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-rw-r--r--tools/perf/util/intel-bts.c933
1 files changed, 933 insertions, 0 deletions
diff --git a/tools/perf/util/intel-bts.c b/tools/perf/util/intel-bts.c
new file mode 100644
index 000000000000..ea768625ab5b
--- /dev/null
+++ b/tools/perf/util/intel-bts.c
@@ -0,0 +1,933 @@
1/*
2 * intel-bts.c: Intel Processor Trace support
3 * Copyright (c) 2013-2015, Intel Corporation.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 */
15
16#include <endian.h>
17#include <byteswap.h>
18#include <linux/kernel.h>
19#include <linux/types.h>
20#include <linux/bitops.h>
21#include <linux/log2.h>
22
23#include "cpumap.h"
24#include "color.h"
25#include "evsel.h"
26#include "evlist.h"
27#include "machine.h"
28#include "session.h"
29#include "util.h"
30#include "thread.h"
31#include "thread-stack.h"
32#include "debug.h"
33#include "tsc.h"
34#include "auxtrace.h"
35#include "intel-pt-decoder/intel-pt-insn-decoder.h"
36#include "intel-bts.h"
37
38#define MAX_TIMESTAMP (~0ULL)
39
40#define INTEL_BTS_ERR_NOINSN 5
41#define INTEL_BTS_ERR_LOST 9
42
43#if __BYTE_ORDER == __BIG_ENDIAN
44#define le64_to_cpu bswap_64
45#else
46#define le64_to_cpu
47#endif
48
49struct intel_bts {
50 struct auxtrace auxtrace;
51 struct auxtrace_queues queues;
52 struct auxtrace_heap heap;
53 u32 auxtrace_type;
54 struct perf_session *session;
55 struct machine *machine;
56 bool sampling_mode;
57 bool snapshot_mode;
58 bool data_queued;
59 u32 pmu_type;
60 struct perf_tsc_conversion tc;
61 bool cap_user_time_zero;
62 struct itrace_synth_opts synth_opts;
63 bool sample_branches;
64 u32 branches_filter;
65 u64 branches_sample_type;
66 u64 branches_id;
67 size_t branches_event_size;
68 bool synth_needs_swap;
69};
70
71struct intel_bts_queue {
72 struct intel_bts *bts;
73 unsigned int queue_nr;
74 struct auxtrace_buffer *buffer;
75 bool on_heap;
76 bool done;
77 pid_t pid;
78 pid_t tid;
79 int cpu;
80 u64 time;
81 struct intel_pt_insn intel_pt_insn;
82 u32 sample_flags;
83};
84
85struct branch {
86 u64 from;
87 u64 to;
88 u64 misc;
89};
90
91static void intel_bts_dump(struct intel_bts *bts __maybe_unused,
92 unsigned char *buf, size_t len)
93{
94 struct branch *branch;
95 size_t i, pos = 0, br_sz = sizeof(struct branch), sz;
96 const char *color = PERF_COLOR_BLUE;
97
98 color_fprintf(stdout, color,
99 ". ... Intel BTS data: size %zu bytes\n",
100 len);
101
102 while (len) {
103 if (len >= br_sz)
104 sz = br_sz;
105 else
106 sz = len;
107 printf(".");
108 color_fprintf(stdout, color, " %08x: ", pos);
109 for (i = 0; i < sz; i++)
110 color_fprintf(stdout, color, " %02x", buf[i]);
111 for (; i < br_sz; i++)
112 color_fprintf(stdout, color, " ");
113 if (len >= br_sz) {
114 branch = (struct branch *)buf;
115 color_fprintf(stdout, color, " %"PRIx64" -> %"PRIx64" %s\n",
116 le64_to_cpu(branch->from),
117 le64_to_cpu(branch->to),
118 le64_to_cpu(branch->misc) & 0x10 ?
