset;
};
static void cs_etm__packet_dump(const char *pkt_string)
{
const char *color = PERF_COLOR_BLUE;
int len = strlen(pkt_string);
if (len && (pkt_string[len-1] == '\n'))
color_fprintf(stdout, color, " %s", pkt_string);
else
color_fprintf(stdout, color, " %s\n", pkt_string);
fflush(stdout);
}
static void cs_etm__dump_event(struct cs_etm_auxtrace *etm,
struct auxtrace_buffer *buffer)
{
int i, ret;
const char *color = PERF_COLOR_BLUE;
struct cs_etm_decoder_params d_params;
struct cs_etm_trace_params *t_params;
struct cs_etm_decoder *decoder;
size_t buffer_used = 0;
fprintf(stdout, "\n");
color_fprintf(stdout, color,
". ... CoreSight ETM Trace data: size %zu bytes\n",
buffer->size);
/* Use metadata to fill in trace parameters for trace decoder */
t_params = zalloc(sizeof(*t_params) * etm->num_cpu);
for (i = 0; i < etm->num_cpu; i++) {
t_params[i].protocol = CS_ETM_PROTO_ETMV4i;
t_params[i].etmv4.reg_idr0 = etm->metadata[i][CS_ETMV4_TRCIDR0];
t_params[i].etmv4.reg_idr1 = etm->metadata[i][CS_ETMV4_TRCIDR1];
t_params[i].etmv4.reg_idr2 = etm->metadata[i][CS_ETMV4_TRCIDR2];
t_params[i].etmv4.reg_idr8 = etm->metadata[i][CS_ETMV4_TRCIDR8];
t_params[i].etmv4.reg_configr =
etm->metadata[i][CS_ETMV4_TRCCONFIGR];
t_params[i].etmv4.reg_traceidr =
etm->metadata[i][CS_ETMV4_TRCTRACEIDR];
}
/* Set decoder parameters to simply print the trace packets */
d_params.packet_printer = cs_etm__packet_dump;
d_params.operation = CS_ETM_OPERATION_PRINT;
d_params.formatted = true;
d_params.fsyncs = false;
d_params.hsyncs = false;
d_params.frame_aligned = true;
decoder = cs_etm_decoder__new(etm->num_cpu, &d_params, t_params);
zfree(&t_params);
if (!decoder)
return;
do {
size_t consumed;
ret = cs_etm_decoder__process_data_block(
decoder, buffer->offset,
&((u8 *)buffer->data)[buffer_used],
buffer->size - buffer_used, &consumed);
if (ret)
break;
buffer_used += consumed;
} while (buffer_used < buffer->size);
cs_etm_decoder__free(decoder);
}
static int cs_etm__flush_events(struct perf_session *session,
struct perf_tool *tool)
{
@ -137,11 +210,38 @@ static int cs_etm__process_event(struct perf_session *session,
static int cs_etm__process_auxtrace_event(struct perf_session *session,
union perf_event *event,
struct perf_tool *tool)
struct perf_tool *tool __maybe_unused)
{
(void) session;
(void) event;
(void) tool;
struct cs_etm_auxtrace *etm = container_of(session->auxtrace,
struct cs_etm_auxtrace,
auxtrace);
if (!etm->data_queued) {
struct auxtrace_buffer *buffer;
off_t data_offset;
int fd = perf_data__fd(session->data);
bool is_pipe = perf_data__is_pipe(session->data);
int err;
if (is_pipe)
data_offset = 0;
else {
data_offset = lseek(fd, 0, SEEK_CUR);
if (data_offset == -1)
return -errno;
}
err = auxtrace_queues__add_event(&etm->queues, session,
event, data_offset, &buffer);
if (err)
return err;
if (dump_trace)
if (auxtrace_buffer__get_data(buffer, fd)) {
cs_etm__dump_event(etm, buffer);
auxtrace_buffer__put_data(buffer);
}
}
return 0;
}