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 /* 746 * Suffix must be in form tok_{digits}, or tok{digits}, or same as pmu_name 747 * to be valid. 748 */ 749 static bool perf_pmu__valid_suffix(const char *pmu_name, char *tok) 750 { 751 const char *p; 752 753 if (strncmp(pmu_name, tok, strlen(tok))) 754 return false; 755 756 p = pmu_name + strlen(tok); 757 if (*p == 0) 758 return true; 759 760 if (*p == '_') 761 ++p; 762 763 /* Ensure we end in a number */ 764 while (1) { 765 if (!isdigit(*p)) 766 return false; 767 if (*(++p) == 0) 768 break; 769 } 770 771 return true; 772 } 773 774 bool pmu_uncore_alias_match(const char *pmu_name, const char *name) 775 { 776 char *tmp = NULL, *tok, *str; 777 bool res; 778 779 str = strdup(pmu_name); 780 if (!str) 781 return false; 782 783 /* 784 * uncore alias may be from different PMU with common prefix 785 */ 786 tok = strtok_r(str, ",", &tmp); 787 if (strncmp(pmu_name, tok, strlen(tok))) { 788 res = false; 789 goto out; 790 } 791 792 /* 793 * Match more complex aliases where the alias name is a comma-delimited 794 * list of tokens, orderly contained in the matching PMU name. 795 * 796 * Example: For alias "socket,pmuname" and PMU "socketX_pmunameY", we 797 * match "socket" in "socketX_pmunameY" and then "pmuname" in 798 * "pmunameY". 799 */ 800 while (1) { 801 char *next_tok = strtok_r(NULL, ",", &tmp); 802 803 name = strstr(name, tok); 804 if (!name || 805 (!next_tok && !perf_pmu__valid_suffix(name, tok))) { 806 res = false; 807 goto out; 808 } 809 if (!next_tok) 810 break; 811 tok = next_tok; 812 name += strlen(tok); 813 } 814 815 res = true; 816 out: 817 free(str); 818 return res; 819 } 820 821 /* 822 * From the pmu_events_map, find the table of PMU events that corresponds 823 * to the current running CPU. Then, add all PMU events from that table 824 * as aliases. 825 */ 826 void pmu_add_cpu_aliases_map(struct list_head *head, struct perf_pmu *pmu, 827 struct pmu_events_map *map) 828 { 829 int i; 830 const char *name = pmu->name; 831 /* 832 * Found a matching PMU events table. Create aliases 833 */ 834 i = 0; 835 while (1) { 836 const char *cpu_name = is_arm_pmu_core(name) ? name : "cpu"; 837 struct pmu_event *pe = &map->table[i++]; 838 const char *pname = pe->pmu ? pe->pmu : cpu_name; 839 840 if (!pe->name) { 841 if (pe->metric_group || pe->metric_name) 842 continue; 843 break; 844 } 845 846 if (pmu_is_uncore(name) && 847 pmu_uncore_alias_match(pname, name)) 848 goto new_alias; 849 850 if (strcmp(pname, name)) 851 continue; 852 853 new_alias: 854 /* need type casts to override 'const' */ 855 __perf_pmu__new_alias(head, NULL, (char *)pe->name, 856 (char *)pe->desc, (char *)pe->event, 857 pe); 858 } 859 } 860 861 static void pmu_add_cpu_aliases(struct list_head *head, struct perf_pmu *pmu) 862 { 863 struct pmu_events_map *map; 864 865 map = perf_pmu__find_map(pmu); 866 if (!map) 867 return; 868 869 pmu_add_cpu_aliases_map(head, pmu, map); 870 } 871 872 void pmu_for_each_sys_event(pmu_sys_event_iter_fn fn, void *data) 873 { 874 int i = 0; 875 876 while (1) { 877 struct pmu_sys_events *event_table; 878 int j = 0; 879 880 event_table = &pmu_sys_event_tables[i++]; 881 882 if (!event_table->table) 883 break; 884 885 while (1) { 886 struct pmu_event *pe = &event_table->table[j++]; 887 int ret; 888 889 if (!pe->name && !pe->metric_group && !pe->metric_name) 890 break; 891 892 ret = fn(pe, data); 893 if (ret) 894 break; 895 } 896 } 897 } 898 899 struct pmu_sys_event_iter_data { 900 struct list_head *head; 901 struct perf_pmu *pmu; 902 }; 903 904 static int pmu_add_sys_aliases_iter_fn(struct pmu_event *pe, void *data) 905 { 906 struct pmu_sys_event_iter_data *idata = data; 907 struct perf_pmu *pmu = idata->pmu; 908 909 if (!pe->name) { 910 if (pe->metric_group || pe->metric_name) 911 return 0; 912 return -EINVAL; 913 } 914 915 if (!pe->compat || !pe->pmu) 916 return 0; 917 918 if (!strcmp(pmu->id, pe->compat) && 919 pmu_uncore_alias_match(pe->pmu, pmu->name)) { 920 __perf_pmu__new_alias(idata->head, NULL, 921 (char *)pe->name, 922 (char *)pe->desc, 923 (char *)pe->event, 924 pe); 925 } 926 927 return 0; 928 } 929 930 static void pmu_add_sys_aliases(struct list_head *head, struct perf_pmu *pmu) 931 { 932 struct pmu_sys_event_iter_data idata = { 933 .head = head, 934 .pmu = pmu, 935 }; 936 937 if (!pmu->id) 938 return; 939 940 pmu_for_each_sys_event(pmu_add_sys_aliases_iter_fn, &idata); 941 } 942 943 struct perf_event_attr * __weak 944 perf_pmu__get_default_config(struct perf_pmu *pmu __maybe_unused) 945 { 946 return NULL; 947 } 948 949 static int pmu_max_precise(const char *name) 950 { 951 char path[PATH_MAX]; 952 int max_precise = -1; 953 954 scnprintf(path, PATH_MAX, 955 "bus/event_source/devices/%s/caps/max_precise", 956 name); 957 958 sysfs__read_int(path, &max_precise); 959 return max_precise; 960 } 961 962 static struct perf_pmu *pmu_lookup(const char *name) 963 { 964 struct perf_pmu *pmu; 965 LIST_HEAD(format); 966 LIST_HEAD(aliases); 967 __u32 type; 968 bool is_hybrid = perf_pmu__hybrid_mounted(name); 969 970 /* 971 * Check pmu name for hybrid and the pmu may be invalid in sysfs 972 */ 973 if (!strncmp(name, "cpu_", 4) && !is_hybrid) 974 return NULL; 975 976 /* 977 * The pmu data we store & need consists of the pmu 978 * type value and format definitions. Load both right 979 * now. 980 */ 981 if (pmu_format(name, &format)) 982 return NULL; 983 984 /* 985 * Check the type first to avoid unnecessary work. 986 */ 987 if (pmu_type(name, &type)) 988 return NULL; 989 990 if (pmu_aliases(name, &aliases)) 991 return NULL; 992 993 pmu = zalloc(sizeof(*pmu)); 994 if (!pmu) 995 return NULL; 996 997 pmu->cpus = pmu_cpumask(name); 998 pmu->name = strdup(name); 999 pmu->type = type; 1000 pmu->is_uncore = pmu_is_uncore(name); 1001 if (pmu->is_uncore) 1002 pmu->id = pmu_id(name); 1003 pmu->is_hybrid = is_hybrid; 1004 pmu->max_precise = pmu_max_precise(name); 1005 pmu_add_cpu_aliases(&aliases, pmu); 1006 pmu_add_sys_aliases(&aliases, pmu); 1007 1008 INIT_LIST_HEAD(&pmu->format); 1009 INIT_LIST_HEAD(&pmu->aliases); 1010 INIT_LIST_HEAD(&pmu->caps); 1011 list_splice(&format, &pmu->format); 1012 list_splice(&aliases, &pmu->aliases); 1013 list_add_tail(&pmu->list, &pmus); 1014 1015 if (pmu->is_hybrid) 1016 list_add_tail(&pmu->hybrid_list, &perf_pmu__hybrid_pmus); 1017 1018 pmu->default_config = perf_pmu__get_default_config(pmu); 1019 1020 return pmu; 1021 } 1022 1023 static struct perf_pmu *pmu_find(const char *name) 1024 { 1025 struct perf_pmu *pmu; 1026 1027 list_for_each_entry(pmu, &pmus, list) 1028 if (!strcmp(pmu->name, name)) 1029 return pmu; 1030 1031 return NULL; 1032 } 1033 1034 struct perf_pmu *perf_pmu__find_by_type(unsigned int type) 1035 { 1036 struct perf_pmu *pmu; 1037 1038 list_for_each_entry(pmu, &pmus, list) 1039 if (pmu->type == type) 1040 return pmu; 1041 1042 return NULL; 1043 } 1044 1045 struct perf_pmu *perf_pmu__scan(struct perf_pmu *pmu) 1046 { 1047 /* 1048 * pmu iterator: If pmu is NULL, we start at the begin, 1049 * otherwise return the next pmu. Returns NULL on end. 1050 */ 1051 if (!pmu) { 1052 pmu_read_sysfs(); 1053 pmu = list_prepare_entry(pmu, &pmus, list); 1054 } 1055 list_for_each_entry_continue(pmu, &pmus, list) 1056 return pmu; 1057 return NULL; 1058 } 1059 1060 struct perf_pmu *evsel__find_pmu(struct evsel *evsel) 1061 { 1062 struct