1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/list.h> 3 #include <linux/compiler.h> 4 #include <linux/string.h> 5 #include <linux/zalloc.h> 6 #include <subcmd/pager.h> 7 #include <sys/types.h> 8 #include <errno.h> 9 #include <fcntl.h> 10 #include <sys/stat.h> 11 #include <unistd.h> 12 #include <stdio.h> 13 #include <stdbool.h> 14 #include <stdarg.h> 15 #include <dirent.h> 16 #include <api/fs/fs.h> 17 #include <locale.h> 18 #include <regex.h> 19 #include <perf/cpumap.h> 20 #include "debug.h" 21 #include "evsel.h" 22 #include "pmu.h" 23 #include "parse-events.h" 24 #include "header.h" 25 #include "string2.h" 26 #include "strbuf.h" 27 #include "fncache.h" 28 29 struct perf_pmu perf_pmu__fake; 30 31 struct perf_pmu_format { 32 char *name; 33 int value; 34 DECLARE_BITMAP(bits, PERF_PMU_FORMAT_BITS); 35 struct list_head list; 36 }; 37 38 int perf_pmu_parse(struct list_head *list, char *name); 39 extern FILE *perf_pmu_in; 40 41 static LIST_HEAD(pmus); 42 43 /* 44 * Parse & process all the sysfs attributes located under 45 * the directory specified in 'dir' parameter. 46 */ 47 int perf_pmu__format_parse(char *dir, struct list_head *head) 48 { 49 struct dirent *evt_ent; 50 DIR *format_dir; 51 int ret = 0; 52 53 format_dir = opendir(dir); 54 if (!format_dir) 55 return -EINVAL; 56 57 while (!ret && (evt_ent = readdir(format_dir))) { 58 char path[PATH_MAX]; 59 char *name = evt_ent->d_name; 60 FILE *file; 61 62 if (!strcmp(name, ".") || !strcmp(name, "..")) 63 continue; 64 65 snprintf(path, PATH_MAX, "%s/%s", dir, name); 66 67 ret = -EINVAL; 68 file = fopen(path, "r"); 69 if (!file) 70 break; 71 72 perf_pmu_in = file; 73 ret = perf_pmu_parse(head, name); 74 fclose(file); 75 } 76 77 closedir(format_dir); 78 return ret; 79 } 80 81 /* 82 * Reading/parsing the default pmu format definition, which should be 83 * located at: 84 * /sys/bus/event_source/devices/<dev>/format as sysfs group attributes. 85 */ 86 static int pmu_format(const char *name, struct list_head *format) 87 { 88 char path[PATH_MAX]; 89 const char *sysfs = sysfs__mountpoint(); 90 91 if (!sysfs) 92 return -1; 93 94 snprintf(path, PATH_MAX, 95 "%s" EVENT_SOURCE_DEVICE_PATH "%s/format", sysfs, name); 96 97 if (!file_available(path)) 98 return 0; 99 100 if (perf_pmu__format_parse(path, format)) 101 return -1; 102 103 return 0; 104 } 105 106 int perf_pmu__convert_scale(const char *scale, char **end, double *sval) 107 { 108 char *lc; 109 int ret = 0; 110 111 /* 112 * save current locale 113 */ 114 lc = setlocale(LC_NUMERIC, NULL); 115 116 /* 117 * The lc string may be allocated in static storage, 118 * so get a dynamic copy to make it survive setlocale 119 * call below. 120 */ 121 lc = strdup(lc); 122 if (!lc) { 123 ret = -ENOMEM; 124 goto out; 125 } 126 127 /* 128 * force to C locale to ensure kernel 129 * scale string is converted correctly. 130 * kernel uses default C locale. 131 */ 132 setlocale(LC_NUMERIC, "C"); 133 134 *sval = strtod(scale, end); 135 136 out: 137 /* restore locale */ 138 setlocale(LC_NUMERIC, lc); 139 free(lc); 140 return ret; 141 } 142 143 static int perf_pmu__parse_scale(struct perf_pmu_alias *alias, char *dir, char *name) 144 { 145 struct stat st; 146 ssize_t sret; 147 char scale[128]; 148 int fd, ret = -1; 149 char path[PATH_MAX]; 150 151 scnprintf(path, PATH_MAX, "%s/%s.scale", dir, name); 152 153 fd = open(path, O_RDONLY); 154 if (fd == -1) 155 return -1; 156 157 if (fstat(fd, &st) < 0) 158 goto error; 159 160 sret = read(fd, scale, sizeof(scale)-1); 161 if (sret < 0) 162 goto error; 163 164 if (scale[sret - 1] == '\n') 165 scale[sret - 1] = '\0'; 166 else 167 scale[sret] = '\0'; 168 169 ret = perf_pmu__convert_scale(scale, NULL, &alias->scale); 170 error: 171 close(fd); 172 return ret; 173 } 174 175 static int perf_pmu__parse_unit(struct perf_pmu_alias *alias, char *dir, char *name) 176 { 177 char path[PATH_MAX]; 178 ssize_t sret; 179 int fd; 180 181 scnprintf(path, PATH_MAX, "%s/%s.unit", dir, name); 182 183 fd = open(path, O_RDONLY); 184 if (fd == -1) 185 return -1; 186 187 sret = read(fd, alias->unit, UNIT_MAX_LEN); 188 if (sret < 0) 189 goto error; 190 191 close(fd); 192 193 if (alias->unit[sret - 1] == '\n') 194 alias->unit[sret - 1] = '\0'; 195 else 196 alias->unit[sret] = '\0'; 197 198 return 0; 199 error: 200 close(fd); 201 alias->unit[0] = '\0'; 202 return -1; 203 } 204 205 static int 206 perf_pmu__parse_per_pkg(struct perf_pmu_alias *alias, char *dir, char *name) 207 { 208 char path[PATH_MAX]; 209 int fd; 210 211 scnprintf(path, PATH_MAX, "%s/%s.per-pkg", dir, name); 212 213 fd = open(path, O_RDONLY); 214 if (fd == -1) 215 return -1; 216 217 close(fd); 218 219 alias->per_pkg = true; 220 return 0; 221 } 222 223 static int perf_pmu__parse_snapshot(struct perf_pmu_alias *alias, 224 char *dir, char *name) 225 { 226 char path[PATH_MAX]; 227 int fd; 228 229 scnprintf(path, PATH_MAX, "%s/%s.snapshot", dir, name); 230 231 fd = open(path, O_RDONLY); 232 if (fd == -1) 233 return -1; 234 235 alias->snapshot = true; 236 close(fd); 237 return 0; 238 } 239 240 static void perf_pmu_assign_str(char *name, const char *field, char **old_str, 241 char **new_str) 242 { 243 if (!