1#include <linux/list.h>
2#include <linux/compiler.h>
3#include <sys/types.h>
4#include <unistd.h>
5#include <stdio.h>
6#include <stdbool.h>
7#include <stdarg.h>
8#include <dirent.h>
9#include <api/fs/fs.h>
10#include <locale.h>
11#include "util.h"
12#include "pmu.h"
13#include "parse-events.h"
14#include "cpumap.h"
15#include "header.h"
16#include "pmu-events/pmu-events.h"
17#include "cache.h"
18
19struct perf_pmu_format {
20 char *name;
21 int value;
22 DECLARE_BITMAP(bits, PERF_PMU_FORMAT_BITS);
23 struct list_head list;
24};
25
26#define EVENT_SOURCE_DEVICE_PATH "/bus/event_source/devices/"
27
28int perf_pmu_parse(struct list_head *list, char *name);
29extern FILE *perf_pmu_in;
30
31static LIST_HEAD(pmus);
32
33
34
35
36
37int perf_pmu__format_parse(char *dir, struct list_head *head)
38{
39 struct dirent *evt_ent;
40 DIR *format_dir;
41 int ret = 0;
42
43 format_dir = opendir(dir);
44 if (!format_dir)
45 return -EINVAL;
46
47 while (!ret && (evt_ent = readdir(format_dir))) {
48 char path[PATH_MAX];
49 char *name = evt_ent->d_name;
50 FILE *file;
51
52 if (!strcmp(name, ".") || !strcmp(name, ".."))
53 continue;
54
55 snprintf(path, PATH_MAX, "%s/%s", dir, name);
56
57 ret = -EINVAL;
58 file = fopen(path, "r");
59 if (!file)
60 break;
61
62 perf_pmu_in = file;
63 ret = perf_pmu_parse(head, name);
64 fclose(file);
65 }
66
67 closedir(format_dir);
68 return ret;
69}
70
71
72
73
74
75
76static int pmu_format(const char *name, struct list_head *format)
77{
78 struct stat st;
79 char path[PATH_MAX];
80 const char *sysfs = sysfs__mountpoint();
81
82 if (!sysfs)
83 return -1;
84
85 snprintf(path, PATH_MAX,
86 "%s" EVENT_SOURCE_DEVICE_PATH "%s/format", sysfs, name);
87
88 if (stat(path, &st) < 0)
89 return 0;
90
91 if (perf_pmu__format_parse(path, format))
92 return -1;
93
94 return 0;
95}
96
97static int perf_pmu__parse_scale(struct perf_pmu_alias *alias, char *dir, char *name)
98{
99 struct stat st;
100 ssize_t sret;
101 char scale[128];
102 int fd, ret = -1;
103 char path[PATH_MAX];
104 char *lc;
105
106 snprintf(path, PATH_MAX, "%s/%s.scale", dir, name);
107
108 fd = open(path, O_RDONLY);
109 if (fd == -1)
110 return -1;
111
112 if (fstat(fd, &st) < 0)
113 goto error;
114
115 sret = read(fd, scale, sizeof(scale)-1);
116 if (sret < 0)
117 goto error;
118
119 if (scale[sret - 1] == '\n')
120 scale[sret - 1] = '\0';
121 else
122 scale[sret] = '\0';
123
124
125
126
127 lc = setlocale(LC_NUMERIC, NULL);
128
129
130
131
132
133
134 lc = strdup(lc);
135 if (!lc) {
136 ret = -ENOMEM;
137 goto error;
138 }
139
140
141
142
143
144
145 setlocale(LC_NUMERIC, "C");
146
147 alias->scale = strtod(scale, NULL);
148
149
150 setlocale(LC_NUMERIC, lc);
151
152 free(lc);
153
154 ret = 0;
155error:
156 close(fd);
157 return ret;
158}
159
160static int perf_pmu__parse_unit(struct perf_pmu_alias *alias, char *dir, char *name)
161{
162 char path[PATH_MAX];
163 ssize_t sret;
164 int fd;
165
166 snprintf(path, PATH_MAX, "%s/%s.unit", dir, name);
167
168 fd = open(path, O_RDONLY);
169 if (fd == -1)
170 return -1;
171
172 sret = read(fd, alias->unit, UNIT_MAX_LEN);
173 if (sret < 0)
174 goto error;
175
