perf tools: Add decoder mechanic to support dumping trace data
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
Arnaldo Carvalho de Melo
parent
cd8bfd8c97
commit
68ffe39028
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@ -91,6 +91,7 @@ libperf-$(CONFIG_AUXTRACE) += arm-spe-pkt-decoder.o
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ifdef CONFIG_LIBOPENCSD
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libperf-$(CONFIG_AUXTRACE) += cs-etm.o
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libperf-$(CONFIG_AUXTRACE) += cs-etm-decoder/
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endif
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libperf-y += parse-branch-options.o
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@ -0,0 +1 @@
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libperf-$(CONFIG_AUXTRACE) += cs-etm-decoder.o
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@ -0,0 +1,334 @@
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/*
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* SPDX-License-Identifier: GPL-2.0
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*
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* Copyright(C) 2015-2018 Linaro Limited.
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*
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* Author: Tor Jeremiassen <tor@ti.com>
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* Author: Mathieu Poirier <mathieu.poirier@linaro.org>
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*/
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#include <linux/err.h>
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#include <linux/list.h>
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#include <stdlib.h>
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#include <opencsd/c_api/opencsd_c_api.h>
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#include <opencsd/etmv4/trc_pkt_types_etmv4.h>
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#include <opencsd/ocsd_if_types.h>
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#include "cs-etm.h"
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#include "cs-etm-decoder.h"
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#include "intlist.h"
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#include "util.h"
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#define MAX_BUFFER 1024
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/* use raw logging */
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#ifdef CS_DEBUG_RAW
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#define CS_LOG_RAW_FRAMES
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#ifdef CS_RAW_PACKED
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#define CS_RAW_DEBUG_FLAGS (OCSD_DFRMTR_UNPACKED_RAW_OUT | \
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OCSD_DFRMTR_PACKED_RAW_OUT)
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#else
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#define CS_RAW_DEBUG_FLAGS (OCSD_DFRMTR_UNPACKED_RAW_OUT)
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#endif
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#endif
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struct cs_etm_decoder {
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void *data;
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void (*packet_printer)(const char *msg);
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bool trace_on;
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dcd_tree_handle_t dcd_tree;
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cs_etm_mem_cb_type mem_access;
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ocsd_datapath_resp_t prev_return;
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u32 packet_count;
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u32 head;
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u32 tail;
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struct cs_etm_packet packet_buffer[MAX_BUFFER];
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};
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static void cs_etm_decoder__gen_etmv4_config(struct cs_etm_trace_params *params,
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ocsd_etmv4_cfg *config)
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{
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config->reg_configr = params->etmv4.reg_configr;
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config->reg_traceidr = params->etmv4.reg_traceidr;
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config->reg_idr0 = params->etmv4.reg_idr0;
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config->reg_idr1 = params->etmv4.reg_idr1;
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config->reg_idr2 = params->etmv4.reg_idr2;
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config->reg_idr8 = params->etmv4.reg_idr8;
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config->reg_idr9 = 0;
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config->reg_idr10 = 0;
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config->reg_idr11 = 0;
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config->reg_idr12 = 0;
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config->reg_idr13 = 0;
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config->arch_ver = ARCH_V8;
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config->core_prof = profile_CortexA;
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}
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static void cs_etm_decoder__print_str_cb(const void *p_context,
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const char *msg,
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const int str_len)
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{
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if (p_context && str_len)
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((struct cs_etm_decoder *)p_context)->packet_printer(msg);
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}
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static int
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cs_etm_decoder__init_def_logger_printing(struct cs_etm_decoder_params *d_params,
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struct cs_etm_decoder *decoder)
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{
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int ret = 0;
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if (d_params->packet_printer == NULL)
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return -1;
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decoder->packet_printer = d_params->packet_printer;
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/*
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* Set up a library default logger to process any printers
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* (packet/raw frame) we add later.
