tools/perf/util/intel-pt.c

   1 /*
   2  * intel_pt.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 <inttypes.h>
  17 #include <stdio.h>
  18 #include <stdbool.h>
  19 #include <errno.h>
  20 #include <linux/kernel.h>
  21 #include <linux/types.h>
  22
  23 #include "../perf.h"
  24 #include "session.h"
  25 #include "machine.h"
  26 #include "memswap.h"
  27 #include "sort.h"
  28 #include "tool.h"
  29 #include "event.h"
  30 #include "evlist.h"
  31 #include "evsel.h"
  32 #include "map.h"
  33 #include "color.h"
  34 #include "util.h"
  35 #include "thread.h"
  36 #include "thread-stack.h"
  37 #include "symbol.h"
  38 #include "callchain.h"
  39 #include "dso.h"
  40 #include "debug.h"
  41 #include "auxtrace.h"
  42 #include "tsc.h"
  43 #include "intel-pt.h"
  44 #include "config.h"
  45
  46 #include "intel-pt-decoder/intel-pt-log.h"
  47 #include "intel-pt-decoder/intel-pt-decoder.h"
  48 #include "intel-pt-decoder/intel-pt-insn-decoder.h"
  49 #include "intel-pt-decoder/intel-pt-pkt-decoder.h"
  50
  51 #define MAX_TIMESTAMP (~0ULL)
  52
  53 struct intel_pt {
  54         struct auxtrace auxtrace;
  55         struct auxtrace_queues queues;
  56         struct auxtrace_heap heap;
  57         u32 auxtrace_type;
  58         struct perf_session *session;
  59         struct machine *machine;
  60         struct perf_evsel *switch_evsel;
  61         struct thread *unknown_thread;
  62         bool timeless_decoding;
  63         bool sampling_mode;
  64         bool snapshot_mode;
  65         bool per_cpu_mmaps;
  66         bool have_tsc;
  67         bool data_queued;
  68         bool est_tsc;
  69         bool sync_switch;
  70         bool mispred_all;
  71         int have_sched_switch;
  72         u32 pmu_type;
  73         u64 kernel_start;
  74         u64 switch_ip;
  75         u64 ptss_ip;
  76
  77         struct perf_tsc_conversion tc;
  78         bool cap_user_time_zero;
  79
  80         struct itrace_synth_opts synth_opts;
  81
  82         bool sample_instructions;
  83         u64 instructions_sample_type;
  84         u64 instructions_id;
  85
  86         bool sample_branches;
  87         u32 branches_filter;
  88         u64 branches_sample_type;
  89         u64 branches_id;
  90
  91         bool sample_transactions;
  92         u64 transactions_sample_type;
  93         u64 transactions_id;
  94
  95         bool sample_ptwrites;
  96         u64 ptwrites_sample_type;
  97         u64 ptwrites_id;
  98
  99         bool sample_pwr_events;
 100         u64 pwr_events_sample_type;
 101         u64 mwait_id;
 102         u64 pwre_id;
 103         u64 exstop_id;
 104         u64 pwrx_id;
 105         u64 cbr_id;
 106
 107         u64 tsc_bit;
 108         u64 mtc_bit;
 109         u64 mtc_freq_bits;
 110         u32 tsc_ctc_ratio_n;
 111         u32 tsc_ctc_ratio_d;
 112         u64 cyc_bit;
 113         u64 noretcomp_bit;
 114         unsigned max_non_turbo_ratio;
 115         unsigned cbr2khz;
 116
 117         unsigned long num_events;
 118
 119         char *filter;
 120         struct addr_filters filts;
 121 };
 122
 123 enum switch_state {
 124         INTEL_PT_SS_NOT_TRACING,
 125         INTEL_PT_SS_UNKNOWN,
 126         INTEL_PT_SS_TRACING,
 127         INTEL_PT_SS_EXPECTING_SWITCH_EVENT,
 128         INTEL_PT_SS_EXPECTING_SWITCH_IP,
 129 };
 130
 131 struct intel_pt_queue {
 132         struct intel_pt *pt;
 133         unsigned int queue_nr;
 134         struct auxtrace_buffer *buffer;
 135         struct auxtrace_buffer *old_buffer;
 136         void *decoder;
 137         const struct intel_pt_state *state;
 138         struct ip_callchain *chain;
 139         struct branch_stack *last_branch;
 140         struct branch_stack *last_branch_rb;
 141         size_t last_branch_pos;
 142         union perf_event *event_buf;
 143         bool on_heap;
 144         bool stop;
 145         bool step_through_buffers;
 146         bool use_buffer_pid_tid;
 147         bool sync_switch;
 148         pid_t pid, tid;
 149         int cpu;
 150         int switch_state;
 151         pid_t next_tid;
 152         struct thread *thread;
 153         bool exclude_kernel;
 154         bool have_sample;
 155         u64 time;
 156         u64 timestamp;
 157         u32 flags;
 158         u16 insn_len;
 159         u64 last_insn_cnt;
 160         char insn[INTEL_PT_INSN_BUF_SZ];
 161 };
 162
 163 static void intel_pt_dump(struct intel_pt *pt __maybe_unused,
 164                           unsigned char *buf, size_t len)
 165 {
 166         struct intel_pt_pkt packet;
 167         size_t pos = 0;
 168         int ret, pkt_len, i;
 169         char desc[INTEL_PT_PKT_DESC_MAX];
 170         const char *color = PERF_COLOR_BLUE;
 171
 172         color_fprintf(stdout, color,
 173                       ". ... Intel Processor Trace data: size %zu bytes\n",
 174                       len);
 175
 176         while (len) {
 177                 ret = intel_pt_get_packet(buf, len, &packet);
 178                 if (ret > 0)
 179                         pkt_len = ret;
 180                 else
 181                         pkt_len = 1;
 182                 printf(".");
 183                 color_fprintf(stdout, color, "  %08x: ", pos);
 184                 for (i = 0; i < pkt_len; i++)
 185                         color_fprintf(stdout, color, " %02x", buf[i]);
 186                 for (; i < 16; i++)
 187                         color_fprintf(stdout, color, "   ");
 188                 if (ret > 0) {
 189                         ret = intel_pt_pkt_desc(&packet, desc,
 190                                                 INTEL_PT_PKT_DESC_MAX);
 191                         if (ret > 0)
 192                                 color_fprintf(stdout, color, " %s\n", desc);
 193                 } else {
 194                         color_fprintf(stdout, color, " Bad packet!\n");
 195                 }
 196                 pos += pkt_len;
 197                 buf += pkt_len;
 198                 len -= pkt_len;
 199         }
 200 }
 201
 202 static void intel_pt_dump_event(struct intel_pt *pt, unsigned char *buf,
 203                                 size_t len)
 204 {
 205         printf(".\n");
 206         intel_pt_dump(pt, buf, len);
 207 }
 208
 209 static void intel_pt_log_event(union perf_event *event)
 210 {
 211         FILE *f = intel_pt_log_fp();
 212
 213         if (!intel_pt_enable_logging || !f)
 214                 return;
 215
 216         perf_event__fprintf(event, f);
 217 }
 218
 219 static int intel_pt_do_fix_overlap(struct intel_pt *pt, struct auxtrace_buffer *a,
 220                                    struct auxtrace_buffer *b)
 221 {
 222         bool consecutive = false;
 223         void *start;
 224
 225         start = intel_pt_find_overlap(a->data, a->size, b->data, b->size,
 226                                       pt->have_tsc, &consecutive);
 227         if (!start)
 228                 return -EINVAL;
 229         b->use_size = b->data + b->size - start;
 230         b->use_data = start;
 231         if (b->use_size && consecutive)
 232                 b->consecutive = true;
 233         return 0;
 234 }
 235
 236 /* This function assumes data is processed sequentially only */
 237 static int intel_pt_get_trace(struct intel_pt_buffer *b, void *data)
 238 {
 239         struct intel_pt_queue *ptq = data;
 240         struct auxtrace_buffer *buffer = ptq->buffer;
 241         struct auxtrace_buffer *old_buffer = ptq->old_buffer;
 242         struct auxtrace_queue *queue;
 243         bool might_overlap;
 244
 245         if (ptq->stop) {
 246                 b->len = 0;
 247                 return 0;
 248         }
 249
 250         queue = &ptq->pt->queues.queue_array[ptq->queue_nr];
 251
 252         buffer = auxtrace_buffer__next(queue, buffer);
 253         if (!buffer) {
 254                 if (old_buffer)
 255                         auxtrace_buffer__drop_data(old_buffer);
 256                 b->len = 0;
 257                 return 0;
 258         }
 259
 260         ptq->buffer = buffer;
 261
 262         if (!buffer->data) {
 263                 int fd = perf_data__fd(ptq->pt->session->data);
 264
 265                 buffer->data = auxtrace_buffer__get_data(buffer, fd);
 266                 if (!buffer->data)
 267                         return -ENOMEM;
 268         }
 269
 270         might_overlap = ptq->pt->snapshot_mode || ptq->pt->sampling_mode;
 271         if (might_overlap && !buffer->consecutive && old_buffer &&
 272             intel_pt_do_fix_overlap(ptq->pt, old_buffer, buffer))
 273                 return -ENOMEM;
 274
 275         if (buffer->use_data) {
 276                 b->len = buffer->use_size;
 277                 b->buf = buffer->use_data;
 278         } else {
 279                 b->len = buffer->size;
 280                 b->buf = buffer->data;
 281         }
 282         b->ref_timestamp = buffer->reference;
 283
 284         if (!old_buffer || (might_overlap && !buffer->consecutive)) {
 285                 b->consecutive = false;
 286                 b->trace_nr = buffer->buffer_nr + 1;
 287         } else {
 288                 b->consecutive = true;
 289         }
 290
 291         if (ptq->step_through_buffers)
 292                 ptq->stop = true;
 293
 294         if (b->len) {
 295                 if (old_buffer)
 296                         auxtrace_buffer__drop_data(old_buffer);
 297                 ptq->old_buffer = buffer;
 298         } else {
 299                 auxtrace_buffer__drop_data(buffer);
 300                 return intel_pt_get_trace(b, data);
 301         }
 302
 303         return 0;
 304 }
 305
 306 struct intel_pt_cache_entry {
 307         struct auxtrace_cache_entry     entry;
 308         u64                             insn_cnt;
 309         u64                             byte_cnt;
 310         enum intel_pt_insn_op           op;
 311         enum intel_pt_insn_branch       branch;
 312         int                             length;
 313         int32_t                         rel;
 314         char                            insn[INTEL_PT_INSN_BUF_SZ];
 315 };
 316
 317 static int intel_pt_config_div(const char *var, const char *value, void *data)
 318 {
 319         int *d = data;
 320         long val;
 321
 322         if (!strcmp(var, "intel-pt.cache-divisor")) {
 323                 val = strtol(value, NULL, 0);
 324                 if (val > 0 && val <= INT_MAX)
 325                         *d = val;
 326         }
 327
 328         return 0;
 329 }
 330
 331 static int intel_pt_cache_divisor(void)
 332 {
 333         static int d;
 334
 335         if (d)
 336                 return d;
 337
 338         perf_config(intel_pt_config_div, &d);
 339
 340         if (!d)
 341                 d = 64;
 342
 343         return d;
 344 }
 345
 346 static unsigned int intel_pt_cache_size(struct dso *dso,
 347                                         struct machine *machine)
 348 {
 349         off_t size;
 350
 351         size = dso__data_size(dso, machine);
 352         size /= intel_pt_cache_divisor();
 353         if (size < 1000)
 354                 return 10;
 355         if (size > (1 << 21))
 356                 return 21;
 357         return 32 - __builtin_clz(size);
 358 }
 359
 360 static struct auxtrace_cache *intel_pt_cache(struct dso *dso,
 361                                              struct machine *machine)
 362 {
 363         struct auxtrace_cache *c;
 364         unsigned int bits;
 365
 366         if (dso->auxtrace_cache)
 367                 return dso->auxtrace_cache;
 368
 369         bits = intel_pt_cache_size(dso, machine);
 370
 371         /* Ignoring cache creation failure */
 372         c = auxtrace_cache__new(bits, sizeof(struct intel_pt_cache_entry), 200);
 373
 374         dso->auxtrace_cache = c;
 375
 376         return c;
 377 }
 378
 379 static int intel_pt_cache_add(struct dso *dso, struct machine *machine,
 380                               u64 offset, u64 insn_cnt, u64 byte_cnt,
 381                               struct intel_pt_insn *intel_pt_insn)
 382 {
 383         struct auxtrace_cache *c = intel_pt_cache(dso, machine);
 384         struct intel_pt_cache_entry *e;
 385         int err;
 386
 387         if (!c)
 388                 return -ENOMEM;
 389
 390         e = auxtrace_cache__alloc_entry(c);
 391         if (!e)
 392                 return -ENOMEM;
 393
 394         e->insn_cnt = insn_cnt;
 395         e->byte_cnt = byte_cnt;
 396         e->op = intel_pt_insn->op;
 397         e->branch = intel_pt_insn->branch;
 398         e->length = intel_pt_insn->length;
 399         e->rel = intel_pt_insn->rel;
 400         memcpy(e->insn, intel_pt_insn->buf, INTEL_PT_INSN_BUF_SZ);
 401
 402         err = auxtrace_cache__add(c, offset, &e->entry);
 403         if (err)
 404                 auxtrace_cache__free_entry(c, e);
 405
 406         return err;
 407 }
 408
 409 static struct intel_pt_cache_entry *
 410 intel_pt_cache_lookup(struct dso *dso, struct machine *machine, u64 offset)
 411 {
 412         struct auxtrace_cache *c = intel_pt_cache(dso, machine);
 413
 414         if (!c)
 415                 return NULL;
 416
 417         return auxtrace_cache__lookup(dso->auxtrace_cache, offset);
 418 }
 419
 420 static inline u8 intel_pt_cpumode(struct intel_pt *pt, uint64_t ip)
 421 {
 422         return ip >= pt->kernel_start ?
