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2025cf9e | 1 | // SPDX-License-Identifier: GPL-2.0-only |
d0170af7 AH |
2 | /* |
3 | * intel-bts.c: Intel Processor Trace support | |
4 | * Copyright (c) 2013-2015, Intel Corporation. | |
d0170af7 AH |
5 | */ |
6 | ||
7 | #include <endian.h> | |
a43783ae | 8 | #include <errno.h> |
d0170af7 | 9 | #include <byteswap.h> |
fd20e811 | 10 | #include <inttypes.h> |
d0170af7 AH |
11 | #include <linux/kernel.h> |
12 | #include <linux/types.h> | |
13 | #include <linux/bitops.h> | |
14 | #include <linux/log2.h> | |
7f7c536f | 15 | #include <linux/zalloc.h> |
d0170af7 | 16 | |
d0170af7 AH |
17 | #include "color.h" |
18 | #include "evsel.h" | |
19 | #include "evlist.h" | |
20 | #include "machine.h" | |
daecf9e0 | 21 | #include "symbol.h" |
d0170af7 | 22 | #include "session.h" |
4a3cec84 | 23 | #include "tool.h" |
d0170af7 AH |
24 | #include "thread.h" |
25 | #include "thread-stack.h" | |
26 | #include "debug.h" | |
27 | #include "tsc.h" | |
28 | #include "auxtrace.h" | |
29 | #include "intel-pt-decoder/intel-pt-insn-decoder.h" | |
30 | #include "intel-bts.h" | |
ea49e01c | 31 | #include "util/synthetic-events.h" |
d0170af7 AH |
32 | |
33 | #define MAX_TIMESTAMP (~0ULL) | |
34 | ||
35 | #define INTEL_BTS_ERR_NOINSN 5 | |
36 | #define INTEL_BTS_ERR_LOST 9 | |
37 | ||
4e88118c | 38 | #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ |
d0170af7 AH |
39 | #define le64_to_cpu bswap_64 |
40 | #else | |
41 | #define le64_to_cpu | |
42 | #endif | |
43 | ||
44 | struct intel_bts { | |
45 | struct auxtrace auxtrace; | |
46 | struct auxtrace_queues queues; | |
47 | struct auxtrace_heap heap; | |
48 | u32 auxtrace_type; | |
49 | struct perf_session *session; | |
50 | struct machine *machine; | |
51 | bool sampling_mode; | |
52 | bool snapshot_mode; | |
53 | bool data_queued; | |
54 | u32 pmu_type; | |
55 | struct perf_tsc_conversion tc; | |
56 | bool cap_user_time_zero; | |
57 | struct itrace_synth_opts synth_opts; | |
58 | bool sample_branches; | |
59 | u32 branches_filter; | |
60 | u64 branches_sample_type; | |
61 | u64 branches_id; | |
62 | size_t branches_event_size; | |
d1706b39 | 63 | unsigned long num_events; |
d0170af7 AH |
64 | }; |
65 | ||
66 | struct intel_bts_queue { | |
67 | struct intel_bts *bts; | |
68 | unsigned int queue_nr; | |
69 | struct auxtrace_buffer *buffer; | |
70 | bool on_heap; | |
71 | bool done; | |
72 | pid_t pid; | |
73 | pid_t tid; | |
74 | int cpu; | |
75 | u64 time; | |
76 | struct intel_pt_insn intel_pt_insn; | |
77 | u32 sample_flags; | |
78 | }; | |
79 | ||
80 | struct branch { | |
81 | u64 from; | |
82 | u64 to; | |
83 | u64 misc; | |
84 | }; | |
85 | ||
86 | static void intel_bts_dump(struct intel_bts *bts __maybe_unused, | |
87 | unsigned char *buf, size_t len) | |
88 | { | |
89 | struct branch *branch; | |
90 | size_t i, pos = 0, br_sz = sizeof(struct branch), sz; | |
91 | const char *color = PERF_COLOR_BLUE; | |
92 | ||
93 | color_fprintf(stdout, color, | |
94 | ". ... Intel BTS data: size %zu bytes\n", | |
95 | len); | |
96 | ||
97 | while (len) { | |
98 | if (len >= br_sz) | |
99 | sz = br_sz; | |
100 | else | |
101 | sz = len; | |
102 | printf("."); | |
103 | color_fprintf(stdout, color, " %08x: ", pos); | |
104 | for (i = 0; i < sz; i++) | |
105 | color_fprintf(stdout, color, " %02x", buf[i]); | |
106 | for (; i < br_sz; i++) | |
107 | color_fprintf(stdout, color, " "); | |
108 | if (len >= br_sz) { | |
109 | branch = (struct branch *)buf; | |
110 | color_fprintf(stdout, color, " %"PRIx64" -> %"PRIx64" %s\n", | |
111 | le64_to_cpu(branch->from), | |
112 | le64_to_cpu(branch->to), | |
113 | le64_to_cpu(branch->misc) & 0x10 ? | |
114 | "pred" : "miss"); | |
115 | } else { | |
116 | color_fprintf(stdout, color, " Bad record!\n"); | |
117 | } | |
118 | pos += sz; | |
119 | buf += sz; | |
120 | len -= sz; | |
121 | } | |
122 | } | |
123 | ||
124 | static void intel_bts_dump_event(struct intel_bts *bts, unsigned char *buf, | |
