1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/list.h>
3 #include <linux/compiler.h>
4 #include <linux/string.h>
5 #include <linux/zalloc.h>
6 #include <linux/ctype.h>
14 #include <api/fs/fs.h>
22 #include "pmu-bison.h"
24 #include "parse-events.h"
25 #include "print-events.h"
30 #include "util/evsel_config.h"
32 struct perf_pmu perf_pmu__fake;
35 * struct perf_pmu_format - Values from a format file read from
36 * <sysfs>/devices/cpu/format/ held in struct perf_pmu.
38 * For example, the contents of <sysfs>/devices/cpu/format/event may be
39 * "config:0-7" and will be represented here as name="event",
40 * value=PERF_PMU_FORMAT_VALUE_CONFIG and bits 0 to 7 will be set.
42 struct perf_pmu_format {
43 /** @name: The modifier/file name. */
46 * @value : Which config value the format relates to. Supported values
47 * are from PERF_PMU_FORMAT_VALUE_CONFIG to
48 * PERF_PMU_FORMAT_VALUE_CONFIG_END.
51 /** @bits: Which config bits are set by this format value. */
52 DECLARE_BITMAP(bits, PERF_PMU_FORMAT_BITS);
53 /** @list: Element on list within struct perf_pmu. */
54 struct list_head list;
58 * Parse & process all the sysfs attributes located under
59 * the directory specified in 'dir' parameter.
61 int perf_pmu__format_parse(int dirfd, struct list_head *head)
63 struct dirent *evt_ent;
67 format_dir = fdopendir(dirfd);
71 while (!ret && (evt_ent = readdir(format_dir))) {
72 char *name = evt_ent->d_name;
77 if (!strcmp(name, ".") || !strcmp(name, ".."))
82 fd = openat(dirfd, name, O_RDONLY);
86 file = fdopen(fd, "r");
92 ret = perf_pmu_lex_init(&scanner);
98 perf_pmu_set_in(file, scanner);
99 ret = perf_pmu_parse(head, name, scanner);
100 perf_pmu_lex_destroy(scanner);
104 closedir(format_dir);
109 * Reading/parsing the default pmu format definition, which should be
111 * /sys/bus/event_source/devices/<dev>/format as sysfs group attributes.
113 static int pmu_format(int dirfd, const char *name, struct list_head *format)
117 fd = perf_pmu__pathname_fd(dirfd, name, "format", O_DIRECTORY);
121 /* it'll close the fd */
122 if (perf_pmu__format_parse(fd, format))
128 int perf_pmu__convert_scale(const char *scale, char **end, double *sval)
134 * save current locale
136 lc = setlocale(LC_NUMERIC, NULL);
139 * The lc string may be allocated in static storage,
140 * so get a dynamic copy to make it survive setlocale
150 * force to C locale to ensure kernel
151 * scale string is converted correctly.
152 * kernel uses default C locale.
154 setlocale(LC_NUMERIC, "C");
156 *sval = strtod(scale, end);
160 setlocale(LC_NUMERIC, lc);
165 static int perf_pmu__parse_scale(struct perf_pmu_alias *alias, int dirfd, char *name)
173 scnprintf(path, PATH_MAX, "%s.scale", name);
175 fd = openat(dirfd, path, O_RDONLY);
179 if (fstat(fd, &st) < 0)
182 sret = read(fd, scale, sizeof(scale)-1);
186 if (scale[sret - 1] == '\n')
187 scale[sret - 1] = '\0';
191 ret = perf_pmu__convert_scale(scale, NULL, &alias->scale);
197 static int perf_pmu__parse_unit(struct perf_pmu_alias *alias, int dirfd, char *name)
203 scnprintf(path, PATH_MAX, "%s.unit", name);
205 fd = openat(dirfd, path, O_RDONLY);
209 sret = read(fd, alias->unit, UNIT_MAX_LEN);
215 if (alias->unit[sret - 1] == '\n')
216 alias->unit[sret - 1] = '\0';
218 alias->unit[sret] = '\0';
223 alias->unit[0] = '\0';
228 perf_pmu__parse_per_pkg(struct perf_pmu_alias *alias, int dirfd, char *name)
233 scnprintf(path, PATH_MAX, "%s.per-pkg", name);
235 fd = openat(dirfd, path, O_RDONLY);
241 alias->per_pkg = true;
245 static int perf_pmu__parse_snapshot(struct perf_pmu_alias *alias,
246 int dirfd, char *name)
251 scnprintf(path, PATH_MAX, "%s.snapshot", name);
253 fd = openat(dirfd, path, O_RDONLY);
257 alias->snapshot = true;
262 static void perf_pmu_assign_str(char *name, const char *field, char **old_str,
268 if (*new_str) { /* Have new string, check with old */
269 if (strcasecmp(*old_str, *new_str))
270 pr_debug("alias %s differs in field '%s'\n",
273 } else /* Nothing new --> keep old string */
280 static void perf_pmu_update_alias(struct perf_pmu_alias *old,
281 struct perf_pmu_alias *newalias)
283 perf_pmu_assign_str(old->name, "desc", &old->desc, &newalias->desc);
284 perf_pmu_assign_str(old->name, "long_desc", &old->long_desc,
285 &newalias->long_desc);
286 perf_pmu_assign_str(old->name, "topic", &old->topic, &newalias->topic);
287 perf_pmu_assign_str(old->name, "value", &old->str, &newalias->str);
288 old->scale = newalias->scale;
289 old->per_pkg = newalias->per_pkg;
290 old->snapshot = newalias->snapshot;
291 memcpy(old->unit, newalias->unit, sizeof(old->unit));
294 /* Delete an alias entry. */
295 void perf_pmu_free_alias(struct perf_pmu_alias *newalias)
297 zfree(&newalias->name);
298 zfree(&newalias->desc);
299 zfree(&newalias->long_desc);
300 zfree(&newalias->topic);
301 zfree(&newalias->str);
302 zfree(&newalias->pmu_name);
303 parse_events_terms__purge(&newalias->terms);
307 static void perf_pmu__del_aliases(struct perf_pmu *pmu)
309 struct perf_pmu_alias *alias, *tmp;
311 list_for_each_entry_safe(alias, tmp, &pmu->aliases, list) {
312 list_del(&alias->list);
313 perf_pmu_free_alias(alias);
317 /* Merge an alias, search in alias list. If this name is already
318 * present merge both of them to combine all information.