176 close(fd);
177
178 if (alias->unit[sret - 1] == '\n')
179 alias->unit[sret - 1] = '\0';
180 else
181 alias->unit[sret] = '\0';
182
183 return 0;
184error:
185 close(fd);
186 alias->unit[0] = '\0';
187 return -1;
188}
189
190static int
191perf_pmu__parse_per_pkg(struct perf_pmu_alias *alias, char *dir, char *name)
192{
193 char path[PATH_MAX];
194 int fd;
195
196 snprintf(path, PATH_MAX, "%s/%s.per-pkg", dir, name);
197
198 fd = open(path, O_RDONLY);
199 if (fd == -1)
200 return -1;
201
202 close(fd);
203
204 alias->per_pkg = true;
205 return 0;
206}
207
208static int perf_pmu__parse_snapshot(struct perf_pmu_alias *alias,
209 char *dir, char *name)
210{
211 char path[PATH_MAX];
212 int fd;
213
214 snprintf(path, PATH_MAX, "%s/%s.snapshot", dir, name);
215
216 fd = open(path, O_RDONLY);
217 if (fd == -1)
218 return -1;
219
220 alias->snapshot = true;
221 close(fd);
222 return 0;
223}
224
225static int __perf_pmu__new_alias(struct list_head *list, char *dir, char *name,
226 char *desc, char *val, char *long_desc,
227 char *topic)
228{
229 struct perf_pmu_alias *alias;
230 int ret;
231
232 alias = malloc(sizeof(*alias));
233 if (!alias)
234 return -ENOMEM;
235
236 INIT_LIST_HEAD(&alias->terms);
237 alias->scale = 1.0;
238 alias->unit[0] = '\0';
239 alias->per_pkg = false;
240 alias->snapshot = false;
241
242 ret = parse_events_terms(&alias->terms, val);
243 if (ret) {
244 pr_err("Cannot parse alias %s: %d\n", val, ret);
245 free(alias);
246 return ret;
247 }
248
249 alias->name = strdup(name);
250 if (dir) {
251
252
253
254 perf_pmu__parse_unit(alias, dir, name);
255 perf_pmu__parse_scale(alias, dir, name);
256 perf_pmu__parse_per_pkg(alias, dir, name);
257 perf_pmu__parse_snapshot(alias, dir, name);
258 }
259
260 alias->desc = desc ? strdup(desc) : NULL;
261 alias->long_desc = long_desc ? strdup(long_desc) :
262 desc ? strdup(desc) : NULL;
263 alias->topic = topic ? strdup(topic) : NULL;
264
265 list_add_tail(&alias->list, list);
266
267 return 0;
268}
269
270static int perf_pmu__new_alias(struct list_head *list, char *dir, char *name, FILE *file)
271{
272 char buf[256];
273 int ret;
274
275 ret = fread(buf, 1, sizeof(buf), file);
276 if (ret == 0)
277 return -EINVAL;
278
279 buf[ret] = 0;
280
281 return __perf_pmu__new_alias(list, dir, name, NULL, buf, NULL, NULL);
282}
283
284static inline bool pmu_alias_info_file(char *name)
285{
286 size_t len;
287
288 len = strlen(name);
289 if (len > 5 && !strcmp(name + len - 5, ".unit"))
290 return true;
291 if (len > 6 && !strcmp(name + len - 6, ".scale"))
292 return true;
293 if (len > 8 && !strcmp(name + len - 8, ".per-pkg"))
294 return true;
295 if (len > 9 && !strcmp(name + len - 9, ".snapshot"))
296 return true;
297
298 return false;
299}
300
301
302
303
304
305static int pmu_aliases_parse(char *dir, struct list_head *head)
306{
307 struct dirent *evt_ent;
308 DIR *event_dir;
309
310 event_dir = opendir(dir);
311 if (!event_dir)
312 return -EINVAL;
313
314 while ((evt_ent = readdir(event_dir))) {
315 char path[PATH_MAX];
316 char *name = evt_ent->d_name;
317 FILE *file;
318
319 if (!strcmp(name, ".") || !strcmp(name, ".."))
