tools/perf/util/pmu.c

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

DEFINITIONS