*old_str) 244 goto set_new; 245 246 if (*new_str) { /* Have new string, check with old */ 247 if (strcasecmp(*old_str, *new_str)) 248 pr_debug("alias %s differs in field '%s'\n", 249 name, field); 250 zfree(old_str); 251 } else /* Nothing new --> keep old string */ 252 return; 253 set_new: 254 *old_str = *new_str; 255 *new_str = NULL; 256 } 257 258 static void perf_pmu_update_alias(struct perf_pmu_alias *old, 259 struct perf_pmu_alias *newalias) 260 { 261 perf_pmu_assign_str(old->name, "desc", &old->desc, &newalias->desc); 262 perf_pmu_assign_str(old->name, "long_desc", &old->long_desc, 263 &newalias->long_desc); 264 perf_pmu_assign_str(old->name, "topic", &old->topic, &newalias->topic); 265 perf_pmu_assign_str(old->name, "metric_expr", &old->metric_expr, 266 &newalias->metric_expr); 267 perf_pmu_assign_str(old->name, "metric_name", &old->metric_name, 268 &newalias->metric_name); 269 perf_pmu_assign_str(old->name, "value", &old->str, &newalias->str); 270 old->scale = newalias->scale; 271 old->per_pkg = newalias->per_pkg; 272 old->snapshot = newalias->snapshot; 273 memcpy(old->unit, newalias->unit, sizeof(old->unit)); 274 } 275 276 /* Delete an alias entry. */ 277 void perf_pmu_free_alias(struct perf_pmu_alias *newalias) 278 { 279 zfree(&newalias->name); 280 zfree(&newalias->desc); 281 zfree(&newalias->long_desc); 282 zfree(&newalias->topic); 283 zfree(&newalias->str); 284 zfree(&newalias->metric_expr); 285 zfree(&newalias->metric_name); 286 parse_events_terms__purge(&newalias->terms); 287 free(newalias); 288 } 289 290 /* Merge an alias, search in alias list. If this name is already 291 * present merge both of them to combine all information. 292 */ 293 static bool perf_pmu_merge_alias(struct perf_pmu_alias *newalias, 294 struct list_head *alist) 295 { 296 struct perf_pmu_alias *a; 297 298 list_for_each_entry(a, alist, list) { 299 if (!strcasecmp(newalias->name, a->name)) { 300 perf_pmu_update_alias(a, newalias); 301 perf_pmu_free_alias(newalias); 302 return true; 303 } 304 } 305 return false; 306 } 307 308 static int __perf_pmu__new_alias(struct list_head *list, char *dir, char *name, 309 char *desc, char *val, 310 char *long_desc, char *topic, 311 char *unit, char *perpkg, 312 char *metric_expr, 313 char *metric_name, 314 char *deprecated) 315 { 316 struct parse_events_term *term; 317 struct perf_pmu_alias *alias; 318 int ret; 319 int num; 320 char newval[256]; 321 322 alias = malloc(sizeof(*alias)); 323 if (!alias) 324 return -ENOMEM; 325 326 INIT_LIST_HEAD(&alias->terms); 327 alias->scale = 1.0; 328 alias->unit[0] = '\0'; 329 alias->per_pkg = false; 330 alias->snapshot = false; 331 alias->deprecated = false; 332 333 ret = parse_events_terms(&alias->terms, val); 334 if (ret) { 335 pr_err("Cannot parse alias %s: %d\n", val, ret); 336 free(alias); 337 return ret; 338 } 339 340 /* Scan event and remove leading zeroes, spaces, newlines, some 341 * platforms have terms specified as 342 * event=0x0091 (read from files ../<PMU>/events/<FILE> 343 * and terms specified as event=0x91 (read from JSON files). 344 * 345 * Rebuild string to make alias->str member comparable. 346 */ 347 memset(newval, 0, sizeof(newval)); 348 ret = 0; 349 list_for_each_entry(term, &alias->terms, list) { 350 if (ret) 351 ret += scnprintf(newval + ret, sizeof(newval) - ret, 352 ","); 353 if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) 354 ret += scnprintf(newval + ret, sizeof(newval) - ret, 355 "%s=%#x", term->config, term->val.num); 356 else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) 357 ret += scnprintf(newval + ret, sizeof(newval) - ret, 358 "%s=%s", term->config, term->val.str); 359 } 360 361 alias->name = strdup(name); 362 if (dir) { 363 /* 364 * load unit name and scale if available 365 */ 366 perf_pmu__parse_unit(alias, dir, name); 367 perf_pmu__parse_scale(alias, dir, name); 368 perf_pmu__parse_per_pkg(alias, dir, name); 369 perf_pmu__parse_snapshot(alias, dir, name); 370 } 371 372 alias->metric_expr = metric_expr ? strdup(metric_expr) : NULL; 373 alias->metric_name = metric_name ? strdup(metric_name): NULL; 374 alias->desc = desc ? strdup(desc) : NULL; 375 alias->long_desc = long_desc ? strdup(long_desc) : 376 desc ? strdup(desc) : NULL; 377 alias->topic = topic ? strdup(topic) : NULL; 378 if (unit) { 379 if (perf_pmu__convert_scale(unit, &unit, &alias->scale) < 0) 380 return -1; 381 snprintf(alias->unit, sizeof(alias->unit), "%s", unit); 382 } 383 alias->per_pkg = perpkg && sscanf(perpkg, "%d", &num) == 1 && num == 1; 384 alias->str = strdup(newval); 385 386 if (deprecated) 387 alias->deprecated = true; 388 389 if (!perf_pmu_merge_alias(alias, list)) 390 list_add_tail(&alias->list, list); 391 392 return 0; 393 } 394 395 static int perf_pmu__new_alias(struct list_head *list, char *dir, char *name, FILE *file) 396 { 397 char buf[256]; 398 int ret; 399 400 ret = fread(buf, 1, sizeof(buf), file); 401 if (ret == 0) 402 return -EINVAL; 403 404 buf[ret] = 0; 405 406 /* Remove trailing newline from sysfs file */ 407 strim(buf); 408 409 return __perf_pmu__new_alias(list, dir, name, NULL, buf, NULL, NULL, NULL, 410 NULL, NULL, NULL, NULL); 411 } 412 413 static inline bool pmu_alias_info_file(char *name) 414 { 415 size_t len; 416 417 len = strlen(name); 418 if (len > 5 && !strcmp(name + len - 5, ".unit")) 419 return true; 420 if (len > 6 && !strcmp(name + len - 6, ".scale")) 421 return true; 422 if (len > 8 && !strcmp(name + len - 8, ".per-pkg")) 423 return true; 424 if (len > 9 && !strcmp(name + len - 9, ".snapshot")) 425 return true; 426 427 return false; 428 } 429 430 /* 431 * Process all the sysfs attributes located under the directory 432 * specified in 'dir' parameter. 433 */ 434 static int pmu_aliases_parse(char *dir, struct list_head *head) 435 { 436 struct dirent *evt_ent; 437 DIR *event_dir; 438 439 event_dir = opendir(dir); 440 if (!event_dir) 441 return -EINVAL; 442 443 while ((evt_ent = readdir(event_dir))) { 444 char path[PATH_MAX]; 445 char *name = evt_ent->d_name; 446 FILE *file; 447 448 if (!strcmp(name, ".") || !strcmp(name, "..")) 