320 continue;
321
322
323
324
325 if (pmu_alias_info_file(name))
326 continue;
327
328 snprintf(path, PATH_MAX, "%s/%s", dir, name);
329
330 file = fopen(path, "r");
331 if (!file) {
332 pr_debug("Cannot open %s\n", path);
333 continue;
334 }
335
336 if (perf_pmu__new_alias(head, dir, name, file) < 0)
337 pr_debug("Cannot set up %s\n", name);
338 fclose(file);
339 }
340
341 closedir(event_dir);
342 return 0;
343}
344
345
346
347
348
349static int pmu_aliases(const char *name, struct list_head *head)
350{
351 struct stat st;
352 char path[PATH_MAX];
353 const char *sysfs = sysfs__mountpoint();
354
355 if (!sysfs)
356 return -1;
357
358 snprintf(path, PATH_MAX,
359 "%s/bus/event_source/devices/%s/events", sysfs, name);
360
361 if (stat(path, &st) < 0)
362 return 0;
363
364 if (pmu_aliases_parse(path, head))
365 return -1;
366
367 return 0;
368}
369
370static int pmu_alias_terms(struct perf_pmu_alias *alias,
371 struct list_head *terms)
372{
373 struct parse_events_term *term, *cloned;
374 LIST_HEAD(list);
375 int ret;
376
377 list_for_each_entry(term, &alias->terms, list) {
378 ret = parse_events_term__clone(&cloned, term);
379 if (ret) {
380 parse_events_terms__purge(&list);
381 return ret;
382 }
383 list_add_tail(&cloned->list, &list);
384 }
385 list_splice(&list, terms);
386 return 0;
387}
388
389
390
391
392
393
394static int pmu_type(const char *name, __u32 *type)
395{
396 struct stat st;
397 char path[PATH_MAX];
398 FILE *file;
399 int ret = 0;
400 const char *sysfs = sysfs__mountpoint();
401
402 if (!sysfs)
403 return -1;
404
405 snprintf(path, PATH_MAX,
406 "%s" EVENT_SOURCE_DEVICE_PATH "%s/type", sysfs, name);
407
408 if (stat(path, &st) < 0)
409 return -1;
410
411 file = fopen(path, "r");
412 if (!file)
413 return -EINVAL;
414
415 if (1 != fscanf(file, "%u", type))
416 ret = -1;
417
418 fclose(file);
419 return ret;
420}
421
422
423static void pmu_read_sysfs(void)
424{
425 char path[PATH_MAX];
426 DIR *dir;
427 struct dirent *dent;
428 const char *sysfs = sysfs__mountpoint();
429
430 if (!sysfs)
431 return;
432
433 snprintf(path, PATH_MAX,
434 "%s" EVENT_SOURCE_DEVICE_PATH, sysfs);
435
436 dir = opendir(path);
437 if (!dir)
438 return;
439
440 while ((dent = readdir(dir))) {
441 if (!strcmp(dent->d_name, ".") || !strcmp(dent->d_name, ".."))
