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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
cd82a32e | 2 | #include <linux/list.h> |
c5de47f2 | 3 | #include <linux/compiler.h> |
32858480 | 4 | #include <linux/string.h> |
7f7c536f | 5 | #include <linux/zalloc.h> |
c47a5599 | 6 | #include <linux/ctype.h> |
cd82a32e | 7 | #include <sys/types.h> |
c23c2a0f | 8 | #include <fcntl.h> |
7a8ef4c4 | 9 | #include <sys/stat.h> |
cd82a32e JO |
10 | #include <unistd.h> |
11 | #include <stdio.h> | |
dc0a6202 | 12 | #include <stdbool.h> |
cd82a32e | 13 | #include <dirent.h> |
cd0cfad7 | 14 | #include <api/fs/fs.h> |
410136f5 | 15 | #include <locale.h> |
c47a5599 | 16 | #include <fnmatch.h> |
acef233b | 17 | #include <math.h> |
5e51b0bb | 18 | #include "debug.h" |
e12ee9f7 | 19 | #include "evsel.h" |
cd82a32e | 20 | #include "pmu.h" |
336b92da | 21 | #include "pmus.h" |
c7e97f21 NK |
22 | #include <util/pmu-bison.h> |
23 | #include <util/pmu-flex.h> | |
cd82a32e | 24 | #include "parse-events.h" |
e5c6109f | 25 | #include "print-events.h" |
933f82ff | 26 | #include "header.h" |
a067558e | 27 | #include "string2.h" |
fa0d9846 | 28 | #include "strbuf.h" |
d9664582 | 29 | #include "fncache.h" |
6593f019 | 30 | #include "util/evsel_config.h" |
2879ff36 | 31 | #include <regex.h> |
cd82a32e | 32 | |
c091ee90 IR |
33 | struct perf_pmu perf_pmu__fake = { |
34 | .name = "fake", | |
35 | }; | |
e46fc8d9 | 36 | |
c3245d20 IR |
37 | #define UNIT_MAX_LEN 31 /* max length for event unit name */ |
38 | ||
d9c5f5f9 IR |
39 | enum event_source { |
40 | /* An event loaded from /sys/devices/<pmu>/events. */ | |
41 | EVENT_SRC_SYSFS, | |
42 | /* An event loaded from a CPUID matched json file. */ | |
43 | EVENT_SRC_CPU_JSON, | |
44 | /* | |
45 | * An event loaded from a /sys/devices/<pmu>/identifier matched json | |
46 | * file. | |
47 | */ | |
48 | EVENT_SRC_SYS_JSON, | |
49 | }; | |
50 | ||
c3245d20 IR |
51 | /** |
52 | * struct perf_pmu_alias - An event either read from sysfs or builtin in | |
53 | * pmu-events.c, created by parsing the pmu-events json files. | |
54 | */ | |
55 | struct perf_pmu_alias { | |
56 | /** @name: Name of the event like "mem-loads". */ | |
57 | char *name; | |
58 | /** @desc: Optional short description of the event. */ | |
59 | char *desc; | |
60 | /** @long_desc: Optional long description. */ | |
61 | char *long_desc; | |
62 | /** | |
63 | * @topic: Optional topic such as cache or pipeline, particularly for | |
64 | * json events. | |
65 | */ | |
66 | char *topic; | |
c3245d20 | 67 | /** @terms: Owned list of the original parsed parameters. */ |
0d3f0e6f | 68 | struct parse_events_terms terms; |
c3245d20 IR |
69 | /** @list: List element of struct perf_pmu aliases. */ |
70 | struct list_head list; | |
7b723dbb IR |
71 | /** |
72 | * @pmu_name: The name copied from the json struct pmu_event. This can | |
73 | * differ from the PMU name as it won't have suffixes. | |
74 | */ | |
75 | char *pmu_name; | |
c3245d20 IR |
76 | /** @unit: Units for the event, such as bytes or cache lines. */ |
77 | char unit[UNIT_MAX_LEN+1]; | |
78 | /** @scale: Value to scale read counter values by. */ | |
79 | double scale; | |
80 | /** | |
81 | * @per_pkg: Does the file | |
82 | * <sysfs>/bus/event_source/devices/<pmu_name>/events/<name>.per-pkg or | |
83 | * equivalent json value exist and have the value 1. | |
84 | */ | |
85 | bool per_pkg; | |
86 | /** | |
87 | * @snapshot: Does the file | |
88 | * <sysfs>/bus/event_source/devices/<pmu_name>/events/<name>.snapshot | |
89 | * exist and have the value 1. | |
90 | */ | |
91 | bool snapshot; | |
92 | /** | |
93 | * @deprecated: Is the event hidden and so not shown in perf list by | |
94 | * default. | |
95 | */ | |
96 | bool deprecated; | |
7b723dbb IR |
97 | /** @from_sysfs: Was the alias from sysfs or a json event? */ |
98 | bool from_sysfs; | |
99 | /** @info_loaded: Have the scale, unit and other values been read from disk? */ | |
100 | bool info_loaded; | |
c3245d20 IR |
101 | }; |
102 | ||
fe13d43d IR |
103 | /** |
104 | * struct perf_pmu_format - Values from a format file read from | |
105 | * <sysfs>/devices/cpu/format/ held in struct perf_pmu. | |
106 | * | |
107 | * For example, the contents of <sysfs>/devices/cpu/format/event may be | |
108 | * "config:0-7" and will be represented here as name="event", | |
109 | * value=PERF_PMU_FORMAT_VALUE_CONFIG and bits 0 to 7 will be set. | |
110 | */ | |
ab1bf653 | 111 | struct perf_pmu_format { |
50402641 IR |
112 | /** @list: Element on list within struct perf_pmu. */ |
113 | struct list_head list; | |
114 | /** @bits: Which config bits are set by this format value. */ | |
115 | DECLARE_BITMAP(bits, PERF_PMU_FORMAT_BITS); | |
fe13d43d | 116 | /** @name: The modifier/file name. */ |
ab1bf653 | 117 | char *name; |
fe13d43d IR |
118 | /** |
119 | * @value : Which config value the format relates to. Supported values | |
120 | * are from PERF_PMU_FORMAT_VALUE_CONFIG to | |
121 | * PERF_PMU_FORMAT_VALUE_CONFIG_END. | |
122 | */ | |
50402641 IR |
123 | u16 value; |
124 | /** @loaded: Has the contents been loaded/parsed. */ | |
125 | bool loaded; | |
ab1bf653 ACM |
126 | }; |
127 | ||
8d4b6d37 IR |
128 | static int pmu_aliases_parse(struct perf_pmu *pmu); |
129 | ||
50402641 IR |
130 | static struct perf_pmu_format *perf_pmu__new_format(struct list_head *list, char *name) |
131 | { | |
132 | struct perf_pmu_format *format; | |
133 | ||
134 | format = zalloc(sizeof(*format)); | |
135 | if (!format) | |
136 | return NULL; | |
137 | ||
138 | format->name = strdup(name); | |
139 | if (!format->name) { | |
140 | free(format); | |
141 | return NULL; | |
142 | } | |
143 | list_add_tail(&format->list, list); | |
144 | return format; | |
145 | } | |
146 | ||
147 | /* Called at the end of parsing a format. */ | |
148 | void perf_pmu_format__set_value(void *vformat, int config, unsigned long *bits) | |
149 | { | |
150 | struct perf_pmu_format *format = vformat; | |
151 | ||
152 | format->value = config; | |
153 | memcpy(format->bits, bits, sizeof(format->bits)); | |
154 | } | |
155 | ||
156 | static void __perf_pmu_format__load(struct perf_pmu_format *format, FILE *file) | |
157 | { | |
158 | void *scanner; | |
159 | int ret; | |
160 | ||
161 | ret = perf_pmu_lex_init(&scanner); | |
162 | if (ret) | |
163 | return; | |
164 | ||
165 | perf_pmu_set_in(file, scanner); | |
166 | ret = perf_pmu_parse(format, scanner); | |
167 | perf_pmu_lex_destroy(scanner); | |
168 | format->loaded = true; | |
169 | } | |
170 | ||
63883cb0 | 171 | static void perf_pmu_format__load(const struct perf_pmu *pmu, struct perf_pmu_format *format) |
50402641 IR |
172 | { |
173 | char path[PATH_MAX]; | |
174 | FILE *file = NULL; | |
175 | ||
176 | if (format->loaded) | |
177 | return; | |
178 | ||
179 | if (!perf_pmu__pathname_scnprintf(path, sizeof(path), pmu->name, "format")) | |
180 | return; | |
181 | ||
182 | assert(strlen(path) + strlen(format->name) + 2 < sizeof(path)); | |
183 | strcat(path, "/"); | |
184 | strcat(path, format->name); | |
185 | ||
186 | file = fopen(path, "r"); | |
187 | if (!file) | |
188 | return; | |
189 | __perf_pmu_format__load(format, file); | |
190 | fclose(file); | |
191 | } | |
192 | ||
cd82a32e JO |
193 | /* |
194 | * Parse & process all the sysfs attributes located under | |
195 | * the directory specified in 'dir' parameter. | |
196 | */ | |
aa1551f2 | 197 | static int perf_pmu__format_parse(struct perf_pmu *pmu, int dirfd, bool eager_load) |
cd82a32e JO |
198 | { |
199 | struct dirent *evt_ent; | |
200 | DIR *format_dir; | |
201 | int ret = 0; | |
202 | ||
e293a5e8 | 203 | format_dir = fdopendir(dirfd); |
cd82a32e JO |
204 | if (!format_dir) |
205 | return -EINVAL; | |
206 | ||
50402641 IR |
207 | while ((evt_ent = readdir(format_dir)) != NULL) { |
208 | struct perf_pmu_format *format; | |
cd82a32e | 209 | char *name = evt_ent->d_name; |
cd82a32e JO |
210 | |
211 | if (!strcmp(name, ".") || !strcmp(name, "..")) | |
212 | continue; | |
213 | ||
50402641 IR |
214 | format = perf_pmu__new_format(&pmu->format, name); |
215 | if (!format) { | |
216 | ret = -ENOMEM; | |
3d88aec0 IR |
217 | break; |
218 | } | |
219 | ||
50402641 IR |
220 | if (eager_load) { |
221 | FILE *file; | |
222 | int fd = openat(dirfd, name, O_RDONLY); | |
223 | ||
224 | if (fd < 0) { | |
225 | ret = -errno; | |
226 | break; | |
227 | } | |
228 | file = fdopen(fd, "r"); | |
229 | if (!file) { | |
230 | close(fd); | |
231 | break; | |
232 | } | |
233 | __perf_pmu_format__load(format, file); | |
3d88aec0 | 234 | fclose(file); |
3d88aec0 | 235 | } |
cd82a32e JO |
236 | } |
237 | ||
238 | closedir(format_dir); | |
239 | return ret; | |
240 | } | |
241 | ||
242 | /* | |
243 | * Reading/parsing the default pmu format definition, which should be | |
244 | * located at: | |
245 | * /sys/bus/event_source/devices/<dev>/format as sysfs group attributes. | |
246 | */ | |
aa1551f2 | 247 | static int pmu_format(struct perf_pmu *pmu, int dirfd, const char *name, bool eager_load) |
cd82a32e | 248 | { |
e293a5e8 | 249 | int fd; |
cd82a32e | 250 | |
e293a5e8 NK |
251 | fd = perf_pmu__pathname_fd(dirfd, name, "format", O_DIRECTORY); |
252 | if (fd < 0) | |
d9664582 | 253 | return 0; |
cd82a32e | 254 | |
e293a5e8 | 255 | /* it'll close the fd */ |
aa1551f2 | 256 | if (perf_pmu__format_parse(pmu, fd, eager_load)) |
cd82a32e JO |
257 | return -1; |
258 | ||
259 | return 0; | |
260 | } | |
261 | ||
a55ab7c4 | 262 | int perf_pmu__convert_scale(const char *scale, char **end, double *sval) |
410136f5 | 263 | { |
ea8f75f9 | 264 | char *lc; |
d02fc6bc | 265 | int ret = 0; |
9ecae065 | 266 | |
410136f5 SE |
267 | /* |
268 | * save current locale | |
269 | */ | |
270 | lc = setlocale(LC_NUMERIC, NULL); | |
271 | ||
f9a5978a JO |
272 | /* |
273 | * The lc string may be allocated in static storage, | |
274 | * so get a dynamic copy to make it survive setlocale | |
275 | * call below. | |
276 | */ | |
277 | lc = strdup(lc); | |
278 | if (!lc) { | |
279 | ret = -ENOMEM; | |
d02fc6bc | 280 | goto out; |
f9a5978a JO |
281 | } |
282 | ||
410136f5 SE |
283 | /* |
284 | * force to C locale to ensure kernel | |
285 | * scale string is converted correctly. | |
286 | * kernel uses default C locale. | |
287 | */ | |
288 | setlocale(LC_NUMERIC, "C"); | |
289 | ||
d02fc6bc | 290 | *sval = strtod(scale, end); |
410136f5 | 291 | |
d02fc6bc | 292 | out: |
