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Merge tag 'block-5.11-2021-01-10' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / tools / perf / util / pmu.c
blob44ef28302fc77cbdb681684701e60bb42fc96874
1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/list.h>
3 #include <linux/compiler.h>
4 #include <linux/string.h>
5 #include <linux/zalloc.h>
6 #include <subcmd/pager.h>
7 #include <sys/types.h>
8 #include <errno.h>
9 #include <fcntl.h>
10 #include <sys/stat.h>
11 #include <unistd.h>
12 #include <stdio.h>
13 #include <stdbool.h>
14 #include <stdarg.h>
15 #include <dirent.h>
16 #include <api/fs/fs.h>
17 #include <locale.h>
18 #include <regex.h>
19 #include <perf/cpumap.h>
20 #include "debug.h"
21 #include "evsel.h"
22 #include "pmu.h"
23 #include "parse-events.h"
24 #include "header.h"
25 #include "string2.h"
26 #include "strbuf.h"
27 #include "fncache.h"
28
29 struct perf_pmu perf_pmu__fake;
30
31 struct perf_pmu_format {
32 char *name;
33 int value;
34 DECLARE_BITMAP(bits, PERF_PMU_FORMAT_BITS);
35 struct list_head list;
36 };
37
38 int perf_pmu_parse(struct list_head *list, char *name);
39 extern FILE *perf_pmu_in;
40
41 static LIST_HEAD(pmus);
42
43 /*
44 * Parse & process all the sysfs attributes located under
45 * the directory specified in 'dir' parameter.
46 */
47 int perf_pmu__format_parse(char *dir, struct list_head *head)
48 {
49 struct dirent *evt_ent;
50 DIR *format_dir;
51 int ret = 0;
52
53 format_dir = opendir(dir);
54 if (!format_dir)
55 return -EINVAL;
56
57 while (!ret && (evt_ent = readdir(format_dir))) {
58 char path[PATH_MAX];
59 char *name = evt_ent->d_name;
60 FILE *file;
61
62 if (!strcmp(name, ".") || !strcmp(name, ".."))
63 continue;
64
65 snprintf(path, PATH_MAX, "%s/%s", dir, name);
66
67 ret = -EINVAL;
68 file = fopen(path, "r");
69 if (!file)
70 break;
71
72 perf_pmu_in = file;
73 ret = perf_pmu_parse(head, name);
74 fclose(file);
75 }
76
77 closedir(format_dir);
78 return ret;
79 }
80
81 /*
82 * Reading/parsing the default pmu format definition, which should be
83 * located at:
84 * /sys/bus/event_source/devices/<dev>/format as sysfs group attributes.
85 */
86 static int pmu_format(const char *name, struct list_head *format)
87 {
88 char path[PATH_MAX];
89 const char *sysfs = sysfs__mountpoint();
90
91 if (!sysfs)
92 return -1;
93
94 snprintf(path, PATH_MAX,
95 "%s" EVENT_SOURCE_DEVICE_PATH "%s/format", sysfs, name);
96
97 if (!file_available(path))
98 return 0;
99
100 if (perf_pmu__format_parse(path, format))
101 return -1;
102
103 return 0;
104 }
105
106 int perf_pmu__convert_scale(const char *scale, char **end, double *sval)
107 {
108 char *lc;
109 int ret = 0;
110
111 /*
112 * save current locale
113 */
114 lc = setlocale(LC_NUMERIC, NULL);
115
116 /*
117 * The lc string may be allocated in static storage,
118 * so get a dynamic copy to make it survive setlocale
119 * call below.
120 */
121 lc = strdup(lc);
122 if (!lc) {
123 ret = -ENOMEM;
124 goto out;
125 }
126
127 /*
128 * force to C locale to ensure kernel
129 * scale string is converted correctly.
130 * kernel uses default C locale.
131 */
132 setlocale(LC_NUMERIC, "C");
133
134 *sval = strtod(scale, end);
135
136 out:
137 /* restore locale */
138 setlocale(LC_NUMERIC, lc);
139 free(lc);
140 return ret;
141 }
142
143 static int perf_pmu__parse_scale(struct perf_pmu_alias *alias, char *dir, char *name)
144 {
145 struct stat st;
146 ssize_t sret;
147 char scale[128];
148 int fd, ret = -1;
149 char path[PATH_MAX];
150
151 scnprintf(path, PATH_MAX, "%s/%s.scale", dir, name);
152
153 fd = open(path, O_RDONLY);
154 if (fd == -1)
155 return -1;
156
157 if (fstat(fd, &st) < 0)
158 goto error;
159
160 sret = read(fd, scale, sizeof(scale)-1);
161 if (sret < 0)
162 goto error;
163
164 if (scale[sret - 1] == '\n')
165 scale[sret - 1] = '\0';
166 else
167 scale[sret] = '\0';
168
169 ret = perf_pmu__convert_scale(scale, NULL, &alias->scale);
170 error:
171 close(fd);
172 return ret;
173 }
174
175 static int perf_pmu__parse_unit(struct perf_pmu_alias *alias, char *dir, char *name)
176 {
177 char path[PATH_MAX];
178 ssize_t sret;
179 int fd;
180
181 scnprintf(path, PATH_MAX, "%s/%s.unit", dir, name);
182
183 fd = open(path, O_RDONLY);
184 if (fd == -1)
185 return -1;
186
187 sret = read(fd, alias->unit, UNIT_MAX_LEN);
188 if (sret < 0)
189 goto error;
190
191 close(fd);
192
193 if (alias->unit[sret - 1] == '\n')
194 alias->unit[sret - 1] = '\0';
195 else
196 alias->unit[sret] = '\0';
197
198 return 0;
199 error:
200 close(fd);
201 alias->unit[0] = '\0';
202 return -1;
203 }
204
205 static int
206 perf_pmu__parse_per_pkg(struct perf_pmu_alias *alias, char *dir, char *name)
207 {
208 char path[PATH_MAX];
209 int fd;
210
211 scnprintf(path, PATH_MAX, "%s/%s.per-pkg", dir, name);
212
213 fd = open(path, O_RDONLY);
214 if (fd == -1)
215 return -1;
216
217 close(fd);
218
219 alias->per_pkg = true;
220 return 0;
221 }
222
223 static int perf_pmu__parse_snapshot(struct perf_pmu_alias *alias,
224 char *dir, char *name)
225 {
226 char path[PATH_MAX];
227 int fd;
228
229 scnprintf(path, PATH_MAX, "%s/%s.snapshot", dir, name);
230
231 fd = open(path, O_RDONLY);
232 if (fd == -1)
233 return -1;
234
235 alias->snapshot = true;
236 close(fd);
237 return 0;
238 }
239
240 static void perf_pmu_assign_str(char *name, const char *field, char **old_str,
241 char **new_str)
242 {
243 if (!*old_str)
244 goto set_new;
245
246 if (*new_str) { /* Have new string, check with old */
247 if (strcasecmp(*old_str, *new_str))
248 pr_debug("alias %s differs in field '%s'\n",
249 name, field);
250 zfree(old_str);
251 } else /* Nothing new --> keep old string */
252 return;
253 set_new:
254 *old_str = *new_str;
255 *new_str = NULL;
256 }
257
258 static void perf_pmu_update_alias(struct perf_pmu_alias *old,
259 struct perf_pmu_alias *newalias)
260 {
261 perf_pmu_assign_str(old->name, "desc", &old->desc, &newalias->desc);
262 perf_pmu_assign_str(old->name, "long_desc", &old->long_desc,
263 &newalias->long_desc);
264 perf_pmu_assign_str(old->name, "topic", &old->topic, &newalias->topic);
265 perf_pmu_assign_str(old->name, "metric_expr", &old->metric_expr,
266 &newalias->metric_expr);
267 perf_pmu_assign_str(old->name, "metric_name", &old->metric_name,
268 &newalias->metric_name);
269 perf_pmu_assign_str(old->name, "value", &old->str, &newalias->str);
270 old->scale = newalias->scale;
271 old->per_pkg = newalias->per_pkg;
272 old->snapshot = newalias->snapshot;
273 memcpy(old->unit, newalias->unit, sizeof(old->unit));
274 }
275
276 /* Delete an alias entry. */
277 void perf_pmu_free_alias(struct perf_pmu_alias *newalias)
278 {
279 zfree(&newalias->name);
280 zfree(&newalias->desc);
281 zfree(&newalias->long_desc);
282 zfree(&newalias->topic);
283 zfree(&newalias->str);
284 zfree(&newalias->metric_expr);
285 zfree(&newalias->metric_name);
286 parse_events_terms__purge(&newalias->terms);
287 free(newalias);
288 }
289
290 /* Merge an alias, search in alias list. If this name is already
291 * present merge both of them to combine all information.
