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-rw-r--r--tools/perf/util/pmu.c2068
1 files changed, 2068 insertions, 0 deletions
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
new file mode 100644
index 0000000000..d515ba8a0e
--- /dev/null
+++ b/tools/perf/util/pmu.c
@@ -0,0 +1,2068 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/list.h>
+#include <linux/compiler.h>
+#include <linux/string.h>
+#include <linux/zalloc.h>
+#include <linux/ctype.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include <dirent.h>
+#include <api/fs/fs.h>
+#include <locale.h>
+#include <fnmatch.h>
+#include <math.h>
+#include "debug.h"
+#include "evsel.h"
+#include "pmu.h"
+#include "pmus.h"
+#include <util/pmu-bison.h>
+#include <util/pmu-flex.h>
+#include "parse-events.h"
+#include "print-events.h"
+#include "header.h"
+#include "string2.h"
+#include "strbuf.h"
+#include "fncache.h"
+#include "util/evsel_config.h"
+
+struct perf_pmu perf_pmu__fake = {
+ .name = "fake",
+};
+
+#define UNIT_MAX_LEN 31 /* max length for event unit name */
+
+/**
+ * struct perf_pmu_alias - An event either read from sysfs or builtin in
+ * pmu-events.c, created by parsing the pmu-events json files.
+ */
+struct perf_pmu_alias {
+ /** @name: Name of the event like "mem-loads". */
+ char *name;
+ /** @desc: Optional short description of the event. */
+ char *desc;
+ /** @long_desc: Optional long description. */
+ char *long_desc;
+ /**
+ * @topic: Optional topic such as cache or pipeline, particularly for
+ * json events.
+ */
+ char *topic;
+ /** @terms: Owned list of the original parsed parameters. */
+ struct list_head terms;
+ /** @list: List element of struct perf_pmu aliases. */
+ struct list_head list;
+ /**
+ * @pmu_name: The name copied from the json struct pmu_event. This can
+ * differ from the PMU name as it won't have suffixes.
+ */
+ char *pmu_name;
+ /** @unit: Units for the event, such as bytes or cache lines. */
+ char unit[UNIT_MAX_LEN+1];
+ /** @scale: Value to scale read counter values by. */
+ double scale;
+ /**
+ * @per_pkg: Does the file
+ * <sysfs>/bus/event_source/devices/<pmu_name>/events/<name>.per-pkg or
+ * equivalent json value exist and have the value 1.
+ */
+ bool per_pkg;
+ /**
+ * @snapshot: Does the file
+ * <sysfs>/bus/event_source/devices/<pmu_name>/events/<name>.snapshot
+ * exist and have the value 1.
+ */
+ bool snapshot;
+ /**
+ * @deprecated: Is the event hidden and so not shown in perf list by
+ * default.
+ */
+ bool deprecated;
+ /** @from_sysfs: Was the alias from sysfs or a json event? */
+ bool from_sysfs;
+ /** @info_loaded: Have the scale, unit and other values been read from disk? */
+ bool info_loaded;
+};
+
+/**
+ * struct perf_pmu_format - Values from a format file read from
+ * <sysfs>/devices/cpu/format/ held in struct perf_pmu.
+ *
+ * For example, the contents of <sysfs>/devices/cpu/format/event may be
+ * "config:0-7" and will be represented here as name="event",
+ * value=PERF_PMU_FORMAT_VALUE_CONFIG and bits 0 to 7 will be set.
+ */
+struct perf_pmu_format {
+ /** @list: Element on list within struct perf_pmu. */
+ struct list_head list;
+ /** @bits: Which config bits are set by this format value. */
+ DECLARE_BITMAP(bits, PERF_PMU_FORMAT_BITS);
+ /** @name: The modifier/file name. */
+ char *name;
+ /**
+ * @value : Which config value the format relates to. Supported values
+ * are from PERF_PMU_FORMAT_VALUE_CONFIG to
+ * PERF_PMU_FORMAT_VALUE_CONFIG_END.
+ */
+ u16 value;
+ /** @loaded: Has the contents been loaded/parsed. */
+ bool loaded;
+};
+
+static int pmu_aliases_parse(struct perf_pmu *pmu);
+
+static struct perf_pmu_format *perf_pmu__new_format(struct list_head *list, char *name)
+{
+ struct perf_pmu_format *format;
+
+ format = zalloc(sizeof(*format));
+ if (!format)
+ return NULL;
+
+ format->name = strdup(name);
+ if (!format->name) {
+ free(format);
+ return NULL;
+ }
+ list_add_tail(&format->list, list);
+ return format;
+}
+
+/* Called at the end of parsing a format. */
+void perf_pmu_format__set_value(void *vformat, int config, unsigned long *bits)
+{
+ struct perf_pmu_format *format = vformat;
+
+ format->value = config;
+ memcpy(format->bits, bits, sizeof(format->bits));
+}
+
+static void __perf_pmu_format__load(struct perf_pmu_format *format, FILE *file)
+{
+ void *scanner;
+ int ret;
+
+ ret = perf_pmu_lex_init(&scanner);
+ if (ret)
+ return;
+
+ perf_pmu_set_in(file, scanner);
+ ret = perf_pmu_parse(format, scanner);
+ perf_pmu_lex_destroy(scanner);
+ format->loaded = true;
+}
+
+static void perf_pmu_format__load(struct perf_pmu *pmu, struct perf_pmu_format *format)
+{
+ char path[PATH_MAX];
+ FILE *file = NULL;
+
+ if (format->loaded)
+ return;
+
+ if (!perf_pmu__pathname_scnprintf(path, sizeof(path), pmu->name, "format"))
+ return;
+
+ assert(strlen(path) + strlen(format->name) + 2 < sizeof(path));
+ strcat(path, "/");
+ strcat(path, format->name);
+
+ file = fopen(path, "r");
+ if (!file)
+ return;
+ __perf_pmu_format__load(format, file);
+ fclose(file);
+}
+
+/*
+ * Parse & process all the sysfs attributes located under
+ * the directory specified in 'dir' parameter.