410136f5 SE |
293 | /* restore locale */ |
294 | setlocale(LC_NUMERIC, lc); | |
ea8f75f9 | 295 | free(lc); |
d02fc6bc AK |
296 | return ret; |
297 | } | |
298 | ||
7b723dbb | 299 | static int perf_pmu__parse_scale(struct perf_pmu *pmu, struct perf_pmu_alias *alias) |
d02fc6bc AK |
300 | { |
301 | struct stat st; | |
302 | ssize_t sret; | |
7b723dbb | 303 | size_t len; |
d02fc6bc AK |
304 | char scale[128]; |
305 | int fd, ret = -1; | |
306 | char path[PATH_MAX]; | |
307 | ||
7b723dbb IR |
308 | len = perf_pmu__event_source_devices_scnprintf(path, sizeof(path)); |
309 | if (!len) | |
310 | return 0; | |
48a3adcf | 311 | scnprintf(path + len, sizeof(path) - len, "%s/events/%s.scale", pmu->name, alias->name); |
d02fc6bc | 312 | |
7b723dbb | 313 | fd = open(path, O_RDONLY); |
d02fc6bc AK |
314 | if (fd == -1) |
315 | return -1; | |
316 | ||
317 | if (fstat(fd, &st) < 0) | |
318 | goto error; | |
319 | ||
320 | sret = read(fd, scale, sizeof(scale)-1); | |
321 | if (sret < 0) | |
322 | goto error; | |
323 | ||
324 | if (scale[sret - 1] == '\n') | |
325 | scale[sret - 1] = '\0'; | |
326 | else | |
327 | scale[sret] = '\0'; | |
f9a5978a | 328 | |
a55ab7c4 | 329 | ret = perf_pmu__convert_scale(scale, NULL, &alias->scale); |
410136f5 SE |
330 | error: |
331 | close(fd); | |
332 | return ret; | |
333 | } | |
334 | ||
7b723dbb | 335 | static int perf_pmu__parse_unit(struct perf_pmu *pmu, struct perf_pmu_alias *alias) |
410136f5 SE |
336 | { |
337 | char path[PATH_MAX]; | |
7b723dbb | 338 | size_t len; |
410136f5 SE |
339 | ssize_t sret; |
340 | int fd; | |
341 | ||
410136f5 | 342 | |
7b723dbb IR |
343 | len = perf_pmu__event_source_devices_scnprintf(path, sizeof(path)); |
344 | if (!len) | |
345 | return 0; | |
48a3adcf | 346 | scnprintf(path + len, sizeof(path) - len, "%s/events/%s.unit", pmu->name, alias->name); |
7b723dbb IR |
347 | |
348 | fd = open(path, O_RDONLY); | |
410136f5 SE |
349 | if (fd == -1) |
350 | return -1; | |
351 | ||
d85ce830 | 352 | sret = read(fd, alias->unit, UNIT_MAX_LEN); |
410136f5 SE |
353 | if (sret < 0) |
354 | goto error; | |
355 | ||
356 | close(fd); | |
357 | ||
9ecae065 MS |
358 | if (alias->unit[sret - 1] == '\n') |
359 | alias->unit[sret - 1] = '\0'; | |
360 | else | |
361 | alias->unit[sret] = '\0'; | |
410136f5 SE |
362 | |
363 | return 0; | |
364 | error: | |
365 | close(fd); | |
366 | alias->unit[0] = '\0'; | |
367 | return -1; | |
368 | } | |
369 | ||
044330c1 | 370 | static int |
7b723dbb | 371 | perf_pmu__parse_per_pkg(struct perf_pmu *pmu, struct perf_pmu_alias *alias) |
044330c1 MF |
372 | { |
373 | char path[PATH_MAX]; | |
7b723dbb | 374 | size_t len; |
044330c1 MF |
375 | int fd; |
376 | ||
7b723dbb IR |
377 | len = perf_pmu__event_source_devices_scnprintf(path, sizeof(path)); |
378 | if (!len) | |
379 | return 0; | |
48a3adcf | 380 | scnprintf(path + len, sizeof(path) - len, "%s/events/%s.per-pkg", pmu->name, alias->name); |
044330c1 | 381 | |
7b723dbb | 382 | fd = open(path, O_RDONLY); |
044330c1 MF |
383 | if (fd == -1) |
384 | return -1; | |
385 | ||
386 | close(fd); | |
387 | ||
388 | alias->per_pkg = true; | |
389 | return 0; | |
390 | } | |
391 | ||
7b723dbb | 392 | static int perf_pmu__parse_snapshot(struct perf_pmu *pmu, struct perf_pmu_alias *alias) |
1d9e446b JO |
393 | { |
394 | char path[PATH_MAX]; | |
7b723dbb | 395 | size_t len; |
1d9e446b JO |
396 | int fd; |
397 | ||
7b723dbb IR |
398 | len = perf_pmu__event_source_devices_scnprintf(path, sizeof(path)); |
399 | if (!len) | |
400 | return 0; | |
48a3adcf | 401 | scnprintf(path + len, sizeof(path) - len, "%s/events/%s.snapshot", pmu->name, alias->name); |
1d9e446b | 402 | |
7b723dbb | 403 | fd = open(path, O_RDONLY); |
1d9e446b JO |
404 | if (fd == -1) |
405 | return -1; | |
406 | ||
407 | alias->snapshot = true; | |
408 | close(fd); | |
409 | return 0; | |
410 | } | |
411 | ||
6dde6429 | 412 | /* Delete an alias entry. */ |
c3245d20 | 413 | static void perf_pmu_free_alias(struct perf_pmu_alias *newalias) |
6dde6429 TR |
414 | { |
415 | zfree(&newalias->name); | |
416 | zfree(&newalias->desc); | |
417 | zfree(&newalias->long_desc); | |
418 | zfree(&newalias->topic); | |
32705de7 | 419 | zfree(&newalias->pmu_name); |
0d3f0e6f | 420 | parse_events_terms__exit(&newalias->terms); |
6dde6429 TR |
421 | free(newalias); |
422 | } | |
423 | ||
eec11310 NK |
424 | static void perf_pmu__del_aliases(struct perf_pmu *pmu) |
425 | { | |
426 | struct perf_pmu_alias *alias, *tmp; | |
427 | ||
428 | list_for_each_entry_safe(alias, tmp, &pmu->aliases, list) { | |
429 | list_del(&alias->list); | |
430 | perf_pmu_free_alias(alias); | |
431 | } | |
432 | } | |
433 | ||
8d4b6d37 IR |
434 | static struct perf_pmu_alias *perf_pmu__find_alias(struct perf_pmu *pmu, |
435 | const char *name, | |
436 | bool load) | |
6dde6429 | 437 | { |
f63a536f | 438 | struct perf_pmu_alias *alias; |
6dde6429 | 439 | |
7b6dd7a9 IR |
440 | if (load && !pmu->sysfs_aliases_loaded) { |
441 | bool has_sysfs_event; | |
442 | char event_file_name[FILENAME_MAX + 8]; | |
8d4b6d37 | 443 | |
7b6dd7a9 IR |
444 | /* |
445 | * Test if alias/event 'name' exists in the PMU's sysfs/events | |
446 | * directory. If not skip parsing the sysfs aliases. Sysfs event | |
447 | * name must be all lower or all upper case. | |
448 | */ | |
449 | scnprintf(event_file_name, sizeof(event_file_name), "events/%s", name); | |
450 | for (size_t i = 7, n = 7 + strlen(name); i < n; i++) | |
451 | event_file_name[i] = tolower(event_file_name[i]); | |
452 | ||
453 | has_sysfs_event = perf_pmu__file_exists(pmu, event_file_name); | |
454 | if (!has_sysfs_event) { | |
455 | for (size_t i = 7, n = 7 + strlen(name); i < n; i++) | |
456 | event_file_name[i] = toupper(event_file_name[i]); | |
457 | ||
458 | has_sysfs_event = perf_pmu__file_exists(pmu, event_file_name); | |
459 | } | |
460 | if (has_sysfs_event) | |
461 | pmu_aliases_parse(pmu); | |
462 | ||
463 | } | |
f63a536f IR |
464 | list_for_each_entry(alias, &pmu->aliases, list) { |
465 | if (!strcasecmp(alias->name, name)) | |
466 | return alias; | |
6dde6429 | 467 | } |
f63a536f IR |
468 | return NULL; |
469 | } | |
470 | ||
471 | static bool assign_str(const char *name, const char *field, char **old_str, | |
472 | const char *new_str) | |
473 | { | |
474 | if (!*old_str && new_str) { | |
475 | *old_str = strdup(new_str); | |
476 | return true; | |
477 | } | |
478 | ||
479 | if (!new_str || !strcasecmp(*old_str, new_str)) | |
480 | return false; /* Nothing to update. */ | |
481 | ||
482 | pr_debug("alias %s differs in field '%s' ('%s' != '%s')\n", | |
483 | name, field, *old_str, new_str); | |
484 | zfree(old_str); | |
485 | *old_str = strdup(new_str); | |
486 | return true; | |
487 | } | |
488 | ||
7b723dbb IR |
489 | static void read_alias_info(struct perf_pmu *pmu, struct perf_pmu_alias *alias) |
490 | { | |
491 | if (!alias->from_sysfs || alias->info_loaded) | |
492 | return; | |
493 | ||
494 | /* | |
495 | * load unit name and scale if available | |
496 | */ | |
497 | perf_pmu__parse_unit(pmu, alias); | |
498 | perf_pmu__parse_scale(pmu, alias); | |
499 | perf_pmu__parse_per_pkg(pmu, alias); | |
500 | perf_pmu__parse_snapshot(pmu, alias); | |
501 | } | |
502 | ||
503 | struct update_alias_data { | |
504 | struct perf_pmu *pmu; | |
505 | struct perf_pmu_alias *alias; | |
506 | }; | |
507 | ||
f63a536f IR |
508 | static int update_alias(const struct pmu_event *pe, |
509 | const struct pmu_events_table *table __maybe_unused, | |
510 | void *vdata) | |
511 | { | |
7b723dbb | 512 | struct update_alias_data *data = vdata; |
f63a536f IR |
513 | int ret = 0; |
514 | ||
7b723dbb IR |
515 | read_alias_info(data->pmu, data->alias); |
516 | assign_str(pe->name, "desc", &data->alias->desc, pe->desc); | |
517 | assign_str(pe->name, "long_desc", &data->alias->long_desc, pe->long_desc); | |
518 | assign_str(pe->name, "topic", &data->alias->topic, pe->topic); | |
519 | data->alias->per_pkg = pe->perpkg; | |
30f0b435 | 520 | if (pe->event) { |
0d3f0e6f | 521 | parse_events_terms__exit(&data->alias->terms); |
7b723dbb | 522 | ret = parse_events_terms(&data->alias->terms, pe->event, /*input=*/NULL); |
f63a536f IR |
523 | } |
524 | if (!ret && pe->unit) { | |
525 | char *unit; | |
526 | ||
7b723dbb | 527 | ret = perf_pmu__convert_scale(pe->unit, &unit, &data->alias->scale); |
f63a536f | 528 | if (!ret) |
7b723dbb | 529 | snprintf(data->alias->unit, sizeof(data->alias->unit), "%s", unit); |
f63a536f IR |
530 | } |
531 | return ret; | |
6dde6429 TR |
532 | } |
533 | ||
7b723dbb | 534 | static int perf_pmu__new_alias(struct perf_pmu *pmu, const char *name, |
edb217ff | 535 | const char *desc, const char *val, FILE *val_fd, |
d9c5f5f9 | 536 | const struct pmu_event *pe, enum event_source src) |
a6146d50 | 537 | { |
5c6ccc37 | 538 | struct perf_pmu_alias *alias; |
a6146d50 | 539 | int ret; |
330f40a0 | 540 | const char *long_desc = NULL, *topic = NULL, *unit = NULL, *pmu_name = NULL; |
bd680861 | 541 | bool deprecated = false, perpkg = false; |
eab35953 | 542 | |
8d4b6d37 | 543 | if (perf_pmu__find_alias(pmu, name, /*load=*/ false)) { |
f63a536f IR |
544 | /* Alias was already created/loaded. */ |
545 | return 0; | |
546 | } | |
547 | ||
eab35953 | 548 | if (pe) { |
330f40a0 IR |
549 | long_desc = pe->long_desc; |
550 | topic = pe->topic; | |
551 | unit = pe->unit; | |
bd680861 | 552 | perpkg = pe->perpkg; |
9ed8b7dc | 553 | deprecated = pe->deprecated; |
39aa4ff6 IR |
554 | if (pe->pmu && strcmp(pe->pmu, "default_core")) |
555 | pmu_name = pe->pmu; | |
eab35953 | 556 | } |
a6146d50 | 557 | |
eaaebb01 | 558 | alias = zalloc(sizeof(*alias)); |
a6146d50 ZY |
559 | if (!alias) |
560 | return -ENOMEM; | |
561 | ||
0d3f0e6f | 562 | parse_events_terms__init(&alias->terms); |
410136f5 SE |
563 | alias->scale = 1.0; |
564 | alias->unit[0] = '\0'; | |
bd680861 | 565 | alias->per_pkg = perpkg; |
84530920 | 566 | alias->snapshot = false; |
9ed8b7dc | 567 | alias->deprecated = deprecated; |
410136f5 | 568 | |
edb217ff | 569 | ret = parse_events_terms(&alias->terms, val, val_fd); |
a6146d50 | 570 | if (ret) { |
70c646e0 | 571 | pr_err("Cannot parse alias %s: %d\n", val, ret); |
a6146d50 ZY |
572 | free(alias); |
573 | return ret; | |
574 | } | |
575 | ||
576 | alias->name = strdup(name); | |
08e60ed1 | 577 | alias->desc = desc ? strdup(desc) : NULL; |
c8d6828a SB |
578 | alias->long_desc = long_desc ? strdup(long_desc) : |
