From 440a23b34c06104bd92b876b40efa45c2d7a0e27 Mon Sep 17 00:00:00 2001 From: Mathieu Poirier Date: Wed, 17 Jan 2018 10:52:11 -0700 Subject: [PATCH] perf tools: Add initial entry point for decoder CoreSight traces This patch adds the entry point for CoreSight trace decoding, serving as a jumping board for furhter expansions. Co-authored-by: Tor Jeremiassen Signed-off-by: Mathieu Poirier Acked-by: Jiri Olsa Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Kim Phillips Cc: Mike Leach Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Suzuki Poulouse Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1516211539-5166-3-git-send-email-mathieu.poirier@linaro.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/Build | 5 + tools/perf/util/auxtrace.c | 2 + tools/perf/util/cs-etm.c | 213 +++++++++++++++++++++++++++++++++++++ tools/perf/util/cs-etm.h | 15 +++ 4 files changed, 235 insertions(+) create mode 100644 tools/perf/util/cs-etm.c diff --git a/tools/perf/util/Build b/tools/perf/util/Build index 4eef0c243306..c054ff802efb 100644 --- a/tools/perf/util/Build +++ b/tools/perf/util/Build @@ -88,6 +88,11 @@ libperf-$(CONFIG_AUXTRACE) += intel-pt.o libperf-$(CONFIG_AUXTRACE) += intel-bts.o libperf-$(CONFIG_AUXTRACE) += arm-spe.o libperf-$(CONFIG_AUXTRACE) += arm-spe-pkt-decoder.o + +ifdef CONFIG_LIBOPENCSD +libperf-$(CONFIG_AUXTRACE) += cs-etm.o +endif + libperf-y += parse-branch-options.o libperf-y += dump-insn.o libperf-y += parse-regs-options.o diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c index 3bba9947ab7f..9faf3b5367db 100644 --- a/tools/perf/util/auxtrace.c +++ b/tools/perf/util/auxtrace.c @@ -52,6 +52,7 @@ #include "debug.h" #include +#include "cs-etm.h" #include "intel-pt.h" #include "intel-bts.h" #include "arm-spe.h" @@ -914,6 +915,7 @@ int perf_event__process_auxtrace_info(struct perf_tool *tool __maybe_unused, case PERF_AUXTRACE_ARM_SPE: return arm_spe_process_auxtrace_info(event, session); case PERF_AUXTRACE_CS_ETM: + return cs_etm__process_auxtrace_info(event, session); case PERF_AUXTRACE_UNKNOWN: default: return -EINVAL; diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c new file mode 100644 index 000000000000..f47797101857 --- /dev/null +++ b/tools/perf/util/cs-etm.c @@ -0,0 +1,213 @@ +/* + * SPDX-License-Identifier: GPL-2.0 + * + * Copyright(C) 2015-2018 Linaro Limited. + * + * Author: Tor Jeremiassen + * Author: Mathieu Poirier + */ + +#include +#include +#include +#include +#include + +#include + +#include "auxtrace.h" +#include "color.h" +#include "cs-etm.h" +#include "debug.h" +#include "evlist.h" +#include "intlist.h" +#include "machine.h" +#include "map.h" +#include "perf.h" +#include "thread.h" +#include "thread_map.h" +#include "thread-stack.h" +#include "util.h" + +#define MAX_TIMESTAMP (~0ULL) + +struct cs_etm_auxtrace { + struct auxtrace auxtrace; + struct auxtrace_queues queues; + struct auxtrace_heap heap; + struct itrace_synth_opts synth_opts; + struct perf_session *session; + struct machine *machine; + struct thread *unknown_thread; + + u8 timeless_decoding; + u8 snapshot_mode; + u8 data_queued; + u8 sample_branches; + + int num_cpu; + u32 auxtrace_type; + u64 branches_sample_type; + u64 branches_id; + u64 **metadata; + u64 kernel_start; + unsigned int pmu_type; +}; + +struct cs_etm_queue { + struct cs_etm_auxtrace *etm; + struct thread *thread; + struct cs_etm_decoder *decoder; + struct auxtrace_buffer *buffer; + const struct cs_etm_state *state; + union perf_event *event_buf; + unsigned int queue_nr; + pid_t pid, tid; + int cpu; + u64 time; + u64 timestamp; + u64 offset; +}; + +static int cs_etm__flush_events(struct perf_session *session, + struct perf_tool *tool) +{ + (void) session; + (void) tool; + return 0; +} + +static void cs_etm__free_queue(void *priv) +{ + struct cs_etm_queue *etmq = priv; + + free(etmq); +} + +static void cs_etm__free_events(struct perf_session *session) +{ + unsigned int