Merge branch 'for-5.15-verbose-console' into for-linus
[linux-2.6-microblaze.git] / tools / perf / util / pmu.c
1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/list.h>
3 #include <linux/compiler.h>
4 #include <linux/string.h>
5 #include <linux/zalloc.h>
6 #include <linux/ctype.h>
7 #include <subcmd/pager.h>
8 #include <sys/types.h>
9 #include <errno.h>
10 #include <fcntl.h>
11 #include <sys/stat.h>
12 #include <unistd.h>
13 #include <stdio.h>
14 #include <stdbool.h>
15 #include <stdarg.h>
16 #include <dirent.h>
17 #include <api/fs/fs.h>
18 #include <locale.h>
19 #include <regex.h>
20 #include <perf/cpumap.h>
21 #include <fnmatch.h>
22 #include "debug.h"
23 #include "evsel.h"
24 #include "pmu.h"
25 #include "parse-events.h"
26 #include "header.h"
27 #include "string2.h"
28 #include "strbuf.h"
29 #include "fncache.h"
30 #include "pmu-hybrid.h"
31
32 struct perf_pmu perf_pmu__fake;
33
34 struct perf_pmu_format {
35         char *name;
36         int value;
37         DECLARE_BITMAP(bits, PERF_PMU_FORMAT_BITS);
38         struct list_head list;
39 };
40
41 int perf_pmu_parse(struct list_head *list, char *name);
42 extern FILE *perf_pmu_in;
43
44 static LIST_HEAD(pmus);
45 static bool hybrid_scanned;
46
47 /*
48  * Parse & process all the sysfs attributes located under
49  * the directory specified in 'dir' parameter.
50  */
51 int perf_pmu__format_parse(char *dir, struct list_head *head)
52 {
53         struct dirent *evt_ent;
54         DIR *format_dir;
55         int ret = 0;
56
57         format_dir = opendir(dir);
58         if (!format_dir)
59                 return -EINVAL;
60
61         while (!ret && (evt_ent = readdir(format_dir))) {
62                 char path[PATH_MAX];
63                 char *name = evt_ent->d_name;
64                 FILE *file;
65
66                 if (!strcmp(name, ".") || !strcmp(name, ".."))
67                         continue;
68
69                 snprintf(path, PATH_MAX, "%s/%s", dir, name);
70
71                 ret = -EINVAL;
72                 file = fopen(path, "r");
73                 if (!file)
74                         break;
75
76                 perf_pmu_in = file;
77                 ret = perf_pmu_parse(head, name);
78                 fclose(file);
79         }
80
81         closedir(format_dir);
82         return ret;
83 }
84
85 /*
86  * Reading/parsing the default pmu format definition, which should be
87  * located at:
88  * /sys/bus/event_source/devices/<dev>/format as sysfs group attributes.
89  */
90 static int pmu_format(const char *name, struct list_head *format)
91 {
92         char path[PATH_MAX];
93         const char *sysfs = sysfs__mountpoint();
94
95         if (!sysfs)
96                 return -1;
97
98         snprintf(path, PATH_MAX,
99                  "%s" EVENT_SOURCE_DEVICE_PATH "%s/format", sysfs, name);
100
101         if (!file_available(path))
102                 return 0;
103
104         if (perf_pmu__format_parse(path, format))
105                 return -1;
106
107         return 0;
108 }
109
110 int perf_pmu__convert_scale(const char *scale, char **end, double *sval)
111 {
112         char *lc;
113         int ret = 0;
114
115         /*
116          * save current locale
117          */
118         lc = setlocale(LC_NUMERIC, NULL);
119
120         /*
121          * The lc string may be allocated in static storage,
122          * so get a dynamic copy to make it survive setlocale
123          * call below.
124          */
125         lc = strdup(lc);
126         if (!lc) {
127                 ret = -ENOMEM;
128                 goto out;
129         }
130
131         /*
132          * force to C locale to ensure kernel
133          * scale string is converted correctly.
134          * kernel uses default C locale.
135          */
136         setlocale(LC_NUMERIC, "C");
137
138         *sval = strtod(scale, end);
139
140 out:
141         /* restore locale */
142         setlocale(LC_NUMERIC, lc);
143         free(lc);
144         return ret;
145 }
146
147 static int perf_pmu__parse_scale(struct perf_pmu_alias *alias, char *dir, char *name)
148 {
149         struct stat st;
150         ssize_t sret;
151         char scale[128];
152         int fd, ret = -1;
153         char path[PATH_MAX];
154
155         scnprintf(path, PATH_MAX, "%s/%s.scale", dir, name);
156
157         fd = open(path, O_RDONLY);
158         if (fd == -1)
159                 return -1;
160
161         if (fstat(fd, &st) < 0)
162                 goto error;
163
164         sret = read(fd, scale, sizeof(scale)-1);
165         if (sret < 0)
166                 goto error;
167
168         if (scale[sret - 1] == '\n')
169                 scale[sret - 1] = '\0';
170         else
171                 scale[sret] = '\0';
172
173         ret = perf_pmu__convert_scale(scale, NULL, &alias->scale);
174 error:
175         close(fd);
176         return ret;
177 }
178
179 static int perf_pmu__parse_unit(struct perf_pmu_alias *alias, char *dir, char *name)
180 {
181         char path[PATH_MAX];
182         ssize_t sret;
183         int fd;
184
185         scnprintf(path, PATH_MAX, "%s/%s.unit", dir, name);
186
187         fd = open(path, O_RDONLY);
188         if (fd == -1)
189                 return -1;
190
191         sret = read(fd, alias->unit, UNIT_MAX_LEN);
192         if (sret < 0)
193                 goto error;
194
195         close(fd);
196
197         if (alias->unit[sret - 1] == '\n')
198                 alias->unit[sret - 1] = '\0';
199         else
200                 alias->unit[sret] = '\0';
201
202         return 0;
203 error:
204         close(fd);
205         alias->unit[0] = '\0';
206         return -1;
207 }
208
209 static int
210 perf_pmu__parse_per_pkg(struct perf_pmu_alias *alias, char *dir, char *name)
211 {
212         char path[PATH_MAX];
213         int fd;
214
215         scnprintf(path, PATH_MAX, "%s/%s.per-pkg", dir, name);
216
217         fd = open(path, O_RDONLY);
218         if (fd == -1)
219                 return -1;
220
221         close(fd);
222
223         alias->per_pkg = true;
224         return 0;
225 }
226
227 static int perf_pmu__parse_snapshot(struct perf_pmu_alias *alias,
228                                     char *dir, char *name)
229 {
230         char path[PATH_MAX];
231         int fd;
232
233         scnprintf(path, PATH_MAX, "%s/%s.snapshot", dir, name);
234
235         fd = open(path, O_RDONLY);
236         if (fd == -1)
237                 return -1;
238
239         alias->snapshot = true;
240         close(fd);
241         return 0;
242 }
243
244 static void perf_pmu_assign_str(char *name, const char *field, char **old_str,
245                                 char **new_str)
246 {
247         if (!*old_str)
248                 goto set_new;
249
250         if (*new_str) { /* Have new string, check with old */
251                 if (strcasecmp(*old_str, *new_str))
252                         pr_debug("alias %s differs in field '%s'\n",
253                                  name, field);
254                 zfree(old_str);
255         } else          /* Nothing new --> keep old string */
256                 return;
257 set_new:
258         *old_str = *new_str;
259         *new_str = NULL;
260 }
261
262 static void perf_pmu_update_alias(struct perf_pmu_alias *old,
263                                   struct perf_pmu_alias *newalias)
264 {
265         perf_pmu_assign_str(old->name, "desc", &old->desc, &newalias->desc);
266         perf_pmu_assign_str(old->name, "long_desc", &old->long_desc,
267                             &newalias->long_desc);
268         perf_pmu_assign_str(old->name, "topic", &old->topic, &newalias->topic);
269         perf_pmu_assign_str(old->name, "metric_expr", &old->metric_expr,
270                             &newalias->metric_expr);
271         perf_pmu_assign_str(old->name, "metric_name", &old->metric_name,
272                             &newalias->metric_name);
273         perf_pmu_assign_str(old->name, "value", &old->str, &newalias->str);
274         old->scale = newalias->scale;
275         old->per_pkg = newalias->per_pkg;
276         old->snapshot = newalias->snapshot;
277         memcpy(old->unit, newalias->unit, sizeof(old->unit));
278 }
279
280 /* Delete an alias entry. */
281 void perf_pmu_free_alias(struct perf_pmu_alias *newalias)
282 {
283         zfree(&newalias->name);
284         zfree(&newalias->desc);
285         zfree(&newalias->long_desc);
286         zfree(&newalias->topic);
287         zfree(&newalias->str);
288         zfree(&newalias->metric_expr);
289         zfree(&newalias->metric_name);
290         zfree(&newalias->pmu_name);
291         parse_events_terms__purge(&newalias->terms);
292         free(newalias);
293 }
294
295 /* Merge an alias, search in alias list. If this name is already
296  * present merge both of them to combine all information.