125 | size_t len) | |
126 | { | |
127 | printf(".\n"); | |
128 | intel_bts_dump(bts, buf, len); | |
129 | } | |
130 | ||
131 | static int intel_bts_lost(struct intel_bts *bts, struct perf_sample *sample) | |
132 | { | |
133 | union perf_event event; | |
134 | int err; | |
135 | ||
136 | auxtrace_synth_error(&event.auxtrace_error, PERF_AUXTRACE_ERROR_ITRACE, | |
137 | INTEL_BTS_ERR_LOST, sample->cpu, sample->pid, | |
16bd4321 | 138 | sample->tid, 0, "Lost trace data", sample->time); |
d0170af7 AH |
139 | |
140 | err = perf_session__deliver_synth_event(bts->session, &event, NULL); | |
141 | if (err) | |
142 | pr_err("Intel BTS: failed to deliver error event, error %d\n", | |
143 | err); | |
144 | ||
145 | return err; | |
146 | } | |
147 | ||
148 | static struct intel_bts_queue *intel_bts_alloc_queue(struct intel_bts *bts, | |
149 | unsigned int queue_nr) | |
150 | { | |
151 | struct intel_bts_queue *btsq; | |
152 | ||
153 | btsq = zalloc(sizeof(struct intel_bts_queue)); | |
154 | if (!btsq) | |
155 | return NULL; | |
156 | ||
157 | btsq->bts = bts; | |
158 | btsq->queue_nr = queue_nr; | |
159 | btsq->pid = -1; | |
160 | btsq->tid = -1; | |
161 | btsq->cpu = -1; | |
162 | ||
163 | return btsq; | |
164 | } | |
165 | ||
166 | static int intel_bts_setup_queue(struct intel_bts *bts, | |
167 | struct auxtrace_queue *queue, | |
168 | unsigned int queue_nr) | |
169 | { | |
170 | struct intel_bts_queue *btsq = queue->priv; | |
171 | ||
172 | if (list_empty(&queue->head)) | |
173 | return 0; | |
174 | ||
175 | if (!btsq) { | |
176 | btsq = intel_bts_alloc_queue(bts, queue_nr); | |
177 | if (!btsq) | |
178 | return -ENOMEM; | |
179 | queue->priv = btsq; | |
180 | ||
181 | if (queue->cpu != -1) | |
182 | btsq->cpu = queue->cpu; | |
183 | btsq->tid = queue->tid; | |
184 | } | |
185 | ||
186 | if (bts->sampling_mode) | |
187 | return 0; | |
188 | ||
189 | if (!btsq->on_heap && !btsq->buffer) { | |
190 | int ret; | |
191 | ||
192 | btsq->buffer = auxtrace_buffer__next(queue, NULL); | |
193 | if (!btsq->buffer) | |
194 | return 0; | |
195 | ||
196 | ret = auxtrace_heap__add(&bts->heap, queue_nr, | |
197 | btsq->buffer->reference); | |
198 | if (ret) | |
199 | return ret; | |
200 | btsq->on_heap = true; | |
201 | } | |
202 | ||
203 | return 0; | |
204 | } | |
205 | ||
206 | static int intel_bts_setup_queues(struct intel_bts *bts) | |
207 | { | |
208 | unsigned int i; | |
209 | int ret; | |
210 | ||
211 | for (i = 0; i < bts->queues.nr_queues; i++) { | |
212 | ret = intel_bts_setup_queue(bts, &bts->queues.queue_array[i], | |
213 | i); | |
214 | if (ret) | |
215 | return ret; | |
216 | } | |
217 | return 0; | |
218 | } | |
219 | ||
220 | static inline int intel_bts_update_queues(struct intel_bts *bts) | |
221 | { | |
222 | if (bts->queues.new_data) { | |
223 | bts->queues.new_data = false; | |
224 | return intel_bts_setup_queues(bts); | |
225 | } | |
226 | return 0; | |
227 | } | |
228 | ||
229 | static unsigned char *intel_bts_find_overlap(unsigned char *buf_a, size_t len_a, | |
230 | unsigned char *buf_b, size_t len_b) | |
231 | { | |
232 | size_t offs, len; | |
233 | ||
234 | if (len_a > len_b) | |
235 | offs = len_a - len_b; | |
236 | else | |
237 | offs = 0; | |
238 | ||
239 | for (; offs < len_a; offs += sizeof(struct branch)) { | |
240 | len = len_a - offs; | |
241 | if (!memcmp(buf_a + offs, buf_b, len)) | |
242 | return buf_b + len; | |
243 | } | |
244 | ||
245 | return buf_b; | |
246 | } | |
247 | ||
248 | static int intel_bts_do_fix_overlap(struct auxtrace_queue *queue, | |
249 | struct auxtrace_buffer *b) | |
250 | { | |
251 | struct auxtrace_buffer *a; | |
252 | void *start; | |
253 | ||
254 | if (b->list.prev == &queue->head) | |
255 | return 0; | |
256 | a = list_entry(b->list.prev, struct auxtrace_buffer, list); | |
257 | start = intel_bts_find_overlap(a->data, a->size, b->data, b->size); | |
258 | if (!start) | |
259 | return -EINVAL; | |