579 | desc ? strdup(desc) : NULL; | |
dd5f1036 | 580 | alias->topic = topic ? strdup(topic) : NULL; |
f63a536f | 581 | alias->pmu_name = pmu_name ? strdup(pmu_name) : NULL; |
fedb2b51 | 582 | if (unit) { |
f63a536f IR |
583 | if (perf_pmu__convert_scale(unit, (char **)&unit, &alias->scale) < 0) { |
584 | perf_pmu_free_alias(alias); | |
fedb2b51 | 585 | return -1; |
f63a536f | 586 | } |
fedb2b51 AK |
587 | snprintf(alias->unit, sizeof(alias->unit), "%s", unit); |
588 | } | |
d9c5f5f9 IR |
589 | switch (src) { |
590 | default: | |
591 | case EVENT_SRC_SYSFS: | |
7b723dbb | 592 | alias->from_sysfs = true; |
7c52f10c | 593 | if (pmu->events_table) { |
d9c5f5f9 IR |
594 | /* Update an event from sysfs with json data. */ |
595 | struct update_alias_data data = { | |
596 | .pmu = pmu, | |
597 | .alias = alias, | |
598 | }; | |
e6ff1eed | 599 | if (pmu_events_table__find_event(pmu->events_table, pmu, name, |
7b723dbb | 600 | update_alias, &data) == 0) |
d9c5f5f9 | 601 | pmu->cpu_json_aliases++; |
7c52f10c | 602 | } |
e6ff1eed | 603 | pmu->sysfs_aliases++; |
d9c5f5f9 IR |
604 | break; |
605 | case EVENT_SRC_CPU_JSON: | |
606 | pmu->cpu_json_aliases++; | |
607 | break; | |
608 | case EVENT_SRC_SYS_JSON: | |
609 | pmu->sys_json_aliases++; | |
610 | break; | |
611 | ||
612 | } | |
f63a536f | 613 | list_add_tail(&alias->list, &pmu->aliases); |
a6146d50 ZY |
614 | return 0; |
615 | } | |
616 | ||
3a42f4c7 | 617 | static inline bool pmu_alias_info_file(const char *name) |
46441bdc MF |
618 | { |
619 | size_t len; | |
620 | ||
621 | len = strlen(name); | |
622 | if (len > 5 && !strcmp(name + len - 5, ".unit")) | |
623 | return true; | |
624 | if (len > 6 && !strcmp(name + len - 6, ".scale")) | |
625 | return true; | |
044330c1 MF |
626 | if (len > 8 && !strcmp(name + len - 8, ".per-pkg")) |
627 | return true; | |
1d9e446b JO |
628 | if (len > 9 && !strcmp(name + len - 9, ".snapshot")) |
629 | return true; | |
46441bdc MF |
630 | |
631 | return false; | |
632 | } | |
633 | ||
a6146d50 | 634 | /* |
8d4b6d37 IR |
635 | * Reading the pmu event aliases definition, which should be located at: |
636 | * /sys/bus/event_source/devices/<dev>/events as sysfs group attributes. | |
a6146d50 | 637 | */ |
18eb2ca8 | 638 | static int __pmu_aliases_parse(struct perf_pmu *pmu, int events_dir_fd) |
a6146d50 ZY |
639 | { |
640 | struct dirent *evt_ent; | |
641 | DIR *event_dir; | |
8d4b6d37 | 642 | |
18eb2ca8 IR |
643 | event_dir = fdopendir(events_dir_fd); |
644 | if (!event_dir) | |
a6146d50 ZY |
645 | return -EINVAL; |
646 | ||
940db6dc | 647 | while ((evt_ent = readdir(event_dir))) { |
a6146d50 | 648 | char *name = evt_ent->d_name; |
18eb2ca8 | 649 | int fd; |
a6146d50 ZY |
650 | FILE *file; |
651 | ||
652 | if (!strcmp(name, ".") || !strcmp(name, "..")) | |
653 | continue; | |
654 | ||
410136f5 | 655 | /* |
46441bdc | 656 | * skip info files parsed in perf_pmu__new_alias() |
410136f5 | 657 | */ |
46441bdc | 658 | if (pmu_alias_info_file(name)) |
410136f5 SE |
659 | continue; |
660 | ||
18eb2ca8 | 661 | fd = openat(events_dir_fd, name, O_RDONLY); |
0ea8920e IR |
662 | if (fd == -1) { |
663 | pr_debug("Cannot open %s\n", name); | |
664 | continue; | |
665 | } | |
e293a5e8 | 666 | file = fdopen(fd, "r"); |
940db6dc | 667 | if (!file) { |
0ea8920e | 668 | close(fd); |
940db6dc AK |
669 | continue; |
670 | } | |
410136f5 | 671 | |
7b723dbb | 672 | if (perf_pmu__new_alias(pmu, name, /*desc=*/ NULL, |
d9c5f5f9 IR |
673 | /*val=*/ NULL, file, /*pe=*/ NULL, |
674 | EVENT_SRC_SYSFS) < 0) | |
940db6dc | 675 | pr_debug("Cannot set up %s\n", name); |
a6146d50 ZY |
676 | fclose(file); |
677 | } | |
678 | ||
679 | closedir(event_dir); | |
8d4b6d37 | 680 | pmu->sysfs_aliases_loaded = true; |
a6146d50 ZY |
681 | return 0; |
682 | } | |
683 | ||
18eb2ca8 IR |
684 | static int pmu_aliases_parse(struct perf_pmu *pmu) |
685 | { | |
686 | char path[PATH_MAX]; | |
687 | size_t len; | |
688 | int events_dir_fd, ret; | |
689 | ||
690 | if (pmu->sysfs_aliases_loaded) | |
691 | return 0; | |
692 | ||
693 | len = perf_pmu__event_source_devices_scnprintf(path, sizeof(path)); | |
694 | if (!len) | |
695 | return 0; | |
696 | scnprintf(path + len, sizeof(path) - len, "%s/events", pmu->name); | |
697 | ||
698 | events_dir_fd = open(path, O_DIRECTORY); | |
699 | if (events_dir_fd == -1) { | |
700 | pmu->sysfs_aliases_loaded = true; | |
701 | return 0; | |
702 | } | |
703 | ret = __pmu_aliases_parse(pmu, events_dir_fd); | |
704 | close(events_dir_fd); | |
705 | return ret; | |
706 | } | |
707 | ||
708 | static int pmu_aliases_parse_eager(struct perf_pmu *pmu, int sysfs_fd) | |
709 | { | |
710 | char path[FILENAME_MAX + 7]; | |
711 | int ret, events_dir_fd; | |
712 | ||
713 | scnprintf(path, sizeof(path), "%s/events", pmu->name); | |
714 | events_dir_fd = openat(sysfs_fd, path, O_DIRECTORY, 0); | |
715 | if (events_dir_fd == -1) { | |
716 | pmu->sysfs_aliases_loaded = true; | |
717 | return 0; | |
718 | } | |
719 | ret = __pmu_aliases_parse(pmu, events_dir_fd); | |
720 | close(events_dir_fd); | |
721 | return ret; | |
722 | } | |
723 | ||
f5144eca | 724 | static int pmu_alias_terms(struct perf_pmu_alias *alias, int err_loc, struct list_head *terms) |
a6146d50 | 725 | { |
7c2f8164 | 726 | struct parse_events_term *term, *cloned; |
0d3f0e6f IR |
727 | struct parse_events_terms clone_terms; |
728 | ||
729 | parse_events_terms__init(&clone_terms); | |
730 | list_for_each_entry(term, &alias->terms.terms, list) { | |
731 | int ret = parse_events_term__clone(&cloned, term); | |
a6146d50 | 732 | |
a6146d50 | 733 | if (ret) { |
0d3f0e6f | 734 | parse_events_terms__exit(&clone_terms); |
a6146d50 ZY |
735 | return ret; |
736 | } | |
c2f1cead AK |
737 | /* |
738 | * Weak terms don't override command line options, | |
739 | * which we don't want for implicit terms in aliases. | |
740 | */ | |
741 | cloned->weak = true; | |
f5144eca | 742 | cloned->err_term = cloned->err_val = err_loc; |
0d3f0e6f | 743 | list_add_tail(&cloned->list, &clone_terms.terms); |
a6146d50 | 744 | } |
0d3f0e6f IR |
745 | list_splice_init(&clone_terms.terms, terms); |
746 | parse_events_terms__exit(&clone_terms); | |
a6146d50 ZY |
747 | return 0; |
748 | } | |
749 | ||
66ec1191 MR |
750 | /* |
751 | * Uncore PMUs have a "cpumask" file under sysfs. CPU PMUs (e.g. on arm/arm64) | |
752 | * may have a "cpus" file. | |
753 | */ | |
d06593aa | 754 | static struct perf_cpu_map *pmu_cpumask(int dirfd, const char *name, bool is_core) |
7ae92e74 | 755 | { |
f854839b | 756 | struct perf_cpu_map *cpus; |
7e3fcffe | 757 | const char *templates[] = { |
d50a79cd JC |
758 | "cpumask", |
759 | "cpus", | |
66ec1191 | 760 | NULL |
7e3fcffe MR |
761 | }; |
762 | const char **template; | |
d50a79cd JC |
763 | char pmu_name[PATH_MAX]; |
764 | struct perf_pmu pmu = {.name = pmu_name}; | |
765 | FILE *file; | |
7ae92e74 | 766 | |
d50a79cd | 767 | strlcpy(pmu_name, name, sizeof(pmu_name)); |
7e3fcffe | 768 | for (template = templates; *template; template++) { |
3a69672e | 769 | file = perf_pmu__open_file_at(&pmu, dirfd, *template); |
d50a79cd JC |
770 | if (!file) |
771 | continue; | |
772 | cpus = perf_cpu_map__read(file); | |
3a69672e | 773 | fclose(file); |
66ec1191 MR |
774 | if (cpus) |
775 | return cpus; | |
7e3fcffe | 776 | } |
7ae92e74 | 777 | |
d06593aa IR |
778 | /* Nothing found, for core PMUs assume this means all CPUs. */ |
779 | return is_core ? perf_cpu_map__get(cpu_map__online()) : NULL; | |
66ec1191 | 780 | } |
7ae92e74 | 781 | |
3a69672e | 782 | static bool pmu_is_uncore(int dirfd, const char *name) |
66ec1191 | 783 | { |
3a69672e | 784 | int fd; |
7ae92e74 | 785 | |
3a69672e NK |
786 | fd = perf_pmu__pathname_fd(dirfd, name, "cpumask", O_PATH); |
787 | if (fd < 0) | |
788 | return false; | |
789 | ||
790 | close(fd); | |
791 | return true; | |
7ae92e74 YZ |
792 | } |
793 | ||
51d54847 JG |
794 | static char *pmu_id(const char *name) |
795 | { | |
796 | char path[PATH_MAX], *str; | |
797 | size_t len; | |
798 | ||
5f2c8efa | 799 | perf_pmu__pathname_scnprintf(path, sizeof(path), name, "identifier"); |
51d54847 | 800 | |
5f2c8efa | 801 | if (filename__read_str(path, &str, &len) < 0) |
51d54847 JG |
802 | return NULL; |
803 | ||
804 | str[len - 1] = 0; /* remove line feed */ | |
805 | ||
806 | return str; | |
807 | } | |
808 | ||
4bf7e81a IR |
809 | /** |
810 | * is_sysfs_pmu_core() - PMU CORE devices have different name other than cpu in | |
811 | * sysfs on some platforms like ARM or Intel hybrid. Looking for | |
812 | * possible the cpus file in sysfs files to identify whether this is a | |
813 | * core device. | |
814 | * @name: The PMU name such as "cpu_atom". | |
14b22ae0 | 815 | */ |
4bf7e81a | 816 | static int is_sysfs_pmu_core(const char *name) |
14b22ae0 | 817 | { |
14b22ae0 | 818 | char path[PATH_MAX]; |
14b22ae0 | 819 | |
f8ad6018 | 820 | if (!perf_pmu__pathname_scnprintf(path, sizeof(path), name, "cpus")) |
14b22ae0 | 821 | return 0; |
d9664582 | 822 | return file_available(path); |
14b22ae0 GK |
823 | } |
824 | ||
29be2fe0 | 825 | char *perf_pmu__getcpuid(struct perf_pmu *pmu) |
933f82ff | 826 | { |
933f82ff | 827 | char *cpuid; |
fb967063 | 828 | static bool printed; |
933f82ff | 829 | |
fc06e2a5 AK |
830 | cpuid = getenv("PERF_CPUID"); |
831 | if (cpuid) | |
832 | cpuid = strdup(cpuid); | |
833 | if (!cpuid) | |
54e32dc0 | 834 | cpuid = get_cpuid_str(pmu); |
933f82ff | 835 | if (!cpuid) |
d77ade9f | 836 | return NULL; |
933f82ff | 837 | |
fb967063 AK |
838 | if (!printed) { |
839 | pr_debug("Using CPUID %s\n", cpuid); | |
840 | printed = true; | |
841 | } | |
d77ade9f AK |
842 | return cpuid; |
843 | } | |
844 | ||
f8ea2c15 IR |
845 | __weak const struct pmu_metrics_table *pmu_metrics_table__find(void) |
846 | { | |
847 | return perf_pmu__find_metrics_table(NULL); | |
848 | } | |
849 | ||
7afbf90e JC |
850 | /** |
851 | * Return the length of the PMU name not including the suffix for uncore PMUs. | |
852 | * | |
853 | * We want to deduplicate many similar uncore PMUs by stripping their suffixes, | |
854 | * but there are never going to be too many core PMUs and the suffixes might be | |
855 | * interesting. "arm_cortex_a53" vs "arm_cortex_a57" or "cpum_cf" for example. | |
856 | * | |
857 | * @skip_duplicate_pmus: False in verbose mode so all uncore PMUs are visible | |
858 | */ | |