perf_pmu *pmu = NULL; 1063 1064 while ((pmu = perf_pmu__scan(pmu)) != NULL) { 1065 if (pmu->type == evsel->core.attr.type) 1066 break; 1067 } 1068 1069 return pmu; 1070 } 1071 1072 bool evsel__is_aux_event(struct evsel *evsel) 1073 { 1074 struct perf_pmu *pmu = evsel__find_pmu(evsel); 1075 1076 return pmu && pmu->auxtrace; 1077 } 1078 1079 struct perf_pmu *perf_pmu__find(const char *name) 1080 { 1081 struct perf_pmu *pmu; 1082 1083 /* 1084 * Once PMU is loaded it stays in the list, 1085 * so we keep us from multiple reading/parsing 1086 * the pmu format definitions. 1087 */ 1088 pmu = pmu_find(name); 1089 if (pmu) 1090 return pmu; 1091 1092 return pmu_lookup(name); 1093 } 1094 1095 static struct perf_pmu_format * 1096 pmu_find_format(struct list_head *formats, const char *name) 1097 { 1098 struct perf_pmu_format *format; 1099 1100 list_for_each_entry(format, formats, list) 1101 if (!strcmp(format->name, name)) 1102 return format; 1103 1104 return NULL; 1105 } 1106 1107 __u64 perf_pmu__format_bits(struct list_head *formats, const char *name) 1108 { 1109 struct perf_pmu_format *format = pmu_find_format(formats, name); 1110 __u64 bits = 0; 1111 int fbit; 1112 1113 if (!format) 1114 return 0; 1115 1116 for_each_set_bit(fbit, format->bits, PERF_PMU_FORMAT_BITS) 1117 bits |= 1ULL << fbit; 1118 1119 return bits; 1120 } 1121 1122 int perf_pmu__format_type(struct list_head *formats, const char *name) 1123 { 1124 struct perf_pmu_format *format = pmu_find_format(formats, name); 1125 1126 if (!format) 1127 return -1; 1128 1129 return format->value; 1130 } 1131 1132 /* 1133 * Sets value based on the format definition (format parameter) 1134 * and unformatted value (value parameter). 1135 */ 1136 static void pmu_format_value(unsigned long *format, __u64 value, __u64 *v, 1137 bool zero) 1138 { 1139 unsigned long fbit, vbit; 1140 1141 for (fbit = 0, vbit = 0; fbit < PERF_PMU_FORMAT_BITS; fbit++) { 1142 1143 if (!test_bit(fbit, format)) 1144 continue; 1145 1146 if (value & (1llu << vbit++)) 1147 *v |= (1llu << fbit); 1148 else if (zero) 1149 *v &= ~(1llu << fbit); 1150 } 1151 } 1152 1153 static __u64 pmu_format_max_value(const unsigned long *format) 1154 { 1155 int w; 1156 1157 w = bitmap_weight(format, PERF_PMU_FORMAT_BITS); 1158 if (!w) 1159 return 0; 1160 if (w < 64) 1161 return (1ULL << w) - 1; 1162 return -1; 1163 } 1164 1165 /* 1166 * Term is a string term, and might be a param-term. Try to look up it's value 1167 * in the remaining terms. 1168 * - We have a term like "base-or-format-term=param-term", 1169 * - We need to find the value supplied for "param-term" (with param-term named 1170 * in a config string) later on in the term list. 1171 */ 1172 static int pmu_resolve_param_term(struct parse_events_term *term, 1173 struct list_head *head_terms, 1174 __u64 *value) 1175 { 1176 struct parse_events_term *t; 1177 1178 list_for_each_entry(t, head_terms, list) { 1179 if (t->type_val == PARSE_EVENTS__TERM_TYPE_NUM && 1180 t->config && !strcmp(t->config, term->config)) { 1181 t->used = true; 1182 *value = t->val.num; 1183 return 0; 1184 } 1185 } 1186 1187 if (verbose > 0) 1188 printf("Required parameter '%s' not specified\n", term->config); 1189 1190 return -1; 1191 } 1192 1193 static char *pmu_formats_string(struct list_head *formats) 1194 { 1195 struct perf_pmu_format *format; 1196 char *str = NULL; 1197 struct strbuf buf = STRBUF_INIT; 1198 unsigned i = 0; 1199 1200 if (!formats) 1201 return NULL; 1202 1203 /* sysfs exported terms */ 1204 list_for_each_entry(format, formats, list) 1205 if (strbuf_addf(&buf, i++ ? ",%s" : "%s", format->name) < 0) 1206 goto error; 1207 1208 str = strbuf_detach(&buf, NULL); 1209 error: 1210 strbuf_release(&buf); 1211 1212 return str; 1213 } 1214 1215 /* 1216 * Setup one of config[12] attr members based on the 1217 * user input data - term parameter. 