260 | b->use_size = b->data + b->size - start; | |
261 | b->use_data = start; | |
262 | return 0; | |
263 | } | |
264 | ||
5d4f0eda AH |
265 | static inline u8 intel_bts_cpumode(struct intel_bts *bts, uint64_t ip) |
266 | { | |
267 | return machine__kernel_ip(bts->machine, ip) ? | |
268 | PERF_RECORD_MISC_KERNEL : | |
269 | PERF_RECORD_MISC_USER; | |
270 | } | |
271 | ||
d0170af7 AH |
272 | static int intel_bts_synth_branch_sample(struct intel_bts_queue *btsq, |
273 | struct branch *branch) | |
274 | { | |
275 | int ret; | |
276 | struct intel_bts *bts = btsq->bts; | |
277 | union perf_event event; | |
278 | struct perf_sample sample = { .ip = 0, }; | |
279 | ||
d1706b39 AK |
280 | if (bts->synth_opts.initial_skip && |
281 | bts->num_events++ <= bts->synth_opts.initial_skip) | |
282 | return 0; | |
283 | ||
d0170af7 | 284 | sample.ip = le64_to_cpu(branch->from); |
5d4f0eda | 285 | sample.cpumode = intel_bts_cpumode(bts, sample.ip); |
d0170af7 AH |
286 | sample.pid = btsq->pid; |
287 | sample.tid = btsq->tid; | |
288 | sample.addr = le64_to_cpu(branch->to); | |
289 | sample.id = btsq->bts->branches_id; | |
290 | sample.stream_id = btsq->bts->branches_id; | |
291 | sample.period = 1; | |
292 | sample.cpu = btsq->cpu; | |
293 | sample.flags = btsq->sample_flags; | |
294 | sample.insn_len = btsq->intel_pt_insn.length; | |
faaa8768 | 295 | memcpy(sample.insn, btsq->intel_pt_insn.buf, INTEL_PT_INSN_BUF_SZ); |
d0170af7 | 296 | |
5d4f0eda AH |
297 | event.sample.header.type = PERF_RECORD_SAMPLE; |
298 | event.sample.header.misc = sample.cpumode; | |
299 | event.sample.header.size = sizeof(struct perf_event_header); | |
300 | ||
d0170af7 AH |
301 | if (bts->synth_opts.inject) { |
302 | event.sample.header.size = bts->branches_event_size; | |
303 | ret = perf_event__synthesize_sample(&event, | |
304 | bts->branches_sample_type, | |
936f1f30 | 305 | 0, &sample); |
d0170af7 AH |
306 | if (ret) |
307 | return ret; | |
308 | } | |
309 | ||
310 | ret = perf_session__deliver_synth_event(bts->session, &event, &sample); | |
311 | if (ret) | |
312 | pr_err("Intel BTS: failed to deliver branch event, error %d\n", | |
313 | ret); | |
314 | ||
315 | return ret; | |
316 | } | |
317 | ||
318 | static int intel_bts_get_next_insn(struct intel_bts_queue *btsq, u64 ip) | |
319 | { | |
320 | struct machine *machine = btsq->bts->machine; | |
321 | struct thread *thread; | |
32f98aab | 322 | unsigned char buf[INTEL_PT_INSN_BUF_SZ]; |
d0170af7 | 323 | ssize_t len; |
15325938 | 324 | bool x86_64; |
d0170af7 AH |
325 | int err = -1; |
326 | ||
d0170af7 AH |
327 | thread = machine__find_thread(machine, -1, btsq->tid); |
328 | if (!thread) | |
329 | return -1; | |
330 | ||
15325938 | 331 | len = thread__memcpy(thread, machine, buf, ip, INTEL_PT_INSN_BUF_SZ, &x86_64); |
d0170af7 AH |
332 | if (len <= 0) |
333 | goto out_put; | |
334 | ||
d0170af7 AH |
335 | if (intel_pt_get_insn(buf, len, x86_64, &btsq->intel_pt_insn)) |
336 | goto out_put; | |
337 | ||
338 | err = 0; | |
339 | out_put: | |
340 | thread__put(thread); | |
341 | return err; | |
342 | } | |
343 | ||
344 | static int intel_bts_synth_error(struct intel_bts *bts, int cpu, pid_t pid, | |
345 | pid_t tid, u64 ip) | |
346 | { | |
347 | union perf_event event; | |
348 | int err; | |
349 | ||
350 | auxtrace_synth_error(&event.auxtrace_error, PERF_AUXTRACE_ERROR_ITRACE, | |
351 | INTEL_BTS_ERR_NOINSN, cpu, pid, tid, ip, | |
16bd4321 | 352 | "Failed to get instruction", 0); |
d0170af7 AH |
353 | |
354 | err = perf_session__deliver_synth_event(bts->session, &event, NULL); | |
355 | if (err) | |
356 | pr_err("Intel BTS: failed to deliver error event, error %d\n", | |
357 | err); | |
358 | ||
359 | return err; | |
360 | } | |
361 | ||
362 | static int intel_bts_get_branch_type(struct intel_bts_queue *btsq, | |
363 | struct branch *branch) | |
364 | { | |
365 | int err; | |
366 | ||
367 | if (!branch->from) { | |
368 | if (branch->to) | |
369 | btsq->sample_flags = PERF_IP_FLAG_BRANCH | | |