449 continue; 450 451 /* 452 * skip info files parsed in perf_pmu__new_alias() 453 */ 454 if (pmu_alias_info_file(name)) 455 continue; 456 457 scnprintf(path, PATH_MAX, "%s/%s", dir, name); 458 459 file = fopen(path, "r"); 460 if (!file) { 461 pr_debug("Cannot open %s\n", path); 462 continue; 463 } 464 465 if (perf_pmu__new_alias(head, dir, name, file) < 0) 466 pr_debug("Cannot set up %s\n", name); 467 fclose(file); 468 } 469 470 closedir(event_dir); 471 return 0; 472 } 473 474 /* 475 * Reading the pmu event aliases definition, which should be located at: 476 * /sys/bus/event_source/devices/<dev>/events as sysfs group attributes. 477 */ 478 static int pmu_aliases(const char *name, struct list_head *head) 479 { 480 char path[PATH_MAX]; 481 const char *sysfs = sysfs__mountpoint(); 482 483 if (!sysfs) 484 return -1; 485 486 snprintf(path, PATH_MAX, 487 "%s/bus/event_source/devices/%s/events", sysfs, name); 488 489 if (!file_available(path)) 490 return 0; 491 492 if (pmu_aliases_parse(path, head)) 493 return -1; 494 495 return 0; 496 } 497 498 static int pmu_alias_terms(struct perf_pmu_alias *alias, 499 struct list_head *terms) 500 { 501 struct parse_events_term *term, *cloned; 502 LIST_HEAD(list); 503 int ret; 504 505 list_for_each_entry(term, &alias->terms, list) { 506 ret = parse_events_term__clone(&cloned, term); 507 if (ret) { 508 parse_events_terms__purge(&list); 509 return ret; 510 } 511 /* 512 * Weak terms don't override command line options, 513 * which we don't want for implicit terms in aliases. 514 */ 515 cloned->weak = true; 516 list_add_tail(&cloned->list, &list); 517 } 518 list_splice(&list, terms); 519 return 0; 520 } 521 522 /* 523 * Reading/parsing the default pmu type value, which should be 524 * located at: 525 * /sys/bus/event_source/devices/<dev>/type as sysfs attribute. 526 */ 527 static int pmu_type(const char *name, __u32 *type) 528 { 529 char path[PATH_MAX]; 530 FILE *file; 531 int ret = 0; 532 const char *sysfs = sysfs__mountpoint(); 533 534 if (!sysfs) 535 return -1; 536 537 snprintf(path, PATH_MAX, 538 "%s" EVENT_SOURCE_DEVICE_PATH "%s/type", sysfs, name); 539 540 if (access(path, R_OK) < 0) 541 return -1; 542 543 file = fopen(path, "r"); 544 if (!file) 545 return -EINVAL; 546 547 if (1 != fscanf(file, "%u", type)) 548 ret = -1; 549 550 fclose(file); 551 return ret; 552 } 553 554 /* Add all pmus in sysfs to pmu list: */ 555 static void pmu_read_sysfs(void) 556 { 557 char path[PATH_MAX]; 558 DIR *dir; 559 struct dirent *dent; 560 const char *sysfs = sysfs__mountpoint(); 561 562 if (!sysfs) 563 return; 564 565 snprintf(path, PATH_MAX, 566 "%s" EVENT_SOURCE_DEVICE_PATH, sysfs); 567 568 dir = opendir(path); 569 if (!dir) 570 return; 571 572 while ((dent = readdir(dir))) { 573 if (!strcmp(dent->d_name, ".") || !strcmp(dent->d_name, "..")) 574 continue; 575 /* add to static LIST_HEAD(pmus): */ 576 perf_pmu__find(dent->d_name); 577 } 578 579 closedir(dir); 580 } 581 582 static struct perf_cpu_map *__pmu_cpumask(const char *path) 583 { 584 FILE *file; 585 struct perf_cpu_map *cpus; 586 587 file = fopen(path, "r"); 588 if (!file) 589 return NULL; 590 591 cpus = perf_cpu_map__read(file); 592 fclose(file); 593 return cpus; 594 } 595 596 /* 597 * Uncore PMUs have a "cpumask" file under sysfs. CPU PMUs (e.g. on arm/arm64) 598 * may have a "cpus" file. 599 */ 600 #define SYS_TEMPLATE_ID "./bus/event_source/devices/%s/identifier" 601 #define CPUS_TEMPLATE_UNCORE "%s/bus/event_source/devices/%s/cpumask" 602 #define CPUS_TEMPLATE_CPU "%s/bus/event_source/devices/%s/cpus" 603 604 static struct perf_cpu_map *pmu_cpumask(const char *name) 605 { 606 char path[PATH_MAX]; 607 struct perf_cpu_map *cpus; 608 const char *sysfs = sysfs__mountpoint(); 609 const char *templates[] = { 610 CPUS_TEMPLATE_UNCORE, 611 CPUS_TEMPLATE_CPU, 612 NULL 613 }; 614 const char **template; 615 616 if (!sysfs) 617 return NULL; 618 619 for (template = templates; *template; template++) { 620 snprintf(path, PATH_MAX, *template, sysfs, name); 621 cpus = __pmu_cpumask(path); 622 if (cpus) 623 return cpus; 624 } 625 626 return NULL; 627 } 628 629 static bool pmu_is_uncore(const char *name) 630 { 631 char path[PATH_MAX]; 632 const char *sysfs; 633 634 sysfs = sysfs__mountpoint(); 635 snprintf(path, PATH_MAX, CPUS_TEMPLATE_UNCORE, sysfs, name); 636 return file_available(path); 637 } 638 639 static char *pmu_id(const char *name) 640 { 641 char path[PATH_MAX], *str; 642 size_t len; 643 644 snprintf(path, PATH_MAX, SYS_TEMPLATE_ID, name); 645 646 if (sysfs__read_str(path, &str, &len) < 0) 647 return NULL; 648 649 str[len - 1] = 0; /* remove line feed */ 650 651 return str; 652 } 653 654 /* 655 * PMU CORE devices have different name other than cpu in sysfs on some 656 * platforms. 657 * Looking for possible sysfs files to identify the arm core device. 