1218 */ 1219 static int pmu_config_term(const char *pmu_name, 1220 struct list_head *formats, 1221 struct perf_event_attr *attr, 1222 struct parse_events_term *term, 1223 struct list_head *head_terms, 1224 bool zero, struct parse_events_error *err) 1225 { 1226 struct perf_pmu_format *format; 1227 __u64 *vp; 1228 __u64 val, max_val; 1229 1230 /* 1231 * If this is a parameter we've already used for parameterized-eval, 1232 * skip it in normal eval. 1233 */ 1234 if (term->used) 1235 return 0; 1236 1237 /* 1238 * Hardcoded terms should be already in, so nothing 1239 * to be done for them. 1240 */ 1241 if (parse_events__is_hardcoded_term(term)) 1242 return 0; 1243 1244 format = pmu_find_format(formats, term->config); 1245 if (!format) { 1246 char *pmu_term = pmu_formats_string(formats); 1247 char *unknown_term; 1248 char *help_msg; 1249 1250 if (asprintf(&unknown_term, 1251 "unknown term '%s' for pmu '%s'", 1252 term->config, pmu_name) < 0) 1253 unknown_term = NULL; 1254 help_msg = parse_events_formats_error_string(pmu_term); 1255 if (err) { 1256 parse_events__handle_error(err, term->err_term, 1257 unknown_term, 1258 help_msg); 1259 } else { 1260 pr_debug("%s (%s)\n", unknown_term, help_msg); 1261 free(unknown_term); 1262 } 1263 free(pmu_term); 1264 return -EINVAL; 1265 } 1266 1267 switch (format->value) { 1268 case PERF_PMU_FORMAT_VALUE_CONFIG: 1269 vp = &attr->config; 1270 break; 1271 case PERF_PMU_FORMAT_VALUE_CONFIG1: 1272 vp = &attr->config1; 1273 break; 1274 case PERF_PMU_FORMAT_VALUE_CONFIG2: 1275 vp = &attr->config2; 1276 break; 1277 default: 1278 return -EINVAL; 1279 } 1280 1281 /* 1282 * Either directly use a numeric term, or try to translate string terms 1283 * using event parameters. 1284 */ 1285 if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) { 1286 if (term->no_value && 1287 bitmap_weight(format->bits, PERF_PMU_FORMAT_BITS) > 1) { 1288 if (err) { 1289 parse_events__handle_error(err, term->err_val, 1290 strdup("no value assigned for term"), 1291 NULL); 1292 } 1293 return -EINVAL; 1294 } 1295 1296 val = term->val.num; 1297 } else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) { 1298 if (strcmp(term->val.str, "?")) { 1299 if (verbose > 0) { 1300 pr_info("Invalid sysfs entry %s=%s\n", 1301 term->config, term->val.str); 1302 } 1303 if (err) { 1304 parse_events__handle_error(err, term->err_val, 1305 strdup("expected numeric value"), 1306 NULL); 1307 } 1308 return -EINVAL; 1309 } 1310 1311 if (pmu_resolve_param_term(term, head_terms, &val)) 1312 return -EINVAL; 1313 } else 1314 return -EINVAL; 1315 1316 max_val = pmu_format_max_value(format->bits); 1317 if (val > max_val) { 1318 if (err) { 1319 char *err_str; 1320 1321 parse_events__handle_error(err, term->err_val, 1322 asprintf(&err_str, 1323 "value too big for format, maximum is %llu", 1324 (unsigned long long)max_val) < 0 1325 ? strdup("value too big for format") 1326 : err_str, 1327 NULL); 1328 return -EINVAL; 1329 } 1330 /* 1331 * Assume we don't care if !err, in which case the value will be 1332 * silently truncated. 