292 */
293 static bool perf_pmu_merge_alias(struct perf_pmu_alias *newalias,
294 struct list_head *alist)
295 {
296 struct perf_pmu_alias *a;
297
298 list_for_each_entry(a, alist, list) {
299 if (!strcasecmp(newalias->name, a->name)) {
300 perf_pmu_update_alias(a, newalias);
301 perf_pmu_free_alias(newalias);
302 return true;
303 }
304 }
305 return false;
306 }
307
308 static int __perf_pmu__new_alias(struct list_head *list, char *dir, char *name,
309 char *desc, char *val,
310 char *long_desc, char *topic,
311 char *unit, char *perpkg,
312 char *metric_expr,
313 char *metric_name,
314 char *deprecated)
315 {
316 struct parse_events_term *term;
317 struct perf_pmu_alias *alias;
318 int ret;
319 int num;
320 char newval[256];
321
322 alias = malloc(sizeof(*alias));
323 if (!alias)
324 return -ENOMEM;
325
326 INIT_LIST_HEAD(&alias->terms);
327 alias->scale = 1.0;
328 alias->unit[0] = '\0';
329 alias->per_pkg = false;
330 alias->snapshot = false;
331 alias->deprecated = false;
332
333 ret = parse_events_terms(&alias->terms, val);
334 if (ret) {
335 pr_err("Cannot parse alias %s: %d\n", val, ret);
336 free(alias);
337 return ret;
338 }
339
340 /* Scan event and remove leading zeroes, spaces, newlines, some
341 * platforms have terms specified as
342 * event=0x0091 (read from files ../<PMU>/events/<FILE>
343 * and terms specified as event=0x91 (read from JSON files).
344 *
345 * Rebuild string to make alias->str member comparable.
346 */
347 memset(newval, 0, sizeof(newval));
348 ret = 0;
349 list_for_each_entry(term, &alias->terms, list) {
350 if (ret)
351 ret += scnprintf(newval + ret, sizeof(newval) - ret,
352 ",");
353 if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM)
354 ret += scnprintf(newval + ret, sizeof(newval) - ret,
355 "%s=%#x", term->config, term->val.num);
356 else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR)
357 ret += scnprintf(newval + ret, sizeof(newval) - ret,
358 "%s=%s", term->config, term->val.str);
359 }
360
361 alias->name = strdup(name);
362 if (dir) {
363 /*
364 * load unit name and scale if available
365 */
366 perf_pmu__parse_unit(alias, dir, name);
367 perf_pmu__parse_scale(alias, dir, name);
368 perf_pmu__parse_per_pkg(alias, dir, name);
369 perf_pmu__parse_snapshot(alias, dir, name);
370 }
371
372 alias->metric_expr = metric_expr ? strdup(metric_expr) : NULL;
373 alias->metric_name = metric_name ? strdup(metric_name): NULL;
374 alias->desc = desc ? strdup(desc) : NULL;
375 alias->long_desc = long_desc ? strdup(long_desc) :
376 desc ? strdup(desc) : NULL;
377 alias->topic = topic ? strdup(topic) : NULL;
378 if (unit) {
379 if (perf_pmu__convert_scale(unit, &unit, &alias->scale) < 0)
380 return -1;
381 snprintf(alias->unit, sizeof(alias->unit), "%s", unit);
382 }
383 alias->per_pkg = perpkg && sscanf(perpkg, "%d", &num) == 1 && num == 1;
384 alias->str = strdup(newval);
385
386 if (deprecated)
387 alias->deprecated = true;
388
389 if (!perf_pmu_merge_alias(alias, list))
390 list_add_tail(&alias->list, list);
391
392 return 0;
393 }
394
395 static int perf_pmu__new_alias(struct list_head *list, char *dir, char *name, FILE *file)
396 {
397 char buf[256];
398 int ret;
399
400 ret = fread(buf, 1, sizeof(buf), file);
401 if (ret == 0)
402 return -EINVAL;
403
404 buf[ret] = 0;
405
406 /* Remove trailing newline from sysfs file */
407 strim(buf);
408
409 return __perf_pmu__new_alias(list, dir, name, NULL, buf, NULL, NULL, NULL,
410 NULL, NULL, NULL, NULL);
411 }
412
413 static inline bool pmu_alias_info_file(char *name)
414 {
415 size_t len;
416
417 len = strlen(name);
418 if (len > 5 && !strcmp(name + len - 5, ".unit"))
419 return true;
420 if (len > 6 && !strcmp(name + len - 6, ".scale"))
421 return true;
422 if (len > 8 && !strcmp(name + len - 8, ".per-pkg"))
423 return true;
424 if (len > 9 && !strcmp(name + len - 9, ".snapshot"))
425 return true;
426
427 return false;
428 }
429
430 /*
431 * Process all the sysfs attributes located under the directory
432 * specified in 'dir' parameter.
433 */
434 static int pmu_aliases_parse(char *dir, struct list_head *head)
435 {
436 struct dirent *evt_ent;
437 DIR *event_dir;
438
439 event_dir = opendir(dir);
440 if (!event_dir)
441 return -EINVAL;
442
443 while ((evt_ent = readdir(event_dir))) {
444 char path[PATH_MAX];
445 char *name = evt_ent->d_name;
446 FILE *file;
447
448 if (!strcmp(name, ".") || !strcmp(name, ".."))