+ */
+int perf_pmu__format_parse(struct perf_pmu *pmu, int dirfd, bool eager_load)
+{
+ struct dirent *evt_ent;
+ DIR *format_dir;
+ int ret = 0;
+
+ format_dir = fdopendir(dirfd);
+ if (!format_dir)
+ return -EINVAL;
+
+ while ((evt_ent = readdir(format_dir)) != NULL) {
+ struct perf_pmu_format *format;
+ char *name = evt_ent->d_name;
+
+ if (!strcmp(name, ".") || !strcmp(name, ".."))
+ continue;
+
+ format = perf_pmu__new_format(&pmu->format, name);
+ if (!format) {
+ ret = -ENOMEM;
+ break;
+ }
+
+ if (eager_load) {
+ FILE *file;
+ int fd = openat(dirfd, name, O_RDONLY);
+
+ if (fd < 0) {
+ ret = -errno;
+ break;
+ }
+ file = fdopen(fd, "r");
+ if (!file) {
+ close(fd);
+ break;
+ }
+ __perf_pmu_format__load(format, file);
+ 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(struct perf_pmu *pmu, int dirfd, const char *name)
+{
+ int fd;
+
+ fd = perf_pmu__pathname_fd(dirfd, name, "format", O_DIRECTORY);
+ if (fd < 0)
+ return 0;
+
+ /* it'll close the fd */
+ if (perf_pmu__format_parse(pmu, fd, /*eager_load=*/false))
+ 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 *pmu, struct perf_pmu_alias *alias)
+{
+ struct stat st;
+ ssize_t sret;
+ size_t len;
+ char scale[128];
+ int fd, ret = -1;
+ char path[PATH_MAX];
+
+ len = perf_pmu__event_source_devices_scnprintf(path, sizeof(path));
+ if (!len)
+ return 0;
+ scnprintf(path + len, sizeof(path) - len, "%s/events/%s.scale", pmu->name, alias->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 *pmu, struct perf_pmu_alias *alias)
+{
+ char path[PATH_MAX];
+ size_t len;
+ ssize_t sret;
+ int fd;
+
+
+ len = perf_pmu__event_source_devices_scnprintf(path, sizeof(path));
+ if (!len)
+ return 0;
+ scnprintf(path + len, sizeof(path) - len, "%s/events/%s.unit", pmu->name, alias->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 *pmu, struct perf_pmu_alias *alias)
+{
+ char path[PATH_MAX];
+ size_t len;
+ int fd;
+
+ len = perf_pmu__event_source_devices_scnprintf(path, sizeof(path));
+ if (!len)
+ return 0;
+ scnprintf(path + len, sizeof(path) - len, "%s/events/%s.per-pkg", pmu->name, alias->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 *pmu, struct perf_pmu_alias *alias)
+{
+ char path[PATH_MAX];
+ size_t len;
+ int fd;
+
+ len = perf_pmu__event_source_devices_scnprintf(path, sizeof(path));
+ if (!len)
+ return 0;
+ scnprintf(path + len, sizeof(path) - len, "%s/events/%s.snapshot", pmu->name, alias->name);
+
+ fd = open(path, O_RDONLY);
+ if (fd == -1)
+ return -1;
+
+ alias->snapshot = true;
+ close(fd);
+ return 0;
+}
+
+/* Delete an alias entry. */
+static 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->pmu_name);
+ parse_events_terms__purge(&newalias->terms);
+ free(newalias);
+}
+
+static void perf_pmu__del_aliases(struct perf_pmu *pmu)
+{
+ struct perf_pmu_alias *alias, *tmp;
+
+ list_for_each_entry_safe(alias, tmp, &pmu->aliases, list) {
+ list_del(&alias->list);
+ perf_pmu_free_alias(alias);
+ }
+}
+
+static struct perf_pmu_alias *perf_pmu__find_alias(struct perf_pmu *pmu,
+ const char *name,
+ bool load)
+{
+ struct perf_pmu_alias *alias;
+
+ if (load && !pmu->sysfs_aliases_loaded)
+ pmu_aliases_parse(pmu);
+
+ list_for_each_entry(alias, &pmu->aliases, list) {
+ if (!strcasecmp(alias->name, name))
+ return alias;
+ }
+ return NULL;
+}
+
+static bool assign_str(const char *name, const char *field, char **old_str,
+ const char *new_str)
+{
+ if (!*old_str && new_str) {
+ *old_str = strdup(new_str);
+ return true;
+ }
+
+ if (!new_str || !strcasecmp(*old_str, new_str))
+ return false; /* Nothing to update. */
+
+ pr_debug("alias %s differs in field '%s' ('%s' != '%s')\n",
+ name, field, *old_str, new_str);
+ zfree(old_str);
+ *old_str = strdup(new_str);
+ return true;
+}
+
+static void read_alias_info(struct perf_pmu *pmu, struct perf_pmu_alias *alias)
+{
+ if (!alias->from_sysfs || alias->info_loaded)
+ return;
+
+ /*
+ * load unit name and scale if available
+ */
+ perf_pmu__parse_unit(pmu, alias);
+ perf_pmu__parse_scale(pmu, alias);
+ perf_pmu__parse_per_pkg(pmu, alias);
+ perf_pmu__parse_snapshot(pmu, alias);
+}
+
+struct update_alias_data {
+ struct perf_pmu *pmu;