 423                PERF_RECORD_MISC_KERNEL :
 424                PERF_RECORD_MISC_USER;
 425 }
 426
 427 static int intel_pt_walk_next_insn(struct intel_pt_insn *intel_pt_insn,
 428                                    uint64_t *insn_cnt_ptr, uint64_t *ip,
 429                                    uint64_t to_ip, uint64_t max_insn_cnt,
 430                                    void *data)
 431 {
 432         struct intel_pt_queue *ptq = data;
 433         struct machine *machine = ptq->pt->machine;
 434         struct thread *thread;
 435         struct addr_location al;
 436         unsigned char buf[INTEL_PT_INSN_BUF_SZ];
 437         ssize_t len;
 438         int x86_64;
 439         u8 cpumode;
 440         u64 offset, start_offset, start_ip;
 441         u64 insn_cnt = 0;
 442         bool one_map = true;
 443
 444         intel_pt_insn->length = 0;
 445
 446         if (to_ip && *ip == to_ip)
 447                 goto out_no_cache;
 448
 449         cpumode = intel_pt_cpumode(ptq->pt, *ip);
 450
 451         thread = ptq->thread;
 452         if (!thread) {
 453                 if (cpumode != PERF_RECORD_MISC_KERNEL)
 454                         return -EINVAL;
 455                 thread = ptq->pt->unknown_thread;
 456         }
 457
 458         while (1) {
 459                 if (!thread__find_map(thread, cpumode, *ip, &al) || !al.map->dso)
 460                         return -EINVAL;
 461
 462                 if (al.map->dso->data.status == DSO_DATA_STATUS_ERROR &&
 463                     dso__data_status_seen(al.map->dso,
 464                                           DSO_DATA_STATUS_SEEN_ITRACE))
 465                         return -ENOENT;
 466
 467                 offset = al.map->map_ip(al.map, *ip);
 468
 469                 if (!to_ip && one_map) {
 470                         struct intel_pt_cache_entry *e;
 471
 472                         e = intel_pt_cache_lookup(al.map->dso, machine, offset);
 473                         if (e &&
 474                             (!max_insn_cnt || e->insn_cnt <= max_insn_cnt)) {
 475                                 *insn_cnt_ptr = e->insn_cnt;
 476                                 *ip += e->byte_cnt;
 477                                 intel_pt_insn->op = e->op;
 478                                 intel_pt_insn->branch = e->branch;
 479                                 intel_pt_insn->length = e->length;
 480                                 intel_pt_insn->rel = e->rel;
 481                                 memcpy(intel_pt_insn->buf, e->insn,
 482                                        INTEL_PT_INSN_BUF_SZ);
 483                                 intel_pt_log_insn_no_data(intel_pt_insn, *ip);
 484                                 return 0;
 485                         }
 486                 }
 487
 488                 start_offset = offset;
 489                 start_ip = *ip;
 490
 491                 /* Load maps to ensure dso->is_64_bit has been updated */
 492                 map__load(al.map);
 493
 494                 x86_64 = al.map->dso->is_64_bit;
 495
 496                 while (1) {
 497                         len = dso__data_read_offset(al.map->dso, machine,
 498                                                     offset, buf,
 499                                                     INTEL_PT_INSN_BUF_SZ);
 500                         if (len <= 0)
 501                                 return -EINVAL;
 502
 503                         if (intel_pt_get_insn(buf, len, x86_64, intel_pt_insn))
 504                                 return -EINVAL;
 505
 506                         intel_pt_log_insn(intel_pt_insn, *ip);
 507
 508                         insn_cnt += 1;
 509
 510                         if (intel_pt_insn->branch != INTEL_PT_BR_NO_BRANCH)
 511                                 goto out;
 512
 513                         if (max_insn_cnt && insn_cnt >= max_insn_cnt)
 514                                 goto out_no_cache;
 515
 516                         *ip += intel_pt_insn->length;
 517
 518                         if (to_ip && *ip == to_ip)
 519                                 goto out_no_cache;
 520
 521                         if (*ip >= al.map->end)
 522                                 break;
 523
 524                         offset += intel_pt_insn->length;
 525                 }
 526                 one_map = false;
 527         }
 528 out:
 529         *insn_cnt_ptr = insn_cnt;
 530
 531         if (!one_map)
 532                 goto out_no_cache;
 533
 534         /*
 535          * Didn't lookup in the 'to_ip' case, so do it now to prevent duplicate
 536          * entries.
 537          */
 538         if (to_ip) {
 539                 struct intel_pt_cache_entry *e;
 540
 541                 e = intel_pt_cache_lookup(al.map->dso, machine, start_offset);
 542                 if (e)
 543                         return 0;
 544         }
 545
 546         /* Ignore cache errors */
 547         intel_pt_cache_add(al.map->dso, machine, start_offset, insn_cnt,
 548                            *ip - start_ip, intel_pt_insn);
 549
 550         return 0;
 551
 552 out_no_cache:
 553         *insn_cnt_ptr = insn_cnt;
 554         return 0;
 555 }
 556
 557 static bool intel_pt_match_pgd_ip(struct intel_pt *pt, uint64_t ip,
 558                                   uint64_t offset, const char *filename)
 559 {
 560         struct addr_filter *filt;
 561         bool have_filter   = false;
 562         bool hit_tracestop = false;
 563         bool hit_filter    = false;
 564
 565         list_for_each_entry(filt, &pt->filts.head, list) {
 566                 if (filt->start)
 567                         have_filter = true;
 568
 569                 if ((filename && !filt->filename) ||
 570                     (!filename && filt->filename) ||
 571                     (filename && strcmp(filename, filt->filename)))
 572                         continue;
 573
 574                 if (!(offset >= filt->addr && offset < filt->addr + filt->size))
 575                         continue;
 576
 577                 intel_pt_log("TIP.PGD ip %#"PRIx64" offset %#"PRIx64" in %s hit filter: %s offset %#"PRIx64" size %#"PRIx64"\n",
 578                              ip, offset, filename ? filename : "[kernel]",
 579                              filt->start ? "filter" : "stop",
 580                              filt->addr, filt->size);
 581
 582                 if (filt->start)
 583                         hit_filter = true;
 584                 else
 585                         hit_tracestop = true;
 586         }
 587
 588         if (!hit_tracestop && !hit_filter)
 589                 intel_pt_log("TIP.PGD ip %#"PRIx64" offset %#"PRIx64" in %s is not in a filter region\n",
 590                              ip, offset, filename ? filename : "[kernel]");
 591
 592         return hit_tracestop || (have_filter && !hit_filter);
 593 }
 594
 595 static int __intel_pt_pgd_ip(uint64_t ip, void *data)
 596 {
 597         struct intel_pt_queue *ptq = data;
 598         struct thread *thread;
 599         struct addr_location al;
 600         u8 cpumode;
 601         u64 offset;
 602
 603         if (ip >= ptq->pt->kernel_start)
 604                 return intel_pt_match_pgd_ip(ptq->pt, ip, ip, NULL);
 605
 606         cpumode = PERF_RECORD_MISC_USER;
 607
 608         thread = ptq->thread;
 609         if (!thread)
 610                 return -EINVAL;
 611
 612         if (!thread__find_map(thread, cpumode, ip, &al) || !al.map->dso)
 613                 return -EINVAL;
 614
 615         offset = al.map->map_ip(al.map, ip);
 616
 617         return intel_pt_match_pgd_ip(ptq->pt, ip, offset,
 618                                      al.map->dso->long_name);
 619 }
 620
 621 static bool intel_pt_pgd_ip(uint64_t ip, void *data)
 622 {
 623         return __intel_pt_pgd_ip(ip, data) > 0;
 624 }
 625
 626 static bool intel_pt_get_config(struct intel_pt *pt,
 627                                 struct perf_event_attr *attr, u64 *config)
 628 {
 629         if (attr->type == pt->pmu_type) {
 630                 if (config)
 631                         *config = attr->config;
 632                 return true;
 633         }
 634
 635         return false;
 636 }
 637
 638 static bool intel_pt_exclude_kernel(struct intel_pt *pt)
 639 {
 640         struct perf_evsel *evsel;
 641
 642         evlist__for_each_entry(pt->session->evlist, evsel) {
 643                 if (intel_pt_get_config(pt, &evsel->attr, NULL) &&
 644                     !evsel->attr.exclude_kernel)
 645                         return false;
 646         }
 647         return true;
 648 }
 649
 650 static bool intel_pt_return_compression(struct intel_pt *pt)
 651 {
 652         struct perf_evsel *evsel;
 653         u64 config;
 654
 655         if (!pt->noretcomp_bit)
 656                 return true;
 657
 658         evlist__for_each_entry(pt->session->evlist, evsel) {
 659                 if (intel_pt_get_config(pt, &evsel->attr, &config) &&
 660                     (config & pt->noretcomp_bit))
 661                         return false;
 662         }
 663         return true;
 664 }
 665
 666 static bool intel_pt_branch_enable(struct intel_pt *pt)
 667 {
 668         struct perf_evsel *evsel;
 669         u64 config;
 670
 671         evlist__for_each_entry(pt->session->evlist, evsel) {
 672                 if (intel_pt_get_config(pt, &evsel->attr, &config) &&
 673                     (config & 1) && !(config & 0x2000))
 674                         return false;
 675         }
 676         return true;
 677 }
 678
 679 static unsigned int intel_pt_mtc_period(struct intel_pt *pt)
 680 {
 681         struct perf_evsel *evsel;
 682         unsigned int shift;
 683         u64 config;
 684
 685         if (!pt->mtc_freq_bits)
 686                 return 0;
 687
 688         for (shift = 0, config = pt->mtc_freq_bits; !(config & 1); shift++)
 689                 config >>= 1;
 690
 691         evlist__for_each_entry(pt->session->evlist, evsel) {
 692                 if (intel_pt_get_config(pt, &evsel->attr, &config))
 693                         return (config & pt->mtc_freq_bits) >> shift;
 694         }
 695         return 0;
 696 }
 697
 698 static bool intel_pt_timeless_decoding(struct intel_pt *pt)
 699 {
 700         struct perf_evsel *evsel;
 701         bool timeless_decoding = true;
 702         u64 config;
 703
 704         if (!pt->tsc_bit || !pt->cap_user_time_zero)
 705                 return true;
 706
 707         evlist__for_each_entry(pt->session->evlist, evsel) {
 708                 if (!(evsel->attr.sample_type & PERF_SAMPLE_TIME))
 709                         return true;
 710                 if (intel_pt_get_config(pt, &evsel->attr, &config)) {
 711                         if (config & pt->tsc_bit)
 712                                 timeless_decoding = false;
 713                         else
 714                                 return true;
 715                 }
 716         }
 717         return timeless_decoding;
 718 }
 719
 720 static bool intel_pt_tracing_kernel(struct intel_pt *pt)
 721 {
 722         struct perf_evsel *evsel;
 723
 724         evlist__for_each_entry(pt->session->evlist, evsel) {
 725                 if (intel_pt_get_config(pt, &evsel->attr, NULL) &&
 726                     !evsel->attr.exclude_kernel)
 727                         return true;
 728         }
 729         return false;
 730 }
 731
 732 static bool intel_pt_have_tsc(struct intel_pt *pt)
 733 {
 734         struct perf_evsel *evsel;
 735         bool have_tsc = false;
 736         u64 config;
 737
 738         if (!pt->tsc_bit)
 739                 return false;
 740
 741         evlist__for_each_entry(pt->session->evlist, evsel) {
 742                 if (intel_pt_get_config(pt, &evsel->attr, &config)) {
 743                         if (config & pt->tsc_bit)
 744                                 have_tsc = true;
 745                         else
 746                                 return false;
 747                 }
 748         }
 749         return have_tsc;
 750 }
 751
 752 static u64 intel_pt_ns_to_ticks(const struct intel_pt *pt, u64 ns)
 753 {
 754         u64 quot, rem;
 755
 756         quot = ns / pt->tc.time_mult;
 757         rem  = ns % pt->tc.time_mult;
 758         return (quot << pt->tc.time_shift) + (rem << pt->tc.time_shift) /
 759                 pt->tc.time_mult;
 760 }
 761
 762 static struct intel_pt_queue *intel_pt_alloc_queue(struct intel_pt *pt,
 763                                                    unsigned int queue_nr)
 764 {
 765         struct intel_pt_params params = { .get_trace = 0, };
 766         struct perf_env *env = pt->machine->env;
 767         struct intel_pt_queue *ptq;
 768
 769         ptq = zalloc(sizeof(struct intel_pt_queue));
 770         if (!ptq)
 771                 return NULL;
 772
 773         if (pt->synth_opts.callchain) {
 774                 size_t sz = sizeof(struct ip_callchain);
 775
 776                 /* Add 1 to callchain_sz for callchain context */
 777                 sz += (pt->synth_opts.callchain_sz + 1) * sizeof(u64);
 778                 ptq->chain = zalloc(sz);
 779                 if (!ptq->chain)
 780                         goto out_free;
 781         }
 782
 783         if (pt->synth_opts.last_branch) {
 784                 size_t sz = sizeof(struct branch_stack);
 785
 786                 sz += pt->synth_opts.last_branch_sz *
 787                       sizeof(struct branch_entry);
 788                 ptq->last_branch = zalloc(sz);
 789                 if (!ptq->last_branch)
 790                         goto out_free;
 791                 ptq->last_branch_rb = zalloc(sz);
 792                 if (!ptq->last_branch_rb)
 793                         goto out_free;
 794         }
 795
 796         ptq->event_buf = malloc(PERF_SAMPLE_MAX_SIZE);
 797         if (!ptq->event_buf)
 798                 goto out_free;
 799
 800         ptq->pt = pt;
 801         ptq->queue_nr = queue_nr;
 802         ptq->exclude_kernel = intel_pt_exclude_kernel(pt);
 803         ptq->pid = -1;
