Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 1 | #include <linux/list.h> |
Sukadev Bhattiprolu | c5de47f | 2015-06-10 00:25:07 -0700 | [diff] [blame] | 2 | #include <linux/compiler.h> |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 3 | #include <sys/types.h> |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 4 | #include <unistd.h> |
| 5 | #include <stdio.h> |
Adrian Hunter | dc0a620 | 2014-07-31 09:00:49 +0300 | [diff] [blame] | 6 | #include <stdbool.h> |
Adrian Hunter | 7d4bdab | 2014-07-31 09:00:50 +0300 | [diff] [blame] | 7 | #include <stdarg.h> |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 8 | #include <dirent.h> |
Borislav Petkov | cd0cfad | 2013-12-09 17:14:24 +0100 | [diff] [blame] | 9 | #include <api/fs/fs.h> |
Stephane Eranian | 410136f | 2013-11-12 17:58:49 +0100 | [diff] [blame] | 10 | #include <locale.h> |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 11 | #include "util.h" |
| 12 | #include "pmu.h" |
| 13 | #include "parse-events.h" |
Yan, Zheng | 7ae92e7 | 2012-09-10 15:53:50 +0800 | [diff] [blame] | 14 | #include "cpumap.h" |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 15 | |
Arnaldo Carvalho de Melo | ab1bf653 | 2013-01-18 17:05:09 -0300 | [diff] [blame] | 16 | struct perf_pmu_format { |
| 17 | char *name; |
| 18 | int value; |
| 19 | DECLARE_BITMAP(bits, PERF_PMU_FORMAT_BITS); |
| 20 | struct list_head list; |
| 21 | }; |
| 22 | |
Robert Richter | 50a9667 | 2012-08-16 21:10:24 +0200 | [diff] [blame] | 23 | #define EVENT_SOURCE_DEVICE_PATH "/bus/event_source/devices/" |
| 24 | |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 25 | int perf_pmu_parse(struct list_head *list, char *name); |
| 26 | extern FILE *perf_pmu_in; |
| 27 | |
| 28 | static LIST_HEAD(pmus); |
| 29 | |
| 30 | /* |
| 31 | * Parse & process all the sysfs attributes located under |
| 32 | * the directory specified in 'dir' parameter. |
| 33 | */ |
Jiri Olsa | cff7f95 | 2012-11-10 01:46:50 +0100 | [diff] [blame] | 34 | int perf_pmu__format_parse(char *dir, struct list_head *head) |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 35 | { |
| 36 | struct dirent *evt_ent; |
| 37 | DIR *format_dir; |
| 38 | int ret = 0; |
| 39 | |
| 40 | format_dir = opendir(dir); |
| 41 | if (!format_dir) |
| 42 | return -EINVAL; |
| 43 | |
| 44 | while (!ret && (evt_ent = readdir(format_dir))) { |
| 45 | char path[PATH_MAX]; |
| 46 | char *name = evt_ent->d_name; |
| 47 | FILE *file; |
| 48 | |
| 49 | if (!strcmp(name, ".") || !strcmp(name, "..")) |
| 50 | continue; |
| 51 | |
| 52 | snprintf(path, PATH_MAX, "%s/%s", dir, name); |
| 53 | |
| 54 | ret = -EINVAL; |
| 55 | file = fopen(path, "r"); |
| 56 | if (!file) |
| 57 | break; |
| 58 | |
| 59 | perf_pmu_in = file; |
| 60 | ret = perf_pmu_parse(head, name); |
| 61 | fclose(file); |
| 62 | } |
| 63 | |
| 64 | closedir(format_dir); |
| 65 | return ret; |
| 66 | } |
| 67 | |
| 68 | /* |
| 69 | * Reading/parsing the default pmu format definition, which should be |
| 70 | * located at: |
| 71 | * /sys/bus/event_source/devices/<dev>/format as sysfs group attributes. |
| 72 | */ |
Adrian Hunter | b6b96fb | 2013-07-04 16:20:25 +0300 | [diff] [blame] | 73 | static int pmu_format(const char *name, struct list_head *format) |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 74 | { |
| 75 | struct stat st; |
| 76 | char path[PATH_MAX]; |
Arnaldo Carvalho de Melo | cf38fad | 2013-11-05 14:48:50 -0300 | [diff] [blame] | 77 | const char *sysfs = sysfs__mountpoint(); |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 78 | |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 79 | if (!sysfs) |
| 80 | return -1; |
| 81 | |
| 82 | snprintf(path, PATH_MAX, |
Robert Richter | 50a9667 | 2012-08-16 21:10:24 +0200 | [diff] [blame] | 83 | "%s" EVENT_SOURCE_DEVICE_PATH "%s/format", sysfs, name); |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 84 | |
| 85 | if (stat(path, &st) < 0) |
Robert Richter | 9bc8f9f | 2012-06-14 22:38:37 +0200 | [diff] [blame] | 86 | return 0; /* no error if format does not exist */ |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 87 | |
Jiri Olsa | cff7f95 | 2012-11-10 01:46:50 +0100 | [diff] [blame] | 88 | if (perf_pmu__format_parse(path, format)) |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 89 | return -1; |
| 90 | |
| 91 | return 0; |
| 92 | } |
| 93 | |
Stephane Eranian | 410136f | 2013-11-12 17:58:49 +0100 | [diff] [blame] | 94 | static int perf_pmu__parse_scale(struct perf_pmu_alias *alias, char *dir, char *name) |
| 95 | { |
| 96 | struct stat st; |
| 97 | ssize_t sret; |
| 98 | char scale[128]; |
| 99 | int fd, ret = -1; |
| 100 | char path[PATH_MAX]; |