119 "pred" : "miss");
120 } else {
121 color_fprintf(stdout, color, " Bad record!\n");
122 }
123 pos += sz;
124 buf += sz;
125 len -= sz;
126 }
127}
128
129static void intel_bts_dump_event(struct intel_bts *bts, unsigned char *buf,
130 size_t len)
131{
132 printf(".\n");
133 intel_bts_dump(bts, buf, len);
134}
135
136static int intel_bts_lost(struct intel_bts *bts, struct perf_sample *sample)
137{
138 union perf_event event;
139 int err;
140
141 auxtrace_synth_error(&event.auxtrace_error, PERF_AUXTRACE_ERROR_ITRACE,
142 INTEL_BTS_ERR_LOST, sample->cpu, sample->pid,
143 sample->tid, 0, "Lost trace data");
144
145 err = perf_session__deliver_synth_event(bts->session, &event, NULL);
146 if (err)
147 pr_err("Intel BTS: failed to deliver error event, error %d\n",
148 err);
149
150 return err;
151}
152
153static struct intel_bts_queue *intel_bts_alloc_queue(struct intel_bts *bts,
154 unsigned int queue_nr)
155{
156 struct intel_bts_queue *btsq;
157
158 btsq = zalloc(sizeof(struct intel_bts_queue));
159 if (!btsq)
160 return NULL;
161
162 btsq->bts = bts;
163 btsq->queue_nr = queue_nr;
164 btsq->pid = -1;
165 btsq->tid = -1;
166 btsq->cpu = -1;
167
168 return btsq;
169}
170
171static int intel_bts_setup_queue(struct intel_bts *bts,
172 struct auxtrace_queue *queue,
173 unsigned int queue_nr)
174{
175 struct intel_bts_queue *btsq = queue->priv;
176
177 if (list_empty(&queue->head))
178 return 0;
179
180 if (!btsq) {
181 btsq = intel_bts_alloc_queue(bts, queue_nr);
182 if (!btsq)
183 return -ENOMEM;
184 queue->priv = btsq;
185
186 if (queue->cpu != -1)
187 btsq->cpu = queue->cpu;
188 btsq->tid = queue->tid;
189 }
190
191 if (bts->sampling_mode)
192 return 0;
193
194 if (!btsq->on_heap && !btsq->buffer) {
195 int ret;
196
197 btsq->buffer = auxtrace_buffer__next(queue, NULL);
198 if (!btsq->buffer)
199 return 0;
200
201 ret = auxtrace_heap__add(&bts->heap, queue_nr,
202 btsq->buffer->reference);
203 if (ret)
204 return ret;
205 btsq->on_heap = true;
206 }
207
208 return 0;
209}
210
211static int intel_bts_setup_queues(struct intel_bts *bts)
212{
213 unsigned int i;
214 int ret;
215
216 for (i = 0; i < bts->queues.nr_queues; i++) {
217 ret = intel_bts_setup_queue(bts, &bts->queues.queue_array[i],
218 i);
219 if (ret)
220 return ret;
221 }
222 return 0;
223}
224
225static inline int intel_bts_update_queues(struct intel_bts *bts)
226{
227 if (bts->queues.new_data) {
228 bts->queues.new_data = false;
229 return intel_bts_setup_queues(bts);
230 }
231 return 0;
232}
233
234static unsigned char *intel_bts_find_overlap(unsigned char *buf_a, size_t len_a,
235 unsigned char *buf_b, size_t len_b)
236{
237 size_t offs, len;
238
239 if (len_a > len_b)
240 offs = len_a - len_b;
241 else
242 offs = 0;
243
244 for (; offs < len_a; offs += sizeof(struct branch)) {
245 len = len_a - offs;
246 if (!memcmp(buf_a + offs, buf_b, len))
247 return buf_b + len;
248 }
249
250 return buf_b;
251}
252
253static int intel_bts_do_fix_overlap(struct auxtrace_queue *queue,
254 struct auxtrace_buffer *b)
255{
