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