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 <linux/ctype.h> 7 #include <subcmd/pager.h> 8 #include <sys/types.h> 9 #include <errno.h> 10 #include <fcntl.h> 11 #include <sys/stat.h> 12 #include <unistd.h> 13 #include <stdio.h> 14 #include <stdbool.h> 15 #include <stdarg.h> 16 #include <dirent.h> 17 #include <api/fs/fs.h> 18 #include <locale.h> 19 #include <regex.h> 20 #include <perf/cpumap.h> 21 #include <fnmatch.h> 22 #include "debug.h" 23 #include "evsel.h" 24 #include "pmu.h" 25 #include "parse-events.h" 26 #include "header.h" 27 #include "string2.h" 28 #include "strbuf.h" 29 #include "fncache.h" 30 #include "pmu-hybrid.h" 31 32 struct perf_pmu perf_pmu__fake; 33 34 struct perf_pmu_format { 35 char *name; 36 int value; 37 DECLARE_BITMAP(bits, PERF_PMU_FORMAT_BITS); 38 struct list_head list; 39 }; 40 41 int perf_pmu_parse(struct list_head *list, char *name); 42 extern FILE *perf_pmu_in; 43 44 static LIST_HEAD(pmus); 45 static bool hybrid_scanned; 46 47 /* 48 * Parse & process all the sysfs attributes located under 49 * the directory specified in 'dir' parameter. 50 */ 51 int perf_pmu__format_parse(char *dir, struct list_head *head) 52 { 53 struct dirent *evt_ent; 54 DIR *format_dir; 55 int ret = 0; 56 57 format_dir = opendir(dir); 58 if (!format_dir) 59 return -EINVAL; 60 61 while (!ret && (evt_ent = readdir(format_dir))) { 62 char path[PATH_MAX]; 63 char *name = evt_ent->d_name; 64 FILE *file; 65 66 if (!strcmp(name, ".") || !strcmp(name, "..")) 67 continue; 68 69 snprintf(path, PATH_MAX, "%s/%s", dir, name); 70 71 ret = -EINVAL; 72 file = fopen(path, "r"); 73 if (!file) 74 break; 75 76 perf_pmu_in = file; 77 ret = perf_pmu_parse(head, name); 78 fclose(file); 79 } 80 81 closedir(format_dir); 82 return ret; 83 } 84 85 /* 86 * Reading/parsing the default pmu format definition, which should be 87 * located at: 88 * /sys/bus/event_source/devices/<dev>/format as sysfs group attributes. 89 */ 90 static int pmu_format(const char *name, struct list_head *format) 91 { 92 char path[PATH_MAX]; 93 const char *sysfs = sysfs__mountpoint(); 94 95 if (!sysfs) 96 return -1; 97 98 snprintf(path, PATH_MAX, 99 "%s" EVENT_SOURCE_DEVICE_PATH "%s/format", sysfs, name); 100 101 if (!file_available(path)) 102 return 0; 103 104 if (perf_pmu__format_parse(path, format)) 105 return -1; 106 107 return 0; 108 } 109 110 int perf_pmu__convert_scale(const char *scale, char **end, double *sval) 111 { 112 char *lc; 113 int ret = 0; 114 115 /* 116 * save current locale 117 */ 118 lc = setlocale(LC_NUMERIC, NULL); 119 120 /* 121 * The lc string may be allocated in static storage, 122 * so get a dynamic copy to make it survive setlocale 123 * call below. 124 */ 125 lc = strdup(lc); 126 if (!lc) { 127 ret = -ENOMEM; 128 goto out; 129 } 130 131 /* 132 * force to C locale to ensure kernel 133 * scale string is converted correctly. 134 * kernel uses default C locale. 135 */ 136 setlocale(LC_NUMERIC, "C"); 137 138 *sval = strtod(scale, end); 139 140 out: 141 /* restore locale */ 142 setlocale(LC_NUMERIC, lc); 143 free(lc); 144 return ret; 145 } 146 147 static int perf_pmu__parse_scale(struct perf_pmu_alias *alias, char *dir, char *name) 148 { 149 struct stat st; 150 ssize_t sret; 151 char scale[128]; 152 int fd, ret = -1; 153 char path[PATH_MAX]; 154 155 scnprintf(path, PATH_MAX, "%s/%s.scale", dir, name); 156 157 fd = open(path, O_RDONLY); 158 if (fd == -1) 159 return -1; 160 161 if (fstat(fd, &st) < 0) 162 goto error; 163 164 sret = read(fd, scale, sizeof(scale)-1); 165 if (sret < 0) 166 goto error; 167 168 if (scale[sret - 1] == '\n') 169 scale[sret - 1] = '\0'; 170 else 171 scale[sret] = '\0'; 172 173 ret = perf_pmu__convert_scale(scale, NULL, &alias->scale); 174 error: 175 close(fd); 176 return ret; 177 } 178 179 static int perf_pmu__parse_unit(struct perf_pmu_alias *alias, char *dir, char *name) 180 { 181 char path[PATH_MAX]; 182 ssize_t sret; 183 int fd; 184 185 scnprintf(path, PATH_MAX, "%s/%s.unit", dir, name); 186 187 fd = open(path, O_RDONLY); 188 if (fd == -1) 189 return -1; 190 191 sret = read(fd, alias->unit, UNIT_MAX_LEN); 192 if (sret < 0) 193 goto error; 194 195 close(fd); 196 197 if (alias->unit[sret - 1] == '\n') 198 alias->unit[sret - 1] = '\0'; 199 else 200 alias->unit[sret] = '\0'; 201 202 return 0; 203 error: 204 close(fd); 205 alias->unit[0] = '\0'; 206 return -1; 207 } 208 209 static int 210 perf_pmu__parse_per_pkg(struct perf_pmu_alias *alias, char *dir, char *name) 211 { 212 char path[PATH_MAX]; 213 int fd; 214 215 scnprintf(path, PATH_MAX, "%s/%s.per-pkg", dir, name); 216 217 fd = open(path, O_RDONLY); 218 if (fd == -1) 219 return -1; 220 221 close(fd); 222 223 alias->per_pkg = true; 224 return 0; 225 } 226 227 static int perf_pmu__parse_snapshot(struct perf_pmu_alias *alias, 228 char *dir, char *name) 229 { 230 char path[PATH_MAX]; 231 int fd; 232 233 scnprintf(path, PATH_MAX, "%s/%s.snapshot", dir, name); 234 235 fd = open(path, O_RDONLY); 236 if (fd == -1) 237 return -1; 238 239 alias->snapshot = true; 240 close(fd); 241 return 0; 242 } 243 244 static void perf_pmu_assign_str(char *name, const char *field, char **old_str, 245 char **new_str) 246 { 247 if (!