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