v4.19.13 snapshot.
diff --git a/tools/perf/util/intel-bts.c b/tools/perf/util/intel-bts.c
new file mode 100644
index 0000000..7127bc9
--- /dev/null
+++ b/tools/perf/util/intel-bts.c
@@ -0,0 +1,952 @@
+/*
+ * intel-bts.c: Intel Processor Trace support
+ * Copyright (c) 2013-2015, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ */
+
+#include <endian.h>
+#include <errno.h>
+#include <byteswap.h>
+#include <inttypes.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/bitops.h>
+#include <linux/log2.h>
+
+#include "cpumap.h"
+#include "color.h"
+#include "evsel.h"
+#include "evlist.h"
+#include "machine.h"
+#include "session.h"
+#include "util.h"
+#include "thread.h"
+#include "thread-stack.h"
+#include "debug.h"
+#include "tsc.h"
+#include "auxtrace.h"
+#include "intel-pt-decoder/intel-pt-insn-decoder.h"
+#include "intel-bts.h"
+
+#define MAX_TIMESTAMP (~0ULL)
+
+#define INTEL_BTS_ERR_NOINSN 5
+#define INTEL_BTS_ERR_LOST 9
+
+#if __BYTE_ORDER == __BIG_ENDIAN
+#define le64_to_cpu bswap_64
+#else
+#define le64_to_cpu
+#endif
+
+struct intel_bts {
+ struct auxtrace auxtrace;
+ struct auxtrace_queues queues;
+ struct auxtrace_heap heap;
+ u32 auxtrace_type;
+ struct perf_session *session;
+ struct machine *machine;
+ bool sampling_mode;
+ bool snapshot_mode;
+ bool data_queued;
+ u32 pmu_type;
+ struct perf_tsc_conversion tc;
+ bool cap_user_time_zero;
+ struct itrace_synth_opts synth_opts;
+ bool sample_branches;
+ u32 branches_filter;
+ u64 branches_sample_type;
+ u64 branches_id;
+ size_t branches_event_size;
+ unsigned long num_events;
+};
+
+struct intel_bts_queue {
+ struct intel_bts *bts;
+ unsigned int queue_nr;
+ struct auxtrace_buffer *buffer;
+ bool on_heap;
+ bool done;
+ pid_t pid;
+ pid_t tid;
+ int cpu;
+ u64 time;
+ struct intel_pt_insn intel_pt_insn;
+ u32 sample_flags;
+};
+
+struct branch {
+ u64 from;
+ u64 to;
+ u64 misc;
+};
+
+static void intel_bts_dump(struct intel_bts *bts __maybe_unused,
+ unsigned char *buf, size_t len)
+{
+ struct branch *branch;
+ size_t i, pos = 0, br_sz = sizeof(struct branch), sz;
+ const char *color = PERF_COLOR_BLUE;
+
+ color_fprintf(stdout, color,
+ ". ... Intel BTS data: size %zu bytes\n",
+ len);
+
+ while (len) {
+ if (len >= br_sz)
+ sz = br_sz;
+ else
+ sz = len;
+ printf(".");
+ color_fprintf(stdout, color, " %08x: ", pos);
+ for (i = 0; i < sz; i++)
+ color_fprintf(stdout, color, " %02x", buf[i]);
+ for (; i < br_sz; i++)
+ color_fprintf(stdout, color, " ");
+ if (len >= br_sz) {
+ branch = (struct branch *)buf;
+ color_fprintf(stdout, color, " %"PRIx64" -> %"PRIx64" %s\n",
+ le64_to_cpu(branch->from),
+ le64_to_cpu(branch->to),
+ le64_to_cpu(branch->misc) & 0x10 ?