256 struct auxtrace_buffer *a;
257 void *start;
258
259 if (b->list.prev == &queue->head)
260 return 0;
261 a = list_entry(b->list.prev, struct auxtrace_buffer, list);
262 start = intel_bts_find_overlap(a->data, a->size, b->data, b->size);
263 if (!start)
264 return -EINVAL;
265 b->use_size = b->data + b->size - start;
266 b->use_data = start;
267 return 0;
268}
269
270static int intel_bts_synth_branch_sample(struct intel_bts_queue *btsq,
271 struct branch *branch)
272{
273 int ret;
274 struct intel_bts *bts = btsq->bts;
275 union perf_event event;
276 struct perf_sample sample = { .ip = 0, };
277
278 event.sample.header.type = PERF_RECORD_SAMPLE;
279 event.sample.header.misc = PERF_RECORD_MISC_USER;
280 event.sample.header.size = sizeof(struct perf_event_header);
281
282 sample.ip = le64_to_cpu(branch->from);
283 sample.pid = btsq->pid;
284 sample.tid = btsq->tid;
285 sample.addr = le64_to_cpu(branch->to);
286 sample.id = btsq->bts->branches_id;
287 sample.stream_id = btsq->bts->branches_id;
288 sample.period = 1;
289 sample.cpu = btsq->cpu;
290 sample.flags = btsq->sample_flags;
291 sample.insn_len = btsq->intel_pt_insn.length;
292
293 if (bts->synth_opts.inject) {
294 event.sample.header.size = bts->branches_event_size;
295 ret = perf_event__synthesize_sample(&event,
296 bts->branches_sample_type,
297 0, &sample,
298 bts->synth_needs_swap);
299 if (ret)
300 return ret;
301 }
302
303 ret = perf_session__deliver_synth_event(bts->session, &event, &sample);
304 if (ret)
305 pr_err("Intel BTS: failed to deliver branch event, error %d\n",
306 ret);
307
308 return ret;
309}
310
311static int intel_bts_get_next_insn(struct intel_bts_queue *btsq, u64 ip)
312{
313 struct machine *machine = btsq->bts->machine;
314 struct thread *thread;
315 struct addr_location al;
316 unsigned char buf[1024];
317 size_t bufsz;
318 ssize_t len;
319 int x86_64;
320 uint8_t cpumode;
321 int err = -1;
322
323 bufsz = intel_pt_insn_max_size();
324
325 if (machine__kernel_ip(machine, ip))
326 cpumode = PERF_RECORD_MISC_KERNEL;
327 else
328 cpumode = PERF_RECORD_MISC_USER;
329
330 thread = machine__find_thread(machine, -1, btsq->tid);
331 if (!thread)
332 return -1;
333
334 thread__find_addr_map(thread, cpumode, MAP__FUNCTION, ip, &al);
335 if (!al.map || !al.map->dso)
336 goto out_put;
337
338 len = dso__data_read_addr(al.map->dso, al.map, machine, ip, buf, bufsz);
339 if (len <= 0)
340 goto out_put;
341
342 /* Load maps to ensure dso->is_64_bit has been updated */
343 map__load(al.map, machine->symbol_filter);
344
345 x86_64 = al.map->dso->is_64_bit;
346
347 if (intel_pt_get_insn(buf, len, x86_64, &btsq->intel_pt_insn))
348 goto out_put;
349
350 err = 0;
351out_put:
352 thread__put(thread);
353 return err;
354}
355
356static int intel_bts_synth_error(struct intel_bts *bts, int cpu, pid_t pid,
357 pid_t tid, u64 ip)
358{
359 union perf_event event;
360 int err;
361
362 auxtrace_synth_error(&event.auxtrace_error, PERF_AUXTRACE_ERROR_ITRACE,
363 INTEL_BTS_ERR_NOINSN, cpu, pid, tid, ip,