 804         ptq->tid = -1;
 805         ptq->cpu = -1;
 806         ptq->next_tid = -1;
 807
 808         params.get_trace = intel_pt_get_trace;
 809         params.walk_insn = intel_pt_walk_next_insn;
 810         params.data = ptq;
 811         params.return_compression = intel_pt_return_compression(pt);
 812         params.branch_enable = intel_pt_branch_enable(pt);
 813         params.max_non_turbo_ratio = pt->max_non_turbo_ratio;
 814         params.mtc_period = intel_pt_mtc_period(pt);
 815         params.tsc_ctc_ratio_n = pt->tsc_ctc_ratio_n;
 816         params.tsc_ctc_ratio_d = pt->tsc_ctc_ratio_d;
 817
 818         if (pt->filts.cnt > 0)
 819                 params.pgd_ip = intel_pt_pgd_ip;
 820
 821         if (pt->synth_opts.instructions) {
 822                 if (pt->synth_opts.period) {
 823                         switch (pt->synth_opts.period_type) {
 824                         case PERF_ITRACE_PERIOD_INSTRUCTIONS:
 825                                 params.period_type =
 826                                                 INTEL_PT_PERIOD_INSTRUCTIONS;
 827                                 params.period = pt->synth_opts.period;
 828                                 break;
 829                         case PERF_ITRACE_PERIOD_TICKS:
 830                                 params.period_type = INTEL_PT_PERIOD_TICKS;
 831                                 params.period = pt->synth_opts.period;
 832                                 break;
 833                         case PERF_ITRACE_PERIOD_NANOSECS:
 834                                 params.period_type = INTEL_PT_PERIOD_TICKS;
 835                                 params.period = intel_pt_ns_to_ticks(pt,
 836                                                         pt->synth_opts.period);
 837                                 break;
 838                         default:
 839                                 break;
 840                         }
 841                 }
 842
 843                 if (!params.period) {
 844                         params.period_type = INTEL_PT_PERIOD_INSTRUCTIONS;
 845                         params.period = 1;
 846                 }
 847         }
 848
 849         if (env->cpuid && !strncmp(env->cpuid, "GenuineIntel,6,92,", 18))
 850                 params.flags |= INTEL_PT_FUP_WITH_NLIP;
 851
 852         ptq->decoder = intel_pt_decoder_new(&params);
 853         if (!ptq->decoder)
 854                 goto out_free;
 855
 856         return ptq;
 857
 858 out_free:
 859         zfree(&ptq->event_buf);
 860         zfree(&ptq->last_branch);
 861         zfree(&ptq->last_branch_rb);
 862         zfree(&ptq->chain);
 863         free(ptq);
 864         return NULL;
 865 }
 866
 867 static void intel_pt_free_queue(void *priv)
 868 {
 869         struct intel_pt_queue *ptq = priv;
 870
 871         if (!ptq)
 872                 return;
 873         thread__zput(ptq->thread);
 874         intel_pt_decoder_free(ptq->decoder);
 875         zfree(&ptq->event_buf);
 876         zfree(&ptq->last_branch);
 877         zfree(&ptq->last_branch_rb);
 878         zfree(&ptq->chain);
 879         free(ptq);
 880 }
 881
 882 static void intel_pt_set_pid_tid_cpu(struct intel_pt *pt,
 883                                      struct auxtrace_queue *queue)
 884 {
 885         struct intel_pt_queue *ptq = queue->priv;
 886
 887         if (queue->tid == -1 || pt->have_sched_switch) {
 888                 ptq->tid = machine__get_current_tid(pt->machine, ptq->cpu);
 889                 thread__zput(ptq->thread);
 890         }
 891
 892         if (!ptq->thread && ptq->tid != -1)
 893                 ptq->thread = machine__find_thread(pt->machine, -1, ptq->tid);
 894
 895         if (ptq->thread) {
 896                 ptq->pid = ptq->thread->pid_;
 897                 if (queue->cpu == -1)
 898                         ptq->cpu = ptq->thread->cpu;
 899         }
 900 }
 901
 902 static void intel_pt_sample_flags(struct intel_pt_queue *ptq)
 903 {
 904         if (ptq->state->flags & INTEL_PT_ABORT_TX) {
 905                 ptq->flags = PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TX_ABORT;
 906         } else if (ptq->state->flags & INTEL_PT_ASYNC) {
 907                 if (ptq->state->to_ip)
 908                         ptq->flags = PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL |
 909                                      PERF_IP_FLAG_ASYNC |
 910                                      PERF_IP_FLAG_INTERRUPT;
 911                 else
 912                         ptq->flags = PERF_IP_FLAG_BRANCH |
 913                                      PERF_IP_FLAG_TRACE_END;
 914                 ptq->insn_len = 0;
 915         } else {
 916                 if (ptq->state->from_ip)
 917                         ptq->flags = intel_pt_insn_type(ptq->state->insn_op);
 918                 else
 919                         ptq->flags = PERF_IP_FLAG_BRANCH |
 920                                      PERF_IP_FLAG_TRACE_BEGIN;
 921                 if (ptq->state->flags & INTEL_PT_IN_TX)
 922                         ptq->flags |= PERF_IP_FLAG_IN_TX;
 923                 ptq->insn_len = ptq->state->insn_len;
 924                 memcpy(ptq->insn, ptq->state->insn, INTEL_PT_INSN_BUF_SZ);
 925         }
 926
 927         if (ptq->state->type & INTEL_PT_TRACE_BEGIN)
 928                 ptq->flags |= PERF_IP_FLAG_TRACE_BEGIN;
 929         if (ptq->state->type & INTEL_PT_TRACE_END)
 930                 ptq->flags |= PERF_IP_FLAG_TRACE_END;
 931 }
 932
 933 static int intel_pt_setup_queue(struct intel_pt *pt,
 934                                 struct auxtrace_queue *queue,
 935                                 unsigned int queue_nr)
 936 {
 937         struct intel_pt_queue *ptq = queue->priv;
 938
 939         if (list_empty(&queue->head))
 940                 return 0;
 941
 942         if (!ptq) {
 943                 ptq = intel_pt_alloc_queue(pt, queue_nr);
 944                 if (!ptq)
 945                         return -ENOMEM;
 946                 queue->priv = ptq;
 947
 948                 if (queue->cpu != -1)
 949                         ptq->cpu = queue->cpu;
 950                 ptq->tid = queue->tid;
 951
 952                 if (pt->sampling_mode && !pt->snapshot_mode &&
 953                     pt->timeless_decoding)
 954                         ptq->step_through_buffers = true;
 955
 956                 ptq->sync_switch = pt->sync_switch;
 957         }
 958
 959         if (!ptq->on_heap &&
 960             (!ptq->sync_switch ||
 961              ptq->switch_state != INTEL_PT_SS_EXPECTING_SWITCH_EVENT)) {
 962                 const struct intel_pt_state *state;
 963                 int ret;
 964
 965                 if (pt->timeless_decoding)
 966                         return 0;
 967
 968                 intel_pt_log("queue %u getting timestamp\n", queue_nr);
 969                 intel_pt_log("queue %u decoding cpu %d pid %d tid %d\n",
 970                              queue_nr, ptq->cpu, ptq->pid, ptq->tid);
 971                 while (1) {
 972                         state = intel_pt_decode(ptq->decoder);
 973                         if (state->err) {
 974                                 if (state->err == INTEL_PT_ERR_NODATA) {
 975                                         intel_pt_log("queue %u has no timestamp\n",
 976                                                      queue_nr);
 977                                         return 0;
 978                                 }
 979                                 continue;
 980                         }
 981                         if (state->timestamp)
 982                                 break;
 983                 }
 984
 985                 ptq->timestamp = state->timestamp;
 986                 intel_pt_log("queue %u timestamp 0x%" PRIx64 "\n",
 987                              queue_nr, ptq->timestamp);
 988                 ptq->state = state;
 989                 ptq->have_sample = true;
 990                 intel_pt_sample_flags(ptq);
 991                 ret = auxtrace_heap__add(&pt->heap, queue_nr, ptq->timestamp);
 992                 if (ret)
 993                         return ret;
 994                 ptq->on_heap = true;
 995         }
 996
 997         return 0;
 998 }
 999
1000 static int intel_pt_setup_queues(struct intel_pt *pt)
1001 {
1002         unsigned int i;
1003         int ret;
1004
1005         for (i = 0; i < pt->queues.nr_queues; i++) {
1006                 ret = intel_pt_setup_queue(pt, &pt->queues.queue_array[i], i);
1007                 if (ret)
1008                         return ret;
1009         }
1010         return 0;
1011 }
1012
1013 static inline void intel_pt_copy_last_branch_rb(struct intel_pt_queue *ptq)
1014 {
1015         struct branch_stack *bs_src = ptq->last_branch_rb;
1016         struct branch_stack *bs_dst = ptq->last_branch;
1017         size_t nr = 0;
1018
1019         bs_dst->nr = bs_src->nr;
1020
1021         if (!bs_src->nr)
1022                 return;
1023
1024         nr = ptq->pt->synth_opts.last_branch_sz - ptq->last_branch_pos;
1025         memcpy(&bs_dst->entries[0],
1026                &bs_src->entries[ptq->last_branch_pos],
1027                sizeof(struct branch_entry) * nr);
1028
1029         if (bs_src->nr >= ptq->pt->synth_opts.last_branch_sz) {
1030                 memcpy(&bs_dst->entries[nr],
1031                        &bs_src->entries[0],
1032                        sizeof(struct branch_entry) * ptq->last_branch_pos);
1033         }
1034 }
1035
1036 static inline void intel_pt_reset_last_branch_rb(struct intel_pt_queue *ptq)
1037 {
1038         ptq->last_branch_pos = 0;
1039         ptq->last_branch_rb->nr = 0;
1040 }
1041
1042 static void intel_pt_update_last_branch_rb(struct intel_pt_queue *ptq)
1043 {
1044         const struct intel_pt_state *state = ptq->state;
1045         struct branch_stack *bs = ptq->last_branch_rb;
1046         struct branch_entry *be;
1047
1048         if (!ptq->last_branch_pos)
1049                 ptq->last_branch_pos = ptq->pt->synth_opts.last_branch_sz;
1050
1051         ptq->last_branch_pos -= 1;
1052
1053         be              = &bs->entries[ptq->last_branch_pos];
1054         be->from        = state->from_ip;
1055         be->to          = state->to_ip;
1056         be->flags.abort = !!(state->flags & INTEL_PT_ABORT_TX);
1057         be->flags.in_tx = !!(state->flags & INTEL_PT_IN_TX);
1058         /* No support for mispredict */
1059         be->flags.mispred = ptq->pt->mispred_all;
1060
1061         if (bs->nr < ptq->pt->synth_opts.last_branch_sz)
1062                 bs->nr += 1;
1063 }
1064
1065 static inline bool intel_pt_skip_event(struct intel_pt *pt)
1066 {
1067         return pt->synth_opts.initial_skip &&
1068                pt->num_events++ < pt->synth_opts.initial_skip;
1069 }
1070
1071 static void intel_pt_prep_b_sample(struct intel_pt *pt,
1072                                    struct intel_pt_queue *ptq,
1073                                    union perf_event *event,
1074                                    struct perf_sample *sample)
1075 {
1076         if (!pt->timeless_decoding)
1077                 sample->time = tsc_to_perf_time(ptq->timestamp, &pt->tc);
1078
1079         sample->ip = ptq->state->from_ip;
1080         sample->cpumode = intel_pt_cpumode(pt, sample->ip);
1081         sample->pid = ptq->pid;
1082         sample->tid = ptq->tid;
1083         sample->addr = ptq->state->to_ip;
1084         sample->period = 1;
1085         sample->cpu = ptq->cpu;
1086         sample->flags = ptq->flags;
1087         sample->insn_len = ptq->insn_len;
1088         memcpy(sample->insn, ptq->insn, INTEL_PT_INSN_BUF_SZ);
1089
1090         event->sample.header.type = PERF_RECORD_SAMPLE;
1091         event->sample.header.misc = sample->cpumode;
1092         event->sample.header.size = sizeof(struct perf_event_header);
1093 }
1094
1095 static int intel_pt_inject_event(union perf_event *event,
1096                                  struct perf_sample *sample, u64 type)
1097 {
1098         event->header.size = perf_event__sample_event_size(sample, type, 0);
1099         return perf_event__synthesize_sample(event, type, 0, sample);
1100 }
1101
1102 static inline int intel_pt_opt_inject(struct intel_pt *pt,
1103                                       union perf_event *event,
1104                                       struct perf_sample *sample, u64 type)
1105 {
1106         if (!pt->synth_opts.inject)
1107                 return 0;
1108
1109         return intel_pt_inject_event(event, sample, type);
1110 }
1111
1112 static int intel_pt_deliver_synth_b_event(struct intel_pt *pt,
1113                                           union perf_event *event,
1114                                           struct perf_sample *sample, u64 type)
1115 {
1116         int ret;
1117
1118         ret = intel_pt_opt_inject(pt, event, sample, type);
1119         if (ret)
1120                 return ret;
1121
1122         ret = perf_session__deliver_synth_event(pt->session, event, sample);
1123         if (ret)
1124                 pr_err("Intel PT: failed to deliver event, error %d\n", ret);
1125
1126         return ret;
1127 }
1128
1129 static int intel_pt_synth_branch_sample(struct intel_pt_queue *ptq)
1130 {
1131         struct intel_pt *pt = ptq->pt;
1132         union perf_event *event = ptq->event_buf;
1133         struct perf_sample sample = { .ip = 0, };
1134         struct dummy_branch_stack {
1135                 u64                     nr;
1136                 struct branch_entry     entries;
1137         } dummy_bs;
1138
1139         if (pt->branches_filter && !(pt->branches_filter & ptq->flags))
1140                 return 0;
1141
1142         if (intel_pt_skip_event(pt))
1143                 return 0;
1144
1145         intel_pt_prep_b_sample(pt, ptq, event, &sample);
1146
1147         sample.id = ptq->pt->branches_id;
1148         sample.stream_id = ptq->pt->branches_id;
1149
1150         /*
1151          * perf report cannot handle events without a branch stack when using
1152          * SORT_MODE__BRANCH so make a dummy one.