Stephane Eranian | 8a39889 | 2014-01-17 16:34:05 +0100 | [diff] [blame] | 101 | const char *lc; |
Stephane Eranian | 410136f | 2013-11-12 17:58:49 +0100 | [diff] [blame] | 102 | |
| 103 | snprintf(path, PATH_MAX, "%s/%s.scale", dir, name); |
| 104 | |
| 105 | fd = open(path, O_RDONLY); |
| 106 | if (fd == -1) |
| 107 | return -1; |
| 108 | |
| 109 | if (fstat(fd, &st) < 0) |
| 110 | goto error; |
| 111 | |
| 112 | sret = read(fd, scale, sizeof(scale)-1); |
| 113 | if (sret < 0) |
| 114 | goto error; |
| 115 | |
Madhavan Srinivasan | 9ecae06 | 2015-05-31 11:36:23 +0530 | [diff] [blame] | 116 | if (scale[sret - 1] == '\n') |
| 117 | scale[sret - 1] = '\0'; |
| 118 | else |
| 119 | scale[sret] = '\0'; |
| 120 | |
Stephane Eranian | 410136f | 2013-11-12 17:58:49 +0100 | [diff] [blame] | 121 | /* |
| 122 | * save current locale |
| 123 | */ |
| 124 | lc = setlocale(LC_NUMERIC, NULL); |
| 125 | |
| 126 | /* |
| 127 | * force to C locale to ensure kernel |
| 128 | * scale string is converted correctly. |
| 129 | * kernel uses default C locale. |
| 130 | */ |
| 131 | setlocale(LC_NUMERIC, "C"); |
| 132 | |
| 133 | alias->scale = strtod(scale, NULL); |
| 134 | |
| 135 | /* restore locale */ |
| 136 | setlocale(LC_NUMERIC, lc); |
| 137 | |
| 138 | ret = 0; |
| 139 | error: |
| 140 | close(fd); |
| 141 | return ret; |
| 142 | } |
| 143 | |
| 144 | static int perf_pmu__parse_unit(struct perf_pmu_alias *alias, char *dir, char *name) |
| 145 | { |
| 146 | char path[PATH_MAX]; |
| 147 | ssize_t sret; |
| 148 | int fd; |
| 149 | |
| 150 | snprintf(path, PATH_MAX, "%s/%s.unit", dir, name); |
| 151 | |
| 152 | fd = open(path, O_RDONLY); |
| 153 | if (fd == -1) |
| 154 | return -1; |
| 155 | |
| 156 | sret = read(fd, alias->unit, UNIT_MAX_LEN); |
| 157 | if (sret < 0) |
| 158 | goto error; |
| 159 | |
| 160 | close(fd); |
| 161 | |
Madhavan Srinivasan | 9ecae06 | 2015-05-31 11:36:23 +0530 | [diff] [blame] | 162 | if (alias->unit[sret - 1] == '\n') |
| 163 | alias->unit[sret - 1] = '\0'; |
| 164 | else |
| 165 | alias->unit[sret] = '\0'; |
Stephane Eranian | 410136f | 2013-11-12 17:58:49 +0100 | [diff] [blame] | 166 | |
| 167 | return 0; |
| 168 | error: |
| 169 | close(fd); |
| 170 | alias->unit[0] = '\0'; |
| 171 | return -1; |
| 172 | } |
| 173 | |
Matt Fleming | 044330c | 2014-11-21 10:31:12 +0100 | [diff] [blame] | 174 | static int |
| 175 | perf_pmu__parse_per_pkg(struct perf_pmu_alias *alias, char *dir, char *name) |
| 176 | { |
| 177 | char path[PATH_MAX]; |
| 178 | int fd; |
| 179 | |
| 180 | snprintf(path, PATH_MAX, "%s/%s.per-pkg", dir, name); |
| 181 | |
| 182 | fd = open(path, O_RDONLY); |
| 183 | if (fd == -1) |
| 184 | return -1; |
| 185 | |
| 186 | close(fd); |
| 187 | |
| 188 | alias->per_pkg = true; |
| 189 | return 0; |
| 190 | } |
| 191 | |
Jiri Olsa | 1d9e446 | 2014-11-21 10:31:13 +0100 | [diff] [blame] | 192 | static int perf_pmu__parse_snapshot(struct perf_pmu_alias *alias, |
| 193 | char *dir, char *name) |
| 194 | { |
| 195 | char path[PATH_MAX]; |
| 196 | int fd; |
| 197 | |
| 198 | snprintf(path, PATH_MAX, "%s/%s.snapshot", dir, name); |
| 199 | |
| 200 | fd = open(path, O_RDONLY); |
| 201 | if (fd == -1) |
| 202 | return -1; |
| 203 | |
| 204 | alias->snapshot = true; |
| 205 | close(fd); |
| 206 | return 0; |
| 207 | } |
| 208 | |
Sukadev Bhattiprolu | 70c646e | 2015-06-10 00:25:08 -0700 | [diff] [blame] | 209 | static int __perf_pmu__new_alias(struct list_head *list, char *dir, char *name, |
| 210 | char *desc __maybe_unused, char *val) |
Zheng Yan | a6146d5 | 2012-06-15 14:31:41 +0800 | [diff] [blame] | 211 | { |
Arnaldo Carvalho de Melo | 5c6ccc3 | 2013-01-18 16:54:00 -0300 | [diff] [blame] | 212 | struct perf_pmu_alias *alias; |
Zheng Yan | a6146d5 | 2012-06-15 14:31:41 +0800 | [diff] [blame] | 213 | int ret; |
| 214 | |
Zheng Yan | a6146d5 | 2012-06-15 14:31:41 +0800 | [diff] [blame] | 215 | alias = malloc(sizeof(*alias)); |
| 216 | if (!alias) |
| 217 | return -ENOMEM; |
| 218 | |
| 219 | INIT_LIST_HEAD(&alias->terms); |
Stephane Eranian | 410136f | 2013-11-12 17:58:49 +0100 | [diff] [blame] | 220 | alias->scale = 1.0; |
| 221 | alias->unit[0] = '\0'; |
Matt Fleming | 044330c | 2014-11-21 10:31:12 +0100 | [diff] [blame] | 222 | alias->per_pkg = false; |
Stephane Eranian | 410136f | 2013-11-12 17:58:49 +0100 | [diff] [blame] | 223 | |
Sukadev Bhattiprolu | 70c646e | 2015-06-10 00:25:08 -0700 | [diff] [blame] | 224 | ret = parse_events_terms(&alias->terms, val); |
Zheng Yan | a6146d5 | 2012-06-15 14:31:41 +0800 | [diff] [blame] | 225 | if (ret) { |
Sukadev Bhattiprolu | 70c646e | 2015-06-10 00:25:08 -0700 | [diff] [blame] | 226 | pr_err("Cannot parse alias %s: %d\n", val, ret); |