+ struct perf_pmu_alias *alias;
+};
+
+static int update_alias(const struct pmu_event *pe,
+ const struct pmu_events_table *table __maybe_unused,
+ void *vdata)
+{
+ struct update_alias_data *data = vdata;
+ int ret = 0;
+
+ read_alias_info(data->pmu, data->alias);
+ assign_str(pe->name, "desc", &data->alias->desc, pe->desc);
+ assign_str(pe->name, "long_desc", &data->alias->long_desc, pe->long_desc);
+ assign_str(pe->name, "topic", &data->alias->topic, pe->topic);
+ data->alias->per_pkg = pe->perpkg;
+ if (pe->event) {
+ parse_events_terms__purge(&data->alias->terms);
+ ret = parse_events_terms(&data->alias->terms, pe->event, /*input=*/NULL);
+ }
+ if (!ret && pe->unit) {
+ char *unit;
+
+ ret = perf_pmu__convert_scale(pe->unit, &unit, &data->alias->scale);
+ if (!ret)
+ snprintf(data->alias->unit, sizeof(data->alias->unit), "%s", unit);
+ }
+ return ret;
+}
+
+static int perf_pmu__new_alias(struct perf_pmu *pmu, const char *name,
+ const char *desc, const char *val, FILE *val_fd,
+ const struct pmu_event *pe)
+{
+ struct perf_pmu_alias *alias;
+ int ret;
+ const char *long_desc = NULL, *topic = NULL, *unit = NULL, *pmu_name = NULL;
+ bool deprecated = false, perpkg = false;
+
+ if (perf_pmu__find_alias(pmu, name, /*load=*/ false)) {
+ /* Alias was already created/loaded. */
+ return 0;
+ }
+
+ if (pe) {
+ long_desc = pe->long_desc;
+ topic = pe->topic;
+ unit = pe->unit;
+ perpkg = pe->perpkg;
+ deprecated = pe->deprecated;
+ pmu_name = pe->pmu;
+ }
+
+ alias = zalloc(sizeof(*alias));
+ if (!alias)
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(&alias->terms);
+ alias->scale = 1.0;
+ alias->unit[0] = '\0';
+ alias->per_pkg = perpkg;
+ alias->snapshot = false;
+ alias->deprecated = deprecated;
+
+ ret = parse_events_terms(&alias->terms, val, val_fd);
+ if (ret) {
+ pr_err("Cannot parse alias %s: %d\n", val, ret);
+ free(alias);
+ return ret;
+ }
+
+ alias->name = strdup(name);
+ alias->desc = desc ? strdup(desc) : NULL;
+ alias->long_desc = long_desc ? strdup(long_desc) :
+ desc ? strdup(desc) : NULL;
+ alias->topic = topic ? strdup(topic) : NULL;
+ alias->pmu_name = pmu_name ? strdup(pmu_name) : NULL;
+ if (unit) {
+ if (perf_pmu__convert_scale(unit, (char **)&unit, &alias->scale) < 0) {
+ perf_pmu_free_alias(alias);
+ return -1;
+ }
+ snprintf(alias->unit, sizeof(alias->unit), "%s", unit);
+ }
+ if (!pe) {
+ /* Update an event from sysfs with json data. */
+ struct update_alias_data data = {
+ .pmu = pmu,
+ .alias = alias,
+ };
+
+ alias->from_sysfs = true;
+ if (pmu->events_table) {
+ if (pmu_events_table__find_event(pmu->events_table, pmu, name,
+ update_alias, &data) == 0)
+ pmu->loaded_json_aliases++;
+ }
+ }
+
+ if (!pe)
+ pmu->sysfs_aliases++;
+ else
+ pmu->loaded_json_aliases++;
+ list_add_tail(&alias->list, &pmu->aliases);
+ return 0;
+}
+
+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;
+}
+
+/*
+ * 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_parse(struct perf_pmu *pmu)
+{
+ char path[PATH_MAX];
+ struct dirent *evt_ent;
+ DIR *event_dir;
+ size_t len;
+ int fd, dir_fd;
+
+ len = perf_pmu__event_source_devices_scnprintf(path, sizeof(path));
+ if (!len)
+ return 0;
+ scnprintf(path + len, sizeof(path) - len, "%s/events", pmu->name);
+
+ dir_fd = open(path, O_DIRECTORY);
+ if (dir_fd == -1) {
+ pmu->sysfs_aliases_loaded = true;
+ return 0;
+ }
+
+ event_dir = fdopendir(dir_fd);
+ if (!event_dir){
+ close (dir_fd);
+ return -EINVAL;
+ }
+
+ while ((evt_ent = readdir(event_dir))) {
+ 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;
+
+ fd = openat(dir_fd, name, O_RDONLY);
+ if (fd == -1) {
+ pr_debug("Cannot open %s\n", name);
+ continue;
+ }
+ file = fdopen(fd, "r");
+ if (!file) {
+ close(fd);
+ continue;
+ }
+
+ if (perf_pmu__new_alias(pmu, name, /*desc=*/ NULL,
+ /*val=*/ NULL, file, /*pe=*/ NULL) < 0)
+ pr_debug("Cannot set up %s\n", name);
+ fclose(file);
+ }
+
+ closedir(event_dir);
+ close (dir_fd);
+ pmu->sysfs_aliases_loaded = true;
+ 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;
+}
+
+/*
+ * Uncore PMUs have a "cpumask" file under sysfs. CPU PMUs (e.g. on arm/arm64)
+ * may have a "cpus" file.