658 */ 659 static int is_arm_pmu_core(const char *name) 660 { 661 char path[PATH_MAX]; 662 const char *sysfs = sysfs__mountpoint(); 663 664 if (!sysfs) 665 return 0; 666 667 /* Look for cpu sysfs (specific to arm) */ 668 scnprintf(path, PATH_MAX, "%s/bus/event_source/devices/%s/cpus", 669 sysfs, name); 670 return file_available(path); 671 } 672 673 static char *perf_pmu__getcpuid(struct perf_pmu *pmu) 674 { 675 char *cpuid; 676 static bool printed; 677 678 cpuid = getenv("PERF_CPUID"); 679 if (cpuid) 680 cpuid = strdup(cpuid); 681 if (!cpuid) 682 cpuid = get_cpuid_str(pmu); 683 if (!cpuid) 684 return NULL; 685 686 if (!printed) { 687 pr_debug("Using CPUID %s\n", cpuid); 688 printed = true; 689 } 690 return cpuid; 691 } 692 693 struct pmu_events_map *perf_pmu__find_map(struct perf_pmu *pmu) 694 { 695 struct pmu_events_map *map; 696 char *cpuid = perf_pmu__getcpuid(pmu); 697 int i; 698 699 /* on some platforms which uses cpus map, cpuid can be NULL for 700 * PMUs other than CORE PMUs. 701 */ 702 if (!cpuid) 703 return NULL; 704 705 i = 0; 706 for (;;) { 707 map = &pmu_events_map[i++]; 708 if (!map->table) { 709 map = NULL; 710 break; 711 } 712 713 if (!strcmp_cpuid_str(map->cpuid, cpuid)) 714 break; 715 } 716 free(cpuid); 717 return map; 718 } 719 720 bool pmu_uncore_alias_match(const char *pmu_name, const char *name) 721 { 722 char *tmp = NULL, *tok, *str; 723 bool res; 724 725 str = strdup(pmu_name); 726 if (!str) 727 return false; 728 729 /* 730 * uncore alias may be from different PMU with common prefix 731 */ 732 tok = strtok_r(str, ",", &tmp); 733 if (strncmp(pmu_name, tok, strlen(tok))) { 734 res = false; 735 goto out; 736 } 737 738 /* 739 * Match more complex aliases where the alias name is a comma-delimited 740 * list of tokens, orderly contained in the matching PMU name. 741 * 742 * Example: For alias "socket,pmuname" and PMU "socketX_pmunameY", we 743 * match "socket" in "socketX_pmunameY" and then "pmuname" in 744 * "pmunameY". 745 */ 746 for (; tok; name += strlen(tok), tok = strtok_r(NULL, ",", &tmp)) { 747 name = strstr(name, tok); 748 if (!name) { 749 res = false; 750 goto out; 751 } 752 } 753 754 res = true; 755 out: 756 free(str); 757 return res; 758 } 759 760 /* 761 * From the pmu_events_map, find the table of PMU events that corresponds 762 * to the current running CPU. Then, add all PMU events from that table 763 * as aliases. 764 */ 765 void pmu_add_cpu_aliases_map(struct list_head *head, struct perf_pmu *pmu, 766 struct pmu_events_map *map) 767 { 768 int i; 769 const char *name = pmu->name; 770 /* 771 * Found a matching PMU events table. Create aliases 772 */ 773 i = 0; 774 while (1) { 775 const char *cpu_name = is_arm_pmu_core(name) ? name : "cpu"; 776 struct pmu_event *pe = &map->table[i++]; 777 const char *pname = pe->pmu ? pe->pmu : cpu_name; 778 779 if (!pe->name) { 780 if (pe->metric_group || pe->metric_name) 781 continue; 782 break; 783 } 784 785 if (pmu_is_uncore(name) && 786 pmu_uncore_alias_match(pname, name)) 787 goto new_alias; 788 789 if (strcmp(pname, name)) 790 continue; 791 792 new_alias: 793 /* need type casts to override 'const' */ 794 __perf_pmu__new_alias(head, NULL, (char *)pe->name, 795 (char *)pe->desc, (char *)pe->event, 796 (char *)pe->long_desc, (char *)pe->topic, 797 (char *)pe->unit, (char *)pe->perpkg, 798 (char *)pe->metric_expr, 799 (char *)pe->metric_name, 800 (char *)pe->deprecated); 801 } 802 } 803 804 static void pmu_add_cpu_aliases(struct list_head *head, struct perf_pmu *pmu) 805 { 806 struct pmu_events_map *map; 807 808 map = perf_pmu__find_map(pmu); 809 if (!map) 810 return; 811 812 pmu_add_cpu_aliases_map(head, pmu, map); 813 } 814 815 void pmu_for_each_sys_event(pmu_sys_event_iter_fn fn, void *data) 816 { 817 int i = 0; 818 819 while (1) { 820 struct pmu_sys_events *event_table; 821 int j = 0; 822 823 event_table = &pmu_sys_event_tables[i++]; 824 825 if (!event_table->table) 826 break; 827 828 while (1) { 829 struct pmu_event *pe = &event_table->table[j++]; 830 int ret; 831 832 if (!pe->name && !pe->metric_group && !pe->metric_name) 833 break; 834 835 ret = fn(pe, data); 836 if (ret) 837 break; 838 } 839 } 840 } 841 842 struct pmu_sys_event_iter_data { 843 struct list_head *head; 844 struct perf_pmu *pmu; 845 }; 846 847 static int pmu_add_sys_aliases_iter_fn(struct pmu_event *pe, void *data) 848 { 849 struct pmu_sys_event_iter_data *idata = data; 850 struct perf_pmu *pmu = idata->pmu; 851 852 if (!pe->name) { 853 if (pe->metric_group || pe->metric_name) 854 return 0; 855 return -EINVAL; 856 } 857 858 if (!pe->compat || !pe->pmu) 859 return 0; 860 861 if (!strcmp(pmu->id, pe->compat) && 862 pmu_uncore_alias_match(pe->pmu, pmu->name)) { 863 __perf_pmu__new_alias(idata->head, NULL, 864 (char *)pe->name, 865 (char *)pe->desc, 866 (char *)pe->event, 867 (char *)pe->long_desc, 868 (char *)pe->topic, 869 (char *)pe->unit, 870 (char *)pe->perpkg, 871 (char *)pe->metric_expr, 872 (char *)pe->metric_name, 873 (char *)pe->deprecated); 874 } 875 876 return 0; 877 } 878 879 static void pmu_add_sys_aliases(struct list_head *head, struct perf_pmu *pmu) 880 { 881 struct pmu_sys_event_iter_data idata = { 882 .head = head, 883 .pmu = pmu, 884 }; 885 886 if (!pmu->id) 887 return; 888 889 pmu_for_each_sys_event(pmu_add_sys_aliases_iter_fn, &idata); 890 } 891 892 struct perf_event_attr * __weak 893 perf_pmu__get_default_config(struct perf_pmu *pmu __maybe_unused) 894 { 895 return NULL; 896 } 897 898 static int pmu_max_precise(const char *name) 899 { 900 char path[PATH_MAX]; 901 int max_precise = -1; 902 903 scnprintf(path, PATH_MAX, 904 "bus/event_source/devices/%s/caps/max_precise", 905 name); 906 907 sysfs__read_int(path, &max_precise); 908 return max_precise; 909 } 910 911 static struct perf_pmu *pmu_lookup(const char *name) 912 { 913 struct perf_pmu *pmu; 914 LIST_HEAD(format); 915 LIST_HEAD(aliases); 916 __u32 type; 917 918 /* 919 * The pmu data we store & need consists of the pmu 920 * type value and format definitions. Load both right 921 * now. 922 */ 923 if (pmu_format(name, &format)) 924 return NULL; 925 926 /* 927 * Check the type first to avoid unnecessary work. 928 */ 929 if (pmu_type(name, &type)) 930 return NULL; 931 932 if (pmu_aliases(name, &aliases)) 933 return NULL; 934 935 pmu = zalloc(sizeof(*pmu)); 936 if (!pmu) 937 return NULL; 938 939 pmu->cpus = pmu_cpumask(name); 940 pmu->name = strdup(name); 941 pmu->type = type; 942 pmu->is_uncore = pmu_is_uncore(name); 943 if (pmu->is_uncore) 944 pmu->id = pmu_id(name); 945 pmu->max_precise = pmu_max_precise(name); 946 pmu_add_cpu_aliases(&aliases, pmu); 947 pmu_add_sys_aliases(&aliases, pmu); 948 949 INIT_LIST_HEAD(&pmu->format); 950 INIT_LIST_HEAD(&pmu->aliases); 951 INIT_LIST_HEAD(&pmu->caps); 952 list_splice(&format, &pmu->format); 953 list_splice(&aliases, &pmu->aliases); 954 list_add_tail(&pmu->list, &pmus); 955 956 pmu->default_config = perf_pmu__get_default_config(pmu); 957 958 return pmu; 959 } 960 961 static struct perf_pmu *pmu_find(const char *name) 962 { 963 struct perf_pmu *pmu; 964 965 list_for_each_entry(pmu, &pmus, list) 966 if (!strcmp(pmu->name, name)) 967 return pmu; 968 969 return NULL; 970 } 971 972 struct perf_pmu *perf_pmu__find_by_type(unsigned int type) 973 { 974 struct perf_pmu *pmu; 975 976 list_for_each_entry(pmu, &pmus, list) 977 if (pmu->type == type) 978 return pmu; 979 980 return NULL; 981 } 982 983 struct perf_pmu *perf_pmu__scan(struct perf_pmu *pmu) 984 { 985 /* 986 * pmu iterator: If pmu is NULL, we start at the begin, 987 * otherwise return the next pmu. Returns NULL on end. 988 */ 989 if (!pmu) { 990 pmu_read_sysfs(); 991 pmu = list_prepare_entry(pmu, &pmus, list); 992 } 993 list_for_each_entry_continue(pmu, &pmus, list) 994 return pmu; 995 return NULL; 996 } 997 998 struct perf_pmu *evsel__find_pmu(struct evsel *evsel) 999 { 1000 struct perf_pmu *pmu = NULL; 1001 1002 while ((pmu = perf_pmu__scan(pmu)) != NULL) { 1003 if (pmu->type == evsel->core.attr.type) 1004 break; 1005 } 1006 1007 return pmu; 1008 } 1009 1010 bool evsel__is_aux_event(struct evsel *evsel) 1011 { 1012 struct perf_pmu *pmu = evsel__find_pmu(evsel); 1013 1014 return pmu && pmu->auxtrace; 1015 } 1016 1017 struct perf_pmu *perf_pmu__find(const char *name) 1018 { 1019 struct perf_pmu *pmu; 1020 1021 /* 1022 * Once PMU is loaded it stays in the list, 1023 * so we keep us from multiple reading/parsing 1024 * the pmu format definitions. 1025 */ 1026 pmu = pmu_find(name); 1027 if (pmu) 1028 return pmu; 1029 1030 return pmu_lookup(name); 1031 } 1032 1033 static struct perf_pmu_format * 1034 pmu_find_format(struct list_head *formats, const char *name) 1035 { 1036 struct perf_pmu_format *format; 1037 1038 list_for_each_entry(format, formats, list) 1039 if (!strcmp(format->name, name)) 1040 return format; 1041 1042 return NULL; 1043 } 1044 1045 __u64 perf_pmu__format_bits(struct list_head *formats, const char *name) 1046 { 1047 struct perf_pmu_format *format = pmu_find_format(formats, name); 1048 __u64 bits = 0; 1049 int fbit; 1050 1051 if (!format) 1052 return 0; 1053 1054 for_each_set_bit(fbit, format->bits, PERF_PMU_FORMAT_BITS) 1055 bits |= 1ULL << fbit; 1056 1057 return bits; 1058 } 1059 1060 int perf_pmu__format_type(struct list_head *formats, const char *name) 1061 { 1062 struct perf_pmu_format *format = pmu_find_format(formats, name); 1063 1064 if (!format) 1065 return -1; 1066 1067 return format->value; 1068 } 1069 1070 /* 1071 * Sets value based on the format definition (format parameter) 1072 * and unformated value (value parameter). 1073 */ 1074 static void pmu_format_value(unsigned long *format, __u64 value, __u64 *v, 1075 bool zero) 1076 { 1077 unsigned long fbit, vbit; 1078 1079 for (fbit = 0, vbit = 0; fbit < PERF_PMU_FORMAT_BITS; fbit++) { 1080 1081 if (!test_bit(fbit, format)) 1082 continue; 1083 1084 if (value & (1llu << vbit++)) 1085 *v |= (1llu << fbit); 1086 else if (zero) 1087 *v &= ~(1llu << fbit); 1088 } 1089 } 1090 1091 static __u64 pmu_format_max_value(const unsigned long *format) 1092 { 1093 int w; 1094 1095 w = bitmap_weight(format, PERF_PMU_FORMAT_BITS); 1096 if (!w) 1097 return 0; 1098 if (w < 64) 1099 return (1ULL << w) - 1; 1100 return -1; 1101 } 1102 1103 /* 1104 * Term is a string term, and might be a param-term. Try to look up it's value 1105 * in the remaining terms. 1106 * - We have a term like "base-or-format-term=param-term", 1107 * - We need to find the value supplied for "param-term" (with param-term named 1108 * in a config string) later on in the term list. 1109 */ 1110 static int pmu_resolve_param_term(struct parse_events_term *term, 1111 struct list_head *head_terms, 1112 __u64 *value) 1113 { 1114 struct parse_events_term *t; 1115 1116 list_for_each_entry(t, head_terms, list) { 1117 if (t->type_val == PARSE_EVENTS__TERM_TYPE_NUM && 1118 t->config && !strcmp(t->config, term->config)) { 1119 t->used = true; 1120 *value = t->val.num; 1121 return 0; 1122 } 1123 } 1124 1125 if (verbose > 0) 1126 printf("Required parameter '%s' not specified\n", term->config); 1127 1128 return -1; 1129 } 1130 1131 static char *pmu_formats_string(struct list_head *formats) 1132 { 1133 struct perf_pmu_format *format; 1134 char *str = NULL; 1135 struct strbuf buf = STRBUF_INIT; 1136 unsigned i = 0; 1137 1138 if (!formats) 1139 return NULL; 1140 1141 /* sysfs exported terms */ 1142 list_for_each_entry(format, formats, list) 1143 if (strbuf_addf(&buf, i++ ? ",%s" : "%s", format->name) < 0) 1144 goto error; 1145 1146 str = strbuf_detach(&buf, NULL); 1147 error: 1148 strbuf_release(&buf); 1149 1150 return str; 1151 } 1152 1153 /* 1154 * Setup one of config[12] attr members based on the 1155 * user input data - term parameter. 