2 #include <linux/list.h>
11 #include "parse-events.h"
14 #define EVENT_SOURCE_DEVICE_PATH "/bus/event_source/devices/"
16 int perf_pmu_parse(struct list_head
*list
, char *name
);
17 extern FILE *perf_pmu_in
;
19 static LIST_HEAD(pmus
);
22 * Parse & process all the sysfs attributes located under
23 * the directory specified in 'dir' parameter.
25 int perf_pmu__format_parse(char *dir
, struct list_head
*head
)
27 struct dirent
*evt_ent
;
31 format_dir
= opendir(dir
);
35 while (!ret
&& (evt_ent
= readdir(format_dir
))) {
37 char *name
= evt_ent
->d_name
;
40 if (!strcmp(name
, ".") || !strcmp(name
, ".."))
43 snprintf(path
, PATH_MAX
, "%s/%s", dir
, name
);
46 file
= fopen(path
, "r");
51 ret
= perf_pmu_parse(head
, name
);
60 * Reading/parsing the default pmu format definition, which should be
62 * /sys/bus/event_source/devices/<dev>/format as sysfs group attributes.
64 static int pmu_format(char *name
, struct list_head
*format
)
70 sysfs
= sysfs_find_mountpoint();
74 snprintf(path
, PATH_MAX
,
75 "%s" EVENT_SOURCE_DEVICE_PATH
"%s/format", sysfs
, name
);
77 if (stat(path
, &st
) < 0)
78 return 0; /* no error if format does not exist */
80 if (perf_pmu__format_parse(path
, format
))
86 static int perf_pmu__new_alias(struct list_head
*list
, char *name
, FILE *file
)
88 struct perf_pmu__alias
*alias
;
92 ret
= fread(buf
, 1, sizeof(buf
), file
);
97 alias
= malloc(sizeof(*alias
));
101 INIT_LIST_HEAD(&alias
->terms
);
102 ret
= parse_events_terms(&alias
->terms
, buf
);
108 alias
->name
= strdup(name
);
109 list_add_tail(&alias
->list
, list
);
114 * Process all the sysfs attributes located under the directory
115 * specified in 'dir' parameter.
117 static int pmu_aliases_parse(char *dir
, struct list_head
*head
)
119 struct dirent
*evt_ent
;
123 event_dir
= opendir(dir
);
127 while (!ret
&& (evt_ent
= readdir(event_dir
))) {
129 char *name
= evt_ent
->d_name
;
132 if (!strcmp(name
, ".") || !strcmp(name
, ".."))
135 snprintf(path
, PATH_MAX
, "%s/%s", dir
, name
);
138 file
= fopen(path
, "r");
141 ret
= perf_pmu__new_alias(head
, name
, file
);
150 * Reading the pmu event aliases definition, which should be located at:
151 * /sys/bus/event_source/devices/<dev>/events as sysfs group attributes.
153 static int pmu_aliases(char *name
, struct list_head
*head
)
159 sysfs
= sysfs_find_mountpoint();
163 snprintf(path
, PATH_MAX
,
164 "%s/bus/event_source/devices/%s/events", sysfs
, name
);
166 if (stat(path
, &st
) < 0)
167 return 0; /* no error if 'events' does not exist */
169 if (pmu_aliases_parse(path
, head
))
175 static int pmu_alias_terms(struct perf_pmu__alias
*alias
,
176 struct list_head
*terms
)
178 struct parse_events__term
*term
, *clone
;
182 list_for_each_entry(term
, &alias
->terms
, list
) {
183 ret
= parse_events__term_clone(&clone
, term
);
185 parse_events__free_terms(&list
);
188 list_add_tail(&clone
->list
, &list
);
190 list_splice(&list
, terms
);
195 * Reading/parsing the default pmu type value, which should be
197 * /sys/bus/event_source/devices/<dev>/type as sysfs attribute.