370 | PERF_IP_FLAG_TRACE_BEGIN; | |
371 | else | |
372 | btsq->sample_flags = 0; | |
373 | btsq->intel_pt_insn.length = 0; | |
374 | } else if (!branch->to) { | |
375 | btsq->sample_flags = PERF_IP_FLAG_BRANCH | | |
376 | PERF_IP_FLAG_TRACE_END; | |
377 | btsq->intel_pt_insn.length = 0; | |
378 | } else { | |
379 | err = intel_bts_get_next_insn(btsq, branch->from); | |
380 | if (err) { | |
381 | btsq->sample_flags = 0; | |
382 | btsq->intel_pt_insn.length = 0; | |
383 | if (!btsq->bts->synth_opts.errors) | |
384 | return 0; | |
385 | err = intel_bts_synth_error(btsq->bts, btsq->cpu, | |
386 | btsq->pid, btsq->tid, | |
387 | branch->from); | |
388 | return err; | |
389 | } | |
390 | btsq->sample_flags = intel_pt_insn_type(btsq->intel_pt_insn.op); | |
391 | /* Check for an async branch into the kernel */ | |
392 | if (!machine__kernel_ip(btsq->bts->machine, branch->from) && | |
393 | machine__kernel_ip(btsq->bts->machine, branch->to) && | |
394 | btsq->sample_flags != (PERF_IP_FLAG_BRANCH | | |
395 | PERF_IP_FLAG_CALL | | |
396 | PERF_IP_FLAG_SYSCALLRET)) | |
397 | btsq->sample_flags = PERF_IP_FLAG_BRANCH | | |
398 | PERF_IP_FLAG_CALL | | |
399 | PERF_IP_FLAG_ASYNC | | |
400 | PERF_IP_FLAG_INTERRUPT; | |
401 | } | |
402 | ||
403 | return 0; | |
404 | } | |
405 | ||
406 | static int intel_bts_process_buffer(struct intel_bts_queue *btsq, | |
50f73637 AH |
407 | struct auxtrace_buffer *buffer, |
408 | struct thread *thread) | |
d0170af7 AH |
409 | { |
410 | struct branch *branch; | |
411 | size_t sz, bsz = sizeof(struct branch); | |
412 | u32 filter = btsq->bts->branches_filter; | |
413 | int err = 0; | |
414 | ||
415 | if (buffer->use_data) { | |
416 | sz = buffer->use_size; | |
417 | branch = buffer->use_data; | |
418 | } else { | |
419 | sz = buffer->size; | |
420 | branch = buffer->data; | |
421 | } | |
422 | ||
423 | if (!btsq->bts->sample_branches) | |
424 | return 0; | |
425 | ||
426 | for (; sz > bsz; branch += 1, sz -= bsz) { | |
427 | if (!branch->from && !branch->to) | |
428 | continue; | |
429 | intel_bts_get_branch_type(btsq, branch); | |
50f73637 | 430 | if (btsq->bts->synth_opts.thread_stack) |
256d92bc | 431 | thread_stack__event(thread, btsq->cpu, btsq->sample_flags, |
50f73637 AH |
432 | le64_to_cpu(branch->from), |
433 | le64_to_cpu(branch->to), | |
434 | btsq->intel_pt_insn.length, | |
86d67180 | 435 | buffer->buffer_nr + 1, true, 0, 0); |
d0170af7 AH |
436 | if (filter && !(filter & btsq->sample_flags)) |
437 | continue; | |
438 | err = intel_bts_synth_branch_sample(btsq, branch); | |
439 | if (err) | |
440 | break; | |
441 | } | |
442 | return err; | |
443 | } | |
444 | ||
445 | static int intel_bts_process_queue(struct intel_bts_queue *btsq, u64 *timestamp) | |
446 | { | |
447 | struct auxtrace_buffer *buffer = btsq->buffer, *old_buffer = buffer; | |
448 | struct auxtrace_queue *queue; | |
449 | struct thread *thread; | |
450 | int err; | |
451 | ||
452 | if (btsq->done) | |
453 | return 1; | |
454 | ||
455 | if (btsq->pid == -1) { | |
456 | thread = machine__find_thread(btsq->bts->machine, -1, | |
457 | btsq->tid); | |
458 | if (thread) | |
ee84a303 | 459 | btsq->pid = thread__pid(thread); |
d0170af7 AH |
460 | } else { |
461 | thread = machine__findnew_thread(btsq->bts->machine, btsq->pid, | |
462 | btsq->tid); | |
463 | } | |
464 | ||
465 | queue = &btsq->bts->queues.queue_array[btsq->queue_nr]; | |
466 | ||
467 | if (!buffer) | |
468 | buffer = auxtrace_buffer__next(queue, NULL); | |
469 | ||
470 | if (!buffer) { | |
471 | if (!btsq->bts->sampling_mode) | |
472 | btsq->done = 1; | |
473 | err = 1; | |
474 | goto out_put; | |
475 | } | |
476 | ||
477 | /* Currently there is no support for split buffers */ | |
478 | if (buffer->consecutive) { | |
479 | err = -EINVAL; | |
480 | goto out_put; | |
481 | } | |
482 | ||
483 | if (!buffer->data) { | |
8ceb41d7 | 484 | int fd = perf_data__fd(btsq->bts->session->data); |
d0170af7 AH |
485 | |