+ */
+static struct perf_cpu_map *pmu_cpumask(int dirfd, const char *name, bool is_core)
+{
+ struct perf_cpu_map *cpus;
+ const char *templates[] = {
+ "cpumask",
+ "cpus",
+ NULL
+ };
+ const char **template;
+ char pmu_name[PATH_MAX];
+ struct perf_pmu pmu = {.name = pmu_name};
+ FILE *file;
+
+ strlcpy(pmu_name, name, sizeof(pmu_name));
+ for (template = templates; *template; template++) {
+ file = perf_pmu__open_file_at(&pmu, dirfd, *template);
+ if (!file)
+ continue;
+ cpus = perf_cpu_map__read(file);
+ fclose(file);
+ if (cpus)
+ return cpus;
+ }
+
+ /* Nothing found, for core PMUs assume this means all CPUs. */
+ return is_core ? perf_cpu_map__get(cpu_map__online()) : NULL;
+}
+
+static bool pmu_is_uncore(int dirfd, const char *name)
+{
+ int fd;
+
+ fd = perf_pmu__pathname_fd(dirfd, name, "cpumask", O_PATH);
+ if (fd < 0)
+ return false;
+
+ close(fd);
+ return true;
+}
+
+static char *pmu_id(const char *name)
+{
+ char path[PATH_MAX], *str;
+ size_t len;
+
+ perf_pmu__pathname_scnprintf(path, sizeof(path), name, "identifier");
+
+ if (filename__read_str(path, &str, &len) < 0)
+ return NULL;
+
+ str[len - 1] = 0; /* remove line feed */
+
+ return str;
+}
+
+/**
+ * is_sysfs_pmu_core() - PMU CORE devices have different name other than cpu in
+ * sysfs on some platforms like ARM or Intel hybrid. Looking for
+ * possible the cpus file in sysfs files to identify whether this is a
+ * core device.
+ * @name: The PMU name such as "cpu_atom".
+ */
+static int is_sysfs_pmu_core(const char *name)
+{
+ char path[PATH_MAX];
+
+ if (!perf_pmu__pathname_scnprintf(path, sizeof(path), name, "cpus"))
+ return 0;
+ return file_available(path);
+}
+
+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;
+}
+
+__weak const struct pmu_events_table *pmu_events_table__find(void)
+{
+ return perf_pmu__find_events_table(NULL);
+}
+
+__weak const struct pmu_metrics_table *pmu_metrics_table__find(void)
+{
+ return perf_pmu__find_metrics_table(NULL);
+}
+
+/**
+ * perf_pmu__match_ignoring_suffix - Does the pmu_name match tok ignoring any
+ * trailing suffix? The Suffix must be in form
+ * tok_{digits}, or tok{digits}.
+ * @pmu_name: The pmu_name with possible suffix.
+ * @tok: The possible match to pmu_name without suffix.
+ */
+static bool perf_pmu__match_ignoring_suffix(const char *pmu_name, const char *tok)
+{
+ const char *p;
+
+ if (strncmp(pmu_name, tok, strlen(tok)))
+ return false;
+
+ p = pmu_name + strlen(tok);
+ if (*p == 0)
+ return true;
+
+ if (*p == '_')
+ ++p;
+
+ /* Ensure we end in a number */
+ while (1) {
+ if (!isdigit(*p))
+ return false;
+ if (*(++p) == 0)
+ break;
+ }
+
+ return true;
+}
+
+/**
+ * pmu_uncore_alias_match - does name match the PMU name?
+ * @pmu_name: the json struct pmu_event name. This may lack a suffix (which
+ * matches) or be of the form "socket,pmuname" which will match
+ * "socketX_pmunameY".
+ * @name: a real full PMU name as from sysfs.
+ */
+static bool pmu_uncore_alias_match(const char *pmu_name, const char *name)
+{
+ char *tmp = NULL, *tok, *str;
+ bool res;
+
+ if (strchr(pmu_name, ',') == NULL)
+ return perf_pmu__match_ignoring_suffix(name, pmu_name);
+
+ 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".
+ */
+ while (1) {
+ char *next_tok = strtok_r(NULL, ",", &tmp);
+
+ name = strstr(name, tok);
+ if (!name ||
+ (!next_tok && !perf_pmu__match_ignoring_suffix(name, tok))) {
+ res = false;
+ goto out;
+ }
+ if (!next_tok)
+ break;
+ tok = next_tok;
+ name += strlen(tok);
+ }
+
+ res = true;
+out:
+ free(str);
+ return res;
+}
+
+static int pmu_add_cpu_aliases_map_callback(const struct pmu_event *pe,
+ const struct pmu_events_table *table __maybe_unused,
+ void *vdata)
+{
+ struct perf_pmu *pmu = vdata;
+
+ perf_pmu__new_alias(pmu, pe->name, pe->desc, pe->event, /*val_fd=*/ NULL, pe);
+ return 0;
+}
+
+/*
+ * From the pmu_events_table, find the events that correspond to the given
+ * PMU and add them to the list 'head'.
+ */
+void pmu_add_cpu_aliases_table(struct perf_pmu *pmu, const struct pmu_events_table *table)
+{
+ pmu_events_table__for_each_event(table, pmu, pmu_add_cpu_aliases_map_callback, pmu);
+}
+
+static void pmu_add_cpu_aliases(struct perf_pmu *pmu)
+{
+ if (!pmu->events_table)
+ return;
+
+ if (pmu->cpu_aliases_added)
+ return;
+
+ pmu_add_cpu_aliases_table(pmu, pmu->events_table);
+ pmu->cpu_aliases_added = true;
+}
+
+static int pmu_add_sys_aliases_iter_fn(const struct pmu_event *pe,
+ const struct pmu_events_table *table __maybe_unused,
+ void *vdata)
+{
+ struct perf_pmu *pmu = vdata;
+
+ if (!pe->compat || !pe->pmu)
+ return 0;
+
+ if (!strcmp(pmu->id, pe->compat) &&
+ pmu_uncore_alias_match(pe->pmu, pmu->name)) {
+ perf_pmu__new_alias(pmu,
+ pe->name,
+ pe->desc,
+ pe->event,
+ /*val_fd=*/ NULL,
+ pe);
+ }
+
+ return 0;
+}
+
+void pmu_add_sys_aliases(struct perf_pmu *pmu)
+{
+ if (!pmu->id)
+ return;
+
+ pmu_for_each_sys_event(pmu_add_sys_aliases_iter_fn, pmu);
+}
+
+struct perf_event_attr * __weak
+perf_pmu__get_default_config(struct perf_pmu *pmu __maybe_unused)
+{
+ return NULL;
+}
+
+const char * __weak
+pmu_find_real_name(const char *name)
+{
+ return name;
+}
+
+const char * __weak
+pmu_find_alias_name(const char *name __maybe_unused)
+{
+ return NULL;
+}
+
+static int pmu_max_precise(int dirfd, struct perf_pmu *pmu)
+{
+ int max_precise = -1;
+
+ perf_pmu__scan_file_at(pmu, dirfd, "caps/max_precise", "%d", &max_precise);
+ return max_precise;
+}
+
+struct perf_pmu *perf_pmu__lookup(struct list_head *pmus, int dirfd, const char *lookup_name)
+{
+ struct perf_pmu *pmu;
+ __u32 type;
+ const char *name = pmu_find_real_name(lookup_name);
+ const char *alias_name;
+
+ pmu = zalloc(sizeof(*pmu));
+ if (!pmu)
+ return NULL;
+
+ pmu->name = strdup(name);
+ if (!pmu->name)
+ goto err;
+
+ /*
+ * Read type early to fail fast if a lookup name isn't a PMU. Ensure
+ * that type value is successfully assigned (return 1).