1333 */ 1334 } 1335 1336 pmu_format_value(format->bits, val, vp, zero); 1337 return 0; 1338 } 1339 1340 int perf_pmu__config_terms(const char *pmu_name, struct list_head *formats, 1341 struct perf_event_attr *attr, 1342 struct list_head *head_terms, 1343 bool zero, struct parse_events_error *err) 1344 { 1345 struct parse_events_term *term; 1346 1347 list_for_each_entry(term, head_terms, list) { 1348 if (pmu_config_term(pmu_name, formats, attr, term, head_terms, 1349 zero, err)) 1350 return -EINVAL; 1351 } 1352 1353 return 0; 1354 } 1355 1356 /* 1357 * Configures event's 'attr' parameter based on the: 1358 * 1) users input - specified in terms parameter 1359 * 2) pmu format definitions - specified by pmu parameter 1360 */ 1361 int perf_pmu__config(struct perf_pmu *pmu, struct perf_event_attr *attr, 1362 struct list_head *head_terms, 1363 struct parse_events_error *err) 1364 { 1365 bool zero = !!pmu->default_config; 1366 1367 attr->type = pmu->type; 1368 return perf_pmu__config_terms(pmu->name, &pmu->format, attr, 1369 head_terms, zero, err); 1370 } 1371 1372 static struct perf_pmu_alias *pmu_find_alias(struct perf_pmu *pmu, 1373 struct parse_events_term *term) 1374 { 1375 struct perf_pmu_alias *alias; 1376 char *name; 1377 1378 if (parse_events__is_hardcoded_term(term)) 1379 return NULL; 1380 1381 if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) { 1382 if (term->val.num != 1) 1383 return NULL; 1384 if (pmu_find_format(&pmu->format, term->config)) 1385 return NULL; 1386 name = term->config; 1387 } else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) { 1388 if (strcasecmp(term->config, "event")) 1389 return NULL; 1390 name = term->val.str; 1391 } else { 1392 return NULL; 1393 } 1394 1395 list_for_each_entry(alias, &pmu->aliases, list) { 1396 if (!strcasecmp(alias->name, name)) 1397 return alias; 1398 } 1399 return NULL; 1400 } 1401 1402 1403 static int check_info_data(struct perf_pmu_alias *alias, 1404 struct perf_pmu_info *info) 1405 { 1406 /* 1407 * Only one term in event definition can 1408 * define unit, scale and snapshot, fail 1409 * if there's more than one. 1410 */ 1411 if ((info->unit && alias->unit[0]) || 1412 (info->scale && alias->scale) || 1413 (info->snapshot && alias->snapshot)) 1414 return -EINVAL; 1415 1416 if (alias->unit[0]) 1417 info->unit = alias->unit; 1418 1419 if (alias->scale) 1420 info->scale = alias->scale; 1421 1422 if (alias->snapshot) 1423 info->snapshot = alias->snapshot; 1424 1425 return 0; 1426 } 1427 1428 /* 1429 * Find alias in the terms list and replace it with the terms 1430 * defined for the alias 1431 */ 1432 int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms, 1433 struct perf_pmu_info *info) 1434 { 1435 struct parse_events_term *term, *h; 1436 struct perf_pmu_alias *alias; 1437 int ret; 1438 1439 info->per_pkg = false; 1440 1441 /* 1442 * Mark unit and scale as not set 1443 * (different from default values, see below) 1444 */ 1445 info->unit = NULL; 1446 info->scale = 0.0; 1447 info->snapshot = false; 1448 info->metric_expr = NULL; 1449 info->metric_name = NULL; 1450 1451 list_for_each_entry_safe(term, h, head_terms, list) { 1452 alias = pmu_find_alias(pmu, term); 1453 if (!alias) 1454 continue; 1455 ret = pmu_alias_terms(alias, &term->list); 1456 if (ret) 1457 return ret; 1458 1459 ret = check_info_data(alias, info); 1460 if (ret) 1461 return ret; 1462 1463 if (alias->per_pkg) 1464 info->per_pkg = true; 1465 info->metric_expr = alias->metric_expr; 1466 info->metric_name = alias->metric_name; 1467 1468 list_del_init(&term->list); 1469 parse_events_term__delete(term); 1470 } 1471 1472 /* 1473 * if no unit or scale found in aliases, then 1474 * set defaults as for evsel 1475 * unit cannot left to NULL 1476 */ 1477 if (info->unit == NULL) 1478 info->unit = ""; 1479 1480 if (info->scale == 0.0) 1481 info->scale = 1.0; 1482 1483 return 0; 1484 } 1485 1486 int perf_pmu__new_format(struct list_head *list, char *name, 1487 int config, unsigned long *bits) 1488 { 1489 struct perf_pmu_format *format; 1490 1491 format = zalloc(sizeof(*format)); 1492 if (!format) 1493 return -ENOMEM; 1494 1495 