320 static bool perf_pmu_merge_alias(struct perf_pmu_alias *newalias,
321 struct list_head *alist)
323 struct perf_pmu_alias *a;
325 list_for_each_entry(a, alist, list) {
326 if (!strcasecmp(newalias->name, a->name)) {
327 if (newalias->pmu_name && a->pmu_name &&
328 !strcasecmp(newalias->pmu_name, a->pmu_name)) {
331 perf_pmu_update_alias(a, newalias);
332 perf_pmu_free_alias(newalias);
339 static int __perf_pmu__new_alias(struct list_head *list, int dirfd, char *name,
340 char *desc, char *val, const struct pmu_event *pe)
342 struct parse_events_term *term;
343 struct perf_pmu_alias *alias;
346 const char *long_desc = NULL, *topic = NULL, *unit = NULL, *pmu_name = NULL;
347 bool deprecated = false, perpkg = false;
350 long_desc = pe->long_desc;
354 deprecated = pe->deprecated;
358 alias = malloc(sizeof(*alias));
362 INIT_LIST_HEAD(&alias->terms);
364 alias->unit[0] = '\0';
365 alias->per_pkg = perpkg;
366 alias->snapshot = false;
367 alias->deprecated = deprecated;
369 ret = parse_events_terms(&alias->terms, val);
371 pr_err("Cannot parse alias %s: %d\n", val, ret);
376 /* Scan event and remove leading zeroes, spaces, newlines, some
377 * platforms have terms specified as
378 * event=0x0091 (read from files ../<PMU>/events/<FILE>
379 * and terms specified as event=0x91 (read from JSON files).
381 * Rebuild string to make alias->str member comparable.
383 memset(newval, 0, sizeof(newval));
385 list_for_each_entry(term, &alias->terms, list) {
387 ret += scnprintf(newval + ret, sizeof(newval) - ret,
389 if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM)
390 ret += scnprintf(newval + ret, sizeof(newval) - ret,
391 "%s=%#x", term->config, term->val.num);
392 else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR)
393 ret += scnprintf(newval + ret, sizeof(newval) - ret,
394 "%s=%s", term->config, term->val.str);
397 alias->name = strdup(name);
400 * load unit name and scale if available
402 perf_pmu__parse_unit(alias, dirfd, name);
403 perf_pmu__parse_scale(alias, dirfd, name);
404 perf_pmu__parse_per_pkg(alias, dirfd, name);
405 perf_pmu__parse_snapshot(alias, dirfd, name);
408 alias->desc = desc ? strdup(desc) : NULL;
409 alias->long_desc = long_desc ? strdup(long_desc) :
410 desc ? strdup(desc) : NULL;
411 alias->topic = topic ? strdup(topic) : NULL;
413 if (perf_pmu__convert_scale(unit, (char **)&unit, &alias->scale) < 0)
415 snprintf(alias->unit, sizeof(alias->unit), "%s", unit);
417 alias->str = strdup(newval);
418 alias->pmu_name = pmu_name ? strdup(pmu_name) : NULL;
420 if (!perf_pmu_merge_alias(alias, list))
421 list_add_tail(&alias->list, list);
426 static int perf_pmu__new_alias(struct list_head *list, int dirfd, char *name, FILE *file)
431 ret = fread(buf, 1, sizeof(buf), file);
437 /* Remove trailing newline from sysfs file */
440 return __perf_pmu__new_alias(list, dirfd, name, NULL, buf, NULL);
443 static inline bool pmu_alias_info_file(char *name)
448 if (len > 5 && !strcmp(name + len - 5, ".unit"))
450 if (len > 6 && !strcmp(name + len - 6, ".scale"))
452 if (len > 8 && !strcmp(name + len - 8, ".per-pkg"))
454 if (len > 9 && !strcmp(name + len - 9, ".snapshot"))
461 * Process all the sysfs attributes located under the directory
462 * specified in 'dir' parameter.