859 | static size_t pmu_deduped_name_len(const struct perf_pmu *pmu, const char *name, | |
860 | bool skip_duplicate_pmus) | |
861 | { | |
862 | return skip_duplicate_pmus && !pmu->is_core | |
863 | ? pmu_name_len_no_suffix(name) | |
864 | : strlen(name); | |
865 | } | |
866 | ||
240e6fd0 IR |
867 | /** |
868 | * perf_pmu__match_ignoring_suffix - Does the pmu_name match tok ignoring any | |
869 | * trailing suffix? The Suffix must be in form | |
870 | * tok_{digits}, or tok{digits}. | |
871 | * @pmu_name: The pmu_name with possible suffix. | |
872 | * @tok: The possible match to pmu_name without suffix. | |
c07d5c92 | 873 | */ |
240e6fd0 | 874 | static bool perf_pmu__match_ignoring_suffix(const char *pmu_name, const char *tok) |
c47a5599 | 875 | { |
3241d46f IR |
876 | const char *p, *suffix; |
877 | bool has_hex = false; | |
c47a5599 JY |
878 | |
879 | if (strncmp(pmu_name, tok, strlen(tok))) | |
880 | return false; | |
881 | ||
3241d46f | 882 | suffix = p = pmu_name + strlen(tok); |
c47a5599 JY |
883 | if (*p == 0) |
884 | return true; | |
885 | ||
3241d46f | 886 | if (*p == '_') { |
c07d5c92 | 887 | ++p; |
3241d46f IR |
888 | ++suffix; |
889 | } | |
c47a5599 | 890 | |
c07d5c92 JG |
891 | /* Ensure we end in a number */ |
892 | while (1) { | |
3241d46f | 893 | if (!isxdigit(*p)) |
c07d5c92 | 894 | return false; |
3241d46f IR |
895 | if (!has_hex) |
896 | has_hex = !isdigit(*p); | |
c07d5c92 JG |
897 | if (*(++p) == 0) |
898 | break; | |
899 | } | |
c47a5599 | 900 | |
3241d46f IR |
901 | if (has_hex) |
902 | return (p - suffix) > 2; | |
903 | ||
c47a5599 JY |
904 | return true; |
905 | } | |
906 | ||
240e6fd0 IR |
907 | /** |
908 | * pmu_uncore_alias_match - does name match the PMU name? | |
909 | * @pmu_name: the json struct pmu_event name. This may lack a suffix (which | |
910 | * matches) or be of the form "socket,pmuname" which will match | |
911 | * "socketX_pmunameY". | |
912 | * @name: a real full PMU name as from sysfs. | |
913 | */ | |
914 | static bool pmu_uncore_alias_match(const char *pmu_name, const char *name) | |
730670b1 JG |
915 | { |
916 | char *tmp = NULL, *tok, *str; | |
917 | bool res; | |
918 | ||
240e6fd0 IR |
919 | if (strchr(pmu_name, ',') == NULL) |
920 | return perf_pmu__match_ignoring_suffix(name, pmu_name); | |
921 | ||
730670b1 JG |
922 | str = strdup(pmu_name); |
923 | if (!str) | |
924 | return false; | |
925 | ||
926 | /* | |
927 | * uncore alias may be from different PMU with common prefix | |
928 | */ | |
929 | tok = strtok_r(str, ",", &tmp); | |
930 | if (strncmp(pmu_name, tok, strlen(tok))) { | |
931 | res = false; | |
932 | goto out; | |
933 | } | |
934 | ||
935 | /* | |
936 | * Match more complex aliases where the alias name is a comma-delimited | |
937 | * list of tokens, orderly contained in the matching PMU name. | |
938 | * | |
939 | * Example: For alias "socket,pmuname" and PMU "socketX_pmunameY", we | |
940 | * match "socket" in "socketX_pmunameY" and then "pmuname" in | |
941 | * "pmunameY". | |
942 | */ | |
c07d5c92 JG |
943 | while (1) { |
944 | char *next_tok = strtok_r(NULL, ",", &tmp); | |
945 | ||
730670b1 | 946 | name = strstr(name, tok); |
c07d5c92 | 947 | if (!name || |
240e6fd0 | 948 | (!next_tok && !perf_pmu__match_ignoring_suffix(name, tok))) { |
730670b1 JG |
949 | res = false; |
950 | goto out; | |
951 | } | |
c07d5c92 JG |
952 | if (!next_tok) |
953 | break; | |
954 | tok = next_tok; | |
955 | name += strlen(tok); | |
730670b1 JG |
956 | } |
957 | ||
958 | res = true; | |
959 | out: | |
960 | free(str); | |
961 | return res; | |
962 | } | |
963 | ||
2879ff36 JZ |
964 | bool pmu_uncore_identifier_match(const char *compat, const char *id) |
965 | { | |
966 | regex_t re; | |
967 | regmatch_t pmatch[1]; | |
968 | int match; | |
969 | ||
970 | if (regcomp(&re, compat, REG_EXTENDED) != 0) { | |
971 | /* Warn unable to generate match particular string. */ | |
972 | pr_info("Invalid regular expression %s\n", compat); | |
973 | return false; | |
974 | } | |
975 | ||
976 | match = !regexec(&re, id, 1, pmatch, 0); | |
977 | if (match) { | |
978 | /* Ensure a full match. */ | |
979 | match = pmatch[0].rm_so == 0 && (size_t)pmatch[0].rm_eo == strlen(id); | |
980 | } | |
981 | regfree(&re); | |
982 | ||
983 | return match; | |
984 | } | |
985 | ||
660842e4 | 986 | static int pmu_add_cpu_aliases_map_callback(const struct pmu_event *pe, |
1ba3752a | 987 | const struct pmu_events_table *table __maybe_unused, |
660842e4 IR |
988 | void *vdata) |
989 | { | |
f26d22f1 | 990 | struct perf_pmu *pmu = vdata; |
660842e4 | 991 | |
d9c5f5f9 IR |
992 | perf_pmu__new_alias(pmu, pe->name, pe->desc, pe->event, /*val_fd=*/ NULL, |
993 | pe, EVENT_SRC_CPU_JSON); | |
660842e4 IR |
994 | return 0; |
995 | } | |
996 | ||
d77ade9f | 997 | /* |
d685819b IR |
998 | * From the pmu_events_table, find the events that correspond to the given |
999 | * PMU and add them to the list 'head'. | |
d77ade9f | 1000 | */ |
838a8c5f | 1001 | void pmu_add_cpu_aliases_table(struct perf_pmu *pmu, const struct pmu_events_table *table) |
d77ade9f | 1002 | { |
f26d22f1 | 1003 | pmu_events_table__for_each_event(table, pmu, pmu_add_cpu_aliases_map_callback, pmu); |
933f82ff SB |
1004 | } |
1005 | ||
838a8c5f | 1006 | static void pmu_add_cpu_aliases(struct perf_pmu *pmu) |
e45ad701 | 1007 | { |
7c52f10c | 1008 | if (!pmu->events_table) |
e45ad701 JG |
1009 | return; |
1010 | ||
e6ff1eed IR |
1011 | if (pmu->cpu_aliases_added) |
1012 | return; | |
1013 | ||
7c52f10c | 1014 | pmu_add_cpu_aliases_table(pmu, pmu->events_table); |
e6ff1eed | 1015 | pmu->cpu_aliases_added = true; |
e45ad701 JG |
1016 | } |
1017 | ||
29be2fe0 | 1018 | static int pmu_add_sys_aliases_iter_fn(const struct pmu_event *pe, |
1ba3752a | 1019 | const struct pmu_events_table *table __maybe_unused, |
f26d22f1 | 1020 | void *vdata) |
4513c719 | 1021 | { |
f26d22f1 | 1022 | struct perf_pmu *pmu = vdata; |
4513c719 | 1023 | |
4513c719 JG |
1024 | if (!pe->compat || !pe->pmu) |
1025 | return 0; | |
1026 | ||
2879ff36 | 1027 | if (pmu_uncore_alias_match(pe->pmu, pmu->name) && |
d9c5f5f9 | 1028 | pmu_uncore_identifier_match(pe->compat, pmu->id)) { |
7b723dbb | 1029 | perf_pmu__new_alias(pmu, |
edb217ff IR |
1030 | pe->name, |
1031 | pe->desc, | |
1032 | pe->event, | |
1033 | /*val_fd=*/ NULL, | |
d9c5f5f9 IR |
1034 | pe, |
1035 | EVENT_SRC_SYS_JSON); | |
4513c719 JG |
1036 | } |
1037 | ||
1038 | return 0; | |
1039 | } | |
1040 | ||
838a8c5f | 1041 | void pmu_add_sys_aliases(struct perf_pmu *pmu) |
4513c719 | 1042 | { |
4513c719 JG |
1043 | if (!pmu->id) |
1044 | return; | |
1045 | ||
f26d22f1 | 1046 | pmu_for_each_sys_event(pmu_add_sys_aliases_iter_fn, pmu); |
4513c719 JG |
1047 | } |
1048 | ||
b1f05622 | 1049 | static char *pmu_find_alias_name(struct perf_pmu *pmu, int dirfd) |
13d60ba0 | 1050 | { |
b1f05622 IR |
1051 | FILE *file = perf_pmu__open_file_at(pmu, dirfd, "alias"); |
1052 | char *line = NULL; | |
1053 | size_t line_len = 0; | |
1054 | ssize_t ret; | |
13d60ba0 | 1055 | |
b1f05622 IR |
1056 | if (!file) |
1057 | return NULL; | |
1058 | ||
1059 | ret = getline(&line, &line_len, file); | |
1060 | if (ret < 0) { | |
1061 | fclose(file); | |
1062 | return NULL; | |
1063 | } | |
1064 | /* Remove trailing newline. */ | |
1065 | if (ret > 0 && line[ret - 1] == '\n') | |
1066 | line[--ret] = '\0'; | |
1067 | ||
1068 | fclose(file); | |
1069 | return line; | |
13d60ba0 KL |
1070 | } |
1071 | ||
3a69672e | 1072 | static int pmu_max_precise(int dirfd, struct perf_pmu *pmu) |
90a86bde | 1073 | { |
90a86bde JO |
1074 | int max_precise = -1; |
1075 | ||
3a69672e | 1076 | perf_pmu__scan_file_at(pmu, dirfd, "caps/max_precise", "%d", &max_precise); |
90a86bde JO |
1077 | return max_precise; |
1078 | } | |
1079 | ||
aa613601 | 1080 | void __weak |
bb65acdc | 1081 | perf_pmu__arch_init(struct perf_pmu *pmu) |
aa613601 | 1082 | { |
bb65acdc KL |
1083 | if (pmu->is_core) |
1084 | pmu->mem_events = perf_mem_events; | |
aa613601 IR |
1085 | } |
1086 | ||
aa1551f2 IR |
1087 | struct perf_pmu *perf_pmu__lookup(struct list_head *pmus, int dirfd, const char *name, |
1088 | bool eager_load) | |
cd82a32e JO |
1089 | { |
1090 | struct perf_pmu *pmu; | |
cd82a32e | 1091 | __u32 type; |
49afa7f6 | 1092 | |
838a8c5f IR |
1093 | pmu = zalloc(sizeof(*pmu)); |
1094 | if (!pmu) | |
1095 | return NULL; | |
1096 | ||
f63a536f IR |
1097 | pmu->name = strdup(name); |
1098 | if (!pmu->name) | |
1099 | goto err; | |
88ed9184 IR |
1100 | |
1101 | /* | |
1102 | * Read type early to fail fast if a lookup name isn't a PMU. Ensure | |
1103 | * that type value is successfully assigned (return 1). | |
1104 | */ | |
1105 | if (perf_pmu__scan_file_at(pmu, dirfd, "type", "%u", &type) != 1) | |
1106 | goto err; | |
1107 | ||
1108 | INIT_LIST_HEAD(&pmu->format); | |
1109 | INIT_LIST_HEAD(&pmu->aliases); | |
1110 | INIT_LIST_HEAD(&pmu->caps); | |
1111 | ||
cd82a32e JO |
1112 | /* |
1113 | * The pmu data we store & need consists of the pmu | |
1114 | * type value and format definitions. Load both right | |
1115 | * now. | |
1116 | */ | |
aa1551f2 | 1117 | if (pmu_format(pmu, dirfd, name, eager_load)) |
ef5de161 CJ |
1118 | goto err; |
1119 | ||
d06593aa IR |
1120 | pmu->is_core = is_pmu_core(name); |
1121 | pmu->cpus = pmu_cpumask(dirfd, name, pmu->is_core); | |
13d60ba0 | 1122 | |
54e32dc0 | 1123 | pmu->type = type; |
3a69672e | 1124 | pmu->is_uncore = pmu_is_uncore(dirfd, name); |
51d54847 JG |
1125 | if (pmu->is_uncore) |
1126 | pmu->id = pmu_id(name); | |
3a69672e | 1127 | pmu->max_precise = pmu_max_precise(dirfd, pmu); |
b1f05622 | 1128 | pmu->alias_name = pmu_find_alias_name(pmu, dirfd); |
7c52f10c | 1129 | pmu->events_table = perf_pmu__find_events_table(pmu); |
d9c5f5f9 IR |
1130 | /* |
1131 | * Load the sys json events/aliases when loading the PMU as each event | |
1132 | * may have a different compat regular expression. We therefore can't | |
1133 | * know the number of sys json events/aliases without computing the | |
1134 | * regular expressions for them all. | |
1135 | */ | |
838a8c5f | 1136 | pmu_add_sys_aliases(pmu); |
1eaf496e | 1137 | list_add_tail(&pmu->list, pmus); |
dc0a6202 | 1138 | |
aa613601 | 1139 | perf_pmu__arch_init(pmu); |
dc0a6202 | 1140 | |
18eb2ca8 IR |
1141 | if (eager_load) |
1142 | pmu_aliases_parse_eager(pmu, dirfd); | |
1143 | ||
cd82a32e | 1144 | return pmu; |
13d60ba0 | 1145 | err: |
efe98a7a | 1146 | zfree(&pmu->name); |