format->name = strdup(name); 1496 format->value = config; 1497 memcpy(format->bits, bits, sizeof(format->bits)); 1498 1499 list_add_tail(&format->list, list); 1500 return 0; 1501 } 1502 1503 void perf_pmu__set_format(unsigned long *bits, long from, long to) 1504 { 1505 long b; 1506 1507 if (!to) 1508 to = from; 1509 1510 memset(bits, 0, BITS_TO_BYTES(PERF_PMU_FORMAT_BITS)); 1511 for (b = from; b <= to; b++) 1512 set_bit(b, bits); 1513 } 1514 1515 void perf_pmu__del_formats(struct list_head *formats) 1516 { 1517 struct perf_pmu_format *fmt, *tmp; 1518 1519 list_for_each_entry_safe(fmt, tmp, formats, list) { 1520 list_del(&fmt->list); 1521 free(fmt->name); 1522 free(fmt); 1523 } 1524 } 1525 1526 static int sub_non_neg(int a, int b) 1527 { 1528 if (b > a) 1529 return 0; 1530 return a - b; 1531 } 1532 1533 static char *format_alias(char *buf, int len, struct perf_pmu *pmu, 1534 struct perf_pmu_alias *alias) 1535 { 1536 struct parse_events_term *term; 1537 int used = snprintf(buf, len, "%s/%s", pmu->name, alias->name); 1538 1539 list_for_each_entry(term, &alias->terms, list) { 1540 if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) 1541 used += snprintf(buf + used, sub_non_neg(len, used), 1542 ",%s=%s", term->config, 1543 term->val.str); 1544 } 1545 1546 if (sub_non_neg(len, used) > 0) { 1547 buf[used] = '/'; 1548 used++; 1549 } 1550 if (sub_non_neg(len, used) > 0) { 1551 buf[used] = '\0'; 1552 used++; 1553 } else 1554 buf[len - 1] = '\0'; 1555 1556 return buf; 1557 } 1558 1559 static char *format_alias_or(char *buf, int len, struct perf_pmu *pmu, 1560 struct perf_pmu_alias *alias) 1561 { 1562 snprintf(buf, len, "%s OR %s/%s/", alias->name, pmu->name, alias->name); 1563 return buf; 1564 } 1565 1566 struct sevent { 1567 char *name; 1568 char *desc; 1569 char *topic; 1570 char *str; 1571 char *pmu; 1572 char *metric_expr; 1573 char *metric_name; 1574 int is_cpu; 1575 }; 1576 1577 static int cmp_sevent(const void *a, const void *b) 1578 { 1579 const struct sevent *as = a; 1580 const struct sevent *bs = b; 1581 1582 /* Put extra events last */ 1583 if (!!as->desc != !!bs->desc) 1584 return !!as->desc - !!bs->desc; 1585 if (as->topic && bs->topic) { 1586 int n = strcmp(as->topic, bs->topic); 1587 1588 if (n) 1589 return n; 1590 } 1591 1592 /* Order CPU core events to be first */ 1593 if (as->is_cpu != bs->is_cpu) 1594 return bs->is_cpu - as->is_cpu; 1595 1596 return strcmp(as->name, bs->name); 1597 } 1598 1599 static void wordwrap(char *s, int start, int max, int corr) 1600 { 1601 int column = start; 1602 int n; 1603 1604 while (*s) { 1605 int wlen = strcspn(s, " \t"); 1606 1607 if (column + wlen >= max && column > start) { 1608 printf("\n%*s", start, ""); 1609 column = start + corr; 1610 } 1611 n = printf("%s%.*s", column > start ? " " : "", wlen, s); 1612 if (n <= 0) 1613 break; 1614 s += wlen; 1615 column += n; 1616 s = skip_spaces(s); 1617 } 1618 } 1619 1620 bool is_pmu_core(const char *name) 1621 { 1622 return !strcmp(name, "cpu") || is_arm_pmu_core(name); 1623 } 1624 1625 void print_pmu_events(const char *event_glob, bool name_only, bool quiet_flag, 1626 bool long_desc, bool details_flag, bool deprecated) 1627 { 1628 struct perf_pmu *pmu; 1629 struct perf_pmu_alias *alias; 1630 char buf[1024]; 1631 int printed = 0; 1632 int len, j; 1633 struct sevent *aliases; 1634 int numdesc = 0; 1635 int columns = pager_get_columns(); 1636 char *topic = NULL; 1637 1638 pmu = NULL; 1639 len = 0; 1640 while ((pmu = perf_pmu__scan(pmu)) != NULL) { 1641 list_for_each_entry(alias, &pmu->aliases, list) 1642 len++; 1643 if (pmu->selectable) 1644 len++; 1645 } 1646 aliases = zalloc(sizeof(struct sevent) * len); 1647 if (!aliases) 1648 goto out_enomem; 1649 pmu = NULL; 1650 j = 0; 1651 while ((pmu = perf_pmu__scan(pmu)) != NULL) { 1652 list_for_each_entry(alias, &pmu->aliases, list) { 1653 char *name = alias->desc ? alias->name : 1654 format_alias(buf, sizeof(buf), pmu, alias); 1655 bool is_cpu = is_pmu_core(pmu->name); 1656 1657 if (alias->deprecated && !deprecated) 1658 continue; 1659 1660 if (event_glob != NULL && 1661 !