199 static int pmu_type(char *name
, __u32
*type
)
207 sysfs
= sysfs_find_mountpoint();
211 snprintf(path
, PATH_MAX
,
212 "%s" EVENT_SOURCE_DEVICE_PATH
"%s/type", sysfs
, name
);
214 if (stat(path
, &st
) < 0)
217 file
= fopen(path
, "r");
221 if (1 != fscanf(file
, "%u", type
))
228 /* Add all pmus in sysfs to pmu list: */
229 static void pmu_read_sysfs(void)
236 sysfs
= sysfs_find_mountpoint();
240 snprintf(path
, PATH_MAX
,
241 "%s" EVENT_SOURCE_DEVICE_PATH
, sysfs
);
247 while ((dent
= readdir(dir
))) {
248 if (!strcmp(dent
->d_name
, ".") || !strcmp(dent
->d_name
, ".."))
250 /* add to static LIST_HEAD(pmus): */
251 perf_pmu__find(dent
->d_name
);
257 static struct cpu_map
*pmu_cpumask(char *name
)
263 struct cpu_map
*cpus
;
265 sysfs
= sysfs_find_mountpoint();
269 snprintf(path
, PATH_MAX
,
270 "%s/bus/event_source/devices/%s/cpumask", sysfs
, name
);
272 if (stat(path
, &st
) < 0)
275 file
= fopen(path
, "r");
279 cpus
= cpu_map__read(file
);
284 static struct perf_pmu
*pmu_lookup(char *name
)
286 struct perf_pmu
*pmu
;
292 * The pmu data we store & need consists of the pmu
293 * type value and format definitions. Load both right
296 if (pmu_format(name
, &format
))
299 if (pmu_aliases(name
, &aliases
))
302 if (pmu_type(name
, &type
))
305 pmu
= zalloc(sizeof(*pmu
));
309 pmu
->cpus
= pmu_cpumask(name
);
311 INIT_LIST_HEAD(&pmu
->format
);
312 INIT_LIST_HEAD(&pmu
->aliases
);
313 list_splice(&format
, &pmu
->format
);
314 list_splice(&aliases
, &pmu
->aliases
);
315 pmu
->name
= strdup(name
);
317 list_add_tail(&pmu
->list
, &pmus
);
321 static struct perf_pmu
*pmu_find(char *name
)
323 struct perf_pmu
*pmu
;
325 list_for_each_entry(pmu
, &pmus
, list
)
326 if (!strcmp(pmu
->name
, name
))
332 struct perf_pmu
*perf_pmu__scan(struct perf_pmu
*pmu
)
335 * pmu iterator: If pmu is NULL, we start at the begin,
336 * otherwise return the next pmu. Returns NULL on end.
340 pmu
= list_prepare_entry(pmu
, &pmus
, list
);
342 list_for_each_entry_continue(pmu
, &pmus
, list
)
347 struct perf_pmu
*perf_pmu__find(char *name
)
349 struct perf_pmu
*pmu
;
352 * Once PMU is loaded it stays in the list,
353 * so we keep us from multiple reading/parsing
354 * the pmu format definitions.
356 pmu
= pmu_find(name
);
360 return pmu_lookup(name
);
363 static struct perf_pmu__format
*
364 pmu_find_format(struct list_head
*formats
, char *name
)
366 struct perf_pmu__format
*format
;
368 list_for_each_entry(format
, formats
, list
)
369 if (!strcmp(format
->name
, name
))
376 * Returns value based on the format definition (format parameter)
377 * and unformated value (value parameter).
379 * TODO maybe optimize a little ;)
381 static __u64
pmu_format_value(unsigned long *format
, __u64 value
)
383 unsigned long fbit
, vbit
;
386 for (fbit
= 0, vbit
= 0; fbit
< PERF_PMU_FORMAT_BITS
; fbit
++) {
388 if (!test_bit(fbit
, format
))
391 if (!(value
& (1llu << vbit
++)))
401 * Setup one of config[12] attr members based on the
402 * user input data - temr parameter.