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*/
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ret = ocsd_def_errlog_init(OCSD_ERR_SEV_ERROR, 1);
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if (ret != 0)
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return -1;
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/* no stdout / err / file output */
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ret = ocsd_def_errlog_config_output(C_API_MSGLOGOUT_FLG_NONE, NULL);
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if (ret != 0)
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return -1;
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/*
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* Set the string CB for the default logger, passes strings to
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* perf print logger.
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*/
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ret = ocsd_def_errlog_set_strprint_cb(decoder->dcd_tree,
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(void *)decoder,
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cs_etm_decoder__print_str_cb);
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if (ret != 0)
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ret = -1;
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return 0;
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}
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#ifdef CS_LOG_RAW_FRAMES
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static void
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cs_etm_decoder__init_raw_frame_logging(struct cs_etm_decoder_params *d_params,
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struct cs_etm_decoder *decoder)
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{
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/* Only log these during a --dump operation */
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if (d_params->operation == CS_ETM_OPERATION_PRINT) {
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/* set up a library default logger to process the
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* raw frame printer we add later
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*/
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ocsd_def_errlog_init(OCSD_ERR_SEV_ERROR, 1);
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/* no stdout / err / file output */
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ocsd_def_errlog_config_output(C_API_MSGLOGOUT_FLG_NONE, NULL);
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/* set the string CB for the default logger,
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* passes strings to perf print logger.
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*/
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ocsd_def_errlog_set_strprint_cb(decoder->dcd_tree,
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(void *)decoder,
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cs_etm_decoder__print_str_cb);
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/* use the built in library printer for the raw frames */
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ocsd_dt_set_raw_frame_printer(decoder->dcd_tree,
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CS_RAW_DEBUG_FLAGS);
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}
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}
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#else
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static void
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cs_etm_decoder__init_raw_frame_logging(
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struct cs_etm_decoder_params *d_params __maybe_unused,
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struct cs_etm_decoder *decoder __maybe_unused)
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{
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}
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#endif
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static int cs_etm_decoder__create_packet_printer(struct cs_etm_decoder *decoder,
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const char *decoder_name,
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void *trace_config)
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{
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u8 csid;
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if (ocsd_dt_create_decoder(decoder->dcd_tree, decoder_name,
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OCSD_CREATE_FLG_PACKET_PROC,
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trace_config, &csid))
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return -1;
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if (ocsd_dt_set_pkt_protocol_printer(decoder->dcd_tree, csid, 0))
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return -1;
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return 0;
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}
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static int
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cs_etm_decoder__create_etm_packet_printer(struct cs_etm_trace_params *t_params,
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struct cs_etm_decoder *decoder)
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{
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const char *decoder_name;
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ocsd_etmv4_cfg trace_config_etmv4;
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void *trace_config;
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switch (t_params->protocol) {
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case CS_ETM_PROTO_ETMV4i:
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cs_etm_decoder__gen_etmv4_config(t_params, &trace_config_etmv4);
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decoder_name = OCSD_BUILTIN_DCD_ETMV4I;
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trace_config = &trace_config_etmv4;
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break;
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default:
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return -1;
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}
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return cs_etm_decoder__create_packet_printer(decoder,
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decoder_name,
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trace_config);
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}
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static void cs_etm_decoder__clear_buffer(struct cs_etm_decoder *decoder)
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{
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int i;
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decoder->head = 0;
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decoder->tail = 0;
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decoder->packet_count = 0;
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for (i = 0; i < MAX_BUFFER; i++) {
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decoder->packet_buffer[i].start_addr = 0xdeadbeefdeadbeefUL;
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decoder->packet_buffer[i].end_addr = 0xdeadbeefdeadbeefUL;
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decoder->packet_buffer[i].exc = false;
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decoder->packet_buffer[i].exc_ret = false;
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decoder->packet_buffer[i].cpu = INT_MIN;