1153          */
1154         if (pt->synth_opts.last_branch && sort__mode == SORT_MODE__BRANCH) {
1155                 dummy_bs = (struct dummy_branch_stack){
1156                         .nr = 1,
1157                         .entries = {
1158                                 .from = sample.ip,
1159                                 .to = sample.addr,
1160                         },
1161                 };
1162                 sample.branch_stack = (struct branch_stack *)&dummy_bs;
1163         }
1164
1165         return intel_pt_deliver_synth_b_event(pt, event, &sample,
1166                                               pt->branches_sample_type);
1167 }
1168
1169 static void intel_pt_prep_sample(struct intel_pt *pt,
1170                                  struct intel_pt_queue *ptq,
1171                                  union perf_event *event,
1172                                  struct perf_sample *sample)
1173 {
1174         intel_pt_prep_b_sample(pt, ptq, event, sample);
1175
1176         if (pt->synth_opts.callchain) {
1177                 thread_stack__sample(ptq->thread, ptq->cpu, ptq->chain,
1178                                      pt->synth_opts.callchain_sz + 1,
1179                                      sample->ip, pt->kernel_start);
1180                 sample->callchain = ptq->chain;
1181         }
1182
1183         if (pt->synth_opts.last_branch) {
1184                 intel_pt_copy_last_branch_rb(ptq);
1185                 sample->branch_stack = ptq->last_branch;
1186         }
1187 }
1188
1189 static inline int intel_pt_deliver_synth_event(struct intel_pt *pt,
1190                                                struct intel_pt_queue *ptq,
1191                                                union perf_event *event,
1192                                                struct perf_sample *sample,
1193                                                u64 type)
1194 {
1195         int ret;
1196
1197         ret = intel_pt_deliver_synth_b_event(pt, event, sample, type);
1198
1199         if (pt->synth_opts.last_branch)
1200                 intel_pt_reset_last_branch_rb(ptq);
1201
1202         return ret;
1203 }
1204
1205 static int intel_pt_synth_instruction_sample(struct intel_pt_queue *ptq)
1206 {
1207         struct intel_pt *pt = ptq->pt;
1208         union perf_event *event = ptq->event_buf;
1209         struct perf_sample sample = { .ip = 0, };
1210
1211         if (intel_pt_skip_event(pt))
1212                 return 0;
1213
1214         intel_pt_prep_sample(pt, ptq, event, &sample);
1215
1216         sample.id = ptq->pt->instructions_id;
1217         sample.stream_id = ptq->pt->instructions_id;
1218         sample.period = ptq->state->tot_insn_cnt - ptq->last_insn_cnt;
1219
1220         ptq->last_insn_cnt = ptq->state->tot_insn_cnt;
1221
1222         return intel_pt_deliver_synth_event(pt, ptq, event, &sample,
1223                                             pt->instructions_sample_type);
1224 }
1225
1226 static int intel_pt_synth_transaction_sample(struct intel_pt_queue *ptq)
1227 {
1228         struct intel_pt *pt = ptq->pt;
1229         union perf_event *event = ptq->event_buf;
1230         struct perf_sample sample = { .ip = 0, };
1231
1232         if (intel_pt_skip_event(pt))
1233                 return 0;
1234
1235         intel_pt_prep_sample(pt, ptq, event, &sample);
1236
1237         sample.id = ptq->pt->transactions_id;
1238         sample.stream_id = ptq->pt->transactions_id;
1239
1240         return intel_pt_deliver_synth_event(pt, ptq, event, &sample,
1241                                             pt->transactions_sample_type);
1242 }
1243
1244 static void intel_pt_prep_p_sample(struct intel_pt *pt,
1245                                    struct intel_pt_queue *ptq,
1246                                    union perf_event *event,
1247                                    struct perf_sample *sample)
1248 {
1249         intel_pt_prep_sample(pt, ptq, event, sample);
1250
1251         /*
1252          * Zero IP is used to mean "trace start" but that is not the case for
1253          * power or PTWRITE events with no IP, so clear the flags.
1254          */
1255         if (!sample->ip)
1256                 sample->flags = 0;
1257 }
1258
1259 static int intel_pt_synth_ptwrite_sample(struct intel_pt_queue *ptq)
1260 {
1261         struct intel_pt *pt = ptq->pt;
1262         union perf_event *event = ptq->event_buf;
1263         struct perf_sample sample = { .ip = 0, };
1264         struct perf_synth_intel_ptwrite raw;
1265
1266         if (intel_pt_skip_event(pt))
1267                 return 0;
1268
1269         intel_pt_prep_p_sample(pt, ptq, event, &sample);
1270
1271         sample.id = ptq->pt->ptwrites_id;
1272         sample.stream_id = ptq->pt->ptwrites_id;
1273
1274         raw.flags = 0;
1275         raw.ip = !!(ptq->state->flags & INTEL_PT_FUP_IP);
1276         raw.payload = cpu_to_le64(ptq->state->ptw_payload);
1277
1278         sample.raw_size = perf_synth__raw_size(raw);
1279         sample.raw_data = perf_synth__raw_data(&raw);
1280
1281         return intel_pt_deliver_synth_event(pt, ptq, event, &sample,
1282                                             pt->ptwrites_sample_type);
1283 }
1284
1285 static int intel_pt_synth_cbr_sample(struct intel_pt_queue *ptq)
1286 {
1287         struct intel_pt *pt = ptq->pt;
1288         union perf_event *event = ptq->event_buf;
1289         struct perf_sample sample = { .ip = 0, };
1290         struct perf_synth_intel_cbr raw;
1291         u32 flags;
1292
1293         if (intel_pt_skip_event(pt))
1294                 return 0;
1295
1296         intel_pt_prep_p_sample(pt, ptq, event, &sample);
1297
1298         sample.id = ptq->pt->cbr_id;
1299         sample.stream_id = ptq->pt->cbr_id;
1300
1301         flags = (u16)ptq->state->cbr_payload | (pt->max_non_turbo_ratio << 16);
1302         raw.flags = cpu_to_le32(flags);
1303         raw.freq = cpu_to_le32(raw.cbr * pt->cbr2khz);
1304         raw.reserved3 = 0;
1305
1306         sample.raw_size = perf_synth__raw_size(raw);
1307         sample.raw_data = perf_synth__raw_data(&raw);
1308
1309         return intel_pt_deliver_synth_event(pt, ptq, event, &sample,
1310                                             pt->pwr_events_sample_type);
1311 }
1312
1313 static int intel_pt_synth_mwait_sample(struct intel_pt_queue *ptq)
1314 {
1315         struct intel_pt *pt = ptq->pt;
1316         union perf_event *event = ptq->event_buf;
1317         struct perf_sample sample = { .ip = 0, };
1318         struct perf_synth_intel_mwait raw;
1319
1320         if (intel_pt_skip_event(pt))
1321                 return 0;
1322
1323         intel_pt_prep_p_sample(pt, ptq, event, &sample);
1324
1325         sample.id = ptq->pt->mwait_id;
1326         sample.stream_id = ptq->pt->mwait_id;
1327
1328         raw.reserved = 0;
1329         raw.payload = cpu_to_le64(ptq->state->mwait_payload);
1330
1331         sample.raw_size = perf_synth__raw_size(raw);
1332         sample.raw_data = perf_synth__raw_data(&raw);
1333
1334         return intel_pt_deliver_synth_event(pt, ptq, event, &sample,
1335                                             pt->pwr_events_sample_type);
1336 }
1337
1338 static int intel_pt_synth_pwre_sample(struct intel_pt_queue *ptq)
1339 {
1340         struct intel_pt *pt = ptq->pt;
1341         union perf_event *event = ptq->event_buf;
1342         struct perf_sample sample = { .ip = 0, };
1343         struct perf_synth_intel_pwre raw;
1344
1345         if (intel_pt_skip_event(pt))
1346                 return 0;
1347
1348         intel_pt_prep_p_sample(pt, ptq, event, &sample);
1349
1350         sample.id = ptq->pt->pwre_id;
1351         sample.stream_id = ptq->pt->pwre_id;
1352
1353         raw.reserved = 0;
1354         raw.payload = cpu_to_le64(ptq->state->pwre_payload);
1355
1356         sample.raw_size = perf_synth__raw_size(raw);
1357         sample.raw_data = perf_synth__raw_data(&raw);
1358
1359         return intel_pt_deliver_synth_event(pt, ptq, event, &sample,
1360                                             pt->pwr_events_sample_type);
1361 }
1362
1363 static int intel_pt_synth_exstop_sample(struct intel_pt_queue *ptq)
1364 {
1365         struct intel_pt *pt = ptq->pt;
1366         union perf_event *event = ptq->event_buf;
1367         struct perf_sample sample = { .ip = 0, };
1368         struct perf_synth_intel_exstop raw;
1369
1370         if (intel_pt_skip_event(pt))
1371                 return 0;
1372
1373         intel_pt_prep_p_sample(pt, ptq, event, &sample);
1374
1375         sample.id = ptq->pt->exstop_id;
1376         sample.stream_id = ptq->pt->exstop_id;
1377
1378         raw.flags = 0;
1379         raw.ip = !!(ptq->state->flags & INTEL_PT_FUP_IP);
1380
1381         sample.raw_size = perf_synth__raw_size(raw);
1382         sample.raw_data = perf_synth__raw_data(&raw);
1383
1384         return intel_pt_deliver_synth_event(pt, ptq, event, &sample,
1385                                             pt->pwr_events_sample_type);
1386 }
1387
1388 static int intel_pt_synth_pwrx_sample(struct intel_pt_queue *ptq)
1389 {
1390         struct intel_pt *pt = ptq->pt;
1391         union perf_event *event = ptq->event_buf;
1392         struct perf_sample sample = { .ip = 0, };
1393         struct perf_synth_intel_pwrx raw;
1394
1395         if (intel_pt_skip_event(pt))
1396                 return 0;
1397
1398         intel_pt_prep_p_sample(pt, ptq, event, &sample);
1399
1400         sample.id = ptq->pt->pwrx_id;
1401         sample.stream_id = ptq->pt->pwrx_id;
1402
1403         raw.reserved = 0;
1404         raw.payload = cpu_to_le64(ptq->state->pwrx_payload);
1405
1406         sample.raw_size = perf_synth__raw_size(raw);
1407         sample.raw_data = perf_synth__raw_data(&raw);
1408
1409         return intel_pt_deliver_synth_event(pt, ptq, event, &sample,
1410                                             pt->pwr_events_sample_type);
1411 }
1412
1413 static int intel_pt_synth_error(struct intel_pt *pt, int code, int cpu,
1414                                 pid_t pid, pid_t tid, u64 ip, u64 timestamp)
1415 {
1416         union perf_event event;
1417         char msg[MAX_AUXTRACE_ERROR_MSG];
1418         int err;
1419
1420         intel_pt__strerror(code, msg, MAX_AUXTRACE_ERROR_MSG);
1421
1422         auxtrace_synth_error(&event.auxtrace_error, PERF_AUXTRACE_ERROR_ITRACE,
1423                              code, cpu, pid, tid, ip, msg, timestamp);
1424
1425         err = perf_session__deliver_synth_event(pt->session, &event, NULL);
1426         if (err)
1427                 pr_err("Intel Processor Trace: failed to deliver error event, error %d\n",
1428                        err);
1429
1430         return err;
1431 }
1432
1433 static int intel_ptq_synth_error(struct intel_pt_queue *ptq,
1434                                  const struct intel_pt_state *state)
1435 {
1436         struct intel_pt *pt = ptq->pt;
1437         u64 tm = ptq->timestamp;
1438
1439         tm = pt->timeless_decoding ? 0 : tsc_to_perf_time(tm, &pt->tc);
1440
1441         return intel_pt_synth_error(pt, state->err, ptq->cpu, ptq->pid,
1442                                     ptq->tid, state->from_ip, tm);
1443 }
1444
1445 static int intel_pt_next_tid(struct intel_pt *pt, struct intel_pt_queue *ptq)
1446 {
1447         struct auxtrace_queue *queue;
1448         pid_t tid = ptq->next_tid;
1449         int err;
1450
1451         if (tid == -1)
1452                 return 0;
1453
1454         intel_pt_log("switch: cpu %d tid %d\n", ptq->cpu, tid);
1455
1456         err = machine__set_current_tid(pt->machine, ptq->cpu, -1, tid);
1457
1458         queue = &pt->queues.queue_array[ptq->queue_nr];
1459         intel_pt_set_pid_tid_cpu(pt, queue);
1460
1461         ptq->next_tid = -1;
1462
1463         return err;
1464 }
1465
1466 static inline bool intel_pt_is_switch_ip(struct intel_pt_queue *ptq, u64 ip)
1467 {
1468         struct intel_pt *pt = ptq->pt;
1469
1470         return ip == pt->switch_ip &&
1471                (ptq->flags & PERF_IP_FLAG_BRANCH) &&
1472                !(ptq->flags & (PERF_IP_FLAG_CONDITIONAL | PERF_IP_FLAG_ASYNC |
1473                                PERF_IP_FLAG_INTERRUPT | PERF_IP_FLAG_TX_ABORT));
1474 }
1475
1476 #define INTEL_PT_PWR_EVT (INTEL_PT_MWAIT_OP | INTEL_PT_PWR_ENTRY | \