*old_str) 248 goto set_new; 249 250 if (*new_str) { /* Have new string, check with old */ 251 if (strcasecmp(*old_str, *new_str)) 252 pr_debug("alias %s differs in field '%s'\n", 253 name, field); 254 zfree(old_str); 255 } else /* Nothing new --> keep old string */ 256 return; 257 set_new: 258 *old_str = *new_str; 259 *new_str = NULL; 260 } 261 262 static void perf_pmu_update_alias(struct perf_pmu_alias *old, 263 struct perf_pmu_alias *newalias) 264 { 265 perf_pmu_assign_str(old->name, "desc", &old->desc, &newalias->desc); 266 perf_pmu_assign_str(old->name, "long_desc", &old->long_desc, 267 &newalias->long_desc); 268 perf_pmu_assign_str(old->name, "topic", &old->topic, &newalias->topic); 269 perf_pmu_assign_str(old->name, "metric_expr", &old->metric_expr, 270 &newalias->metric_expr); 271 perf_pmu_assign_str(old->name, "metric_name", &old->metric_name, 272 &newalias->metric_name); 273 perf_pmu_assign_str(old->name, "value", &old->str, &newalias->str); 274 old->scale = newalias->scale; 275 old->per_pkg = newalias->per_pkg; 276 old->snapshot = newalias->snapshot; 277 memcpy(old->unit, newalias->unit, sizeof(old->unit)); 278 } 279 280 /* Delete an alias entry. */ 281 void perf_pmu_free_alias(struct perf_pmu_alias *newalias) 282 { 283 zfree(&newalias->name); 284 zfree(&newalias->desc); 285 zfree(&newalias->long_desc); 286 zfree(&newalias->topic); 287 zfree(&newalias->str); 288 zfree(&newalias->metric_expr); 289 zfree(&newalias->metric_name); 290 zfree(&newalias->pmu_name); 291 parse_events_terms__purge(&newalias->terms); 292 free(newalias); 293 } 294 295 /* Merge an alias, search in alias list. If this name is already 296 * present merge both of them to combine all information. 297 */ 298 static bool perf_pmu_merge_alias(struct perf_pmu_alias *newalias, 299 struct list_head *alist) 300 { 301 struct perf_pmu_alias *a; 302 303 list_for_each_entry(a, alist, list) { 304 if (!strcasecmp(newalias->name, a->name)) { 305 if (newalias->pmu_name && a->pmu_name && 306 !strcasecmp(newalias->pmu_name, a->pmu_name)) { 307 continue; 308 } 309 perf_pmu_update_alias(a, newalias); 310 perf_pmu_free_alias(newalias); 311 return true; 312 } 313 } 314 return false; 315 } 316 317 static int __perf_pmu__new_alias(struct list_head *list, char *dir, char *name, 318 char *desc, char *val, struct pmu_event *pe) 319 { 320 struct parse_events_term *term; 321 struct perf_pmu_alias *alias; 322 int ret; 323 int num; 324 char newval[256]; 325 char *long_desc = NULL, *topic = NULL, *unit = NULL, *perpkg = NULL, 326 *metric_expr = NULL, *metric_name = NULL, *deprecated = NULL, 327 *pmu_name = NULL; 328 329 if (pe) { 330 long_desc = (char *)pe->long_desc; 331 topic = (char *)pe->topic; 332 unit = (char *)pe->unit; 333 perpkg = (char *)pe->perpkg; 334 metric_expr = (char *)pe->metric_expr; 335 metric_name = (char *)pe->metric_name; 336 deprecated = (char *)pe->deprecated; 337 pmu_name = (char *)pe->pmu; 338 } 339 340 alias = malloc(sizeof(*alias)); 341 if (!alias) 342 return -ENOMEM; 343 344 INIT_LIST_HEAD(&alias->terms); 345 alias->scale = 1.0; 346 alias->unit[0] = '\0'; 347 alias->per_pkg = false; 348 alias->snapshot = false; 349 alias->deprecated = false; 350 351 ret = parse_events_terms(&alias->terms, val); 352 if (ret) { 353 pr_err("Cannot parse alias %s: %d\n", val, ret); 354 free(alias); 355 return ret; 356 } 357 358 /* Scan event and remove leading zeroes, spaces, newlines, some 359 * platforms have terms specified as 360 * event=0x0091 (read from files ../<PMU>/events/<FILE> 361 * and terms specified as event=0x91 (read from JSON files). 362 * 363 * Rebuild string to make alias->str member comparable. 364 */ 365 memset(newval, 0, sizeof(newval)); 366 ret = 0; 367 list_for_each_entry(term, &alias->terms, list) { 368 if (ret) 369 ret += scnprintf(newval + ret, sizeof(newval) - ret, 370 ","); 371 if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) 372 ret += scnprintf(newval + ret, sizeof(newval) - ret, 373 "%s=%#x", term->config, term->val.num); 374 else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) 375 ret += scnprintf(newval + ret, sizeof(newval) - ret, 376 "%s=%s", term->config, term->val.str); 377 } 378 379 alias->name = strdup(name); 380 if (dir) { 381 /* 382 * load unit name and scale if available 383 */ 384 perf_pmu__parse_unit(alias, dir, name); 385 perf_pmu__parse_scale(alias, dir, name); 386 perf_pmu__parse_per_pkg(alias, dir, name); 387 perf_pmu__parse_snapshot(alias, dir, name); 388 } 389 390 alias->metric_expr = metric_expr ? strdup(metric_expr) : NULL; 391 alias->metric_name = metric_name ? strdup(metric_name): NULL; 392 alias->desc = desc ? strdup(desc) : NULL; 393 alias->long_desc = long_desc ? strdup(long_desc) : 394 desc ? strdup(desc) : NULL; 395 alias->topic = topic ? strdup(topic) : NULL; 396 if (unit) { 397 if (perf_pmu__convert_scale(unit, &unit, &alias->scale) < 0) 398 return -1; 399 snprintf(alias->unit, sizeof(alias->unit), "%s", unit); 400 } 401 alias->per_pkg = perpkg && sscanf(perpkg, "%d", &num) == 1 && num == 1; 402 alias->str = strdup(newval); 403 alias->pmu_name = pmu_name ? strdup(pmu_name) : NULL; 404 405 if (deprecated) 406 alias->deprecated = true; 407 408 if (!perf_pmu_merge_alias(alias, list)) 409 list_add_tail(&alias->list, list); 410 411 return 0; 412 } 413 414 static int perf_pmu__new_alias(struct list_head *list, char *dir, char *name, FILE *file) 415 { 416 char buf[256]; 417 int ret; 418 419 ret = fread(buf, 1, sizeof(buf), file); 420 if (ret == 0) 421 return -EINVAL; 422 423 buf[ret] = 0; 424 425 /* Remove trailing newline from sysfs file */ 426 strim(buf); 427 428 return __perf_pmu__new_alias(list, dir, name, NULL, buf, NULL); 429 } 430 431 static inline bool pmu_alias_info_file(char *name) 432 { 433 size_t len; 434 435 len = strlen(name); 436 if (len > 5 && !strcmp(name + len - 5, ".unit")) 437 return true; 438 if (len > 6 && !strcmp(name + len - 6, ".scale")) 439 return true; 440 if (len > 8 && !strcmp(name + len - 8, ".per-pkg")) 441 return true; 442 if (len > 9 && !strcmp(name + len - 9, ".snapshot")) 443 return true; 444 445 return false; 446 } 447 448 /* 449 * Process all the sysfs attributes located under the directory 450 * specified in 'dir' parameter. 451 */ 452 static int pmu_aliases_parse(char *dir, struct list_head *head) 453 { 454 struct dirent *evt_ent; 455 DIR *event_dir; 456 457 event_dir = opendir(dir); 458 if (!event_dir) 459 return -EINVAL; 460 461 while ((evt_ent = readdir(event_dir))) { 462 char path[PATH_MAX]; 463 char *name = evt_ent->d_name; 464 FILE *file; 465 466 if (!strcmp(name, ".") || !strcmp(name, "..")) 