297  */
298 static bool perf_pmu_merge_alias(struct perf_pmu_alias *newalias,
299                                  struct list_head *alist)
300 {
301         struct perf_pmu_alias *a;
302
303         list_for_each_entry(a, alist, list) {
304                 if (!strcasecmp(newalias->name, a->name)) {
305                         if (newalias->pmu_name && a->pmu_name &&
306                             !strcasecmp(newalias->pmu_name, a->pmu_name)) {
307                                 continue;
308                         }
309                         perf_pmu_update_alias(a, newalias);
310                         perf_pmu_free_alias(newalias);
311                         return true;
312                 }
313         }
314         return false;
315 }
316
317 static int __perf_pmu__new_alias(struct list_head *list, char *dir, char *name,
318                                  char *desc, char *val, struct pmu_event *pe)
319 {
320         struct parse_events_term *term;
321         struct perf_pmu_alias *alias;
322         int ret;
323         int num;
324         char newval[256];
325         char *long_desc = NULL, *topic = NULL, *unit = NULL, *perpkg = NULL,
326              *metric_expr = NULL, *metric_name = NULL, *deprecated = NULL,
327              *pmu_name = NULL;
328
329         if (pe) {
330                 long_desc = (char *)pe->long_desc;
331                 topic = (char *)pe->topic;
332                 unit = (char *)pe->unit;
333                 perpkg = (char *)pe->perpkg;
334                 metric_expr = (char *)pe->metric_expr;
335                 metric_name = (char *)pe->metric_name;
336                 deprecated = (char *)pe->deprecated;
337                 pmu_name = (char *)pe->pmu;
338         }
339
340         alias = malloc(sizeof(*alias));
341         if (!alias)
342                 return -ENOMEM;
343
344         INIT_LIST_HEAD(&alias->terms);
345         alias->scale = 1.0;
346         alias->unit[0] = '\0';
347         alias->per_pkg = false;
348         alias->snapshot = false;
349         alias->deprecated = false;
350
351         ret = parse_events_terms(&alias->terms, val);
352         if (ret) {
353                 pr_err("Cannot parse alias %s: %d\n", val, ret);
354                 free(alias);
355                 return ret;
356         }
357
358         /* Scan event and remove leading zeroes, spaces, newlines, some
359          * platforms have terms specified as
360          * event=0x0091 (read from files ../<PMU>/events/<FILE>
361          * and terms specified as event=0x91 (read from JSON files).
362          *
363          * Rebuild string to make alias->str member comparable.
364          */
365         memset(newval, 0, sizeof(newval));
366         ret = 0;
367         list_for_each_entry(term, &alias->terms, list) {
368                 if (ret)
369                         ret += scnprintf(newval + ret, sizeof(newval) - ret,
370                                          ",");
371                 if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM)
372                         ret += scnprintf(newval + ret, sizeof(newval) - ret,
373                                          "%s=%#x", term->config, term->val.num);
374                 else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR)
375                         ret += scnprintf(newval + ret, sizeof(newval) - ret,
376                                          "%s=%s", term->config, term->val.str);
377         }
378
379         alias->name = strdup(name);
380         if (dir) {
381                 /*
382                  * load unit name and scale if available
383                  */
384                 perf_pmu__parse_unit(alias, dir, name);
385                 perf_pmu__parse_scale(alias, dir, name);
386                 perf_pmu__parse_per_pkg(alias, dir, name);
387                 perf_pmu__parse_snapshot(alias, dir, name);
388         }
389
390         alias->metric_expr = metric_expr ? strdup(metric_expr) : NULL;
391         alias->metric_name = metric_name ? strdup(metric_name): NULL;
392         alias->desc = desc ? strdup(desc) : NULL;
393         alias->long_desc = long_desc ? strdup(long_desc) :
394                                 desc ? strdup(desc) : NULL;
395         alias->topic = topic ? strdup(topic) : NULL;
396         if (unit) {
397                 if (perf_pmu__convert_scale(unit, &unit, &alias->scale) < 0)
398                         return -1;
399                 snprintf(alias->unit, sizeof(alias->unit), "%s", unit);
400         }
401         alias->per_pkg = perpkg && sscanf(perpkg, "%d", &num) == 1 && num == 1;
402         alias->str = strdup(newval);
403         alias->pmu_name = pmu_name ? strdup(pmu_name) : NULL;
404
405         if (deprecated)
406                 alias->deprecated = true;
407
408         if (!perf_pmu_merge_alias(alias, list))
409                 list_add_tail(&alias->list, list);
410
411         return 0;
412 }
413
414 static int perf_pmu__new_alias(struct list_head *list, char *dir, char *name, FILE *file)
415 {
416         char buf[256];
417         int ret;
418
419         ret = fread(buf, 1, sizeof(buf), file);
420         if (ret == 0)
421                 return -EINVAL;
422
423         buf[ret] = 0;
424
425         /* Remove trailing newline from sysfs file */
426         strim(buf);
427
428         return __perf_pmu__new_alias(list, dir, name, NULL, buf, NULL);
429 }
430
431 static inline bool pmu_alias_info_file(char *name)
432 {
433         size_t len;
434
435         len = strlen(name);
436         if (len > 5 && !strcmp(name + len - 5, ".unit"))
437                 return true;
438         if (len > 6 && !strcmp(name + len - 6, ".scale"))
439                 return true;
440         if (len > 8 && !strcmp(name + len - 8, ".per-pkg"))
441                 return true;
442         if (len > 9 && !strcmp(name + len - 9, ".snapshot"))
443                 return true;
444
445         return false;
446 }
447
448 /*
449  * Process all the sysfs attributes located under the directory
450  * specified in 'dir' parameter.
451  */
452 static int pmu_aliases_parse(char *dir, struct list_head *head)
453 {
454         struct dirent *evt_ent;
455         DIR *event_dir;
456
457         event_dir = opendir(dir);
458         if (!event_dir)
459                 return -EINVAL;
460
461         while ((evt_ent = readdir(event_dir))) {
462                 char path[PATH_MAX];
463                 char *name = evt_ent->d_name;
464                 FILE *file;
465
466                 if (!strcmp(name, ".") || !strcmp(name, ".."))