442 continue;
443
444 perf_pmu__find(dent->d_name);
445 }
446
447 closedir(dir);
448}
449
450static struct cpu_map *pmu_cpumask(const char *name)
451{
452 struct stat st;
453 char path[PATH_MAX];
454 FILE *file;
455 struct cpu_map *cpus;
456 const char *sysfs = sysfs__mountpoint();
457 const char *templates[] = {
458 "%s/bus/event_source/devices/%s/cpumask",
459 "%s/bus/event_source/devices/%s/cpus",
460 NULL
461 };
462 const char **template;
463
464 if (!sysfs)
465 return NULL;
466
467 for (template = templates; *template; template++) {
468 snprintf(path, PATH_MAX, *template, sysfs, name);
469 if (stat(path, &st) == 0)
470 break;
471 }
472
473 if (!*template)
474 return NULL;
475
476 file = fopen(path, "r");
477 if (!file)
478 return NULL;
479
480 cpus = cpu_map__read(file);
481 fclose(file);
482 return cpus;
483}
484
485
486
487
488
489
490
491char * __weak get_cpuid_str(void)
492{
493 return NULL;
494}
495
496
497
498
499
500
501static void pmu_add_cpu_aliases(struct list_head *head)
502{
503 int i;
504 struct pmu_events_map *map;
505 struct pmu_event *pe;
506 char *cpuid;
507
508 cpuid = getenv("PERF_CPUID");
509 if (cpuid)
510 cpuid = strdup(cpuid);
511 if (!cpuid)
512 cpuid = get_cpuid_str();
513 if (!cpuid)
514 return;
515
516 pr_debug("Using CPUID %s\n", cpuid);
517
518 i = 0;
519 while (1) {
520 map = &pmu_events_map[i++];
521 if (!map->table)
522 goto out;
523
524 if (!strcmp(map->cpuid, cpuid))
525 break;
526 }
527
528
529
530
531 i = 0;
532 while (1) {
533 pe = &map->table[i++];
534 if (!pe->name)
535 break;
536
537
538 __perf_pmu__new_alias(head, NULL, (char *)pe->name,
539 (char *)pe->desc, (char *)pe->event,
540 (char *)pe->long_desc, (char *)pe->topic);
541 }
542
543out:
544 free(cpuid);
545}
546
547struct perf_event_attr * __weak
548perf_pmu__get_default_config(struct perf_pmu *pmu __maybe_unused)
549{
550 return NULL;
551}
552
553static struct perf_pmu *pmu_lookup(const char *name)
554{
555 struct perf_pmu *pmu;
556 LIST_HEAD(format);
557 LIST_HEAD(aliases);
558 __u32 type;
559
560
561
562
563
564
565 if (pmu_format(name, &format))
566 return NULL;
567
568 if (pmu_aliases(name, &aliases))
569 return NULL;
570
571 if (!strcmp(name, "cpu"))
572 pmu_add_cpu_aliases(&aliases);
573
574 if (pmu_type(name, &type))
575 return NULL;
576
577 pmu = zalloc(sizeof(*pmu));
578 if (!pmu)
579 return NULL;
580
581 pmu->cpus = pmu_cpumask(name);
582
583 INIT_LIST_HEAD(&pmu->format);
584 INIT_LIST_HEAD(&pmu->aliases);
585 list_splice(&format, &pmu->format);
586 list_splice(&aliases, &pmu->aliases);
587 pmu->name = strdup(name);
588 pmu->type = type;
589 list_add_tail(&pmu->list, &pmus);
590
591 pmu->default_config = perf_pmu__get_default_config(pmu);
592
593 return pmu;
594}
595
596static struct perf_pmu *pmu_find(const char *name)
597{
598 struct perf_pmu *pmu;
599
600 list_for_each_entry(pmu, &pmus, list)
601 if (!strcmp(pmu->name, name))
602 return pmu;
603
604 return NULL;
605}
606
607struct perf_pmu *perf_pmu__scan(struct perf_pmu *pmu)
608{
609
610
611
612
613 if (!pmu) {
614 pmu_read_sysfs();
615 pmu = list_prepare_entry(pmu, &pmus, list);
616 }
617 list_for_each_entry_continue(pmu, &pmus, list)
618 return pmu;
619 return NULL;
620}
621
622struct perf_pmu *perf_pmu__find(const char *name)
623{
624 struct perf_pmu *pmu;
625
626
627
628
629
630
631 pmu = pmu_find(name);
632 if (pmu)
633 return pmu;
634
635 return pmu_lookup(name);
636}
637
638static struct perf_pmu_format *