467 continue; 468 469 /* 470 * skip info files parsed in perf_pmu__new_alias() 471 */ 472 if (pmu_alias_info_file(name)) 473 continue; 474 475 scnprintf(path, PATH_MAX, "%s/%s", dir, name); 476 477 file = fopen(path, "r"); 478 if (!file) { 479 pr_debug("Cannot open %s\n", path); 480 continue; 481 } 482 483 if (perf_pmu__new_alias(head, dir, name, file) < 0) 484 pr_debug("Cannot set up %s\n", name); 485 fclose(file); 486 } 487 488 closedir(event_dir); 489 return 0; 490 } 491 492 /* 493 * Reading the pmu event aliases definition, which should be located at: 494 * /sys/bus/event_source/devices/<dev>/events as sysfs group attributes. 495 */ 496 static int pmu_aliases(const char *name, struct list_head *head) 497 { 498 char path[PATH_MAX]; 499 const char *sysfs = sysfs__mountpoint(); 500 501 if (!sysfs) 502 return -1; 503 504 snprintf(path, PATH_MAX, 505 "%s/bus/event_source/devices/%s/events", sysfs, name); 506 507 if (!file_available(path)) 508 return 0; 509 510 if (pmu_aliases_parse(path, head)) 511 return -1; 512 513 return 0; 514 } 515 516 static int pmu_alias_terms(struct perf_pmu_alias *alias, 517 struct list_head *terms) 518 { 519 struct parse_events_term *term, *cloned; 520 LIST_HEAD(list); 521 int ret; 522 523 list_for_each_entry(term, &alias->terms, list) { 524 ret = parse_events_term__clone(&cloned, term); 525 if (ret) { 526 parse_events_terms__purge(&list); 527 return ret; 528 } 529 /* 530 * Weak terms don't override command line options, 531 * which we don't want for implicit terms in aliases. 532 */ 533 cloned->weak = true; 534 list_add_tail(&cloned->list, &list); 535 } 536 list_splice(&list, terms); 537 return 0; 538 } 539 540 /* 541 * Reading/parsing the default pmu type value, which should be 542 * located at: 543 * /sys/bus/event_source/devices/<dev>/type as sysfs attribute. 544 */ 545 static int pmu_type(const char *name, __u32 *type) 546 { 547 char path[PATH_MAX]; 548 FILE *file; 549 int ret = 0; 550 const char *sysfs = sysfs__mountpoint(); 551 552 if (!sysfs) 553 return -1; 554 555 snprintf(path, PATH_MAX, 556 "%s" EVENT_SOURCE_DEVICE_PATH "%s/type", sysfs, name); 557 558 if (access(path, R_OK) < 0) 559 return -1; 560 561 file = fopen(path, "r"); 562 if (!file) 563 return -EINVAL; 564 565 if (1 != fscanf(file, "%u", type)) 566 ret = -1; 567 568 fclose(file); 569 return ret; 570 } 571 572 /* Add all pmus in sysfs to pmu list: */ 573 static void pmu_read_sysfs(void) 574 { 575 char path[PATH_MAX]; 576 DIR *dir; 577 struct dirent *dent; 578 const char *sysfs = sysfs__mountpoint(); 579 580 if (!sysfs) 581 return; 582 583 snprintf(path, PATH_MAX, 584 "%s" EVENT_SOURCE_DEVICE_PATH, sysfs); 585 586 dir = opendir(path); 587 if (!dir) 588 return; 589 590 while ((dent = readdir(dir))) { 591 if (!strcmp(dent->d_name, ".") || !strcmp(dent->d_name, "..")) 592 continue; 593 /* add to static LIST_HEAD(pmus): */ 594 perf_pmu__find(dent->d_name); 595 } 596 597 closedir(dir); 598 } 599 600 static struct perf_cpu_map *__pmu_cpumask(const char *path) 601 { 602 FILE *file; 603 struct perf_cpu_map *cpus; 604 605 file = fopen(path, "r"); 606 if (!file) 607 return NULL; 608 609 cpus = perf_cpu_map__read(file); 610 fclose(file); 611 return cpus; 612 } 613 614 /* 615 * Uncore PMUs have a "cpumask" file under sysfs. CPU PMUs (e.g. on arm/arm64) 616 * may have a "cpus" file. 617 */ 618 #define SYS_TEMPLATE_ID "./bus/event_source/devices/%s/identifier" 619 #define CPUS_TEMPLATE_UNCORE "%s/bus/event_source/devices/%s/cpumask" 620 621 static struct perf_cpu_map *pmu_cpumask(const char *name) 622 { 623 char path[PATH_MAX]; 624 struct perf_cpu_map *cpus; 625 const char *sysfs = sysfs__mountpoint(); 626 const char *templates[] = { 627 CPUS_TEMPLATE_UNCORE, 628 CPUS_TEMPLATE_CPU, 629 NULL 630 }; 631 const char **template; 632 633 if (!sysfs) 634 return NULL; 635 636 for (template = templates; *template; template++) { 637 snprintf(path, PATH_MAX, *template, sysfs, name); 638 cpus = __pmu_cpumask(path); 639 if (cpus) 640 return cpus; 641 } 642 643 return NULL; 644 } 645 646 static bool pmu_is_uncore(const char *name) 647 { 648 char path[PATH_MAX]; 649 const char *sysfs; 650 651 if (perf_pmu__hybrid_mounted(name)) 652 return false; 653 654 sysfs = sysfs__mountpoint(); 655 snprintf(path, PATH_MAX, CPUS_TEMPLATE_UNCORE, sysfs, name); 656 return file_available(path); 657 } 658 659 static char *pmu_id(const char *name) 660 { 661 char path[PATH_MAX], *str; 662 size_t len; 663 664 snprintf(path, PATH_MAX, SYS_TEMPLATE_ID, name); 665 666 if (sysfs__read_str(path, &str, &len) < 0) 667 return NULL; 668 669 str[len - 1] = 0; /* remove line feed */ 670 671 return str; 672 } 673 674 /* 675 * PMU CORE devices have different name other than cpu in sysfs on some 676 * platforms. 677 * Looking for possible sysfs files to identify the arm core device. 678 */ 679 static int is_arm_pmu_core(const char *name) 680 { 681 char path[PATH_MAX]; 682 const char *sysfs = sysfs__mountpoint(); 683 684 if (!sysfs) 685 return 0; 686 687 /* Look for cpu sysfs (specific to arm) */ 688 scnprintf(path, PATH_MAX, "%s/bus/event_source/devices/%s/cpus", 689 sysfs, name); 690 return file_available(path); 691 } 692 693 static char *perf_pmu__getcpuid(struct perf_pmu *pmu) 694 { 695 char *cpuid; 696 static bool printed; 697 698 cpuid = getenv("PERF_CPUID"); 699 if (cpuid) 700 cpuid = strdup(cpuid); 701 if (!cpuid) 702 cpuid = get_cpuid_str(pmu); 703 if (!cpuid) 704 return NULL; 705 706 if (!printed) { 707 pr_debug("Using CPUID %s\n", cpuid); 708 printed = true; 709 } 710 return cpuid; 711 } 712 713 struct pmu_events_map *perf_pmu__find_map(struct perf_pmu *pmu) 714 { 715 struct pmu_events_map *map; 716 char *cpuid = perf_pmu__getcpuid(pmu); 717 int i; 718 719 /* on some platforms which uses cpus map, cpuid can be NULL for 720 * PMUs other