+ */
+ if (perf_pmu__scan_file_at(pmu, dirfd, "type", "%u", &type) != 1)
+ goto err;
+
+ INIT_LIST_HEAD(&pmu->format);
+ INIT_LIST_HEAD(&pmu->aliases);
+ INIT_LIST_HEAD(&pmu->caps);
+
+ /*
+ * The pmu data we store & need consists of the pmu
+ * type value and format definitions. Load both right
+ * now.
+ */
+ if (pmu_format(pmu, dirfd, name)) {
+ free(pmu);
+ return NULL;
+ }
+ pmu->is_core = is_pmu_core(name);
+ pmu->cpus = pmu_cpumask(dirfd, name, pmu->is_core);
+
+ alias_name = pmu_find_alias_name(name);
+ if (alias_name) {
+ pmu->alias_name = strdup(alias_name);
+ if (!pmu->alias_name)
+ goto err;
+ }
+
+ pmu->type = type;
+ pmu->is_uncore = pmu_is_uncore(dirfd, name);
+ if (pmu->is_uncore)
+ pmu->id = pmu_id(name);
+ pmu->max_precise = pmu_max_precise(dirfd, pmu);
+ pmu->events_table = perf_pmu__find_events_table(pmu);
+ pmu_add_sys_aliases(pmu);
+ list_add_tail(&pmu->list, pmus);
+
+ pmu->default_config = perf_pmu__get_default_config(pmu);
+
+ return pmu;
+err:
+ zfree(&pmu->name);
+ free(pmu);
+ return NULL;
+}
+
+/* Creates the PMU when sysfs scanning fails. */
+struct perf_pmu *perf_pmu__create_placeholder_core_pmu(struct list_head *core_pmus)
+{
+ struct perf_pmu *pmu = zalloc(sizeof(*pmu));
+
+ if (!pmu)
+ return NULL;
+
+ pmu->name = strdup("cpu");
+ if (!pmu->name) {
+ free(pmu);
+ return NULL;
+ }
+
+ pmu->is_core = true;
+ pmu->type = PERF_TYPE_RAW;
+ pmu->cpus = cpu_map__online();
+
+ INIT_LIST_HEAD(&pmu->format);
+ INIT_LIST_HEAD(&pmu->aliases);
+ INIT_LIST_HEAD(&pmu->caps);
+ list_add_tail(&pmu->list, core_pmus);
+ return pmu;
+}
+
+void perf_pmu__warn_invalid_formats(struct perf_pmu *pmu)
+{
+ struct perf_pmu_format *format;
+
+ if (pmu->formats_checked)
+ return;
+
+ pmu->formats_checked = true;
+
+ /* fake pmu doesn't have format list */
+ if (pmu == &perf_pmu__fake)
+ return;
+
+ list_for_each_entry(format, &pmu->format, list) {
+ perf_pmu_format__load(pmu, format);
+ if (format->value >= PERF_PMU_FORMAT_VALUE_CONFIG_END) {
+ pr_warning("WARNING: '%s' format '%s' requires 'perf_event_attr::config%d'"
+ "which is not supported by this version of perf!\n",
+ pmu->name, format->name, format->value);
+ return;
+ }
+ }
+}
+
+bool evsel__is_aux_event(const struct evsel *evsel)
+{
+ struct perf_pmu *pmu = evsel__find_pmu(evsel);
+
+ return pmu && pmu->auxtrace;
+}
+
+/*
+ * Set @config_name to @val as long as the user hasn't already set or cleared it
+ * by passing a config term on the command line.
+ *
+ * @val is the value to put into the bits specified by @config_name rather than
+ * the bit pattern. It is shifted into position by this function, so to set
+ * something to true, pass 1 for val rather than a pre shifted value.