Zheng Yan | a6146d5 | 2012-06-15 14:31:41 +0800 | [diff] [blame] | 227 | free(alias); |
| 228 | return ret; |
| 229 | } |
| 230 | |
| 231 | alias->name = strdup(name); |
Sukadev Bhattiprolu | 70c646e | 2015-06-10 00:25:08 -0700 | [diff] [blame] | 232 | if (dir) { |
| 233 | /* |
| 234 | * load unit name and scale if available |
| 235 | */ |
| 236 | perf_pmu__parse_unit(alias, dir, name); |
| 237 | perf_pmu__parse_scale(alias, dir, name); |
| 238 | perf_pmu__parse_per_pkg(alias, dir, name); |
| 239 | perf_pmu__parse_snapshot(alias, dir, name); |
| 240 | } |
Stephane Eranian | 410136f | 2013-11-12 17:58:49 +0100 | [diff] [blame] | 241 | |
Zheng Yan | a6146d5 | 2012-06-15 14:31:41 +0800 | [diff] [blame] | 242 | list_add_tail(&alias->list, list); |
Stephane Eranian | 410136f | 2013-11-12 17:58:49 +0100 | [diff] [blame] | 243 | |
Zheng Yan | a6146d5 | 2012-06-15 14:31:41 +0800 | [diff] [blame] | 244 | return 0; |
| 245 | } |
| 246 | |
Sukadev Bhattiprolu | 70c646e | 2015-06-10 00:25:08 -0700 | [diff] [blame] | 247 | static int perf_pmu__new_alias(struct list_head *list, char *dir, char *name, FILE *file) |
| 248 | { |
| 249 | char buf[256]; |
| 250 | int ret; |
| 251 | |
| 252 | ret = fread(buf, 1, sizeof(buf), file); |
| 253 | if (ret == 0) |
| 254 | return -EINVAL; |
| 255 | |
| 256 | buf[ret] = 0; |
| 257 | |
| 258 | return __perf_pmu__new_alias(list, dir, name, NULL, buf); |
| 259 | } |
| 260 | |
Matt Fleming | 46441bd | 2014-09-24 15:04:06 +0100 | [diff] [blame] | 261 | static inline bool pmu_alias_info_file(char *name) |
| 262 | { |
| 263 | size_t len; |
| 264 | |
| 265 | len = strlen(name); |
| 266 | if (len > 5 && !strcmp(name + len - 5, ".unit")) |
| 267 | return true; |
| 268 | if (len > 6 && !strcmp(name + len - 6, ".scale")) |
| 269 | return true; |
Matt Fleming | 044330c | 2014-11-21 10:31:12 +0100 | [diff] [blame] | 270 | if (len > 8 && !strcmp(name + len - 8, ".per-pkg")) |
| 271 | return true; |
Jiri Olsa | 1d9e446 | 2014-11-21 10:31:13 +0100 | [diff] [blame] | 272 | if (len > 9 && !strcmp(name + len - 9, ".snapshot")) |
| 273 | return true; |
Matt Fleming | 46441bd | 2014-09-24 15:04:06 +0100 | [diff] [blame] | 274 | |
| 275 | return false; |
| 276 | } |
| 277 | |
Zheng Yan | a6146d5 | 2012-06-15 14:31:41 +0800 | [diff] [blame] | 278 | /* |
| 279 | * Process all the sysfs attributes located under the directory |
| 280 | * specified in 'dir' parameter. |
| 281 | */ |
| 282 | static int pmu_aliases_parse(char *dir, struct list_head *head) |
| 283 | { |
| 284 | struct dirent *evt_ent; |
| 285 | DIR *event_dir; |
| 286 | int ret = 0; |
| 287 | |
| 288 | event_dir = opendir(dir); |
| 289 | if (!event_dir) |
| 290 | return -EINVAL; |
| 291 | |
| 292 | while (!ret && (evt_ent = readdir(event_dir))) { |
| 293 | char path[PATH_MAX]; |
| 294 | char *name = evt_ent->d_name; |
| 295 | FILE *file; |
| 296 | |
| 297 | if (!strcmp(name, ".") || !strcmp(name, "..")) |
| 298 | continue; |
| 299 | |
Stephane Eranian | 410136f | 2013-11-12 17:58:49 +0100 | [diff] [blame] | 300 | /* |
Matt Fleming | 46441bd | 2014-09-24 15:04:06 +0100 | [diff] [blame] | 301 | * skip info files parsed in perf_pmu__new_alias() |
Stephane Eranian | 410136f | 2013-11-12 17:58:49 +0100 | [diff] [blame] | 302 | */ |
Matt Fleming | 46441bd | 2014-09-24 15:04:06 +0100 | [diff] [blame] | 303 | if (pmu_alias_info_file(name)) |
Stephane Eranian | 410136f | 2013-11-12 17:58:49 +0100 | [diff] [blame] | 304 | continue; |
| 305 | |
Zheng Yan | a6146d5 | 2012-06-15 14:31:41 +0800 | [diff] [blame] | 306 | snprintf(path, PATH_MAX, "%s/%s", dir, name); |
| 307 | |
| 308 | ret = -EINVAL; |
| 309 | file = fopen(path, "r"); |
| 310 | if (!file) |
| 311 | break; |
Stephane Eranian | 410136f | 2013-11-12 17:58:49 +0100 | [diff] [blame] | 312 | |
| 313 | ret = perf_pmu__new_alias(head, dir, name, file); |
Zheng Yan | a6146d5 | 2012-06-15 14:31:41 +0800 | [diff] [blame] | 314 | fclose(file); |
| 315 | } |
| 316 | |
| 317 | closedir(event_dir); |
| 318 | return ret; |
| 319 | } |
| 320 | |
| 321 | /* |
| 322 | * Reading the pmu event aliases definition, which should be located at: |
| 323 | * /sys/bus/event_source/devices/<dev>/events as sysfs group attributes. |
| 324 | */ |
Adrian Hunter | b6b96fb | 2013-07-04 16:20:25 +0300 | [diff] [blame] | 325 | static int pmu_aliases(const char *name, struct list_head *head) |
Zheng Yan | a6146d5 | 2012-06-15 14:31:41 +0800 | [diff] [blame] | 326 | { |
| 327 | struct stat st; |
| 328 | char path[PATH_MAX]; |
Arnaldo Carvalho de Melo | cf38fad | 2013-11-05 14:48:50 -0300 | [diff] [blame] | 329 | const char *sysfs = sysfs__mountpoint(); |