(strglobmatch_nocase(name, event_glob) || 1662 (!is_cpu && strglobmatch_nocase(alias->name, 1663 event_glob)) || 1664 (alias->topic && 1665 strglobmatch_nocase(alias->topic, event_glob)))) 1666 continue; 1667 1668 if (is_cpu && !name_only && !alias->desc) 1669 name = format_alias_or(buf, sizeof(buf), pmu, alias); 1670 1671 aliases[j].name = name; 1672 if (is_cpu && !name_only && !alias->desc) 1673 aliases[j].name = format_alias_or(buf, 1674 sizeof(buf), 1675 pmu, alias); 1676 aliases[j].name = strdup(aliases[j].name); 1677 if (!aliases[j].name) 1678 goto out_enomem; 1679 1680 aliases[j].desc = long_desc ? alias->long_desc : 1681 alias->desc; 1682 aliases[j].topic = alias->topic; 1683 aliases[j].str = alias->str; 1684 aliases[j].pmu = pmu->name; 1685 aliases[j].metric_expr = alias->metric_expr; 1686 aliases[j].metric_name = alias->metric_name; 1687 aliases[j].is_cpu = is_cpu; 1688 j++; 1689 } 1690 if (pmu->selectable && 1691 (event_glob == NULL || strglobmatch(pmu->name, event_glob))) { 1692 char *s; 1693 if (asprintf(&s, "%s//", pmu->name) < 0) 1694 goto out_enomem; 1695 aliases[j].name = s; 1696 j++; 1697 } 1698 } 1699 len = j; 1700 qsort(aliases, len, sizeof(struct sevent), cmp_sevent); 1701 for (j = 0; j < len; j++) { 1702 /* Skip duplicates */ 1703 if (j > 0 && !strcmp(aliases[j].name, aliases[j - 1].name)) 1704 continue; 1705 if (name_only) { 1706 printf("%s ", aliases[j].name); 1707 continue; 1708 } 1709 if (aliases[j].desc && !quiet_flag) { 1710 if (numdesc++ == 0) 1711 printf("\n"); 1712 if (aliases[j].topic && (!topic || 1713 strcmp(topic, aliases[j].topic))) { 1714 printf("%s%s:\n", topic ? "\n" : "", 1715 aliases[j].topic); 1716 topic = aliases[j].topic; 1717 } 1718 printf(" %-50s\n", aliases[j].name); 1719 printf("%*s", 8, "["); 1720 wordwrap(aliases[j].desc, 8, columns, 0); 1721 printf("]\n"); 1722 if (details_flag) { 1723 printf("%*s%s/%s/ ", 8, "", aliases[j].pmu, aliases[j].str); 1724 if (aliases[j].metric_name) 1725 printf(" MetricName: %s", aliases[j].metric_name); 1726 if (aliases[j].metric_expr) 1727 printf(" MetricExpr: %s", aliases[j].metric_expr); 1728 putchar('\n'); 1729 } 1730 } else 1731 printf(" %-50s [Kernel PMU event]\n", aliases[j].name); 1732 printed++; 1733 } 1734 if (printed && pager_in_use()) 1735 printf("\n"); 1736 out_free: 1737 for (j = 0; j < len; j++) 1738 zfree(&aliases[j].name); 1739 zfree(&aliases); 1740 return; 1741 1742 out_enomem: 1743 printf("FATAL: not enough memory to print PMU events\n"); 1744 if (aliases) 1745 goto out_free; 1746 } 1747 1748 bool pmu_have_event(const char *pname, const char *name) 1749 { 1750 struct perf_pmu *pmu; 1751 struct perf_pmu_alias *alias; 1752 1753 pmu = NULL; 1754 while ((pmu = perf_pmu__scan(pmu)) != NULL) { 1755 if (strcmp(pname, pmu->name)) 1756 continue; 1757 list_for_each_entry(alias, &pmu->aliases, list) 1758 if (!strcmp(alias->name, name)) 1759 return true; 1760 } 1761 return false; 1762 } 1763 1764 static FILE *perf_pmu__open_file(struct perf_pmu *pmu, const char *name) 1765 { 1766 char path[PATH_MAX]; 1767 const char *sysfs; 1768 1769 sysfs = sysfs__mountpoint(); 1770 if (!sysfs) 1771 return NULL; 1772 1773 snprintf(path, PATH_MAX, 1774 "%s" EVENT_SOURCE_DEVICE_PATH "%s/%s", sysfs, pmu->name, name); 1775 if (!file_available(path)) 1776 return NULL; 1777 return fopen(path, "r"); 1778 } 1779 1780 int perf_pmu__scan_file(struct perf_pmu *pmu, const char *name, const char *fmt, 1781 ...) 