449 continue;
450
451 /*
452 * skip info files parsed in perf_pmu__new_alias()
453 */
454 if (pmu_alias_info_file(name))
455 continue;
456
457 scnprintf(path, PATH_MAX, "%s/%s", dir, name);
458
459 file = fopen(path, "r");
460 if (!file) {
461 pr_debug("Cannot open %s\n", path);
462 continue;
463 }
464
465 if (perf_pmu__new_alias(head, dir, name, file) < 0)
466 pr_debug("Cannot set up %s\n", name);
467 fclose(file);
468 }
469
470 closedir(event_dir);
471 return 0;
472 }
473
474 /*
475 * Reading the pmu event aliases definition, which should be located at:
476 * /sys/bus/event_source/devices/<dev>/events as sysfs group attributes.
477 */
478 static int pmu_aliases(const char *name, struct list_head *head)
479 {
480 char path[PATH_MAX];
481 const char *sysfs = sysfs__mountpoint();
482
483 if (!sysfs)
484 return -1;
485
486 snprintf(path, PATH_MAX,
487 "%s/bus/event_source/devices/%s/events", sysfs, name);
488
489 if (!file_available(path))
490 return 0;
491
492 if (pmu_aliases_parse(path, head))
493 return -1;
494
495 return 0;
496 }
497
498 static int pmu_alias_terms(struct perf_pmu_alias *alias,
499 struct list_head *terms)
500 {
501 struct parse_events_term *term, *cloned;
502 LIST_HEAD(list);
503 int ret;
504
505 list_for_each_entry(term, &alias->terms, list) {
506 ret = parse_events_term__clone(&cloned, term);
507 if (ret) {
508 parse_events_terms__purge(&list);
509 return ret;
510 }
511 /*
512 * Weak terms don't override command line options,
513 * which we don't want for implicit terms in aliases.
514 */
515 cloned->weak = true;
516 list_add_tail(&cloned->list, &list);
517 }
518 list_splice(&list, terms);
519 return 0;
520 }
521
522 /*
523 * Reading/parsing the default pmu type value, which should be
524 * located at:
525 * /sys/bus/event_source/devices/<dev>/type as sysfs attribute.
526 */
527 static int pmu_type(const char *name, __u32 *type)
528 {
529 char path[PATH_MAX];
530 FILE *file;
531 int ret = 0;
532 const char *sysfs = sysfs__mountpoint();
533
534 if (!sysfs)
535 return -1;
536
537 snprintf(path, PATH_MAX,
538 "%s" EVENT_SOURCE_DEVICE_PATH "%s/type", sysfs, name);
539
540 if (access(path, R_OK) < 0)
541 return -1;
542
543 file = fopen(path, "r");
544 if (!file)
545 return -EINVAL;
546
547 if (1 != fscanf(file, "%u", type))
548 ret = -1;
549
550 fclose(file);
551 return ret;
552 }
553
554 /* Add all pmus in sysfs to pmu list: */
555 static void pmu_read_sysfs(void)
556 {
557 char path[PATH_MAX];
558 DIR *dir;
559 struct dirent *dent;
560 const char *sysfs = sysfs__mountpoint();
561
562 if (!sysfs)
563 return;
564
565 snprintf(path, PATH_MAX,
566 "%s" EVENT_SOURCE_DEVICE_PATH, sysfs);
567
568 dir = opendir(path);
569 if (!dir)
570 return;
571
572 while ((dent = readdir(dir))) {
573 if (!strcmp(dent->d_name, ".") || !strcmp(dent->d_name, ".."))
574 continue;
575 /* add to static LIST_HEAD(pmus): */
576 perf_pmu__find(dent->d_name);
577 }
578
579 closedir(dir);
580 }
581
582 static struct perf_cpu_map *__pmu_cpumask(const char *path)
583 {
584 FILE *file;
585 struct perf_cpu_map *cpus;
586
587 file = fopen(path, "r");
588 if (!file)
589 return NULL;
590
591 cpus = perf_cpu_map__read(file);
592 fclose(file);
593 return cpus;
594 }
595
596 /*
597 * Uncore PMUs have a "cpumask" file under sysfs. CPU PMUs (e.g. on arm/arm64)
598 * may have a "cpus" file.
599 */
600 #define SYS_TEMPLATE_ID "./bus/event_source/devices/%s/identifier"
601 #define CPUS_TEMPLATE_UNCORE "%s/bus/event_source/devices/%s/cpumask"
602 #define CPUS_TEMPLATE_CPU "%s/bus/event_source/devices/%s/cpus"
603
604 static struct perf_cpu_map *pmu_cpumask(const char *name)
605 {
606 char path[PATH_MAX];
607 struct perf_cpu_map *cpus;
608 const char *sysfs = sysfs__mountpoint();
609 const char *templates[] = {
610 CPUS_TEMPLATE_UNCORE,
611 CPUS_TEMPLATE_CPU,
612 NULL
613 };
614 const char **template;
615
616 if (!sysfs)
617 return NULL;
618
619 for (template = templates; *template; template++) {
620 snprintf(path, PATH_MAX, *template, sysfs, name);
621 cpus = __pmu_cpumask(path);
622 if (cpus)
623 return cpus;
624 }
625
626 return NULL;
627 }
628
629 static bool pmu_is_uncore(const char *name)
630 {
631 char path[PATH_MAX];
632 const char *sysfs;
633
634 sysfs = sysfs__mountpoint();
635 snprintf(path, PATH_MAX, CPUS_TEMPLATE_UNCORE, sysfs, name);
636 return file_available(path);
637 }
638
639 static char *pmu_id(const char *name)
640 {
641 char path[PATH_MAX], *str;
642 size_t len;
643
644 snprintf(path, PATH_MAX, SYS_TEMPLATE_ID, name);
645
646 if (sysfs__read_str(path, &str, &len) < 0)
647 return NULL;
648
649 str[len - 1] = 0; /* remove line feed */
650
651 return str;
652 }
653
654 /*
655 * PMU CORE devices have different name other than cpu in sysfs on some
656 * platforms.
657 * Looking for possible sysfs files to identify the arm core device.
658 */
659 static int is_arm_pmu_core(const char *name)
660 {
661 char path[PATH_MAX];
662 const char *sysfs = sysfs__mountpoint();
663
664 if (!sysfs)
665 return 0;
666
667 /* Look for cpu sysfs (specific to arm) */
668 scnprintf(path, PATH_MAX, "%s/bus/event_source/devices/%s/cpus",
669 sysfs, name);
670 return file_available(path);
671 }
672
673 static char *perf_pmu__getcpuid(struct perf_pmu *pmu)
674 {
675 char *cpuid;
676 static bool printed;
677
678 cpuid = getenv("PERF_CPUID");
679 if (cpuid)
680 cpuid = strdup(cpuid);
681 if (!cpuid)
682 cpuid = get_cpuid_str(pmu);
683 if (!cpuid)
684 return NULL;
685
686 if (!printed) {
687 pr_debug("Using CPUID %s\n", cpuid);
688 printed = true;
689 }
690 return cpuid;
691 }
692
693 struct pmu_events_map *perf_pmu__find_map(struct perf_pmu *pmu)
694 {
695 struct pmu_events_map *map;
696 char *cpuid = perf_pmu__getcpuid(pmu);
697 int i;
698
699 /* on some platforms which uses cpus map, cpuid can be NULL for
700 * PMUs other than CORE PMUs.
