Orange Pi5 kernel

// 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;
}