464 static int pmu_aliases_parse(int dirfd, struct list_head *head)
466 struct dirent *evt_ent;
470 event_dir = fdopendir(dirfd);
474 while ((evt_ent = readdir(event_dir))) {
475 char *name = evt_ent->d_name;
478 if (!strcmp(name, ".") || !strcmp(name, ".."))
482 * skip info files parsed in perf_pmu__new_alias()
484 if (pmu_alias_info_file(name))
487 fd = openat(dirfd, name, O_RDONLY);
489 pr_debug("Cannot open %s\n", name);
492 file = fdopen(fd, "r");
498 if (perf_pmu__new_alias(head, dirfd, name, file) < 0)
499 pr_debug("Cannot set up %s\n", name);
508 * Reading the pmu event aliases definition, which should be located at:
509 * /sys/bus/event_source/devices/<dev>/events as sysfs group attributes.
511 static int pmu_aliases(int dirfd, const char *name, struct list_head *head)
515 fd = perf_pmu__pathname_fd(dirfd, name, "events", O_DIRECTORY);
519 /* it'll close the fd */
520 if (pmu_aliases_parse(fd, head))
526 static int pmu_alias_terms(struct perf_pmu_alias *alias,
527 struct list_head *terms)
529 struct parse_events_term *term, *cloned;
533 list_for_each_entry(term, &alias->terms, list) {
534 ret = parse_events_term__clone(&cloned, term);
536 parse_events_terms__purge(&list);
540 * Weak terms don't override command line options,
541 * which we don't want for implicit terms in aliases.
544 list_add_tail(&cloned->list, &list);
546 list_splice(&list, terms);
551 * Uncore PMUs have a "cpumask" file under sysfs. CPU PMUs (e.g. on arm/arm64)
552 * may have a "cpus" file.
554 static struct perf_cpu_map *pmu_cpumask(int dirfd, const char *name, bool is_core)
556 struct perf_cpu_map *cpus;
557 const char *templates[] = {
562 const char **template;
563 char pmu_name[PATH_MAX];
564 struct perf_pmu pmu = {.name = pmu_name};
567 strlcpy(pmu_name, name, sizeof(pmu_name));
568 for (template = templates; *template; template++) {
569 file = perf_pmu__open_file_at(&pmu, dirfd, *template);
572 cpus = perf_cpu_map__read(file);
578 /* Nothing found, for core PMUs assume this means all CPUs. */
579 return is_core ? perf_cpu_map__get(cpu_map__online()) : NULL;
582 static bool pmu_is_uncore(int dirfd, const char *name)
586 fd = perf_pmu__pathname_fd(dirfd, name, "cpumask", O_PATH);
594 static char *pmu_id(const char *name)
596 char path[PATH_MAX], *str;
599 perf_pmu__pathname_scnprintf(path, sizeof(path), name, "identifier");
601 if (filename__read_str(path, &str, &len) < 0)
604 str[len - 1] = 0; /* remove line feed */
610 * is_sysfs_pmu_core() - PMU CORE devices have different name other than cpu in
611 * sysfs on some platforms like ARM or Intel hybrid. Looking for
612 * possible the cpus file in sysfs files to identify whether this is a
614 * @name: The PMU name such as "cpu_atom".
616 static int is_sysfs_pmu_core(const char *name)
620 if (!perf_pmu__pathname_scnprintf(path, sizeof(path), name, "cpus"))
622 return file_available(path);
625 char *perf_pmu__getcpuid(struct perf_pmu *pmu)
630 cpuid = getenv("PERF_CPUID");
632 cpuid = strdup(cpuid);
634 cpuid = get_cpuid_str(pmu);
639 pr_debug("Using CPUID %s\n", cpuid);
645 __weak const struct pmu_events_table *pmu_events_table__find(void)
647 return perf_pmu__find_events_table(NULL);
650 __weak const struct pmu_metrics_table *pmu_metrics_table__find(void)
652 return perf_pmu__find_metrics_table(NULL);
656 * perf_pmu__match_ignoring_suffix - Does the pmu_name match tok ignoring any
657 * trailing suffix? The Suffix must be in form
658 * tok_{digits}, or tok{digits}.
659 * @pmu_name: The pmu_name with possible suffix.
660 * @tok: The possible match to pmu_name without suffix.
662 static bool perf_pmu__match_ignoring_suffix(const char *pmu_name, const char *tok)
666 if (strncmp(pmu_name, tok, strlen(tok)))
669 p = pmu_name + strlen(tok);
676 /* Ensure we end in a number */
688 * pmu_uncore_alias_match - does name match the PMU name?
689 * @pmu_name: the json struct pmu_event name. This may lack a suffix (which
690 * matches) or be of the form "socket,pmuname" which will match
691 * "socketX_pmunameY".