701 */
702 if (!cpuid)
703 return NULL;
704
705 i = 0;
706 for (;;) {
707 map = &pmu_events_map[i++];
708 if (!map->table) {
709 map = NULL;
710 break;
711 }
712
713 if (!strcmp_cpuid_str(map->cpuid, cpuid))
714 break;
715 }
716 free(cpuid);
717 return map;
718 }
719
720 bool pmu_uncore_alias_match(const char *pmu_name, const char *name)
721 {
722 char *tmp = NULL, *tok, *str;
723 bool res;
724
725 str = strdup(pmu_name);
726 if (!str)
727 return false;
728
729 /*
730 * uncore alias may be from different PMU with common prefix
731 */
732 tok = strtok_r(str, ",", &tmp);
733 if (strncmp(pmu_name, tok, strlen(tok))) {
734 res = false;
735 goto out;
736 }
737
738 /*
739 * Match more complex aliases where the alias name is a comma-delimited
740 * list of tokens, orderly contained in the matching PMU name.
741 *
742 * Example: For alias "socket,pmuname" and PMU "socketX_pmunameY", we
743 * match "socket" in "socketX_pmunameY" and then "pmuname" in
744 * "pmunameY".
745 */
746 for (; tok; name += strlen(tok), tok = strtok_r(NULL, ",", &tmp)) {
747 name = strstr(name, tok);
748 if (!name) {
749 res = false;
750 goto out;
751 }
752 }
753
754 res = true;
755 out:
756 free(str);
757 return res;
758 }
759
760 /*
761 * From the pmu_events_map, find the table of PMU events that corresponds
762 * to the current running CPU. Then, add all PMU events from that table
763 * as aliases.
764 */
765 void pmu_add_cpu_aliases_map(struct list_head *head, struct perf_pmu *pmu,
766 struct pmu_events_map *map)
767 {
768 int i;
769 const char *name = pmu->name;
770 /*
771 * Found a matching PMU events table. Create aliases
772 */
773 i = 0;
774 while (1) {
775 const char *cpu_name = is_arm_pmu_core(name) ? name : "cpu";
776 struct pmu_event *pe = &map->table[i++];
777 const char *pname = pe->pmu ? pe->pmu : cpu_name;
778
779 if (!pe->name) {
780 if (pe->metric_group || pe->metric_name)
781 continue;
782 break;
783 }
784
785 if (pmu_is_uncore(name) &&
786 pmu_uncore_alias_match(pname, name))
787 goto new_alias;
788
789 if (strcmp(pname, name))
790 continue;
791
792 new_alias:
793 /* need type casts to override 'const' */
794 __perf_pmu__new_alias(head, NULL, (char *)pe->name,
795 (char *)pe->desc, (char *)pe->event,
796 (char *)pe->long_desc, (char *)pe->topic,
797 (char *)pe->unit, (char *)pe->perpkg,
798 (char *)pe->metric_expr,
799 (char *)pe->metric_name,
800 (char *)pe->deprecated);
801 }
802 }
803
804 static void pmu_add_cpu_aliases(struct list_head *head, struct perf_pmu *pmu)
805 {
806 struct pmu_events_map *map;
807
808 map = perf_pmu__find_map(pmu);
809 if (!map)
810 return;
811
812 pmu_add_cpu_aliases_map(head, pmu, map);
813 }
814
815 void pmu_for_each_sys_event(pmu_sys_event_iter_fn fn, void *data)
816 {
817 int i = 0;
818
819 while (1) {
820 struct pmu_sys_events *event_table;
821 int j = 0;
822
823 event_table = &pmu_sys_event_tables[i++];
824
825 if (!event_table->table)
826 break;
827
828 while (1) {
829 struct pmu_event *pe = &event_table->table[j++];
830 int ret;
831
832 if (!pe->name && !pe->metric_group && !pe->metric_name)
833 break;
834
835 ret = fn(pe, data);
836 if (ret)
837 break;
838 }
839 }
840 }
841
842 struct pmu_sys_event_iter_data {
843 struct list_head *head;
844 struct perf_pmu *pmu;
845 };
846
847 static int pmu_add_sys_aliases_iter_fn(struct pmu_event *pe, void *data)
848 {
849 struct pmu_sys_event_iter_data *idata = data;
850 struct perf_pmu *pmu = idata->pmu;
851
852 if (!pe->name) {
853 if (pe->metric_group || pe->metric_name)
854 return 0;
855 return -EINVAL;
856 }
857
858 if (!pe->compat || !pe->pmu)
859 return 0;
860
861 if (!strcmp(pmu->id, pe->compat) &&
862 pmu_uncore_alias_match(pe->pmu, pmu->name)) {
863 __perf_pmu__new_alias(idata->head, NULL,
864 (char *)pe->name,
865 (char *)pe->desc,
866 (char *)pe->event,
867 (char *)pe->long_desc,
868 (char *)pe->topic,
869 (char *)pe->unit,
870 (char *)pe->perpkg,
871 (char *)pe->metric_expr,
872 (char *)pe->metric_name,
873 (char *)pe->deprecated);
874 }
875
876 return 0;
877 }
878
879 static void pmu_add_sys_aliases(struct list_head *head, struct perf_pmu *pmu)
880 {
881 struct pmu_sys_event_iter_data idata = {
882 .head = head,
883 .pmu = pmu,
884 };
885
886 if (!pmu->id)
887 return;
888
889 pmu_for_each_sys_event(pmu_add_sys_aliases_iter_fn, &idata);
890 }
891
892 struct perf_event_attr * __weak
893 perf_pmu__get_default_config(struct perf_pmu *pmu __maybe_unused)
894 {
895 return NULL;
896 }
897
898 static int pmu_max_precise(const char *name)
899 {
900 char path[PATH_MAX];
901 int max_precise = -1;
902
903 scnprintf(path, PATH_MAX,
904 "bus/event_source/devices/%s/caps/max_precise",
905 name);
906
907 sysfs__read_int(path, &max_precise);
908 return max_precise;
909 }
910
911 static struct perf_pmu *pmu_lookup(const char *name)
912 {
913 struct perf_pmu *pmu;
914 LIST_HEAD(format);
915 LIST_HEAD(aliases);
916 __u32 type;
917
918 /*
919 * The pmu data we store & need consists of the pmu
920 * type value and format definitions. Load both right
921 * now.
922 */
923 if (pmu_format(name, &format))
924 return NULL;
925
926 /*
927 * Check the type first to avoid unnecessary work.