639pmu_find_format(struct list_head *formats, const char *name)
640{
641 struct perf_pmu_format *format;
642
643 list_for_each_entry(format, formats, list)
644 if (!strcmp(format->name, name))
645 return format;
646
647 return NULL;
648}
649
650__u64 perf_pmu__format_bits(struct list_head *formats, const char *name)
651{
652 struct perf_pmu_format *format = pmu_find_format(formats, name);
653 __u64 bits = 0;
654 int fbit;
655
656 if (!format)
657 return 0;
658
659 for_each_set_bit(fbit, format->bits, PERF_PMU_FORMAT_BITS)
660 bits |= 1ULL << fbit;
661
662 return bits;
663}
664
665
666
667
668
669static void pmu_format_value(unsigned long *format, __u64 value, __u64 *v,
670 bool zero)
671{
672 unsigned long fbit, vbit;
673
674 for (fbit = 0, vbit = 0; fbit < PERF_PMU_FORMAT_BITS; fbit++) {
675
676 if (!test_bit(fbit, format))
677 continue;
678
679 if (value & (1llu << vbit++))
680 *v |= (1llu << fbit);
681 else if (zero)
682 *v &= ~(1llu << fbit);
683 }
684}
685
686static __u64 pmu_format_max_value(const unsigned long *format)
687{
688 __u64 w = 0;
689 int fbit;
690
691 for_each_set_bit(fbit, format, PERF_PMU_FORMAT_BITS)
692 w |= (1ULL << fbit);
693
694 return w;
695}
696
697
698
699
700
701
702
703
704static int pmu_resolve_param_term(struct parse_events_term *term,
705 struct list_head *head_terms,
706 __u64 *value)
707{
708 struct parse_events_term *t;
709
710 list_for_each_entry(t, head_terms, list) {
711 if (t->type_val == PARSE_EVENTS__TERM_TYPE_NUM) {
712 if (!strcmp(t->config, term->config)) {
713 t->used = true;
714 *value = t->val.num;
715 return 0;
716 }
717 }
718 }
719
720 if (verbose)
721 printf("Required parameter '%s' not specified\n", term->config);
722
723 return -1;
724}
725
726static char *pmu_formats_string(struct list_head *formats)
727{
728 struct perf_pmu_format *format;
729 char *str = NULL;
730 struct strbuf buf = STRBUF_INIT;
731 unsigned i = 0;
732
733 if (!formats)
734 return NULL;
735
736
737 list_for_each_entry(format, formats, list)
738 if (strbuf_addf(&buf, i++ ? ",%s" : "%s", format->name) < 0)
739 goto error;
740
741 str = strbuf_detach(&buf, NULL);
742error:
743 strbuf_release(&buf);
744
745 return str;
746}
747
748
749
750
751
752static int pmu_config_term(struct list_head *formats,
753 struct perf_event_attr *attr,
754 struct parse_events_term *term,
755 struct list_head *head_terms,
756 bool zero, struct parse_events_error *err)
757{
758 struct perf_pmu_format *format;
759 __u64 *vp;
760 __u64 val, max_val;
761
762
763
764
765
766 if (term->used)
767 return 0;
768
769
770
771
772
773 if (parse_events__is_hardcoded_term(term))
774 return 0;
775
776 format = pmu_find_format(formats, term->config);
777 if (!format) {
778 if (verbose)
779 printf("Invalid event/parameter '%s'\n", term->config);
780 if (err) {
781 char *pmu_term = pmu_formats_string(formats);
782
783 err->idx = term->err_term;
784 err->str = strdup("unknown term");
785 err->help = parse_events_formats_error_string(pmu_term);
786 free(pmu_term);
787 }
788 return -EINVAL;
789 }
790
791 switch (format->value) {
792 case PERF_PMU_FORMAT_VALUE_CONFIG:
793 vp = &attr->config;
794 break;
795 case PERF_PMU_FORMAT_VALUE_CONFIG1:
796 vp = &attr->config1;
797 break;
798 case PERF_PMU_FORMAT_VALUE_CONFIG2:
799 vp = &attr->config2;
800 break;
801 default:
802 return -EINVAL;
803 }
804
805
806
807
808
809 if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM)
810 val = term->val.num;