+ */
+#define field_prep(_mask, _val) (((_val) << (ffsll(_mask) - 1)) & (_mask))
+void evsel__set_config_if_unset(struct perf_pmu *pmu, struct evsel *evsel,
+ const char *config_name, u64 val)
+{
+ u64 user_bits = 0, bits;
+ struct evsel_config_term *term = evsel__get_config_term(evsel, CFG_CHG);
+
+ if (term)
+ user_bits = term->val.cfg_chg;
+
+ bits = perf_pmu__format_bits(pmu, config_name);
+
+ /* Do nothing if the user changed the value */
+ if (bits & user_bits)
+ return;
+
+ /* Otherwise replace it */
+ evsel->core.attr.config &= ~bits;
+ evsel->core.attr.config |= field_prep(bits, val);
+}
+
+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 perf_pmu *pmu, const char *name)
+{
+ struct perf_pmu_format *format = pmu_find_format(&pmu->format, 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 perf_pmu *pmu, const char *name)
+{
+ struct perf_pmu_format *format = pmu_find_format(&pmu->format, name);
+
+ if (!format)
+ return -1;
+
+ perf_pmu_format__load(pmu, format);
+ return format->value;
+}
+
+/*
+ * Sets value based on the format definition (format parameter)
+ * and unformatted 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 int 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(struct perf_pmu *pmu,
+ 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(&pmu->format, term->config);
+ if (!format) {
+ char *pmu_term = pmu_formats_string(&pmu->format);
+ 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_error__handle(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;
+ }
+ perf_pmu_format__load(pmu, format);
+ 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;
+ case PERF_PMU_FORMAT_VALUE_CONFIG3:
+ vp = &attr->config3;
+ 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_error__handle(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_error__handle(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_error__handle(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(struct perf_pmu *pmu,
+ 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, 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;
+
+ return perf_pmu__config_terms(pmu, 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;
+ const char *name;
+
+ if (parse_events__is_hardcoded_term(term))
+ return NULL;
+
+ if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) {
+ if (!term->no_value)
+ 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;
+ }
+
+ alias = perf_pmu__find_alias(pmu, name, /*load=*/ true);
+ if (alias || pmu->cpu_aliases_added)
+ return alias;
+
+ /* Alias doesn't exist, try to get it from the json events. */
+ if (pmu->events_table &&
+ pmu_events_table__find_event(pmu->events_table, pmu, name,
+ pmu_add_cpu_aliases_map_callback,
+ pmu) == 0) {
+ alias = perf_pmu__find_alias(pmu, name, /*load=*/ false);
+ }
+ return alias;
+}
+
+
+static int check_info_data(struct perf_pmu *pmu,
+ struct perf_pmu_alias *alias,
+ struct perf_pmu_info *info,
+ struct parse_events_error *err,
+ int column)
+{
+ read_alias_info(pmu, alias);
+ /*
+ * 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]) {
+ parse_events_error__handle(err, column,
+ strdup("Attempt to set event's unit twice"),
+ NULL);
+ return -EINVAL;
+ }
+ if (info->scale && alias->scale) {
+ parse_events_error__handle(err, column,
+ strdup("Attempt to set event's scale twice"),
+ NULL);
+ return -EINVAL;
+ }
+ if (info->snapshot && alias->snapshot) {
+ parse_events_error__handle(err, column,
+ strdup("Attempt to set event snapshot twice"),
+ NULL);
+ 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_error *err)
+{
+ 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;
+
+ 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) {
+ parse_events_error__handle(err, term->err_term,
+ strdup("Failure to duplicate terms"),
+ NULL);
+ return ret;
+ }
+
+ ret = check_info_data(pmu, alias, info, err, term->err_term);
+ if (ret)
+ return ret;
+
+ if (alias->per_pkg)
+ info->per_pkg = true;
+
+ list_del_init(&term->list);
+ parse_events_term__delete(term);
+ }
+
+ /*
+ * if no unit or scale found in 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;
+}
+
+struct find_event_args {
+ const char *event;
+ void *state;
+ pmu_event_callback cb;
+};
+
+static int find_event_callback(void *state, struct pmu_event_info *info)
+{
+ struct find_event_args *args = state;
+
+ if (!strcmp(args->event, info->name))
+ return args->cb(args->state, info);
+
+ return 0;
+}
+
+int perf_pmu__find_event(struct perf_pmu *pmu, const char *event, void *state, pmu_event_callback cb)
+{
+ struct find_event_args args = {
+ .event = event,
+ .state = state,
+ .cb = cb,
+ };
+
+ /* Sub-optimal, but function is only used by tests. */
+ return perf_pmu__for_each_event(pmu, /*skip_duplicate_pmus=*/ false,
+ &args, find_event_callback);
+}
+
+static 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);
+ zfree(&fmt->name);
+ free(fmt);
+ }
+}
+
+bool perf_pmu__has_format(const struct perf_pmu *pmu, const char *name)
+{
+ struct perf_pmu_format *format;
+
+ list_for_each_entry(format, &pmu->format, list) {
+ if (!strcmp(format->name, name))
+ return true;
+ }
+ return false;
+}
+
+bool is_pmu_core(const char *name)
+{
+ return !strcmp(name, "cpu") || !strcmp(name, "cpum_cf") || is_sysfs_pmu_core(name);
+}
+
+bool perf_pmu__supports_legacy_cache(const struct perf_pmu *pmu)
+{
+ return pmu->is_core;
+}
+
+bool perf_pmu__auto_merge_stats(const struct perf_pmu *pmu)
+{
+ return !pmu->is_core || perf_pmus__num_core_pmus() == 1;
+}
+
+bool perf_pmu__have_event(struct perf_pmu *pmu, const char *name)
+{
+ if (perf_pmu__find_alias(pmu, name, /*load=*/ true) != NULL)
+ return true;