13d60ba0 KL |
1147 | free(pmu); |
1148 | return NULL; | |
cd82a32e JO |
1149 | } |
1150 | ||
628eaa4e IR |
1151 | /* Creates the PMU when sysfs scanning fails. */ |
1152 | struct perf_pmu *perf_pmu__create_placeholder_core_pmu(struct list_head *core_pmus) | |
1153 | { | |
1154 | struct perf_pmu *pmu = zalloc(sizeof(*pmu)); | |
1155 | ||
1156 | if (!pmu) | |
1157 | return NULL; | |
1158 | ||
1159 | pmu->name = strdup("cpu"); | |
1160 | if (!pmu->name) { | |
1161 | free(pmu); | |
1162 | return NULL; | |
1163 | } | |
1164 | ||
1165 | pmu->is_core = true; | |
1166 | pmu->type = PERF_TYPE_RAW; | |
1167 | pmu->cpus = cpu_map__online(); | |
1168 | ||
1169 | INIT_LIST_HEAD(&pmu->format); | |
1170 | INIT_LIST_HEAD(&pmu->aliases); | |
1171 | INIT_LIST_HEAD(&pmu->caps); | |
1172 | list_add_tail(&pmu->list, core_pmus); | |
1173 | return pmu; | |
1174 | } | |
1175 | ||
e552b7be RH |
1176 | void perf_pmu__warn_invalid_formats(struct perf_pmu *pmu) |
1177 | { | |
1178 | struct perf_pmu_format *format; | |
1179 | ||
68c25043 IR |
1180 | if (pmu->formats_checked) |
1181 | return; | |
1182 | ||
1183 | pmu->formats_checked = true; | |
1184 | ||
e552b7be RH |
1185 | /* fake pmu doesn't have format list */ |
1186 | if (pmu == &perf_pmu__fake) | |
1187 | return; | |
1188 | ||
50402641 IR |
1189 | list_for_each_entry(format, &pmu->format, list) { |
1190 | perf_pmu_format__load(pmu, format); | |
e552b7be RH |
1191 | if (format->value >= PERF_PMU_FORMAT_VALUE_CONFIG_END) { |
1192 | pr_warning("WARNING: '%s' format '%s' requires 'perf_event_attr::config%d'" | |
1193 | "which is not supported by this version of perf!\n", | |
1194 | pmu->name, format->name, format->value); | |
1195 | return; | |
1196 | } | |
50402641 | 1197 | } |
e552b7be RH |
1198 | } |
1199 | ||
c6d616fe | 1200 | bool evsel__is_aux_event(const struct evsel *evsel) |
e12ee9f7 | 1201 | { |
e76026bd | 1202 | struct perf_pmu *pmu = evsel__find_pmu(evsel); |
e12ee9f7 AH |
1203 | |
1204 | return pmu && pmu->auxtrace; | |
1205 | } | |
1206 | ||
6593f019 JC |
1207 | /* |
1208 | * Set @config_name to @val as long as the user hasn't already set or cleared it | |
1209 | * by passing a config term on the command line. | |
1210 | * | |
1211 | * @val is the value to put into the bits specified by @config_name rather than | |
1212 | * the bit pattern. It is shifted into position by this function, so to set | |
1213 | * something to true, pass 1 for val rather than a pre shifted value. | |
1214 | */ | |
1215 | #define field_prep(_mask, _val) (((_val) << (ffsll(_mask) - 1)) & (_mask)) | |
1216 | void evsel__set_config_if_unset(struct perf_pmu *pmu, struct evsel *evsel, | |
1217 | const char *config_name, u64 val) | |
1218 | { | |
1219 | u64 user_bits = 0, bits; | |
1220 | struct evsel_config_term *term = evsel__get_config_term(evsel, CFG_CHG); | |
1221 | ||
1222 | if (term) | |
1223 | user_bits = term->val.cfg_chg; | |
1224 | ||
da6a5afd | 1225 | bits = perf_pmu__format_bits(pmu, config_name); |
6593f019 JC |
1226 | |
1227 | /* Do nothing if the user changed the value */ | |
1228 | if (bits & user_bits) | |
1229 | return; | |
1230 | ||
1231 | /* Otherwise replace it */ | |
1232 | evsel->core.attr.config &= ~bits; | |
1233 | evsel->core.attr.config |= field_prep(bits, val); | |
1234 | } | |
1235 | ||
5c6ccc37 | 1236 | static struct perf_pmu_format * |
63883cb0 | 1237 | pmu_find_format(const struct list_head *formats, const char *name) |
cd82a32e | 1238 | { |
5c6ccc37 | 1239 | struct perf_pmu_format *format; |
cd82a32e JO |
1240 | |
1241 | list_for_each_entry(format, formats, list) | |
1242 | if (!strcmp(format->name, name)) | |
1243 | return format; | |
1244 | ||
1245 | return NULL; | |
1246 | } | |
1247 | ||
da6a5afd | 1248 | __u64 perf_pmu__format_bits(struct perf_pmu *pmu, const char *name) |
09ff6071 | 1249 | { |
da6a5afd | 1250 | struct perf_pmu_format *format = pmu_find_format(&pmu->format, name); |
09ff6071 AH |
1251 | __u64 bits = 0; |
1252 | int fbit; | |
1253 | ||
1254 | if (!format) | |
1255 | return 0; | |
1256 | ||
1257 | for_each_set_bit(fbit, format->bits, PERF_PMU_FORMAT_BITS) | |
1258 | bits |= 1ULL << fbit; | |
1259 | ||
1260 | return bits; | |
1261 | } | |
1262 | ||
7eb54733 | 1263 | int perf_pmu__format_type(struct perf_pmu *pmu, const char *name) |
a1ac7de6 | 1264 | { |
7eb54733 | 1265 | struct perf_pmu_format *format = pmu_find_format(&pmu->format, name); |
a1ac7de6 AH |
1266 | |
1267 | if (!format) | |
1268 | return -1; | |
1269 | ||
50402641 | 1270 | perf_pmu_format__load(pmu, format); |
a1ac7de6 AH |
1271 | return format->value; |
1272 | } | |
1273 | ||
cd82a32e | 1274 | /* |
dc0a6202 | 1275 | * Sets value based on the format definition (format parameter) |
4d39c89f | 1276 | * and unformatted value (value parameter). |
cd82a32e | 1277 | */ |
dc0a6202 AH |
1278 | static void pmu_format_value(unsigned long *format, __u64 value, __u64 *v, |
1279 | bool zero) | |
cd82a32e JO |
1280 | { |
1281 | unsigned long fbit, vbit; | |
cd82a32e JO |
1282 | |
1283 | for (fbit = 0, vbit = 0; fbit < PERF_PMU_FORMAT_BITS; fbit++) { | |
1284 | ||
1285 | if (!test_bit(fbit, format)) | |
1286 | continue; | |
1287 | ||
dc0a6202 AH |
1288 | if (value & (1llu << vbit++)) |
1289 | *v |= (1llu << fbit); | |
1290 | else if (zero) | |
1291 | *v &= ~(1llu << fbit); | |
cd82a32e | 1292 | } |
cd82a32e JO |
1293 | } |
1294 | ||
0efe6b67 AH |
1295 | static __u64 pmu_format_max_value(const unsigned long *format) |
1296 | { | |
1b9caa10 | 1297 | int w; |
ac0e2cd5 | 1298 | |
1b9caa10 JO |
1299 | w = bitmap_weight(format, PERF_PMU_FORMAT_BITS); |
1300 | if (!w) | |
1301 | return 0; | |
1302 | if (w < 64) | |
1303 | return (1ULL << w) - 1; | |
1304 | return -1; | |
0efe6b67 AH |
1305 | } |
1306 | ||
688d4dfc CS |
1307 | /* |
1308 | * Term is a string term, and might be a param-term. Try to look up it's value | |
1309 | * in the remaining terms. | |
1310 | * - We have a term like "base-or-format-term=param-term", | |
1311 | * - We need to find the value supplied for "param-term" (with param-term named | |
1312 | * in a config string) later on in the term list. | |
1313 | */ | |
1314 | static int pmu_resolve_param_term(struct parse_events_term *term, | |
0d3f0e6f | 1315 | struct parse_events_terms *head_terms, |
688d4dfc CS |
1316 | __u64 *value) |
1317 | { | |
1318 | struct parse_events_term *t; | |
1319 | ||
0d3f0e6f | 1320 | list_for_each_entry(t, &head_terms->terms, list) { |
2a3d252d IR |
1321 | if (t->type_val == PARSE_EVENTS__TERM_TYPE_NUM && |
1322 | t->config && !strcmp(t->config, term->config)) { | |
1323 | t->used = true; | |
1324 | *value = t->val.num; | |
1325 | return 0; | |
688d4dfc CS |
1326 | } |
1327 | } | |
1328 | ||
bb963e16 | 1329 | if (verbose > 0) |
688d4dfc CS |
1330 | printf("Required parameter '%s' not specified\n", term->config); |
1331 | ||
1332 | return -1; | |
1333 | } | |
1334 | ||
63883cb0 | 1335 | static char *pmu_formats_string(const struct list_head *formats) |
e64b020b JO |
1336 | { |
1337 | struct perf_pmu_format *format; | |
11db4e29 MH |
1338 | char *str = NULL; |
1339 | struct strbuf buf = STRBUF_INIT; | |
f1417cea | 1340 | unsigned int i = 0; |
e64b020b | 1341 | |
ffeb883e | 1342 | if (!formats) |
e64b020b JO |
1343 | return NULL; |
1344 | ||
1345 | /* sysfs exported terms */ | |
ffeb883e | 1346 | list_for_each_entry(format, formats, list) |
11db4e29 MH |
1347 | if (strbuf_addf(&buf, i++ ? ",%s" : "%s", format->name) < 0) |
1348 | goto error; | |
e64b020b | 1349 | |
ffeb883e | 1350 | str = strbuf_detach(&buf, NULL); |
11db4e29 | 1351 | error: |
ffeb883e | 1352 | strbuf_release(&buf); |
e64b020b | 1353 | |
e64b020b | 1354 | return str; |
e64b020b JO |
1355 | } |
1356 | ||
cd82a32e JO |
1357 | /* |
1358 | * Setup one of config[12] attr members based on the | |
88aca8d9 | 1359 | * user input data - term parameter. |
cd82a32e | 1360 | */ |
63883cb0 | 1361 | static int pmu_config_term(const struct perf_pmu *pmu, |
cd82a32e | 1362 | struct perf_event_attr *attr, |
dc0a6202 | 1363 | struct parse_events_term *term, |
0d3f0e6f | 1364 | struct parse_events_terms *head_terms, |
e64b020b | 1365 | bool zero, struct parse_events_error *err) |
cd82a32e | 1366 | { |
5c6ccc37 | 1367 | struct perf_pmu_format *format; |
cd82a32e | 1368 | __u64 *vp; |
0efe6b67 | 1369 | __u64 val, max_val; |
688d4dfc CS |
1370 | |
1371 | /* | |
1372 | * If this is a parameter we've already used for parameterized-eval, | |
1373 | * skip it in normal eval. | |
1374 | */ | |
1375 | if (term->used) | |
1376 | return 0; | |
cd82a32e JO |
1377 | |
1378 | /* | |
cd82a32e JO |
1379 | * Hardcoded terms should be already in, so nothing |
1380 | * to be done for them. | |
1381 | */ | |
1382 | if (parse_events__is_hardcoded_term(term)) | |
1383 | return 0; | |
1384 | ||
804fee5d | 1385 | format = pmu_find_format(&pmu->format, term->config); |
688d4dfc | 1386 | if (!format) { |
804fee5d | 1387 | char *pmu_term = pmu_formats_string(&pmu->format); |
4ac22b48 IR |
1388 | char *unknown_term; |
1389 | char *help_msg; | |
1390 | ||
1391 | if (asprintf(&unknown_term, | |
1392 | "unknown term '%s' for pmu '%s'", | |
804fee5d | 1393 | term->config, pmu->name) < 0) |
4ac22b48 IR |
1394 | unknown_term = NULL; |
1395 | help_msg = parse_events_formats_error_string(pmu_term); | |
e64b020b | 1396 | if (err) { |
6c191289 | 1397 | parse_events_error__handle(err, term->err_term, |
4ac22b48 IR |
1398 | unknown_term, |
1399 | help_msg); | |
1400 | } else { | |
1401 | pr_debug("%s (%s)\n", unknown_term, help_msg); | |
1402 | free(unknown_term); | |
e64b020b | 1403 | } |
4ac22b48 | 1404 | free(pmu_term); |
cd82a32e | 1405 | return -EINVAL; |
688d4dfc | 1406 | } |
50402641 | 1407 | perf_pmu_format__load(pmu, format); |
cd82a32e JO |
1408 | switch (format->value) { |
1409 | case PERF_PMU_FORMAT_VALUE_CONFIG: | |
1410 | vp = &attr->config; | |
1411 | break; | |
1412 | case PERF_PMU_FORMAT_VALUE_CONFIG1: | |
1413 | vp = &attr->config1; | |
1414 | break; | |
1415 | case PERF_PMU_FORMAT_VALUE_CONFIG2: | |
1416 | vp = &attr->config2; | |
1417 | break; | |
204e7c49 RH |
1418 | case PERF_PMU_FORMAT_VALUE_CONFIG3: |
1419 | vp = &attr->config3; | |
1420 | break; | |
cd82a32e JO |
1421 | default: |
1422 | return -EINVAL; | |
1423 | } | |
1424 | ||
16fa7e82 | 1425 | /* |
688d4dfc CS |
1426 | * Either directly use a numeric term, or try to translate string terms |
1427 | * using event parameters. | |
16fa7e82 | 1428 | */ |
99e7138e JO |
1429 | if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) { |
1430 | if (term->no_value && | |
1431 | bitmap_weight(format->bits, PERF_PMU_FORMAT_BITS) > 1) { | |
1432 | if (err) { | |
6c191289 | 1433 | parse_events_error__handle(err, term->err_val, |
448d732c IR |
1434 | strdup("no value assigned for term"), |
1435 | NULL); | |
99e7138e JO |
1436 | } |
1437 | return -EINVAL; | |
1438 | } | |
1439 | ||
688d4dfc | 1440 | val = term->val.num; |
99e7138e | 1441 | } else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) { |
688d4dfc | 1442 | if (strcmp(term->val.str, "?")) { |
bb963e16 | 1443 | if (verbose > 0) { |
688d4dfc CS |
1444 | pr_info("Invalid sysfs entry %s=%s\n", |
1445 | term->config, term->val.str); | |
e64b020b JO |
1446 | } |
1447 | if (err) { | |
6c191289 | 1448 | parse_events_error__handle(err, term->err_val, |
448d732c IR |
1449 | strdup("expected numeric value"), |
1450 | NULL); | |
e64b020b | 1451 | } |
688d4dfc CS |
1452 | return -EINVAL; |
1453 | } | |
1454 | ||
1455 | if (pmu_resolve_param_term(term, head_terms, &val)) | |
1456 | return -EINVAL; | |
1457 | } else | |
1458 | return -EINVAL; | |
1459 | ||
0efe6b67 AH |
1460 | max_val = pmu_format_max_value(format->bits); |
1461 | if (val > max_val) { | |
1462 | if (err) { | |
448d732c IR |
1463 | char *err_str; |
1464 | ||
6c191289 | 1465 | parse_events_error__handle(err, term->err_val, |
448d732c | 1466 | asprintf(&err_str, |
f5144eca IR |
1467 | "value too big for format (%s), maximum is %llu", |
1468 | format->name, (unsigned long long)max_val) < 0 | |
448d732c IR |
1469 | ? strdup("value too big for format") |
1470 | : err_str, | |
1471 | NULL); | |
0efe6b67 AH |
1472 | return -EINVAL; |
1473 | } | |
1474 | /* | |
1475 | * Assume we don't care if !err, in which case the value will be | |
1476 | * silently truncated. | |
1477 | */ | |
1478 | } | |
1479 | ||
688d4dfc | 1480 | pmu_format_value(format->bits, val, vp, zero); |
cd82a32e JO |
1481 | return 0; |
1482 | } | |
1483 | ||
63883cb0 | 1484 | int perf_pmu__config_terms(const struct perf_pmu *pmu, |
cff7f956 | 1485 | struct perf_event_attr *attr, |
0d3f0e6f | 1486 | struct parse_events_terms *terms, |
e64b020b | 1487 | bool zero, struct parse_events_error *err) |
cd82a32e | 1488 | { |
6cee6cd3 | 1489 | struct parse_events_term *term; |
cd82a32e | 1490 | |
0d3f0e6f IR |
1491 | list_for_each_entry(term, &terms->terms, list) { |
1492 | if (pmu_config_term(pmu, attr, term, terms, zero, err)) | |
cd82a32e | 1493 | return -EINVAL; |
688d4dfc | 1494 | } |
cd82a32e JO |
1495 | |
1496 | return 0; | |
1497 | } | |
1498 | ||
1499 | /* | |
1500 | * Configures event's 'attr' parameter based on the: | |
1501 | * 1) users input - specified in terms parameter | |
1502 | * 2) pmu format definitions - specified by pmu parameter | |
1503 | */ | |
1504 | int perf_pmu__config(struct perf_pmu *pmu, struct perf_event_attr *attr, | |
0d3f0e6f | 1505 | struct parse_events_terms *head_terms, |
e64b020b | 1506 | struct parse_events_error *err) |
cd82a32e | 1507 | { |
0197da7a | 1508 | bool zero = !!pmu->perf_event_attr_init_default; |
dc0a6202 | 1509 | |
804fee5d | 1510 | return perf_pmu__config_terms(pmu, attr, head_terms, zero, err); |
cd82a32e JO |
1511 | } |
1512 | ||
5c6ccc37 ACM |
1513 | static struct perf_pmu_alias *pmu_find_alias(struct perf_pmu *pmu, |
1514 | struct parse_events_term *term) | |
a6146d50 | 1515 | { |
e6ff1eed | 1516 | struct perf_pmu_alias *alias; |
970ef02e | 1517 | const char *name; |
a6146d50 ZY |
1518 | |
1519 | if (parse_events__is_hardcoded_term(term)) | |
1520 | return NULL; | |
1521 | ||
1522 | if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) { | |
64199ae4 | 1523 | if (!term->no_value) |
a6146d50 ZY |
1524 | return NULL; |
1525 | if (pmu_find_format(&pmu->format, term->config)) | |
1526 | return NULL; | |
1527 | name = term->config; | |
c3245d20 | 1528 | |
a6146d50 ZY |
1529 | } else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) { |
1530 | if (strcasecmp(term->config, "event")) | |
1531 | return NULL; | |
1532 | name = term->val.str; | |
1533 | } else { | |
1534 | return NULL; | |
1535 | } | |
1536 | ||
8d4b6d37 | 1537 | alias = perf_pmu__find_alias(pmu, name, /*load=*/ true); |
e6ff1eed IR |
1538 | if (alias || pmu->cpu_aliases_added) |
1539 | return alias; | |
1540 | ||
1541 | /* Alias doesn't exist, try to get it from the json events. */ | |
1542 | if (pmu->events_table && | |
1543 | pmu_events_table__find_event(pmu->events_table, pmu, name, | |
1544 | pmu_add_cpu_aliases_map_callback, | |
1545 | pmu) == 0) { | |
8d4b6d37 | 1546 | alias = perf_pmu__find_alias(pmu, name, /*load=*/ false); |
e6ff1eed IR |
1547 | } |
1548 | return alias; | |
a6146d50 ZY |
1549 | } |
1550 | ||
410136f5 | 1551 | |
7b723dbb IR |
1552 | static int check_info_data(struct perf_pmu *pmu, |
1553 | struct perf_pmu_alias *alias, | |
9d31cb93 IR |
1554 | struct perf_pmu_info *info, |
1555 | struct parse_events_error *err, | |
1556 | int column) | |
410136f5 | 1557 | { |
7b723dbb | 1558 | read_alias_info(pmu, alias); |
410136f5 SE |
1559 | /* |
1560 | * Only one term in event definition can | |
1d9e446b JO |
1561 | * define unit, scale and snapshot, fail |
1562 | * if there's more than one. | |
410136f5 | 1563 | */ |
9d31cb93 IR |
1564 | if (info->unit && alias->unit[0]) { |
1565 | parse_events_error__handle(err, column, | |
1566 | strdup("Attempt to set event's unit twice"), | |
1567 | NULL); | |
1568 | return -EINVAL; | |
1569 | } | |
1570 | if (info->scale && alias->scale) { | |
1571 | parse_events_error__handle(err, column, | |
1572 | strdup("Attempt to set event's scale twice"), | |
1573 | NULL); | |
1574 | return -EINVAL; | |
1575 | } | |
1576 | if (info->snapshot && alias->snapshot) { | |
1577 | parse_events_error__handle(err, column, | |
1578 | strdup("Attempt to set event snapshot twice"), | |
1579 | NULL); | |
410136f5 | 1580 | return -EINVAL; |
9d31cb93 | 1581 | } |
410136f5 | 1582 | |
b30a7d1f | 1583 | if (alias->unit[0]) |
1d9e446b | 1584 | info->unit = alias->unit; |
410136f5 SE |
1585 | |
1586 | if (alias->scale) | |
1d9e446b JO |
1587 | info->scale = alias->scale; |
1588 | ||
1589 | if (alias->snapshot) | |
1590 | info->snapshot = alias->snapshot; | |
410136f5 SE |
1591 | |
1592 | return 0; | |
1593 | } | |
1594 | ||
a6146d50 ZY |
1595 | /* |
1596 | * Find alias in the terms list and replace it with the terms | |
1597 | * defined for the alias | |
1598 | */ | |
0d3f0e6f | 1599 | int perf_pmu__check_alias(struct perf_pmu *pmu, struct parse_events_terms *head_terms, |
a24d9d9d IR |
1600 | struct perf_pmu_info *info, bool *rewrote_terms, |
1601 | struct parse_events_error *err) | |
a6146d50 | 1602 | { |
6cee6cd3 | 1603 | struct parse_events_term *term, *h; |
5c6ccc37 | 1604 | struct perf_pmu_alias *alias; |
a6146d50 ZY |
1605 | int ret; |
1606 | ||
a24d9d9d | 1607 | *rewrote_terms = false; |
044330c1 MF |
1608 | info->per_pkg = false; |
1609 | ||
8a398897 SE |
1610 | /* |
1611 | * Mark unit and scale as not set | |
1612 | * (different from default values, see below) | |
1613 | */ | |
1d9e446b JO |
1614 | info->unit = NULL; |
1615 | info->scale = 0.0; | |
1616 | info->snapshot = false; | |
410136f5 | 1617 | |
0d3f0e6f | 1618 | list_for_each_entry_safe(term, h, &head_terms->terms, list) { |
a6146d50 ZY |
1619 | alias = pmu_find_alias(pmu, term); |
1620 | if (!alias) | |
1621 | continue; | |
f5144eca | 1622 | ret = pmu_alias_terms(alias, term->err_term, &term->list); |
9d31cb93 IR |
1623 | if (ret) { |
1624 | parse_events_error__handle(err, term->err_term, | |
1625 | strdup("Failure to duplicate terms"), | |
1626 | NULL); | |
a6146d50 | 1627 | return ret; |
9d31cb93 | 1628 | } |
a24d9d9d | 1629 | *rewrote_terms = true; |
7b723dbb | 1630 | ret = check_info_data(pmu, alias, info, err, term->err_term); |
410136f5 SE |
1631 | if (ret) |
1632 | return ret; | |
1633 | ||
044330c1 MF |
1634 | if (alias->per_pkg) |
1635 | info->per_pkg = true; | |
1636 | ||
e56fbc9d | 1637 | list_del_init(&term->list); |
1dc92556 | 1638 | parse_events_term__delete(term); |
a6146d50 | 1639 | } |
8a398897 SE |
1640 | |
1641 | /* | |
4d39c89f | 1642 | * if no unit or scale found in aliases, then |
8a398897 SE |
1643 | * set defaults as for evsel |
1644 | * unit cannot left to NULL | |
1645 | */ | |
46441bdc MF |
1646 | if (info->unit == NULL) |
1647 | info->unit = ""; | |
8a398897 | 1648 | |
46441bdc MF |
1649 | if (info->scale == 0.0) |
1650 | info->scale = 1.0; | |
8a398897 | 1651 | |
a6146d50 ZY |
1652 | return 0; |
1653 | } | |
1654 | ||
c3245d20 IR |
1655 | struct find_event_args { |
1656 | const char *event; | |
1657 | void *state; | |
1658 | pmu_event_callback cb; | |
1659 | }; | |
1660 | ||
1661 | static int find_event_callback(void *state, struct pmu_event_info *info) | |
838a8c5f | 1662 | { |
c3245d20 | 1663 | struct find_event_args *args = state; |
838a8c5f | 1664 | |
c3245d20 IR |
1665 | if (!strcmp(args->event, info->name)) |
1666 | return args->cb(args->state, info); | |
838a8c5f | 1667 | |
c3245d20 | 1668 | return 0; |
838a8c5f | 1669 | } |
c3245d20 IR |
1670 | |
1671 | int perf_pmu__find_event(struct perf_pmu *pmu, const char *event, void *state, pmu_event_callback cb) | |
1672 | { | |
1673 | struct find_event_args args = { | |
1674 | .event = event, | |
1675 | .state = state, | |
1676 | .cb = cb, | |
1677 | }; | |
1678 | ||
cd4e1efb IR |
1679 | /* Sub-optimal, but function is only used by tests. */ |
1680 | return perf_pmu__for_each_event(pmu, /*skip_duplicate_pmus=*/ false, | |
1681 | &args, find_event_callback); | |
c3245d20 IR |
1682 | } |
1683 | ||
804fee5d | 1684 | static void perf_pmu__del_formats(struct list_head *formats) |
d26383dc NK |
1685 | { |
1686 | struct perf_pmu_format *fmt, *tmp; | |
1687 | ||
1688 | list_for_each_entry_safe(fmt, tmp, formats, list) { | |
1689 | list_del(&fmt->list); | |
efe98a7a | 1690 | zfree(&fmt->name); |
d26383dc NK |
1691 | free(fmt); |
1692 | } | |
1693 | } | |
1694 | ||
07d2b820 IR |
1695 | bool perf_pmu__has_format(const struct perf_pmu *pmu, const char *name) |
1696 | { | |
1697 | struct perf_pmu_format *format; | |
1698 | ||
1699 | list_for_each_entry(format, &pmu->format, list) { | |
1700 | if (!strcmp(format->name, name)) | |
1701 | return true; | |
1702 | } | |
1703 | return false; | |
1704 | } | |
1705 | ||
4ccf3bb7 IR |
1706 | int perf_pmu__for_each_format(struct perf_pmu *pmu, void *state, pmu_format_callback cb) |
1707 | { | |
1708 | static const char *const terms[] = { | |
1709 | "config=0..0xffffffffffffffff", | |
1710 | "config1=0..0xffffffffffffffff", | |
1711 | "config2=0..0xffffffffffffffff", | |
1712 | "config3=0..0xffffffffffffffff", | |
1713 | "name=string", | |
1714 | "period=number", | |
1715 | "freq=number", | |
1716 | "branch_type=(u|k|hv|any|...)", | |
1717 | "time", | |
1718 | "call-graph=(fp|dwarf|lbr)", | |
1719 | "stack-size=number", | |
1720 | "max-stack=number", | |
1721 | "nr=number", | |
1722 | "inherit", | |
1723 | "no-inherit", | |
1724 | "overwrite", | |
1725 | "no-overwrite", | |
1726 | "percore", | |
1727 | "aux-output", | |
1728 | "aux-sample-size=number", | |
1729 | }; | |
1730 | struct perf_pmu_format *format; | |
1731 | int ret; | |
1732 | ||
1733 | /* | |
1734 | * max-events and driver-config are missing above as are the internal | |
1735 | * types user, metric-id, raw, legacy cache and hardware. Assert against | |
1736 | * the enum parse_events__term_type so they are kept in sync. | |
1737 | */ | |
1738 | _Static_assert(ARRAY_SIZE(terms) == __PARSE_EVENTS__TERM_TYPE_NR - 6, | |
1739 | "perf_pmu__for_each_format()'s terms must be kept in sync with enum parse_events__term_type"); | |
1740 | list_for_each_entry(format, &pmu->format, list) { | |
1741 | perf_pmu_format__load(pmu, format); | |
1742 | ret = cb(state, format->name, (int)format->value, format->bits); | |
1743 | if (ret) | |
1744 | return ret; | |
1745 | } | |
1746 | if (!pmu->is_core) | |
1747 | return 0; | |
1748 | ||
1749 | for (size_t i = 0; i < ARRAY_SIZE(terms); i++) { | |
1750 | int config = PERF_PMU_FORMAT_VALUE_CONFIG; | |
1751 | ||
1752 | if (i < PERF_PMU_FORMAT_VALUE_CONFIG_END) | |
1753 | config = i; | |
1754 | ||
1755 | ret = cb(state, terms[i], config, /*bits=*/NULL); | |
1756 | if (ret) | |
1757 | return ret; | |
1758 | } | |
1759 | return 0; | |
1760 | } | |
1761 | ||
d504fae9 JG |
1762 | bool is_pmu_core(const char *name) |
1763 | { | |
6fbd67b0 | 1764 | return !strcmp(name, "cpu") || !strcmp(name, "cpum_cf") || is_sysfs_pmu_core(name); |
4bf7e81a IR |
1765 | } |
1766 | ||
6fd1e519 IR |
1767 | bool perf_pmu__supports_legacy_cache(const struct perf_pmu *pmu) |
1768 | { | |
e20d1f2f | 1769 | return pmu->is_core; |
6fd1e519 IR |
1770 | } |
1771 | ||
52c7b4d3 IR |
1772 | bool perf_pmu__auto_merge_stats(const struct perf_pmu *pmu) |
1773 | { | |
710dffc9 | 1774 | return !pmu->is_core || perf_pmus__num_core_pmus() == 1; |
52c7b4d3 IR |
1775 | } |
1776 | ||
e6ff1eed | 1777 | bool perf_pmu__have_event(struct perf_pmu *pmu, const char *name) |
4cabc3d1 | 1778 | { |
a24d9d9d IR |
1779 | if (!name) |
1780 | return false; | |
8d4b6d37 | 1781 | if (perf_pmu__find_alias(pmu, name, /*load=*/ true) != NULL) |
e6ff1eed IR |
1782 | return true; |
1783 | if (pmu->cpu_aliases_added || !pmu->events_table) | |
1784 | return false; | |
1785 | return pmu_events_table__find_event(pmu->events_table, pmu, name, NULL, NULL) == 0; | |
c3245d20 | 1786 | } |
4cabc3d1 | 1787 | |
e6ff1eed | 1788 | size_t perf_pmu__num_events(struct perf_pmu *pmu) |
c3245d20 | 1789 | { |
8d4b6d37 IR |
1790 | size_t nr; |
1791 | ||
7b6dd7a9 | 1792 | pmu_aliases_parse(pmu); |
5484fd27 | 1793 | nr = pmu->sysfs_aliases + pmu->sys_json_aliases; |
c3245d20 | 1794 | |
e6ff1eed | 1795 | if (pmu->cpu_aliases_added) |
d9c5f5f9 | 1796 | nr += pmu->cpu_json_aliases; |
e6ff1eed | 1797 | else if (pmu->events_table) |
d9c5f5f9 IR |
1798 | nr += pmu_events_table__num_events(pmu->events_table, pmu) - pmu->cpu_json_aliases; |
1799 | else | |
1800 | assert(pmu->cpu_json_aliases == 0); | |
c3245d20 IR |
1801 | |
1802 | return pmu->selectable ? nr + 1 : nr; | |
1803 | } | |
1804 | ||
1805 | static int sub_non_neg(int a, int b) | |
1806 | { | |
1807 | if (b > a) | |
1808 | return 0; | |
1809 | return a - b; | |
1810 | } | |
1811 | ||
1812 | static char *format_alias(char *buf, int len, const struct perf_pmu *pmu, | |
cd4e1efb | 1813 | const struct perf_pmu_alias *alias, bool skip_duplicate_pmus) |
c3245d20 IR |
1814 | { |
1815 | struct parse_events_term *term; | |
7afbf90e JC |
1816 | size_t pmu_name_len = pmu_deduped_name_len(pmu, pmu->name, |
1817 | skip_duplicate_pmus); | |
3241d46f | 1818 | int used = snprintf(buf, len, "%.*s/%s", (int)pmu_name_len, pmu->name, alias->name); |
c3245d20 | 1819 | |
0d3f0e6f | 1820 | list_for_each_entry(term, &alias->terms.terms, list) { |
c3245d20 IR |
1821 | if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) |
1822 | used += snprintf(buf + used, sub_non_neg(len, used), | |
1823 | ",%s=%s", term->config, | |
1824 | term->val.str); | |
4cabc3d1 | 1825 | } |
c3245d20 IR |
1826 | |
1827 | if (sub_non_neg(len, used) > 0) { | |
1828 | buf[used] = '/'; | |
1829 | used++; | |
1830 | } | |
1831 | if (sub_non_neg(len, used) > 0) { | |
1832 | buf[used] = '\0'; | |
1833 | used++; | |
1834 | } else | |
1835 | buf[len - 1] = '\0'; | |
1836 | ||
1837 | return buf; | |
1838 | } | |
1839 | ||
cd4e1efb IR |
1840 | int perf_pmu__for_each_event(struct perf_pmu *pmu, bool skip_duplicate_pmus, |
1841 | void *state, pmu_event_callback cb) | |
c3245d20 IR |
1842 | { |
1843 | char buf[1024]; | |
1844 | struct perf_pmu_alias *event; | |
1845 | struct pmu_event_info info = { | |
1846 | .pmu = pmu, | |
1847 | }; | |
1848 | int ret = 0; | |
30f0b435 | 1849 | struct strbuf sb; |
c3245d20 | 1850 | |
30f0b435 | 1851 | strbuf_init(&sb, /*hint=*/ 0); |
7b6dd7a9 | 1852 | pmu_aliases_parse(pmu); |
e6ff1eed | 1853 | pmu_add_cpu_aliases(pmu); |
c3245d20 | 1854 | list_for_each_entry(event, &pmu->aliases, list) { |
3241d46f | 1855 | size_t buf_used, pmu_name_len; |
c3245d20 IR |
1856 | |
1857 | info.pmu_name = event->pmu_name ?: pmu->name; | |
7afbf90e JC |
1858 | pmu_name_len = pmu_deduped_name_len(pmu, info.pmu_name, |
1859 | skip_duplicate_pmus); | |
c3245d20 IR |
1860 | info.alias = NULL; |
1861 | if (event->desc) { | |
1862 | info.name = event->name; | |
1863 | buf_used = 0; | |
1864 | } else { | |
cd4e1efb IR |
1865 | info.name = format_alias(buf, sizeof(buf), pmu, event, |
1866 | skip_duplicate_pmus); | |
c3245d20 IR |
1867 | if (pmu->is_core) { |
1868 | info.alias = info.name; | |
1869 | info.name = event->name; | |
1870 | } | |
1871 | buf_used = strlen(buf) + 1; | |
1872 | } | |
1873 | info.scale_unit = NULL; | |
1874 | if (strlen(event->unit) || event->scale != 1.0) { | |
1875 | info.scale_unit = buf + buf_used; | |
1876 | buf_used += snprintf(buf + buf_used, sizeof(buf) - buf_used, | |
1877 | "%G%s", event->scale, event->unit) + 1; | |
1878 | } | |
1879 | info.desc = event->desc; | |
1880 | info.long_desc = event->long_desc; | |
1881 | info.encoding_desc = buf + buf_used; | |
0d3f0e6f | 1882 | parse_events_terms__to_strbuf(&event->terms, &sb); |
c3245d20 | 1883 | buf_used += snprintf(buf + buf_used, sizeof(buf) - buf_used, |
3241d46f | 1884 | "%.*s/%s/", (int)pmu_name_len, info.pmu_name, sb.buf) + 1; |
c3245d20 | 1885 | info.topic = event->topic; |
30f0b435 | 1886 | info.str = sb.buf; |
c3245d20 IR |
1887 | info.deprecated = event->deprecated; |
1888 | ret = cb(state, &info); | |
1889 | if (ret) | |
30f0b435 IR |
1890 | goto out; |
1891 | strbuf_setlen(&sb, /*len=*/ 0); | |
c3245d20 IR |
1892 | } |
1893 | if (pmu->selectable) { | |
1894 | info.name = buf; | |
1895 | snprintf(buf, sizeof(buf), "%s//", pmu->name); | |
1896 | info.alias = NULL; | |
1897 | info.scale_unit = NULL; | |
1898 | info.desc = NULL; | |
1899 | info.long_desc = NULL; | |
1900 | info.encoding_desc = NULL; | |
1901 | info.topic = NULL; | |
1902 | info.pmu_name = pmu->name; | |
1903 | info.deprecated = false; | |
1904 | ret = cb(state, &info); | |
1905 | } | |
30f0b435 IR |
1906 | out: |
1907 | strbuf_release(&sb); | |
c3245d20 | 1908 | return ret; |
4cabc3d1 | 1909 | } |
7d4bdab5 | 1910 | |
e3edd6cf IR |
1911 | bool pmu__name_match(const struct perf_pmu *pmu, const char *pmu_name) |
1912 | { | |
1913 | return !strcmp(pmu->name, pmu_name) || | |
d2045f87 IR |
1914 | (pmu->is_uncore && pmu_uncore_alias_match(pmu_name, pmu->name)) || |
1915 | /* | |
1916 | * jevents and tests use default_core as a marker for any core | |
1917 | * PMU as the PMU name varies across architectures. | |
1918 | */ | |
1919 | (pmu->is_core && !strcmp(pmu_name, "default_core")); | |
e3edd6cf IR |
1920 | } |
1921 | ||
251aa040 IR |
1922 | bool perf_pmu__is_software(const struct perf_pmu *pmu) |
1923 | { | |
24852ef2 IR |
1924 | const char *known_sw_pmus[] = { |
1925 | "kprobe", | |
1926 | "msr", | |
1927 | "uprobe", | |
1928 | }; | |
1929 | ||
251aa040 IR |
1930 | if (pmu->is_core || pmu->is_uncore || pmu->auxtrace) |
1931 | return false; | |
1932 | switch (pmu->type) { | |
1933 | case PERF_TYPE_HARDWARE: return false; | |
1934 | case PERF_TYPE_SOFTWARE: return true; | |
1935 | case PERF_TYPE_TRACEPOINT: return true; | |
1936 | case PERF_TYPE_HW_CACHE: return false; | |
1937 | case PERF_TYPE_RAW: return false; | |
1938 | case PERF_TYPE_BREAKPOINT: return true; | |
1939 | default: break; | |
1940 | } | |
24852ef2 IR |
1941 | for (size_t i = 0; i < ARRAY_SIZE(known_sw_pmus); i++) { |
1942 | if (!strcmp(pmu->name, known_sw_pmus[i])) | |
1943 | return true; | |
1944 | } | |
1945 | return false; | |
251aa040 IR |
1946 | } |
1947 | ||
3a42f4c7 | 1948 | FILE *perf_pmu__open_file(const struct perf_pmu *pmu, const char *name) |
7d4bdab5 | 1949 | { |
7d4bdab5 | 1950 | char path[PATH_MAX]; |
7d4bdab5 | 1951 | |
f8ad6018 JC |
1952 | if (!perf_pmu__pathname_scnprintf(path, sizeof(path), pmu->name, name) || |
1953 | !file_available(path)) | |
7d4bdab5 AH |
1954 | return NULL; |
1955 | ||
7d4bdab5 AH |
1956 | return fopen(path, "r"); |
1957 | } | |
1958 | ||
3a42f4c7 | 1959 | FILE *perf_pmu__open_file_at(const struct perf_pmu *pmu, int dirfd, const char *name) |
3a69672e NK |
1960 | { |
1961 | int fd; | |
1962 | ||
1963 | fd = perf_pmu__pathname_fd(dirfd, pmu->name, name, O_RDONLY); | |
1964 | if (fd < 0) | |
1965 | return NULL; | |
1966 | ||
1967 | return fdopen(fd, "r"); | |
1968 | } | |
1969 | ||
3a42f4c7 | 1970 | int perf_pmu__scan_file(const struct perf_pmu *pmu, const char *name, const char *fmt, |
7d4bdab5 AH |
1971 | ...) |
1972 | { | |
1973 | va_list args; | |
1974 | FILE *file; | |
1975 | int ret = EOF; | |
1976 | ||
1977 | va_start(args, fmt); | |