811 else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) {
812 if (strcmp(term->val.str, "?")) {
813 if (verbose) {
814 pr_info("Invalid sysfs entry %s=%s\n",
815 term->config, term->val.str);
816 }
817 if (err) {
818 err->idx = term->err_val;
819 err->str = strdup("expected numeric value");
820 }
821 return -EINVAL;
822 }
823
824 if (pmu_resolve_param_term(term, head_terms, &val))
825 return -EINVAL;
826 } else
827 return -EINVAL;
828
829 max_val = pmu_format_max_value(format->bits);
830 if (val > max_val) {
831 if (err) {
832 err->idx = term->err_val;
833 if (asprintf(&err->str,
834 "value too big for format, maximum is %llu",
835 (unsigned long long)max_val) < 0)
836 err->str = strdup("value too big for format");
837 return -EINVAL;
838 }
839
840
841
842
843 }
844
845 pmu_format_value(format->bits, val, vp, zero);
846 return 0;
847}
848
849int perf_pmu__config_terms(struct list_head *formats,
850 struct perf_event_attr *attr,
851 struct list_head *head_terms,
852 bool zero, struct parse_events_error *err)
853{
854 struct parse_events_term *term;
855
856 list_for_each_entry(term, head_terms, list) {
857 if (pmu_config_term(formats, attr, term, head_terms,
858 zero, err))
859 return -EINVAL;
860 }
861
862 return 0;
863}
864
865
866
867
868
869
870int perf_pmu__config(struct perf_pmu *pmu, struct perf_event_attr *attr,
871 struct list_head *head_terms,
872 struct parse_events_error *err)
873{
874 bool zero = !!pmu->default_config;
875
876 attr->type = pmu->type;
877 return perf_pmu__config_terms(&pmu->format, attr, head_terms,
878 zero, err);
879}
880
881static struct perf_pmu_alias *pmu_find_alias(struct perf_pmu *pmu,
882 struct parse_events_term *term)
883{
884 struct perf_pmu_alias *alias;
885 char *name;
886
887 if (parse_events__is_hardcoded_term(term))
888 return NULL;
889
890 if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) {
891 if (term->val.num != 1)
892 return NULL;
893 if (pmu_find_format(&pmu->format, term->config))
894 return NULL;
895 name = term->config;
896 } else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) {
897 if (strcasecmp(term->config, "event"))
898 return NULL;
899 name = term->val.str;
900 } else {
901 return NULL;
902 }
903
904 list_for_each_entry(alias, &pmu->aliases, list) {
905 if (!strcasecmp(alias->name, name))
906 return alias;
907 }
908 return NULL;
909}
910
911
912static int check_info_data(struct perf_pmu_alias *alias,
913 struct perf_pmu_info *info)
914{
915
916
917
918
919
920 if ((info->unit && alias->unit) ||
921 (info->scale && alias->scale) ||
922 (info->snapshot && alias->snapshot))
923 return -EINVAL;
924
925 if (alias->unit)
926 info->unit = alias->unit;
927
928 if (alias->scale)
929 info->scale = alias->scale;
930
931 if (alias->snapshot)
932 info->snapshot = alias->snapshot;
933
934 return 0;
935}
936
937
938
939
940
941int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms,
942 struct perf_pmu_info *info)
943{
944 struct parse_events_term *term, *h;
945 struct perf_pmu_alias *alias;
946 int ret;
947
948 info->per_pkg = false;
949
950
951
952
953
954 info->unit = NULL;
955 info->scale = 0.0;
956 info->snapshot = false;
957
958 list_for_each_entry_safe(term, h, head_terms, list) {
959 alias = pmu_find_alias(pmu, term);
960 if (!alias)
961 continue;
962 ret = pmu_alias_terms(alias, &term->list);
963 if (ret)
964 return ret;
965
966 ret = check_info_data(alias, info);
967 if (ret)
968 return ret;
969
970 if (alias->per_pkg)
971 info->per_pkg = true;
972
973 list_del(&term->list);
974 free(term);
975 }
976
977
978
979
980
981
982 if (info->unit == NULL)
983 info->unit = "";
984
985 if (info->scale == 0.0)
986 info->scale = 1.0;
987
988 return 0;
989}
990
991int perf_pmu__new_format(struct list_head *list, char *name,
992 int config, unsigned long *bits)
993{
994 struct perf_pmu_format *format;
995
996 format = zalloc(sizeof(*format));
997 if (!format)
998 return -ENOMEM;
999
1000 format->name = strdup(name);
1001 format->value = config;
1002 memcpy(format->bits, bits, sizeof(format->bits));
1003
1004 list_add_tail(&format->list, list);
1005 return 0;
1006}
1007
1008void perf_pmu__set_format(unsigned long *bits, long from, long to)
1009{
1010 long b;
1011
1012 if (!to)
1013 to = from;
1014
1015 memset(bits, 0, BITS_TO_BYTES(PERF_PMU_FORMAT_BITS));
1016 for (b = from; b <= to; b++)
1017 set_bit(b, bits);
1018}
1019
1020static int sub_non_neg(int a, int b)
1021{
1022 if (b > a)
1023 return 0;
1024 return a - b;
1025}
1026
1027static char *format_alias(char *buf, int len, struct perf_pmu *pmu,
1028 struct perf_pmu_alias *alias)
1029{
1030 struct parse_events_term *term;
1031 int used = snprintf(buf, len, "%s/%s", pmu->name, alias->name);
1032
1033 list_for_each_entry(term, &alias->terms, list) {
1034 if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR)
1035 used += snprintf(buf + used, sub_non_neg(len, used),
1036 ",%s=%s", term->config,
1037 term->val.str);
1038 }
1039
1040 if (sub_non_neg(len, used) > 0) {
1041 buf[used] = '/';
1042 used++;
1043 }
1044 if (sub_non_neg(len, used) > 0) {
1045 buf[used] = '\0';
1046 used++;
1047 } else
1048 buf[len - 1] = '\0';
1049
1050 return buf;
1051}
1052
1053static char *format_alias_or(char *buf, int len, struct perf_pmu *pmu,
1054 struct perf_pmu_alias *alias)
1055{
1056 snprintf(buf, len, "%s OR %s/%s/", alias->name, pmu->name, alias->name);
1057 return buf;
1058}
1059
1060struct sevent {
1061 char *name;
1062 char *desc;
1063 char *topic;
1064};
1065
1066static int cmp_sevent(const void *a, const void *b)
1067{
1068 const struct sevent *as = a;
1069 const struct sevent *bs = b;
1070
1071
1072 if (!!as->desc != !!bs->desc)
1073 return !!as->desc - !!bs->desc;
1074 if (as->topic && bs->topic) {
1075 int n = strcmp(as->topic, bs->topic);
1076
1077 if (n)
1078 return n;
1079 }
1080 return strcmp(as->name, bs->name);
1081}
1082
1083static void wordwrap(char *s, int start, int max, int corr)
1084{
1085 int column = start;
1086 int n;
1087
1088 while (*s) {
1089 int wlen = strcspn(s, " \t");
1090
1091 if (column + wlen >= max && column > start) {
1092 printf("\n%*s", start, "");
1093 column = start + corr;
1094 }
1095 n = printf("%s%.*s", column > start ? " " : "", wlen, s);
1096 if (n <= 0)
1097 break;
1098 s += wlen;
1099 column += n;
1100 while (isspace(*s))
1101 s++;
1102 }
1103}
1104
1105void print_pmu_events(const char *event_glob, bool name_only, bool quiet_flag,
1106 bool long_desc)
1107{
1108 struct perf_pmu *pmu;
1109 struct perf_pmu_alias *alias;
1110 char buf[1024];
1111 int printed = 0;
1112 int len, j;
1113 struct sevent *aliases;
1114 int numdesc = 0;
1115 int columns = pager_get_columns();
1116 char *topic = NULL;
1117
1118 pmu = NULL;
1119 len = 0;
1120 while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1121 list_for_each_entry(alias, &pmu->aliases, list)
1122 len++;
1123 if (pmu->selectable)
1124 len++;
1125 }