than CORE PMUs. 721 */ 722 if (!cpuid) 723 return NULL; 724 725 i = 0; 726 for (;;) { 727 map = &pmu_events_map[i++]; 728 if (!map->table) { 729 map = NULL; 730 break; 731 } 732 733 if (!strcmp_cpuid_str(map->cpuid, cpuid)) 734 break; 735 } 736 free(cpuid); 737 return map; 738 } 739 740 struct pmu_events_map *__weak pmu_events_map__find(void) 741 { 742 return perf_pmu__find_map(NULL); 743 } 744 745 static bool perf_pmu__valid_suffix(char *pmu_name, char *tok) 746 { 747 char *p; 748 749 if (strncmp(pmu_name, tok, strlen(tok))) 750 return false; 751 752 p = pmu_name + strlen(tok); 753 if (*p == 0) 754 return true; 755 756 if (*p != '_') 757 return false; 758 759 ++p; 760 if (*p == 0 || !isdigit(*p)) 761 return false; 762 763 return true; 764 } 765 766 bool pmu_uncore_alias_match(const char *pmu_name, const char *name) 767 { 768 char *tmp = NULL, *tok, *str; 769 bool res; 770 771 str = strdup(pmu_name); 772 if (!str) 773 return false; 774 775 /* 776 * uncore alias may be from different PMU with common prefix 777 */ 778 tok = strtok_r(str, ",", &tmp); 779 if (strncmp(pmu_name, tok, strlen(tok))) { 780 res = false; 781 goto out; 782 } 783 784 /* 785 * Match more complex aliases where the alias name is a comma-delimited 786 * list of tokens, orderly contained in the matching PMU name. 787 * 788 * Example: For alias "socket,pmuname" and PMU "socketX_pmunameY", we 789 * match "socket" in "socketX_pmunameY" and then "pmuname" in 790 * "pmunameY". 791 */ 792 for (; tok; name += strlen(tok), tok = strtok_r(NULL, ",", &tmp)) { 793 name = strstr(name, tok); 794 if (!name || !perf_pmu__valid_suffix((char *)name, tok)) { 795 res = false; 796 goto out; 797 } 798 } 799 800 res = true; 801 out: 802 free(str); 803 return res; 804 } 805 806 /* 807 * From the pmu_events_map, find the table of PMU events that corresponds 808 * to the current running CPU. Then, add all PMU events from that table 809 * as aliases. 810 */ 811 void pmu_add_cpu_aliases_map(struct list_head *head, struct perf_pmu *pmu, 812 struct pmu_events_map *map) 813 { 814 int i; 815 const char *name = pmu->name; 816 /* 817 * Found a matching PMU events table. Create aliases 818 */ 819 i = 0; 820 while (1) { 821 const char *cpu_name = is_arm_pmu_core(name) ? name : "cpu"; 822 struct pmu_event *pe = &map->table[i++]; 823 const char *pname = pe->pmu ? pe->pmu : cpu_name; 824 825 if (!pe->name) { 826 if (pe->metric_group || pe->metric_name) 827 continue; 828 break; 829 } 830 831 if (pmu_is_uncore(name) && 832 pmu_uncore_alias_match(pname, name)) 833 goto new_alias; 834 835 if (strcmp(pname, name)) 836 continue; 837 838 new_alias: 839 /* need type casts to override 'const' */ 840 __perf_pmu__new_alias(head, NULL, (char *)pe->name, 841 (char *)pe->desc, (char *)pe->event, 842 pe); 843 } 844 } 845 846 static void pmu_add_cpu_aliases(struct list_head *head, struct perf_pmu *pmu) 847 { 848 struct pmu_events_map *map; 849 850 map = perf_pmu__find_map(pmu); 851 if (!map) 852 return; 853 854 pmu_add_cpu_aliases_map(head, pmu, map); 855 } 856 857 void pmu_for_each_sys_event(pmu_sys_event_iter_fn fn, void *data) 858 { 859 int i = 0; 860 861 while (1) { 862 struct pmu_sys_events *event_table; 863 int j = 0; 864 865 event_table = &pmu_sys_event_tables[i++]; 866 867 if (!event_table->table) 868 break; 869 870 while (1) { 871 struct pmu_event *pe = &event_table->table[j++]; 872 int ret; 873 874 if (!pe->name && !pe->metric_group && !pe->metric_name) 875 break; 876 877 ret = fn(pe, data); 878 if (ret) 879 break; 880 } 881 } 882 } 883 884 struct pmu_sys_event_iter_data { 885 struct list_head *head; 886 struct perf_pmu *pmu; 887 }; 888 889 static int pmu_add_sys_aliases_iter_fn(struct pmu_event *pe, void *data) 890 { 891 struct pmu_sys_event_iter_data *idata = data; 892 struct perf_pmu *pmu = idata->pmu; 893 894 if (!pe->name) { 895 if (pe->metric_group || pe->metric_name) 896 return 0; 897 return -EINVAL; 898 } 899 900 if (!pe->compat || !pe->pmu) 901 return 0; 902 903 if (!strcmp(pmu->id, pe->compat) && 904 pmu_uncore_alias_match(pe->pmu, pmu->name)) { 905 __perf_pmu__new_alias(idata->head, NULL, 906 (char *)pe->name, 907 (char *)pe->desc, 908 (char *)pe->event, 909 pe); 910 } 911 912 return 0; 913 } 914 915 static void pmu_add_sys_aliases(struct list_head *head, struct perf_pmu *pmu) 916 { 917 struct pmu_sys_event_iter_data idata = { 918 .head = head, 919 .pmu = pmu, 920 }; 921 922 if (!pmu->id) 923 return; 924 925 pmu_for_each_sys_event(pmu_add_sys_aliases_iter_fn, &idata); 926 } 927 928 struct perf_event_attr * __weak 929 perf_pmu__get_default_config(struct perf_pmu *pmu __maybe_unused) 930 { 931 return NULL; 932 } 933 934 static int pmu_max_precise(const char *name) 935 { 936 char path[PATH_MAX]; 937 int max_precise = -1; 938 939 scnprintf(path, PATH_MAX, 940 "bus/event_source/devices/%s/caps/max_precise", 941 name); 942 943 sysfs__read_int(path, &max_precise); 944 return max_precise; 945 } 946 947 static struct perf_pmu *pmu_lookup(const char *name) 948 { 949 struct perf_pmu *pmu; 950 LIST_HEAD(format); 951 LIST_HEAD(aliases); 952 __u32 type; 953 954 /* 955 * The pmu data we store & need consists of the pmu 956 * type value and format definitions. Load both right 957 * now. 958 */ 959 if (pmu_format(name, &format)) 960 return NULL; 961 962 /* 963 * Check the type first to avoid unnecessary work. 964 */ 965 if (pmu_type(name, &type)) 966 return NULL; 967 968 if (pmu_aliases(name, &aliases)) 969 return NULL; 970 971 pmu = zalloc(sizeof(*pmu)); 972 if (!pmu) 973 return NULL; 974 975 pmu->cpus = pmu_cpumask(name); 976 pmu->name = strdup(name); 977 pmu->type = type; 978 pmu->is_uncore = pmu_is_uncore(name); 979 if (pmu->is_uncore) 980 pmu->id = pmu_id(name); 981 pmu->is_hybrid = perf_pmu__hybrid_mounted(name); 982 pmu->max_precise = pmu_max_precise(name); 983 pmu_add_cpu_aliases(&aliases, pmu); 984 