+ if (pmu->cpu_aliases_added || !pmu->events_table)
+ return false;
+ return pmu_events_table__find_event(pmu->events_table, pmu, name, NULL, NULL) == 0;
+}
+
+size_t perf_pmu__num_events(struct perf_pmu *pmu)
+{
+ size_t nr;
+
+ if (!pmu->sysfs_aliases_loaded)
+ pmu_aliases_parse(pmu);
+
+ nr = pmu->sysfs_aliases;
+
+ if (pmu->cpu_aliases_added)
+ nr += pmu->loaded_json_aliases;
+ else if (pmu->events_table)
+ nr += pmu_events_table__num_events(pmu->events_table, pmu) - pmu->loaded_json_aliases;
+
+ return pmu->selectable ? nr + 1 : nr;
+}
+
+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, const struct perf_pmu *pmu,
+ const struct perf_pmu_alias *alias, bool skip_duplicate_pmus)
+{
+ struct parse_events_term *term;
+ int pmu_name_len = skip_duplicate_pmus
+ ? pmu_name_len_no_suffix(pmu->name, /*num=*/NULL)
+ : (int)strlen(pmu->name);
+ int used = snprintf(buf, len, "%.*s/%s", pmu_name_len, 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;
+}
+
+int perf_pmu__for_each_event(struct perf_pmu *pmu, bool skip_duplicate_pmus,
+ void *state, pmu_event_callback cb)
+{
+ char buf[1024];
+ struct perf_pmu_alias *event;
+ struct pmu_event_info info = {
+ .pmu = pmu,
+ };
+ int ret = 0;
+ struct strbuf sb;
+
+ strbuf_init(&sb, /*hint=*/ 0);
+ pmu_add_cpu_aliases(pmu);
+ list_for_each_entry(event, &pmu->aliases, list) {
+ size_t buf_used;
+
+ info.pmu_name = event->pmu_name ?: pmu->name;
+ info.alias = NULL;
+ if (event->desc) {
+ info.name = event->name;
+ buf_used = 0;
+ } else {
+ info.name = format_alias(buf, sizeof(buf), pmu, event,
+ skip_duplicate_pmus);
+ if (pmu->is_core) {
+ info.alias = info.name;
+ info.name = event->name;
+ }
+ buf_used = strlen(buf) + 1;
+ }
+ info.scale_unit = NULL;
+ if (strlen(event->unit) || event->scale != 1.0) {
+ info.scale_unit = buf + buf_used;
+ buf_used += snprintf(buf + buf_used, sizeof(buf) - buf_used,
+ "%G%s", event->scale, event->unit) + 1;
+ }
+ info.desc = event->desc;
+ info.long_desc = event->long_desc;
+ info.encoding_desc = buf + buf_used;
+ parse_events_term__to_strbuf(&event->terms, &sb);
+ buf_used += snprintf(buf + buf_used, sizeof(buf) - buf_used,
+ "%s/%s/", info.pmu_name, sb.buf) + 1;
+ info.topic = event->topic;
+ info.str = sb.buf;
+ info.deprecated = event->deprecated;
+ ret = cb(state, &info);
+ if (ret)
+ goto out;
+ strbuf_setlen(&sb, /*len=*/ 0);
+ }
+ if (pmu->selectable) {
+ info.name = buf;
+ snprintf(buf, sizeof(buf), "%s//", pmu->name);
+ info.alias = NULL;
+ info.scale_unit = NULL;
+ info.desc = NULL;
+ info.long_desc = NULL;
+ info.encoding_desc = NULL;
+ info.topic = NULL;
+ info.pmu_name = pmu->name;
+ info.deprecated = false;
+ ret = cb(state, &info);
+ }
+out:
+ strbuf_release(&sb);
+ return ret;
+}
+
+bool pmu__name_match(const struct perf_pmu *pmu, const char *pmu_name)
+{
+ return !strcmp(pmu->name, pmu_name) ||
+ (pmu->is_uncore && pmu_uncore_alias_match(pmu_name, pmu->name)) ||
+ /*
+ * jevents and tests use default_core as a marker for any core
+ * PMU as the PMU name varies across architectures.
+ */
+ (pmu->is_core && !strcmp(pmu_name, "default_core"));
+}
+
+bool perf_pmu__is_software(const struct perf_pmu *pmu)
+{
+ if (pmu->is_core || pmu->is_uncore || pmu->auxtrace)
+ return false;
+ switch (pmu->type) {
+ case PERF_TYPE_HARDWARE: return false;
+ case PERF_TYPE_SOFTWARE: return true;
+ case PERF_TYPE_TRACEPOINT: return true;
+ case PERF_TYPE_HW_CACHE: return false;
+ case PERF_TYPE_RAW: return false;
+ case PERF_TYPE_BREAKPOINT: return true;
+ default: break;
+ }
+ return !strcmp(pmu->name, "kprobe") || !strcmp(pmu->name, "uprobe");
+}
+
+FILE *perf_pmu__open_file(struct perf_pmu *pmu, const char *name)
+{
+ char path[PATH_MAX];
+
+ if (!perf_pmu__pathname_scnprintf(path, sizeof(path), pmu->name, name) ||
+ !file_available(path))
+ return NULL;
+
+ return fopen(path, "r");
+}
+
+FILE *perf_pmu__open_file_at(struct perf_pmu *pmu, int dirfd, const char *name)
+{
+ int fd;
+
+ fd = perf_pmu__pathname_fd(dirfd, pmu->name, name, O_RDONLY);
+ if (fd < 0)
+ return NULL;
+
+ return fdopen(fd, "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;
+}
+
+int perf_pmu__scan_file_at(struct perf_pmu *pmu, int dirfd, const char *name,
+ const char *fmt, ...)
+{
+ va_list args;
+ FILE *file;
+ int ret = EOF;
+
+ va_start(args, fmt);
+ file = perf_pmu__open_file_at(pmu, dirfd, name);
+ if (file) {
+ ret = vfscanf(file, fmt, args);
+ fclose(file);
+ }
+ va_end(args);
+ return ret;
+}
+
+bool perf_pmu__file_exists(struct perf_pmu *pmu, const char *name)
+{
+ char path[PATH_MAX];
+
+ if (!perf_pmu__pathname_scnprintf(path, sizeof(path), pmu->name, name))
+ return false;
+
+ return file_available(path);
+}
+
+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;
+}
+
+static void perf_pmu__del_caps(struct perf_pmu *pmu)
+{
+ struct perf_pmu_caps *caps, *tmp;
+
+ list_for_each_entry_safe(caps, tmp, &pmu->caps, list) {
+ list_del(&caps->list);
+ zfree(&caps->name);
+ zfree(&caps->value);
+ free(caps);
+ }
+}
+
+/*
+ * 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];
+ DIR *caps_dir;
+ struct dirent *evt_ent;
+ int caps_fd;
+
+ if (pmu->caps_initialized)
+ return pmu->nr_caps;
+
+ pmu->nr_caps = 0;
+
+ if (!perf_pmu__pathname_scnprintf(caps_path, sizeof(caps_path), pmu->name, "caps"))
+ return -1;
+
+ if (stat(caps_path, &st) < 0) {
+ pmu->caps_initialized = true;
+ return 0; /* no error if caps does not exist */
+ }
+
+ caps_dir = opendir(caps_path);
+ if (!caps_dir)
+ return -EINVAL;
+
+ caps_fd = dirfd(caps_dir);
+
+ while ((evt_ent = readdir(caps_dir)) != NULL) {
+ char *name = evt_ent->d_name;
+ char value[128];
+ FILE *file;
+ int fd;
+
+ if (!strcmp(name, ".") || !strcmp(name, ".."))