Zheng Yan | a6146d5 | 2012-06-15 14:31:41 +0800 | [diff] [blame] | 330 | |
Zheng Yan | a6146d5 | 2012-06-15 14:31:41 +0800 | [diff] [blame] | 331 | if (!sysfs) |
| 332 | return -1; |
| 333 | |
| 334 | snprintf(path, PATH_MAX, |
| 335 | "%s/bus/event_source/devices/%s/events", sysfs, name); |
| 336 | |
| 337 | if (stat(path, &st) < 0) |
Jiri Olsa | 3fded96 | 2012-10-10 14:53:16 +0200 | [diff] [blame] | 338 | return 0; /* no error if 'events' does not exist */ |
Zheng Yan | a6146d5 | 2012-06-15 14:31:41 +0800 | [diff] [blame] | 339 | |
| 340 | if (pmu_aliases_parse(path, head)) |
| 341 | return -1; |
| 342 | |
| 343 | return 0; |
| 344 | } |
| 345 | |
Arnaldo Carvalho de Melo | 5c6ccc3 | 2013-01-18 16:54:00 -0300 | [diff] [blame] | 346 | static int pmu_alias_terms(struct perf_pmu_alias *alias, |
Zheng Yan | a6146d5 | 2012-06-15 14:31:41 +0800 | [diff] [blame] | 347 | struct list_head *terms) |
| 348 | { |
Jiri Olsa | 7c2f816 | 2014-04-16 20:49:02 +0200 | [diff] [blame] | 349 | struct parse_events_term *term, *cloned; |
Zheng Yan | a6146d5 | 2012-06-15 14:31:41 +0800 | [diff] [blame] | 350 | LIST_HEAD(list); |
| 351 | int ret; |
| 352 | |
| 353 | list_for_each_entry(term, &alias->terms, list) { |
Jiri Olsa | 7c2f816 | 2014-04-16 20:49:02 +0200 | [diff] [blame] | 354 | ret = parse_events_term__clone(&cloned, term); |
Zheng Yan | a6146d5 | 2012-06-15 14:31:41 +0800 | [diff] [blame] | 355 | if (ret) { |
| 356 | parse_events__free_terms(&list); |
| 357 | return ret; |
| 358 | } |
Jiri Olsa | 7c2f816 | 2014-04-16 20:49:02 +0200 | [diff] [blame] | 359 | list_add_tail(&cloned->list, &list); |
Zheng Yan | a6146d5 | 2012-06-15 14:31:41 +0800 | [diff] [blame] | 360 | } |
| 361 | list_splice(&list, terms); |
| 362 | return 0; |
| 363 | } |
| 364 | |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 365 | /* |
| 366 | * Reading/parsing the default pmu type value, which should be |
| 367 | * located at: |
| 368 | * /sys/bus/event_source/devices/<dev>/type as sysfs attribute. |
| 369 | */ |
Adrian Hunter | b6b96fb | 2013-07-04 16:20:25 +0300 | [diff] [blame] | 370 | static int pmu_type(const char *name, __u32 *type) |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 371 | { |
| 372 | struct stat st; |
| 373 | char path[PATH_MAX]; |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 374 | FILE *file; |
| 375 | int ret = 0; |
Arnaldo Carvalho de Melo | cf38fad | 2013-11-05 14:48:50 -0300 | [diff] [blame] | 376 | const char *sysfs = sysfs__mountpoint(); |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 377 | |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 378 | if (!sysfs) |
| 379 | return -1; |
| 380 | |
| 381 | snprintf(path, PATH_MAX, |
Robert Richter | 50a9667 | 2012-08-16 21:10:24 +0200 | [diff] [blame] | 382 | "%s" EVENT_SOURCE_DEVICE_PATH "%s/type", sysfs, name); |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 383 | |
| 384 | if (stat(path, &st) < 0) |
| 385 | return -1; |
| 386 | |
| 387 | file = fopen(path, "r"); |
| 388 | if (!file) |
| 389 | return -EINVAL; |
| 390 | |
| 391 | if (1 != fscanf(file, "%u", type)) |
| 392 | ret = -1; |
| 393 | |
| 394 | fclose(file); |
| 395 | return ret; |
| 396 | } |
| 397 | |
Robert Richter | 50a9667 | 2012-08-16 21:10:24 +0200 | [diff] [blame] | 398 | /* Add all pmus in sysfs to pmu list: */ |
| 399 | static void pmu_read_sysfs(void) |
| 400 | { |
| 401 | char path[PATH_MAX]; |
Robert Richter | 50a9667 | 2012-08-16 21:10:24 +0200 | [diff] [blame] | 402 | DIR *dir; |
| 403 | struct dirent *dent; |
Arnaldo Carvalho de Melo | cf38fad | 2013-11-05 14:48:50 -0300 | [diff] [blame] | 404 | const char *sysfs = sysfs__mountpoint(); |
Robert Richter | 50a9667 | 2012-08-16 21:10:24 +0200 | [diff] [blame] | 405 | |
Robert Richter | 50a9667 | 2012-08-16 21:10:24 +0200 | [diff] [blame] | 406 | if (!sysfs) |
| 407 | return; |
| 408 | |
| 409 | snprintf(path, PATH_MAX, |
| 410 | "%s" EVENT_SOURCE_DEVICE_PATH, sysfs); |
| 411 | |
| 412 | dir = opendir(path); |
| 413 | if (!dir) |
| 414 | return; |
| 415 | |
| 416 | while ((dent = readdir(dir))) { |
| 417 | if (!strcmp(dent->d_name, ".") || !strcmp(dent->d_name, "..")) |
| 418 | continue; |
| 419 | /* add to static LIST_HEAD(pmus): */ |
| 420 | perf_pmu__find(dent->d_name); |
| 421 | } |
| 422 | |
| 423 | closedir(dir); |
| 424 | } |
| 425 | |
Adrian Hunter | b6b96fb | 2013-07-04 16:20:25 +0300 | [diff] [blame] | 426 | static struct cpu_map *pmu_cpumask(const char *name) |
Yan, Zheng | 7ae92e7 | 2012-09-10 15:53:50 +0800 | [diff] [blame] | 427 | { |
| 428 | struct stat st; |
| 429 | char path[PATH_MAX]; |