+ "pred" : "miss");
+ } else {
+ color_fprintf(stdout, color, " Bad record!\n");
+ }
+ pos += sz;
+ buf += sz;
+ len -= sz;
+ }
+}
+
+static void intel_bts_dump_event(struct intel_bts *bts, unsigned char *buf,
+ size_t len)
+{
+ printf(".\n");
+ intel_bts_dump(bts, buf, len);
+}
+
+static int intel_bts_lost(struct intel_bts *bts, struct perf_sample *sample)
+{
+ union perf_event event;
+ int err;
+
+ auxtrace_synth_error(&event.auxtrace_error, PERF_AUXTRACE_ERROR_ITRACE,
+ INTEL_BTS_ERR_LOST, sample->cpu, sample->pid,
+ sample->tid, 0, "Lost trace data");
+
+ err = perf_session__deliver_synth_event(bts->session, &event, NULL);
+ if (err)
+ pr_err("Intel BTS: failed to deliver error event, error %d\n",
+ err);
+
+ return err;
+}
+
+static struct intel_bts_queue *intel_bts_alloc_queue(struct intel_bts *bts,
+ unsigned int queue_nr)
+{
+ struct intel_bts_queue *btsq;
+
+ btsq = zalloc(sizeof(struct intel_bts_queue));
+ if (!btsq)
+ return NULL;
+
+ btsq->bts = bts;
+ btsq->queue_nr = queue_nr;
+ btsq->pid = -1;
+ btsq->tid = -1;
+ btsq->cpu = -1;
+
+ return btsq;
+}
+
+static int intel_bts_setup_queue(struct intel_bts *bts,
+ struct auxtrace_queue *queue,
+ unsigned int queue_nr)
+{
+ struct intel_bts_queue *btsq = queue->priv;
+
+ if (list_empty(&queue->head))
+ return 0;
+
+ if (!btsq) {
+ btsq = intel_bts_alloc_queue(bts, queue_nr);
+ if (!btsq)
+ return -ENOMEM;
+ queue->priv = btsq;
+
+ if (queue->cpu != -1)
+ btsq->cpu = queue->cpu;
+ btsq->tid = queue->tid;
+ }
+
+ if (bts->sampling_mode)
+ return 0;
+
+ if (!btsq->on_heap && !btsq->buffer) {
+ int ret;
+
+ btsq->buffer = auxtrace_buffer__next(queue, NULL);
+ if (!btsq->buffer)
+ return 0;
+
+ ret = auxtrace_heap__add(&bts->heap, queue_nr,
+ btsq->buffer->reference);
+ if (ret)
+ return ret;
+ btsq->on_heap = true;
+ }
+
+ return 0;
+}
+
+static int intel_bts_setup_queues(struct intel_bts *bts)
+{
+ unsigned int i;
+ int ret;
+
+ for (i = 0; i < bts->queues.nr_queues; i++) {
+ ret = intel_bts_setup_queue(bts, &bts->queues.queue_array[i],
+ i);
+ if (ret)
+ return ret;
+ }
+ return 0;
+}
+
+static inline int intel_bts_update_queues(struct intel_bts *bts)
+{
+ if (bts->queues.new_data) {
+ bts->queues.new_data = false;
+ return intel_bts_setup_queues(bts);
+ }
+ return 0;
+}
+
+static unsigned char *intel_bts_find_overlap(unsigned char *buf_a, size_t len_a,
+ unsigned char *buf_b, size_t len_b)
+{
+ size_t offs, len;
+
+ if (len_a > len_b)
+ offs = len_a - len_b;
+ else
+ offs = 0;
+
+ for (; offs < len_a; offs += sizeof(struct branch)) {
+ len = len_a - offs;
+ if (!memcmp(buf_a + offs, buf_b, len))
+ return buf_b + len;
+ }
+
+ return buf_b;
+}
+
+static int intel_bts_do_fix_overlap(struct auxtrace_queue *queue,
+ struct auxtrace_buffer *b)
+{
+ struct auxtrace_buffer *a;
+ void *start;
+
+ if (b->list.prev == &queue->head)
+ return 0;
+ a = list_entry(b->list.prev, struct auxtrace_buffer, list);
+ start = intel_bts_find_overlap(a->data, a->size, b->data, b->size);
+ if (!start)
+ return -EINVAL;
+ b->use_size = b->data + b->size - start;
+ b->use_data = start;
+ return 0;
+}
+
+static inline u8 intel_bts_cpumode(struct intel_bts *bts, uint64_t ip)
+{
+ return machine__kernel_ip(bts->machine, ip) ?