1782 { 1783 va_list args; 1784 FILE *file; 1785 int ret = EOF; 1786 1787 va_start(args, fmt); 1788 file = perf_pmu__open_file(pmu, name); 1789 if (file) { 1790 ret = vfscanf(file, fmt, args); 1791 fclose(file); 1792 } 1793 va_end(args); 1794 return ret; 1795 } 1796 1797 static int perf_pmu__new_caps(struct list_head *list, char *name, char *value) 1798 { 1799 struct perf_pmu_caps *caps = zalloc(sizeof(*caps)); 1800 1801 if (!caps) 1802 return -ENOMEM; 1803 1804 caps->name = strdup(name); 1805 if (!caps->name) 1806 goto free_caps; 1807 caps->value = strndup(value, strlen(value) - 1); 1808 if (!caps->value) 1809 goto free_name; 1810 list_add_tail(&caps->list, list); 1811 return 0; 1812 1813 free_name: 1814 zfree(caps->name); 1815 free_caps: 1816 free(caps); 1817 1818 return -ENOMEM; 1819 } 1820 1821 /* 1822 * Reading/parsing the given pmu capabilities, which should be located at: 1823 * /sys/bus/event_source/devices/<dev>/caps as sysfs group attributes. 1824 * Return the number of capabilities 1825 */ 1826 int perf_pmu__caps_parse(struct perf_pmu *pmu) 1827 { 1828 struct stat st; 1829 char caps_path[PATH_MAX]; 1830 const char *sysfs = sysfs__mountpoint(); 1831 DIR *caps_dir; 1832 struct dirent *evt_ent; 1833 int nr_caps = 0; 1834 1835 if (!sysfs) 1836 return -1; 1837 1838 snprintf(caps_path, PATH_MAX, 1839 "%s" EVENT_SOURCE_DEVICE_PATH "%s/caps", sysfs, pmu->name); 1840 1841 if (stat(caps_path, &st) < 0) 1842 return 0; /* no error if caps does not exist */ 1843 1844 caps_dir = opendir(caps_path); 1845 if (!caps_dir) 1846 return -EINVAL; 1847 1848 while ((evt_ent = readdir(caps_dir)) != NULL) { 1849 char path[PATH_MAX + NAME_MAX + 1]; 1850 char *name = evt_ent->d_name; 1851 char value[128]; 1852 FILE *file; 1853 1854 if (!strcmp(name, ".") || !strcmp(name, "..")) 1855 continue; 1856 1857 snprintf(path, sizeof(path), "%s/%s", caps_path, name); 1858 1859 file = fopen(path, "r"); 1860 if (!file) 1861 continue; 1862 1863 if (!fgets(value, sizeof(value), file) || 1864 (perf_pmu__new_caps(&pmu->caps, name, value) < 0)) { 1865 fclose(file); 1866 continue; 1867 } 1868 1869 nr_caps++; 1870 fclose(file); 1871 } 1872 1873 closedir(caps_dir); 1874 1875 return nr_caps; 1876 } 1877 1878 void perf_pmu__warn_invalid_config(struct perf_pmu *pmu, __u64 config, 1879 char *name) 1880 { 1881 struct perf_pmu_format *format; 1882 __u64 masks = 0, bits; 1883 char buf[100]; 1884 unsigned int i; 1885 1886 list_for_each_entry(format, &pmu->format, list) { 1887 if (format->value != PERF_PMU_FORMAT_VALUE_CONFIG) 1888 continue; 1889 1890 for_each_set_bit(i, format->bits, PERF_PMU_FORMAT_BITS) 1891 masks |= 1ULL << i; 1892 } 1893 1894 /* 1895 * Kernel doesn't export any valid format bits. 1896 */ 1897 if (masks == 0) 1898 return; 1899 1900 bits = config & ~masks; 1901 if (bits == 0) 1902 return; 1903 1904 bitmap_scnprintf((unsigned long *)&bits, sizeof(bits) * 8, buf, sizeof(buf)); 1905 1906 pr_warning("WARNING: event '%s' not valid (bits %s of config " 1907 "'%llx' not supported by kernel)!\n", 1908 name ?: "N/A", buf, config); 1909 } 1910 1911 bool perf_pmu__has_hybrid(void) 1912 { 1913 if (!hybrid_scanned) { 1914 hybrid_scanned = true; 1915 perf_pmu__scan(NULL); 1916 } 1917 1918 return !list_empty(&perf_pmu__hybrid_pmus); 1919 } 1920 1921 int perf_pmu__match(char *pattern, char *name, char *tok) 1922 { 1923 if (fnmatch(pattern, name, 0)) 1924 return -1; 1925 1926 if (tok && !perf_pmu__valid_suffix(name, tok)) 1927 return -1; 1928 1929 return 0; 1930 } 1931