1477                           INTEL_PT_EX_STOP | INTEL_PT_PWR_EXIT | \
1478                           INTEL_PT_CBR_CHG)
1479
1480 static int intel_pt_sample(struct intel_pt_queue *ptq)
1481 {
1482         const struct intel_pt_state *state = ptq->state;
1483         struct intel_pt *pt = ptq->pt;
1484         int err;
1485
1486         if (!ptq->have_sample)
1487                 return 0;
1488
1489         ptq->have_sample = false;
1490
1491         if (pt->sample_pwr_events && (state->type & INTEL_PT_PWR_EVT)) {
1492                 if (state->type & INTEL_PT_CBR_CHG) {
1493                         err = intel_pt_synth_cbr_sample(ptq);
1494                         if (err)
1495                                 return err;
1496                 }
1497                 if (state->type & INTEL_PT_MWAIT_OP) {
1498                         err = intel_pt_synth_mwait_sample(ptq);
1499                         if (err)
1500                                 return err;
1501                 }
1502                 if (state->type & INTEL_PT_PWR_ENTRY) {
1503                         err = intel_pt_synth_pwre_sample(ptq);
1504                         if (err)
1505                                 return err;
1506                 }
1507                 if (state->type & INTEL_PT_EX_STOP) {
1508                         err = intel_pt_synth_exstop_sample(ptq);
1509                         if (err)
1510                                 return err;
1511                 }
1512                 if (state->type & INTEL_PT_PWR_EXIT) {
1513                         err = intel_pt_synth_pwrx_sample(ptq);
1514                         if (err)
1515                                 return err;
1516                 }
1517         }
1518
1519         if (pt->sample_instructions && (state->type & INTEL_PT_INSTRUCTION)) {
1520                 err = intel_pt_synth_instruction_sample(ptq);
1521                 if (err)
1522                         return err;
1523         }
1524
1525         if (pt->sample_transactions && (state->type & INTEL_PT_TRANSACTION)) {
1526                 err = intel_pt_synth_transaction_sample(ptq);
1527                 if (err)
1528                         return err;
1529         }
1530
1531         if (pt->sample_ptwrites && (state->type & INTEL_PT_PTW)) {
1532                 err = intel_pt_synth_ptwrite_sample(ptq);
1533                 if (err)
1534                         return err;
1535         }
1536
1537         if (!(state->type & INTEL_PT_BRANCH))
1538                 return 0;
1539
1540         if (pt->synth_opts.callchain || pt->synth_opts.thread_stack)
1541                 thread_stack__event(ptq->thread, ptq->cpu, ptq->flags, state->from_ip,
1542                                     state->to_ip, ptq->insn_len,
1543                                     state->trace_nr);
1544         else
1545                 thread_stack__set_trace_nr(ptq->thread, ptq->cpu, state->trace_nr);
1546
1547         if (pt->sample_branches) {
1548                 err = intel_pt_synth_branch_sample(ptq);
1549                 if (err)
1550                         return err;
1551         }
1552
1553         if (pt->synth_opts.last_branch)
1554                 intel_pt_update_last_branch_rb(ptq);
1555
1556         if (!ptq->sync_switch)
1557                 return 0;
1558
1559         if (intel_pt_is_switch_ip(ptq, state->to_ip)) {
1560                 switch (ptq->switch_state) {
1561                 case INTEL_PT_SS_NOT_TRACING:
1562                 case INTEL_PT_SS_UNKNOWN:
1563                 case INTEL_PT_SS_EXPECTING_SWITCH_IP:
1564                         err = intel_pt_next_tid(pt, ptq);
1565                         if (err)
1566                                 return err;
1567                         ptq->switch_state = INTEL_PT_SS_TRACING;
1568                         break;
1569                 default:
1570                         ptq->switch_state = INTEL_PT_SS_EXPECTING_SWITCH_EVENT;
1571                         return 1;
1572                 }
1573         } else if (!state->to_ip) {
1574                 ptq->switch_state = INTEL_PT_SS_NOT_TRACING;
1575         } else if (ptq->switch_state == INTEL_PT_SS_NOT_TRACING) {
1576                 ptq->switch_state = INTEL_PT_SS_UNKNOWN;
1577         } else if (ptq->switch_state == INTEL_PT_SS_UNKNOWN &&
1578                    state->to_ip == pt->ptss_ip &&
1579                    (ptq->flags & PERF_IP_FLAG_CALL)) {
1580                 ptq->switch_state = INTEL_PT_SS_TRACING;
1581         }
1582
1583         return 0;
1584 }
1585
1586 static u64 intel_pt_switch_ip(struct intel_pt *pt, u64 *ptss_ip)
1587 {
1588         struct machine *machine = pt->machine;
1589         struct map *map;
1590         struct symbol *sym, *start;
1591         u64 ip, switch_ip = 0;
1592         const char *ptss;
1593
1594         if (ptss_ip)
1595                 *ptss_ip = 0;
1596
1597         map = machine__kernel_map(machine);
1598         if (!map)
1599                 return 0;
1600
1601         if (map__load(map))
1602                 return 0;
1603
1604         start = dso__first_symbol(map->dso);
1605
1606         for (sym = start; sym; sym = dso__next_symbol(sym)) {
1607                 if (sym->binding == STB_GLOBAL &&
1608                     !strcmp(sym->name, "__switch_to")) {
1609                         ip = map->unmap_ip(map, sym->start);
1610                         if (ip >= map->start && ip < map->end) {
1611                                 switch_ip = ip;
1612                                 break;
1613                         }
1614                 }
1615         }
1616
1617         if (!switch_ip || !ptss_ip)
1618                 return 0;
1619
1620         if (pt->have_sched_switch == 1)
1621                 ptss = "perf_trace_sched_switch";
1622         else
1623                 ptss = "__perf_event_task_sched_out";
1624
1625         for (sym = start; sym; sym = dso__next_symbol(sym)) {
1626                 if (!strcmp(sym->name, ptss)) {
1627                         ip = map->unmap_ip(map, sym->start);
1628                         if (ip >= map->start && ip < map->end) {
1629                                 *ptss_ip = ip;
1630                                 break;
1631                         }
1632                 }
1633         }
1634
1635         return switch_ip;
1636 }
1637
1638 static void intel_pt_enable_sync_switch(struct intel_pt *pt)
1639 {
1640         unsigned int i;
1641
1642         pt->sync_switch = true;
1643
1644         for (i = 0; i < pt->queues.nr_queues; i++) {
1645                 struct auxtrace_queue *queue = &pt->queues.queue_array[i];
1646                 struct intel_pt_queue *ptq = queue->priv;
1647
1648                 if (ptq)
1649                         ptq->sync_switch = true;
1650         }
1651 }
1652
1653 static int intel_pt_run_decoder(struct intel_pt_queue *ptq, u64 *timestamp)
1654 {
1655         const struct intel_pt_state *state = ptq->state;
1656         struct intel_pt *pt = ptq->pt;
1657         int err;
1658
1659         if (!pt->kernel_start) {
1660                 pt->kernel_start = machine__kernel_start(pt->machine);
1661                 if (pt->per_cpu_mmaps &&
1662                     (pt->have_sched_switch == 1 || pt->have_sched_switch == 3) &&
1663                     !pt->timeless_decoding && intel_pt_tracing_kernel(pt) &&
1664                     !pt->sampling_mode) {
1665                         pt->switch_ip = intel_pt_switch_ip(pt, &pt->ptss_ip);
1666                         if (pt->switch_ip) {
1667                                 intel_pt_log("switch_ip: %"PRIx64" ptss_ip: %"PRIx64"\n",
1668                                              pt->switch_ip, pt->ptss_ip);
1669                                 intel_pt_enable_sync_switch(pt);
1670                         }
1671                 }
1672         }
1673
1674         intel_pt_log("queue %u decoding cpu %d pid %d tid %d\n",
1675                      ptq->queue_nr, ptq->cpu, ptq->pid, ptq->tid);
1676         while (1) {
1677                 err = intel_pt_sample(ptq);
1678                 if (err)
1679                         return err;
1680
1681                 state = intel_pt_decode(ptq->decoder);
1682                 if (state->err) {
1683                         if (state->err == INTEL_PT_ERR_NODATA)
1684                                 return 1;
1685                         if (ptq->sync_switch &&
1686                             state->from_ip >= pt->kernel_start) {
1687                                 ptq->sync_switch = false;
1688                                 intel_pt_next_tid(pt, ptq);
1689                         }
1690                         if (pt->synth_opts.errors) {
1691                                 err = intel_ptq_synth_error(ptq, state);
1692                                 if (err)
1693                                         return err;
1694                         }
1695                         continue;
1696                 }
1697
1698                 ptq->state = state;
1699                 ptq->have_sample = true;
1700                 intel_pt_sample_flags(ptq);
1701
1702                 /* Use estimated TSC upon return to user space */
1703                 if (pt->est_tsc &&
1704                     (state->from_ip >= pt->kernel_start || !state->from_ip) &&
1705                     state->to_ip && state->to_ip < pt->kernel_start) {
1706                         intel_pt_log("TSC %"PRIx64" est. TSC %"PRIx64"\n",
1707                                      state->timestamp, state->est_timestamp);
1708                         ptq->timestamp = state->est_timestamp;
1709                 /* Use estimated TSC in unknown switch state */
1710                 } else if (ptq->sync_switch &&
1711                            ptq->switch_state == INTEL_PT_SS_UNKNOWN &&
1712                            intel_pt_is_switch_ip(ptq, state->to_ip) &&
1713                            ptq->next_tid == -1) {
1714                         intel_pt_log("TSC %"PRIx64" est. TSC %"PRIx64"\n",
1715                                      state->timestamp, state->est_timestamp);
1716                         ptq->timestamp = state->est_timestamp;
1717                 } else if (state->timestamp > ptq->timestamp) {
1718                         ptq->timestamp = state->timestamp;
1719                 }
1720
1721                 if (!pt->timeless_decoding && ptq->timestamp >= *timestamp) {
1722                         *timestamp = ptq->timestamp;
1723                         return 0;
1724                 }
1725         }
1726         return 0;
1727 }
1728
1729 static inline int intel_pt_update_queues(struct intel_pt *pt)
1730 {
1731         if (pt->queues.new_data) {
1732                 pt->queues.new_data = false;
1733                 return intel_pt_setup_queues(pt);
1734         }
1735         return 0;
1736 }
1737
1738 static int intel_pt_process_queues(struct intel_pt *pt, u64 timestamp)
1739 {
1740         unsigned int queue_nr;
1741         u64 ts;
1742         int ret;
1743
1744         while (1) {
1745                 struct auxtrace_queue *queue;
1746                 struct intel_pt_queue *ptq;
1747
1748                 if (!pt->heap.heap_cnt)
1749                         return 0;
1750
1751                 if (pt->heap.heap_array[0].ordinal >= timestamp)
1752                         return 0;
1753
1754                 queue_nr = pt->heap.heap_array[0].queue_nr;
1755                 queue = &pt->queues.queue_array[queue_nr];
1756                 ptq = queue->priv;
1757
1758                 intel_pt_log("queue %u processing 0x%" PRIx64 " to 0x%" PRIx64 "\n",
1759                              queue_nr, pt->heap.heap_array[0].ordinal,
1760                              timestamp);
1761
1762                 auxtrace_heap__pop(&pt->heap);
1763
1764                 if (pt->heap.heap_cnt) {
1765                         ts = pt->heap.heap_array[0].ordinal + 1;
1766                         if (ts > timestamp)
1767                                 ts = timestamp;
1768                 } else {
1769                         ts = timestamp;
1770                 }
1771
1772                 intel_pt_set_pid_tid_cpu(pt, queue);
1773
1774                 ret = intel_pt_run_decoder(ptq, &ts);
1775
1776                 if (ret < 0) {
1777                         auxtrace_heap__add(&pt->heap, queue_nr, ts);