486 | buffer->data = auxtrace_buffer__get_data(buffer, fd); | |
487 | if (!buffer->data) { | |
488 | err = -ENOMEM; | |
489 | goto out_put; | |
490 | } | |
491 | } | |
492 | ||
493 | if (btsq->bts->snapshot_mode && !buffer->consecutive && | |
494 | intel_bts_do_fix_overlap(queue, buffer)) { | |
495 | err = -ENOMEM; | |
496 | goto out_put; | |
497 | } | |
498 | ||
50f73637 AH |
499 | if (!btsq->bts->synth_opts.callchain && |
500 | !btsq->bts->synth_opts.thread_stack && thread && | |
d0170af7 AH |
501 | (!old_buffer || btsq->bts->sampling_mode || |
502 | (btsq->bts->snapshot_mode && !buffer->consecutive))) | |
256d92bc | 503 | thread_stack__set_trace_nr(thread, btsq->cpu, buffer->buffer_nr + 1); |
d0170af7 | 504 | |
50f73637 | 505 | err = intel_bts_process_buffer(btsq, buffer, thread); |
d0170af7 AH |
506 | |
507 | auxtrace_buffer__drop_data(buffer); | |
508 | ||
509 | btsq->buffer = auxtrace_buffer__next(queue, buffer); | |
510 | if (btsq->buffer) { | |
511 | if (timestamp) | |
512 | *timestamp = btsq->buffer->reference; | |
513 | } else { | |
514 | if (!btsq->bts->sampling_mode) | |
515 | btsq->done = 1; | |
516 | } | |
517 | out_put: | |
518 | thread__put(thread); | |
519 | return err; | |
520 | } | |
521 | ||
522 | static int intel_bts_flush_queue(struct intel_bts_queue *btsq) | |
523 | { | |
524 | u64 ts = 0; | |
525 | int ret; | |
526 | ||
527 | while (1) { | |
528 | ret = intel_bts_process_queue(btsq, &ts); | |
529 | if (ret < 0) | |
530 | return ret; | |
531 | if (ret) | |
532 | break; | |
533 | } | |
534 | return 0; | |
535 | } | |
536 | ||
537 | static int intel_bts_process_tid_exit(struct intel_bts *bts, pid_t tid) | |
538 | { | |
539 | struct auxtrace_queues *queues = &bts->queues; | |
540 | unsigned int i; | |
541 | ||
542 | for (i = 0; i < queues->nr_queues; i++) { | |
543 | struct auxtrace_queue *queue = &bts->queues.queue_array[i]; | |
544 | struct intel_bts_queue *btsq = queue->priv; | |
545 | ||
546 | if (btsq && btsq->tid == tid) | |
547 | return intel_bts_flush_queue(btsq); | |
548 | } | |
549 | return 0; | |
550 | } | |
551 | ||
552 | static int intel_bts_process_queues(struct intel_bts *bts, u64 timestamp) | |
553 | { | |
554 | while (1) { | |
555 | unsigned int queue_nr; | |
556 | struct auxtrace_queue *queue; | |
557 | struct intel_bts_queue *btsq; | |
558 | u64 ts = 0; | |
559 | int ret; | |
560 | ||
561 | if (!bts->heap.heap_cnt) | |
562 | return 0; | |
563 | ||
564 | if (bts->heap.heap_array[0].ordinal > timestamp) | |
565 | return 0; | |
566 | ||
567 | queue_nr = bts->heap.heap_array[0].queue_nr; | |
568 | queue = &bts->queues.queue_array[queue_nr]; | |
569 | btsq = queue->priv; | |
570 | ||
571 | auxtrace_heap__pop(&bts->heap); | |
572 | ||
573 | ret = intel_bts_process_queue(btsq, &ts); | |
574 | if (ret < 0) { | |
575 | auxtrace_heap__add(&bts->heap, queue_nr, ts); | |
576 | return ret; | |
577 | } | |
578 | ||
579 | if (!ret) { | |
580 | ret = auxtrace_heap__add(&bts->heap, queue_nr, ts); | |
581 | if (ret < 0) | |
582 | return ret; | |
583 | } else { | |
584 | btsq->on_heap = false; | |
585 | } | |
586 | } | |
587 | ||
588 | return 0; | |
589 | } | |
590 | ||
591 | static int intel_bts_process_event(struct perf_session *session, | |
592 | union perf_event *event, | |
593 | struct perf_sample *sample, | |
594 | struct perf_tool *tool) | |
595 | { | |
596 | struct intel_bts *bts = container_of(session->auxtrace, struct intel_bts, | |
597 | auxtrace); | |
598 | u64 timestamp; | |
599 | int err; | |
600 | ||
601 | if (dump_trace) | |
602 | return 0; | |
603 | ||
604 | if (!tool->ordered_events) { | |
605 | pr_err("Intel BTS requires ordered events\n"); | |
606 | return -EINVAL; | |
607 | } | |
608 | ||
609 | if (sample->time && sample->time != (u64)-1) | |
610 | timestamp = perf_time_to_tsc(sample->time, &bts->tc); | |
611 | else | |
612 | timestamp = 0; | |
613 | ||
614 | err = intel_bts_update_queues(bts); | |
615 | if (err) | |
616 | return err; | |
617 | ||