467                         continue;
468
469                 /*
470                  * skip info files parsed in perf_pmu__new_alias()
471                  */
472                 if (pmu_alias_info_file(name))
473                         continue;
474
475                 scnprintf(path, PATH_MAX, "%s/%s", dir, name);
476
477                 file = fopen(path, "r");
478                 if (!file) {
479                         pr_debug("Cannot open %s\n", path);
480                         continue;
481                 }
482
483                 if (perf_pmu__new_alias(head, dir, name, file) < 0)
484                         pr_debug("Cannot set up %s\n", name);
485                 fclose(file);
486         }
487
488         closedir(event_dir);
489         return 0;
490 }
491
492 /*
493  * Reading the pmu event aliases definition, which should be located at:
494  * /sys/bus/event_source/devices/<dev>/events as sysfs group attributes.
495  */
496 static int pmu_aliases(const char *name, struct list_head *head)
497 {
498         char path[PATH_MAX];
499         const char *sysfs = sysfs__mountpoint();
500
501         if (!sysfs)
502                 return -1;
503
504         snprintf(path, PATH_MAX,
505                  "%s/bus/event_source/devices/%s/events", sysfs, name);
506
507         if (!file_available(path))
508                 return 0;
509
510         if (pmu_aliases_parse(path, head))
511                 return -1;
512
513         return 0;
514 }
515
516 static int pmu_alias_terms(struct perf_pmu_alias *alias,
517                            struct list_head *terms)
518 {
519         struct parse_events_term *term, *cloned;
520         LIST_HEAD(list);
521         int ret;
522
523         list_for_each_entry(term, &alias->terms, list) {
524                 ret = parse_events_term__clone(&cloned, term);
525                 if (ret) {
526                         parse_events_terms__purge(&list);
527                         return ret;
528                 }
529                 /*
530                  * Weak terms don't override command line options,
531                  * which we don't want for implicit terms in aliases.
532                  */
533                 cloned->weak = true;
534                 list_add_tail(&cloned->list, &list);
535         }
536         list_splice(&list, terms);
537         return 0;
538 }
539
540 /*
541  * Reading/parsing the default pmu type value, which should be
542  * located at:
543  * /sys/bus/event_source/devices/<dev>/type as sysfs attribute.
544  */
545 static int pmu_type(const char *name, __u32 *type)
546 {
547         char path[PATH_MAX];
548         FILE *file;
549         int ret = 0;
550         const char *sysfs = sysfs__mountpoint();
551
552         if (!sysfs)
553                 return -1;
554
555         snprintf(path, PATH_MAX,
556                  "%s" EVENT_SOURCE_DEVICE_PATH "%s/type", sysfs, name);
557
558         if (access(path, R_OK) < 0)
559                 return -1;
560
561         file = fopen(path, "r");
562         if (!file)
563                 return -EINVAL;
564
565         if (1 != fscanf(file, "%u", type))
566                 ret = -1;
567
568         fclose(file);
569         return ret;
570 }
571
572 /* Add all pmus in sysfs to pmu list: */
573 static void pmu_read_sysfs(void)
574 {
575         char path[PATH_MAX];
576         DIR *dir;
577         struct dirent *dent;
578         const char *sysfs = sysfs__mountpoint();
579
580         if (!sysfs)
581                 return;
582
583         snprintf(path, PATH_MAX,
584                  "%s" EVENT_SOURCE_DEVICE_PATH, sysfs);
585
586         dir = opendir(path);
587         if (!dir)
588                 return;
589
590         while ((dent = readdir(dir))) {
591                 if (!strcmp(dent->d_name, ".") || !strcmp(dent->d_name, ".."))
592                         continue;
593                 /* add to static LIST_HEAD(pmus): */
594                 perf_pmu__find(dent->d_name);
595         }
596
597         closedir(dir);
598 }
599
600 static struct perf_cpu_map *__pmu_cpumask(const char *path)
601 {
602         FILE *file;
603         struct perf_cpu_map *cpus;
604
605         file = fopen(path, "r");
606         if (!file)
607                 return NULL;
608
609         cpus = perf_cpu_map__read(file);
610         fclose(file);
611         return cpus;
612 }
613
614 /*
615  * Uncore PMUs have a "cpumask" file under sysfs. CPU PMUs (e.g. on arm/arm64)
616  * may have a "cpus" file.
617  */
618 #define SYS_TEMPLATE_ID "./bus/event_source/devices/%s/identifier"
619 #define CPUS_TEMPLATE_UNCORE    "%s/bus/event_source/devices/%s/cpumask"
620
621 static struct perf_cpu_map *pmu_cpumask(const char *name)
622 {
623         char path[PATH_MAX];
624         struct perf_cpu_map *cpus;
625         const char *sysfs = sysfs__mountpoint();
626         const char *templates[] = {
627                 CPUS_TEMPLATE_UNCORE,
628                 CPUS_TEMPLATE_CPU,
629                 NULL
630         };
631         const char **template;
632
633         if (!sysfs)
634                 return NULL;
635
636         for (template = templates; *template; template++) {
637                 snprintf(path, PATH_MAX, *template, sysfs, name);
638                 cpus = __pmu_cpumask(path);
639                 if (cpus)
640                         return cpus;
641         }
642
643         return NULL;
644 }
645
646 static bool pmu_is_uncore(const char *name)
647 {
648         char path[PATH_MAX];
649         const char *sysfs;
650
651         if (perf_pmu__hybrid_mounted(name))
652                 return false;
653
654         sysfs = sysfs__mountpoint();
655         snprintf(path, PATH_MAX, CPUS_TEMPLATE_UNCORE, sysfs, name);
656         return file_available(path);
657 }
658
659 static char *pmu_id(const char *name)
660 {
661         char path[PATH_MAX], *str;
662         size_t len;
663
664         snprintf(path, PATH_MAX, SYS_TEMPLATE_ID, name);
665
666         if (sysfs__read_str(path, &str, &len) < 0)
667                 return NULL;
668
669         str[len - 1] = 0; /* remove line feed */
670
671         return str;
672 }
673
674 /*
675  *  PMU CORE devices have different name other than cpu in sysfs on some
676  *  platforms.
677  *  Looking for possible sysfs files to identify the arm core device.
678  */
679 static int is_arm_pmu_core(const char *name)
680 {
681         char path[PATH_MAX];
682         const char *sysfs = sysfs__mountpoint();
683
684         if (!sysfs)
685                 return 0;
686
687         /* Look for cpu sysfs (specific to arm) */
688         scnprintf(path, PATH_MAX, "%s/bus/event_source/devices/%s/cpus",
689                                 sysfs, name);
690         return file_available(path);
691 }
692
693 static char *perf_pmu__getcpuid(struct perf_pmu *pmu)
694 {
695         char *cpuid;
696         static bool printed;
697
698         cpuid = getenv("PERF_CPUID");
699         if (cpuid)
700                 cpuid = strdup(cpuid);
701         if (!cpuid)
702                 cpuid = get_cpuid_str(pmu);
703         if (!cpuid)
704                 return NULL;
705
706         if (!printed) {
707                 pr_debug("Using CPUID %s\n", cpuid);
708                 printed = true;
709         }
710         return cpuid;
711 }
712
713 struct pmu_events_map *perf_pmu__find_map(struct perf_pmu *pmu)
714 {
715         struct pmu_events_map *map;
716         char *cpuid = perf_pmu__getcpuid(pmu);
717         int i;
718
719         /* on some platforms which uses cpus map, cpuid can be NULL for
720          * PMUs other than CORE PMUs.