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}
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}
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static int
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cs_etm_decoder__create_etm_decoder(struct cs_etm_decoder_params *d_params,
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struct cs_etm_trace_params *t_params,
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struct cs_etm_decoder *decoder)
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{
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if (d_params->operation == CS_ETM_OPERATION_PRINT)
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return cs_etm_decoder__create_etm_packet_printer(t_params,
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decoder);
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return -1;
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}
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struct cs_etm_decoder *
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cs_etm_decoder__new(int num_cpu, struct cs_etm_decoder_params *d_params,
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struct cs_etm_trace_params t_params[])
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{
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struct cs_etm_decoder *decoder;
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ocsd_dcd_tree_src_t format;
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u32 flags;
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int i, ret;
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if ((!t_params) || (!d_params))
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return NULL;
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decoder = zalloc(sizeof(*decoder));
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if (!decoder)
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return NULL;
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decoder->data = d_params->data;
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decoder->prev_return = OCSD_RESP_CONT;
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cs_etm_decoder__clear_buffer(decoder);
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format = (d_params->formatted ? OCSD_TRC_SRC_FRAME_FORMATTED :
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OCSD_TRC_SRC_SINGLE);
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flags = 0;
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flags |= (d_params->fsyncs ? OCSD_DFRMTR_HAS_FSYNCS : 0);
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flags |= (d_params->hsyncs ? OCSD_DFRMTR_HAS_HSYNCS : 0);
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flags |= (d_params->frame_aligned ? OCSD_DFRMTR_FRAME_MEM_ALIGN : 0);
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/*
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* Drivers may add barrier frames when used with perf, set up to
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* handle this. Barriers const of FSYNC packet repeated 4 times.
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*/
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flags |= OCSD_DFRMTR_RESET_ON_4X_FSYNC;
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/* Create decode tree for the data source */
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decoder->dcd_tree = ocsd_create_dcd_tree(format, flags);
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if (decoder->dcd_tree == 0)
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goto err_free_decoder;
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/* init library print logging support */
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ret = cs_etm_decoder__init_def_logger_printing(d_params, decoder);
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if (ret != 0)
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goto err_free_decoder_tree;
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/* init raw frame logging if required */
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cs_etm_decoder__init_raw_frame_logging(d_params, decoder);
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for (i = 0; i < num_cpu; i++) {
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ret = cs_etm_decoder__create_etm_decoder(d_params,
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&t_params[i],
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decoder);
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if (ret != 0)
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goto err_free_decoder_tree;
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}
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return decoder;
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err_free_decoder_tree:
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ocsd_destroy_dcd_tree(decoder->dcd_tree);
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err_free_decoder:
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free(decoder);
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return NULL;
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}
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int cs_etm_decoder__process_data_block(struct cs_etm_decoder *decoder,
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u64 indx, const u8 *buf,
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size_t len, size_t *consumed)
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{
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int ret = 0;
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ocsd_datapath_resp_t cur = OCSD_RESP_CONT;
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ocsd_datapath_resp_t prev_return = decoder->prev_return;
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size_t processed = 0;
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u32 count;
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while (processed < len) {
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if (OCSD_DATA_RESP_IS_WAIT(prev_return)) {
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cur = ocsd_dt_process_data(decoder->dcd_tree,
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OCSD_OP_FLUSH,
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0,
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0,
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NULL,
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NULL);
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} else if (OCSD_DATA_RESP_IS_CONT(prev_return)) {
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cur = ocsd_dt_process_data(decoder->dcd_tree,
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OCSD_OP_DATA,
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indx + processed,
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len - processed,
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&buf[processed],
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&count);
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processed += count;
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} else {
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ret = -EINVAL;
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break;
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}
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/*
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* Return to the input code if the packet buffer is full.
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* Flushing will get done once the packet buffer has been
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* processed.