618 | err = intel_bts_process_queues(bts, timestamp); | |
619 | if (err) | |
620 | return err; | |
621 | if (event->header.type == PERF_RECORD_EXIT) { | |
53ff6bc3 | 622 | err = intel_bts_process_tid_exit(bts, event->fork.tid); |
d0170af7 AH |
623 | if (err) |
624 | return err; | |
625 | } | |
626 | ||
627 | if (event->header.type == PERF_RECORD_AUX && | |
628 | (event->aux.flags & PERF_AUX_FLAG_TRUNCATED) && | |
629 | bts->synth_opts.errors) | |
630 | err = intel_bts_lost(bts, sample); | |
631 | ||
632 | return err; | |
633 | } | |
634 | ||
635 | static int intel_bts_process_auxtrace_event(struct perf_session *session, | |
636 | union perf_event *event, | |
637 | struct perf_tool *tool __maybe_unused) | |
638 | { | |
639 | struct intel_bts *bts = container_of(session->auxtrace, struct intel_bts, | |
640 | auxtrace); | |
641 | ||
642 | if (bts->sampling_mode) | |
643 | return 0; | |
644 | ||
645 | if (!bts->data_queued) { | |
646 | struct auxtrace_buffer *buffer; | |
647 | off_t data_offset; | |
8ceb41d7 | 648 | int fd = perf_data__fd(session->data); |
d0170af7 AH |
649 | int err; |
650 | ||
8ceb41d7 | 651 | if (perf_data__is_pipe(session->data)) { |
d0170af7 AH |
652 | data_offset = 0; |
653 | } else { | |
654 | data_offset = lseek(fd, 0, SEEK_CUR); | |
655 | if (data_offset == -1) | |
656 | return -errno; | |
657 | } | |
658 | ||
659 | err = auxtrace_queues__add_event(&bts->queues, session, event, | |
660 | data_offset, &buffer); | |
661 | if (err) | |
662 | return err; | |
663 | ||
664 | /* Dump here now we have copied a piped trace out of the pipe */ | |
665 | if (dump_trace) { | |
666 | if (auxtrace_buffer__get_data(buffer, fd)) { | |
667 | intel_bts_dump_event(bts, buffer->data, | |
668 | buffer->size); | |
669 | auxtrace_buffer__put_data(buffer); | |
670 | } | |
671 | } | |
672 | } | |
673 | ||
674 | return 0; | |
675 | } | |
676 | ||
b8f8eb84 | 677 | static int intel_bts_flush(struct perf_session *session, |
d0170af7 AH |
678 | struct perf_tool *tool __maybe_unused) |
679 | { | |
680 | struct intel_bts *bts = container_of(session->auxtrace, struct intel_bts, | |
681 | auxtrace); | |
682 | int ret; | |
683 | ||
684 | if (dump_trace || bts->sampling_mode) | |
685 | return 0; | |
686 | ||
687 | if (!tool->ordered_events) | |
688 | return -EINVAL; | |
689 | ||
690 | ret = intel_bts_update_queues(bts); | |
691 | if (ret < 0) | |
692 | return ret; | |
693 | ||
694 | return intel_bts_process_queues(bts, MAX_TIMESTAMP); | |
695 | } | |
696 | ||
697 | static void intel_bts_free_queue(void *priv) | |
698 | { | |
699 | struct intel_bts_queue *btsq = priv; | |
700 | ||
701 | if (!btsq) | |
702 | return; | |
703 | free(btsq); | |
704 | } | |
705 | ||
706 | static void intel_bts_free_events(struct perf_session *session) | |
707 | { | |
708 | struct intel_bts *bts = container_of(session->auxtrace, struct intel_bts, | |
709 | auxtrace); | |
710 | struct auxtrace_queues *queues = &bts->queues; | |
711 | unsigned int i; | |
712 | ||
713 | for (i = 0; i < queues->nr_queues; i++) { | |
714 | intel_bts_free_queue(queues->queue_array[i].priv); | |
715 | queues->queue_array[i].priv = NULL; | |
716 | } | |
717 | auxtrace_queues__free(queues); | |
718 | } | |
719 | ||
720 | static void intel_bts_free(struct perf_session *session) | |
721 | { | |
722 | struct intel_bts *bts = container_of(session->auxtrace, struct intel_bts, | |
723 | auxtrace); | |
724 | ||
725 | auxtrace_heap__free(&bts->heap); | |
726 | intel_bts_free_events(session); | |
727 | session->auxtrace = NULL; | |
728 | free(bts); | |
729 | } | |
730 | ||
966246f5 AH |
731 | static bool intel_bts_evsel_is_auxtrace(struct perf_session *session, |
732 | struct evsel *evsel) | |
733 | { | |
734 | struct intel_bts *bts = container_of(session->auxtrace, struct intel_bts, | |
735 | auxtrace); | |
736 | ||
737 | return evsel->core.attr.type == bts->pmu_type; | |
738 | } | |
739 | ||
d0170af7 AH |
740 | struct intel_bts_synth { |