pmu_add_sys_aliases(&aliases, pmu); 985 986 INIT_LIST_HEAD(&pmu->format); 987 INIT_LIST_HEAD(&pmu->aliases); 988 INIT_LIST_HEAD(&pmu->caps); 989 list_splice(&format, &pmu->format); 990 list_splice(&aliases, &pmu->aliases); 991 list_add_tail(&pmu->list, &pmus); 992 993 if (pmu->is_hybrid) 994 list_add_tail(&pmu->hybrid_list, &perf_pmu__hybrid_pmus); 995 996 pmu->default_config = perf_pmu__get_default_config(pmu); 997 998 return pmu; 999 } 1000 1001 static struct perf_pmu *pmu_find(const char *name) 1002 { 1003 struct perf_pmu *pmu; 1004 1005 list_for_each_entry(pmu, &pmus, list) 1006 if (!strcmp(pmu->name, name)) 1007 return pmu; 1008 1009 return NULL; 1010 } 1011 1012 struct perf_pmu *perf_pmu__find_by_type(unsigned int type) 1013 { 1014 struct perf_pmu *pmu; 1015 1016 list_for_each_entry(pmu, &pmus, list) 1017 if (pmu->type == type) 1018 return pmu; 1019 1020 return NULL; 1021 } 1022 1023 struct perf_pmu *perf_pmu__scan(struct perf_pmu *pmu) 1024 { 1025 /* 1026 * pmu iterator: If pmu is NULL, we start at the begin, 1027 * otherwise return the next pmu. Returns NULL on end. 1028 */ 1029 if (!pmu) { 1030 pmu_read_sysfs(); 1031 pmu = list_prepare_entry(pmu, &pmus, list); 1032 } 1033 list_for_each_entry_continue(pmu, &pmus, list) 1034 return pmu; 1035 return NULL; 1036 } 1037 1038 struct perf_pmu *evsel__find_pmu(struct evsel *evsel) 1039 { 1040 struct perf_pmu *pmu = NULL; 1041 1042 while ((pmu = perf_pmu__scan(pmu)) != NULL) { 1043 if (pmu->type == evsel->core.attr.type) 1044 break; 1045 } 1046 1047 return pmu; 1048 } 1049 1050 bool evsel__is_aux_event(struct evsel *evsel) 1051 { 1052 struct perf_pmu *pmu = evsel__find_pmu(evsel); 1053 1054 return pmu && pmu->auxtrace; 1055 } 1056 1057 struct perf_pmu *perf_pmu__find(const char *name) 1058 { 1059 struct perf_pmu *pmu; 1060 1061 /* 1062 * Once PMU is loaded it stays in the list, 1063 * so we keep us from multiple reading/parsing 1064 * the pmu format definitions. 1065 */ 1066 pmu = pmu_find(name); 1067 if (pmu) 1068 return pmu; 1069 1070 return pmu_lookup(name); 1071 } 1072 1073 static struct perf_pmu_format * 1074 pmu_find_format(struct list_head *formats, const char *name) 1075 { 1076 struct perf_pmu_format *format; 1077 1078 list_for_each_entry(format, formats, list) 1079 if (!strcmp(format->name, name)) 1080 return format; 1081 1082 return NULL; 1083 } 1084 1085 __u64 perf_pmu__format_bits(struct list_head *formats, const char *name) 1086 { 1087 struct perf_pmu_format *format = pmu_find_format(formats, name); 1088 __u64 bits = 0; 1089 int fbit; 1090 1091 if (!format) 1092 return 0; 1093 1094 for_each_set_bit(fbit, format->bits, PERF_PMU_FORMAT_BITS) 1095 bits |= 1ULL << fbit; 1096 1097 return bits; 1098 } 1099 1100 int perf_pmu__format_type(struct list_head *formats, const char *name) 1101 { 1102 struct perf_pmu_format *format = pmu_find_format(formats, name); 1103 1104 if (!format) 1105 return -1; 1106 1107 return format->value; 1108 } 1109 1110 /* 1111 * Sets value based on the format definition (format parameter) 1112 * and unformatted value (value parameter). 1113 */ 1114 static void pmu_format_value(unsigned long *format, __u64 value, __u64 *v, 1115 bool zero) 1116 { 1117 unsigned long fbit, vbit; 1118 1119 for (fbit = 0, vbit = 0; fbit < PERF_PMU_FORMAT_BITS; fbit++) { 1120 1121 if (!test_bit(fbit, format)) 1122 continue; 1123 1124 if (value & (1llu << vbit++)) 1125 *v |= (1llu << fbit); 1126 else if (zero) 1127 *v &= ~(1llu << fbit); 1128 } 1129 } 1130 1131 static __u64 pmu_format_max_value(const unsigned long *format) 1132 { 1133 int w; 1134 1135 w = bitmap_weight(format, PERF_PMU_FORMAT_BITS); 1136 if (!w) 1137 return 0; 1138 if (w < 64) 1139 return (1ULL << w) - 1; 1140 return -1; 1141 } 1142 1143 /* 1144 * Term is a string term, and might be a param-term. Try to look up it's value 1145 * in the remaining terms. 1146 * - We have a term like "base-or-format-term=param-term", 1147 * - We need to find the value supplied for "param-term" (with param-term named 1148 * in a config string) later on in the term list. 1149 */ 1150 static int pmu_resolve_param_term(struct parse_events_term *term, 1151 struct list_head *head_terms, 1152 __u64 *value) 1153 { 1154 struct parse_events_term *t; 1155 1156 list_for_each_entry(t, head_terms, list) { 1157 if (t->type_val == PARSE_EVENTS__TERM_TYPE_NUM && 1158 t->config && !strcmp(t->config, term->config)) { 1159 t->used = true; 1160 *value = t->val.num; 1161 return 0; 1162 } 1163 } 1164 1165 if (verbose > 0) 1166 printf("Required parameter '%s' not specified\n", term->config); 1167 1168 return -1; 1169 } 1170 1171 static char *pmu_formats_string(struct list_head *formats) 1172 { 1173 struct perf_pmu_format *format; 1174 char *str = NULL; 1175 struct strbuf buf = STRBUF_INIT; 1176 unsigned i = 0; 1177 1178 if (!formats) 1179 return NULL; 1180 1181 /* sysfs exported terms */ 1182 list_for_each_entry(format, formats, list) 1183 if (strbuf_addf(&buf, i++ ? ",%s" : "%s", format->name) < 0) 1184 goto error; 1185 1186 str = strbuf_detach(&buf, NULL); 1187 error: 1188 strbuf_release(&buf); 1189 1190 return str; 1191 } 1192 1193 /* 1194 * Setup one of config[12] attr members based on the 1195 * user input data - term parameter. 