928 */
929 if (pmu_type(name, &type))
930 return NULL;
931
932 if (pmu_aliases(name, &aliases))
933 return NULL;
934
935 pmu = zalloc(sizeof(*pmu));
936 if (!pmu)
937 return NULL;
938
939 pmu->cpus = pmu_cpumask(name);
940 pmu->name = strdup(name);
941 pmu->type = type;
942 pmu->is_uncore = pmu_is_uncore(name);
943 if (pmu->is_uncore)
944 pmu->id = pmu_id(name);
945 pmu->max_precise = pmu_max_precise(name);
946 pmu_add_cpu_aliases(&aliases, pmu);
947 pmu_add_sys_aliases(&aliases, pmu);
948
949 INIT_LIST_HEAD(&pmu->format);
950 INIT_LIST_HEAD(&pmu->aliases);
951 INIT_LIST_HEAD(&pmu->caps);
952 list_splice(&format, &pmu->format);
953 list_splice(&aliases, &pmu->aliases);
954 list_add_tail(&pmu->list, &pmus);
955
956 pmu->default_config = perf_pmu__get_default_config(pmu);
957
958 return pmu;
959 }
960
961 static struct perf_pmu *pmu_find(const char *name)
962 {
963 struct perf_pmu *pmu;
964
965 list_for_each_entry(pmu, &pmus, list)
966 if (!strcmp(pmu->name, name))
967 return pmu;
968
969 return NULL;
970 }
971
972 struct perf_pmu *perf_pmu__find_by_type(unsigned int type)
973 {
974 struct perf_pmu *pmu;
975
976 list_for_each_entry(pmu, &pmus, list)
977 if (pmu->type == type)
978 return pmu;
979
980 return NULL;
981 }
982
983 struct perf_pmu *perf_pmu__scan(struct perf_pmu *pmu)
984 {
985 /*
986 * pmu iterator: If pmu is NULL, we start at the begin,
987 * otherwise return the next pmu. Returns NULL on end.
988 */
989 if (!pmu) {
990 pmu_read_sysfs();
991 pmu = list_prepare_entry(pmu, &pmus, list);
992 }
993 list_for_each_entry_continue(pmu, &pmus, list)
994 return pmu;
995 return NULL;
996 }
997
998 struct perf_pmu *evsel__find_pmu(struct evsel *evsel)
999 {
1000 struct perf_pmu *pmu = NULL;
1001
1002 while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1003 if (pmu->type == evsel->core.attr.type)
1004 break;
1005 }
1006
1007 return pmu;
1008 }
1009
1010 bool evsel__is_aux_event(struct evsel *evsel)
1011 {
1012 struct perf_pmu *pmu = evsel__find_pmu(evsel);
1013
1014 return pmu && pmu->auxtrace;
1015 }
1016
1017 struct perf_pmu *perf_pmu__find(const char *name)
1018 {
1019 struct perf_pmu *pmu;
1020
1021 /*
1022 * Once PMU is loaded it stays in the list,
1023 * so we keep us from multiple reading/parsing
1024 * the pmu format definitions.
1025 */
1026 pmu = pmu_find(name);
1027 if (pmu)
1028 return pmu;
1029
1030 return pmu_lookup(name);
1031 }
1032
1033 static struct perf_pmu_format *
1034 pmu_find_format(struct list_head *formats, const char *name)
1035 {
1036 struct perf_pmu_format *format;
1037
1038 list_for_each_entry(format, formats, list)
1039 if (!strcmp(format->name, name))
1040 return format;
1041
1042 return NULL;
1043 }
1044
1045 __u64 perf_pmu__format_bits(struct list_head *formats, const char *name)
1046 {
1047 struct perf_pmu_format *format = pmu_find_format(formats, name);
1048 __u64 bits = 0;
1049 int fbit;
1050
1051 if (!format)
1052 return 0;
1053
1054 for_each_set_bit(fbit, format->bits, PERF_PMU_FORMAT_BITS)
1055 bits |= 1ULL << fbit;
1056
1057 return bits;
1058 }
1059
1060 int perf_pmu__format_type(struct list_head *formats, const char *name)
1061 {
1062 struct perf_pmu_format *format = pmu_find_format(formats, name);
1063
1064 if (!format)
1065 return -1;
1066
1067 return format->value;
1068 }
1069
1070 /*
1071 * Sets value based on the format definition (format parameter)
1072 * and unformated value (value parameter).
1073 */
1074 static void pmu_format_value(unsigned long *format, __u64 value, __u64 *v,
1075 bool zero)
1076 {
1077 unsigned long fbit, vbit;
1078
1079 for (fbit = 0, vbit = 0; fbit < PERF_PMU_FORMAT_BITS; fbit++) {
1080
1081 if (!test_bit(fbit, format))
1082 continue;
1083
1084 if (value & (1llu << vbit++))
1085 *v |= (1llu << fbit);
1086 else if (zero)
1087 *v &= ~(1llu << fbit);
1088 }
1089 }
1090
1091 static __u64 pmu_format_max_value(const unsigned long *format)
1092 {
1093 int w;
1094
1095 w = bitmap_weight(format, PERF_PMU_FORMAT_BITS);
1096 if (!w)
1097 return 0;
1098 if (w < 64)
1099 return (1ULL << w) - 1;
1100 return -1;
1101 }
1102
1103 /*
1104 * Term is a string term, and might be a param-term. Try to look up it's value
1105 * in the remaining terms.
1106 * - We have a term like "base-or-format-term=param-term",
1107 * - We need to find the value supplied for "param-term" (with param-term named
1108 * in a config string) later on in the term list.
1109 */
1110 static int pmu_resolve_param_term(struct parse_events_term *term,
1111 struct list_head *head_terms,
1112 __u64 *value)
1113 {
1114 struct parse_events_term *t;
1115
1116 list_for_each_entry(t, head_terms, list) {
1117 if (t->type_val == PARSE_EVENTS__TERM_TYPE_NUM &&
1118 t->config && !strcmp(t->config, term->config)) {
1119 t->used = true;
1120 *value = t->val.num;
1121 return 0;
1122 }
1123 }
1124
1125 if (verbose > 0)
1126 printf("Required parameter '%s' not specified\n", term->config);
1127
1128 return -1;
1129 }
1130
1131 static char *pmu_formats_string(struct list_head *formats)
1132 {
1133 struct perf_pmu_format *format;
1134 char *str = NULL;
1135 struct strbuf buf = STRBUF_INIT;
1136 unsigned i = 0;
1137
1138 if (!formats)
1139 return NULL;
1140
1141 /* sysfs exported terms */
1142 list_for_each_entry(format, formats, list)
1143 if (strbuf_addf(&buf, i++ ? ",%s" : "%s", format->name) < 0)
1144 goto error;
1145
1146 str = strbuf_detach(&buf, NULL);
1147 error:
1148 strbuf_release(&buf);
1149
1150 return str;
1151 }
1152
1153 /*
1154 * Setup one of config[12] attr members based on the
1155 * user input data - term parameter.