404 static int pmu_config_term(struct list_head
*formats
,
405 struct perf_event_attr
*attr
,
406 struct parse_events__term
*term
)
408 struct perf_pmu__format
*format
;
412 * Support only for hardcoded and numnerial terms.
413 * Hardcoded terms should be already in, so nothing
414 * to be done for them.
416 if (parse_events__is_hardcoded_term(term
))
419 if (term
->type_val
!= PARSE_EVENTS__TERM_TYPE_NUM
)
422 format
= pmu_find_format(formats
, term
->config
);
426 switch (format
->value
) {
427 case PERF_PMU_FORMAT_VALUE_CONFIG
:
430 case PERF_PMU_FORMAT_VALUE_CONFIG1
:
433 case PERF_PMU_FORMAT_VALUE_CONFIG2
:
441 * XXX If we ever decide to go with string values for
442 * non-hardcoded terms, here's the place to translate
445 *vp
|= pmu_format_value(format
->bits
, term
->val
.num
);
449 int perf_pmu__config_terms(struct list_head
*formats
,
450 struct perf_event_attr
*attr
,
451 struct list_head
*head_terms
)
453 struct parse_events__term
*term
;
455 list_for_each_entry(term
, head_terms
, list
)
456 if (pmu_config_term(formats
, attr
, term
))
463 * Configures event's 'attr' parameter based on the:
464 * 1) users input - specified in terms parameter
465 * 2) pmu format definitions - specified by pmu parameter
467 int perf_pmu__config(struct perf_pmu
*pmu
, struct perf_event_attr
*attr
,
468 struct list_head
*head_terms
)
470 attr
->type
= pmu
->type
;
471 return perf_pmu__config_terms(&pmu
->format
, attr
, head_terms
);
474 static struct perf_pmu__alias
*pmu_find_alias(struct perf_pmu
*pmu
,
475 struct parse_events__term
*term
)
477 struct perf_pmu__alias
*alias
;
480 if (parse_events__is_hardcoded_term(term
))
483 if (term
->type_val
== PARSE_EVENTS__TERM_TYPE_NUM
) {
484 if (term
->val
.num
!= 1)
486 if (pmu_find_format(&pmu
->format
, term
->config
))
489 } else if (term
->type_val
== PARSE_EVENTS__TERM_TYPE_STR
) {
490 if (strcasecmp(term
->config
, "event"))
492 name
= term
->val
.str
;
497 list_for_each_entry(alias
, &pmu
->aliases
, list
) {
498 if (!strcasecmp(alias
->name
, name
))
505 * Find alias in the terms list and replace it with the terms
506 * defined for the alias
508 int perf_pmu__check_alias(struct perf_pmu
*pmu
, struct list_head
*head_terms
)
510 struct parse_events__term
*term
, *h
;
511 struct perf_pmu__alias
*alias
;
514 list_for_each_entry_safe(term
, h
, head_terms
, list
) {
515 alias
= pmu_find_alias(pmu
, term
);
518 ret
= pmu_alias_terms(alias
, &term
->list
);
521 list_del(&term
->list
);
527 int perf_pmu__new_format(struct list_head
*list
, char *name
,
528 int config
, unsigned long *bits
)
530 struct perf_pmu__format
*format
;
532 format
= zalloc(sizeof(*format
));
536 format
->name
= strdup(name
);
537 format
->value
= config
;
538 memcpy(format
->bits
, bits
, sizeof(format
->bits
));
540 list_add_tail(&format
->list
, list
);
544 void perf_pmu__set_format(unsigned long *bits
, long from
, long to
)
551 memset(bits
, 0, BITS_TO_LONGS(PERF_PMU_FORMAT_BITS
));
552 for (b
= from
; b
<= to
; b
++)