692 * @name: a real full PMU name as from sysfs.
694 static bool pmu_uncore_alias_match(const char *pmu_name, const char *name)
696 char *tmp = NULL, *tok, *str;
699 if (strchr(pmu_name, ',') == NULL)
700 return perf_pmu__match_ignoring_suffix(name, pmu_name);
702 str = strdup(pmu_name);
707 * uncore alias may be from different PMU with common prefix
709 tok = strtok_r(str, ",", &tmp);
710 if (strncmp(pmu_name, tok, strlen(tok))) {
716 * Match more complex aliases where the alias name is a comma-delimited
717 * list of tokens, orderly contained in the matching PMU name.
719 * Example: For alias "socket,pmuname" and PMU "socketX_pmunameY", we
720 * match "socket" in "socketX_pmunameY" and then "pmuname" in
724 char *next_tok = strtok_r(NULL, ",", &tmp);
726 name = strstr(name, tok);
728 (!next_tok && !perf_pmu__match_ignoring_suffix(name, tok))) {
744 struct pmu_add_cpu_aliases_map_data {
745 /* List being added to. */
746 struct list_head *head;
747 /* If a pmu_event lacks a given PMU the default used. */
748 char *default_pmu_name;
749 /* The PMU that we're searching for events for. */
750 struct perf_pmu *pmu;
753 static int pmu_add_cpu_aliases_map_callback(const struct pmu_event *pe,
754 const struct pmu_events_table *table __maybe_unused,
757 struct pmu_add_cpu_aliases_map_data *data = vdata;
758 const char *pname = pe->pmu ?: data->default_pmu_name;
760 if (!strcmp(pname, data->pmu->name) ||
761 (data->pmu->is_uncore && pmu_uncore_alias_match(pname, data->pmu->name))) {
762 /* need type casts to override 'const' */
763 __perf_pmu__new_alias(data->head, -1, (char *)pe->name, (char *)pe->desc,
764 (char *)pe->event, pe);
770 * From the pmu_events_table, find the events that correspond to the given
771 * PMU and add them to the list 'head'.
773 void pmu_add_cpu_aliases_table(struct list_head *head, struct perf_pmu *pmu,
774 const struct pmu_events_table *table)
776 struct pmu_add_cpu_aliases_map_data data = {
778 .default_pmu_name = perf_pmus__default_pmu_name(),
782 pmu_events_table_for_each_event(table, pmu_add_cpu_aliases_map_callback, &data);
783 free(data.default_pmu_name);
786 static void pmu_add_cpu_aliases(struct list_head *head, struct perf_pmu *pmu)
788 const struct pmu_events_table *table;
790 table = perf_pmu__find_events_table(pmu);
794 pmu_add_cpu_aliases_table(head, pmu, table);
797 struct pmu_sys_event_iter_data {
798 struct list_head *head;
799 struct perf_pmu *pmu;
802 static int pmu_add_sys_aliases_iter_fn(const struct pmu_event *pe,
803 const struct pmu_events_table *table __maybe_unused,
806 struct pmu_sys_event_iter_data *idata = data;
807 struct perf_pmu *pmu = idata->pmu;
809 if (!pe->compat || !pe->pmu)
812 if (!strcmp(pmu->id, pe->compat) &&
813 pmu_uncore_alias_match(pe->pmu, pmu->name)) {
814 __perf_pmu__new_alias(idata->head, -1,
824 void pmu_add_sys_aliases(struct list_head *head, struct perf_pmu *pmu)
826 struct pmu_sys_event_iter_data idata = {
834 pmu_for_each_sys_event(pmu_add_sys_aliases_iter_fn, &idata);
837 struct perf_event_attr * __weak
838 perf_pmu__get_default_config(struct perf_pmu *pmu __maybe_unused)
844 pmu_find_real_name(const char *name)
850 pmu_find_alias_name(const char *name __maybe_unused)
855 static int pmu_max_precise(int dirfd, struct perf_pmu *pmu)
857 int max_precise = -1;
859 perf_pmu__scan_file_at(pmu, dirfd, "caps/max_precise", "%d", &max_precise);
863 struct perf_pmu *perf_pmu__lookup(struct list_head *pmus, int dirfd, const char *lookup_name)
865 struct perf_pmu *pmu;
869 char *name = pmu_find_real_name(lookup_name);
873 * The pmu data we store & need consists of the pmu
874 * type value and format definitions. Load both right
877 if (pmu_format(dirfd, name, &format))
881 * Check the aliases first to avoid unnecessary work.
883 if (pmu_aliases(dirfd, name, &aliases))
886 pmu = zalloc(sizeof(*pmu));
890 pmu->is_core = is_pmu_core(name);
891 pmu->cpus = pmu_cpumask(dirfd, name, pmu->is_core);
892 pmu->name = strdup(name);
896 /* Read type, and ensure that type value is successfully assigned (return 1) */
897 if (perf_pmu__scan_file_at(pmu, dirfd, "type", "%u", &type) != 1)
900 alias_name = pmu_find_alias_name(name);
902 pmu->alias_name = strdup(alias_name);
903 if (!pmu->alias_name)
908 pmu->is_uncore = pmu_is_uncore(dirfd, name);
910 pmu->id = pmu_id(name);
911 pmu->max_precise = pmu_max_precise(dirfd, pmu);
912 pmu_add_cpu_aliases(&aliases, pmu);
913 pmu_add_sys_aliases(&aliases, pmu);
915 INIT_LIST_HEAD(&pmu->format);
916 INIT_LIST_HEAD(&pmu->aliases);
917 INIT_LIST_HEAD(&pmu->caps);
918 list_splice(&format, &pmu->format);
919 list_splice(&aliases, &pmu->aliases);
920 list_add_tail(&pmu->list, pmus);
922 pmu->default_config = perf_pmu__get_default_config(pmu);
931 void perf_pmu__warn_invalid_formats(struct perf_pmu *pmu)
933 struct perf_pmu_format *format;
935 if (pmu->formats_checked)
938 pmu->formats_checked = true;
940 /* fake pmu doesn't have format list */
941 if (pmu == &perf_pmu__fake)
944 list_for_each_entry(format, &pmu->format, list)
945 if (format->value >= PERF_PMU_FORMAT_VALUE_CONFIG_END) {
946 pr_warning("WARNING: '%s' format '%s' requires 'perf_event_attr::config%d'"
947 "which is not supported by this version of perf!\n",
948 pmu->name, format->name, format->value);
953 bool evsel__is_aux_event(const struct evsel *evsel)
955 struct perf_pmu *pmu = evsel__find_pmu(evsel);
957 return pmu && pmu->auxtrace;
961 * Set @config_name to @val as long as the user hasn't already set or cleared it
962 * by passing a config term on the command line.
964 * @val is the value to put into the bits specified by @config_name rather than
965 * the bit pattern. It is shifted into position by this function, so to set
966 * something to true, pass 1 for val rather than a pre shifted value.
968 #define field_prep(_mask, _val) (((_val) << (ffsll(_mask) - 1)) & (_mask))
969 void evsel__set_config_if_unset(struct perf_pmu *pmu, struct evsel *evsel,
970 const char *config_name, u64 val)
972 u64 user_bits = 0, bits;
973 struct evsel_config_term *term = evsel__get_config_term(evsel, CFG_CHG);
976 user_bits = term->val.cfg_chg;
978 bits = perf_pmu__format_bits(&pmu->format, config_name);
980 /* Do nothing if the user changed the value */
981 if (bits & user_bits)
984 /* Otherwise replace it */
985 evsel->core.attr.config &= ~bits;
986 evsel->core.attr.config |= field_prep(bits, val);
989 static struct perf_pmu_format *
990 pmu_find_format(struct list_head *formats, const char *name)
992 struct perf_pmu_format *format;
994 list_for_each_entry(format, formats, list)
995 if (!strcmp(format->name, name))
1001 __u64 perf_pmu__format_bits(struct list_head *formats, const char *name)
1003 struct perf_pmu_format *format = pmu_find_format(formats, name);
1010 for_each_set_bit(fbit, format->bits, PERF_PMU_FORMAT_BITS)
1011 bits |= 1ULL << fbit;
1016 int perf_pmu__format_type(struct list_head *formats, const char *name)
1018 struct perf_pmu_format *format = pmu_find_format(formats, name);
1023 return format->value;
1027 * Sets value based on the format definition (format parameter)
1028 * and unformatted value (value parameter).
1030 static void pmu_format_value(unsigned long *format, __u64 value, __u64 *v,
1033 unsigned long fbit, vbit;
1035 for (fbit = 0, vbit = 0; fbit < PERF_PMU_FORMAT_BITS; fbit++) {
1037 if (!test_bit(fbit, format))
1040 if (value & (1llu << vbit++))
1041 *v |= (1llu << fbit);
1043 *v &= ~(1llu << fbit);
1047 static __u64 pmu_format_max_value(const unsigned long *format)
1051 w = bitmap_weight(format, PERF_PMU_FORMAT_BITS);
1055 return (1ULL << w) - 1;
1060 * Term is a string term, and might be a param-term. Try to look up it's value
1061 * in the remaining terms.
1062 * - We have a term like "base-or-format-term=param-term",
1063 * - We need to find the value supplied for "param-term" (with param-term named
1064 * in a config string) later on in the term list.
1066 static int pmu_resolve_param_term(struct parse_events_term *term,
1067 struct list_head *head_terms,
1070 struct parse_events_term *t;
1072 list_for_each_entry(t, head_terms, list) {
1073 if (t->type_val == PARSE_EVENTS__TERM_TYPE_NUM &&
1074 t->config && !strcmp(t->config, term->config)) {
1076 *value = t->val.num;
1082 printf("Required parameter '%s' not specified\n", term->config);
1087 static char *pmu_formats_string(struct list_head *formats)
1089 struct perf_pmu_format *format;
1091 struct strbuf buf = STRBUF_INIT;
1097 /* sysfs exported terms */
1098 list_for_each_entry(format, formats, list)
1099 if (strbuf_addf(&buf, i++ ? ",%s" : "%s", format->name) < 0)
1102 str = strbuf_detach(&buf, NULL);
1104 strbuf_release(&buf);
1110 * Setup one of config[12] attr members based on the
1111 * user input data - term parameter.
1113 static int pmu_config_term(const char *pmu_name,
1114 struct list_head *formats,
1115 struct perf_event_attr *attr,
1116 struct parse_events_term *term,
1117 struct list_head *head_terms,
1118 bool zero, struct parse_events_error *err)
1120 struct perf_pmu_format *format;
1125 * If this is a parameter we've already used for parameterized-eval,
1126 * skip it in normal eval.
1132 * Hardcoded terms should be already in, so nothing
1133 * to be done for them.
1135 if (parse_events__is_hardcoded_term(term))
1138 format = pmu_find_format(formats, term->config);
1140 char *pmu_term = pmu_formats_string(formats);
1144 if (asprintf(&unknown_term,
1145 "unknown term '%s' for pmu '%s'",
1146 term->config, pmu_name) < 0)
1147 unknown_term = NULL;
1148 help_msg = parse_events_formats_error_string(pmu_term);
1150 parse_events_error__handle(err, term->err_term,
1154 pr_debug("%s (%s)\n", unknown_term, help_msg);
1161 switch (format->value) {
1162 case PERF_PMU_FORMAT_VALUE_CONFIG:
1165 case PERF_PMU_FORMAT_VALUE_CONFIG1:
1166 vp = &attr->config1;
1168 case PERF_PMU_FORMAT_VALUE_CONFIG2:
1169 vp = &attr->config2;
1171 case PERF_PMU_FORMAT_VALUE_CONFIG3:
1172 vp = &attr->config3;
1179 * Either directly use a numeric term, or try to translate string terms
1180 * using event parameters.
1182 if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) {
1183 if (term->no_value &&
1184 bitmap_weight(format->bits, PERF_PMU_FORMAT_BITS) > 1) {
1186 parse_events_error__handle(err, term->err_val,
1187 strdup("no value assigned for term"),
1193 val = term->val.num;
1194 } else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) {
1195 if (strcmp(term->val.str, "?")) {
1197 pr_info("Invalid sysfs entry %s=%s\n",
1198 term->config, term->val.str);
1201 parse_events_error__handle(err, term->err_val,
1202 strdup("expected numeric value"),
1208 if (pmu_resolve_param_term(term, head_terms, &val))
1213 max_val = pmu_format_max_value(format->bits);
1214 if (val > max_val) {
1218 parse_events_error__handle(err, term->err_val,
1220 "value too big for format, maximum is %llu",
1221 (unsigned long long)max_val) < 0
1222 ? strdup("value too big for format")
1228 * Assume we don't care if !err, in which case the value will be
1229 * silently truncated.
1233 pmu_format_value(format->bits, val, vp, zero);
1237 int perf_pmu__config_terms(const char *pmu_name, struct list_head *formats,
1238 struct perf_event_attr *attr,
1239 struct list_head *head_terms,
1240 bool zero, struct parse_events_error *err)
1242 struct parse_events_term *term;
1244 list_for_each_entry(term, head_terms, list) {
1245 if (pmu_config_term(pmu_name, formats, attr, term, head_terms,
1254 * Configures event's 'attr' parameter based on the:
1255 * 1) users input - specified in terms parameter
1256 * 2) pmu format definitions - specified by pmu parameter
1258 int perf_pmu__config(struct perf_pmu *pmu, struct perf_event_attr *attr,
1259 struct list_head *head_terms,
1260 struct parse_events_error *err)
1262 bool zero = !!pmu->default_config;
1264 return perf_pmu__config_terms(pmu->name, &pmu->format, attr,
1265 head_terms, zero, err);
1268 static struct perf_pmu_alias *pmu_find_alias(struct perf_pmu *pmu,
1269 struct parse_events_term *term)
1271 struct perf_pmu_alias *alias;
1274 if (parse_events__is_hardcoded_term(term))
1277 if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) {
1278 if (term->val.num != 1)
1280 if (pmu_find_format(&pmu->format, term->config))
1282 name = term->config;
1283 } else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) {
1284 if (strcasecmp(term->config, "event"))
1286 name = term->val.str;
1291 list_for_each_entry(alias, &pmu->aliases, list) {
1292 if (!strcasecmp(alias->name, name))
1299 static int check_info_data(struct perf_pmu_alias *alias,
1300 struct perf_pmu_info *info)
1303 * Only one term in event definition can
1304 * define unit, scale and snapshot, fail
1305 * if there's more than one.
1307 if ((info->unit && alias->unit[0]) ||
1308 (info->scale && alias->scale) ||
1309 (info->snapshot && alias->snapshot))
1313 info->unit = alias->unit;
1316 info->scale = alias->scale;
1318 if (alias->snapshot)
1319 info->snapshot = alias->snapshot;
1325 * Find alias in the terms list and replace it with the terms
1326 * defined for the alias
1328 int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms,
1329 struct perf_pmu_info *info)
1331 struct parse_events_term *term, *h;
1332 struct perf_pmu_alias *alias;
1335 info->per_pkg = false;
1338 * Mark unit and scale as not set
1339 * (different from default values, see below)
1343 info->snapshot = false;
1345 list_for_each_entry_safe(term, h, head_terms, list) {
1346 alias = pmu_find_alias(pmu, term);
1349 ret = pmu_alias_terms(alias, &term->list);
1353 ret = check_info_data(alias, info);
1358 info->per_pkg = true;
1360 list_del_init(&term->list);
1361 parse_events_term__delete(term);
1365 * if no unit or scale found in aliases, then
1366 * set defaults as for evsel
1367 * unit cannot left to NULL
1369 if (info->unit == NULL)
1372 if (info->scale == 0.0)
1378 int perf_pmu__new_format(struct list_head *list, char *name,
1379 int config, unsigned long *bits)
1381 struct perf_pmu_format *format;
1383 format = zalloc(sizeof(*format));
1387 format->name = strdup(name);
1388 format->value = config;
1389 memcpy(format->bits, bits, sizeof(format->bits));
1391 list_add_tail(&format->list, list);
1395 void perf_pmu__set_format(unsigned long *bits, long from, long to)
1402 memset(bits, 0, BITS_TO_BYTES(PERF_PMU_FORMAT_BITS));
1403 for (b = from; b <= to; b++)
1407 void perf_pmu__del_formats(struct list_head *formats)
1409 struct perf_pmu_format *fmt, *tmp;
1411 list_for_each_entry_safe(fmt, tmp, formats, list) {
1412 list_del(&fmt->list);
1418 bool is_pmu_core(const char *name)
1420 return !strcmp(name, "cpu") || !strcmp(name, "cpum_cf") || is_sysfs_pmu_core(name);
1423 bool perf_pmu__supports_legacy_cache(const struct perf_pmu *pmu)
1425 return pmu->is_core;
1428 bool perf_pmu__auto_merge_stats(const struct perf_pmu *pmu)
1430 return pmu->is_core && perf_pmus__num_core_pmus() == 1;
1433 bool perf_pmu__have_event(const struct perf_pmu *pmu, const char *name)
1435 struct perf_pmu_alias *alias;
1437 list_for_each_entry(alias, &pmu->aliases, list) {
1438 if (!strcmp(alias->name, name))
1444 bool perf_pmu__is_software(const struct perf_pmu *pmu)
1446 if (pmu->is_core || pmu->is_uncore || pmu->auxtrace)
1448 switch (pmu->type) {
1449 case PERF_TYPE_HARDWARE: return false;
1450 case PERF_TYPE_SOFTWARE: return true;
1451 case PERF_TYPE_TRACEPOINT: return true;
1452 case PERF_TYPE_HW_CACHE: return false;
1453 case PERF_TYPE_RAW: return false;
1454 case PERF_TYPE_BREAKPOINT: return true;
1457 return !strcmp(pmu->name, "kprobe") || !strcmp(pmu->name, "uprobe");
1460 FILE *perf_pmu__open_file(struct perf_pmu *pmu, const char *name)
1462 char path[PATH_MAX];
1464 if (!perf_pmu__pathname_scnprintf(path, sizeof(path), pmu->name, name) ||
1465 !file_available(path))
1468 return fopen(path, "r");
1471 FILE *perf_pmu__open_file_at(struct perf_pmu *pmu, int dirfd, const char *name)
1475 fd = perf_pmu__pathname_fd(dirfd, pmu->name, name, O_RDONLY);
1479 return fdopen(fd, "r");
1482 int perf_pmu__scan_file(struct perf_pmu *pmu, const char *name, const char *fmt,
1489 va_start(args, fmt);
1490 file = perf_pmu__open_file(pmu, name);
1492 ret = vfscanf(file, fmt, args);
1499 int perf_pmu__scan_file_at(struct perf_pmu *pmu, int dirfd, const char *name,
1500 const char *fmt, ...)
1506 va_start(args, fmt);
1507 file = perf_pmu__open_file_at(pmu, dirfd, name);
1509 ret = vfscanf(file, fmt, args);
1516 bool perf_pmu__file_exists(struct perf_pmu *pmu, const char *name)
1518 char path[PATH_MAX];
1520 if (!perf_pmu__pathname_scnprintf(path, sizeof(path), pmu->name, name))
1523 return file_available(path);
1526 static int perf_pmu__new_caps(struct list_head *list, char *name, char *value)
1528 struct perf_pmu_caps *caps = zalloc(sizeof(*caps));
1533 caps->name = strdup(name);
1536 caps->value = strndup(value, strlen(value) - 1);
1539 list_add_tail(&caps->list, list);
1550 static void perf_pmu__del_caps(struct perf_pmu *pmu)
1552 struct perf_pmu_caps *caps, *tmp;
1554 list_for_each_entry_safe(caps, tmp, &pmu->caps, list) {
1555 list_del(&caps->list);
1557 zfree(&caps->value);
1563 * Reading/parsing the given pmu capabilities, which should be located at:
1564 * /sys/bus/event_source/devices/<dev>/caps as sysfs group attributes.
1565 * Return the number of capabilities
1567 int perf_pmu__caps_parse(struct perf_pmu *pmu)
1570 char caps_path[PATH_MAX];
1572 struct dirent *evt_ent;
1575 if (pmu->caps_initialized)
1576 return pmu->nr_caps;
1580 if (!perf_pmu__pathname_scnprintf(caps_path, sizeof(caps_path), pmu->name, "caps"))
1583 if (stat(caps_path, &st) < 0) {
1584 pmu->caps_initialized = true;
1585 return 0; /* no error if caps does not exist */
1588 caps_dir = opendir(caps_path);
1592 caps_fd = dirfd(caps_dir);
1594 while ((evt_ent = readdir(caps_dir)) != NULL) {
1595 char *name = evt_ent->d_name;
1600 if (!strcmp(name, ".") || !strcmp(name, ".."))
1603 fd = openat(caps_fd, name, O_RDONLY);
1606 file = fdopen(fd, "r");
1612 if (!fgets(value, sizeof(value), file) ||
1613 (perf_pmu__new_caps(&pmu->caps, name, value) < 0)) {
1624 pmu->caps_initialized = true;
1625 return pmu->nr_caps;
1628 static void perf_pmu__compute_config_masks(struct perf_pmu *pmu)
1630 struct perf_pmu_format *format;
1632 if (pmu->config_masks_computed)
1635 list_for_each_entry(format, &pmu->format, list) {
1639 if (format->value >= PERF_PMU_FORMAT_VALUE_CONFIG_END)
1642 pmu->config_masks_present = true;
1643 mask = &pmu->config_masks[format->value];
1645 for_each_set_bit(i, format->bits, PERF_PMU_FORMAT_BITS)
1648 pmu->config_masks_computed = true;
1651 void perf_pmu__warn_invalid_config(struct perf_pmu *pmu, __u64 config,
1652 const char *name, int config_num,
1653 const char *config_name)
1658 perf_pmu__compute_config_masks(pmu);
1661 * Kernel doesn't export any valid format bits.
1663 if (!pmu->config_masks_present)
1666 bits = config & ~pmu->config_masks[config_num];
1670 bitmap_scnprintf((unsigned long *)&bits, sizeof(bits) * 8, buf, sizeof(buf));
1672 pr_warning("WARNING: event '%s' not valid (bits %s of %s "
1673 "'%llx' not supported by kernel)!\n",
1674 name ?: "N/A", buf, config_name, config);
1677 int perf_pmu__match(char *pattern, char *name, char *tok)
1682 if (fnmatch(pattern, name, 0))
1685 if (tok && !perf_pmu__match_ignoring_suffix(name, tok))
1691 double __weak perf_pmu__cpu_slots_per_cycle(void)
1696 int perf_pmu__event_source_devices_scnprintf(char *pathname, size_t size)
1698 const char *sysfs = sysfs__mountpoint();
1702 return scnprintf(pathname, size, "%s/bus/event_source/devices/", sysfs);
1705 int perf_pmu__event_source_devices_fd(void)
1707 char path[PATH_MAX];
1708 const char *sysfs = sysfs__mountpoint();
1713 scnprintf(path, sizeof(path), "%s/bus/event_source/devices/", sysfs);
1714 return open(path, O_DIRECTORY);
1718 * Fill 'buf' with the path to a file or folder in 'pmu_name' in
1719 * sysfs. For example if pmu_name = "cs_etm" and 'filename' = "format"
1720 * then pathname will be filled with
1721 * "/sys/bus/event_source/devices/cs_etm/format"
1723 * Return 0 if the sysfs mountpoint couldn't be found or if no
1724 * characters were written.
1726 int perf_pmu__pathname_scnprintf(char *buf, size_t size,
1727 const char *pmu_name, const char *filename)
1729 char base_path[PATH_MAX];
1731 if (!perf_pmu__event_source_devices_scnprintf(base_path, sizeof(base_path)))
1733 return scnprintf(buf, size, "%s%s/%s", base_path, pmu_name, filename);
1736 int perf_pmu__pathname_fd(int dirfd, const char *pmu_name, const char *filename, int flags)
1738 char path[PATH_MAX];
1740 scnprintf(path, sizeof(path), "%s/%s", pmu_name, filename);
1741 return openat(dirfd, path, flags);
1744 void perf_pmu__delete(struct perf_pmu *pmu)
1746 perf_pmu__del_formats(&pmu->format);
1747 perf_pmu__del_aliases(pmu);
1748 perf_pmu__del_caps(pmu);
1750 perf_cpu_map__put(pmu->cpus);
1752 zfree(&pmu->default_config);
1754 zfree(&pmu->alias_name);