+ continue;
+
+ fd = openat(caps_fd, name, O_RDONLY);
+ if (fd == -1)
+ continue;
+ file = fdopen(fd, "r");
+ if (!file) {
+ close(fd);
+ continue;
+ }
+
+ if (!fgets(value, sizeof(value), file) ||
+ (perf_pmu__new_caps(&pmu->caps, name, value) < 0)) {
+ fclose(file);
+ continue;
+ }
+
+ pmu->nr_caps++;
+ fclose(file);
+ }
+
+ closedir(caps_dir);
+
+ pmu->caps_initialized = true;
+ return pmu->nr_caps;
+}
+
+static void perf_pmu__compute_config_masks(struct perf_pmu *pmu)
+{
+ struct perf_pmu_format *format;
+
+ if (pmu->config_masks_computed)
+ return;
+
+ list_for_each_entry(format, &pmu->format, list) {
+ unsigned int i;
+ __u64 *mask;
+
+ if (format->value >= PERF_PMU_FORMAT_VALUE_CONFIG_END)
+ continue;
+
+ pmu->config_masks_present = true;
+ mask = &pmu->config_masks[format->value];
+
+ for_each_set_bit(i, format->bits, PERF_PMU_FORMAT_BITS)
+ *mask |= 1ULL << i;
+ }
+ pmu->config_masks_computed = true;
+}
+
+void perf_pmu__warn_invalid_config(struct perf_pmu *pmu, __u64 config,
+ const char *name, int config_num,
+ const char *config_name)
+{
+ __u64 bits;
+ char buf[100];
+
+ perf_pmu__compute_config_masks(pmu);
+
+ /*
+ * Kernel doesn't export any valid format bits.
+ */
+ if (!pmu->config_masks_present)
+ return;
+
+ bits = config & ~pmu->config_masks[config_num];
+ if (bits == 0)
+ return;
+
+ bitmap_scnprintf((unsigned long *)&bits, sizeof(bits) * 8, buf, sizeof(buf));
+
+ pr_warning("WARNING: event '%s' not valid (bits %s of %s "
+ "'%llx' not supported by kernel)!\n",
+ name ?: "N/A", buf, config_name, config);
+}
+
+int perf_pmu__match(const char *pattern, const char *name, const char *tok)
+{
+ if (!name)
+ return -1;
+
+ if (fnmatch(pattern, name, 0))
+ return -1;
+
+ if (tok && !perf_pmu__match_ignoring_suffix(name, tok))
+ return -1;
+
+ return 0;
+}
+
+double __weak perf_pmu__cpu_slots_per_cycle(void)
+{
+ return NAN;
+}
+
+int perf_pmu__event_source_devices_scnprintf(char *pathname, size_t size)
+{
+ const char *sysfs = sysfs__mountpoint();
+
+ if (!sysfs)
+ return 0;
+ return scnprintf(pathname, size, "%s/bus/event_source/devices/", sysfs);
+}
+
+int perf_pmu__event_source_devices_fd(void)
+{
+ char path[PATH_MAX];
+ const char *sysfs = sysfs__mountpoint();
+
+ if (!sysfs)
+ return -1;
+
+ scnprintf(path, sizeof(path), "%s/bus/event_source/devices/", sysfs);
+ return open(path, O_DIRECTORY);
+}
+
+/*
+ * Fill 'buf' with the path to a file or folder in 'pmu_name' in
+ * sysfs. For example if pmu_name = "cs_etm" and 'filename' = "format"
+ * then pathname will be filled with
+ * "/sys/bus/event_source/devices/cs_etm/format"
+ *
+ * Return 0 if the sysfs mountpoint couldn't be found, if no characters were
+ * written or if the buffer size is exceeded.
+ */
+int perf_pmu__pathname_scnprintf(char *buf, size_t size,
+ const char *pmu_name, const char *filename)
+{
+ size_t len;
+
+ len = perf_pmu__event_source_devices_scnprintf(buf, size);
+ if (!len || (len + strlen(pmu_name) + strlen(filename) + 1) >= size)
+ return 0;
+
+ return scnprintf(buf + len, size - len, "%s/%s", pmu_name, filename);
+}
+
+int perf_pmu__pathname_fd(int dirfd, const char *pmu_name, const char *filename, int flags)
+{
+ char path[PATH_MAX];
+
+ scnprintf(path, sizeof(path), "%s/%s", pmu_name, filename);
+ return openat(dirfd, path, flags);
+}
+
+void perf_pmu__delete(struct perf_pmu *pmu)
+{
+ perf_pmu__del_formats(&pmu->format);
+ perf_pmu__del_aliases(pmu);
+ perf_pmu__del_caps(pmu);
+
+ perf_cpu_map__put(pmu->cpus);
+
+ zfree(&pmu->default_config);
+ zfree(&pmu->name);
+ zfree(&pmu->alias_name);
+ zfree(&pmu->id);
+ free(pmu);
+}
+
+struct perf_pmu *pmu__find_core_pmu(void)
+{
+ struct perf_pmu *pmu = NULL;
+
+ while ((pmu = perf_pmus__scan_core(pmu))) {
+ /*
+ * The cpumap should cover all CPUs. Otherwise, some CPUs may
+ * not support some events or have different event IDs.
+ */
+ if (RC_CHK_ACCESS(pmu->cpus)->nr != cpu__max_cpu().cpu)
+ return NULL;
+
+ return pmu;
+ }
+ return NULL;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 15:30:32 +0000