Yan, Zheng | 7ae92e7 | 2012-09-10 15:53:50 +0800 | [diff] [blame] | 430 | FILE *file; |
| 431 | struct cpu_map *cpus; |
Arnaldo Carvalho de Melo | cf38fad | 2013-11-05 14:48:50 -0300 | [diff] [blame] | 432 | const char *sysfs = sysfs__mountpoint(); |
Yan, Zheng | 7ae92e7 | 2012-09-10 15:53:50 +0800 | [diff] [blame] | 433 | |
Yan, Zheng | 7ae92e7 | 2012-09-10 15:53:50 +0800 | [diff] [blame] | 434 | if (!sysfs) |
| 435 | return NULL; |
| 436 | |
| 437 | snprintf(path, PATH_MAX, |
| 438 | "%s/bus/event_source/devices/%s/cpumask", sysfs, name); |
| 439 | |
| 440 | if (stat(path, &st) < 0) |
| 441 | return NULL; |
| 442 | |
| 443 | file = fopen(path, "r"); |
| 444 | if (!file) |
| 445 | return NULL; |
| 446 | |
| 447 | cpus = cpu_map__read(file); |
| 448 | fclose(file); |
| 449 | return cpus; |
| 450 | } |
| 451 | |
Sukadev Bhattiprolu | c5de47f | 2015-06-10 00:25:07 -0700 | [diff] [blame] | 452 | struct perf_event_attr * __weak |
Adrian Hunter | dc0a620 | 2014-07-31 09:00:49 +0300 | [diff] [blame] | 453 | perf_pmu__get_default_config(struct perf_pmu *pmu __maybe_unused) |
| 454 | { |
| 455 | return NULL; |
| 456 | } |
| 457 | |
Adrian Hunter | b6b96fb | 2013-07-04 16:20:25 +0300 | [diff] [blame] | 458 | static struct perf_pmu *pmu_lookup(const char *name) |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 459 | { |
| 460 | struct perf_pmu *pmu; |
| 461 | LIST_HEAD(format); |
Zheng Yan | a6146d5 | 2012-06-15 14:31:41 +0800 | [diff] [blame] | 462 | LIST_HEAD(aliases); |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 463 | __u32 type; |
| 464 | |
Adrian Hunter | 5efb1d5 | 2015-07-17 19:33:42 +0300 | [diff] [blame] | 465 | /* No support for intel_bts so disallow it */ |
| 466 | if (!strcmp(name, "intel_bts")) |
Adrian Hunter | 9b5d1c2 | 2015-05-22 14:53:58 +0300 | [diff] [blame] | 467 | return NULL; |
| 468 | |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 469 | /* |
| 470 | * The pmu data we store & need consists of the pmu |
| 471 | * type value and format definitions. Load both right |
| 472 | * now. |
| 473 | */ |
| 474 | if (pmu_format(name, &format)) |
| 475 | return NULL; |
| 476 | |
Jiri Olsa | 3fded96 | 2012-10-10 14:53:16 +0200 | [diff] [blame] | 477 | if (pmu_aliases(name, &aliases)) |
| 478 | return NULL; |
| 479 | |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 480 | if (pmu_type(name, &type)) |
| 481 | return NULL; |
| 482 | |
| 483 | pmu = zalloc(sizeof(*pmu)); |
| 484 | if (!pmu) |
| 485 | return NULL; |
| 486 | |
Yan, Zheng | 7ae92e7 | 2012-09-10 15:53:50 +0800 | [diff] [blame] | 487 | pmu->cpus = pmu_cpumask(name); |
| 488 | |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 489 | INIT_LIST_HEAD(&pmu->format); |
Zheng Yan | a6146d5 | 2012-06-15 14:31:41 +0800 | [diff] [blame] | 490 | INIT_LIST_HEAD(&pmu->aliases); |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 491 | list_splice(&format, &pmu->format); |
Zheng Yan | a6146d5 | 2012-06-15 14:31:41 +0800 | [diff] [blame] | 492 | list_splice(&aliases, &pmu->aliases); |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 493 | pmu->name = strdup(name); |
| 494 | pmu->type = type; |
Robert Richter | 9bc8f9f | 2012-06-14 22:38:37 +0200 | [diff] [blame] | 495 | list_add_tail(&pmu->list, &pmus); |
Adrian Hunter | dc0a620 | 2014-07-31 09:00:49 +0300 | [diff] [blame] | 496 | |
| 497 | pmu->default_config = perf_pmu__get_default_config(pmu); |
| 498 | |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 499 | return pmu; |
| 500 | } |
| 501 | |
Adrian Hunter | b6b96fb | 2013-07-04 16:20:25 +0300 | [diff] [blame] | 502 | static struct perf_pmu *pmu_find(const char *name) |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 503 | { |
| 504 | struct perf_pmu *pmu; |
| 505 | |
| 506 | list_for_each_entry(pmu, &pmus, list) |
| 507 | if (!strcmp(pmu->name, name)) |
| 508 | return pmu; |
| 509 | |
| 510 | return NULL; |
| 511 | } |
| 512 | |
Robert Richter | 50a9667 | 2012-08-16 21:10:24 +0200 | [diff] [blame] | 513 | struct perf_pmu *perf_pmu__scan(struct perf_pmu *pmu) |
| 514 | { |
| 515 | /* |
| 516 | * pmu iterator: If pmu is NULL, we start at the begin, |
| 517 | * otherwise return the next pmu. Returns NULL on end. |
| 518 | */ |
| 519 | if (!pmu) { |
| 520 | pmu_read_sysfs(); |
| 521 | pmu = list_prepare_entry(pmu, &pmus, list); |
| 522 | } |
| 523 | list_for_each_entry_continue(pmu, &pmus, list) |
| 524 | return pmu; |
| 525 | return NULL; |
| 526 | } |
| 527 | |
Adrian Hunter | b6b96fb | 2013-07-04 16:20:25 +0300 | [diff] [blame] | 528 | struct perf_pmu *perf_pmu__find(const char *name) |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 529 | { |
| 530 | struct perf_pmu *pmu; |