1126 aliases = zalloc(sizeof(struct sevent) * len);
1127 if (!aliases)
1128 goto out_enomem;
1129 pmu = NULL;
1130 j = 0;
1131 while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1132 list_for_each_entry(alias, &pmu->aliases, list) {
1133 char *name = alias->desc ? alias->name :
1134 format_alias(buf, sizeof(buf), pmu, alias);
1135 bool is_cpu = !strcmp(pmu->name, "cpu");
1136
1137 if (event_glob != NULL &&
1138 !(strglobmatch(name, event_glob) ||
1139 (!is_cpu && strglobmatch(alias->name,
1140 event_glob))))
1141 continue;
1142
1143 if (is_cpu && !name_only && !alias->desc)
1144 name = format_alias_or(buf, sizeof(buf), pmu, alias);
1145
1146 aliases[j].name = name;
1147 if (is_cpu && !name_only && !alias->desc)
1148 aliases[j].name = format_alias_or(buf,
1149 sizeof(buf),
1150 pmu, alias);
1151 aliases[j].name = strdup(aliases[j].name);
1152 if (!aliases[j].name)
1153 goto out_enomem;
1154
1155 aliases[j].desc = long_desc ? alias->long_desc :
1156 alias->desc;
1157 aliases[j].topic = alias->topic;
1158 j++;
1159 }
1160 if (pmu->selectable &&
1161 (event_glob == NULL || strglobmatch(pmu->name, event_glob))) {
1162 char *s;
1163 if (asprintf(&s, "%s//", pmu->name) < 0)
1164 goto out_enomem;
1165 aliases[j].name = s;
1166 j++;
1167 }
1168 }
1169 len = j;
1170 qsort(aliases, len, sizeof(struct sevent), cmp_sevent);
1171 for (j = 0; j < len; j++) {
1172 if (name_only) {
1173 printf("%s ", aliases[j].name);
1174 continue;
1175 }
1176 if (aliases[j].desc && !quiet_flag) {
1177 if (numdesc++ == 0)
1178 printf("\n");
1179 if (aliases[j].topic && (!topic ||
1180 strcmp(topic, aliases[j].topic))) {
1181 printf("%s%s:\n", topic ? "\n" : "",
1182 aliases[j].topic);
1183 topic = aliases[j].topic;
1184 }
1185 printf(" %-50s\n", aliases[j].name);
1186 printf("%*s", 8, "[");
1187 wordwrap(aliases[j].desc, 8, columns, 0);
1188 printf("]\n");
1189 } else
1190 printf(" %-50s [Kernel PMU event]\n", aliases[j].name);
1191 printed++;
1192 }
1193 if (printed && pager_in_use())
1194 printf("\n");
1195out_free:
1196 for (j = 0; j < len; j++)
1197 zfree(&aliases[j].name);
1198 zfree(&aliases);
1199 return;
1200
1201out_enomem:
1202 printf("FATAL: not enough memory to print PMU events\n");
1203 if (aliases)
1204 goto out_free;
1205}
1206
1207bool pmu_have_event(const char *pname, const char *name)
1208{
1209 struct perf_pmu *pmu;
1210 struct perf_pmu_alias *alias;
1211
1212 pmu = NULL;
1213 while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1214 if (strcmp(pname, pmu->name))
1215 continue;
1216 list_for_each_entry(alias, &pmu->aliases, list)
1217 if (!strcmp(alias->name, name))
1218 return true;
1219 }
1220 return false;
1221}
1222
1223static FILE *perf_pmu__open_file(struct perf_pmu *pmu, const char *name)
1224{
1225 struct stat st;
1226 char path[PATH_MAX];
1227 const char *sysfs;
1228
1229 sysfs = sysfs__mountpoint();
1230 if (!sysfs)
1231 return NULL;
1232
1233 snprintf(path, PATH_MAX,
1234 "%s" EVENT_SOURCE_DEVICE_PATH "%s/%s", sysfs, pmu->name, name);
1235
1236 if (stat(path, &st) < 0)
1237 return NULL;
1238
1239 return fopen(path, "r");
1240}
1241
1242int perf_pmu__scan_file(struct perf_pmu *pmu, const char *name, const char *fmt,
1243 ...)
1244{
1245 va_list args;
1246 FILE *file;
1247 int ret = EOF;
1248
1249 va_start(args, fmt);
1250 file = perf_pmu__open_file(pmu, name);
1251 if (file) {
1252 ret = vfscanf(file, fmt, args);
1253 fclose(file);
1254 }
1255 va_end(args);
1256 return ret;
1257}
1258