721          */
722         if (!cpuid)
723                 return NULL;
724
725         i = 0;
726         for (;;) {
727                 map = &pmu_events_map[i++];
728                 if (!map->table) {
729                         map = NULL;
730                         break;
731                 }
732
733                 if (!strcmp_cpuid_str(map->cpuid, cpuid))
734                         break;
735         }
736         free(cpuid);
737         return map;
738 }
739
740 struct pmu_events_map *__weak pmu_events_map__find(void)
741 {
742         return perf_pmu__find_map(NULL);
743 }
744
745 static bool perf_pmu__valid_suffix(char *pmu_name, char *tok)
746 {
747         char *p;
748
749         if (strncmp(pmu_name, tok, strlen(tok)))
750                 return false;
751
752         p = pmu_name + strlen(tok);
753         if (*p == 0)
754                 return true;
755
756         if (*p != '_')
757                 return false;
758
759         ++p;
760         if (*p == 0 || !isdigit(*p))
761                 return false;
762
763         return true;
764 }
765
766 bool pmu_uncore_alias_match(const char *pmu_name, const char *name)
767 {
768         char *tmp = NULL, *tok, *str;
769         bool res;
770
771         str = strdup(pmu_name);
772         if (!str)
773                 return false;
774
775         /*
776          * uncore alias may be from different PMU with common prefix
777          */
778         tok = strtok_r(str, ",", &tmp);
779         if (strncmp(pmu_name, tok, strlen(tok))) {
780                 res = false;
781                 goto out;
782         }
783
784         /*
785          * Match more complex aliases where the alias name is a comma-delimited
786          * list of tokens, orderly contained in the matching PMU name.
787          *
788          * Example: For alias "socket,pmuname" and PMU "socketX_pmunameY", we
789          *          match "socket" in "socketX_pmunameY" and then "pmuname" in
790          *          "pmunameY".
791          */
792         for (; tok; name += strlen(tok), tok = strtok_r(NULL, ",", &tmp)) {
793                 name = strstr(name, tok);
794                 if (!name || !perf_pmu__valid_suffix((char *)name, tok)) {
795                         res = false;
796                         goto out;
797                 }
798         }
799
800         res = true;
801 out:
802         free(str);
803         return res;
804 }
805
806 /*
807  * From the pmu_events_map, find the table of PMU events that corresponds
808  * to the current running CPU. Then, add all PMU events from that table
809  * as aliases.
810  */
811 void pmu_add_cpu_aliases_map(struct list_head *head, struct perf_pmu *pmu,
812                              struct pmu_events_map *map)
813 {
814         int i;
815         const char *name = pmu->name;
816         /*
817          * Found a matching PMU events table. Create aliases
818          */
819         i = 0;
820         while (1) {
821                 const char *cpu_name = is_arm_pmu_core(name) ? name : "cpu";
822                 struct pmu_event *pe = &map->table[i++];
823                 const char *pname = pe->pmu ? pe->pmu : cpu_name;
824
825                 if (!pe->name) {
826                         if (pe->metric_group || pe->metric_name)
827                                 continue;
828                         break;
829                 }
830
831                 if (pmu_is_uncore(name) &&
832                     pmu_uncore_alias_match(pname, name))
833                         goto new_alias;
834
835                 if (strcmp(pname, name))
836                         continue;
837
838 new_alias:
839                 /* need type casts to override 'const' */
840                 __perf_pmu__new_alias(head, NULL, (char *)pe->name,
841                                 (char *)pe->desc, (char *)pe->event,
842                                 pe);
843         }
844 }
845
846 static void pmu_add_cpu_aliases(struct list_head *head, struct perf_pmu *pmu)
847 {
848         struct pmu_events_map *map;
849
850         map = perf_pmu__find_map(pmu);
851         if (!map)
852                 return;
853
854         pmu_add_cpu_aliases_map(head, pmu, map);
855 }
856
857 void pmu_for_each_sys_event(pmu_sys_event_iter_fn fn, void *data)
858 {
859         int i = 0;
860
861         while (1) {
862                 struct pmu_sys_events *event_table;
863                 int j = 0;
864
865                 event_table = &pmu_sys_event_tables[i++];
866
867                 if (!event_table->table)
868                         break;
869
870                 while (1) {
871                         struct pmu_event *pe = &event_table->table[j++];
872                         int ret;
873
874                         if (!pe->name && !pe->metric_group && !pe->metric_name)
875                                 break;
876
877                         ret = fn(pe, data);
878                         if (ret)
879                                 break;
880                 }
881         }
882 }
883
884 struct pmu_sys_event_iter_data {
885         struct list_head *head;
886         struct perf_pmu *pmu;
887 };
888
889 static int pmu_add_sys_aliases_iter_fn(struct pmu_event *pe, void *data)
890 {
891         struct pmu_sys_event_iter_data *idata = data;
892         struct perf_pmu *pmu = idata->pmu;
893
894         if (!pe->name) {
895                 if (pe->metric_group || pe->metric_name)
896                         return 0;
897                 return -EINVAL;
898         }
899
900         if (!pe->compat || !pe->pmu)
901                 return 0;
902
903         if (!strcmp(pmu->id, pe->compat) &&
904             pmu_uncore_alias_match(pe->pmu, pmu->name)) {
905                 __perf_pmu__new_alias(idata->head, NULL,
906                                       (char *)pe->name,
907                                       (char *)pe->desc,
908                                       (char *)pe->event,
909                                       pe);
910         }
911
912         return 0;
913 }
914
915 static void pmu_add_sys_aliases(struct list_head *head, struct perf_pmu *pmu)
916 {
917         struct pmu_sys_event_iter_data idata = {
918                 .head = head,
919                 .pmu = pmu,
920         };
921
922         if (!pmu->id)
923                 return;
924
925         pmu_for_each_sys_event(pmu_add_sys_aliases_iter_fn, &idata);
926 }
927
928 struct perf_event_attr * __weak
929 perf_pmu__get_default_config(struct perf_pmu *pmu __maybe_unused)
930 {
931         return NULL;
932 }
933
934 static int pmu_max_precise(const char *name)
935 {
936         char path[PATH_MAX];
937         int max_precise = -1;
938
939         scnprintf(path, PATH_MAX,
940                  "bus/event_source/devices/%s/caps/max_precise",
941                  name);
942
943         sysfs__read_int(path, &max_precise);
944         return max_precise;
945 }
946
947 static struct perf_pmu *pmu_lookup(const char *name)
948 {
949         struct perf_pmu *pmu;
950         LIST_HEAD(format);
951         LIST_HEAD(aliases);
952         __u32 type;
953
954         /*
955          * The pmu data we store & need consists of the pmu
956          * type value and format definitions. Load both right
957          * now.
958          */
959         if (pmu_format(name, &format))
960                 return NULL;
961
962         /*
963          * Check the type first to avoid unnecessary work.