1196 */ 1197 static int pmu_config_term(const char *pmu_name, 1198 struct list_head *formats, 1199 struct perf_event_attr *attr, 1200 struct parse_events_term *term, 1201 struct list_head *head_terms, 1202 bool zero, struct parse_events_error *err) 1203 { 1204 struct perf_pmu_format *format; 1205 __u64 *vp; 1206 __u64 val, max_val; 1207 1208 /* 1209 * If this is a parameter we've already used for parameterized-eval, 1210 * skip it in normal eval. 1211 */ 1212 if (term->used) 1213 return 0; 1214 1215 /* 1216 * Hardcoded terms should be already in, so nothing 1217 * to be done for them. 1218 */ 1219 if (parse_events__is_hardcoded_term(term)) 1220 return 0; 1221 1222 format = pmu_find_format(formats, term->config); 1223 if (!format) { 1224 char *pmu_term = pmu_formats_string(formats); 1225 char *unknown_term; 1226 char *help_msg; 1227 1228 if (asprintf(&unknown_term, 1229 "unknown term '%s' for pmu '%s'", 1230 term->config, pmu_name) < 0) 1231 unknown_term = NULL; 1232 help_msg = parse_events_formats_error_string(pmu_term); 1233 if (err) { 1234 parse_events__handle_error(err, term->err_term, 1235 unknown_term, 1236 help_msg); 1237 } else { 1238 pr_debug("%s (%s)\n", unknown_term, help_msg); 1239 free(unknown_term); 1240 } 1241 free(pmu_term); 1242 return -EINVAL; 1243 } 1244 1245 switch (format->value) { 1246 case PERF_PMU_FORMAT_VALUE_CONFIG: 1247 vp = &attr->config; 1248 break; 1249 case PERF_PMU_FORMAT_VALUE_CONFIG1: 1250 vp = &attr->config1; 1251 break; 1252 case PERF_PMU_FORMAT_VALUE_CONFIG2: 1253 vp = &attr->config2; 1254 break; 1255 default: 1256 return -EINVAL; 1257 } 1258 1259 /* 1260 * Either directly use a numeric term, or try to translate string terms 1261 * using event parameters. 1262 */ 1263 if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) { 1264 if (term->no_value && 1265 bitmap_weight(format->bits, PERF_PMU_FORMAT_BITS) > 1) { 1266 if (err) { 1267 parse_events__handle_error(err, term->err_val, 1268 strdup("no value assigned for term"), 1269 NULL); 1270 } 1271 return -EINVAL; 1272 } 1273 1274 val = term->val.num; 1275 } else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) { 1276 if (strcmp(term->val.str, "?")) { 1277 if (verbose > 0) { 1278 pr_info("Invalid sysfs entry %s=%s\n", 1279 term->config, term->val.str); 1280 } 1281 if (err) { 1282 parse_events__handle_error(err, term->err_val, 1283 strdup("expected numeric value"), 1284 NULL); 1285 } 1286 return -EINVAL; 1287 } 1288 1289 if (pmu_resolve_param_term(term, head_terms, &val)) 1290 return -EINVAL; 1291 } else 1292 return -EINVAL; 1293 1294 max_val = pmu_format_max_value(format->bits); 1295 if (val > max_val) { 1296 if (err) { 1297 char *err_str; 1298 1299 parse_events__handle_error(err, term->err_val, 1300 asprintf(&err_str, 1301 "value too big for format, maximum is %llu", 1302 (unsigned long long)max_val) < 0 1303 ? strdup("value too big for format") 1304 : err_str, 1305 NULL); 1306 return -EINVAL; 1307 } 1308 /* 1309 * Assume we don't care if !err, in which case the value will be 1310 * silently truncated. 1311 */ 1312 } 1313 1314 pmu_format_value(format->bits, val, vp, zero); 1315 return 0; 1316 } 1317 1318 int perf_pmu__config_terms(const char *pmu_name, struct list_head *formats, 1319 struct perf_event_attr *attr, 1320 struct list_head *head_terms, 1321 bool zero, struct parse_events_error *err) 1322 { 1323 struct parse_events_term *term; 1324 1325 list_for_each_entry(term, head_terms, list) { 1326 if (pmu_config_term(pmu_name, formats, attr, term, head_terms, 1327 zero, err)) 1328 return -EINVAL; 1329 } 1330 1331 return 0; 1332 } 1333 1334 /* 1335 * Configures event's 'attr' parameter based on the: 1336 * 1) users input - specified in terms parameter 1337 * 2) pmu format definitions - specified by pmu parameter 1338 */ 1339 int perf_pmu__config(struct perf_pmu *pmu, struct perf_event_attr *attr, 1340 struct list_head *head_terms, 1341 struct parse_events_error *err) 1342 { 1343 bool zero = !!pmu->default_config; 1344 1345 attr->type = pmu->type; 1346 return perf_pmu__config_terms(pmu->name, &pmu->format, attr, 1347 head_terms, zero, err); 1348 } 1349 1350 static struct perf_pmu_alias *pmu_find_alias(struct perf_pmu *pmu, 1351 struct parse_events_term *term) 1352 { 1353 struct perf_pmu_alias *alias; 1354 char *name; 1355 1356 if (parse_events__is_hardcoded_term(term)) 1357 return NULL; 1358 1359 if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) { 1360 if (term->val.num != 1) 1361 return NULL; 1362 if (pmu_find_format(&pmu->format, term->config)) 1363 return NULL; 1364 name = term->config; 1365 } else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) { 1366 if (strcasecmp(term->config, "event")) 1367 return NULL; 1368 name = term->val.str; 1369 } else { 1370 return NULL; 1371 } 1372 1373 list_for_each_entry(alias, &pmu->aliases, list) { 1374 if (!strcasecmp(alias->name, name)) 1375 return alias; 1376 } 1377 return NULL; 1378 } 1379 1380 1381 static int check_info_data(struct perf_pmu_alias *alias, 1382 struct perf_pmu_info *info) 1383 { 1384 /* 1385 * Only one term in event definition can 1386 * define unit, scale and snapshot, fail 1387 * if there's more than one. 1388 */ 1389 if ((info->unit && alias->unit[0]) || 1390 (info->scale && alias->scale) || 1391 (info->snapshot && alias->snapshot)) 1392 return -EINVAL; 1393 1394 if (alias->unit[0]) 1395 info->unit = alias->unit; 1396 1397 if (alias->scale) 1398 info->scale = alias->scale; 1399 1400 if (alias->snapshot) 1401 info->snapshot = alias->snapshot; 1402 1403 return 0; 1404 } 1405 1406 /* 1407 * Find alias in the terms list and replace it with the terms 1408 * defined for the alias 1409 */ 1410 int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms, 1411 struct perf_pmu_info *info) 1412 { 1413 struct parse_events_term *term, *h; 1414 struct perf_pmu_alias *alias; 1415 int ret; 1416 1417 info->per_pkg = false; 1418 1419 /* 1420 * Mark unit and scale as not set 1421 * (different from default values, see below) 1422 */ 1423 info->unit = NULL; 1424 info->scale = 0.0; 1425 info->snapshot = false; 1426 info->metric_expr = NULL; 1427 info->metric_name = NULL; 1428 1429 list_for_each_entry_safe(term, h, head_terms, list) { 1430 alias = pmu_find_alias(pmu, term); 1431 if (!alias) 1432 continue; 1433 ret = pmu_alias_terms(alias, &term->list); 1434 if (ret) 1435 return ret; 1436 1437 ret = check_info_data(alias, info); 1438 if (ret) 1439 return ret; 1440 1441 if (alias->per_pkg) 1442 info->per_pkg = true; 1443 