364 "Failed to get instruction");
365
366 err = perf_session__deliver_synth_event(bts->session, &event, NULL);
367 if (err)
368 pr_err("Intel BTS: failed to deliver error event, error %d\n",
369 err);
370
371 return err;
372}
373
374static int intel_bts_get_branch_type(struct intel_bts_queue *btsq,
375 struct branch *branch)
376{
377 int err;
378
379 if (!branch->from) {
380 if (branch->to)
381 btsq->sample_flags = PERF_IP_FLAG_BRANCH |
382 PERF_IP_FLAG_TRACE_BEGIN;
383 else
384 btsq->sample_flags = 0;
385 btsq->intel_pt_insn.length = 0;
386 } else if (!branch->to) {
387 btsq->sample_flags = PERF_IP_FLAG_BRANCH |
388 PERF_IP_FLAG_TRACE_END;
389 btsq->intel_pt_insn.length = 0;
390 } else {
391 err = intel_bts_get_next_insn(btsq, branch->from);
392 if (err) {
393 btsq->sample_flags = 0;
394 btsq->intel_pt_insn.length = 0;
395 if (!btsq->bts->synth_opts.errors)
396 return 0;
397 err = intel_bts_synth_error(btsq->bts, btsq->cpu,
398 btsq->pid, btsq->tid,
399 branch->from);
400 return err;
401 }
402 btsq->sample_flags = intel_pt_insn_type(btsq->intel_pt_insn.op);
403 /* Check for an async branch into the kernel */
404 if (!machine__kernel_ip(btsq->bts->machine, branch->from) &&
405 machine__kernel_ip(btsq->bts->machine, branch->to) &&
406 btsq->sample_flags != (PERF_IP_FLAG_BRANCH |
407 PERF_IP_FLAG_CALL |
408 PERF_IP_FLAG_SYSCALLRET))
409 btsq->sample_flags = PERF_IP_FLAG_BRANCH |
410 PERF_IP_FLAG_CALL |
411 PERF_IP_FLAG_ASYNC |
412 PERF_IP_FLAG_INTERRUPT;
413 }
414
415 return 0;
416}
417
418static int intel_bts_process_buffer(struct intel_bts_queue *btsq,
419 struct auxtrace_buffer *buffer)
420{
421 struct branch *branch;
422 size_t sz, bsz = sizeof(struct branch);
423 u32 filter = btsq->bts->branches_filter;
424 int err = 0;
425
426 if (buffer->use_data) {
427 sz = buffer->use_size;
428 branch = buffer->use_data;
429 } else {
430 sz = buffer->size;
431 branch = buffer->data;
432 }
433
434 if (!btsq->bts->sample_branches)
435 return 0;
436
437 for (; sz > bsz; branch += 1, sz -= bsz) {
438 if (!branch->from && !branch->to)
439 continue;
440 intel_bts_get_branch_type(btsq, branch);
441 if (filter && !(filter & btsq->sample_flags))
442 continue;
443 err = intel_bts_synth_branch_sample(btsq, branch);
444 if (err)
445 break;
446 }
447 return err;
448}
449
450static int intel_bts_process_queue(struct intel_bts_queue *btsq, u64 *timestamp)
451{
452 struct auxtrace_buffer *buffer = btsq->buffer, *old_buffer = buffer;
453 struct auxtrace_queue *queue;
454 struct thread *thread;
455 int err;
456
457 if (btsq->done)
458 return 1;
459
460 if (btsq->pid == -1) {
461 thread = machine__find_thread(btsq->bts->machine, -1,
462 btsq->tid);
463 if (thread)
464 btsq->pid = thread->pid_;
465 } else {
466 thread = machine__findnew_thread(btsq->bts->machine, btsq->pid,
467 btsq->tid);
468 }
469
470 queue = &btsq->bts->queues.queue_array[btsq->queue_nr];
471
472 if (!buffer)
473 buffer = auxtrace_buffer__next(queue, NULL);
474
475 if (!buffer) {
476 if (!btsq->bts->sampling_mode)
477 btsq->done = 1;