964          */
965         if (pmu_type(name, &type))
966                 return NULL;
967
968         if (pmu_aliases(name, &aliases))
969                 return NULL;
970
971         pmu = zalloc(sizeof(*pmu));
972         if (!pmu)
973                 return NULL;
974
975         pmu->cpus = pmu_cpumask(name);
976         pmu->name = strdup(name);
977         pmu->type = type;
978         pmu->is_uncore = pmu_is_uncore(name);
979         if (pmu->is_uncore)
980                 pmu->id = pmu_id(name);
981         pmu->is_hybrid = perf_pmu__hybrid_mounted(name);
982         pmu->max_precise = pmu_max_precise(name);
983         pmu_add_cpu_aliases(&aliases, pmu);
984         pmu_add_sys_aliases(&aliases, pmu);
985
986         INIT_LIST_HEAD(&pmu->format);
987         INIT_LIST_HEAD(&pmu->aliases);
988         INIT_LIST_HEAD(&pmu->caps);
989         list_splice(&format, &pmu->format);
990         list_splice(&aliases, &pmu->aliases);
991         list_add_tail(&pmu->list, &pmus);
992
993         if (pmu->is_hybrid)
994                 list_add_tail(&pmu->hybrid_list, &perf_pmu__hybrid_pmus);
995
996         pmu->default_config = perf_pmu__get_default_config(pmu);
997
998         return pmu;
999 }
1000
1001 static struct perf_pmu *pmu_find(const char *name)
1002 {
1003         struct perf_pmu *pmu;
1004
1005         list_for_each_entry(pmu, &pmus, list)
1006                 if (!strcmp(pmu->name, name))
1007                         return pmu;
1008
1009         return NULL;
1010 }
1011
1012 struct perf_pmu *perf_pmu__find_by_type(unsigned int type)
1013 {
1014         struct perf_pmu *pmu;
1015
1016         list_for_each_entry(pmu, &pmus, list)
1017                 if (pmu->type == type)
1018                         return pmu;
1019
1020         return NULL;
1021 }
1022
1023 struct perf_pmu *perf_pmu__scan(struct perf_pmu *pmu)
1024 {
1025         /*
1026          * pmu iterator: If pmu is NULL, we start at the begin,
1027          * otherwise return the next pmu. Returns NULL on end.
1028          */
1029         if (!pmu) {
1030                 pmu_read_sysfs();
1031                 pmu = list_prepare_entry(pmu, &pmus, list);
1032         }
1033         list_for_each_entry_continue(pmu, &pmus, list)
1034                 return pmu;
1035         return NULL;
1036 }
1037
1038 struct perf_pmu *evsel__find_pmu(struct evsel *evsel)
1039 {
1040         struct perf_pmu *pmu = NULL;
1041
1042         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1043                 if (pmu->type == evsel->core.attr.type)
1044                         break;
1045         }
1046
1047         return pmu;
1048 }
1049
1050 bool evsel__is_aux_event(struct evsel *evsel)
1051 {
1052         struct perf_pmu *pmu = evsel__find_pmu(evsel);
1053
1054         return pmu && pmu->auxtrace;
1055 }
1056
1057 struct perf_pmu *perf_pmu__find(const char *name)
1058 {
1059         struct perf_pmu *pmu;
1060
1061         /*
1062          * Once PMU is loaded it stays in the list,
1063          * so we keep us from multiple reading/parsing
1064          * the pmu format definitions.
1065          */
1066         pmu = pmu_find(name);
1067         if (pmu)
1068                 return pmu;
1069
1070         return pmu_lookup(name);
1071 }
1072
1073 static struct perf_pmu_format *
1074 pmu_find_format(struct list_head *formats, const char *name)
1075 {
1076         struct perf_pmu_format *format;
1077
1078         list_for_each_entry(format, formats, list)
1079                 if (!strcmp(format->name, name))
1080                         return format;
1081
1082         return NULL;
1083 }
1084
1085 __u64 perf_pmu__format_bits(struct list_head *formats, const char *name)
1086 {
1087         struct perf_pmu_format *format = pmu_find_format(formats, name);
1088         __u64 bits = 0;
1089         int fbit;
1090
1091         if (!format)
1092                 return 0;
1093
1094         for_each_set_bit(fbit, format->bits, PERF_PMU_FORMAT_BITS)
1095                 bits |= 1ULL << fbit;
1096
1097         return bits;
1098 }
1099
1100 int perf_pmu__format_type(struct list_head *formats, const char *name)
1101 {
1102         struct perf_pmu_format *format = pmu_find_format(formats, name);
1103
1104         if (!format)
1105                 return -1;
1106
1107         return format->value;
1108 }
1109
1110 /*
1111  * Sets value based on the format definition (format parameter)
1112  * and unformatted value (value parameter).
1113  */
1114 static void pmu_format_value(unsigned long *format, __u64 value, __u64 *v,
1115                              bool zero)
1116 {
1117         unsigned long fbit, vbit;
1118
1119         for (fbit = 0, vbit = 0; fbit < PERF_PMU_FORMAT_BITS; fbit++) {
1120
1121                 if (!test_bit(fbit, format))
1122                         continue;
1123
1124                 if (value & (1llu << vbit++))
1125                         *v |= (1llu << fbit);
1126                 else if (zero)
1127                         *v &= ~(1llu << fbit);
1128         }
1129 }
1130
1131 static __u64 pmu_format_max_value(const unsigned long *format)
1132 {
1133         int w;
1134
1135         w = bitmap_weight(format, PERF_PMU_FORMAT_BITS);
1136         if (!w)
1137                 return 0;
1138         if (w < 64)
1139                 return (1ULL << w) - 1;
1140         return -1;
1141 }
1142
1143 /*
1144  * Term is a string term, and might be a param-term. Try to look up it's value
1145  * in the remaining terms.
1146  * - We have a term like "base-or-format-term=param-term",
1147  * - We need to find the value supplied for "param-term" (with param-term named
1148  *   in a config string) later on in the term list.
1149  */
1150 static int pmu_resolve_param_term(struct parse_events_term *term,
1151                                   struct list_head *head_terms,
1152                                   __u64 *value)
1153 {
1154         struct parse_events_term *t;
1155
1156         list_for_each_entry(t, head_terms, list) {
1157                 if (t->type_val == PARSE_EVENTS__TERM_TYPE_NUM &&
1158                     t->config && !strcmp(t->config, term->config)) {
1159                         t->used = true;
1160                         *value = t->val.num;
1161                         return 0;
1162                 }
1163         }
1164
1165         if (verbose > 0)
1166                 printf("Required parameter '%s' not specified\n", term->config);
1167
1168         return -1;
1169 }
1170
1171 static char *pmu_formats_string(struct list_head *formats)
1172 {
1173         struct perf_pmu_format *format;
1174         char *str = NULL;
1175         struct strbuf buf = STRBUF_INIT;
1176         unsigned i = 0;
1177
1178         if (!formats)
1179                 return NULL;
1180
1181         /* sysfs exported terms */
1182         list_for_each_entry(format, formats, list)
1183                 if (strbuf_addf(&buf, i++ ? ",%s" : "%s", format->name) < 0)
1184                         goto error;
1185
1186         str = strbuf_detach(&buf, NULL);
1187 error:
1188         strbuf_release(&buf);
1189
1190         return str;
1191 }
1192
1193 /*
1194  * Setup one of config[12] attr members based on the
1195  * user input data - term parameter.
1196  */
1197 static int pmu_config_term(const char *pmu_name,
1198                            struct list_head *formats,
1199                            struct perf_event_attr *attr,
1200                            struct parse_events_term *term,
1201                            struct list_head *head_terms,
1202                            bool zero, struct parse_events_error *err)
1203 {
1204         struct perf_pmu_format *format;
1205         __u64 *vp;
1206         __u64 val, max_val;
1207
1208         /*
1209          * If this is a parameter we've already used for parameterized-eval,
1210          * skip it in normal eval.
1211          */
1212         if (term->used)
1213                 return 0;
1214
1215         /*
1216          * Hardcoded terms should be already in, so nothing
1217          * to be done for them.
