diff options
Diffstat (limited to 'tools/perf/util/cs-etm.c')
| -rw-r--r-- | tools/perf/util/cs-etm.c | 1023 |
1 files changed, 1023 insertions, 0 deletions
diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c new file mode 100644 index 000000000000..b9f0a53dfa65 --- /dev/null +++ b/tools/perf/util/cs-etm.c @@ -0,0 +1,1023 @@ +/* + * 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/bitops.h> +#include <linux/err.h> +#include <linux/kernel.h> +#include <linux/log2.h> +#include <linux/types.h> + +#include <stdlib.h> + +#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" +#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__update_queues(struct cs_etm_auxtrace *etm); +static int cs_etm__process_timeless_queues(struct cs_etm_auxtrace *etm, + pid_t tid, u64 time_); + +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) +{ + int ret; + struct cs_etm_auxtrace *etm = container_of(session->auxtrace, + struct cs_etm_auxtrace, + auxtrace); + if (dump_trace) + return 0; + + if (!tool->ordered_events) + return -EINVAL; + + if (!etm->timeless_decoding) + return -EINVAL; + + ret = cs_etm__update_queues(etm); + + if (ret < 0) + return ret; + + return cs_etm__process_timeless_queues(etm, -1, MAX_TIMESTAMP - 1); +} + +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) +{ + int i; + struct int_node *inode, *tmp; + struct cs_etm_auxtrace *aux = container_of(session->auxtrace, + struct cs_etm_auxtrace, + auxtrace); + cs_etm__free_events(session); + session->auxtrace = NULL; + + /* First remove all traceID/CPU# nodes for the RB tree */ + intlist__for_each_entry_safe(inode, tmp, traceid_list) + intlist__remove(traceid_list, inode); + /* Then the RB tree itself */ + intlist__delete(traceid_list); + + for (i = 0; i < aux->num_cpu; i++) + zfree(&aux->metadata[i]); + + zfree(&aux->metadata); + zfree(&aux); +} + +static u32 cs_etm__mem_access(struct cs_etm_queue *etmq, u64 address, + size_t size, u8 *buffer) +{ + u8 cpumode; + u64 offset; + int len; + struct thread *thread; + struct machine *machine; + struct addr_location al; + + if (!etmq) + return -1; + + machine = etmq->etm->machine; + if (address >= etmq->etm->kernel_start) + cpumode = PERF_RECORD_MISC_KERNEL; + else + cpumode = PERF_RECORD_MISC_USER; + + thread = etmq->thread; + if (!thread) { + if (cpumode != PERF_RECORD_MISC_KERNEL) + return -EINVAL; + thread = etmq->etm->unknown_thread; + } + + thread__find_addr_map(thread, cpumode, MAP__FUNCTION, address, &al); + + if (!al.map || !al.map->dso) + return 0; + + if (al.map->dso->data.status == DSO_DATA_STATUS_ERROR && + dso__data_status_seen(al.map->dso, DSO_DATA_STATUS_SEEN_ITRACE)) + return 0; + + offset = al.map->map_ip(al.map, address); + + map__load(al.map); + + len = dso__data_read_offset(al.map->dso, machine, offset, buffer, size); + + if (len <= 0) + return 0; + + return len; +} + +static struct cs_etm_queue *cs_etm__alloc_queue(struct cs_etm_auxtrace *etm, + unsigned int queue_nr) +{ + int i; + struct cs_etm_decoder_params d_params; + struct cs_etm_trace_params *t_params; + struct cs_etm_queue *etmq; + + etmq = zalloc(sizeof(*etmq)); + if (!etmq) + return NULL; + + etmq->event_buf = malloc(PERF_SAMPLE_MAX_SIZE); + if (!etmq->event_buf) + goto out_free; + + etmq->etm = etm; + etmq->queue_nr = queue_nr; + etmq->pid = -1; + etmq->tid = -1; + etmq->cpu = -1; + + /* Use metadata to fill in trace parameters for trace decoder */ + t_params = zalloc(sizeof(*t_params) * etm->num_cpu); + + if (!t_params) + goto out_free; + + 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_DECODE; + d_params.formatted = true; + d_params.fsyncs = false; + d_params.hsyncs = false; + d_params.frame_aligned = true; + d_params.data = etmq; + + etmq->decoder = cs_etm_decoder__new(etm->num_cpu, &d_params, t_params); + + zfree(&t_params); + + if (!etmq->decoder) + goto out_free; + + /* + * Register a function to handle all memory accesses required by + * the trace decoder library. + */ + if (cs_etm_decoder__add_mem_access_cb(etmq->decoder, + 0x0L, ((u64) -1L), + cs_etm__mem_access)) + goto out_free_decoder; + + etmq->offset = 0; + + return etmq; + +out_free_decoder: + cs_etm_decoder__free(etmq->decoder); +out_free: + zfree(&etmq->event_buf); + free(etmq); + + return NULL; +} + +static int cs_etm__setup_queue(struct cs_etm_auxtrace *etm, + struct auxtrace_queue *queue, + unsigned int queue_nr) +{ + struct cs_etm_queue *etmq = queue->priv; + + if (list_empty(&queue->head) || etmq) + return 0; + + etmq = cs_etm__alloc_queue(etm, queue_nr); + + if (!etmq) + return -ENOMEM; + + queue->priv = etmq; + + if (queue->cpu != -1) + etmq->cpu = queue->cpu; + + etmq->tid = queue->tid; + + return 0; +} + +static int cs_etm__setup_queues(struct cs_etm_auxtrace *etm) +{ + unsigned int i; + int ret; + + for (i = 0; i < etm->queues.nr_queues; i++) { + ret = cs_etm__setup_queue(etm, &etm->queues.queue_array[i], i); + if (ret) + return ret; + } + + return 0; +} + +static int cs_etm__update_queues(struct cs_etm_auxtrace *etm) +{ + if (etm->queues.new_data) { + etm->queues.new_data = false; + return cs_etm__setup_queues(etm); + } + + return 0; +} + +static int +cs_etm__get_trace(struct cs_etm_buffer *buff, struct cs_etm_queue *etmq) +{ + struct auxtrace_buffer *aux_buffer = etmq->buffer; + struct auxtrace_buffer *old_buffer = aux_buffer; + struct auxtrace_queue *queue; + + queue = &etmq->etm->queues.queue_array[etmq->queue_nr]; + + aux_buffer = auxtrace_buffer__next(queue, aux_buffer); + + /* If no more data, drop the previous auxtrace_buffer and return */ + if (!aux_buffer) { + if (old_buffer) + auxtrace_buffer__drop_data(old_buffer); + buff->len = 0; + return 0; + } + + etmq->buffer = aux_buffer; + + /* If the aux_buffer doesn't have data associated, try to load it */ + if (!aux_buffer->data) { + /* get the file desc associated with the perf data file */ + int fd = perf_data__fd(etmq->etm->session->data); + + aux_buffer->data = auxtrace_buffer__get_data(aux_buffer, fd); + if (!aux_buffer->data) + return -ENOMEM; + } + + /* If valid, drop the previous buffer */ + if (old_buffer) + auxtrace_buffer__drop_data(old_buffer); + + buff->offset = aux_buffer->offset; + buff->len = aux_buffer->size; + buff->buf = aux_buffer->data; + + buff->ref_timestamp = aux_buffer->reference; + + return buff->len; +} + +static void cs_etm__set_pid_tid_cpu(struct cs_etm_auxtrace *etm, + struct auxtrace_queue *queue) +{ + struct cs_etm_queue *etmq = queue->priv; + + /* CPU-wide tracing isn't supported yet */ + if (queue->tid == -1) + return; + + if ((!etmq->thread) && (etmq->tid != -1)) + etmq->thread = machine__find_thread(etm->machine, -1, + etmq->tid); + + if (etmq->thread) { + etmq->pid = etmq->thread->pid_; + if (queue->cpu == -1) + etmq->cpu = etmq->thread->cpu; + } +} + +/* + * The cs etm packet encodes an instruction range between a branch target + * and the next taken branch. Generate sample accordingly. + */ +static int cs_etm__synth_branch_sample(struct cs_etm_queue *etmq, + struct cs_etm_packet *packet) +{ + int ret = 0; + struct cs_etm_auxtrace *etm = etmq->etm; + struct perf_sample sample = {.ip = 0,}; + union perf_event *event = etmq->event_buf; + u64 start_addr = packet->start_addr; + u64 end_addr = packet->end_addr; + + event->sample.header.type = PERF_RECORD_SAMPLE; + event->sample.header.misc = PERF_RECORD_MISC_USER; + event->sample.header.size = sizeof(struct perf_event_header); + + sample.ip = start_addr; + sample.pid = etmq->pid; + sample.tid = etmq->tid; + sample.addr = end_addr; + sample.id = etmq->etm->branches_id; + sample.stream_id = etmq->etm->branches_id; + sample.period = 1; + sample.cpu = packet->cpu; + sample.flags = 0; + sample.cpumode = PERF_RECORD_MISC_USER; + + ret = perf_session__deliver_synth_event(etm->session, event, &sample); + + if (ret) + pr_err( + "CS ETM Trace: failed to deliver instruction event, error %d\n", + ret); + + return ret; +} + +struct cs_etm_synth { + struct perf_tool dummy_tool; + struct perf_session *session; +}; + +static int cs_etm__event_synth(struct perf_tool *tool, + union perf_event *event, + struct perf_sample *sample __maybe_unused, + struct machine *machine __maybe_unused) +{ + struct cs_etm_synth *cs_etm_synth = + container_of(tool, struct cs_etm_synth, dummy_tool); + + return perf_session__deliver_synth_event(cs_etm_synth->session, + event, NULL); +} + +static int cs_etm__synth_event(struct perf_session *session, + struct perf_event_attr *attr, u64 id) +{ + struct cs_etm_synth cs_etm_synth; + + memset(&cs_etm_synth, 0, sizeof(struct cs_etm_synth)); + cs_etm_synth.session = session; + + return perf_event__synthesize_attr(&cs_etm_synth.dummy_tool, attr, 1, + &id, cs_etm__event_synth); +} + +static int cs_etm__synth_events(struct cs_etm_auxtrace *etm, + struct perf_session *session) +{ + struct perf_evlist *evlist = session->evlist; + struct perf_evsel *evsel; + struct perf_event_attr attr; + bool found = false; + u64 id; + int err; + + evlist__for_each_entry(evlist, evsel) { + if (evsel->attr.type == etm->pmu_type) { + found = true; + break; + } + } + + if (!found) { + pr_debug("No selected events with CoreSight Trace data\n"); + return 0; + } + + memset(&attr, 0, sizeof(struct perf_event_attr)); + attr.size = sizeof(struct perf_event_attr); + attr.type = PERF_TYPE_HARDWARE; + attr.sample_type = evsel->attr.sample_type & PERF_SAMPLE_MASK; + attr.sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID | + PERF_SAMPLE_PERIOD; + if (etm->timeless_decoding) + attr.sample_type &= ~(u64)PERF_SAMPLE_TIME; + else + attr.sample_type |= PERF_SAMPLE_TIME; + + attr.exclude_user = evsel->attr.exclude_user; + attr.exclude_kernel = evsel->attr.exclude_kernel; + attr.exclude_hv = evsel->attr.exclude_hv; + attr.exclude_host = evsel->attr.exclude_host; + attr.exclude_guest = evsel->attr.exclude_guest; + attr.sample_id_all = evsel->attr.sample_id_all; + attr.read_format = evsel->attr.read_format; + + /* create new id val to be a fixed offset from evsel id */ + id = evsel->id[0] + 1000000000; + + if (!id) + id = 1; + + if (etm->synth_opts.branches) { + attr.config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS; + attr.sample_period = 1; + attr.sample_type |= PERF_SAMPLE_ADDR; + err = cs_etm__synth_event(session, &attr, id); + if (err) + return err; + etm->sample_branches = true; + etm->branches_sample_type = attr.sample_type; + etm->branches_id = id; + } + + return 0; +} + +static int cs_etm__sample(struct cs_etm_queue *etmq) +{ + int ret; + struct cs_etm_packet packet; + + while (1) { + ret = cs_etm_decoder__get_packet(etmq->decoder, &packet); + if (ret <= 0) + return ret; + + /* + * If the packet contains an instruction range, generate an + * instruction sequence event. + */ + if (packet.sample_type & CS_ETM_RANGE) + cs_etm__synth_branch_sample(etmq, &packet); + } + + return 0; +} + +static int cs_etm__run_decoder(struct cs_etm_queue *etmq) +{ + struct cs_etm_auxtrace *etm = etmq->etm; + struct cs_etm_buffer buffer; + size_t buffer_used, processed; + int err = 0; + + if (!etm->kernel_start) + etm->kernel_start = machine__kernel_start(etm->machine); + + /* Go through each buffer in the queue and decode them one by one */ +more: + buffer_used = 0; + memset(&buffer, 0, sizeof(buffer)); + err = cs_etm__get_trace(&buffer, etmq); + if (err <= 0) + return err; + /* + * We cannot assume consecutive blocks in the data file are contiguous, + * reset the decoder to force re-sync. + */ + err = cs_etm_decoder__reset(etmq->decoder); + if (err != 0) + return err; + + /* Run trace decoder until buffer consumed or end of trace */ + do { + processed = 0; + + err = cs_etm_decoder__process_data_block( + etmq->decoder, + etmq->offset, + &buffer.buf[buffer_used], + buffer.len - buffer_used, + &processed); + + if (err) + return err; + + etmq->offset += processed; + buffer_used += processed; + + /* + * Nothing to do with an error condition, let's hope the next + * chunk will be better. + */ + err = cs_etm__sample(etmq); + } while (buffer.len > buffer_used); + +goto more; + + return err; +} + +static int cs_etm__process_timeless_queues(struct cs_etm_auxtrace *etm, + pid_t tid, u64 time_) +{ + unsigned int i; + struct auxtrace_queues *queues = &etm->queues; + + for (i = 0; i < queues->nr_queues; i++) { + struct auxtrace_queue *queue = &etm->queues.queue_array[i]; + struct cs_etm_queue *etmq = queue->priv; + + if (etmq && ((tid == -1) || (etmq->tid == tid))) { + etmq->time = time_; + cs_etm__set_pid_tid_cpu(etm, queue); + cs_etm__run_decoder(etmq); + } + } + + return 0; +} + +static int cs_etm__process_event(struct perf_session *session, + union perf_event *event, + struct perf_sample *sample, + struct perf_tool *tool) +{ + int err = 0; + u64 timestamp; + struct cs_etm_auxtrace *etm = container_of(session->auxtrace, + struct cs_etm_auxtrace, + auxtrace); + + if (dump_trace) + return 0; + + if (!tool->ordered_events) { + pr_err("CoreSight ETM Trace requires ordered events\n"); + return -EINVAL; + } + + if (!etm->timeless_decoding) + return -EINVAL; + + if (sample->time && (sample->time != (u64) -1)) + timestamp = sample->time; + else + timestamp = 0; + + if (timestamp || etm->timeless_decoding) { + err = cs_etm__update_queues(etm); + if (err) + return err; + } + + if (event->header.type == PERF_RECORD_EXIT) + return cs_etm__process_timeless_queues(etm, + event->fork.tid, + sample->time); + + return 0; +} + +static int cs_etm__process_auxtrace_event(struct perf_session *session, + union perf_event *event, + struct perf_tool *tool __maybe_unused) +{ + 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; +} + +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; +} + +static const char * const cs_etm_global_header_fmts[] = { + [CS_HEADER_VERSION_0] = " Header version %llx\n", + [CS_PMU_TYPE_CPUS] = " PMU type/num cpus %llx\n", + [CS_ETM_SNAPSHOT] = " Snapshot %llx\n", +}; + +static const char * const cs_etm_priv_fmts[] = { + [CS_ETM_MAGIC] = " Magic number %llx\n", + [CS_ETM_CPU] = " CPU %lld\n", + [CS_ETM_ETMCR] = " ETMCR %llx\n", + [CS_ETM_ETMTRACEIDR] = " ETMTRACEIDR %llx\n", + [CS_ETM_ETMCCER] = " ETMCCER %llx\n", + [CS_ETM_ETMIDR] = " ETMIDR %llx\n", +}; + +static const char * const cs_etmv4_priv_fmts[] = { + [CS_ETM_MAGIC] = " Magic number %llx\n", + [CS_ETM_CPU] = " CPU %lld\n", + [CS_ETMV4_TRCCONFIGR] = " TRCCONFIGR %llx\n", + [CS_ETMV4_TRCTRACEIDR] = " TRCTRACEIDR %llx\n", + [CS_ETMV4_TRCIDR0] = " TRCIDR0 %llx\n", + [CS_ETMV4_TRCIDR1] = " TRCIDR1 %llx\n", + [CS_ETMV4_TRCIDR2] = " TRCIDR2 %llx\n", + [CS_ETMV4_TRCIDR8] = " TRCIDR8 %llx\n", + [CS_ETMV4_TRCAUTHSTATUS] = " TRCAUTHSTATUS %llx\n", +}; + +static void cs_etm__print_auxtrace_info(u64 *val, int num) +{ + int i, j, cpu = 0; + + for (i = 0; i < CS_HEADER_VERSION_0_MAX; i++) + fprintf(stdout, cs_etm_global_header_fmts[i], val[i]); + + for (i = CS_HEADER_VERSION_0_MAX; cpu < num; cpu++) { + if (val[i] == __perf_cs_etmv3_magic) + for (j = 0; j < CS_ETM_PRIV_MAX; j++, i++) + fprintf(stdout, cs_etm_priv_fmts[j], val[i]); + else if (val[i] == __perf_cs_etmv4_magic) + for (j = 0; j < CS_ETMV4_PRIV_MAX; j++, i++) + fprintf(stdout, cs_etmv4_priv_fmts[j], val[i]); + else + /* failure.. return */ + return; + } +} + +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; + struct int_node *inode; + unsigned int pmu_type; + int event_header_size = sizeof(struct perf_event_header); + int info_header_size; + int total_size = auxtrace_info->header.size; + int priv_size = 0; + int num_cpu; + int err = 0, idx = -1; + int i, j, k; + u64 *ptr, *hdr = NULL; + u64 **metadata = NULL; + + /* + * 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; + + priv_size = total_size - event_header_size - info_header_size; + + /* First the global part */ + ptr = (u64 *) auxtrace_info->priv; + + /* Look for version '0' of the header */ + if (ptr[0] != 0) + return -EINVAL; + + hdr = zalloc(sizeof(*hdr) * CS_HEADER_VERSION_0_MAX); + if (!hdr) + return -ENOMEM; + + /* Extract header information - see cs-etm.h for format */ + for (i = 0; i < CS_HEADER_VERSION_0_MAX; i++) + hdr[i] = ptr[i]; + num_cpu = hdr[CS_PMU_TYPE_CPUS] & 0xffffffff; + pmu_type = (unsigned int) ((hdr[CS_PMU_TYPE_CPUS] >> 32) & + 0xffffffff); + + /* + * Create an RB tree for traceID-CPU# tuple. Since the conversion has + * to be made for each packet that gets decoded, optimizing access in + * anything other