| 531 | |
| 532 | /* |
| 533 | * Once PMU is loaded it stays in the list, |
| 534 | * so we keep us from multiple reading/parsing |
| 535 | * the pmu format definitions. |
| 536 | */ |
| 537 | pmu = pmu_find(name); |
| 538 | if (pmu) |
| 539 | return pmu; |
| 540 | |
| 541 | return pmu_lookup(name); |
| 542 | } |
| 543 | |
Arnaldo Carvalho de Melo | 5c6ccc3 | 2013-01-18 16:54:00 -0300 | [diff] [blame] | 544 | static struct perf_pmu_format * |
Adrian Hunter | 09ff607 | 2015-07-17 19:33:49 +0300 | [diff] [blame] | 545 | pmu_find_format(struct list_head *formats, const char *name) |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 546 | { |
Arnaldo Carvalho de Melo | 5c6ccc3 | 2013-01-18 16:54:00 -0300 | [diff] [blame] | 547 | struct perf_pmu_format *format; |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 548 | |
| 549 | list_for_each_entry(format, formats, list) |
| 550 | if (!strcmp(format->name, name)) |
| 551 | return format; |
| 552 | |
| 553 | return NULL; |
| 554 | } |
| 555 | |
Adrian Hunter | 09ff607 | 2015-07-17 19:33:49 +0300 | [diff] [blame] | 556 | __u64 perf_pmu__format_bits(struct list_head *formats, const char *name) |
| 557 | { |
| 558 | struct perf_pmu_format *format = pmu_find_format(formats, name); |
| 559 | __u64 bits = 0; |
| 560 | int fbit; |
| 561 | |
| 562 | if (!format) |
| 563 | return 0; |
| 564 | |
| 565 | for_each_set_bit(fbit, format->bits, PERF_PMU_FORMAT_BITS) |
| 566 | bits |= 1ULL << fbit; |
| 567 | |
| 568 | return bits; |
| 569 | } |
| 570 | |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 571 | /* |
Adrian Hunter | dc0a620 | 2014-07-31 09:00:49 +0300 | [diff] [blame] | 572 | * Sets value based on the format definition (format parameter) |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 573 | * and unformated value (value parameter). |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 574 | */ |
Adrian Hunter | dc0a620 | 2014-07-31 09:00:49 +0300 | [diff] [blame] | 575 | static void pmu_format_value(unsigned long *format, __u64 value, __u64 *v, |
| 576 | bool zero) |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 577 | { |
| 578 | unsigned long fbit, vbit; |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 579 | |
| 580 | for (fbit = 0, vbit = 0; fbit < PERF_PMU_FORMAT_BITS; fbit++) { |
| 581 | |
| 582 | if (!test_bit(fbit, format)) |
| 583 | continue; |
| 584 | |
Adrian Hunter | dc0a620 | 2014-07-31 09:00:49 +0300 | [diff] [blame] | 585 | if (value & (1llu << vbit++)) |
| 586 | *v |= (1llu << fbit); |
| 587 | else if (zero) |
| 588 | *v &= ~(1llu << fbit); |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 589 | } |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 590 | } |
| 591 | |
Adrian Hunter | 0efe6b6 | 2015-07-17 19:33:50 +0300 | [diff] [blame] | 592 | static __u64 pmu_format_max_value(const unsigned long *format) |
| 593 | { |
| 594 | int w; |
| 595 | |
| 596 | w = bitmap_weight(format, PERF_PMU_FORMAT_BITS); |
| 597 | if (!w) |
| 598 | return 0; |
| 599 | if (w < 64) |
| 600 | return (1ULL << w) - 1; |
| 601 | return -1; |
| 602 | } |
| 603 | |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 604 | /* |
Cody P Schafer | 688d4df | 2015-01-07 17:13:50 -0800 | [diff] [blame] | 605 | * Term is a string term, and might be a param-term. Try to look up it's value |
| 606 | * in the remaining terms. |
| 607 | * - We have a term like "base-or-format-term=param-term", |
| 608 | * - We need to find the value supplied for "param-term" (with param-term named |
| 609 | * in a config string) later on in the term list. |
| 610 | */ |
| 611 | static int pmu_resolve_param_term(struct parse_events_term *term, |
| 612 | struct list_head *head_terms, |
| 613 | __u64 *value) |
| 614 | { |
| 615 | struct parse_events_term *t; |
| 616 | |
| 617 | list_for_each_entry(t, head_terms, list) { |
| 618 | if (t->type_val == PARSE_EVENTS__TERM_TYPE_NUM) { |
| 619 | if (!strcmp(t->config, term->config)) { |
| 620 | t->used = true; |
| 621 | *value = t->val.num; |
| 622 | return 0; |
| 623 | } |
| 624 | } |
| 625 | } |
| 626 | |
| 627 | if (verbose) |
| 628 | printf("Required parameter '%s' not specified\n", term->config); |
| 629 | |
| 630 | return -1; |
| 631 | } |
| 632 | |
Jiri Olsa | e64b020 | 2015-04-22 21:10:21 +0200 | [diff] [blame] | 633 | static char *formats_error_string(struct list_head *formats) |
| 634 | { |
| 635 | struct perf_pmu_format *format; |
| 636 | char *err, *str; |
Kan Liang | d457c96 | 2015-08-11 06:30:47 -0400 | [diff] [blame] | 637 | static const char *static_terms = "config,config1,config2,name," |
| 638 | "period,freq,branch_type,time," |
| 639 | "call-graph,stack-size\n"; |