info->metric_expr = alias->metric_expr; 1444 info->metric_name = alias->metric_name; 1445 1446 list_del_init(&term->list); 1447 parse_events_term__delete(term); 1448 } 1449 1450 /* 1451 * if no unit or scale found in aliases, then 1452 * set defaults as for evsel 1453 * unit cannot left to NULL 1454 */ 1455 if (info->unit == NULL) 1456 info->unit = ""; 1457 1458 if (info->scale == 0.0) 1459 info->scale = 1.0; 1460 1461 return 0; 1462 } 1463 1464 int perf_pmu__new_format(struct list_head *list, char *name, 1465 int config, unsigned long *bits) 1466 { 1467 struct perf_pmu_format *format; 1468 1469 format = zalloc(sizeof(*format)); 1470 if (!format) 1471 return -ENOMEM; 1472 1473 format->name = strdup(name); 1474 format->value = config; 1475 memcpy(format->bits, bits, sizeof(format->bits)); 1476 1477 list_add_tail(&format->list, list); 1478 return 0; 1479 } 1480 1481 void perf_pmu__set_format(unsigned long *bits, long from, long to) 1482 { 1483 long b; 1484 1485 if (!to) 1486 to = from; 1487 1488 memset(bits, 0, BITS_TO_BYTES(PERF_PMU_FORMAT_BITS)); 1489 for (b = from; b <= to; b++) 1490 set_bit(b, bits); 1491 } 1492 1493 void perf_pmu__del_formats(struct list_head *formats) 1494 { 1495 struct perf_pmu_format *fmt, *tmp; 1496 1497 list_for_each_entry_safe(fmt, tmp, formats, list) { 1498 list_del(&fmt->list); 1499 free(fmt->name); 1500 free(fmt); 1501 } 1502 } 1503 1504 static int sub_non_neg(int a, int b) 1505 { 1506 if (b > a) 1507 return 0; 1508 return a - b; 1509 } 1510 1511 static char *format_alias(char *buf, int len, struct perf_pmu *pmu, 1512 struct perf_pmu_alias *alias) 1513 { 1514 struct parse_events_term *term; 1515 int used = snprintf(buf, len, "%s/%s", pmu->name, alias->name); 1516 1517 list_for_each_entry(term, &alias->terms, list) { 1518 if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) 1519 used += snprintf(buf + used, sub_non_neg(len, used), 1520 ",%s=%s", term->config, 1521 term->val.str); 1522 } 1523 1524 if (sub_non_neg(len, used) > 0) { 1525 buf[used] = '/'; 1526 used++; 1527 } 1528 if (sub_non_neg(len, used) > 0) { 1529 buf[used] = '\0'; 1530 used++; 1531 } else 1532 buf[len - 1] = '\0'; 1533 1534 return buf; 1535 } 1536 1537 static char *format_alias_or(char *buf, int len, struct perf_pmu *pmu, 1538 struct perf_pmu_alias *alias) 1539 { 1540 snprintf(buf, len, "%s OR %s/%s/", alias->name, pmu->name, alias->name); 1541 return buf; 1542 } 1543 1544 struct sevent { 1545 char *name; 1546 char *desc; 1547 char *topic; 1548 char *str; 1549 char *pmu; 1550 char *metric_expr; 1551 char *metric_name; 1552 int is_cpu; 1553 }; 1554 1555 static int cmp_sevent(const void *a, const void *b) 1556 { 1557 const struct sevent *as = a; 1558 const struct sevent *bs = b; 1559 1560 /* Put extra events last */ 1561 if (!!as->desc != !!bs->desc) 1562 return !!as->desc - !!bs->desc; 1563 if (as->topic && bs->topic) { 1564 int n = strcmp(as->topic, bs->topic); 1565 1566 if (n) 1567 return n; 1568 } 1569 1570 /* Order CPU core events to be first */ 1571 if (as->is_cpu != bs->is_cpu) 1572 return bs->is_cpu - as->is_cpu; 1573 1574 return strcmp(as->name, bs->name); 1575 } 1576 1577 static void wordwrap(char *s, int start, int max, int corr) 1578 { 1579 int column = start; 1580 int n; 1581 1582 while (*s) { 1583 int wlen = strcspn(s, " \t"); 1584 1585 if (column + wlen >= max && column > start) { 1586 printf("\n%*s", start, ""); 1587 column = start + corr; 1588 } 1589 n = printf("%s%.*s", column > start ? " " : "", wlen, s); 1590 if (n <= 0) 1591 break; 1592 s += wlen; 1593 column += n; 1594 s = skip_spaces(s); 1595 } 1596 } 1597 1598 bool is_pmu_core(const char *name) 1599 { 1600 return !strcmp(name, "cpu") || is_arm_pmu_core(name); 1601 } 1602 1603 void print_pmu_events(const char *event_glob, bool name_only, bool quiet_flag, 1604 bool long_desc, bool details_flag, bool deprecated) 1605 { 1606 struct perf_pmu *pmu; 1607 struct perf_pmu_alias *alias; 1608 char buf[1024]; 1609 int printed = 0; 1610 int len, j; 1611 struct sevent *aliases; 1612 int numdesc = 0; 1613 int columns = pager_get_columns(); 1614 char *topic = NULL; 1615 1616 pmu = NULL; 1617 len = 0; 1618 while ((pmu = perf_pmu__scan(pmu)) != NULL) { 1619 list_for_each_entry(alias, &pmu->aliases, list) 1620 len++; 1621 if (pmu->selectable) 1622 len++; 1623 } 1624 aliases = zalloc(sizeof(struct sevent) * len); 1625 if (!aliases) 1626 goto out_enomem; 1627 pmu = NULL; 1628 j = 0; 1629 while ((pmu = perf_pmu__scan(pmu)) != NULL) { 1630 list_for_each_entry(alias, &pmu->aliases, list) { 1631 char *name = alias->desc ? alias->name : 1632 format_alias(buf, sizeof(buf), pmu, alias); 1633 bool is_cpu = is_pmu_core(pmu->name); 1634 1635 if (alias->deprecated && !deprecated) 1636 continue; 1637 1638 if (event_glob != NULL && 1639 !(strglobmatch_nocase(name, event_glob) || 1640 (!is_cpu && strglobmatch_nocase(alias->name, 1641 event_glob)) || 1642 (alias->topic && 1643 strglobmatch_nocase(alias->topic, event_glob)))) 1644 continue; 1645 1646 if (is_cpu && !name_only && !alias->desc) 1647 name = format_alias_or(buf, sizeof(buf), pmu, alias); 1648 1649 aliases[j].name = name; 1650 if (is_cpu && !name_only && !alias->desc) 1651 aliases[j].name = format_alias_or(buf, 1652 sizeof(buf), 1653 pmu, alias); 1654 aliases[j].name = strdup(aliases[j].name); 1655 if (!aliases[j].name) 1656 goto out_enomem; 1657 1658 aliases[j].desc = long_desc ? alias->long_desc : 1659 alias->desc; 1660 aliases[j].topic = alias->topic; 1661 aliases[j].str = alias->str; 1662 aliases[j].pmu = pmu->name; 1663 aliases[j].metric_expr = alias->metric_expr; 1664 aliases[j].metric_name = alias->metric_name; 1665 aliases[j].is_cpu = is_cpu; 1666 j++; 1667 } 1668 if (pmu->selectable && 1669 (event_glob == NULL || strglobmatch(pmu->name, event_glob))) { 1670 char *s; 1671 if (asprintf(&s, "%s//", pmu->name) < 0) 1672 goto out_enomem; 