478 err = 1;
479 goto out_put;
480 }
481
482 /* Currently there is no support for split buffers */
483 if (buffer->consecutive) {
484 err = -EINVAL;
485 goto out_put;
486 }
487
488 if (!buffer->data) {
489 int fd = perf_data_file__fd(btsq->bts->session->file);
490
491 buffer->data = auxtrace_buffer__get_data(buffer, fd);
492 if (!buffer->data) {
493 err = -ENOMEM;
494 goto out_put;
495 }
496 }
497
498 if (btsq->bts->snapshot_mode && !buffer->consecutive &&
499 intel_bts_do_fix_overlap(queue, buffer)) {
500 err = -ENOMEM;
501 goto out_put;
502 }
503
504 if (!btsq->bts->synth_opts.callchain && thread &&
505 (!old_buffer || btsq->bts->sampling_mode ||
506 (btsq->bts->snapshot_mode && !buffer->consecutive)))
507 thread_stack__set_trace_nr(thread, buffer->buffer_nr + 1);
508
509 err = intel_bts_process_buffer(btsq, buffer);
510
511 auxtrace_buffer__drop_data(buffer);
512
513 btsq->buffer = auxtrace_buffer__next(queue, buffer);
514 if (btsq->buffer) {
515 if (timestamp)
516 *timestamp = btsq->buffer->reference;
517 } else {
518 if (!btsq->bts->sampling_mode)
519 btsq->done = 1;
520 }
521out_put:
522 thread__put(thread);
523 return err;
524}
525
526static int intel_bts_flush_queue(struct intel_bts_queue *btsq)
527{
528 u64 ts = 0;
529 int ret;
530
531 while (1) {
532 ret = intel_bts_process_queue(btsq, &ts);
533 if (ret < 0)
534 return ret;
535 if (ret)
536 break;
537 }
538 return 0;
539}
540
541static int intel_bts_process_tid_exit(struct intel_bts *bts, pid_t tid)
542{
543 struct auxtrace_queues *queues = &bts->queues;
544 unsigned int i;
545
546 for (i = 0; i < queues->nr_queues; i++) {
547 struct auxtrace_queue *queue = &bts->queues.queue_array[i];
548 struct intel_bts_queue *btsq = queue->priv;
549
550 if (btsq && btsq->tid == tid)
551 return intel_bts_flush_queue(btsq);
552 }
553 return 0;
554}
555
556static int intel_bts_process_queues(struct intel_bts *bts, u64 timestamp)
557{
558 while (1) {
559 unsigned int queue_nr;
560 struct auxtrace_queue *queue;
561 struct intel_bts_queue *btsq;
562 u64 ts = 0;
563 int ret;
564
565 if (!bts->heap.heap_cnt)
566 return 0;
567
568 if (bts->heap.heap_array[0].ordinal > timestamp)
569 return 0;
570
571 queue_nr = bts->heap.heap_array[0].queue_nr;
572 queue = &bts->queues.queue_array[queue_nr];
573 btsq = queue->priv;
574
575 auxtrace_heap__pop(&bts->heap);
576
577 ret = intel_bts_process_queue(btsq, &ts);
578 if (ret < 0) {
579 auxtrace_heap__add(&bts->heap, queue_nr, ts);
580 return ret;
581 }
582
583 if (!ret) {
584 ret = auxtrace_heap__add(&bts->heap, queue_nr, ts);
585 if (ret < 0)
586 return ret;
587 } else {
588 btsq->on_heap = false;
589 }
590 }
591
592 return 0;
593}
594
595static int intel_bts_process_event(struct perf_session *session,
596 union perf_event *event,
597 struct perf_sample *sample,
598 struct perf_tool *tool)
599{
600 struct intel_bts *bts = container_of(session->auxtrace, struct intel_bts,
601 auxtrace);
602 u64 timestamp;
603 int err;
604
605 if (dump_trace)
606 return 0;
607
608 if (!tool->ordered_events) {