1978 | file = perf_pmu__open_file(pmu, name); | |
1979 | if (file) { | |
1980 | ret = vfscanf(file, fmt, args); | |
1981 | fclose(file); | |
1982 | } | |
1983 | va_end(args); | |
1984 | return ret; | |
1985 | } | |
9fbc61f8 | 1986 | |
3a42f4c7 | 1987 | int perf_pmu__scan_file_at(const struct perf_pmu *pmu, int dirfd, const char *name, |
3a69672e NK |
1988 | const char *fmt, ...) |
1989 | { | |
1990 | va_list args; | |
1991 | FILE *file; | |
1992 | int ret = EOF; | |
1993 | ||
1994 | va_start(args, fmt); | |
1995 | file = perf_pmu__open_file_at(pmu, dirfd, name); | |
1996 | if (file) { | |
1997 | ret = vfscanf(file, fmt, args); | |
1998 | fclose(file); | |
1999 | } | |
2000 | va_end(args); | |
2001 | return ret; | |
2002 | } | |
2003 | ||
3a42f4c7 | 2004 | bool perf_pmu__file_exists(const struct perf_pmu *pmu, const char *name) |
c2b6a896 GG |
2005 | { |
2006 | char path[PATH_MAX]; | |
2007 | ||
2008 | if (!perf_pmu__pathname_scnprintf(path, sizeof(path), pmu->name, name)) | |
2009 | return false; | |
2010 | ||
2011 | return file_available(path); | |
2012 | } | |
2013 | ||
9fbc61f8 KL |
2014 | static int perf_pmu__new_caps(struct list_head *list, char *name, char *value) |
2015 | { | |
2016 | struct perf_pmu_caps *caps = zalloc(sizeof(*caps)); | |
2017 | ||
2018 | if (!caps) | |
2019 | return -ENOMEM; | |
2020 | ||
2021 | caps->name = strdup(name); | |
2022 | if (!caps->name) | |
2023 | goto free_caps; | |
2024 | caps->value = strndup(value, strlen(value) - 1); | |
2025 | if (!caps->value) | |
2026 | goto free_name; | |
2027 | list_add_tail(&caps->list, list); | |
2028 | return 0; | |
2029 | ||
2030 | free_name: | |
57f14b5a | 2031 | zfree(&caps->name); |
9fbc61f8 KL |
2032 | free_caps: |
2033 | free(caps); | |
2034 | ||
2035 | return -ENOMEM; | |
2036 | } | |
2037 | ||
eec11310 NK |
2038 | static void perf_pmu__del_caps(struct perf_pmu *pmu) |
2039 | { | |
2040 | struct perf_pmu_caps *caps, *tmp; | |
2041 | ||
2042 | list_for_each_entry_safe(caps, tmp, &pmu->caps, list) { | |
2043 | list_del(&caps->list); | |
efe98a7a ACM |
2044 | zfree(&caps->name); |
2045 | zfree(&caps->value); | |
eec11310 NK |
2046 | free(caps); |
2047 | } | |
2048 | } | |
2049 | ||
9fbc61f8 KL |
2050 | /* |
2051 | * Reading/parsing the given pmu capabilities, which should be located at: | |
2052 | * /sys/bus/event_source/devices/<dev>/caps as sysfs group attributes. | |
2053 | * Return the number of capabilities | |
2054 | */ | |
2055 | int perf_pmu__caps_parse(struct perf_pmu *pmu) | |
2056 | { | |
2057 | struct stat st; | |
2058 | char caps_path[PATH_MAX]; | |
9fbc61f8 KL |
2059 | DIR *caps_dir; |
2060 | struct dirent *evt_ent; | |
b39094d3 | 2061 | int caps_fd; |
3339ec44 RB |
2062 | |
2063 | if (pmu->caps_initialized) | |
2064 | return pmu->nr_caps; | |
2065 | ||
2066 | pmu->nr_caps = 0; | |
9fbc61f8 | 2067 | |
f8ad6018 | 2068 | if (!perf_pmu__pathname_scnprintf(caps_path, sizeof(caps_path), pmu->name, "caps")) |
9fbc61f8 KL |
2069 | return -1; |
2070 | ||
3339ec44 RB |
2071 | if (stat(caps_path, &st) < 0) { |
2072 | pmu->caps_initialized = true; | |
9fbc61f8 | 2073 | return 0; /* no error if caps does not exist */ |
3339ec44 | 2074 | } |
9fbc61f8 KL |
2075 | |
2076 | caps_dir = opendir(caps_path); | |
2077 | if (!caps_dir) | |
2078 | return -EINVAL; | |
2079 | ||
b39094d3 NK |
2080 | caps_fd = dirfd(caps_dir); |
2081 | ||
9fbc61f8 | 2082 | while ((evt_ent = readdir(caps_dir)) != NULL) { |
9fbc61f8 KL |
2083 | char *name = evt_ent->d_name; |
2084 | char value[128]; | |
2085 | FILE *file; | |
b39094d3 | 2086 | int fd; |
9fbc61f8 KL |
2087 | |
2088 | if (!strcmp(name, ".") || !strcmp(name, "..")) | |
2089 | continue; | |
2090 | ||
b39094d3 | 2091 | fd = openat(caps_fd, name, O_RDONLY); |
0ea8920e IR |
2092 | if (fd == -1) |
2093 | continue; | |
b39094d3 | 2094 | file = fdopen(fd, "r"); |
0ea8920e IR |
2095 | if (!file) { |
2096 | close(fd); | |
9fbc61f8 | 2097 | continue; |
0ea8920e | 2098 | } |
9fbc61f8 KL |
2099 | |
2100 | if (!fgets(value, sizeof(value), file) || | |
2101 | (perf_pmu__new_caps(&pmu->caps, name, value) < 0)) { | |
2102 | fclose(file); | |
2103 | continue; | |
2104 | } | |
2105 | ||
3339ec44 | 2106 | pmu->nr_caps++; |
9fbc61f8 KL |
2107 | fclose(file); |
2108 | } | |
2109 | ||
2110 | closedir(caps_dir); | |
2111 | ||
3339ec44 RB |
2112 | pmu->caps_initialized = true; |
2113 | return pmu->nr_caps; | |
9fbc61f8 | 2114 | } |
e4064776 | 2115 | |
b9f01032 | 2116 | static void perf_pmu__compute_config_masks(struct perf_pmu *pmu) |
e4064776 JY |
2117 | { |
2118 | struct perf_pmu_format *format; | |
b9f01032 IR |
2119 | |
2120 | if (pmu->config_masks_computed) | |
2121 | return; | |
e4064776 JY |
2122 | |
2123 | list_for_each_entry(format, &pmu->format, list) { | |
b9f01032 IR |
2124 | unsigned int i; |
2125 | __u64 *mask; | |
2126 | ||
2127 | if (format->value >= PERF_PMU_FORMAT_VALUE_CONFIG_END) | |
e4064776 JY |
2128 | continue; |
2129 | ||
b9f01032 IR |
2130 | pmu->config_masks_present = true; |
2131 | mask = &pmu->config_masks[format->value]; | |
2132 | ||
e4064776 | 2133 | for_each_set_bit(i, format->bits, PERF_PMU_FORMAT_BITS) |
b9f01032 | 2134 | *mask |= 1ULL << i; |
e4064776 | 2135 | } |
b9f01032 IR |
2136 | pmu->config_masks_computed = true; |
2137 | } | |
2138 | ||
2139 | void perf_pmu__warn_invalid_config(struct perf_pmu *pmu, __u64 config, | |
2140 | const char *name, int config_num, | |
2141 | const char *config_name) | |
2142 | { | |
2143 | __u64 bits; | |
2144 | char buf[100]; | |
2145 | ||
2146 | perf_pmu__compute_config_masks(pmu); | |
e4064776 JY |
2147 | |
2148 | /* | |
2149 | * Kernel doesn't export any valid format bits. | |
2150 | */ | |
b9f01032 | 2151 | if (!pmu->config_masks_present) |
e4064776 JY |
2152 | return; |
2153 | ||
b9f01032 | 2154 | bits = config & ~pmu->config_masks[config_num]; |
e4064776 JY |
2155 | if (bits == 0) |
2156 | return; | |
2157 | ||
2158 | bitmap_scnprintf((unsigned long *)&bits, sizeof(bits) * 8, buf, sizeof(buf)); | |
2159 | ||
b9f01032 | 2160 | pr_warning("WARNING: event '%s' not valid (bits %s of %s " |
e4064776 | 2161 | "'%llx' not supported by kernel)!\n", |
b9f01032 | 2162 | name ?: "N/A", buf, config_name, config); |
e4064776 | 2163 | } |
c5a26ea4 | 2164 | |
f91fa2ae | 2165 | bool perf_pmu__match(const struct perf_pmu *pmu, const char *tok) |
c47a5599 | 2166 | { |
f91fa2ae | 2167 | const char *name = pmu->name; |
3e0bf9fd | 2168 | bool need_fnmatch = strisglob(tok); |
13d60ba0 | 2169 | |
f91fa2ae IR |
2170 | if (!strncmp(tok, "uncore_", 7)) |
2171 | tok += 7; | |
2172 | if (!strncmp(name, "uncore_", 7)) | |
2173 | name += 7; | |
c47a5599 | 2174 | |
f91fa2ae IR |
2175 | if (perf_pmu__match_ignoring_suffix(name, tok) || |
2176 | (need_fnmatch && !fnmatch(tok, name, 0))) | |
2177 | return true; | |
c47a5599 | 2178 | |
f91fa2ae IR |
2179 | name = pmu->alias_name; |
2180 | if (!name) | |
2181 | return false; | |
2182 | ||
2183 | if (!strncmp(name, "uncore_", 7)) | |
2184 | name += 7; | |
2185 | ||
2186 | return perf_pmu__match_ignoring_suffix(name, tok) || | |
2187 | (need_fnmatch && !fnmatch(tok, name, 0)); | |
c47a5599 | 2188 | } |
1d3351e6 | 2189 | |
acef233b JZ |
2190 | double __weak perf_pmu__cpu_slots_per_cycle(void) |
2191 | { | |
2192 | return NAN; | |
2193 | } | |
f8ad6018 JC |
2194 | |
2195 | int perf_pmu__event_source_devices_scnprintf(char *pathname, size_t size) | |
2196 | { | |
2197 | const char *sysfs = sysfs__mountpoint(); | |
2198 | ||
2199 | if (!sysfs) | |
2200 | return 0; | |
2201 | return scnprintf(pathname, size, "%s/bus/event_source/devices/", sysfs); | |
2202 | } | |
2203 | ||
e293a5e8 NK |
2204 | int perf_pmu__event_source_devices_fd(void) |
2205 | { | |
2206 | char path[PATH_MAX]; | |
2207 | const char *sysfs = sysfs__mountpoint(); | |
2208 | ||
2209 | if (!sysfs) | |
2210 | return -1; | |
2211 | ||
2212 | scnprintf(path, sizeof(path), "%s/bus/event_source/devices/", sysfs); | |
2213 | return open(path, O_DIRECTORY); | |
2214 | } | |
2215 | ||
f8ad6018 JC |
2216 | /* |
2217 | * Fill 'buf' with the path to a file or folder in 'pmu_name' in | |
2218 | * sysfs. For example if pmu_name = "cs_etm" and 'filename' = "format" | |
2219 | * then pathname will be filled with | |
2220 | * "/sys/bus/event_source/devices/cs_etm/format" | |
2221 | * | |
e1a3aad3 IR |
2222 | * Return 0 if the sysfs mountpoint couldn't be found, if no characters were |
2223 | * written or if the buffer size is exceeded. | |
f8ad6018 JC |
2224 | */ |
2225 | int perf_pmu__pathname_scnprintf(char *buf, size_t size, | |
2226 | const char *pmu_name, const char *filename) | |
2227 | { | |
e1a3aad3 | 2228 | size_t len; |
f8ad6018 | 2229 | |
e1a3aad3 IR |
2230 | len = perf_pmu__event_source_devices_scnprintf(buf, size); |
2231 | if (!len || (len + strlen(pmu_name) + strlen(filename) + 1) >= size) | |
f8ad6018 | 2232 | return 0; |
e1a3aad3 IR |
2233 | |
2234 | return scnprintf(buf + len, size - len, "%s/%s", pmu_name, filename); | |
f8ad6018 | 2235 | } |
eec11310 | 2236 | |
e293a5e8 NK |
2237 | int perf_pmu__pathname_fd(int dirfd, const char *pmu_name, const char *filename, int flags) |
2238 | { | |
2239 | char path[PATH_MAX]; | |
2240 | ||
2241 | scnprintf(path, sizeof(path), "%s/%s", pmu_name, filename); | |
2242 | return openat(dirfd, path, flags); | |
2243 | } | |
2244 | ||
1eaf496e | 2245 | void perf_pmu__delete(struct perf_pmu *pmu) |
eec11310 NK |
2246 | { |
2247 | perf_pmu__del_formats(&pmu->format); | |
2248 | perf_pmu__del_aliases(pmu); | |
2249 | perf_pmu__del_caps(pmu); | |
2250 | ||
2251 | perf_cpu_map__put(pmu->cpus); | |
2252 | ||
efe98a7a ACM |
2253 | zfree(&pmu->name); |
2254 | zfree(&pmu->alias_name); | |
b7823045 | 2255 | zfree(&pmu->id); |
eec11310 NK |
2256 | free(pmu); |
2257 | } | |
67ee8e71 IR |
2258 | |
2259 | const char *perf_pmu__name_from_config(struct perf_pmu *pmu, u64 config) | |
2260 | { | |
2261 | struct perf_pmu_alias *event; | |
2262 | ||
2263 | if (!pmu) | |
2264 | return NULL; | |
2265 | ||
7b6dd7a9 | 2266 | pmu_aliases_parse(pmu); |
67ee8e71 IR |
2267 | pmu_add_cpu_aliases(pmu); |
2268 | list_for_each_entry(event, &pmu->aliases, list) { | |
2269 | struct perf_event_attr attr = {.config = 0,}; | |
2270 | int ret = perf_pmu__config(pmu, &attr, &event->terms, NULL); | |
2271 | ||
2272 | if (ret == 0 && config == attr.config) | |
2273 | return event->name; | |
2274 | } | |
2275 | return NULL; | |
2276 | } |