1156 */
1157 static int pmu_config_term(const char *pmu_name,
1158 struct list_head *formats,
1159 struct perf_event_attr *attr,
1160 struct parse_events_term *term,
1161 struct list_head *head_terms,
1162 bool zero, struct parse_events_error *err)
1163 {
1164 struct perf_pmu_format *format;
1165 __u64 *vp;
1166 __u64 val, max_val;
1167
1168 /*
1169 * If this is a parameter we've already used for parameterized-eval,
1170 * skip it in normal eval.
1171 */
1172 if (term->used)
1173 return 0;
1174
1175 /*
1176 * Hardcoded terms should be already in, so nothing
1177 * to be done for them.
1178 */
1179 if (parse_events__is_hardcoded_term(term))
1180 return 0;
1181
1182 format = pmu_find_format(formats, term->config);
1183 if (!format) {
1184 char *pmu_term = pmu_formats_string(formats);
1185 char *unknown_term;
1186 char *help_msg;
1187
1188 if (asprintf(&unknown_term,
1189 "unknown term '%s' for pmu '%s'",
1190 term->config, pmu_name) < 0)
1191 unknown_term = NULL;
1192 help_msg = parse_events_formats_error_string(pmu_term);
1193 if (err) {
1194 parse_events__handle_error(err, term->err_term,
1195 unknown_term,
1196 help_msg);
1197 } else {
1198 pr_debug("%s (%s)\n", unknown_term, help_msg);
1199 free(unknown_term);
1200 }
1201 free(pmu_term);
1202 return -EINVAL;
1203 }
1204
1205 switch (format->value) {
1206 case PERF_PMU_FORMAT_VALUE_CONFIG:
1207 vp = &attr->config;
1208 break;
1209 case PERF_PMU_FORMAT_VALUE_CONFIG1:
1210 vp = &attr->config1;
1211 break;
1212 case PERF_PMU_FORMAT_VALUE_CONFIG2:
1213 vp = &attr->config2;
1214 break;
1215 default:
1216 return -EINVAL;
1217 }
1218
1219 /*
1220 * Either directly use a numeric term, or try to translate string terms
1221 * using event parameters.
1222 */
1223 if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) {
1224 if (term->no_value &&
1225 bitmap_weight(format->bits, PERF_PMU_FORMAT_BITS) > 1) {
1226 if (err) {
1227 parse_events__handle_error(err, term->err_val,
1228 strdup("no value assigned for term"),
1229 NULL);
1230 }
1231 return -EINVAL;
1232 }
1233
1234 val = term->val.num;
1235 } else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) {
1236 if (strcmp(term->val.str, "?")) {
1237 if (verbose > 0) {
1238 pr_info("Invalid sysfs entry %s=%s\n",
1239 term->config, term->val.str);
1240 }
1241 if (err) {
1242 parse_events__handle_error(err, term->err_val,
1243 strdup("expected numeric value"),
1244 NULL);
1245 }
1246 return -EINVAL;
1247 }
1248
1249 if (pmu_resolve_param_term(term, head_terms, &val))
1250 return -EINVAL;
1251 } else
1252 return -EINVAL;
1253
1254 max_val = pmu_format_max_value(format->bits);
1255 if (val > max_val) {
1256 if (err) {
1257 char *err_str;
1258
1259 parse_events__handle_error(err, term->err_val,
1260 asprintf(&err_str,
1261 "value too big for format, maximum is %llu",
1262 (unsigned long long)max_val) < 0
1263 ? strdup("value too big for format")
1264 : err_str,
1265 NULL);
1266 return -EINVAL;
1267 }
1268 /*
1269 * Assume we don't care if !err, in which case the value will be
1270 * silently truncated.
1271 */
1272 }
1273
1274 pmu_format_value(format->bits, val, vp, zero);
1275 return 0;
1276 }
1277
1278 int perf_pmu__config_terms(const char *pmu_name, struct list_head *formats,
1279 struct perf_event_attr *attr,
1280 struct list_head *head_terms,
1281 bool zero, struct parse_events_error *err)
1282 {
1283 struct parse_events_term *term;
1284
1285 list_for_each_entry(term, head_terms, list) {
1286 if (pmu_config_term(pmu_name, formats, attr, term, head_terms,
1287 zero, err))
1288 return -EINVAL;
1289 }
1290
1291 return 0;
1292 }
1293
1294 /*
1295 * Configures event's 'attr' parameter based on the:
1296 * 1) users input - specified in terms parameter
1297 * 2) pmu format definitions - specified by pmu parameter
1298 */
1299 int perf_pmu__config(struct perf_pmu *pmu, struct perf_event_attr *attr,
1300 struct list_head *head_terms,
1301 struct parse_events_error *err)
1302 {
1303 bool zero = !!pmu->default_config;
1304
1305 attr->type = pmu->type;
1306 return perf_pmu__config_terms(pmu->name, &pmu->format, attr,
1307 head_terms, zero, err);
1308 }
1309
1310 static struct perf_pmu_alias *pmu_find_alias(struct perf_pmu *pmu,
1311 struct parse_events_term *term)
1312 {
1313 struct perf_pmu_alias *alias;
1314 char *name;
1315
1316 if (parse_events__is_hardcoded_term(term))
1317 return NULL;
1318
1319 if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) {
1320 if (term->val.num != 1)
1321 return NULL;
1322 if (pmu_find_format(&pmu->format, term->config))
1323 return NULL;
1324 name = term->config;
1325 } else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) {
1326 if (strcasecmp(term->config, "event"))
1327 return NULL;
1328 name = term->val.str;
1329 } else {
1330 return NULL;
1331 }
1332
1333 list_for_each_entry(alias, &pmu->aliases, list) {
1334 if (!strcasecmp(alias->name, name))
1335 return alias;
1336 }
1337 return NULL;
1338 }
1339
1340
1341 static int check_info_data(struct perf_pmu_alias *alias,
1342 struct perf_pmu_info *info)
1343 {
1344 /*
1345 * Only one term in event definition can
1346 * define unit, scale and snapshot, fail
1347 * if there's more than one.