609 pr_err("Intel BTS requires ordered events\n");
610 return -EINVAL;
611 }
612
613 if (sample->time && sample->time != (u64)-1)
614 timestamp = perf_time_to_tsc(sample->time, &bts->tc);
615 else
616 timestamp = 0;
617
618 err = intel_bts_update_queues(bts);
619 if (err)
620 return err;
621
622 err = intel_bts_process_queues(bts, timestamp);
623 if (err)
624 return err;
625 if (event->header.type == PERF_RECORD_EXIT) {
626 err = intel_bts_process_tid_exit(bts, event->comm.tid);
627 if (err)
628 return err;
629 }
630
631 if (event->header.type == PERF_RECORD_AUX &&
632 (event->aux.flags & PERF_AUX_FLAG_TRUNCATED) &&
633 bts->synth_opts.errors)
634 err = intel_bts_lost(bts, sample);
635
636 return err;
637}
638
639static int intel_bts_process_auxtrace_event(struct perf_session *session,
640 union perf_event *event,
641 struct perf_tool *tool __maybe_unused)
642{
643 struct intel_bts *bts = container_of(session->auxtrace, struct intel_bts,
644 auxtrace);
645
646 if (bts->sampling_mode)
647 return 0;
648
649 if (!bts->data_queued) {
650 struct auxtrace_buffer *buffer;
651 off_t data_offset;
652 int fd = perf_data_file__fd(session->file);
653 int err;
654
655 if (perf_data_file__is_pipe(session->file)) {
656 data_offset = 0;
657 } else {
658 data_offset = lseek(fd, 0, SEEK_CUR);
659 if (data_offset == -1)
660 return -errno;
661 }
662
663 err = auxtrace_queues__add_event(&bts->queues, session, event,
664 data_offset, &buffer);
665 if (err)
666 return err;
667
668 /* Dump here now we have copied a piped trace out of the pipe */
669 if (dump_trace) {
670 if (auxtrace_buffer__get_data(buffer, fd)) {
671 intel_bts_dump_event(bts, buffer->data,
672 buffer->size);
673 auxtrace_buffer__put_data(buffer);
674 }
675 }
676 }
677
678 return 0;
679}
680
681static int intel_bts_flush(struct perf_session *session __maybe_unused,
682 struct perf_tool *tool __maybe_unused)
683{
684 struct intel_bts *bts = container_of(session->auxtrace, struct intel_bts,
685 auxtrace);
686 int ret;
687
688 if (dump_trace || bts->sampling_mode)
689 return 0;
690
691 if (!tool->ordered_events)
692 return -EINVAL;
693
694 ret = intel_bts_update_queues(bts);
695 if (ret < 0)
696 return ret;
697
698 return intel_bts_process_queues(bts, MAX_TIMESTAMP);
699}
700
701static void intel_bts_free_queue(void *priv)
702{
703 struct intel_bts_queue *btsq = priv;
704
705 if (!btsq)
706 return;
707 free(btsq);
708}
709
710static void intel_bts_free_events(struct perf_session *session)
711{
712 struct intel_bts *bts = container_of(session->auxtrace, struct intel_bts,
713 auxtrace);
714 struct auxtrace_queues *queues = &bts->queues;
715 unsigned int i;
716
717 for (i = 0; i < queues->nr_queues; i++) {
718 intel_bts_free_queue(queues->queue_array[i].priv);
719 queues->queue_array[i].priv = NULL;
720 }
721 auxtrace_queues__free(queues);
722}
723
724static void intel_bts_free(struct perf_session *session)
725{
726 struct intel_bts *bts = container_of(session->auxtrace, struct intel_bts,
727 auxtrace);
728