741 | struct perf_tool dummy_tool; | |
742 | struct perf_session *session; | |
743 | }; | |
744 | ||
745 | static int intel_bts_event_synth(struct perf_tool *tool, | |
746 | union perf_event *event, | |
747 | struct perf_sample *sample __maybe_unused, | |
748 | struct machine *machine __maybe_unused) | |
749 | { | |
750 | struct intel_bts_synth *intel_bts_synth = | |
751 | container_of(tool, struct intel_bts_synth, dummy_tool); | |
752 | ||
753 | return perf_session__deliver_synth_event(intel_bts_synth->session, | |
754 | event, NULL); | |
755 | } | |
756 | ||
757 | static int intel_bts_synth_event(struct perf_session *session, | |
758 | struct perf_event_attr *attr, u64 id) | |
759 | { | |
760 | struct intel_bts_synth intel_bts_synth; | |
761 | ||
762 | memset(&intel_bts_synth, 0, sizeof(struct intel_bts_synth)); | |
763 | intel_bts_synth.session = session; | |
764 | ||
765 | return perf_event__synthesize_attr(&intel_bts_synth.dummy_tool, attr, 1, | |
766 | &id, intel_bts_event_synth); | |
767 | } | |
768 | ||
769 | static int intel_bts_synth_events(struct intel_bts *bts, | |
770 | struct perf_session *session) | |
771 | { | |
63503dba | 772 | struct evlist *evlist = session->evlist; |
32dcd021 | 773 | struct evsel *evsel; |
d0170af7 AH |
774 | struct perf_event_attr attr; |
775 | bool found = false; | |
776 | u64 id; | |
777 | int err; | |
778 | ||
e5cadb93 | 779 | evlist__for_each_entry(evlist, evsel) { |
e7eb9002 | 780 | if (evsel->core.attr.type == bts->pmu_type && evsel->core.ids) { |
d0170af7 AH |
781 | found = true; |
782 | break; | |
783 | } | |
784 | } | |
785 | ||
786 | if (!found) { | |
787 | pr_debug("There are no selected events with Intel BTS data\n"); | |
788 | return 0; | |
789 | } | |
790 | ||
791 | memset(&attr, 0, sizeof(struct perf_event_attr)); | |
792 | attr.size = sizeof(struct perf_event_attr); | |
793 | attr.type = PERF_TYPE_HARDWARE; | |
1fc632ce | 794 | attr.sample_type = evsel->core.attr.sample_type & PERF_SAMPLE_MASK; |
d0170af7 AH |
795 | attr.sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID | |
796 | PERF_SAMPLE_PERIOD; | |
797 | attr.sample_type &= ~(u64)PERF_SAMPLE_TIME; | |
798 | attr.sample_type &= ~(u64)PERF_SAMPLE_CPU; | |
1fc632ce JO |
799 | attr.exclude_user = evsel->core.attr.exclude_user; |
800 | attr.exclude_kernel = evsel->core.attr.exclude_kernel; | |
801 | attr.exclude_hv = evsel->core.attr.exclude_hv; | |
802 | attr.exclude_host = evsel->core.attr.exclude_host; | |
803 | attr.exclude_guest = evsel->core.attr.exclude_guest; | |
804 | attr.sample_id_all = evsel->core.attr.sample_id_all; | |
805 | attr.read_format = evsel->core.attr.read_format; | |
d0170af7 | 806 | |
deaf3219 | 807 | id = evsel->core.id[0] + 1000000000; |
d0170af7 AH |
808 | if (!id) |
809 | id = 1; | |
810 | ||
811 | if (bts->synth_opts.branches) { | |
812 | attr.config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS; | |
813 | attr.sample_period = 1; | |
814 | attr.sample_type |= PERF_SAMPLE_ADDR; | |
815 | pr_debug("Synthesizing 'branches' event with id %" PRIu64 " sample type %#" PRIx64 "\n", | |
816 | id, (u64)attr.sample_type); | |
817 | err = intel_bts_synth_event(session, &attr, id); | |
818 | if (err) { | |
819 | pr_err("%s: failed to synthesize 'branches' event type\n", | |
820 | __func__); | |
821 | return err; | |
822 | } | |
823 | bts->sample_branches = true; | |
824 | bts->branches_sample_type = attr.sample_type; | |
825 | bts->branches_id = id; | |
826 | /* | |
827 | * We only use sample types from PERF_SAMPLE_MASK so we can use | |
2aaefde4 | 828 | * __evsel__sample_size() here. |
d0170af7 | 829 | */ |
69d81f09 | 830 | bts->branches_event_size = sizeof(struct perf_record_sample) + |
2aaefde4 | 831 | __evsel__sample_size(attr.sample_type); |
d0170af7 AH |
832 | } |
833 | ||
d0170af7 AH |
834 | return 0; |
835 | } | |
836 | ||
837 | static const char * const intel_bts_info_fmts[] = { | |
838 | [INTEL_BTS_PMU_TYPE] = " PMU Type %"PRId64"\n", | |