1218          */
1219         if (parse_events__is_hardcoded_term(term))
1220                 return 0;
1221
1222         format = pmu_find_format(formats, term->config);
1223         if (!format) {
1224                 char *pmu_term = pmu_formats_string(formats);
1225                 char *unknown_term;
1226                 char *help_msg;
1227
1228                 if (asprintf(&unknown_term,
1229                                 "unknown term '%s' for pmu '%s'",
1230                                 term->config, pmu_name) < 0)
1231                         unknown_term = NULL;
1232                 help_msg = parse_events_formats_error_string(pmu_term);
1233                 if (err) {
1234                         parse_events__handle_error(err, term->err_term,
1235                                                    unknown_term,
1236                                                    help_msg);
1237                 } else {
1238                         pr_debug("%s (%s)\n", unknown_term, help_msg);
1239                         free(unknown_term);
1240                 }
1241                 free(pmu_term);
1242                 return -EINVAL;
1243         }
1244
1245         switch (format->value) {
1246         case PERF_PMU_FORMAT_VALUE_CONFIG:
1247                 vp = &attr->config;
1248                 break;
1249         case PERF_PMU_FORMAT_VALUE_CONFIG1:
1250                 vp = &attr->config1;
1251                 break;
1252         case PERF_PMU_FORMAT_VALUE_CONFIG2:
1253                 vp = &attr->config2;
1254                 break;
1255         default:
1256                 return -EINVAL;
1257         }
1258
1259         /*
1260          * Either directly use a numeric term, or try to translate string terms
1261          * using event parameters.
1262          */
1263         if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) {
1264                 if (term->no_value &&
1265                     bitmap_weight(format->bits, PERF_PMU_FORMAT_BITS) > 1) {
1266                         if (err) {
1267                                 parse_events__handle_error(err, term->err_val,
1268                                            strdup("no value assigned for term"),
1269                                            NULL);
1270                         }
1271                         return -EINVAL;
1272                 }
1273
1274                 val = term->val.num;
1275         } else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) {
1276                 if (strcmp(term->val.str, "?")) {
1277                         if (verbose > 0) {
1278                                 pr_info("Invalid sysfs entry %s=%s\n",
1279                                                 term->config, term->val.str);
1280                         }
1281                         if (err) {
1282                                 parse_events__handle_error(err, term->err_val,
1283                                         strdup("expected numeric value"),
1284                                         NULL);
1285                         }
1286                         return -EINVAL;
1287                 }
1288
1289                 if (pmu_resolve_param_term(term, head_terms, &val))
1290                         return -EINVAL;
1291         } else
1292                 return -EINVAL;
1293
1294         max_val = pmu_format_max_value(format->bits);
1295         if (val > max_val) {
1296                 if (err) {
1297                         char *err_str;
1298
1299                         parse_events__handle_error(err, term->err_val,
1300                                 asprintf(&err_str,
1301                                     "value too big for format, maximum is %llu",
1302                                     (unsigned long long)max_val) < 0
1303                                     ? strdup("value too big for format")
1304                                     : err_str,
1305                                     NULL);
1306                         return -EINVAL;
1307                 }
1308                 /*
1309                  * Assume we don't care if !err, in which case the value will be
1310                  * silently truncated.
1311                  */
1312         }
1313
1314         pmu_format_value(format->bits, val, vp, zero);
1315         return 0;
1316 }
1317
1318 int perf_pmu__config_terms(const char *pmu_name, struct list_head *formats,
1319                            struct perf_event_attr *attr,
1320                            struct list_head *head_terms,
1321                            bool zero, struct parse_events_error *err)
1322 {
1323         struct parse_events_term *term;
1324
1325         list_for_each_entry(term, head_terms, list) {
1326                 if (pmu_config_term(pmu_name, formats, attr, term, head_terms,
1327                                     zero, err))
1328                         return -EINVAL;
1329         }
1330
1331         return 0;
1332 }
1333
1334 /*
1335  * Configures event's 'attr' parameter based on the:
1336  * 1) users input - specified in terms parameter
1337  * 2) pmu format definitions - specified by pmu parameter
1338  */
1339 int perf_pmu__config(struct perf_pmu *pmu, struct perf_event_attr *attr,
1340                      struct list_head *head_terms,
1341                      struct parse_events_error *err)
1342 {
1343         bool zero = !!pmu->default_config;
1344
1345         attr->type = pmu->type;
1346         return perf_pmu__config_terms(pmu->name, &pmu->format, attr,
1347                                       head_terms, zero, err);
1348 }
1349
1350 static struct perf_pmu_alias *pmu_find_alias(struct perf_pmu *pmu,
1351                                              struct parse_events_term *term)
1352 {
1353         struct perf_pmu_alias *alias;
1354         char *name;
1355
1356         if (parse_events__is_hardcoded_term(term))
1357                 return NULL;
1358
1359         if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) {
1360                 if (term->val.num != 1)
1361                         return NULL;
1362                 if (pmu_find_format(&pmu->format, term->config))
1363                         return NULL;
1364                 name = term->config;
1365         } else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) {
1366                 if (strcasecmp(term->config, "event"))
1367                         return NULL;
1368                 name = term->val.str;
1369         } else {
1370                 return NULL;
1371         }
1372
1373         list_for_each_entry(alias, &pmu->aliases, list) {
1374                 if (!strcasecmp(alias->name, name))
1375                         return alias;
1376         }
1377         return NULL;
1378 }
1379
1380
1381 static int check_info_data(struct perf_pmu_alias *alias,
1382                            struct perf_pmu_info *info)
1383 {
1384         /*
1385          * Only one term in event definition can
1386          * define unit, scale and snapshot, fail
1387          * if there's more than one.