1348 */
1349 if ((info->unit && alias->unit[0]) ||
1350 (info->scale && alias->scale) ||
1351 (info->snapshot && alias->snapshot))
1352 return -EINVAL;
1353
1354 if (alias->unit[0])
1355 info->unit = alias->unit;
1356
1357 if (alias->scale)
1358 info->scale = alias->scale;
1359
1360 if (alias->snapshot)
1361 info->snapshot = alias->snapshot;
1362
1363 return 0;
1364 }
1365
1366 /*
1367 * Find alias in the terms list and replace it with the terms
1368 * defined for the alias
1369 */
1370 int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms,
1371 struct perf_pmu_info *info)
1372 {
1373 struct parse_events_term *term, *h;
1374 struct perf_pmu_alias *alias;
1375 int ret;
1376
1377 info->per_pkg = false;
1378
1379 /*
1380 * Mark unit and scale as not set
1381 * (different from default values, see below)
1382 */
1383 info->unit = NULL;
1384 info->scale = 0.0;
1385 info->snapshot = false;
1386 info->metric_expr = NULL;
1387 info->metric_name = NULL;
1388
1389 list_for_each_entry_safe(term, h, head_terms, list) {
1390 alias = pmu_find_alias(pmu, term);
1391 if (!alias)
1392 continue;
1393 ret = pmu_alias_terms(alias, &term->list);
1394 if (ret)
1395 return ret;
1396
1397 ret = check_info_data(alias, info);
1398 if (ret)
1399 return ret;
1400
1401 if (alias->per_pkg)
1402 info->per_pkg = true;
1403 info->metric_expr = alias->metric_expr;
1404 info->metric_name = alias->metric_name;
1405
1406 list_del_init(&term->list);
1407 parse_events_term__delete(term);
1408 }
1409
1410 /*
1411 * if no unit or scale foundin aliases, then
1412 * set defaults as for evsel
1413 * unit cannot left to NULL
1414 */
1415 if (info->unit == NULL)
1416 info->unit = "";
1417
1418 if (info->scale == 0.0)
1419 info->scale = 1.0;
1420
1421 return 0;
1422 }
1423
1424 int perf_pmu__new_format(struct list_head *list, char *name,
1425 int config, unsigned long *bits)
1426 {
1427 struct perf_pmu_format *format;
1428
1429 format = zalloc(sizeof(*format));
1430 if (!format)
1431 return -ENOMEM;
1432
1433 format->name = strdup(name);
1434 format->value = config;
1435 memcpy(format->bits, bits, sizeof(format->bits));
1436
1437 list_add_tail(&format->list, list);
1438 return 0;
1439 }
1440
1441 void perf_pmu__set_format(unsigned long *bits, long from, long to)
1442 {
1443 long b;
1444
1445 if (!to)
1446 to = from;
1447
1448 memset(bits, 0, BITS_TO_BYTES(PERF_PMU_FORMAT_BITS));
1449 for (b = from; b <= to; b++)
1450 set_bit(b, bits);
1451 }
1452
1453 void perf_pmu__del_formats(struct list_head *formats)
1454 {
1455 struct perf_pmu_format *fmt, *tmp;
1456
1457 list_for_each_entry_safe(fmt, tmp, formats, list) {
1458 list_del(&fmt->list);
1459 free(fmt->name);
1460 free(fmt);
1461 }
1462 }
1463
1464 static int sub_non_neg(int a, int b)
1465 {
1466 if (b > a)
1467 return 0;
1468 return a - b;
1469 }
1470
1471 static char *format_alias(char *buf, int len, struct perf_pmu *pmu,
1472 struct perf_pmu_alias *alias)
1473 {
1474 struct parse_events_term *term;
1475 int used = snprintf(buf, len, "%s/%s", pmu->name, alias->name);
1476
1477 list_for_each_entry(term, &alias->terms, list) {
1478 if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR)
1479 used += snprintf(buf + used, sub_non_neg(len, used),
1480 ",%s=%s", term->config,
1481 term->val.str);
1482 }
1483
1484 if (sub_non_neg(len, used) > 0) {
1485 buf[used] = '/';
1486 used++;
1487 }
1488 if (sub_non_neg(len, used) > 0) {
1489 buf[used] = '\0';
1490 used++;
1491 } else
1492 buf[len - 1] = '\0';
1493
1494 return buf;
1495 }
1496
1497 static char *format_alias_or(char *buf, int len, struct perf_pmu *pmu,
1498 struct perf_pmu_alias *alias)
1499 {
1500 snprintf(buf, len, "%s OR %s/%s/", alias->name, pmu->name, alias->name);
1501 return buf;
1502 }
1503
1504 struct sevent {
1505 char *name;
1506 char *desc;
1507 char *topic;
1508 char *str;
1509 char *pmu;
1510 char *metric_expr;
1511 char *metric_name;
1512 int is_cpu;
1513 };
1514
1515 static int cmp_sevent(const void *a, const void *b)
1516 {
1517 const struct sevent *as = a;
1518 const struct sevent *bs = b;
1519
1520 /* Put extra events last */
1521 if (!!as->desc != !!bs->desc)
1522 return !!as->desc - !!bs->desc;
1523 if (as->topic && bs->topic) {
1524 int n = strcmp(as->topic, bs->topic);
1525
1526 if (n)
1527 return n;
1528 }
1529
1530 /* Order CPU core events to be first */
1531 if (as->is_cpu != bs->is_cpu)
1532 return bs->is_cpu - as->is_cpu;
1533
1534 return strcmp(as->name, bs->name);
1535 }
1536
1537 static void wordwrap(char *s, int start, int max, int corr)
1538 {
1539 int column = start;
1540 int n;
1541
1542 while (*s) {
1543 int wlen = strcspn(s, " \t");
1544
1545 if (column + wlen >= max && column > start) {
1546 printf("\n%*s", start, "");
1547 column = start + corr;
1548 }
1549 n = printf("%s%.*s", column > start ? " " : "", wlen, s);
1550 if (n <= 0)
1551 break;
1552 s += wlen;
1553 column += n;
1554 s = skip_spaces(s);
1555 }
1556 }
1557
1558 bool is_pmu_core(const char *name)
1559 {
1560 return !strcmp(name, "cpu") || is_arm_pmu_core(name);
1561 }
1562
1563 void print_pmu_events(const char *event_glob, bool name_only, bool quiet_flag,
1564 bool long_desc, bool details_flag, bool deprecated)
1565 {
1566 struct perf_pmu *pmu;
1567 struct perf_pmu_alias *alias;
1568 char buf[1024];
1569 int printed = 0;
1570 int len, j;
1571 struct sevent *aliases;
1572 int numdesc = 0;
1573 int columns = pager_get_columns();
1574 char *topic = NULL;
1575
1576 pmu = NULL;
1577 len = 0;
1578 while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1579 list_for_each_entry(alias, &pmu->aliases, list)
1580 len++;
1581 if (pmu->selectable)
1582 len++;
1583 }
1584 aliases = zalloc(sizeof(struct sevent) * len);
1585 if (!aliases)
1586 goto out_enomem;
1587 pmu = NULL;
1588 j = 0;
1589 while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1590 list_for_each_entry(alias, &pmu->aliases, list) {
1591 char *name = alias->desc ? alias->name :