839 | [INTEL_BTS_TIME_SHIFT] = " Time Shift %"PRIu64"\n", | |
840 | [INTEL_BTS_TIME_MULT] = " Time Muliplier %"PRIu64"\n", | |
841 | [INTEL_BTS_TIME_ZERO] = " Time Zero %"PRIu64"\n", | |
842 | [INTEL_BTS_CAP_USER_TIME_ZERO] = " Cap Time Zero %"PRId64"\n", | |
843 | [INTEL_BTS_SNAPSHOT_MODE] = " Snapshot mode %"PRId64"\n", | |
844 | }; | |
845 | ||
9a8dad04 | 846 | static void intel_bts_print_info(__u64 *arr, int start, int finish) |
d0170af7 AH |
847 | { |
848 | int i; | |
849 | ||
850 | if (!dump_trace) | |
851 | return; | |
852 | ||
853 | for (i = start; i <= finish; i++) | |
854 | fprintf(stdout, intel_bts_info_fmts[i], arr[i]); | |
855 | } | |
856 | ||
d0170af7 AH |
857 | int intel_bts_process_auxtrace_info(union perf_event *event, |
858 | struct perf_session *session) | |
859 | { | |
72932371 | 860 | struct perf_record_auxtrace_info *auxtrace_info = &event->auxtrace_info; |
d0170af7 AH |
861 | size_t min_sz = sizeof(u64) * INTEL_BTS_SNAPSHOT_MODE; |
862 | struct intel_bts *bts; | |
863 | int err; | |
864 | ||
72932371 | 865 | if (auxtrace_info->header.size < sizeof(struct perf_record_auxtrace_info) + |
d0170af7 AH |
866 | min_sz) |
867 | return -EINVAL; | |
868 | ||
869 | bts = zalloc(sizeof(struct intel_bts)); | |
870 | if (!bts) | |
871 | return -ENOMEM; | |
872 | ||
873 | err = auxtrace_queues__init(&bts->queues); | |
874 | if (err) | |
875 | goto err_free; | |
876 | ||
877 | bts->session = session; | |
878 | bts->machine = &session->machines.host; /* No kvm support */ | |
879 | bts->auxtrace_type = auxtrace_info->type; | |
880 | bts->pmu_type = auxtrace_info->priv[INTEL_BTS_PMU_TYPE]; | |
881 | bts->tc.time_shift = auxtrace_info->priv[INTEL_BTS_TIME_SHIFT]; | |
882 | bts->tc.time_mult = auxtrace_info->priv[INTEL_BTS_TIME_MULT]; | |
883 | bts->tc.time_zero = auxtrace_info->priv[INTEL_BTS_TIME_ZERO]; | |
884 | bts->cap_user_time_zero = | |
885 | auxtrace_info->priv[INTEL_BTS_CAP_USER_TIME_ZERO]; | |
886 | bts->snapshot_mode = auxtrace_info->priv[INTEL_BTS_SNAPSHOT_MODE]; | |
887 | ||
888 | bts->sampling_mode = false; | |
889 | ||
890 | bts->auxtrace.process_event = intel_bts_process_event; | |
891 | bts->auxtrace.process_auxtrace_event = intel_bts_process_auxtrace_event; | |
892 | bts->auxtrace.flush_events = intel_bts_flush; | |
893 | bts->auxtrace.free_events = intel_bts_free_events; | |
894 | bts->auxtrace.free = intel_bts_free; | |
966246f5 | 895 | bts->auxtrace.evsel_is_auxtrace = intel_bts_evsel_is_auxtrace; |
d0170af7 AH |
896 | session->auxtrace = &bts->auxtrace; |
897 | ||
898 | intel_bts_print_info(&auxtrace_info->priv[0], INTEL_BTS_PMU_TYPE, | |
899 | INTEL_BTS_SNAPSHOT_MODE); | |
900 | ||
901 | if (dump_trace) | |
902 | return 0; | |
903 | ||
1d481458 | 904 | if (session->itrace_synth_opts->set) { |
d0170af7 | 905 | bts->synth_opts = *session->itrace_synth_opts; |
50f73637 | 906 | } else { |
4eb06815 AK |
907 | itrace_synth_opts__set_default(&bts->synth_opts, |
908 | session->itrace_synth_opts->default_no_sample); | |
1d481458 | 909 | bts->synth_opts.thread_stack = |
50f73637 AH |
910 | session->itrace_synth_opts->thread_stack; |
911 | } | |
d0170af7 AH |
912 | |
913 | if (bts->synth_opts.calls) | |
914 | bts->branches_filter |= PERF_IP_FLAG_CALL | PERF_IP_FLAG_ASYNC | | |
915 | PERF_IP_FLAG_TRACE_END; | |
916 | if (bts->synth_opts.returns) | |
917 | bts->branches_filter |= PERF_IP_FLAG_RETURN | | |
918 | PERF_IP_FLAG_TRACE_BEGIN; | |
919 | ||
920 | err = intel_bts_synth_events(bts, session); | |
921 | if (err) | |
922 | goto err_free_queues; | |
923 | ||
924 | err = auxtrace_queues__process_index(&bts->queues, session); | |
925 | if (err) | |
926 | goto err_free_queues; | |
927 | ||
928 | if (bts->queues.populated) | |
929 | bts->data_queued = true; | |
930 | ||
931 | return 0; | |
932 | ||
933 | err_free_queues: | |
934 | auxtrace_queues__free(&bts->queues); | |
935 | session->auxtrace = NULL; | |
936 | err_free: | |
937 | free(bts); | |
938 | return err; | |
939 | } |