1778                         return ret;
1779                 }
1780
1781                 if (!ret) {
1782                         ret = auxtrace_heap__add(&pt->heap, queue_nr, ts);
1783                         if (ret < 0)
1784                                 return ret;
1785                 } else {
1786                         ptq->on_heap = false;
1787                 }
1788         }
1789
1790         return 0;
1791 }
1792
1793 static int intel_pt_process_timeless_queues(struct intel_pt *pt, pid_t tid,
1794                                             u64 time_)
1795 {
1796         struct auxtrace_queues *queues = &pt->queues;
1797         unsigned int i;
1798         u64 ts = 0;
1799
1800         for (i = 0; i < queues->nr_queues; i++) {
1801                 struct auxtrace_queue *queue = &pt->queues.queue_array[i];
1802                 struct intel_pt_queue *ptq = queue->priv;
1803
1804                 if (ptq && (tid == -1 || ptq->tid == tid)) {
1805                         ptq->time = time_;
1806                         intel_pt_set_pid_tid_cpu(pt, queue);
1807                         intel_pt_run_decoder(ptq, &ts);
1808                 }
1809         }
1810         return 0;
1811 }
1812
1813 static int intel_pt_lost(struct intel_pt *pt, struct perf_sample *sample)
1814 {
1815         return intel_pt_synth_error(pt, INTEL_PT_ERR_LOST, sample->cpu,
1816                                     sample->pid, sample->tid, 0, sample->time);
1817 }
1818
1819 static struct intel_pt_queue *intel_pt_cpu_to_ptq(struct intel_pt *pt, int cpu)
1820 {
1821         unsigned i, j;
1822
1823         if (cpu < 0 || !pt->queues.nr_queues)
1824                 return NULL;
1825
1826         if ((unsigned)cpu >= pt->queues.nr_queues)
1827                 i = pt->queues.nr_queues - 1;
1828         else
1829                 i = cpu;
1830
1831         if (pt->queues.queue_array[i].cpu == cpu)
1832                 return pt->queues.queue_array[i].priv;
1833
1834         for (j = 0; i > 0; j++) {
1835                 if (pt->queues.queue_array[--i].cpu == cpu)
1836                         return pt->queues.queue_array[i].priv;
1837         }
1838
1839         for (; j < pt->queues.nr_queues; j++) {
1840                 if (pt->queues.queue_array[j].cpu == cpu)
1841                         return pt->queues.queue_array[j].priv;
1842         }
1843
1844         return NULL;
1845 }
1846
1847 static int intel_pt_sync_switch(struct intel_pt *pt, int cpu, pid_t tid,
1848                                 u64 timestamp)
1849 {
1850         struct intel_pt_queue *ptq;
1851         int err;
1852
1853         if (!pt->sync_switch)
1854                 return 1;
1855
1856         ptq = intel_pt_cpu_to_ptq(pt, cpu);
1857         if (!ptq || !ptq->sync_switch)
1858                 return 1;
1859
1860         switch (ptq->switch_state) {
1861         case INTEL_PT_SS_NOT_TRACING:
1862                 ptq->next_tid = -1;
1863                 break;
1864         case INTEL_PT_SS_UNKNOWN:
1865         case INTEL_PT_SS_TRACING:
1866                 ptq->next_tid = tid;
1867                 ptq->switch_state = INTEL_PT_SS_EXPECTING_SWITCH_IP;
1868                 return 0;
1869         case INTEL_PT_SS_EXPECTING_SWITCH_EVENT:
1870                 if (!ptq->on_heap) {
1871                         ptq->timestamp = perf_time_to_tsc(timestamp,
1872                                                           &pt->tc);
1873                         err = auxtrace_heap__add(&pt->heap, ptq->queue_nr,
1874                                                  ptq->timestamp);
1875                         if (err)
1876                                 return err;
1877                         ptq->on_heap = true;
1878                 }
1879                 ptq->switch_state = INTEL_PT_SS_TRACING;
1880                 break;
1881         case INTEL_PT_SS_EXPECTING_SWITCH_IP:
1882                 ptq->next_tid = tid;
1883                 intel_pt_log("ERROR: cpu %d expecting switch ip\n", cpu);
1884                 break;
1885         default:
1886                 break;
1887         }
1888
1889         return 1;
1890 }
1891
1892 static int intel_pt_process_switch(struct intel_pt *pt,
1893                                    struct perf_sample *sample)
1894 {
1895         struct perf_evsel *evsel;
1896         pid_t tid;
1897         int cpu, ret;
1898
1899         evsel = perf_evlist__id2evsel(pt->session->evlist, sample->id);
1900         if (evsel != pt->switch_evsel)
1901                 return 0;
1902
1903         tid = perf_evsel__intval(evsel, sample, "next_pid");
1904         cpu = sample->cpu;
1905
1906         intel_pt_log("sched_switch: cpu %d tid %d time %"PRIu64" tsc %#"PRIx64"\n",
1907                      cpu, tid, sample->time, perf_time_to_tsc(sample->time,
1908                      &pt->tc));
1909
1910         ret = intel_pt_sync_switch(pt, cpu, tid, sample->time);
1911         if (ret <= 0)
1912                 return ret;
1913
1914         return machine__set_current_tid(pt->machine, cpu, -1, tid);
1915 }
1916
1917 static int intel_pt_context_switch(struct intel_pt *pt, union perf_event *event,
1918                                    struct perf_sample *sample)
1919 {
1920         bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
1921         pid_t pid, tid;
1922         int cpu, ret;
1923
1924         cpu = sample->cpu;
1925
1926         if (pt->have_sched_switch == 3) {
1927                 if (!out)
1928                         return 0;
1929                 if (event->header.type != PERF_RECORD_SWITCH_CPU_WIDE) {
1930                         pr_err("Expecting CPU-wide context switch event\n");
1931                         return -EINVAL;
1932                 }
1933                 pid = event->context_switch.next_prev_pid;
1934                 tid = event->context_switch.next_prev_tid;
1935         } else {
1936                 if (out)
1937                         return 0;
1938                 pid = sample->pid;
1939                 tid = sample->tid;
1940         }
1941
1942         if (tid == -1) {
1943                 pr_err("context_switch event has no tid\n");
1944                 return -EINVAL;
1945         }
1946
1947         intel_pt_log("context_switch: cpu %d pid %d tid %d time %"PRIu64" tsc %#"PRIx64"\n",
1948                      cpu, pid, tid, sample->time, perf_time_to_tsc(sample->time,
1949                      &pt->tc));
1950
1951         ret = intel_pt_sync_switch(pt, cpu, tid, sample->time);
1952         if (ret <= 0)
1953                 return ret;
1954
1955         return machine__set_current_tid(pt->machine, cpu, pid, tid);
1956 }
1957
1958 static int intel_pt_process_itrace_start(struct intel_pt *pt,
1959                                          union perf_event *event,
1960                                          struct perf_sample *sample)
1961 {
1962         if (!pt->per_cpu_mmaps)
1963                 return 0;
1964
1965         intel_pt_log("itrace_start: cpu %d pid %d tid %d time %"PRIu64" tsc %#"PRIx64"\n",
1966                      sample->cpu, event->itrace_start.pid,
1967                      event->itrace_start.tid, sample->time,
1968                      perf_time_to_tsc(sample->time, &pt->tc));
1969
1970         return machine__set_current_tid(pt->machine, sample->cpu,
1971                                         event->itrace_start.pid,
1972                                         event->itrace_start.tid);
1973 }
1974
1975 static int intel_pt_process_event(struct perf_session *session,
1976                                   union perf_event *event,
1977                                   struct perf_sample *sample,
1978                                   struct perf_tool *tool)
1979 {
1980         struct intel_pt *pt = container_of(session->auxtrace, struct intel_pt,
1981                                            auxtrace);
1982         u64 timestamp;
1983         int err = 0;
1984
1985         if (dump_trace)
1986                 return 0;
1987
1988         if (!tool->ordered_events) {
1989                 pr_err("Intel Processor Trace requires ordered events\n");
1990                 return -EINVAL;
1991         }
1992
1993         if (sample->time && sample->time != (u64)-1)
1994                 timestamp = perf_time_to_tsc(sample->time, &pt->tc);
1995         else
1996                 timestamp = 0;
1997
1998         if (timestamp || pt->timeless_decoding) {
1999                 err = intel_pt_update_queues(pt);
2000                 if (err)
2001                         return err;
2002         }
2003
2004         if (pt->timeless_decoding) {
2005                 if (event->header.type == PERF_RECORD_EXIT) {
2006                         err = intel_pt_process_timeless_queues(pt,
2007                                                                event->fork.tid,
2008                                                                sample->time);
2009                 }
2010         } else if (timestamp) {
2011                 err = intel_pt_process_queues(pt, timestamp);
2012         }
2013         if (err)
2014                 return err;
2015
2016         if (event->header.type == PERF_RECORD_AUX &&
2017             (event->aux.flags & PERF_AUX_FLAG_TRUNCATED) &&
2018             pt->synth_opts.errors) {
2019                 err = intel_pt_lost(pt, sample);
2020                 if (err)
2021                         return err;
2022         }
2023
2024         if (pt->switch_evsel && event->header.type == PERF_RECORD_SAMPLE)
2025                 err = intel_pt_process_switch(pt, sample);
2026         else if (event->header.type == PERF_RECORD_ITRACE_START)
2027                 err = intel_pt_process_itrace_start(pt, event, sample);
2028         else if (event->header.type == PERF_RECORD_SWITCH ||
2029                  event->header.type == PERF_RECORD_SWITCH_CPU_WIDE)
2030                 err = intel_pt_context_switch(pt, event, sample);
2031
2032         intel_pt_log("event %u: cpu %d time %"PRIu64" tsc %#"PRIx64" ",
2033                      event->header.type, sample->cpu, sample->time, timestamp);
2034         intel_pt_log_event(event);
2035
2036         return err;
2037 }
2038
2039 static int intel_pt_flush(struct perf_session *session, struct perf_tool *tool)
2040 {
2041         struct intel_pt *pt = container_of(session->auxtrace, struct intel_pt,
2042                                            auxtrace);
2043         int ret;
2044
2045         if (dump_trace)
2046                 return 0;
2047
2048         if (!tool->ordered_events)
2049                 return -EINVAL;
2050
2051         ret = intel_pt_update_queues(pt);
2052         if (ret < 0)
2053                 return ret;
2054
2055         if (pt->timeless_decoding)
2056                 return intel_pt_process_timeless_queues(pt, -1,
2057                                                         MAX_TIMESTAMP - 1);
2058
2059         return intel_pt_process_queues(pt, MAX_TIMESTAMP);
2060 }
2061
2062 static void intel_pt_free_events(struct perf_session *session)
2063 {
2064         struct intel_pt *pt = container_of(session->auxtrace, struct intel_pt,
2065                                            auxtrace);
2066         struct auxtrace_queues *queues = &pt->queues;
2067         unsigned int i;
2068
2069         for (i = 0; i < queues->nr_queues; i++) {
2070                 intel_pt_free_queue(queues->queue_array[i].priv);
2071                 queues->queue_array[i].priv = NULL;
2072         }
2073         intel_pt_log_disable();
2074         auxtrace_queues__free(queues);
2075 }
2076
2077 static void intel_pt_free(struct perf_session *session)
2078 {
2079         struct intel_pt *pt = container_of(session->auxtrace, struct intel_pt,
2080                                            auxtrace);
2081
2082         auxtrace_heap__free(&pt->heap);
2083         intel_pt_free_events(session);
2084         session->auxtrace = NULL;
2085         thread__put(pt->unknown_thread);
2086         addr_filters__exit(&pt->filts);
2087         zfree(&pt->filter);
2088         free(pt);
2089 }
2090
2091 static int intel_pt_process_auxtrace_event(struct perf_session *session,
2092                                            union perf_event *event,
2093                                            struct perf_tool *tool __maybe_unused)