i; + struct cs_etm_auxtrace *aux = container_of(session->auxtrace, + struct cs_etm_auxtrace, + auxtrace); + struct auxtrace_queues *queues = &aux->queues; + + for (i = 0; i < queues->nr_queues; i++) { + cs_etm__free_queue(queues->queue_array[i].priv); + queues->queue_array[i].priv = NULL; + } + + auxtrace_queues__free(queues); +} + +static void cs_etm__free(struct perf_session *session) +{ + struct cs_etm_auxtrace *aux = container_of(session->auxtrace, + struct cs_etm_auxtrace, + auxtrace); + cs_etm__free_events(session); + session->auxtrace = NULL; + + zfree(&aux); +} + +static int cs_etm__process_event(struct perf_session *session, + union perf_event *event, + struct perf_sample *sample, + struct perf_tool *tool) +{ + (void) session; + (void) event; + (void) sample; + (void) tool; + return 0; +} + +static int cs_etm__process_auxtrace_event(struct perf_session *session, + union perf_event *event, + struct perf_tool *tool) +{ + (void) session; + (void) event; + (void) tool; + return 0; +} + +static bool cs_etm__is_timeless_decoding(struct cs_etm_auxtrace *etm) +{ + struct perf_evsel *evsel; + struct perf_evlist *evlist = etm->session->evlist; + bool timeless_decoding = true; + + /* + * Circle through the list of event and complain if we find one + * with the time bit set. + */ + evlist__for_each_entry(evlist, evsel) { + if ((evsel->attr.sample_type & PERF_SAMPLE_TIME)) + timeless_decoding = false; + } + + return timeless_decoding; +} + +int cs_etm__process_auxtrace_info(union perf_event *event, + struct perf_session *session) +{ + struct auxtrace_info_event *auxtrace_info = &event->auxtrace_info; + struct cs_etm_auxtrace *etm = NULL; + int event_header_size = sizeof(struct perf_event_header); + int info_header_size; + int total_size = auxtrace_info->header.size; + int err = 0; + + /* + * sizeof(auxtrace_info_event::type) + + * sizeof(auxtrace_info_event::reserved) == 8 + */ + info_header_size = 8; + + if (total_size < (event_header_size + info_header_size)) + return -EINVAL; + + etm = zalloc(sizeof(*etm)); + + if (!etm) + err = -ENOMEM; + + err = auxtrace_queues__init(&etm->queues); + if (err) + goto err_free_etm; + + etm->session = session; + etm->machine = &session->machines.host; + + etm->auxtrace_type = auxtrace_info->type; + etm->timeless_decoding = cs_etm__is_timeless_decoding(etm); + + etm->auxtrace.process_event = cs_etm__process_event; + etm->auxtrace.process_auxtrace_event = cs_etm__process_auxtrace_event; + etm->auxtrace.flush_events = cs_etm__flush_events; + etm->auxtrace.free_events = cs_etm__free_events; + etm->auxtrace.free = cs_etm__free; + session->auxtrace = &etm->auxtrace; + + if (dump_trace) + return 0; + + err = auxtrace_queues__process_index(&etm->queues, session); + if (err) + goto err_free_queues; + + etm->data_queued = etm->queues.populated; + + return 0; + +err_free_queues: + auxtrace_queues__free(&etm->queues); + session->auxtrace = NULL; +err_free_etm: + zfree(&etm); + + return -EINVAL; +} diff --git a/tools/perf/util/cs-etm.h b/tools/perf/util/cs-etm.h index 3cc6bc3263fe..5ab6a8ef1b32 100644 --- a/tools/perf/util/cs-etm.h +++ b/tools/perf/util/cs-etm.h @@ -18,6 +18,9 @@ #ifndef INCLUDE__UTIL_PERF_CS_ETM_H__ #define INCLUDE__UTIL_PERF_CS_ETM_H__ +#include "util/event.h" +#include "util/session.h" + /* Versionning header in case things need tro change in the future. That way * decoding of old snapshot is still possible. */ @@ -71,4 +74,16 @@ static const u64 __perf_cs_etmv4_magic = 0x4040404040404040ULL; #define CS_ETMV3_PRIV_SIZE (CS_ETM_PRIV_MAX * sizeof(u64)) #define CS_ETMV4_PRIV_SIZE (CS_ETMV4_PRIV_MAX * sizeof(u64)) +#ifdef HAVE_CSTRACE_SUPPORT +int cs_etm__process_auxtrace_info(union perf_event *event, + struct perf_session *session); +#else +static inline int +cs_etm__process_auxtrace_info(union perf_event *event __maybe_unused, + struct perf_session *session __maybe_unused) +{ + return -1; +} +#endif + #endif -- GitLab