1156 */ 1157 static int pmu_config_term(const char *pmu_name, 1158 struct list_head *formats, 1159 struct perf_event_attr *attr, 1160 struct parse_events_term *term, 1161 struct list_head *head_terms, 1162 bool zero, struct parse_events_error *err) 1163 { 1164 struct perf_pmu_format *format; 1165 __u64 *vp; 1166 __u64 val, max_val; 1167 1168 /* 1169 * If this is a parameter we've already used for parameterized-eval, 1170 * skip it in normal eval. 1171 */ 1172 if (term->used) 1173 return 0; 1174 1175 /* 1176 * Hardcoded terms should be already in, so nothing 1177 * to be done for them. 1178 */ 1179 if (parse_events__is_hardcoded_term(term)) 1180 return 0; 1181 1182 format = pmu_find_format(formats, term->config); 1183 if (!format) { 1184 char *pmu_term = pmu_formats_string(formats); 1185 char *unknown_term; 1186 char *help_msg; 1187 1188 if (asprintf(&unknown_term, 1189 "unknown term '%s' for pmu '%s'", 1190 term->config, pmu_name) < 0) 1191 unknown_term = NULL; 1192 help_msg = parse_events_formats_error_string(pmu_term); 1193 if (err) { 1194 parse_events__handle_error(err, term->err_term, 1195 unknown_term, 1196 help_msg); 1197 } else { 1198 pr_debug("%s (%s)\n", unknown_term, help_msg); 1199 free(unknown_term); 1200 } 1201 free(pmu_term); 1202 return -EINVAL; 1203 } 1204 1205 switch (format->value) { 1206 case PERF_PMU_FORMAT_VALUE_CONFIG: 1207 vp = &attr->config; 1208 break; 1209 case PERF_PMU_FORMAT_VALUE_CONFIG1: 1210 vp = &attr->config1; 1211 break; 1212 case PERF_PMU_FORMAT_VALUE_CONFIG2: 1213 vp = &attr->config2; 1214 break; 1215 default: 1216 return -EINVAL; 1217 } 1218 1219 /* 1220 * Either directly use a numeric term, or try to translate string terms 1221 * using event parameters. 1222 */ 1223 if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) { 1224 if (term->no_value && 1225 bitmap_weight(format->bits, PERF_PMU_FORMAT_BITS) > 1) { 1226 if (err) { 1227 parse_events__handle_error(err, term->err_val, 1228 strdup("no value assigned for term"), 1229 NULL); 1230 } 1231 return -EINVAL; 1232 } 1233 1234 val = term->val.num; 1235 } else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) { 1236 if (strcmp(term->val.str, "?")) { 1237 if (verbose > 0) { 1238 pr_info("Invalid sysfs entry %s=%s\n", 1239 term->config, term->val.str); 1240 } 1241 if (err) { 1242 parse_events__handle_error(err, term->err_val, 1243 strdup("expected numeric value"), 1244 NULL); 1245 } 1246 return -EINVAL; 1247 } 1248 1249 if (pmu_resolve_param_term(term, head_terms, &val)) 1250 return -EINVAL; 1251 } else 1252 return -EINVAL; 1253 1254 max_val = pmu_format_max_value(format->bits); 1255 if (val > max_val) { 1256 if (err) { 1257 char *err_str; 1258 1259 parse_events__handle_error(err, term->err_val, 1260 asprintf(&err_str, 1261 "value too big for format, maximum is %llu", 1262 (unsigned long long)max_val) < 0 1263 ? strdup("value too big for format") 1264 : err_str, 1265 NULL); 1266 return -EINVAL; 1267 } 1268 /* 1269 * Assume we don't care if !err, in which case the value will be 1270 * silently truncated. 1271 */ 1272 } 1273 1274 pmu_format_value(format->bits, val, vp, zero); 1275 return 0; 1276 } 1277 1278 int perf_pmu__config_terms(const char *pmu_name, struct list_head *formats, 1279 struct perf_event_attr *attr, 1280 struct list_head *head_terms, 1281 bool zero, struct parse_events_error *err) 1282 { 1283 struct parse_events_term *term; 1284 1285 list_for_each_entry(term, head_terms, list) { 1286 if (pmu_config_term(pmu_name, formats, attr, term, head_terms, 1287 zero, err)) 1288 return -EINVAL; 1289 } 1290 1291 return 0; 1292 } 1293 1294 /* 1295 * Configures event's 'attr' parameter based on the: 1296 * 1) users input - specified in terms parameter 1297 * 2) pmu format definitions - specified by pmu parameter 1298 */ 1299 int perf_pmu__config(struct perf_pmu *pmu, struct perf_event_attr *attr, 1300 struct list_head *head_terms, 1301 struct parse_events_error *err) 1302 { 1303 bool zero = !!pmu->default_config; 1304 1305 attr->type = pmu->type; 1306 return perf_pmu__config_terms(pmu->name, &pmu->format, attr, 1307 head_terms, zero, err); 1308 } 1309 1310 static struct perf_pmu_alias *pmu_find_alias(struct perf_pmu *pmu, 1311 struct parse_events_term *term) 1312 { 1313 struct perf_pmu_alias *alias; 1314 char *name; 1315 1316 if (parse_events__is_hardcoded_term(term)) 1317 return NULL; 1318 1319 if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) { 1320 if (term->val.num != 1) 1321 return NULL; 1322 if (pmu_find_format(&pmu->format, term->config)) 1323 return NULL; 1324 name = term->config; 1325 } else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) { 1326 if (strcasecmp(term->config, "event")) 1327 return NULL; 1328 name = term->val.str; 1329 } else { 1330 return NULL; 1331 } 1332 1333 list_for_each_entry(alias, &pmu->aliases, list) { 1334 if (!strcasecmp(alias->name, name)) 1335 return alias; 1336 } 1337 return NULL; 1338 } 1339 1340 1341 static int check_info_data(struct perf_pmu_alias *alias, 1342 struct perf_pmu_info *info) 1343 { 1344 /* 1345 * Only one term in event definition can 1346 * define unit, scale and snapshot, fail 1347 * if there's more than one. 1348 */ 1349 if ((info->unit && alias->unit[0]) || 1350 (info->scale && alias->scale) || 1351 (info->snapshot && alias->snapshot)) 1352 return -EINVAL; 1353 1354 if (alias->unit[0]) 1355 info->unit = alias->unit; 1356 1357 if (alias->scale) 1358 info->scale = alias->scale; 1359 1360 if (alias->snapshot) 1361 info->snapshot = alias->snapshot; 1362 1363 return 0; 1364 } 1365 1366 /* 1367 * Find alias in the terms list and replace it with the terms 1368 * defined for the alias 1369 */ 1370 int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms, 1371 struct perf_pmu_info *info) 1372 { 1373 struct parse_events_term *term, *h; 1374 struct perf_pmu_alias *alias; 1375 int ret; 1376 1377 info->per_pkg = false; 1378 1379 /* 1380 * Mark unit and scale as not set 1381 * (different from default values, see below) 1382 */ 1383 info->unit = NULL; 1384 info->scale = 0.0; 1385 info->snapshot = false; 1386 info->metric_expr = NULL; 1387 info->metric_name = NULL; 1388 1389 list_for_each_entry_safe(term, h, head_terms, list) { 1390 alias = pmu_find_alias(pmu, term); 1391 if (!alias) 1392 continue; 1393 ret = pmu_alias_terms(alias, &term->list); 1394 if (ret) 1395 return ret; 1396 1397 ret = check_info_data(alias, info); 1398 if (ret) 1399 return ret; 1400 1401 if (alias->per_pkg) 1402 info->per_pkg = true; 1403 info->metric_expr = alias->metric_expr; 1404 info->metric_name = alias->metric_name; 1405 1406 list_del_init(&term->list); 1407 parse_events_term__delete(term); 1408 } 1409 1410 /* 1411 * if no unit or scale foundin aliases, then 1412 * set defaults as for evsel 1413 * unit cannot left to NULL 1414 */ 1415 if (info->unit == NULL) 1416 info->unit = ""; 1417 1418 if (info->scale == 0.0) 1419 info->scale = 1.0; 1420 1421 return 0; 1422 } 1423 1424 int perf_pmu__new_format(struct list_head *list, char *name, 1425 int config, unsigned long *bits) 1426 { 1427 struct perf_pmu_format *format; 1428 1429 format = zalloc(sizeof(*format)); 1430 if (!format) 1431 return -ENOMEM; 1432 1433 format->name = strdup(name); 1434 format->value = config; 1435 memcpy(format->bits, bits, sizeof(format->bits)); 1436 1437 list_add_tail(&format->list, list); 1438 return 0; 1439 } 1440 1441 void perf_pmu__set_format(unsigned long *bits, long from, long to) 1442 { 1443 long b; 1444 1445 if (!to) 1446 to = from; 1447 1448 memset(bits, 0, BITS_TO_BYTES(PERF_PMU_FORMAT_BITS)); 1449 for (b = from; b <= to; b++) 1450 set_bit(b, bits); 1451 } 1452 1453 void perf_pmu__del_formats(struct list_head *formats) 1454 { 1455 struct perf_pmu_format *fmt, *tmp; 1456 1457 list_for_each_entry_safe(fmt, tmp, formats, list) { 1458 list_del(&fmt->list); 1459 free(fmt->name); 1460 free(fmt); 1461 } 1462 } 1463 1464 static int sub_non_neg(int a, int b) 1465 { 1466 if (b > a) 1467 return 0; 1468 return a - b; 1469 } 1470 1471 static char *format_alias(char *buf, int len, struct perf_pmu *pmu, 1472 struct perf_pmu_alias *alias) 1473 { 1474 struct parse_events_term *term; 1475 int used = snprintf(buf, len, "%s/%s", pmu->name, alias->name); 1476 1477 list_for_each_entry(term, &alias->terms, list) { 1478 if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) 1479 used += snprintf(buf + used, sub_non_neg(len, used), 1480 ",%s=%s", term->config, 1481 term->val.str); 1482 } 1483 1484 if (sub_non_neg(len, used) > 0) { 1485 buf[used] = '/'; 1486 used++; 1487 } 1488 if (sub_non_neg(len, used) > 0) { 1489 buf[used] = '\0'; 1490 used++; 1491 } else 1492 buf[len - 1] = '\0'; 1493 1494 return buf; 1495 } 1496 1497 static char *format_alias_or(char *buf, int len, struct perf_pmu *pmu, 1498 struct perf_pmu_alias *alias) 1499 { 1500 snprintf(buf, len, "%s OR %s/%s/", alias->name, pmu->name, alias->name); 1501 return buf; 1502 } 1503 1504 struct sevent { 1505 char *name; 1506 char *desc; 1507 char *topic; 1508 char *str; 1509 char *pmu; 1510 char *metric_expr; 1511 char *metric_name; 1512 int is_cpu; 1513 }; 1514 1515 static int cmp_sevent(const void *a, const void *b) 1516 { 1517 const struct sevent *as = a; 1518 const struct sevent *bs = b; 1519 1520 /* Put extra events last */ 1521 if (!!as->desc != !!bs->desc) 1522 return !!as->desc - !!bs->desc; 1523 if (as->topic && bs->topic) { 1524 int n = strcmp(as->topic, bs->topic); 1525 1526 if (n) 1527 return n; 1528 } 1529 1530 /* Order CPU core events to be first */ 1531 if (as->is_cpu != bs->is_cpu) 1532 return bs->is_cpu - as->is_cpu; 1533 1534 return strcmp(as->name, bs->name); 1535 } 1536 1537 static void wordwrap(char *s, int start, int max, int corr) 1538 { 1539 int column = start; 1540 int n; 1541 1542 while (*s) { 1543 int wlen = strcspn(s, " \t"); 1544 1545 if (column + wlen >= max && column > start) { 1546 printf("\n%*s", start, ""); 1547 column = start + corr; 1548 } 1549 n = printf("%s%.*s", column > start ? " " : "", wlen, s); 1550 if (n <= 0) 1551 break; 1552 s += wlen; 1553 column += n; 1554 s = skip_spaces(s); 1555 } 1556 } 1557 1558 bool is_pmu_core(const char *name) 1559 { 1560 return !strcmp(name, "cpu") || is_arm_pmu_core(name); 1561 } 1562 1563 void print_pmu_events(const char *event_glob, bool name_only, bool quiet_flag, 1564 bool long_desc, bool details_flag, bool deprecated) 1565 { 1566 struct perf_pmu *pmu; 1567 struct perf_pmu_alias *alias; 1568 char buf[1024]; 1569 int printed = 0; 1570 int len, j; 1571 struct sevent *aliases; 1572 int numdesc = 0; 1573 int columns = pager_get_columns(); 1574 char *topic = NULL; 1575 1576 pmu = NULL; 1577 len = 0; 1578 while ((pmu = perf_pmu__scan(pmu)) != NULL) { 1579 list_for_each_entry(alias, &pmu->aliases, list) 1580 len++; 1581 if (pmu->selectable) 1582 len++; 1583 } 1584 aliases = zalloc(sizeof(struct sevent) * len); 1585 if (!aliases) 1586 goto out_enomem; 1587 pmu = NULL; 1588 j = 0; 1589 while ((pmu = perf_pmu__scan(pmu)) != NULL) { 1590 list_for_each_entry(alias, &pmu->aliases, list) { 1591 char *name = alias->desc ? alias->name : 1592 format_alias(buf, sizeof(buf), pmu, alias); 1593 bool is_cpu = is_pmu_core(pmu->name); 1594 1595 if (alias->deprecated && !deprecated) 1596 continue; 1597 1598 if (event_glob != NULL && 1599 !