Jiri Olsa | e64b020 | 2015-04-22 21:10:21 +0200 | [diff] [blame] | 640 | unsigned i = 0; |
| 641 | |
| 642 | if (!asprintf(&str, "valid terms:")) |
| 643 | return NULL; |
| 644 | |
| 645 | /* sysfs exported terms */ |
| 646 | list_for_each_entry(format, formats, list) { |
| 647 | char c = i++ ? ',' : ' '; |
| 648 | |
| 649 | err = str; |
| 650 | if (!asprintf(&str, "%s%c%s", err, c, format->name)) |
| 651 | goto fail; |
| 652 | free(err); |
| 653 | } |
| 654 | |
| 655 | /* static terms */ |
| 656 | err = str; |
| 657 | if (!asprintf(&str, "%s,%s", err, static_terms)) |
| 658 | goto fail; |
| 659 | |
| 660 | free(err); |
| 661 | return str; |
| 662 | fail: |
| 663 | free(err); |
| 664 | return NULL; |
| 665 | } |
| 666 | |
Cody P Schafer | 688d4df | 2015-01-07 17:13:50 -0800 | [diff] [blame] | 667 | /* |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 668 | * Setup one of config[12] attr members based on the |
Cody P Schafer | 88aca8d | 2014-01-08 08:43:51 -0800 | [diff] [blame] | 669 | * user input data - term parameter. |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 670 | */ |
| 671 | static int pmu_config_term(struct list_head *formats, |
| 672 | struct perf_event_attr *attr, |
Adrian Hunter | dc0a620 | 2014-07-31 09:00:49 +0300 | [diff] [blame] | 673 | struct parse_events_term *term, |
Cody P Schafer | 688d4df | 2015-01-07 17:13:50 -0800 | [diff] [blame] | 674 | struct list_head *head_terms, |
Jiri Olsa | e64b020 | 2015-04-22 21:10:21 +0200 | [diff] [blame] | 675 | bool zero, struct parse_events_error *err) |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 676 | { |
Arnaldo Carvalho de Melo | 5c6ccc3 | 2013-01-18 16:54:00 -0300 | [diff] [blame] | 677 | struct perf_pmu_format *format; |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 678 | __u64 *vp; |
Adrian Hunter | 0efe6b6 | 2015-07-17 19:33:50 +0300 | [diff] [blame] | 679 | __u64 val, max_val; |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 680 | |
| 681 | /* |
Cody P Schafer | 688d4df | 2015-01-07 17:13:50 -0800 | [diff] [blame] | 682 | * If this is a parameter we've already used for parameterized-eval, |
| 683 | * skip it in normal eval. |
| 684 | */ |
| 685 | if (term->used) |
| 686 | return 0; |
| 687 | |
| 688 | /* |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 689 | * Hardcoded terms should be already in, so nothing |
| 690 | * to be done for them. |
| 691 | */ |
| 692 | if (parse_events__is_hardcoded_term(term)) |
| 693 | return 0; |
| 694 | |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 695 | format = pmu_find_format(formats, term->config); |
Cody P Schafer | 688d4df | 2015-01-07 17:13:50 -0800 | [diff] [blame] | 696 | if (!format) { |
| 697 | if (verbose) |
| 698 | printf("Invalid event/parameter '%s'\n", term->config); |
Jiri Olsa | e64b020 | 2015-04-22 21:10:21 +0200 | [diff] [blame] | 699 | if (err) { |
| 700 | err->idx = term->err_term; |
| 701 | err->str = strdup("unknown term"); |
| 702 | err->help = formats_error_string(formats); |
| 703 | } |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 704 | return -EINVAL; |
Cody P Schafer | 688d4df | 2015-01-07 17:13:50 -0800 | [diff] [blame] | 705 | } |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 706 | |
| 707 | switch (format->value) { |
| 708 | case PERF_PMU_FORMAT_VALUE_CONFIG: |
| 709 | vp = &attr->config; |
| 710 | break; |
| 711 | case PERF_PMU_FORMAT_VALUE_CONFIG1: |
| 712 | vp = &attr->config1; |
| 713 | break; |
| 714 | case PERF_PMU_FORMAT_VALUE_CONFIG2: |
| 715 | vp = &attr->config2; |
| 716 | break; |
| 717 | default: |
| 718 | return -EINVAL; |
| 719 | } |
| 720 | |
Jiri Olsa | 16fa7e8 | 2012-04-25 18:24:57 +0200 | [diff] [blame] | 721 | /* |
Cody P Schafer | 688d4df | 2015-01-07 17:13:50 -0800 | [diff] [blame] | 722 | * Either directly use a numeric term, or try to translate string terms |
| 723 | * using event parameters. |
Jiri Olsa | 16fa7e8 | 2012-04-25 18:24:57 +0200 | [diff] [blame] | 724 | */ |
Cody P Schafer | 688d4df | 2015-01-07 17:13:50 -0800 | [diff] [blame] | 725 | if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) |
| 726 | val = term->val.num; |
| 727 | else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) { |
| 728 | if (strcmp(term->val.str, "?")) { |
Jiri Olsa | e64b020 | 2015-04-22 21:10:21 +0200 | [diff] [blame] | 729 | if (verbose) { |
Cody P Schafer | 688d4df | 2015-01-07 17:13:50 -0800 | [diff] [blame] | 730 | pr_info("Invalid sysfs entry %s=%s\n", |
| 731 | term->config, term->val.str); |
Jiri Olsa | e64b020 | 2015-04-22 21:10:21 +0200 | [diff] [blame] | 732 | } |
| 733 | if (err) { |
| 734 | err->idx = term->err_val; |