2094 {
2095         struct intel_pt *pt = container_of(session->auxtrace, struct intel_pt,
2096                                            auxtrace);
2097
2098         if (!pt->data_queued) {
2099                 struct auxtrace_buffer *buffer;
2100                 off_t data_offset;
2101                 int fd = perf_data__fd(session->data);
2102                 int err;
2103
2104                 if (perf_data__is_pipe(session->data)) {
2105                         data_offset = 0;
2106                 } else {
2107                         data_offset = lseek(fd, 0, SEEK_CUR);
2108                         if (data_offset == -1)
2109                                 return -errno;
2110                 }
2111
2112                 err = auxtrace_queues__add_event(&pt->queues, session, event,
2113                                                  data_offset, &buffer);
2114                 if (err)
2115                         return err;
2116
2117                 /* Dump here now we have copied a piped trace out of the pipe */
2118                 if (dump_trace) {
2119                         if (auxtrace_buffer__get_data(buffer, fd)) {
2120                                 intel_pt_dump_event(pt, buffer->data,
2121                                                     buffer->size);
2122                                 auxtrace_buffer__put_data(buffer);
2123                         }
2124                 }
2125         }
2126
2127         return 0;
2128 }
2129
2130 struct intel_pt_synth {
2131         struct perf_tool dummy_tool;
2132         struct perf_session *session;
2133 };
2134
2135 static int intel_pt_event_synth(struct perf_tool *tool,
2136                                 union perf_event *event,
2137                                 struct perf_sample *sample __maybe_unused,
2138                                 struct machine *machine __maybe_unused)
2139 {
2140         struct intel_pt_synth *intel_pt_synth =
2141                         container_of(tool, struct intel_pt_synth, dummy_tool);
2142
2143         return perf_session__deliver_synth_event(intel_pt_synth->session, event,
2144                                                  NULL);
2145 }
2146
2147 static int intel_pt_synth_event(struct perf_session *session, const char *name,
2148                                 struct perf_event_attr *attr, u64 id)
2149 {
2150         struct intel_pt_synth intel_pt_synth;
2151         int err;
2152
2153         pr_debug("Synthesizing '%s' event with id %" PRIu64 " sample type %#" PRIx64 "\n",
2154                  name, id, (u64)attr->sample_type);
2155
2156         memset(&intel_pt_synth, 0, sizeof(struct intel_pt_synth));
2157         intel_pt_synth.session = session;
2158
2159         err = perf_event__synthesize_attr(&intel_pt_synth.dummy_tool, attr, 1,
2160                                           &id, intel_pt_event_synth);
2161         if (err)
2162                 pr_err("%s: failed to synthesize '%s' event type\n",
2163                        __func__, name);
2164
2165         return err;
2166 }
2167
2168 static void intel_pt_set_event_name(struct perf_evlist *evlist, u64 id,
2169                                     const char *name)
2170 {
2171         struct perf_evsel *evsel;
2172
2173         evlist__for_each_entry(evlist, evsel) {
2174                 if (evsel->id && evsel->id[0] == id) {
2175                         if (evsel->name)
2176                                 zfree(&evsel->name);
2177                         evsel->name = strdup(name);
2178                         break;
2179                 }
2180         }
2181 }
2182
2183 static struct perf_evsel *intel_pt_evsel(struct intel_pt *pt,
2184                                          struct perf_evlist *evlist)
2185 {
2186         struct perf_evsel *evsel;
2187
2188         evlist__for_each_entry(evlist, evsel) {
2189                 if (evsel->attr.type == pt->pmu_type && evsel->ids)
2190                         return evsel;
2191         }
2192
2193         return NULL;
2194 }
2195
2196 static int intel_pt_synth_events(struct intel_pt *pt,
2197                                  struct perf_session *session)
2198 {
2199         struct perf_evlist *evlist = session->evlist;
2200         struct perf_evsel *evsel = intel_pt_evsel(pt, evlist);
2201         struct perf_event_attr attr;
2202         u64 id;
2203         int err;
2204
2205         if (!evsel) {
2206                 pr_debug("There are no selected events with Intel Processor Trace data\n");
2207                 return 0;
2208         }
2209
2210         memset(&attr, 0, sizeof(struct perf_event_attr));
2211         attr.size = sizeof(struct perf_event_attr);
2212         attr.type = PERF_TYPE_HARDWARE;
2213         attr.sample_type = evsel->attr.sample_type & PERF_SAMPLE_MASK;
2214         attr.sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID |
2215                             PERF_SAMPLE_PERIOD;
2216         if (pt->timeless_decoding)
2217                 attr.sample_type &= ~(u64)PERF_SAMPLE_TIME;
2218         else
2219                 attr.sample_type |= PERF_SAMPLE_TIME;
2220         if (!pt->per_cpu_mmaps)
2221                 attr.sample_type &= ~(u64)PERF_SAMPLE_CPU;
2222         attr.exclude_user = evsel->attr.exclude_user;
2223         attr.exclude_kernel = evsel->attr.exclude_kernel;
2224         attr.exclude_hv = evsel->attr.exclude_hv;
2225         attr.exclude_host = evsel->attr.exclude_host;
2226         attr.exclude_guest = evsel->attr.exclude_guest;
2227         attr.sample_id_all = evsel->attr.sample_id_all;
2228         attr.read_format = evsel->attr.read_format;
2229
2230         id = evsel->id[0] + 1000000000;
2231         if (!id)
2232                 id = 1;
2233
2234         if (pt->synth_opts.branches) {
2235                 attr.config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS;
2236                 attr.sample_period = 1;
2237                 attr.sample_type |= PERF_SAMPLE_ADDR;
2238                 err = intel_pt_synth_event(session, "branches", &attr, id);
2239                 if (err)
2240                         return err;
2241                 pt->sample_branches = true;
2242                 pt->branches_sample_type = attr.sample_type;
2243                 pt->branches_id = id;
2244                 id += 1;
2245                 attr.sample_type &= ~(u64)PERF_SAMPLE_ADDR;
2246         }
2247
2248         if (pt->synth_opts.callchain)
2249                 attr.sample_type |= PERF_SAMPLE_CALLCHAIN;
2250         if (pt->synth_opts.last_branch)
2251                 attr.sample_type |= PERF_SAMPLE_BRANCH_STACK;
2252
2253         if (pt->synth_opts.instructions) {
2254                 attr.config = PERF_COUNT_HW_INSTRUCTIONS;
2255                 if (pt->synth_opts.period_type == PERF_ITRACE_PERIOD_NANOSECS)
2256                         attr.sample_period =
2257                                 intel_pt_ns_to_ticks(pt, pt->synth_opts.period);
2258                 else
2259                         attr.sample_period = pt->synth_opts.period;
2260                 err = intel_pt_synth_event(session, "instructions", &attr, id);
2261                 if (err)
2262                         return err;
2263                 pt->sample_instructions = true;
2264                 pt->instructions_sample_type = attr.sample_type;
2265                 pt->instructions_id = id;
2266                 id += 1;
2267         }
2268
2269         attr.sample_type &= ~(u64)PERF_SAMPLE_PERIOD;
2270         attr.sample_period = 1;
2271
2272         if (pt->synth_opts.transactions) {
2273                 attr.config = PERF_COUNT_HW_INSTRUCTIONS;
2274                 err = intel_pt_synth_event(session, "transactions", &attr, id);
2275                 if (err)
2276                         return err;
2277                 pt->sample_transactions = true;
2278                 pt->transactions_sample_type = attr.sample_type;
2279                 pt->transactions_id = id;
2280                 intel_pt_set_event_name(evlist, id, "transactions");
2281                 id += 1;
2282         }
2283
2284         attr.type = PERF_TYPE_SYNTH;
2285         attr.sample_type |= PERF_SAMPLE_RAW;
2286
2287         if (pt->synth_opts.ptwrites) {
2288                 attr.config = PERF_SYNTH_INTEL_PTWRITE;
2289                 err = intel_pt_synth_event(session, "ptwrite", &attr, id);
2290                 if (err)
2291                         return err;
2292                 pt->sample_ptwrites = true;
2293                 pt->ptwrites_sample_type = attr.sample_type;
2294                 pt->ptwrites_id = id;
2295                 intel_pt_set_event_name(evlist, id, "ptwrite");
2296                 id += 1;
2297         }
2298
2299         if (pt->synth_opts.pwr_events) {
2300                 pt->sample_pwr_events = true;
2301                 pt->pwr_events_sample_type = attr.sample_type;
2302
2303                 attr.config = PERF_SYNTH_INTEL_CBR;
2304                 err = intel_pt_synth_event(session, "cbr", &attr, id);
2305                 if (err)
2306                         return err;
2307                 pt->cbr_id = id;
2308                 intel_pt_set_event_name(evlist, id, "cbr");
2309                 id += 1;
2310         }
2311
2312         if (pt->synth_opts.pwr_events && (evsel->attr.config & 0x10)) {
2313                 attr.config = PERF_SYNTH_INTEL_MWAIT;
2314                 err = intel_pt_synth_event(session, "mwait", &attr, id);
2315                 if (err)
2316                         return err;
2317                 pt->mwait_id = id;
2318                 intel_pt_set_event_name(evlist, id, "mwait");
2319                 id += 1;
2320
2321                 attr.config = PERF_SYNTH_INTEL_PWRE;
2322                 err = intel_pt_synth_event(session, "pwre", &attr, id);
2323                 if (err)
2324                         return err;
2325                 pt->pwre_id = id;
2326                 intel_pt_set_event_name(evlist, id, "pwre");
2327                 id += 1;
2328
2329                 attr.config = PERF_SYNTH_INTEL_EXSTOP;
2330                 err = intel_pt_synth_event(session, "exstop", &attr, id);
2331                 if (err)
2332                         return err;
2333                 pt->exstop_id = id;
2334                 intel_pt_set_event_name(evlist, id, "exstop");
2335                 id += 1;
2336
2337                 attr.config = PERF_SYNTH_INTEL_PWRX;
2338                 err = intel_pt_synth_event(session, "pwrx", &attr, id);
2339                 if (err)
2340                         return err;
2341                 pt->pwrx_id = id;
2342                 intel_pt_set_event_name(evlist, id, "pwrx");
2343                 id += 1;
2344         }
2345
2346         return 0;
2347 }
2348
2349 static struct perf_evsel *intel_pt_find_sched_switch(struct perf_evlist *evlist)
2350 {
2351         struct perf_evsel *evsel;
2352
2353         evlist__for_each_entry_reverse(evlist, evsel) {
2354                 const char *name = perf_evsel__name(evsel);
2355
2356                 if (!strcmp(name, "sched:sched_switch"))
2357                         return evsel;
2358         }
2359
2360         return NULL;
2361 }
2362
2363 static bool intel_pt_find_switch(struct perf_evlist *evlist)
2364 {
2365         struct perf_evsel *evsel;
2366
2367         evlist__for_each_entry(evlist, evsel) {
2368                 if (evsel->attr.context_switch)
2369                         return true;
2370         }
2371
2372         return false;
2373 }
2374
2375 static int intel_pt_perf_config(const char *var, const char *value, void *data)
2376 {
2377         struct intel_pt *pt = data;
2378
2379         if (!strcmp(var, "intel-pt.mispred-all"))
2380                 pt->mispred_all = perf_config_bool(var, value);
2381
2382         return 0;
2383 }
2384
2385 static const char * const intel_pt_info_fmts[] = {
2386         [INTEL_PT_PMU_TYPE]             = "  PMU Type            %"PRId64"\n",
2387         [INTEL_PT_TIME_SHIFT]           = "  Time Shift          %"PRIu64"\n",
2388         [INTEL_PT_TIME_MULT]            = "  Time Muliplier      %"PRIu64"\n",
2389         [INTEL_PT_TIME_ZERO]            = "  Time Zero           %"PRIu64"\n",
2390         [INTEL_PT_CAP_USER_TIME_ZERO]   = "  Cap Time Zero       %"PRId64"\n",