(strglobmatch_nocase(name, event_glob) || 1600 (!is_cpu && strglobmatch_nocase(alias->name, 1601 event_glob)) || 1602 (alias->topic && 1603 strglobmatch_nocase(alias->topic, event_glob)))) 1604 continue; 1605 1606 if (is_cpu && !name_only && !alias->desc) 1607 name = format_alias_or(buf, sizeof(buf), pmu, alias); 1608 1609 aliases[j].name = name; 1610 if (is_cpu && !name_only && !alias->desc) 1611 aliases[j].name = format_alias_or(buf, 1612 sizeof(buf), 1613 pmu, alias); 1614 aliases[j].name = strdup(aliases[j].name); 1615 if (!aliases[j].name) 1616 goto out_enomem; 1617 1618 aliases[j].desc = long_desc ? alias->long_desc : 1619 alias->desc; 1620 aliases[j].topic = alias->topic; 1621 aliases[j].str = alias->str; 1622 aliases[j].pmu = pmu->name; 1623 aliases[j].metric_expr = alias->metric_expr; 1624 aliases[j].metric_name = alias->metric_name; 1625 aliases[j].is_cpu = is_cpu; 1626 j++; 1627 } 1628 if (pmu->selectable && 1629 (event_glob == NULL || strglobmatch(pmu->name, event_glob))) { 1630 char *s; 1631 if (asprintf(&s, "%s//", pmu->name) < 0) 1632 goto out_enomem; 1633 aliases[j].name = s; 1634 j++; 1635 } 1636 } 1637 len = j; 1638 qsort(aliases, len, sizeof(struct sevent), cmp_sevent); 1639 for (j = 0; j < len; j++) { 1640 /* Skip duplicates */ 1641 if (j > 0 && !strcmp(aliases[j].name, aliases[j - 1].name)) 1642 continue; 1643 if (name_only) { 1644 printf("%s ", aliases[j].name); 1645 continue; 1646 } 1647 if (aliases[j].desc && !quiet_flag) { 1648 if (numdesc++ == 0) 1649 printf("\n"); 1650 if (aliases[j].topic && (!topic || 1651 strcmp(topic, aliases[j].topic))) { 1652 printf("%s%s:\n", topic ? "\n" : "", 1653 aliases[j].topic); 1654 topic = aliases[j].topic; 1655 } 1656 printf(" %-50s\n", aliases[j].name); 1657 printf("%*s", 8, "["); 1658 wordwrap(aliases[j].desc, 8, columns, 0); 1659 printf("]\n"); 1660 if (details_flag) { 1661 printf("%*s%s/%s/ ", 8, "", aliases[j].pmu, aliases[j].str); 1662 if (aliases[j].metric_name) 1663 printf(" MetricName: %s", aliases[j].metric_name); 1664 if (aliases[j].metric_expr) 1665 printf(" MetricExpr: %s", aliases[j].metric_expr); 1666 putchar('\n'); 1667 } 1668 } else 1669 printf(" %-50s [Kernel PMU event]\n", aliases[j].name); 1670 printed++; 1671 } 1672 if (printed && pager_in_use()) 1673 printf("\n"); 1674 out_free: 1675 for (j = 0; j < len; j++) 1676 zfree(&aliases[j].name); 1677 zfree(&aliases); 1678 return; 1679 1680 out_enomem: 1681 printf("FATAL: not enough memory to print PMU events\n"); 1682 if (aliases) 1683 goto out_free; 1684 } 1685 1686 bool pmu_have_event(const char *pname, const char *name) 1687 { 1688 struct perf_pmu *pmu; 1689 struct perf_pmu_alias *alias; 1690 1691 pmu = NULL; 1692 while ((pmu = perf_pmu__scan(pmu)) != NULL) { 1693 if (strcmp(pname, pmu->name)) 1694 continue; 1695 list_for_each_entry(alias, &pmu->aliases, list) 1696 if (!strcmp(alias->name, name)) 1697 return true; 1698 } 1699 return false; 1700 } 1701 1702 static FILE *perf_pmu__open_file(struct perf_pmu *pmu, const char *name) 1703 { 1704 char path[PATH_MAX]; 1705 const char *sysfs; 1706 1707 sysfs = sysfs__mountpoint(); 1708 if (!sysfs) 1709 return NULL; 1710 1711 snprintf(path, PATH_MAX, 1712 "%s" EVENT_SOURCE_DEVICE_PATH "%s/%s", sysfs, pmu->name, name); 1713 if (!file_available(path)) 1714 return NULL; 1715 return fopen(path, "r"); 1716 } 1717 1718 int perf_pmu__scan_file(struct perf_pmu *pmu, const char *name, const char *fmt, 1719 ...) 1720 { 1721 va_list args; 1722 FILE *file; 1723 int ret = EOF; 1724 1725 va_start(args, fmt); 1726 file = perf_pmu__open_file(pmu, name); 1727 if (file) { 1728 ret = vfscanf(file, fmt, args); 1729 fclose(file); 1730 } 1731 va_end(args); 1732 return ret; 1733 } 1734 1735 static int perf_pmu__new_caps(struct list_head *list, char *name, char *value) 1736 { 1737 struct perf_pmu_caps *caps = zalloc(sizeof(*caps)); 1738 1739 if (!caps) 1740 return -ENOMEM; 1741 1742 caps->name = strdup(name); 1743 if (!caps->name) 1744 goto free_caps; 1745 caps->value = strndup(value, strlen(value) - 1); 1746 if (!caps->value) 1747 goto free_name; 1748 list_add_tail(&caps->list, list); 1749 return 0; 1750 1751 free_name: 1752 zfree(caps->name); 1753 free_caps: 1754 free(caps); 1755 1756 return -ENOMEM; 1757 } 1758 1759 /* 1760 * Reading/parsing the given pmu capabilities, which should be located at: 1761 * /sys/bus/event_source/devices/<dev>/caps as sysfs group attributes. 1762 * Return the number of capabilities 1763 */ 1764 int perf_pmu__caps_parse(struct perf_pmu *pmu) 1765 { 1766 struct stat st; 1767 char caps_path[PATH_MAX]; 1768 const char *sysfs = sysfs__mountpoint(); 1769 DIR *caps_dir; 1770 struct dirent *evt_ent; 1771 int nr_caps = 0; 1772 1773 if (!sysfs) 1774 return -1; 1775 1776 snprintf(caps_path, PATH_MAX, 1777 "%s" EVENT_SOURCE_DEVICE_PATH "%s/caps", sysfs, pmu->name); 1778 1779 if (stat(caps_path, &st) < 0) 1780 return 0; /* no error if caps does not exist */ 1781 1782 caps_dir = opendir(caps_path); 1783 if (!caps_dir) 1784 return -EINVAL; 1785 1786 while ((evt_ent = readdir(caps_dir)) != NULL) { 1787 char path[PATH_MAX + NAME_MAX + 1]; 1788 char *name = evt_ent->d_name; 1789 char value[128]; 1790 FILE *file; 1791 1792 if (!strcmp(name, ".") || !strcmp(name, "..")) 1793 continue; 1794 1795 snprintf(path, sizeof(path), "%s/%s", caps_path, name); 1796 1797 file = fopen(path, "r"); 1798 if (!file) 1799 continue; 1800 1801 if (!fgets(value, sizeof(value), file) || 1802 (perf_pmu__new_caps(&pmu->caps, name, value) < 0)) { 1803 fclose(file); 1804 continue; 1805 } 1806 1807 nr_caps++; 1808 fclose(file); 1809 } 1810 1811 closedir(caps_dir); 1812 1813 return nr_caps; 1814 } 1815