729 auxtrace_heap__free(&bts->heap);
730 intel_bts_free_events(session);
731 session->auxtrace = NULL;
732 free(bts);
733}
734
735struct intel_bts_synth {
736 struct perf_tool dummy_tool;
737 struct perf_session *session;
738};
739
740static int intel_bts_event_synth(struct perf_tool *tool,
741 union perf_event *event,
742 struct perf_sample *sample __maybe_unused,
743 struct machine *machine __maybe_unused)
744{
745 struct intel_bts_synth *intel_bts_synth =
746 container_of(tool, struct intel_bts_synth, dummy_tool);
747
748 return perf_session__deliver_synth_event(intel_bts_synth->session,
749 event, NULL);
750}
751
752static int intel_bts_synth_event(struct perf_session *session,
753 struct perf_event_attr *attr, u64 id)
754{
755 struct intel_bts_synth intel_bts_synth;
756
757 memset(&intel_bts_synth, 0, sizeof(struct intel_bts_synth));
758 intel_bts_synth.session = session;
759
760 return perf_event__synthesize_attr(&intel_bts_synth.dummy_tool, attr, 1,
761 &id, intel_bts_event_synth);
762}
763
764static int intel_bts_synth_events(struct intel_bts *bts,
765 struct perf_session *session)
766{
767 struct perf_evlist *evlist = session->evlist;
768 struct perf_evsel *evsel;
769 struct perf_event_attr attr;
770 bool found = false;
771 u64 id;
772 int err;
773
774 evlist__for_each(evlist, evsel) {
775 if (evsel->attr.type == bts->pmu_type && evsel->ids) {
776 found = true;
777 break;
778 }
779 }
780
781 if (!found) {
782 pr_debug("There are no selected events with Intel BTS data\n");
783 return 0;
784 }
785
786 memset(&attr, 0, sizeof(struct perf_event_attr));
787 attr.size = sizeof(struct perf_event_attr);
788 attr.type = PERF_TYPE_HARDWARE;
789 attr.sample_type = evsel->attr.sample_type & PERF_SAMPLE_MASK;
790 attr.sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID |
791 PERF_SAMPLE_PERIOD;
792 attr.sample_type &= ~(u64)PERF_SAMPLE_TIME;
793 attr.sample_type &= ~(u64)PERF_SAMPLE_CPU;
794 attr.exclude_user = evsel->attr.exclude_user;
795 attr.exclude_kernel = evsel->attr.exclude_kernel;
796 attr.exclude_hv = evsel->attr.exclude_hv;
797 attr.exclude_host = evsel->attr.exclude_host;
798 attr.exclude_guest = evsel->attr.exclude_guest;
799 attr.sample_id_all = evsel->attr.sample_id_all;
800 attr.read_format = evsel->attr.read_format;
801
802 id = evsel->id[0] + 1000000000;
803 if (!id)
804 id = 1;
805
806 if (bts->synth_opts.branches) {
807 attr.config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS;
808 attr.sample_period = 1;
809 attr.sample_type |= PERF_SAMPLE_ADDR;
810 pr_debug("Synthesizing 'branches' event with id %" PRIu64 " sample type %#" PRIx64 "\n",
811 id, (u64)attr.sample_type);
812 err = intel_bts_synth_event(session, &attr, id);
813 if (err) {
814 pr_err("%s: failed to synthesize 'branches' event type\n",
815 __func__);
816 return err;
817 }
818 bts->sample_branches = true;
819 bts->branches_sample_type = attr.sample_type;
820 bts->branches_id = id;
821 /*
822 * We only use sample types from PERF_SAMPLE_MASK so we can use
823 * __perf_evsel__sample_size() here.