+ PERF_RECORD_MISC_KERNEL :
+ PERF_RECORD_MISC_USER;
+}
+
+static int intel_bts_synth_branch_sample(struct intel_bts_queue *btsq,
+ struct branch *branch)
+{
+ int ret;
+ struct intel_bts *bts = btsq->bts;
+ union perf_event event;
+ struct perf_sample sample = { .ip = 0, };
+
+ if (bts->synth_opts.initial_skip &&
+ bts->num_events++ <= bts->synth_opts.initial_skip)
+ return 0;
+
+ sample.ip = le64_to_cpu(branch->from);
+ sample.cpumode = intel_bts_cpumode(bts, sample.ip);
+ sample.pid = btsq->pid;
+ sample.tid = btsq->tid;
+ sample.addr = le64_to_cpu(branch->to);
+ sample.id = btsq->bts->branches_id;
+ sample.stream_id = btsq->bts->branches_id;
+ sample.period = 1;
+ sample.cpu = btsq->cpu;
+ sample.flags = btsq->sample_flags;
+ sample.insn_len = btsq->intel_pt_insn.length;
+ memcpy(sample.insn, btsq->intel_pt_insn.buf, INTEL_PT_INSN_BUF_SZ);
+
+ event.sample.header.type = PERF_RECORD_SAMPLE;
+ event.sample.header.misc = sample.cpumode;
+ event.sample.header.size = sizeof(struct perf_event_header);
+
+ if (bts->synth_opts.inject) {
+ event.sample.header.size = bts->branches_event_size;
+ ret = perf_event__synthesize_sample(&event,
+ bts->branches_sample_type,
+ 0, &sample);
+ if (ret)
+ return ret;
+ }
+
+ ret = perf_session__deliver_synth_event(bts->session, &event, &sample);
+ if (ret)
+ pr_err("Intel BTS: failed to deliver branch event, error %d\n",
+ ret);
+
+ return ret;
+}
+
+static int intel_bts_get_next_insn(struct intel_bts_queue *btsq, u64 ip)
+{
+ struct machine *machine = btsq->bts->machine;
+ struct thread *thread;
+ struct addr_location al;
+ unsigned char buf[INTEL_PT_INSN_BUF_SZ];
+ ssize_t len;
+ int x86_64;
+ uint8_t cpumode;
+ int err = -1;
+
+ if (machine__kernel_ip(machine, ip))
+ cpumode = PERF_RECORD_MISC_KERNEL;
+ else
+ cpumode = PERF_RECORD_MISC_USER;
+
+ thread = machine__find_thread(machine, -1, btsq->tid);
+ if (!thread)
+ return -1;
+
+ if (!thread__find_map(thread, cpumode, ip, &al) || !al.map->dso)
+ goto out_put;
+
+ len = dso__data_read_addr(al.map->dso, al.map, machine, ip, buf,
+ INTEL_PT_INSN_BUF_SZ);
+ if (len <= 0)
+ goto out_put;
+
+ /* Load maps to ensure dso->is_64_bit has been updated */
+ map__load(al.map);
+
+ x86_64 = al.map->dso->is_64_bit;
+
+ if (intel_pt_get_insn(buf, len, x86_64, &btsq->intel_pt_insn))
+ goto out_put;
+
+ err = 0;
+out_put:
+ thread__put(thread);
+ return err;
+}
+
+static int intel_bts_synth_error(struct intel_bts *bts, int cpu, pid_t pid,
+ pid_t tid, u64 ip)
+{
+ union perf_event event;
+ int err;
+
+ auxtrace_synth_error(&event.auxtrace_error, PERF_AUXTRACE_ERROR_ITRACE,
+ INTEL_BTS_ERR_NOINSN, cpu, pid, tid, ip,
+ "Failed to get instruction");
+
+ err = perf_session__deliver_synth_event(bts->session, &event, NULL);
+ if (err)
+ pr_err("Intel BTS: failed to deliver error event, error %d\n",
+ err);
+
+ return err;
+}
+
+static int intel_bts_get_branch_type(struct intel_bts_queue *btsq,
+ struct branch *branch)
+{
+ int err;
+
+ if (!branch->from) {
+ if (branch->to)
+ btsq->sample_flags = PERF_IP_FLAG_BRANCH |
+ PERF_IP_FLAG_TRACE_BEGIN;
+ else
+ btsq->sample_flags = 0;
+ btsq->intel_pt_insn.length = 0;
+ } else if (!branch->to) {
+ btsq->sample_flags = PERF_IP_FLAG_BRANCH |
+ PERF_IP_FLAG_TRACE_END;
+ btsq->intel_pt_insn.length = 0;
+ } else {