1673 aliases[j].name = s; 1674 j++; 1675 } 1676 } 1677 len = j; 1678 qsort(aliases, len, sizeof(struct sevent), cmp_sevent); 1679 for (j = 0; j < len; j++) { 1680 /* Skip duplicates */ 1681 if (j > 0 && !strcmp(aliases[j].name, aliases[j - 1].name)) 1682 continue; 1683 if (name_only) { 1684 printf("%s ", aliases[j].name); 1685 continue; 1686 } 1687 if (aliases[j].desc && !quiet_flag) { 1688 if (numdesc++ == 0) 1689 printf("\n"); 1690 if (aliases[j].topic && (!topic || 1691 strcmp(topic, aliases[j].topic))) { 1692 printf("%s%s:\n", topic ? "\n" : "", 1693 aliases[j].topic); 1694 topic = aliases[j].topic; 1695 } 1696 printf(" %-50s\n", aliases[j].name); 1697 printf("%*s", 8, "["); 1698 wordwrap(aliases[j].desc, 8, columns, 0); 1699 printf("]\n"); 1700 if (details_flag) { 1701 printf("%*s%s/%s/ ", 8, "", aliases[j].pmu, aliases[j].str); 1702 if (aliases[j].metric_name) 1703 printf(" MetricName: %s", aliases[j].metric_name); 1704 if (aliases[j].metric_expr) 1705 printf(" MetricExpr: %s", aliases[j].metric_expr); 1706 putchar('\n'); 1707 } 1708 } else 1709 printf(" %-50s [Kernel PMU event]\n", aliases[j].name); 1710 printed++; 1711 } 1712 if (printed && pager_in_use()) 1713 printf("\n"); 1714 out_free: 1715 for (j = 0; j < len; j++) 1716 zfree(&aliases[j].name); 1717 zfree(&aliases); 1718 return; 1719 1720 out_enomem: 1721 printf("FATAL: not enough memory to print PMU events\n"); 1722 if (aliases) 1723 goto out_free; 1724 } 1725 1726 bool pmu_have_event(const char *pname, const char *name) 1727 { 1728 struct perf_pmu *pmu; 1729 struct perf_pmu_alias *alias; 1730 1731 pmu = NULL; 1732 while ((pmu = perf_pmu__scan(pmu)) != NULL) { 1733 if (strcmp(pname, pmu->name)) 1734 continue; 1735 list_for_each_entry(alias, &pmu->aliases, list) 1736 if (!strcmp(alias->name, name)) 1737 return true; 1738 } 1739 return false; 1740 } 1741 1742 static FILE *perf_pmu__open_file(struct perf_pmu *pmu, const char *name) 1743 { 1744 char path[PATH_MAX]; 1745 const char *sysfs; 1746 1747 sysfs = sysfs__mountpoint(); 1748 if (!sysfs) 1749 return NULL; 1750 1751 snprintf(path, PATH_MAX, 1752 "%s" EVENT_SOURCE_DEVICE_PATH "%s/%s", sysfs, pmu->name, name); 1753 if (!file_available(path)) 1754 return NULL; 1755 return fopen(path, "r"); 1756 } 1757 1758 int perf_pmu__scan_file(struct perf_pmu *pmu, const char *name, const char *fmt, 1759 ...) 1760 { 1761 va_list args; 1762 FILE *file; 1763 int ret = EOF; 1764 1765 va_start(args, fmt); 1766 file = perf_pmu__open_file(pmu, name); 1767 if (file) { 1768 ret = vfscanf(file, fmt, args); 1769 fclose(file); 1770 } 1771 va_end(args); 1772 return ret; 1773 } 1774 1775 static int perf_pmu__new_caps(struct list_head *list, char *name, char *value) 1776 { 1777 struct perf_pmu_caps *caps = zalloc(sizeof(*caps)); 1778 1779 if (!caps) 1780 return -ENOMEM; 1781 1782 caps->name = strdup(name); 1783 if (!caps->name) 1784 goto free_caps; 1785 caps->value = strndup(value, strlen(value) - 1); 1786 if (!caps->value) 1787 goto free_name; 1788 list_add_tail(&caps->list, list); 1789 return 0; 1790 1791 free_name: 1792 zfree(caps->name); 1793 free_caps: 1794 free(caps); 1795 1796 return -ENOMEM; 1797 } 1798 1799 /* 1800 * Reading/parsing the given pmu capabilities, which should be located at: 1801 * /sys/bus/event_source/devices/<dev>/caps as sysfs group attributes. 1802 * Return the number of capabilities 1803 */ 1804 int perf_pmu__caps_parse(struct perf_pmu *pmu) 1805 { 1806 struct stat st; 1807 char caps_path[PATH_MAX]; 1808 const char *sysfs = sysfs__mountpoint(); 1809 DIR *caps_dir; 1810 struct dirent *evt_ent; 1811 int nr_caps = 0; 1812 1813 if (!sysfs) 1814 return -1; 1815 1816 snprintf(caps_path, PATH_MAX, 1817 "%s" EVENT_SOURCE_DEVICE_PATH "%s/caps", sysfs, pmu->name); 1818 1819 if (stat(caps_path, &st) < 0) 1820 return 0; /* no error if caps does not exist */ 1821 1822 caps_dir = opendir(caps_path); 1823 if (!caps_dir) 1824 return -EINVAL; 1825 1826 while ((evt_ent = readdir(caps_dir)) != NULL) { 1827 char path[PATH_MAX + NAME_MAX + 1]; 1828 char *name = evt_ent->d_name; 1829 char value[128]; 1830 FILE *file; 1831 1832 if (!strcmp(name, ".") || !strcmp(name, "..")) 1833 continue; 1834 1835 snprintf(path, sizeof(path), "%s/%s", caps_path, name); 1836 1837 file = fopen(path, "r"); 1838 if (!file) 1839 continue; 1840 1841 if (!fgets(value, sizeof(value), file) || 1842 (perf_pmu__new_caps(&pmu->caps, name, value) < 0)) { 1843 fclose(file); 1844 continue; 1845 } 1846 1847 nr_caps++; 1848 fclose(file); 1849 } 1850 1851 closedir(caps_dir); 1852 1853 return nr_caps; 1854 } 1855 1856 void perf_pmu__warn_invalid_config(struct perf_pmu *pmu, __u64 config, 1857 char *name) 1858 { 1859 struct perf_pmu_format *format; 1860 __u64 masks = 0, bits; 1861 char buf[100]; 1862 unsigned int i; 1863 1864 list_for_each_entry(format, &pmu->format, list) { 1865 if (format->value != PERF_PMU_FORMAT_VALUE_CONFIG) 1866 continue; 1867 1868 for_each_set_bit(i, format->bits, PERF_PMU_FORMAT_BITS) 1869 masks |= 1ULL << i; 1870 } 1871 1872 /* 1873 * Kernel doesn't export any valid format bits. 1874 */ 1875 if (masks == 0) 1876 return; 1877 1878 bits = config & ~masks; 1879 if (bits == 0) 1880 return; 1881 1882 bitmap_scnprintf((unsigned long *)&bits, sizeof(bits) * 8, buf, sizeof(buf)); 1883 1884 pr_warning("WARNING: event '%s' not valid (bits %s of config " 1885 "'%llx' not supported by kernel)!\n", 1886 name ?: "N/A", buf, config); 1887 } 1888 1889 bool perf_pmu__has_hybrid(void) 1890 { 1891 if (!hybrid_scanned) { 1892 hybrid_scanned = true; 1893 perf_pmu__scan(NULL); 1894 } 1895 1896 return !list_empty(&perf_pmu__hybrid_pmus); 1897 } 1898 1899 int perf_pmu__match(char *pattern, char *name, char *tok) 1900 { 1901 if (fnmatch(pattern, name, 0)) 1902 return -1; 1903 1904 if (tok && !perf_pmu__valid_suffix(name, tok)) 1905 return -1; 1906 1907 return 0; 1908 } 1909