824 */
825 bts->branches_event_size = sizeof(struct sample_event) +
826 __perf_evsel__sample_size(attr.sample_type);
827 }
828
829 bts->synth_needs_swap = evsel->needs_swap;
830
831 return 0;
832}
833
834static const char * const intel_bts_info_fmts[] = {
835 [INTEL_BTS_PMU_TYPE] = " PMU Type %"PRId64"\n",
836 [INTEL_BTS_TIME_SHIFT] = " Time Shift %"PRIu64"\n",
837 [INTEL_BTS_TIME_MULT] = " Time Muliplier %"PRIu64"\n",
838 [INTEL_BTS_TIME_ZERO] = " Time Zero %"PRIu64"\n",
839 [INTEL_BTS_CAP_USER_TIME_ZERO] = " Cap Time Zero %"PRId64"\n",
840 [INTEL_BTS_SNAPSHOT_MODE] = " Snapshot mode %"PRId64"\n",
841};
842
843static void intel_bts_print_info(u64 *arr, int start, int finish)
844{
845 int i;
846
847 if (!dump_trace)
848 return;
849
850 for (i = start; i <= finish; i++)
851 fprintf(stdout, intel_bts_info_fmts[i], arr[i]);
852}
853
854u64 intel_bts_auxtrace_info_priv[INTEL_BTS_AUXTRACE_PRIV_SIZE];
855
856int intel_bts_process_auxtrace_info(union perf_event *event,
857 struct perf_session *session)
858{
859 struct auxtrace_info_event *auxtrace_info = &event->auxtrace_info;
860 size_t min_sz = sizeof(u64) * INTEL_BTS_SNAPSHOT_MODE;
861 struct intel_bts *bts;
862 int err;
863
864 if (auxtrace_info->header.size < sizeof(struct auxtrace_info_event) +
865 min_sz)
866 return -EINVAL;
867
868 bts = zalloc(sizeof(struct intel_bts));
869 if (!bts)
870 return -ENOMEM;
871
872 err = auxtrace_queues__init(&bts->queues);
873 if (err)
874 goto err_free;
875
876 bts->session = session;
877 bts->machine = &session->machines.host; /* No kvm support */
878 bts->auxtrace_type = auxtrace_info->type;
879 bts->pmu_type = auxtrace_info->priv[INTEL_BTS_PMU_TYPE];
880 bts->tc.time_shift = auxtrace_info->priv[INTEL_BTS_TIME_SHIFT];
881 bts->tc.time_mult = auxtrace_info->priv[INTEL_BTS_TIME_MULT];
882 bts->tc.time_zero = auxtrace_info->priv[INTEL_BTS_TIME_ZERO];
883 bts->cap_user_time_zero =
884 auxtrace_info->priv[INTEL_BTS_CAP_USER_TIME_ZERO];
885 bts->snapshot_mode = auxtrace_info->priv[INTEL_BTS_SNAPSHOT_MODE];
886
887 bts->sampling_mode = false;
888
889 bts->auxtrace.process_event = intel_bts_process_event;
890 bts->auxtrace.process_auxtrace_event = intel_bts_process_auxtrace_event;
891 bts->auxtrace.flush_events = intel_bts_flush;
892 bts->auxtrace.free_events = intel_bts_free_events;
893 bts->auxtrace.free = intel_bts_free;
894 session->auxtrace = &bts->auxtrace;
895
896 intel_bts_print_info(&auxtrace_info->priv[0], INTEL_BTS_PMU_TYPE,
897 INTEL_BTS_SNAPSHOT_MODE);
898
899 if (dump_trace)
900 return 0;
901
902 if (session->itrace_synth_opts && session->itrace_synth_opts->set)
903 bts->synth_opts = *session->itrace_synth_opts;
904 else
905 itrace_synth_opts__set_default(&bts->synth_opts);
906
907 if (bts->synth_opts.calls)
908 bts->branches_filter |= PERF_IP_FLAG_CALL | PERF_IP_FLAG_ASYNC |
909 PERF_IP_FLAG_TRACE_END;
910 if (bts->synth_opts.returns)
911 bts->branches_filter |= PERF_IP_FLAG_RETURN |
912 PERF_IP_FLAG_TRACE_BEGIN;
913
914 err = intel_bts_synth_events(bts, session);
915 if (err)
916 goto err_free_queues;
917
918 err = auxtrace_queues__process_index(&bts->queues, session);
919 if (err)
920 goto err_free_queues;
921
922 if (bts->queues.populated)
923 bts->data_queued = true;
924
925 return 0;
926
927err_free_queues:
928 auxtrace_queues__free(&bts->queues);
929 session->auxtrace = NULL;
930err_free:
931 free(bts);
932 return err;
933}
generated by cgit v1.2.2 (git 2.25.0) at 2025-04-25 01:31:43 -0400