+ err = intel_bts_get_next_insn(btsq, branch->from);
+ if (err) {
+ btsq->sample_flags = 0;
+ btsq->intel_pt_insn.length = 0;
+ if (!btsq->bts->synth_opts.errors)
+ return 0;
+ err = intel_bts_synth_error(btsq->bts, btsq->cpu,
+ btsq->pid, btsq->tid,
+ branch->from);
+ return err;
+ }
+ btsq->sample_flags = intel_pt_insn_type(btsq->intel_pt_insn.op);
+ /* Check for an async branch into the kernel */
+ if (!machine__kernel_ip(btsq->bts->machine, branch->from) &&
+ machine__kernel_ip(btsq->bts->machine, branch->to) &&
+ btsq->sample_flags != (PERF_IP_FLAG_BRANCH |
+ PERF_IP_FLAG_CALL |
+ PERF_IP_FLAG_SYSCALLRET))
+ btsq->sample_flags = PERF_IP_FLAG_BRANCH |
+ PERF_IP_FLAG_CALL |
+ PERF_IP_FLAG_ASYNC |
+ PERF_IP_FLAG_INTERRUPT;
+ }
+
+ return 0;
+}
+
+static int intel_bts_process_buffer(struct intel_bts_queue *btsq,
+ struct auxtrace_buffer *buffer,
+ struct thread *thread)
+{
+ struct branch *branch;
+ size_t sz, bsz = sizeof(struct branch);
+ u32 filter = btsq->bts->branches_filter;
+ int err = 0;
+
+ if (buffer->use_data) {
+ sz = buffer->use_size;
+ branch = buffer->use_data;
+ } else {
+ sz = buffer->size;
+ branch = buffer->data;
+ }
+
+ if (!btsq->bts->sample_branches)
+ return 0;
+
+ for (; sz > bsz; branch += 1, sz -= bsz) {
+ if (!branch->from && !branch->to)
+ continue;
+ intel_bts_get_branch_type(btsq, branch);
+ if (btsq->bts->synth_opts.thread_stack)
+ thread_stack__event(thread, btsq->sample_flags,
+ le64_to_cpu(branch->from),
+ le64_to_cpu(branch->to),
+ btsq->intel_pt_insn.length,
+ buffer->buffer_nr + 1);
+ if (filter && !(filter & btsq->sample_flags))
+ continue;
+ err = intel_bts_synth_branch_sample(btsq, branch);
+ if (err)
+ break;
+ }
+ return err;
+}
+
+static int intel_bts_process_queue(struct intel_bts_queue *btsq, u64 *timestamp)
+{
+ struct auxtrace_buffer *buffer = btsq->buffer, *old_buffer = buffer;
+ struct auxtrace_queue *queue;
+ struct thread *thread;
+ int err;
+
+ if (btsq->done)
+ return 1;
+
+ if (btsq->pid == -1) {
+ thread = machine__find_thread(btsq->bts->machine, -1,
+ btsq->tid);
+ if (thread)
+ btsq->pid = thread->pid_;
+ } else {
+ thread = machine__findnew_thread(btsq->bts->machine, btsq->pid,
+ btsq->tid);
+ }
+
+ queue = &btsq->bts->queues.queue_array[btsq->queue_nr];
+
+ if (!buffer)
+ buffer = auxtrace_buffer__next(queue, NULL);
+
+ if (!buffer) {
+ if (!btsq->bts->sampling_mode)
+ btsq->done = 1;
+ err = 1;
+ goto out_put;
+ }
+
+ /* Currently there is no support for split buffers */
+ if (buffer->consecutive) {
+ err = -EINVAL;
+ goto out_put;
+ }
+
+ if (!buffer->data) {
+ int fd = perf_data__fd(btsq->bts->session->data);
+
+ buffer->data = auxtrace_buffer__get_data(buffer, fd);
+ if (!buffer->data) {
+ err = -ENOMEM;
+ goto out_put;
+ }
+ }
+
+ if (btsq->bts->snapshot_mode && !buffer->consecutive &&
+ intel_bts_do_fix_overlap(queue, buffer)) {
+ err = -ENOMEM;
+ goto out_put;
+ }
+
+ if (!btsq->bts->synth_opts.callchain &&
+ !btsq->bts->synth_opts.thread_stack && thread &&
+ (!old_buffer || btsq->bts->sampling_mode ||
+ (btsq->bts->snapshot_mode && !buffer->consecutive)))
+ thread_stack__set_trace_nr(thread, buffer->buffer_nr + 1);
+
+ err = intel_bts_process_buffer(btsq, buffer, thread);
+
+ auxtrace_buffer__drop_data(buffer);
+
+ btsq->buffer = auxtrace_buffer__next(queue, buffer);
+ if (btsq->buffer) {