2391         [INTEL_PT_TSC_BIT]              = "  TSC bit             %#"PRIx64"\n",
2392         [INTEL_PT_NORETCOMP_BIT]        = "  NoRETComp bit       %#"PRIx64"\n",
2393         [INTEL_PT_HAVE_SCHED_SWITCH]    = "  Have sched_switch   %"PRId64"\n",
2394         [INTEL_PT_SNAPSHOT_MODE]        = "  Snapshot mode       %"PRId64"\n",
2395         [INTEL_PT_PER_CPU_MMAPS]        = "  Per-cpu maps        %"PRId64"\n",
2396         [INTEL_PT_MTC_BIT]              = "  MTC bit             %#"PRIx64"\n",
2397         [INTEL_PT_TSC_CTC_N]            = "  TSC:CTC numerator   %"PRIu64"\n",
2398         [INTEL_PT_TSC_CTC_D]            = "  TSC:CTC denominator %"PRIu64"\n",
2399         [INTEL_PT_CYC_BIT]              = "  CYC bit             %#"PRIx64"\n",
2400         [INTEL_PT_MAX_NONTURBO_RATIO]   = "  Max non-turbo ratio %"PRIu64"\n",
2401         [INTEL_PT_FILTER_STR_LEN]       = "  Filter string len.  %"PRIu64"\n",
2402 };
2403
2404 static void intel_pt_print_info(u64 *arr, int start, int finish)
2405 {
2406         int i;
2407
2408         if (!dump_trace)
2409                 return;
2410
2411         for (i = start; i <= finish; i++)
2412                 fprintf(stdout, intel_pt_info_fmts[i], arr[i]);
2413 }
2414
2415 static void intel_pt_print_info_str(const char *name, const char *str)
2416 {
2417         if (!dump_trace)
2418                 return;
2419
2420         fprintf(stdout, "  %-20s%s\n", name, str ? str : "");
2421 }
2422
2423 static bool intel_pt_has(struct auxtrace_info_event *auxtrace_info, int pos)
2424 {
2425         return auxtrace_info->header.size >=
2426                 sizeof(struct auxtrace_info_event) + (sizeof(u64) * (pos + 1));
2427 }
2428
2429 int intel_pt_process_auxtrace_info(union perf_event *event,
2430                                    struct perf_session *session)
2431 {
2432         struct auxtrace_info_event *auxtrace_info = &event->auxtrace_info;
2433         size_t min_sz = sizeof(u64) * INTEL_PT_PER_CPU_MMAPS;
2434         struct intel_pt *pt;
2435         void *info_end;
2436         u64 *info;
2437         int err;
2438
2439         if (auxtrace_info->header.size < sizeof(struct auxtrace_info_event) +
2440                                         min_sz)
2441                 return -EINVAL;
2442
2443         pt = zalloc(sizeof(struct intel_pt));
2444         if (!pt)
2445                 return -ENOMEM;
2446
2447         addr_filters__init(&pt->filts);
2448
2449         err = perf_config(intel_pt_perf_config, pt);
2450         if (err)
2451                 goto err_free;
2452
2453         err = auxtrace_queues__init(&pt->queues);
2454         if (err)
2455                 goto err_free;
2456
2457         intel_pt_log_set_name(INTEL_PT_PMU_NAME);
2458
2459         pt->session = session;
2460         pt->machine = &session->machines.host; /* No kvm support */
2461         pt->auxtrace_type = auxtrace_info->type;
2462         pt->pmu_type = auxtrace_info->priv[INTEL_PT_PMU_TYPE];
2463         pt->tc.time_shift = auxtrace_info->priv[INTEL_PT_TIME_SHIFT];
2464         pt->tc.time_mult = auxtrace_info->priv[INTEL_PT_TIME_MULT];
2465         pt->tc.time_zero = auxtrace_info->priv[INTEL_PT_TIME_ZERO];
2466         pt->cap_user_time_zero = auxtrace_info->priv[INTEL_PT_CAP_USER_TIME_ZERO];
2467         pt->tsc_bit = auxtrace_info->priv[INTEL_PT_TSC_BIT];
2468         pt->noretcomp_bit = auxtrace_info->priv[INTEL_PT_NORETCOMP_BIT];
2469         pt->have_sched_switch = auxtrace_info->priv[INTEL_PT_HAVE_SCHED_SWITCH];
2470         pt->snapshot_mode = auxtrace_info->priv[INTEL_PT_SNAPSHOT_MODE];
2471         pt->per_cpu_mmaps = auxtrace_info->priv[INTEL_PT_PER_CPU_MMAPS];
2472         intel_pt_print_info(&auxtrace_info->priv[0], INTEL_PT_PMU_TYPE,
2473                             INTEL_PT_PER_CPU_MMAPS);
2474
2475         if (intel_pt_has(auxtrace_info, INTEL_PT_CYC_BIT)) {
2476                 pt->mtc_bit = auxtrace_info->priv[INTEL_PT_MTC_BIT];
2477                 pt->mtc_freq_bits = auxtrace_info->priv[INTEL_PT_MTC_FREQ_BITS];
2478                 pt->tsc_ctc_ratio_n = auxtrace_info->priv[INTEL_PT_TSC_CTC_N];
2479                 pt->tsc_ctc_ratio_d = auxtrace_info->priv[INTEL_PT_TSC_CTC_D];
2480                 pt->cyc_bit = auxtrace_info->priv[INTEL_PT_CYC_BIT];
2481                 intel_pt_print_info(&auxtrace_info->priv[0], INTEL_PT_MTC_BIT,
2482                                     INTEL_PT_CYC_BIT);
2483         }
2484
2485         if (intel_pt_has(auxtrace_info, INTEL_PT_MAX_NONTURBO_RATIO)) {
2486                 pt->max_non_turbo_ratio =
2487                         auxtrace_info->priv[INTEL_PT_MAX_NONTURBO_RATIO];
2488                 intel_pt_print_info(&auxtrace_info->priv[0],
2489                                     INTEL_PT_MAX_NONTURBO_RATIO,
2490                                     INTEL_PT_MAX_NONTURBO_RATIO);
2491         }
2492
2493         info = &auxtrace_info->priv[INTEL_PT_FILTER_STR_LEN] + 1;
2494         info_end = (void *)info + auxtrace_info->header.size;
2495
2496         if (intel_pt_has(auxtrace_info, INTEL_PT_FILTER_STR_LEN)) {
2497                 size_t len;
2498
2499                 len = auxtrace_info->priv[INTEL_PT_FILTER_STR_LEN];
2500                 intel_pt_print_info(&auxtrace_info->priv[0],
2501                                     INTEL_PT_FILTER_STR_LEN,
2502                                     INTEL_PT_FILTER_STR_LEN);
2503                 if (len) {
2504                         const char *filter = (const char *)info;
2505
2506                         len = roundup(len + 1, 8);
2507                         info += len >> 3;
2508                         if ((void *)info > info_end) {
2509                                 pr_err("%s: bad filter string length\n", __func__);
2510                                 err = -EINVAL;
2511                                 goto err_free_queues;
2512                         }
2513                         pt->filter = memdup(filter, len);
2514                         if (!pt->filter) {
2515                                 err = -ENOMEM;
2516                                 goto err_free_queues;
2517                         }
2518                         if (session->header.needs_swap)
2519                                 mem_bswap_64(pt->filter, len);
2520                         if (pt->filter[len - 1]) {
2521                                 pr_err("%s: filter string not null terminated\n", __func__);
2522                                 err = -EINVAL;
2523                                 goto err_free_queues;
2524                         }
2525                         err = addr_filters__parse_bare_filter(&pt->filts,
2526                                                               filter);
2527                         if (err)
2528                                 goto err_free_queues;
2529                 }
2530                 intel_pt_print_info_str("Filter string", pt->filter);
2531         }
2532
2533         pt->timeless_decoding = intel_pt_timeless_decoding(pt);
2534         if (pt->timeless_decoding && !pt->tc.time_mult)
2535                 pt->tc.time_mult = 1;
2536         pt->have_tsc = intel_pt_have_tsc(pt);
2537         pt->sampling_mode = false;
2538         pt->est_tsc = !pt->timeless_decoding;
2539
2540         pt->unknown_thread = thread__new(999999999, 999999999);
2541         if (!pt->unknown_thread) {
2542                 err = -ENOMEM;
2543                 goto err_free_queues;
2544         }
2545
2546         /*
2547          * Since this thread will not be kept in any rbtree not in a
2548          * list, initialize its list node so that at thread__put() the
2549          * current thread lifetime assuption is kept and we don't segfault
2550          * at list_del_init().
2551          */
2552         INIT_LIST_HEAD(&pt->unknown_thread->node);
2553
2554         err = thread__set_comm(pt->unknown_thread, "unknown", 0);
2555         if (err)
2556                 goto err_delete_thread;
2557         if (thread__init_map_groups(pt->unknown_thread, pt->machine)) {
2558                 err = -ENOMEM;
2559                 goto err_delete_thread;
2560         }
2561
2562         pt->auxtrace.process_event = intel_pt_process_event;
2563         pt->auxtrace.process_auxtrace_event = intel_pt_process_auxtrace_event;
2564         pt->auxtrace.flush_events = intel_pt_flush;
2565         pt->auxtrace.free_events = intel_pt_free_events;
2566         pt->auxtrace.free = intel_pt_free;
2567         session->auxtrace = &pt->auxtrace;
2568
2569         if (dump_trace)
2570                 return 0;
2571
2572         if (pt->have_sched_switch == 1) {
2573                 pt->switch_evsel = intel_pt_find_sched_switch(session->evlist);
2574                 if (!pt->switch_evsel) {
2575                         pr_err("%s: missing sched_switch event\n", __func__);
2576                         err = -EINVAL;
2577                         goto err_delete_thread;
2578                 }
2579         } else if (pt->have_sched_switch == 2 &&
2580                    !intel_pt_find_switch(session->evlist)) {
2581                 pr_err("%s: missing context_switch attribute flag\n", __func__);
2582                 err = -EINVAL;
2583                 goto err_delete_thread;
2584         }
2585
2586         if (session->itrace_synth_opts && session->itrace_synth_opts->set) {
2587                 pt->synth_opts = *session->itrace_synth_opts;
2588         } else {
2589                 itrace_synth_opts__set_default(&pt->synth_opts,
2590                                 session->itrace_synth_opts->default_no_sample);
2591                 if (use_browser != -1) {
2592                         pt->synth_opts.branches = false;
2593                         pt->synth_opts.callchain = true;
2594                 }
2595                 if (session->itrace_synth_opts)
2596                         pt->synth_opts.thread_stack =
2597                                 session->itrace_synth_opts->thread_stack;
2598         }
2599
2600         if (pt->synth_opts.log)
2601                 intel_pt_log_enable();
2602
2603         /* Maximum non-turbo ratio is TSC freq / 100 MHz */
2604         if (pt->tc.time_mult) {
2605                 u64 tsc_freq = intel_pt_ns_to_ticks(pt, 1000000000);
2606
2607                 if (!pt->max_non_turbo_ratio)
2608                         pt->max_non_turbo_ratio =
2609                                         (tsc_freq + 50000000) / 100000000;
2610                 intel_pt_log("TSC frequency %"PRIu64"\n", tsc_freq);
2611                 intel_pt_log("Maximum non-turbo ratio %u\n",
2612                              pt->max_non_turbo_ratio);
2613                 pt->cbr2khz = tsc_freq / pt->max_non_turbo_ratio / 1000;
2614         }
2615
2616         if (pt->synth_opts.calls)
2617                 pt->branches_filter |= PERF_IP_FLAG_CALL | PERF_IP_FLAG_ASYNC |
2618                                        PERF_IP_FLAG_TRACE_END;
2619         if (pt->synth_opts.returns)
2620                 pt->branches_filter |= PERF_IP_FLAG_RETURN |
2621                                        PERF_IP_FLAG_TRACE_BEGIN;
2622
2623         if (pt->synth_opts.callchain && !symbol_conf.use_callchain) {
2624                 symbol_conf.use_callchain = true;
2625                 if (callchain_register_param(&callchain_param) < 0) {
2626                         symbol_conf.use_callchain = false;
2627                         pt->synth_opts.callchain = false;
2628                 }
2629         }
2630
2631         err = intel_pt_synth_events(pt, session);
2632         if (err)
2633                 goto err_delete_thread;
2634
2635         err = auxtrace_queues__process_index(&pt->queues, session);
2636         if (err)
2637                 goto err_delete_thread;
2638
2639         if (pt->queues.populated)
2640                 pt->data_queued = true;
2641
2642         if (pt->timeless_decoding)
2643                 pr_debug2("Intel PT decoding without timestamps\n");
2644
2645         return 0;
2646
2647 err_delete_thread:
2648         thread__zput(pt->unknown_thread);
2649 err_free_queues:
2650         intel_pt_log_disable();
2651         auxtrace_queues__free(&pt->queues);
2652         session->auxtrace = NULL;
2653 err_free:
2654         addr_filters__exit(&pt->filts);
2655         zfree(&pt->filter);
2656         free(pt);
2657         return err;
2658 }