1592 format_alias(buf, sizeof(buf), pmu, alias);
1593 bool is_cpu = is_pmu_core(pmu->name);
1594
1595 if (alias->deprecated && !deprecated)
1596 continue;
1597
1598 if (event_glob != NULL &&
1599 !(strglobmatch_nocase(name, event_glob) ||
1600 (!is_cpu && strglobmatch_nocase(alias->name,
1601 event_glob)) ||
1602 (alias->topic &&
1603 strglobmatch_nocase(alias->topic, event_glob))))
1604 continue;
1605
1606 if (is_cpu && !name_only && !alias->desc)
1607 name = format_alias_or(buf, sizeof(buf), pmu, alias);
1608
1609 aliases[j].name = name;
1610 if (is_cpu && !name_only && !alias->desc)
1611 aliases[j].name = format_alias_or(buf,
1612 sizeof(buf),
1613 pmu, alias);
1614 aliases[j].name = strdup(aliases[j].name);
1615 if (!aliases[j].name)
1616 goto out_enomem;
1617
1618 aliases[j].desc = long_desc ? alias->long_desc :
1619 alias->desc;
1620 aliases[j].topic = alias->topic;
1621 aliases[j].str = alias->str;
1622 aliases[j].pmu = pmu->name;
1623 aliases[j].metric_expr = alias->metric_expr;
1624 aliases[j].metric_name = alias->metric_name;
1625 aliases[j].is_cpu = is_cpu;
1626 j++;
1627 }
1628 if (pmu->selectable &&
1629 (event_glob == NULL || strglobmatch(pmu->name, event_glob))) {
1630 char *s;
1631 if (asprintf(&s, "%s//", pmu->name) < 0)
1632 goto out_enomem;
1633 aliases[j].name = s;
1634 j++;
1635 }
1636 }
1637 len = j;
1638 qsort(aliases, len, sizeof(struct sevent), cmp_sevent);
1639 for (j = 0; j < len; j++) {
1640 /* Skip duplicates */
1641 if (j > 0 && !strcmp(aliases[j].name, aliases[j - 1].name))
1642 continue;
1643 if (name_only) {
1644 printf("%s ", aliases[j].name);
1645 continue;
1646 }
1647 if (aliases[j].desc && !quiet_flag) {
1648 if (numdesc++ == 0)
1649 printf("\n");
1650 if (aliases[j].topic && (!topic ||
1651 strcmp(topic, aliases[j].topic))) {
1652 printf("%s%s:\n", topic ? "\n" : "",
1653 aliases[j].topic);
1654 topic = aliases[j].topic;
1655 }
1656 printf(" %-50s\n", aliases[j].name);
1657 printf("%*s", 8, "[");
1658 wordwrap(aliases[j].desc, 8, columns, 0);
1659 printf("]\n");
1660 if (details_flag) {
1661 printf("%*s%s/%s/ ", 8, "", aliases[j].pmu, aliases[j].str);
1662 if (aliases[j].metric_name)
1663 printf(" MetricName: %s", aliases[j].metric_name);
1664 if (aliases[j].metric_expr)
1665 printf(" MetricExpr: %s", aliases[j].metric_expr);
1666 putchar('\n');
1667 }
1668 } else
1669 printf(" %-50s [Kernel PMU event]\n", aliases[j].name);
1670 printed++;
1671 }
1672 if (printed && pager_in_use())
1673 printf("\n");
1674 out_free:
1675 for (j = 0; j < len; j++)
1676 zfree(&aliases[j].name);
1677 zfree(&aliases);
1678 return;
1679
1680 out_enomem:
1681 printf("FATAL: not enough memory to print PMU events\n");
1682 if (aliases)
1683 goto out_free;
1684 }
1685
1686 bool pmu_have_event(const char *pname, const char *name)
1687 {
1688 struct perf_pmu *pmu;
1689 struct perf_pmu_alias *alias;
1690
1691 pmu = NULL;
1692 while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1693 if (strcmp(pname, pmu->name))
1694 continue;
1695 list_for_each_entry(alias, &pmu->aliases, list)
1696 if (!strcmp(alias->name, name))
1697 return true;
1698 }
1699 return false;
1700 }
1701
1702 static FILE *perf_pmu__open_file(struct perf_pmu *pmu, const char *name)
1703 {
1704 char path[PATH_MAX];
1705 const char *sysfs;
1706
1707 sysfs = sysfs__mountpoint();
1708 if (!sysfs)
1709 return NULL;
1710
1711 snprintf(path, PATH_MAX,
1712 "%s" EVENT_SOURCE_DEVICE_PATH "%s/%s", sysfs, pmu->name, name);
1713 if (!file_available(path))
1714 return NULL;
1715 return fopen(path, "r");
1716 }
1717
1718 int perf_pmu__scan_file(struct perf_pmu *pmu, const char *name, const char *fmt,
1719 ...)
1720 {
1721 va_list args;
1722 FILE *file;
1723 int ret = EOF;
1724
1725 va_start(args, fmt);
1726 file = perf_pmu__open_file(pmu, name);
1727 if (file) {
1728 ret = vfscanf(file, fmt, args);
1729 fclose(file);
1730 }
1731 va_end(args);
1732 return ret;
1733 }
1734
1735 static int perf_pmu__new_caps(struct list_head *list, char *name, char *value)
1736 {
1737 struct perf_pmu_caps *caps = zalloc(sizeof(*caps));
1738
1739 if (!caps)
1740 return -ENOMEM;
1741
1742 caps->name = strdup(name);
1743 if (!caps->name)
1744 goto free_caps;
1745 caps->value = strndup(value, strlen(value) - 1);
1746 if (!caps->value)
1747 goto free_name;
1748 list_add_tail(&caps->list, list);
1749 return 0;
1750
1751 free_name:
1752 zfree(caps->name);
1753 free_caps:
1754 free(caps);
1755
1756 return -ENOMEM;
1757 }
1758
1759 /*
1760 * Reading/parsing the given pmu capabilities, which should be located at:
1761 * /sys/bus/event_source/devices/<dev>/caps as sysfs group attributes.
1762 * Return the number of capabilities
1763 */
1764 int perf_pmu__caps_parse(struct perf_pmu *pmu)
1765 {
1766 struct stat st;
1767 char caps_path[PATH_MAX];
1768 const char *sysfs = sysfs__mountpoint();
1769 DIR *caps_dir;
1770 struct dirent *evt_ent;
1771 int nr_caps = 0;
1772
1773 if (!sysfs)
1774 return -1;
1775
1776 snprintf(caps_path, PATH_MAX,
1777 "%s" EVENT_SOURCE_DEVICE_PATH "%s/caps", sysfs, pmu->name);
1778
1779 if (stat(caps_path, &st) < 0)
1780 return 0; /* no error if caps does not exist */
1781
1782 caps_dir = opendir(caps_path);
1783 if (!caps_dir)
1784 return -EINVAL;
1785
1786 while ((evt_ent = readdir(caps_dir)) != NULL) {
1787 char path[PATH_MAX + NAME_MAX + 1];
1788 char *name = evt_ent->d_name;
1789 char value[128];
1790 FILE *file;
1791
1792 if (!strcmp(name, ".") || !strcmp(name, ".."))
1793 continue;
1794
1795 snprintf(path, sizeof(path), "%s/%s", caps_path, name);
1796
1797 file = fopen(path, "r");
1798 if (!file)
1799 continue;
1800
1801 if (!fgets(value, sizeof(value), file) ||
1802 (perf_pmu__new_caps(&pmu->caps, name, value) < 0)) {
1803 fclose(file);
1804 continue;
1805 }
1806
1807 nr_caps++;
1808 fclose(file);
1809 }
1810
1811 closedir(caps_dir);
1812
1813 return nr_caps;
1814 }
Linux with added FPC-III support