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*/
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if (OCSD_DATA_RESP_IS_WAIT(cur))
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break;
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prev_return = cur;
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}
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decoder->prev_return = cur;
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*consumed = processed;
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return ret;
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}
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void cs_etm_decoder__free(struct cs_etm_decoder *decoder)
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{
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if (!decoder)
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return;
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ocsd_destroy_dcd_tree(decoder->dcd_tree);
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decoder->dcd_tree = NULL;
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free(decoder);
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}
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@ -0,0 +1,96 @@
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/*
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* SPDX-License-Identifier: GPL-2.0
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*
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* Copyright(C) 2015-2018 Linaro Limited.
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*
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* Author: Tor Jeremiassen <tor@ti.com>
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* Author: Mathieu Poirier <mathieu.poirier@linaro.org>
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*/
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#ifndef INCLUDE__CS_ETM_DECODER_H__
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#define INCLUDE__CS_ETM_DECODER_H__
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#include <linux/types.h>
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#include <stdio.h>
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struct cs_etm_decoder;
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struct cs_etm_buffer {
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const unsigned char *buf;
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size_t len;
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u64 offset;
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u64 ref_timestamp;
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};
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enum cs_etm_sample_type {
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CS_ETM_RANGE = 1 << 0,
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};
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struct cs_etm_packet {
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enum cs_etm_sample_type sample_type;
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u64 start_addr;
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u64 end_addr;
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u8 exc;
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u8 exc_ret;
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int cpu;
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};
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struct cs_etm_queue;
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typedef u32 (*cs_etm_mem_cb_type)(struct cs_etm_queue *, u64,
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size_t, u8 *);
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struct cs_etmv4_trace_params {
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u32 reg_idr0;
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u32 reg_idr1;
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u32 reg_idr2;
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u32 reg_idr8;
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u32 reg_configr;
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u32 reg_traceidr;
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};
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struct cs_etm_trace_params {
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int protocol;
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union {
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struct cs_etmv4_trace_params etmv4;
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};
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};
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struct cs_etm_decoder_params {
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int operation;
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void (*packet_printer)(const char *msg);
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cs_etm_mem_cb_type mem_acc_cb;
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u8 formatted;
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u8 fsyncs;
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u8 hsyncs;
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u8 frame_aligned;
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void *data;
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};
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/*
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* The following enums are indexed starting with 1 to align with the
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* open source coresight trace decoder library.
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*/
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enum {
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CS_ETM_PROTO_ETMV3 = 1,
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CS_ETM_PROTO_ETMV4i,
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CS_ETM_PROTO_ETMV4d,
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};
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enum {
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CS_ETM_OPERATION_PRINT = 1,
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CS_ETM_OPERATION_DECODE,
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};
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int cs_etm_decoder__process_data_block(struct cs_etm_decoder *decoder,
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u64 indx, const u8 *buf,
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size_t len, size_t *consumed);
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struct cs_etm_decoder *
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cs_etm_decoder__new(int num_cpu,
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struct cs_etm_decoder_params *d_params,
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struct cs_etm_trace_params t_params[]);
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void cs_etm_decoder__free(struct cs_etm_decoder *decoder);
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#endif /* INCLUDE__CS_ETM_DECODER_H__ */
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@ -18,6 +18,7 @@
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#include "auxtrace.h"
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#include "color.h"
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#include "cs-etm.h"
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#include "cs-etm-decoder/cs-etm-decoder.h"
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#include "debug.h"
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#include "evlist.h"
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#include "intlist.h"
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@ -69,6 +70,78 @@ struct cs_etm_queue {
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u64 offset;
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};
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static void cs_etm__packet_dump(const char *pkt_string)
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{
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const char *color = PERF_COLOR_BLUE;
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int len = strlen(pkt_string);
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if (len && (pkt_string[len-1] == '\n'))
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color_fprintf(stdout, color, " %s", pkt_string);
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else
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color_fprintf(stdout, color, " %s\n", pkt_string);
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fflush(stdout);
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}
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|
||||
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;
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue