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- // SPDX-License-Identifier: GPL-2.0
- #include <linux/list.h>
- #include <linux/compiler.h>
- #include <linux/string.h>
- #include <linux/zalloc.h>
- #include <subcmd/pager.h>
- #include <sys/types.h>
- #include <errno.h>
- #include <fcntl.h>
- #include <sys/stat.h>
- #include <unistd.h>
- #include <stdio.h>
- #include <stdbool.h>
- #include <stdarg.h>
- #include <dirent.h>
- #include <api/fs/fs.h>
- #include <locale.h>
- #include <regex.h>
- #include <perf/cpumap.h>
- #include "debug.h"
- #include "evsel.h"
- #include "pmu.h"
- #include "parse-events.h"
- #include "header.h"
- #include "string2.h"
- #include "strbuf.h"
- #include "fncache.h"
- struct perf_pmu perf_pmu__fake;
- struct perf_pmu_format {
- char *name;
- int value;
- DECLARE_BITMAP(bits, PERF_PMU_FORMAT_BITS);
- struct list_head list;
- };
- int perf_pmu_parse(struct list_head *list, char *name);
- extern FILE *perf_pmu_in;
- static LIST_HEAD(pmus);
- /*
- * Parse & process all the sysfs attributes located under
- * the directory specified in 'dir' parameter.
- */
- int perf_pmu__format_parse(char *dir, struct list_head *head)
- {
- struct dirent *evt_ent;
- DIR *format_dir;
- int ret = 0;
- format_dir = opendir(dir);
- if (!format_dir)
- return -EINVAL;
- while (!ret && (evt_ent = readdir(format_dir))) {
- char path[PATH_MAX];
- char *name = evt_ent->d_name;
- FILE *file;
- if (!strcmp(name, ".") || !strcmp(name, ".."))
- continue;
- snprintf(path, PATH_MAX, "%s/%s", dir, name);
- ret = -EINVAL;
- file = fopen(path, "r");
- if (!file)
- break;
- perf_pmu_in = file;
- ret = perf_pmu_parse(head, name);
- fclose(file);
- }
- closedir(format_dir);
- return ret;
- }
- /*
- * Reading/parsing the default pmu format definition, which should be
- * located at:
- * /sys/bus/event_source/devices/<dev>/format as sysfs group attributes.
- */
- static int pmu_format(const char *name, struct list_head *format)
- {
- char path[PATH_MAX];
- const char *sysfs = sysfs__mountpoint();
- if (!sysfs)
- return -1;
- snprintf(path, PATH_MAX,
- "%s" EVENT_SOURCE_DEVICE_PATH "%s/format", sysfs, name);
- if (!file_available(path))
- return 0;
- if (perf_pmu__format_parse(path, format))
- return -1;
- return 0;
- }
- int perf_pmu__convert_scale(const char *scale, char **end, double *sval)
- {
- char *lc;
- int ret = 0;
- /*
- * save current locale
- */
- lc = setlocale(LC_NUMERIC, NULL);
- /*
- * The lc string may be allocated in static storage,
- * so get a dynamic copy to make it survive setlocale
- * call below.
- */
- lc = strdup(lc);
- if (!lc) {
- ret = -ENOMEM;
- goto out;
- }
- /*
- * force to C locale to ensure kernel
- * scale string is converted correctly.
- * kernel uses default C locale.
- */
- setlocale(LC_NUMERIC, "C");
- *sval = strtod(scale, end);
- out:
- /* restore locale */
- setlocale(LC_NUMERIC, lc);
- free(lc);
- return ret;
- }
- static int perf_pmu__parse_scale(struct perf_pmu_alias *alias, char *dir, char *name)
- {
- struct stat st;
- ssize_t sret;
- char scale[128];
- int fd, ret = -1;
- char path[PATH_MAX];
- scnprintf(path, PATH_MAX, "%s/%s.scale", dir, name);
- fd = open(path, O_RDONLY);
- if (fd == -1)
- return -1;
- if (fstat(fd, &st) < 0)
- goto error;
- sret = read(fd, scale, sizeof(scale)-1);
- if (sret < 0)
- goto error;
- if (scale[sret - 1] == '\n')
- scale[sret - 1] = '\0';
- else
- scale[sret] = '\0';
- ret = perf_pmu__convert_scale(scale, NULL, &alias->scale);
- error:
- close(fd);
- return ret;
- }
- static int perf_pmu__parse_unit(struct perf_pmu_alias *alias, char *dir, char *name)
- {
- char path[PATH_MAX];
- ssize_t sret;
- int fd;
- scnprintf(path, PATH_MAX, "%s/%s.unit", dir, name);
- fd = open(path, O_RDONLY);
- if (fd == -1)
- return -1;
- sret = read(fd, alias->unit, UNIT_MAX_LEN);
- if (sret < 0)
- goto error;
- close(fd);
- if (alias->unit[sret - 1] == '\n')
- alias->unit[sret - 1] = '\0';
- else
- alias->unit[sret] = '\0';
- return 0;
- error:
- close(fd);
- alias->unit[0] = '\0';
- return -1;
- }
- static int
- perf_pmu__parse_per_pkg(struct perf_pmu_alias *alias, char *dir, char *name)
- {
- char path[PATH_MAX];
- int fd;
- scnprintf(path, PATH_MAX, "%s/%s.per-pkg", dir, name);
- fd = open(path, O_RDONLY);
- if (fd == -1)
- return -1;
- close(fd);
- alias->per_pkg = true;
- return 0;
- }
- static int perf_pmu__parse_snapshot(struct perf_pmu_alias *alias,
- char *dir, char *name)
- {
- char path[PATH_MAX];
- int fd;
- scnprintf(path, PATH_MAX, "%s/%s.snapshot", dir, name);
- fd = open(path, O_RDONLY);
- if (fd == -1)
- return -1;
- alias->snapshot = true;
- close(fd);
- return 0;
- }
- static void perf_pmu_assign_str(char *name, const char *field, char **old_str,
- char **new_str)
- {
- if (!*old_str)
- goto set_new;
- if (*new_str) { /* Have new string, check with old */
- if (strcasecmp(*old_str, *new_str))
- pr_debug("alias %s differs in field '%s'\n",
- name, field);
- zfree(old_str);
- } else /* Nothing new --> keep old string */
- return;
- set_new:
- *old_str = *new_str;
- *new_str = NULL;
- }
- static void perf_pmu_update_alias(struct perf_pmu_alias *old,
- struct perf_pmu_alias *newalias)
- {
- perf_pmu_assign_str(old->name, "desc", &old->desc, &newalias->desc);
- perf_pmu_assign_str(old->name, "long_desc", &old->long_desc,
- &newalias->long_desc);
- perf_pmu_assign_str(old->name, "topic", &old->topic, &newalias->topic);
- perf_pmu_assign_str(old->name, "metric_expr", &old->metric_expr,
- &newalias->metric_expr);
- perf_pmu_assign_str(old->name, "metric_name", &old->metric_name,
- &newalias->metric_name);
- perf_pmu_assign_str(old->name, "value", &old->str, &newalias->str);
- old->scale = newalias->scale;
- old->per_pkg = newalias->per_pkg;
- old->snapshot = newalias->snapshot;
- memcpy(old->unit, newalias->unit, sizeof(old->unit));
- }
- /* Delete an alias entry. */
- void perf_pmu_free_alias(struct perf_pmu_alias *newalias)
- {
- zfree(&newalias->name);
- zfree(&newalias->desc);
- zfree(&newalias->long_desc);
- zfree(&newalias->topic);
- zfree(&newalias->str);
- zfree(&newalias->metric_expr);
- zfree(&newalias->metric_name);
- parse_events_terms__purge(&newalias->terms);
- free(newalias);
- }
- /* Merge an alias, search in alias list. If this name is already
- * present merge both of them to combine all information.
- */
- static bool perf_pmu_merge_alias(struct perf_pmu_alias *newalias,
- struct list_head *alist)
- {
- struct perf_pmu_alias *a;
- list_for_each_entry(a, alist, list) {
- if (!strcasecmp(newalias->name, a->name)) {
- perf_pmu_update_alias(a, newalias);
- perf_pmu_free_alias(newalias);
- return true;
- }
- }
- return false;
- }
- static int __perf_pmu__new_alias(struct list_head *list, char *dir, char *name,
- char *desc, char *val,
- char *long_desc, char *topic,
- char *unit, char *perpkg,
- char *metric_expr,
- char *metric_name,
- char *deprecated)
- {
- struct parse_events_term *term;
- struct perf_pmu_alias *alias;
- int ret;
- int num;
- char newval[256];
- alias = malloc(sizeof(*alias));
- if (!alias)
- return -ENOMEM;
- INIT_LIST_HEAD(&alias->terms);
- alias->scale = 1.0;
- alias->unit[0] = '\0';
- alias->per_pkg = false;
- alias->snapshot = false;
- alias->deprecated = false;
- ret = parse_events_terms(&alias->terms, val);
- if (ret) {
- pr_err("Cannot parse alias %s: %d\n", val, ret);
- free(alias);
- return ret;
- }
- /* Scan event and remove leading zeroes, spaces, newlines, some
- * platforms have terms specified as
- * event=0x0091 (read from files ../<PMU>/events/<FILE>
- * and terms specified as event=0x91 (read from JSON files).
- *
- * Rebuild string to make alias->str member comparable.
- */
- memset(newval, 0, sizeof(newval));
- ret = 0;
- list_for_each_entry(term, &alias->terms, list) {
- if (ret)
- ret += scnprintf(newval + ret, sizeof(newval) - ret,
- ",");
- if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM)
- ret += scnprintf(newval + ret, sizeof(newval) - ret,
- "%s=%#x", term->config, term->val.num);
- else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR)
- ret += scnprintf(newval + ret, sizeof(newval) - ret,
- "%s=%s", term->config, term->val.str);
- }
- alias->name = strdup(name);
- if (dir) {
- /*
- * load unit name and scale if available
- */
- perf_pmu__parse_unit(alias, dir, name);
- perf_pmu__parse_scale(alias, dir, name);
- perf_pmu__parse_per_pkg(alias, dir, name);
- perf_pmu__parse_snapshot(alias, dir, name);
- }
- alias->metric_expr = metric_expr ? strdup(metric_expr) : NULL;
- alias->metric_name = metric_name ? strdup(metric_name): NULL;
- alias->desc = desc ? strdup(desc) : NULL;
- alias->long_desc = long_desc ? strdup(long_desc) :
- desc ? strdup(desc) : NULL;
- alias->topic = topic ? strdup(topic) : NULL;
- if (unit) {
- if (perf_pmu__convert_scale(unit, &unit, &alias->scale) < 0)
- return -1;
- snprintf(alias->unit, sizeof(alias->unit), "%s", unit);
- }
- alias->per_pkg = perpkg && sscanf(perpkg, "%d", &num) == 1 && num == 1;
- alias->str = strdup(newval);
- if (deprecated)
- alias->deprecated = true;
- if (!perf_pmu_merge_alias(alias, list))
- list_add_tail(&alias->list, list);
- return 0;
- }
- static int perf_pmu__new_alias(struct list_head *list, char *dir, char *name, FILE *file)
- {
- char buf[256];
- int ret;
- ret = fread(buf, 1, sizeof(buf), file);
- if (ret == 0)
- return -EINVAL;
- buf[ret] = 0;
- /* Remove trailing newline from sysfs file */
- strim(buf);
- return __perf_pmu__new_alias(list, dir, name, NULL, buf, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL);
- }
- static inline bool pmu_alias_info_file(char *name)
- {
- size_t len;
- len = strlen(name);
- if (len > 5 && !strcmp(name + len - 5, ".unit"))
- return true;
- if (len > 6 && !strcmp(name + len - 6, ".scale"))
- return true;
- if (len > 8 && !strcmp(name + len - 8, ".per-pkg"))
- return true;
- if (len > 9 && !strcmp(name + len - 9, ".snapshot"))
- return true;
- return false;
- }
- /*
- * Process all the sysfs attributes located under the directory
- * specified in 'dir' parameter.
- */
- static int pmu_aliases_parse(char *dir, struct list_head *head)
- {
- struct dirent *evt_ent;
- DIR *event_dir;
- event_dir = opendir(dir);
- if (!event_dir)
- return -EINVAL;
- while ((evt_ent = readdir(event_dir))) {
- char path[PATH_MAX];
- char *name = evt_ent->d_name;
- FILE *file;
- if (!strcmp(name, ".") || !strcmp(name, ".."))
- continue;
- /*
- * skip info files parsed in perf_pmu__new_alias()
- */
- if (pmu_alias_info_file(name))
- continue;
- scnprintf(path, PATH_MAX, "%s/%s", dir, name);
- file = fopen(path, "r");
- if (!file) {
- pr_debug("Cannot open %s\n", path);
- continue;
- }
- if (perf_pmu__new_alias(head, dir, name, file) < 0)
- pr_debug("Cannot set up %s\n", name);
- fclose(file);
- }
- closedir(event_dir);
- return 0;
- }
- /*
- * Reading the pmu event aliases definition, which should be located at:
- * /sys/bus/event_source/devices/<dev>/events as sysfs group attributes.
- */
- static int pmu_aliases(const char *name, struct list_head *head)
- {
- char path[PATH_MAX];
- const char *sysfs = sysfs__mountpoint();
- if (!sysfs)
- return -1;
- snprintf(path, PATH_MAX,
- "%s/bus/event_source/devices/%s/events", sysfs, name);
- if (!file_available(path))
- return 0;
- if (pmu_aliases_parse(path, head))
- return -1;
- return 0;
- }
- static int pmu_alias_terms(struct perf_pmu_alias *alias,
- struct list_head *terms)
- {
- struct parse_events_term *term, *cloned;
- LIST_HEAD(list);
- int ret;
- list_for_each_entry(term, &alias->terms, list) {
- ret = parse_events_term__clone(&cloned, term);
- if (ret) {
- parse_events_terms__purge(&list);
- return ret;
- }
- /*
- * Weak terms don't override command line options,
- * which we don't want for implicit terms in aliases.
- */
- cloned->weak = true;
- list_add_tail(&cloned->list, &list);
- }
- list_splice(&list, terms);
- return 0;
- }
- /*
- * Reading/parsing the default pmu type value, which should be
- * located at:
- * /sys/bus/event_source/devices/<dev>/type as sysfs attribute.
- */
- static int pmu_type(const char *name, __u32 *type)
- {
- char path[PATH_MAX];
- FILE *file;
- int ret = 0;
- const char *sysfs = sysfs__mountpoint();
- if (!sysfs)
- return -1;
- snprintf(path, PATH_MAX,
- "%s" EVENT_SOURCE_DEVICE_PATH "%s/type", sysfs, name);
- if (access(path, R_OK) < 0)
- return -1;
- file = fopen(path, "r");
- if (!file)
- return -EINVAL;
- if (1 != fscanf(file, "%u", type))
- ret = -1;
- fclose(file);
- return ret;
- }
- /* Add all pmus in sysfs to pmu list: */
- static void pmu_read_sysfs(void)
- {
- char path[PATH_MAX];
- DIR *dir;
- struct dirent *dent;
- const char *sysfs = sysfs__mountpoint();
- if (!sysfs)
- return;
- snprintf(path, PATH_MAX,
- "%s" EVENT_SOURCE_DEVICE_PATH, sysfs);
- dir = opendir(path);
- if (!dir)
- return;
- while ((dent = readdir(dir))) {
- if (!strcmp(dent->d_name, ".") || !strcmp(dent->d_name, ".."))
- continue;
- /* add to static LIST_HEAD(pmus): */
- perf_pmu__find(dent->d_name);
- }
- closedir(dir);
- }
- static struct perf_cpu_map *__pmu_cpumask(const char *path)
- {
- FILE *file;
- struct perf_cpu_map *cpus;
- file = fopen(path, "r");
- if (!file)
- return NULL;
- cpus = perf_cpu_map__read(file);
- fclose(file);
- return cpus;
- }
- /*
- * Uncore PMUs have a "cpumask" file under sysfs. CPU PMUs (e.g. on arm/arm64)
- * may have a "cpus" file.
- */
- #define CPUS_TEMPLATE_UNCORE "%s/bus/event_source/devices/%s/cpumask"
- #define CPUS_TEMPLATE_CPU "%s/bus/event_source/devices/%s/cpus"
- static struct perf_cpu_map *pmu_cpumask(const char *name)
- {
- char path[PATH_MAX];
- struct perf_cpu_map *cpus;
- const char *sysfs = sysfs__mountpoint();
- const char *templates[] = {
- CPUS_TEMPLATE_UNCORE,
- CPUS_TEMPLATE_CPU,
- NULL
- };
- const char **template;
- if (!sysfs)
- return NULL;
- for (template = templates; *template; template++) {
- snprintf(path, PATH_MAX, *template, sysfs, name);
- cpus = __pmu_cpumask(path);
- if (cpus)
- return cpus;
- }
- return NULL;
- }
- static bool pmu_is_uncore(const char *name)
- {
- char path[PATH_MAX];
- const char *sysfs;
- sysfs = sysfs__mountpoint();
- snprintf(path, PATH_MAX, CPUS_TEMPLATE_UNCORE, sysfs, name);
- return file_available(path);
- }
- /*
- * PMU CORE devices have different name other than cpu in sysfs on some
- * platforms.
- * Looking for possible sysfs files to identify the arm core device.
- */
- static int is_arm_pmu_core(const char *name)
- {
- char path[PATH_MAX];
- const char *sysfs = sysfs__mountpoint();
- if (!sysfs)
- return 0;
- /* Look for cpu sysfs (specific to arm) */
- scnprintf(path, PATH_MAX, "%s/bus/event_source/devices/%s/cpus",
- sysfs, name);
- return file_available(path);
- }
- static char *perf_pmu__getcpuid(struct perf_pmu *pmu)
- {
- char *cpuid;
- static bool printed;
- cpuid = getenv("PERF_CPUID");
- if (cpuid)
- cpuid = strdup(cpuid);
- if (!cpuid)
- cpuid = get_cpuid_str(pmu);
- if (!cpuid)
- return NULL;
- if (!printed) {
- pr_debug("Using CPUID %s\n", cpuid);
- printed = true;
- }
- return cpuid;
- }
- struct pmu_events_map *perf_pmu__find_map(struct perf_pmu *pmu)
- {
- struct pmu_events_map *map;
- char *cpuid = perf_pmu__getcpuid(pmu);
- int i;
- /* on some platforms which uses cpus map, cpuid can be NULL for
- * PMUs other than CORE PMUs.
- */
- if (!cpuid)
- return NULL;
- i = 0;
- for (;;) {
- map = &pmu_events_map[i++];
- if (!map->table) {
- map = NULL;
- break;
- }
- if (!strcmp_cpuid_str(map->cpuid, cpuid))
- break;
- }
- free(cpuid);
- return map;
- }
- bool pmu_uncore_alias_match(const char *pmu_name, const char *name)
- {
- char *tmp = NULL, *tok, *str;
- bool res;
- str = strdup(pmu_name);
- if (!str)
- return false;
- /*
- * uncore alias may be from different PMU with common prefix
- */
- tok = strtok_r(str, ",", &tmp);
- if (strncmp(pmu_name, tok, strlen(tok))) {
- res = false;
- goto out;
- }
- /*
- * Match more complex aliases where the alias name is a comma-delimited
- * list of tokens, orderly contained in the matching PMU name.
- *
- * Example: For alias "socket,pmuname" and PMU "socketX_pmunameY", we
- * match "socket" in "socketX_pmunameY" and then "pmuname" in
- * "pmunameY".
- */
- for (; tok; name += strlen(tok), tok = strtok_r(NULL, ",", &tmp)) {
- name = strstr(name, tok);
- if (!name) {
- res = false;
- goto out;
- }
- }
- res = true;
- out:
- free(str);
- return res;
- }
- /*
- * From the pmu_events_map, find the table of PMU events that corresponds
- * to the current running CPU. Then, add all PMU events from that table
- * as aliases.
- */
- void pmu_add_cpu_aliases_map(struct list_head *head, struct perf_pmu *pmu,
- struct pmu_events_map *map)
- {
- int i;
- const char *name = pmu->name;
- /*
- * Found a matching PMU events table. Create aliases
- */
- i = 0;
- while (1) {
- const char *cpu_name = is_arm_pmu_core(name) ? name : "cpu";
- struct pmu_event *pe = &map->table[i++];
- const char *pname = pe->pmu ? pe->pmu : cpu_name;
- if (!pe->name) {
- if (pe->metric_group || pe->metric_name)
- continue;
- break;
- }
- if (pmu_is_uncore(name) &&
- pmu_uncore_alias_match(pname, name))
- goto new_alias;
- if (strcmp(pname, name))
- continue;
- new_alias:
- /* need type casts to override 'const' */
- __perf_pmu__new_alias(head, NULL, (char *)pe->name,
- (char *)pe->desc, (char *)pe->event,
- (char *)pe->long_desc, (char *)pe->topic,
- (char *)pe->unit, (char *)pe->perpkg,
- (char *)pe->metric_expr,
- (char *)pe->metric_name,
- (char *)pe->deprecated);
- }
- }
- static void pmu_add_cpu_aliases(struct list_head *head, struct perf_pmu *pmu)
- {
- struct pmu_events_map *map;
- map = perf_pmu__find_map(pmu);
- if (!map)
- return;
- pmu_add_cpu_aliases_map(head, pmu, map);
- }
- struct perf_event_attr * __weak
- perf_pmu__get_default_config(struct perf_pmu *pmu __maybe_unused)
- {
- return NULL;
- }
- static int pmu_max_precise(const char *name)
- {
- char path[PATH_MAX];
- int max_precise = -1;
- scnprintf(path, PATH_MAX,
- "bus/event_source/devices/%s/caps/max_precise",
- name);
- sysfs__read_int(path, &max_precise);
- return max_precise;
- }
- static struct perf_pmu *pmu_lookup(const char *name)
- {
- struct perf_pmu *pmu;
- LIST_HEAD(format);
- LIST_HEAD(aliases);
- __u32 type;
- /*
- * The pmu data we store & need consists of the pmu
- * type value and format definitions. Load both right
- * now.
- */
- if (pmu_format(name, &format))
- return NULL;
- /*
- * Check the type first to avoid unnecessary work.
- */
- if (pmu_type(name, &type))
- return NULL;
- if (pmu_aliases(name, &aliases))
- return NULL;
- pmu = zalloc(sizeof(*pmu));
- if (!pmu)
- return NULL;
- pmu->cpus = pmu_cpumask(name);
- pmu->name = strdup(name);
- pmu->type = type;
- pmu->is_uncore = pmu_is_uncore(name);
- pmu->max_precise = pmu_max_precise(name);
- pmu_add_cpu_aliases(&aliases, pmu);
- INIT_LIST_HEAD(&pmu->format);
- INIT_LIST_HEAD(&pmu->aliases);
- INIT_LIST_HEAD(&pmu->caps);
- list_splice(&format, &pmu->format);
- list_splice(&aliases, &pmu->aliases);
- list_add_tail(&pmu->list, &pmus);
- pmu->default_config = perf_pmu__get_default_config(pmu);
- return pmu;
- }
- static struct perf_pmu *pmu_find(const char *name)
- {
- struct perf_pmu *pmu;
- list_for_each_entry(pmu, &pmus, list)
- if (!strcmp(pmu->name, name))
- return pmu;
- return NULL;
- }
- struct perf_pmu *perf_pmu__find_by_type(unsigned int type)
- {
- struct perf_pmu *pmu;
- list_for_each_entry(pmu, &pmus, list)
- if (pmu->type == type)
- return pmu;
- return NULL;
- }
- struct perf_pmu *perf_pmu__scan(struct perf_pmu *pmu)
- {
- /*
- * pmu iterator: If pmu is NULL, we start at the begin,
- * otherwise return the next pmu. Returns NULL on end.
- */
- if (!pmu) {
- pmu_read_sysfs();
- pmu = list_prepare_entry(pmu, &pmus, list);
- }
- list_for_each_entry_continue(pmu, &pmus, list)
- return pmu;
- return NULL;
- }
- struct perf_pmu *evsel__find_pmu(struct evsel *evsel)
- {
- struct perf_pmu *pmu = NULL;
- while ((pmu = perf_pmu__scan(pmu)) != NULL) {
- if (pmu->type == evsel->core.attr.type)
- break;
- }
- return pmu;
- }
- bool evsel__is_aux_event(struct evsel *evsel)
- {
- struct perf_pmu *pmu = evsel__find_pmu(evsel);
- return pmu && pmu->auxtrace;
- }
- struct perf_pmu *perf_pmu__find(const char *name)
- {
- struct perf_pmu *pmu;
- /*
- * Once PMU is loaded it stays in the list,
- * so we keep us from multiple reading/parsing
- * the pmu format definitions.
- */
- pmu = pmu_find(name);
- if (pmu)
- return pmu;
- return pmu_lookup(name);
- }
- static struct perf_pmu_format *
- pmu_find_format(struct list_head *formats, const char *name)
- {
- struct perf_pmu_format *format;
- list_for_each_entry(format, formats, list)
- if (!strcmp(format->name, name))
- return format;
- return NULL;
- }
- __u64 perf_pmu__format_bits(struct list_head *formats, const char *name)
- {
- struct perf_pmu_format *format = pmu_find_format(formats, name);
- __u64 bits = 0;
- int fbit;
- if (!format)
- return 0;
- for_each_set_bit(fbit, format->bits, PERF_PMU_FORMAT_BITS)
- bits |= 1ULL << fbit;
- return bits;
- }
- int perf_pmu__format_type(struct list_head *formats, const char *name)
- {
- struct perf_pmu_format *format = pmu_find_format(formats, name);
- if (!format)
- return -1;
- return format->value;
- }
- /*
- * Sets value based on the format definition (format parameter)
- * and unformated value (value parameter).
- */
- static void pmu_format_value(unsigned long *format, __u64 value, __u64 *v,
- bool zero)
- {
- unsigned long fbit, vbit;
- for (fbit = 0, vbit = 0; fbit < PERF_PMU_FORMAT_BITS; fbit++) {
- if (!test_bit(fbit, format))
- continue;
- if (value & (1llu << vbit++))
- *v |= (1llu << fbit);
- else if (zero)
- *v &= ~(1llu << fbit);
- }
- }
- static __u64 pmu_format_max_value(const unsigned long *format)
- {
- int w;
- w = bitmap_weight(format, PERF_PMU_FORMAT_BITS);
- if (!w)
- return 0;
- if (w < 64)
- return (1ULL << w) - 1;
- return -1;
- }
- /*
- * Term is a string term, and might be a param-term. Try to look up it's value
- * in the remaining terms.
- * - We have a term like "base-or-format-term=param-term",
- * - We need to find the value supplied for "param-term" (with param-term named
- * in a config string) later on in the term list.
- */
- static int pmu_resolve_param_term(struct parse_events_term *term,
- struct list_head *head_terms,
- __u64 *value)
- {
- struct parse_events_term *t;
- list_for_each_entry(t, head_terms, list) {
- if (t->type_val == PARSE_EVENTS__TERM_TYPE_NUM &&
- t->config && !strcmp(t->config, term->config)) {
- t->used = true;
- *value = t->val.num;
- return 0;
- }
- }
- if (verbose > 0)
- printf("Required parameter '%s' not specified\n", term->config);
- return -1;
- }
- static char *pmu_formats_string(struct list_head *formats)
- {
- struct perf_pmu_format *format;
- char *str = NULL;
- struct strbuf buf = STRBUF_INIT;
- unsigned i = 0;
- if (!formats)
- return NULL;
- /* sysfs exported terms */
- list_for_each_entry(format, formats, list)
- if (strbuf_addf(&buf, i++ ? ",%s" : "%s", format->name) < 0)
- goto error;
- str = strbuf_detach(&buf, NULL);
- error:
- strbuf_release(&buf);
- return str;
- }
- /*
- * Setup one of config[12] attr members based on the
- * user input data - term parameter.
- */
- static int pmu_config_term(const char *pmu_name,
- struct list_head *formats,
- struct perf_event_attr *attr,
- struct parse_events_term *term,
- struct list_head *head_terms,
- bool zero, struct parse_events_error *err)
- {
- struct perf_pmu_format *format;
- __u64 *vp;
- __u64 val, max_val;
- /*
- * If this is a parameter we've already used for parameterized-eval,
- * skip it in normal eval.
- */
- if (term->used)
- return 0;
- /*
- * Hardcoded terms should be already in, so nothing
- * to be done for them.
- */
- if (parse_events__is_hardcoded_term(term))
- return 0;
- format = pmu_find_format(formats, term->config);
- if (!format) {
- char *pmu_term = pmu_formats_string(formats);
- char *unknown_term;
- char *help_msg;
- if (asprintf(&unknown_term,
- "unknown term '%s' for pmu '%s'",
- term->config, pmu_name) < 0)
- unknown_term = NULL;
- help_msg = parse_events_formats_error_string(pmu_term);
- if (err) {
- parse_events__handle_error(err, term->err_term,
- unknown_term,
- help_msg);
- } else {
- pr_debug("%s (%s)\n", unknown_term, help_msg);
- free(unknown_term);
- }
- free(pmu_term);
- return -EINVAL;
- }
- switch (format->value) {
- case PERF_PMU_FORMAT_VALUE_CONFIG:
- vp = &attr->config;
- break;
- case PERF_PMU_FORMAT_VALUE_CONFIG1:
- vp = &attr->config1;
- break;
- case PERF_PMU_FORMAT_VALUE_CONFIG2:
- vp = &attr->config2;
- break;
- default:
- return -EINVAL;
- }
- /*
- * Either directly use a numeric term, or try to translate string terms
- * using event parameters.
- */
- if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) {
- if (term->no_value &&
- bitmap_weight(format->bits, PERF_PMU_FORMAT_BITS) > 1) {
- if (err) {
- parse_events__handle_error(err, term->err_val,
- strdup("no value assigned for term"),
- NULL);
- }
- return -EINVAL;
- }
- val = term->val.num;
- } else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) {
- if (strcmp(term->val.str, "?")) {
- if (verbose > 0) {
- pr_info("Invalid sysfs entry %s=%s\n",
- term->config, term->val.str);
- }
- if (err) {
- parse_events__handle_error(err, term->err_val,
- strdup("expected numeric value"),
- NULL);
- }
- return -EINVAL;
- }
- if (pmu_resolve_param_term(term, head_terms, &val))
- return -EINVAL;
- } else
- return -EINVAL;
- max_val = pmu_format_max_value(format->bits);
- if (val > max_val) {
- if (err) {
- char *err_str;
- parse_events__handle_error(err, term->err_val,
- asprintf(&err_str,
- "value too big for format, maximum is %llu",
- (unsigned long long)max_val) < 0
- ? strdup("value too big for format")
- : err_str,
- NULL);
- return -EINVAL;
- }
- /*
- * Assume we don't care if !err, in which case the value will be
- * silently truncated.
- */
- }
- pmu_format_value(format->bits, val, vp, zero);
- return 0;
- }
- int perf_pmu__config_terms(const char *pmu_name, struct list_head *formats,
- struct perf_event_attr *attr,
- struct list_head *head_terms,
- bool zero, struct parse_events_error *err)
- {
- struct parse_events_term *term;
- list_for_each_entry(term, head_terms, list) {
- if (pmu_config_term(pmu_name, formats, attr, term, head_terms,
- zero, err))
- return -EINVAL;
- }
- return 0;
- }
- /*
- * Configures event's 'attr' parameter based on the:
- * 1) users input - specified in terms parameter
- * 2) pmu format definitions - specified by pmu parameter
- */
- int perf_pmu__config(struct perf_pmu *pmu, struct perf_event_attr *attr,
- struct list_head *head_terms,
- struct parse_events_error *err)
- {
- bool zero = !!pmu->default_config;
- attr->type = pmu->type;
- return perf_pmu__config_terms(pmu->name, &pmu->format, attr,
- head_terms, zero, err);
- }
- static struct perf_pmu_alias *pmu_find_alias(struct perf_pmu *pmu,
- struct parse_events_term *term)
- {
- struct perf_pmu_alias *alias;
- char *name;
- if (parse_events__is_hardcoded_term(term))
- return NULL;
- if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) {
- if (term->val.num != 1)
- return NULL;
- if (pmu_find_format(&pmu->format, term->config))
- return NULL;
- name = term->config;
- } else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) {
- if (strcasecmp(term->config, "event"))
- return NULL;
- name = term->val.str;
- } else {
- return NULL;
- }
- list_for_each_entry(alias, &pmu->aliases, list) {
- if (!strcasecmp(alias->name, name))
- return alias;
- }
- return NULL;
- }
- static int check_info_data(struct perf_pmu_alias *alias,
- struct perf_pmu_info *info)
- {
- /*
- * Only one term in event definition can
- * define unit, scale and snapshot, fail
- * if there's more than one.
- */
- if ((info->unit && alias->unit[0]) ||
- (info->scale && alias->scale) ||
- (info->snapshot && alias->snapshot))
- return -EINVAL;
- if (alias->unit[0])
- info->unit = alias->unit;
- if (alias->scale)
- info->scale = alias->scale;
- if (alias->snapshot)
- info->snapshot = alias->snapshot;
- return 0;
- }
- /*
- * Find alias in the terms list and replace it with the terms
- * defined for the alias
- */
- int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms,
- struct perf_pmu_info *info)
- {
- struct parse_events_term *term, *h;
- struct perf_pmu_alias *alias;
- int ret;
- info->per_pkg = false;
- /*
- * Mark unit and scale as not set
- * (different from default values, see below)
- */
- info->unit = NULL;
- info->scale = 0.0;
- info->snapshot = false;
- info->metric_expr = NULL;
- info->metric_name = NULL;
- list_for_each_entry_safe(term, h, head_terms, list) {
- alias = pmu_find_alias(pmu, term);
- if (!alias)
- continue;
- ret = pmu_alias_terms(alias, &term->list);
- if (ret)
- return ret;
- ret = check_info_data(alias, info);
- if (ret)
- return ret;
- if (alias->per_pkg)
- info->per_pkg = true;
- info->metric_expr = alias->metric_expr;
- info->metric_name = alias->metric_name;
- list_del_init(&term->list);
- parse_events_term__delete(term);
- }
- /*
- * if no unit or scale foundin aliases, then
- * set defaults as for evsel
- * unit cannot left to NULL
- */
- if (info->unit == NULL)
- info->unit = "";
- if (info->scale == 0.0)
- info->scale = 1.0;
- return 0;
- }
- int perf_pmu__new_format(struct list_head *list, char *name,
- int config, unsigned long *bits)
- {
- struct perf_pmu_format *format;
- format = zalloc(sizeof(*format));
- if (!format)
- return -ENOMEM;
- format->name = strdup(name);
- format->value = config;
- memcpy(format->bits, bits, sizeof(format->bits));
- list_add_tail(&format->list, list);
- return 0;
- }
- void perf_pmu__set_format(unsigned long *bits, long from, long to)
- {
- long b;
- if (!to)
- to = from;
- memset(bits, 0, BITS_TO_BYTES(PERF_PMU_FORMAT_BITS));
- for (b = from; b <= to; b++)
- set_bit(b, bits);
- }
- void perf_pmu__del_formats(struct list_head *formats)
- {
- struct perf_pmu_format *fmt, *tmp;
- list_for_each_entry_safe(fmt, tmp, formats, list) {
- list_del(&fmt->list);
- free(fmt->name);
- free(fmt);
- }
- }
- static int sub_non_neg(int a, int b)
- {
- if (b > a)
- return 0;
- return a - b;
- }
- static char *format_alias(char *buf, int len, struct perf_pmu *pmu,
- struct perf_pmu_alias *alias)
- {
- struct parse_events_term *term;
- int used = snprintf(buf, len, "%s/%s", pmu->name, alias->name);
- list_for_each_entry(term, &alias->terms, list) {
- if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR)
- used += snprintf(buf + used, sub_non_neg(len, used),
- ",%s=%s", term->config,
- term->val.str);
- }
- if (sub_non_neg(len, used) > 0) {
- buf[used] = '/';
- used++;
- }
- if (sub_non_neg(len, used) > 0) {
- buf[used] = '\0';
- used++;
- } else
- buf[len - 1] = '\0';
- return buf;
- }
- static char *format_alias_or(char *buf, int len, struct perf_pmu *pmu,
- struct perf_pmu_alias *alias)
- {
- snprintf(buf, len, "%s OR %s/%s/", alias->name, pmu->name, alias->name);
- return buf;
- }
- struct sevent {
- char *name;
- char *desc;
- char *topic;
- char *str;
- char *pmu;
- char *metric_expr;
- char *metric_name;
- int is_cpu;
- };
- static int cmp_sevent(const void *a, const void *b)
- {
- const struct sevent *as = a;
- const struct sevent *bs = b;
- /* Put extra events last */
- if (!!as->desc != !!bs->desc)
- return !!as->desc - !!bs->desc;
- if (as->topic && bs->topic) {
- int n = strcmp(as->topic, bs->topic);
- if (n)
- return n;
- }
- /* Order CPU core events to be first */
- if (as->is_cpu != bs->is_cpu)
- return bs->is_cpu - as->is_cpu;
- return strcmp(as->name, bs->name);
- }
- static void wordwrap(char *s, int start, int max, int corr)
- {
- int column = start;
- int n;
- while (*s) {
- int wlen = strcspn(s, " \t");
- if (column + wlen >= max && column > start) {
- printf("\n%*s", start, "");
- column = start + corr;
- }
- n = printf("%s%.*s", column > start ? " " : "", wlen, s);
- if (n <= 0)
- break;
- s += wlen;
- column += n;
- s = skip_spaces(s);
- }
- }
- bool is_pmu_core(const char *name)
- {
- return !strcmp(name, "cpu") || is_arm_pmu_core(name);
- }
- void print_pmu_events(const char *event_glob, bool name_only, bool quiet_flag,
- bool long_desc, bool details_flag, bool deprecated)
- {
- struct perf_pmu *pmu;
- struct perf_pmu_alias *alias;
- char buf[1024];
- int printed = 0;
- int len, j;
- struct sevent *aliases;
- int numdesc = 0;
- int columns = pager_get_columns();
- char *topic = NULL;
- pmu = NULL;
- len = 0;
- while ((pmu = perf_pmu__scan(pmu)) != NULL) {
- list_for_each_entry(alias, &pmu->aliases, list)
- len++;
- if (pmu->selectable)
- len++;
- }
- aliases = zalloc(sizeof(struct sevent) * len);
- if (!aliases)
- goto out_enomem;
- pmu = NULL;
- j = 0;
- while ((pmu = perf_pmu__scan(pmu)) != NULL) {
- list_for_each_entry(alias, &pmu->aliases, list) {
- char *name = alias->desc ? alias->name :
- format_alias(buf, sizeof(buf), pmu, alias);
- bool is_cpu = is_pmu_core(pmu->name);
- if (alias->deprecated && !deprecated)
- continue;
- if (event_glob != NULL &&
- !(strglobmatch_nocase(name, event_glob) ||
- (!is_cpu && strglobmatch_nocase(alias->name,
- event_glob)) ||
- (alias->topic &&
- strglobmatch_nocase(alias->topic, event_glob))))
- continue;
- if (is_cpu && !name_only && !alias->desc)
- name = format_alias_or(buf, sizeof(buf), pmu, alias);
- aliases[j].name = name;
- if (is_cpu && !name_only && !alias->desc)
- aliases[j].name = format_alias_or(buf,
- sizeof(buf),
- pmu, alias);
- aliases[j].name = strdup(aliases[j].name);
- if (!aliases[j].name)
- goto out_enomem;
- aliases[j].desc = long_desc ? alias->long_desc :
- alias->desc;
- aliases[j].topic = alias->topic;
- aliases[j].str = alias->str;
- aliases[j].pmu = pmu->name;
- aliases[j].metric_expr = alias->metric_expr;
- aliases[j].metric_name = alias->metric_name;
- aliases[j].is_cpu = is_cpu;
- j++;
- }
- if (pmu->selectable &&
- (event_glob == NULL || strglobmatch(pmu->name, event_glob))) {
- char *s;
- if (asprintf(&s, "%s//", pmu->name) < 0)
- goto out_enomem;
- aliases[j].name = s;
- j++;
- }
- }
- len = j;
- qsort(aliases, len, sizeof(struct sevent), cmp_sevent);
- for (j = 0; j < len; j++) {
- /* Skip duplicates */
- if (j > 0 && !strcmp(aliases[j].name, aliases[j - 1].name))
- continue;
- if (name_only) {
- printf("%s ", aliases[j].name);
- continue;
- }
- if (aliases[j].desc && !quiet_flag) {
- if (numdesc++ == 0)
- printf("\n");
- if (aliases[j].topic && (!topic ||
- strcmp(topic, aliases[j].topic))) {
- printf("%s%s:\n", topic ? "\n" : "",
- aliases[j].topic);
- topic = aliases[j].topic;
- }
- printf(" %-50s\n", aliases[j].name);
- printf("%*s", 8, "[");
- wordwrap(aliases[j].desc, 8, columns, 0);
- printf("]\n");
- if (details_flag) {
- printf("%*s%s/%s/ ", 8, "", aliases[j].pmu, aliases[j].str);
- if (aliases[j].metric_name)
- printf(" MetricName: %s", aliases[j].metric_name);
- if (aliases[j].metric_expr)
- printf(" MetricExpr: %s", aliases[j].metric_expr);
- putchar('\n');
- }
- } else
- printf(" %-50s [Kernel PMU event]\n", aliases[j].name);
- printed++;
- }
- if (printed && pager_in_use())
- printf("\n");
- out_free:
- for (j = 0; j < len; j++)
- zfree(&aliases[j].name);
- zfree(&aliases);
- return;
- out_enomem:
- printf("FATAL: not enough memory to print PMU events\n");
- if (aliases)
- goto out_free;
- }
- bool pmu_have_event(const char *pname, const char *name)
- {
- struct perf_pmu *pmu;
- struct perf_pmu_alias *alias;
- pmu = NULL;
- while ((pmu = perf_pmu__scan(pmu)) != NULL) {
- if (strcmp(pname, pmu->name))
- continue;
- list_for_each_entry(alias, &pmu->aliases, list)
- if (!strcmp(alias->name, name))
- return true;
- }
- return false;
- }
- static FILE *perf_pmu__open_file(struct perf_pmu *pmu, const char *name)
- {
- char path[PATH_MAX];
- const char *sysfs;
- sysfs = sysfs__mountpoint();
- if (!sysfs)
- return NULL;
- snprintf(path, PATH_MAX,
- "%s" EVENT_SOURCE_DEVICE_PATH "%s/%s", sysfs, pmu->name, name);
- if (!file_available(path))
- return NULL;
- return fopen(path, "r");
- }
- int perf_pmu__scan_file(struct perf_pmu *pmu, const char *name, const char *fmt,
- ...)
- {
- va_list args;
- FILE *file;
- int ret = EOF;
- va_start(args, fmt);
- file = perf_pmu__open_file(pmu, name);
- if (file) {
- ret = vfscanf(file, fmt, args);
- fclose(file);
- }
- va_end(args);
- return ret;
- }
- static int perf_pmu__new_caps(struct list_head *list, char *name, char *value)
- {
- struct perf_pmu_caps *caps = zalloc(sizeof(*caps));
- if (!caps)
- return -ENOMEM;
- caps->name = strdup(name);
- if (!caps->name)
- goto free_caps;
- caps->value = strndup(value, strlen(value) - 1);
- if (!caps->value)
- goto free_name;
- list_add_tail(&caps->list, list);
- return 0;
- free_name:
- zfree(caps->name);
- free_caps:
- free(caps);
- return -ENOMEM;
- }
- /*
- * Reading/parsing the given pmu capabilities, which should be located at:
- * /sys/bus/event_source/devices/<dev>/caps as sysfs group attributes.
- * Return the number of capabilities
- */
- int perf_pmu__caps_parse(struct perf_pmu *pmu)
- {
- struct stat st;
- char caps_path[PATH_MAX];
- const char *sysfs = sysfs__mountpoint();
- DIR *caps_dir;
- struct dirent *evt_ent;
- int nr_caps = 0;
- if (!sysfs)
- return -1;
- snprintf(caps_path, PATH_MAX,
- "%s" EVENT_SOURCE_DEVICE_PATH "%s/caps", sysfs, pmu->name);
- if (stat(caps_path, &st) < 0)
- return 0; /* no error if caps does not exist */
- caps_dir = opendir(caps_path);
- if (!caps_dir)
- return -EINVAL;
- while ((evt_ent = readdir(caps_dir)) != NULL) {
- char path[PATH_MAX + NAME_MAX + 1];
- char *name = evt_ent->d_name;
- char value[128];
- FILE *file;
- if (!strcmp(name, ".") || !strcmp(name, ".."))
- continue;
- snprintf(path, sizeof(path), "%s/%s", caps_path, name);
- file = fopen(path, "r");
- if (!file)
- continue;
- if (!fgets(value, sizeof(value), file) ||
- (perf_pmu__new_caps(&pmu->caps, name, value) < 0)) {
- fclose(file);
- continue;
- }
- nr_caps++;
- fclose(file);
- }
- closedir(caps_dir);
- return nr_caps;
- }
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