than a sequential array is worth doing. + */ + traceid_list = intlist__new(NULL); + if (!traceid_list) { + err = -ENOMEM; + goto err_free_hdr; + } + + metadata = zalloc(sizeof(*metadata) * num_cpu); + if (!metadata) { + err = -ENOMEM; + goto err_free_traceid_list; + } + + /* + * The metadata is stored in the auxtrace_info section and encodes + * the configuration of the ARM embedded trace macrocell which is + * required by the trace decoder to properly decode the trace due + * to its highly compressed nature. + */ + for (j = 0; j < num_cpu; j++) { + if (ptr[i] == __perf_cs_etmv3_magic) { + metadata[j] = zalloc(sizeof(*metadata[j]) * + CS_ETM_PRIV_MAX); + if (!metadata[j]) { + err = -ENOMEM; + goto err_free_metadata; + } + for (k = 0; k < CS_ETM_PRIV_MAX; k++) + metadata[j][k] = ptr[i + k]; + + /* The traceID is our handle */ + idx = metadata[j][CS_ETM_ETMTRACEIDR]; + i += CS_ETM_PRIV_MAX; + } else if (ptr[i] == __perf_cs_etmv4_magic) { + metadata[j] = zalloc(sizeof(*metadata[j]) * + CS_ETMV4_PRIV_MAX); + if (!metadata[j]) { + err = -ENOMEM; + goto err_free_metadata; + } + for (k = 0; k < CS_ETMV4_PRIV_MAX; k++) + metadata[j][k] = ptr[i + k]; + + /* The traceID is our handle */ + idx = metadata[j][CS_ETMV4_TRCTRACEIDR]; + i += CS_ETMV4_PRIV_MAX; + } + + /* Get an RB node for this CPU */ + inode = intlist__findnew(traceid_list, idx); + + /* Something went wrong, no need to continue */ + if (!inode) { + err = PTR_ERR(inode); + goto err_free_metadata; + } + + /* + * The node for that CPU should not be taken. + * Back out if that's the case. + */ + if (inode->priv) { + err = -EINVAL; + goto err_free_metadata; + } + /* All good, associate the traceID with the CPU# */ + inode->priv = &metadata[j][CS_ETM_CPU]; + } + + /* + * Each of CS_HEADER_VERSION_0_MAX, CS_ETM_PRIV_MAX and + * CS_ETMV4_PRIV_MAX mark how many double words are in the + * global metadata, and each cpu's metadata respectively. + * The following tests if the correct number of double words was + * present in the auxtrace info section. + */ + if (i * 8 != priv_size) { + err = -EINVAL; + goto err_free_metadata; + } + + etm = zalloc(sizeof(*etm)); + + if (!etm) { + err = -ENOMEM; + goto err_free_metadata; + } + + err = auxtrace_queues__init(&etm->queues); + if (err) + goto err_free_etm; + + etm->session = session; + etm->machine = &session->machines.host; + + etm->num_cpu = num_cpu; + etm->pmu_type = pmu_type; + etm->snapshot_mode = (hdr[CS_ETM_SNAPSHOT] != 0); + etm->metadata = metadata; + 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) { + cs_etm__print_auxtrace_info(auxtrace_info->priv, num_cpu); + return 0; + } + + if (session->itrace_synth_opts && session->itrace_synth_opts->set) { + etm->synth_opts = *session->itrace_synth_opts; + } else { + itrace_synth_opts__set_default(&etm->synth_opts); + etm->synth_opts.callchain = false; + } + + err = cs_etm__synth_events(etm, session); + if (err) + goto err_free_queues; + + 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); +err_free_metadata: + /* No need to check @metadata[j], free(NULL) is supported */ + for (j = 0; j < num_cpu; j++) + free(metadata[j]); + zfree(&metadata); +err_free_traceid_list: + intlist__delete(traceid_list); +err_free_hdr: + zfree(&hdr); + + return -EINVAL; +} |