1388          */
1389         if ((info->unit && alias->unit[0]) ||
1390             (info->scale && alias->scale) ||
1391             (info->snapshot && alias->snapshot))
1392                 return -EINVAL;
1393
1394         if (alias->unit[0])
1395                 info->unit = alias->unit;
1396
1397         if (alias->scale)
1398                 info->scale = alias->scale;
1399
1400         if (alias->snapshot)
1401                 info->snapshot = alias->snapshot;
1402
1403         return 0;
1404 }
1405
1406 /*
1407  * Find alias in the terms list and replace it with the terms
1408  * defined for the alias
1409  */
1410 int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms,
1411                           struct perf_pmu_info *info)
1412 {
1413         struct parse_events_term *term, *h;
1414         struct perf_pmu_alias *alias;
1415         int ret;
1416
1417         info->per_pkg = false;
1418
1419         /*
1420          * Mark unit and scale as not set
1421          * (different from default values, see below)
1422          */
1423         info->unit     = NULL;
1424         info->scale    = 0.0;
1425         info->snapshot = false;
1426         info->metric_expr = NULL;
1427         info->metric_name = NULL;
1428
1429         list_for_each_entry_safe(term, h, head_terms, list) {
1430                 alias = pmu_find_alias(pmu, term);
1431                 if (!alias)
1432                         continue;
1433                 ret = pmu_alias_terms(alias, &term->list);
1434                 if (ret)
1435                         return ret;
1436
1437                 ret = check_info_data(alias, info);
1438                 if (ret)
1439                         return ret;
1440
1441                 if (alias->per_pkg)
1442                         info->per_pkg = true;
1443                 info->metric_expr = alias->metric_expr;
1444                 info->metric_name = alias->metric_name;
1445
1446                 list_del_init(&term->list);
1447                 parse_events_term__delete(term);
1448         }
1449
1450         /*
1451          * if no unit or scale found in aliases, then
1452          * set defaults as for evsel
1453          * unit cannot left to NULL
1454          */
1455         if (info->unit == NULL)
1456                 info->unit   = "";
1457
1458         if (info->scale == 0.0)
1459                 info->scale  = 1.0;
1460
1461         return 0;
1462 }
1463
1464 int perf_pmu__new_format(struct list_head *list, char *name,
1465                          int config, unsigned long *bits)
1466 {
1467         struct perf_pmu_format *format;
1468
1469         format = zalloc(sizeof(*format));
1470         if (!format)
1471                 return -ENOMEM;
1472
1473         format->name = strdup(name);
1474         format->value = config;
1475         memcpy(format->bits, bits, sizeof(format->bits));
1476
1477         list_add_tail(&format->list, list);
1478         return 0;
1479 }
1480
1481 void perf_pmu__set_format(unsigned long *bits, long from, long to)
1482 {
1483         long b;
1484
1485         if (!to)
1486                 to = from;
1487
1488         memset(bits, 0, BITS_TO_BYTES(PERF_PMU_FORMAT_BITS));
1489         for (b = from; b <= to; b++)
1490                 set_bit(b, bits);
1491 }
1492
1493 void perf_pmu__del_formats(struct list_head *formats)
1494 {
1495         struct perf_pmu_format *fmt, *tmp;
1496
1497         list_for_each_entry_safe(fmt, tmp, formats, list) {
1498                 list_del(&fmt->list);
1499                 free(fmt->name);
1500                 free(fmt);
1501         }
1502 }
1503
1504 static int sub_non_neg(int a, int b)
1505 {
1506         if (b > a)
1507                 return 0;
1508         return a - b;
1509 }
1510
1511 static char *format_alias(char *buf, int len, struct perf_pmu *pmu,
1512                           struct perf_pmu_alias *alias)
1513 {
1514         struct parse_events_term *term;
1515         int used = snprintf(buf, len, "%s/%s", pmu->name, alias->name);
1516
1517         list_for_each_entry(term, &alias->terms, list) {
1518                 if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR)
1519                         used += snprintf(buf + used, sub_non_neg(len, used),
1520                                         ",%s=%s", term->config,
1521                                         term->val.str);
1522         }
1523
1524         if (sub_non_neg(len, used) > 0) {
1525                 buf[used] = '/';
1526                 used++;
1527         }
1528         if (sub_non_neg(len, used) > 0) {
1529                 buf[used] = '\0';
1530                 used++;
1531         } else
1532                 buf[len - 1] = '\0';
1533
1534         return buf;
1535 }
1536
1537 static char *format_alias_or(char *buf, int len, struct perf_pmu *pmu,
1538                              struct perf_pmu_alias *alias)
1539 {
1540         snprintf(buf, len, "%s OR %s/%s/", alias->name, pmu->name, alias->name);
1541         return buf;
1542 }
1543
1544 struct sevent {
1545         char *name;
1546         char *desc;
1547         char *topic;
1548         char *str;
1549         char *pmu;
1550         char *metric_expr;
1551         char *metric_name;
1552         int is_cpu;
1553 };
1554
1555 static int cmp_sevent(const void *a, const void *b)
1556 {
1557         const struct sevent *as = a;
1558         const struct sevent *bs = b;
1559
1560         /* Put extra events last */
1561         if (!!as->desc != !!bs->desc)
1562                 return !!as->desc - !!bs->desc;
1563         if (as->topic && bs->topic) {
1564                 int n = strcmp(as->topic, bs->topic);
1565
1566                 if (n)
1567                         return n;
1568         }
1569
1570         /* Order CPU core events to be first */
1571         if (as->is_cpu != bs->is_cpu)
1572                 return bs->is_cpu - as->is_cpu;
1573
1574         return strcmp(as->name, bs->name);
1575 }
1576
1577 static void wordwrap(char *s, int start, int max, int corr)
1578 {
1579         int column = start;
1580         int n;
1581
1582         while (*s) {
1583                 int wlen = strcspn(s, " \t");
1584
1585                 if (column + wlen >= max && column > start) {
1586                         printf("\n%*s", start, "");
1587                         column = start + corr;
1588                 }
1589                 n = printf("%s%.*s", column > start ? " " : "", wlen, s);
1590                 if (n <= 0)
1591                         break;
1592                 s += wlen;
1593                 column += n;
1594                 s = skip_spaces(s);
1595         }
1596 }
1597
1598 bool is_pmu_core(const char *name)
1599 {
1600         return !strcmp(name, "cpu") || is_arm_pmu_core(name);
1601 }
1602
1603 void print_pmu_events(const char *event_glob, bool name_only, bool quiet_flag,
1604                         bool long_desc, bool details_flag, bool deprecated)
1605 {
1606         struct perf_pmu *pmu;
1607         struct perf_pmu_alias *alias;
1608         char buf[1024];
1609         int printed = 0;
1610         int len, j;
1611         struct sevent *aliases;
1612         int numdesc = 0;
1613         int columns = pager_get_columns();
1614         char *topic = NULL;
1615
1616         pmu = NULL;
1617         len = 0;
1618         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1619                 list_for_each_entry(alias, &pmu->aliases, list)
1620                         len++;
1621                 if (pmu->selectable)
1622                         len++;
1623         }
1624         aliases = zalloc(sizeof(struct sevent) * len);
1625         if (!aliases)
1626                 goto out_enomem;
1627         pmu = NULL;
1628         j = 0;
1629         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1630                 list_for_each_entry(alias, &pmu->aliases, list) {
1631                         char *name = alias->desc ? alias->name :
1632                                 format_alias(buf, sizeof(buf), pmu, alias);
1633                         bool is_cpu = is_pmu_core(pmu->name);
1634
1635                         if (alias->deprecated && !deprecated)
1636                                 continue;
1637
1638                         if (event_glob != NULL &&
1639                             !(strglobmatch_nocase(name, event_glob) ||
1640                               (!is_cpu && strglobmatch_nocase(alias->name,
1641                                                        event_glob)) ||
1642                               (alias->topic &&
1643                                strglobmatch_nocase(alias->topic, event_glob))))
1644                                 continue;
1645
1646                         if (is_cpu && !name_only && !alias->desc)
1647                                 name = format_alias_or(buf, sizeof(buf), pmu, alias);
1648
1649                         aliases[j].name = name;
1650                         if (is_cpu && !name_only && !alias->desc)
1651                                 aliases[j].name = format_alias_or(buf,
1652                                                                   sizeof(buf),
1653                                                                   pmu, alias);
1654                         aliases[j].name = strdup(aliases[j].name);