+ if (timestamp)
+ *timestamp = btsq->buffer->reference;
+ } else {
+ if (!btsq->bts->sampling_mode)
+ btsq->done = 1;
+ }
+out_put:
+ thread__put(thread);
+ return err;
+}
+
+static int intel_bts_flush_queue(struct intel_bts_queue *btsq)
+{
+ u64 ts = 0;
+ int ret;
+
+ while (1) {
+ ret = intel_bts_process_queue(btsq, &ts);
+ if (ret < 0)
+ return ret;
+ if (ret)
+ break;
+ }
+ return 0;
+}
+
+static int intel_bts_process_tid_exit(struct intel_bts *bts, pid_t tid)
+{
+ struct auxtrace_queues *queues = &bts->queues;
+ unsigned int i;
+
+ for (i = 0; i < queues->nr_queues; i++) {
+ struct auxtrace_queue *queue = &bts->queues.queue_array[i];
+ struct intel_bts_queue *btsq = queue->priv;
+
+ if (btsq && btsq->tid == tid)
+ return intel_bts_flush_queue(btsq);
+ }
+ return 0;
+}
+
+static int intel_bts_process_queues(struct intel_bts *bts, u64 timestamp)
+{
+ while (1) {
+ unsigned int queue_nr;
+ struct auxtrace_queue *queue;
+ struct intel_bts_queue *btsq;
+ u64 ts = 0;
+ int ret;
+
+ if (!bts->heap.heap_cnt)
+ return 0;
+
+ if (bts->heap.heap_array[0].ordinal > timestamp)
+ return 0;
+
+ queue_nr = bts->heap.heap_array[0].queue_nr;
+ queue = &bts->queues.queue_array[queue_nr];
+ btsq = queue->priv;
+
+ auxtrace_heap__pop(&bts->heap);
+
+ ret = intel_bts_process_queue(btsq, &ts);
+ if (ret < 0) {
+ auxtrace_heap__add(&bts->heap, queue_nr, ts);
+ return ret;
+ }
+
+ if (!ret) {
+ ret = auxtrace_heap__add(&bts->heap, queue_nr, ts);
+ if (ret < 0)
+ return ret;
+ } else {
+ btsq->on_heap = false;
+ }
+ }
+
+ return 0;
+}
+
+static int intel_bts_process_event(struct perf_session *session,
+ union perf_event *event,
+ struct perf_sample *sample,
+ struct perf_tool *tool)
+{
+ struct intel_bts *bts = container_of(session->auxtrace, struct intel_bts,
+ auxtrace);
+ u64 timestamp;
+ int err;
+
+ if (dump_trace)
+ return 0;
+
+ if (!tool->ordered_events) {
+ pr_err("Intel BTS requires ordered events\n");
+ return -EINVAL;
+ }
+
+ if (sample->time && sample->time != (u64)-1)
+ timestamp = perf_time_to_tsc(sample->time, &bts->tc);
+ else
+ timestamp = 0;
+
+ err = intel_bts_update_queues(bts);
+ if (err)
+ return err;
+
+ err = intel_bts_process_queues(bts, timestamp);
+ if (err)
+ return err;
+ if (event->header.type == PERF_RECORD_EXIT) {
+ err = intel_bts_process_tid_exit(bts, event->fork.tid);
+ if (err)
+ return err;
+ }
+
+ if (event->header.type == PERF_RECORD_AUX &&
+ (event->aux.flags & PERF_AUX_FLAG_TRUNCATED) &&
+ bts->synth_opts.errors)
+ err = intel_bts_lost(bts, sample);
+
+ return err;
+}
+
+static int intel_bts_process_auxtrace_event(struct perf_session *session,
+ union perf_event *event,
+ struct perf_tool *tool __maybe_unused)
+{
+ struct intel_bts *bts = container_of(session->auxtrace, struct intel_bts,
+ auxtrace);
+
+ if (bts->sampling_mode)
+ return 0;
+
+ if (!bts->data_queued) {
+ struct auxtrace_buffer *buffer;
+ off_t data_offset;
+ int fd = perf_data__fd(session->data);
+ int err;
+
+ 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 = auxtrace_queues__add_event(&bts->queues, session, event,
+ data_offset, &buffer);
+ if (err)
+ return err;
+
+ /* Dump here now we have copied a piped trace out of the pipe */
+ if (dump_trace) {
+ if (auxtrace_buffer__get_data(buffer, fd)) {
+ intel_bts_dump_event(bts, buffer->data,
+ buffer->size);
+ auxtrace_buffer__put_data(buffer);
+ }
+ }
+ }
+
+ return 0;
+}
+
+static int intel_bts_flush(struct perf_session *session,
+ struct perf_tool *tool __maybe_unused)
+{
+ struct intel_bts *bts = container_of(session->auxtrace, struct intel_bts,
+ auxtrace);
+ int ret;
+
+ if (dump_trace || bts->sampling_mode)
+ return 0;
+
+ if (!tool->ordered_events)
+ return -EINVAL;
+
+ ret = intel_bts_update_queues(bts);
+ if (ret < 0)
+ return ret;
+
+ return intel_bts_process_queues(bts, MAX_TIMESTAMP);
+}
+
+static void intel_bts_free_queue(void *priv)
+{
+ struct intel_bts_queue *btsq = priv;
+
+ if (!btsq)
+ return;
+ free(btsq);
+}
+
+static void intel_bts_free_events(struct perf_session *session)
+{
+ struct intel_bts *bts = container_of(session->auxtrace, struct intel_bts,
+ auxtrace);
+ struct auxtrace_queues *queues = &bts->queues;
+ unsigned int i;
+
+ for (i = 0; i < queues->nr_queues; i++) {
+ intel_bts_free_queue(queues->queue_array[i].priv);
+ queues->queue_array[i].priv = NULL;
+ }
+ auxtrace_queues__free(queues);
+}
+
+static void intel_bts_free(struct perf_session *session)
+{
+ struct intel_bts *bts = container_of(session->auxtrace, struct intel_bts,
+ auxtrace);
+
+ auxtrace_heap__free(&bts->heap);
+ intel_bts_free_events(session);
+ session->auxtrace = NULL;
+ free(bts);
+}
+
+struct intel_bts_synth {
+ struct perf_tool dummy_tool;
+ struct perf_session *session;
+};
+
+static int intel_bts_event_synth(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_sample *sample __maybe_unused,
+ struct machine *machine __maybe_unused)
+{
+ struct intel_bts_synth *intel_bts_synth =
+ container_of(tool, struct intel_bts_synth, dummy_tool);
+
+ return perf_session__deliver_synth_event(intel_bts_synth->session,
+ event, NULL);
+}
+
+static int intel_bts_synth_event(struct perf_session *session,
+ struct perf_event_attr *attr, u64 id)
+{
+ struct intel_bts_synth intel_bts_synth;
+
+ memset(&intel_bts_synth, 0, sizeof(struct intel_bts_synth));
+ intel_bts_synth.session = session;
+
+ return perf_event__synthesize_attr(&intel_bts_synth.dummy_tool, attr, 1,
+ &id, intel_bts_event_synth);
+}
+
+static int intel_bts_synth_events(struct intel_bts *bts,
+ 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 == bts->pmu_type && evsel->ids) {
+ found = true;
+ break;
+ }
+ }
+
+ if (!found) {
+ pr_debug("There are no selected events with Intel BTS 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;
+ attr.sample_type &= ~(u64)PERF_SAMPLE_TIME;
+ attr.sample_type &= ~(u64)PERF_SAMPLE_CPU;
+ 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;
+
+ id = evsel->id[0] + 1000000000;
+ if (!id)
+ id = 1;
+
+ if (bts->synth_opts.branches) {
+ attr.config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS;
+ attr.sample_period = 1;
+ attr.sample_type |= PERF_SAMPLE_ADDR;
+ pr_debug("Synthesizing 'branches' event with id %" PRIu64 " sample type %#" PRIx64 "\n",
+ id, (u64)attr.sample_type);
+ err = intel_bts_synth_event(session, &attr, id);
+ if (err) {
+ pr_err("%s: failed to synthesize 'branches' event type\n",
+ __func__);
+ return err;
+ }
+ bts->sample_branches = true;
+ bts->branches_sample_type = attr.sample_type;
+ bts->branches_id = id;
+ /*
+ * We only use sample types from PERF_SAMPLE_MASK so we can use
+ * __perf_evsel__sample_size() here.
+ */
+ bts->branches_event_size = sizeof(struct sample_event) +
+ __perf_evsel__sample_size(attr.sample_type);
+ }
+
+ return 0;
+}
+
+static const char * const intel_bts_info_fmts[] = {
+ [INTEL_BTS_PMU_TYPE] = " PMU Type %"PRId64"\n",
+ [INTEL_BTS_TIME_SHIFT] = " Time Shift %"PRIu64"\n",
+ [INTEL_BTS_TIME_MULT] = " Time Muliplier %"PRIu64"\n",
+ [INTEL_BTS_TIME_ZERO] = " Time Zero %"PRIu64"\n",
+ [INTEL_BTS_CAP_USER_TIME_ZERO] = " Cap Time Zero %"PRId64"\n",
+ [INTEL_BTS_SNAPSHOT_MODE] = " Snapshot mode %"PRId64"\n",
+};
+
+static void intel_bts_print_info(u64 *arr, int start, int finish)
+{
+ int i;
+
+ if (!dump_trace)
+ return;
+
+ for (i = start; i <= finish; i++)
+ fprintf(stdout, intel_bts_info_fmts[i], arr[i]);
+}
+
+int intel_bts_process_auxtrace_info(union perf_event *event,
+ struct perf_session *session)
+{
+ struct auxtrace_info_event *auxtrace_info = &event->auxtrace_info;
+ size_t min_sz = sizeof(u64) * INTEL_BTS_SNAPSHOT_MODE;
+ struct intel_bts *bts;
+ int err;
+
+ if (auxtrace_info->header.size < sizeof(struct auxtrace_info_event) +
+ min_sz)
+ return -EINVAL;
+
+ bts = zalloc(sizeof(struct intel_bts));
+ if (!bts)
+ return -ENOMEM;
+
+ err = auxtrace_queues__init(&bts->queues);
+ if (err)
+ goto err_free;
+
+ bts->session = session;
+ bts->machine = &session->machines.host; /* No kvm support */
+ bts->auxtrace_type = auxtrace_info->type;
+ bts->pmu_type = auxtrace_info->priv[INTEL_BTS_PMU_TYPE];
+ bts->tc.time_shift = auxtrace_info->priv[INTEL_BTS_TIME_SHIFT];
+ bts->tc.time_mult = auxtrace_info->priv[INTEL_BTS_TIME_MULT];
+ bts->tc.time_zero = auxtrace_info->priv[INTEL_BTS_TIME_ZERO];
+ bts->cap_user_time_zero =
+ auxtrace_info->priv[INTEL_BTS_CAP_USER_TIME_ZERO];
+ bts->snapshot_mode = auxtrace_info->priv[INTEL_BTS_SNAPSHOT_MODE];
+
+ bts->sampling_mode = false;
+
+ bts->auxtrace.process_event = intel_bts_process_event;
+ bts->auxtrace.process_auxtrace_event = intel_bts_process_auxtrace_event;
+ bts->auxtrace.flush_events = intel_bts_flush;
+ bts->auxtrace.free_events = intel_bts_free_events;
+ bts->auxtrace.free = intel_bts_free;
+ session->auxtrace = &bts->auxtrace;
+
+ intel_bts_print_info(&auxtrace_info->priv[0], INTEL_BTS_PMU_TYPE,
+ INTEL_BTS_SNAPSHOT_MODE);
+
+ if (dump_trace)
+ return 0;
+
+ if (session->itrace_synth_opts && session->itrace_synth_opts->set) {
+ bts->synth_opts = *session->itrace_synth_opts;
+ } else {
+ itrace_synth_opts__set_default(&bts->synth_opts);
+ if (session->itrace_synth_opts)
+ bts->synth_opts.thread_stack =
+ session->itrace_synth_opts->thread_stack;
+ }
+
+ if (bts->synth_opts.calls)
+ bts->branches_filter |= PERF_IP_FLAG_CALL | PERF_IP_FLAG_ASYNC |
+ PERF_IP_FLAG_TRACE_END;
+ if (bts->synth_opts.returns)
+ bts->branches_filter |= PERF_IP_FLAG_RETURN |
+ PERF_IP_FLAG_TRACE_BEGIN;
+
+ err = intel_bts_synth_events(bts, session);
+ if (err)
+ goto err_free_queues;
+
+ err = auxtrace_queues__process_index(&bts->queues, session);
+ if (err)
+ goto err_free_queues;
+
+ if (bts->queues.populated)
+ bts->data_queued = true;
+
+ return 0;
+
+err_free_queues:
+ auxtrace_queues__free(&bts->queues);
+ session->auxtrace = NULL;
+err_free:
+ free(bts);
+ return err;
+}