1655                         if (!aliases[j].name)
1656                                 goto out_enomem;
1657
1658                         aliases[j].desc = long_desc ? alias->long_desc :
1659                                                 alias->desc;
1660                         aliases[j].topic = alias->topic;
1661                         aliases[j].str = alias->str;
1662                         aliases[j].pmu = pmu->name;
1663                         aliases[j].metric_expr = alias->metric_expr;
1664                         aliases[j].metric_name = alias->metric_name;
1665                         aliases[j].is_cpu = is_cpu;
1666                         j++;
1667                 }
1668                 if (pmu->selectable &&
1669                     (event_glob == NULL || strglobmatch(pmu->name, event_glob))) {
1670                         char *s;
1671                         if (asprintf(&s, "%s//", pmu->name) < 0)
1672                                 goto out_enomem;
1673                         aliases[j].name = s;
1674                         j++;
1675                 }
1676         }
1677         len = j;
1678         qsort(aliases, len, sizeof(struct sevent), cmp_sevent);
1679         for (j = 0; j < len; j++) {
1680                 /* Skip duplicates */
1681                 if (j > 0 && !strcmp(aliases[j].name, aliases[j - 1].name))
1682                         continue;
1683                 if (name_only) {
1684                         printf("%s ", aliases[j].name);
1685                         continue;
1686                 }
1687                 if (aliases[j].desc && !quiet_flag) {
1688                         if (numdesc++ == 0)
1689                                 printf("\n");
1690                         if (aliases[j].topic && (!topic ||
1691                                         strcmp(topic, aliases[j].topic))) {
1692                                 printf("%s%s:\n", topic ? "\n" : "",
1693                                                 aliases[j].topic);
1694                                 topic = aliases[j].topic;
1695                         }
1696                         printf("  %-50s\n", aliases[j].name);
1697                         printf("%*s", 8, "[");
1698                         wordwrap(aliases[j].desc, 8, columns, 0);
1699                         printf("]\n");
1700                         if (details_flag) {
1701                                 printf("%*s%s/%s/ ", 8, "", aliases[j].pmu, aliases[j].str);
1702                                 if (aliases[j].metric_name)
1703                                         printf(" MetricName: %s", aliases[j].metric_name);
1704                                 if (aliases[j].metric_expr)
1705                                         printf(" MetricExpr: %s", aliases[j].metric_expr);
1706                                 putchar('\n');
1707                         }
1708                 } else
1709                         printf("  %-50s [Kernel PMU event]\n", aliases[j].name);
1710                 printed++;
1711         }
1712         if (printed && pager_in_use())
1713                 printf("\n");
1714 out_free:
1715         for (j = 0; j < len; j++)
1716                 zfree(&aliases[j].name);
1717         zfree(&aliases);
1718         return;
1719
1720 out_enomem:
1721         printf("FATAL: not enough memory to print PMU events\n");
1722         if (aliases)
1723                 goto out_free;
1724 }
1725
1726 bool pmu_have_event(const char *pname, const char *name)
1727 {
1728         struct perf_pmu *pmu;
1729         struct perf_pmu_alias *alias;
1730
1731         pmu = NULL;
1732         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1733                 if (strcmp(pname, pmu->name))
1734                         continue;
1735                 list_for_each_entry(alias, &pmu->aliases, list)
1736                         if (!strcmp(alias->name, name))
1737                                 return true;
1738         }
1739         return false;
1740 }
1741
1742 static FILE *perf_pmu__open_file(struct perf_pmu *pmu, const char *name)
1743 {
1744         char path[PATH_MAX];
1745         const char *sysfs;
1746
1747         sysfs = sysfs__mountpoint();
1748         if (!sysfs)
1749                 return NULL;
1750
1751         snprintf(path, PATH_MAX,
1752                  "%s" EVENT_SOURCE_DEVICE_PATH "%s/%s", sysfs, pmu->name, name);
1753         if (!file_available(path))
1754                 return NULL;
1755         return fopen(path, "r");
1756 }
1757
1758 int perf_pmu__scan_file(struct perf_pmu *pmu, const char *name, const char *fmt,
1759                         ...)
1760 {
1761         va_list args;
1762         FILE *file;
1763         int ret = EOF;
1764
1765         va_start(args, fmt);
1766         file = perf_pmu__open_file(pmu, name);
1767         if (file) {
1768                 ret = vfscanf(file, fmt, args);
1769                 fclose(file);
1770         }
1771         va_end(args);
1772         return ret;
1773 }
1774
1775 static int perf_pmu__new_caps(struct list_head *list, char *name, char *value)
1776 {
1777         struct perf_pmu_caps *caps = zalloc(sizeof(*caps));
1778
1779         if (!caps)
1780                 return -ENOMEM;
1781
1782         caps->name = strdup(name);
1783         if (!caps->name)
1784                 goto free_caps;
1785         caps->value = strndup(value, strlen(value) - 1);
1786         if (!caps->value)
1787                 goto free_name;
1788         list_add_tail(&caps->list, list);
1789         return 0;
1790
1791 free_name:
1792         zfree(caps->name);
1793 free_caps:
1794         free(caps);
1795
1796         return -ENOMEM;
1797 }
1798
1799 /*
1800  * Reading/parsing the given pmu capabilities, which should be located at:
1801  * /sys/bus/event_source/devices/<dev>/caps as sysfs group attributes.
1802  * Return the number of capabilities
1803  */
1804 int perf_pmu__caps_parse(struct perf_pmu *pmu)
1805 {
1806         struct stat st;
1807         char caps_path[PATH_MAX];
1808         const char *sysfs = sysfs__mountpoint();
1809         DIR *caps_dir;
1810         struct dirent *evt_ent;
1811         int nr_caps = 0;
1812
1813         if (!sysfs)
1814                 return -1;
1815
1816         snprintf(caps_path, PATH_MAX,
1817                  "%s" EVENT_SOURCE_DEVICE_PATH "%s/caps", sysfs, pmu->name);
1818
1819         if (stat(caps_path, &st) < 0)
1820                 return 0;       /* no error if caps does not exist */
1821
1822         caps_dir = opendir(caps_path);
1823         if (!caps_dir)
1824                 return -EINVAL;
1825
1826         while ((evt_ent = readdir(caps_dir)) != NULL) {
1827                 char path[PATH_MAX + NAME_MAX + 1];
1828                 char *name = evt_ent->d_name;
1829                 char value[128];
1830                 FILE *file;
1831
1832                 if (!strcmp(name, ".") || !strcmp(name, ".."))
1833                         continue;
1834
1835                 snprintf(path, sizeof(path), "%s/%s", caps_path, name);
1836
1837                 file = fopen(path, "r");
1838                 if (!file)
1839                         continue;
1840
1841                 if (!fgets(value, sizeof(value), file) ||
1842                     (perf_pmu__new_caps(&pmu->caps, name, value) < 0)) {
1843                         fclose(file);
1844                         continue;
1845                 }
1846
1847                 nr_caps++;
1848                 fclose(file);
1849         }
1850
1851         closedir(caps_dir);
1852
1853         return nr_caps;
1854 }
1855
1856 void perf_pmu__warn_invalid_config(struct perf_pmu *pmu, __u64 config,
1857                                    char *name)
1858 {
1859         struct perf_pmu_format *format;
1860         __u64 masks = 0, bits;
1861         char buf[100];
1862         unsigned int i;
1863
1864         list_for_each_entry(format, &pmu->format, list) {
1865                 if (format->value != PERF_PMU_FORMAT_VALUE_CONFIG)
1866                         continue;
1867
1868                 for_each_set_bit(i, format->bits, PERF_PMU_FORMAT_BITS)
1869                         masks |= 1ULL << i;
1870         }
1871
1872         /*
1873          * Kernel doesn't export any valid format bits.
1874          */
1875         if (masks == 0)
1876                 return;
1877
1878         bits = config & ~masks;
1879         if (bits == 0)
1880                 return;
1881
1882         bitmap_scnprintf((unsigned long *)&bits, sizeof(bits) * 8, buf, sizeof(buf));
1883
1884         pr_warning("WARNING: event '%s' not valid (bits %s of config "
1885                    "'%llx' not supported by kernel)!\n",
1886                    name ?: "N/A", buf, config);
1887 }
1888
1889 bool perf_pmu__has_hybrid(void)
1890 {
1891         if (!hybrid_scanned) {
1892                 hybrid_scanned = true;
1893                 perf_pmu__scan(NULL);
1894         }
1895
1896         return !list_empty(&perf_pmu__hybrid_pmus);
1897 }
1898
1899 int perf_pmu__match(char *pattern, char *name, char *tok)
1900 {
1901         if (fnmatch(pattern, name, 0))
1902                 return -1;
1903
1904         if (tok && !perf_pmu__valid_suffix(name, tok))
1905                 return -1;
1906
1907         return 0;
1908 }