| 735 | err->str = strdup("expected numeric value"); |
| 736 | } |
Cody P Schafer | 688d4df | 2015-01-07 17:13:50 -0800 | [diff] [blame] | 737 | return -EINVAL; |
| 738 | } |
| 739 | |
| 740 | if (pmu_resolve_param_term(term, head_terms, &val)) |
| 741 | return -EINVAL; |
| 742 | } else |
| 743 | return -EINVAL; |
| 744 | |
Adrian Hunter | 0efe6b6 | 2015-07-17 19:33:50 +0300 | [diff] [blame] | 745 | max_val = pmu_format_max_value(format->bits); |
| 746 | if (val > max_val) { |
| 747 | if (err) { |
| 748 | err->idx = term->err_val; |
| 749 | if (asprintf(&err->str, |
| 750 | "value too big for format, maximum is %llu", |
| 751 | (unsigned long long)max_val) < 0) |
| 752 | err->str = strdup("value too big for format"); |
| 753 | return -EINVAL; |
| 754 | } |
| 755 | /* |
| 756 | * Assume we don't care if !err, in which case the value will be |
| 757 | * silently truncated. |
| 758 | */ |
| 759 | } |
| 760 | |
Cody P Schafer | 688d4df | 2015-01-07 17:13:50 -0800 | [diff] [blame] | 761 | pmu_format_value(format->bits, val, vp, zero); |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 762 | return 0; |
| 763 | } |
| 764 | |
Jiri Olsa | cff7f95 | 2012-11-10 01:46:50 +0100 | [diff] [blame] | 765 | int perf_pmu__config_terms(struct list_head *formats, |
| 766 | struct perf_event_attr *attr, |
Adrian Hunter | dc0a620 | 2014-07-31 09:00:49 +0300 | [diff] [blame] | 767 | struct list_head *head_terms, |
Jiri Olsa | e64b020 | 2015-04-22 21:10:21 +0200 | [diff] [blame] | 768 | bool zero, struct parse_events_error *err) |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 769 | { |
Arnaldo Carvalho de Melo | 6cee6cd | 2013-01-18 16:29:49 -0300 | [diff] [blame] | 770 | struct parse_events_term *term; |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 771 | |
Cody P Schafer | 688d4df | 2015-01-07 17:13:50 -0800 | [diff] [blame] | 772 | list_for_each_entry(term, head_terms, list) { |
Jiri Olsa | e64b020 | 2015-04-22 21:10:21 +0200 | [diff] [blame] | 773 | if (pmu_config_term(formats, attr, term, head_terms, |
| 774 | zero, err)) |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 775 | return -EINVAL; |
Cody P Schafer | 688d4df | 2015-01-07 17:13:50 -0800 | [diff] [blame] | 776 | } |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 777 | |
| 778 | return 0; |
| 779 | } |
| 780 | |
| 781 | /* |
| 782 | * Configures event's 'attr' parameter based on the: |
| 783 | * 1) users input - specified in terms parameter |
| 784 | * 2) pmu format definitions - specified by pmu parameter |
| 785 | */ |
| 786 | int perf_pmu__config(struct perf_pmu *pmu, struct perf_event_attr *attr, |
Jiri Olsa | e64b020 | 2015-04-22 21:10:21 +0200 | [diff] [blame] | 787 | struct list_head *head_terms, |
| 788 | struct parse_events_error *err) |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 789 | { |
Adrian Hunter | dc0a620 | 2014-07-31 09:00:49 +0300 | [diff] [blame] | 790 | bool zero = !!pmu->default_config; |
| 791 | |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 792 | attr->type = pmu->type; |
Jiri Olsa | e64b020 | 2015-04-22 21:10:21 +0200 | [diff] [blame] | 793 | return perf_pmu__config_terms(&pmu->format, attr, head_terms, |
| 794 | zero, err); |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 795 | } |
| 796 | |
Arnaldo Carvalho de Melo | 5c6ccc3 | 2013-01-18 16:54:00 -0300 | [diff] [blame] | 797 | static struct perf_pmu_alias *pmu_find_alias(struct perf_pmu *pmu, |
| 798 | struct parse_events_term *term) |
Zheng Yan | a6146d5 | 2012-06-15 14:31:41 +0800 | [diff] [blame] | 799 | { |
Arnaldo Carvalho de Melo | 5c6ccc3 | 2013-01-18 16:54:00 -0300 | [diff] [blame] | 800 | struct perf_pmu_alias *alias; |
Zheng Yan | a6146d5 | 2012-06-15 14:31:41 +0800 | [diff] [blame] | 801 | char *name; |
| 802 | |
| 803 | if (parse_events__is_hardcoded_term(term)) |
| 804 | return NULL; |
| 805 | |
| 806 | if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) { |
| 807 | if (term->val.num != 1) |
| 808 | return NULL; |
| 809 | if (pmu_find_format(&pmu->format, term->config)) |
| 810 | return NULL; |
| 811 | name = term->config; |
| 812 | } else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) { |
| 813 | if (strcasecmp(term->config, "event")) |
| 814 | return NULL; |
| 815 | name = term->val.str; |
| 816 | } else { |
| 817 | return NULL; |
| 818 | } |
| 819 | |
| 820 | list_for_each_entry(alias, &pmu->aliases, list) { |
| 821 | if (!strcasecmp(alias->name, name)) |
| 822 | return alias; |
| 823 | } |
| 824 | return NULL; |
| 825 | } |
| 826 | |
Stephane Eranian | 410136f | 2013-11-12 17:58:49 +0100 | [diff] [blame] | 827 | |
Jiri Olsa | 1d9e446 | 2014-11-21 10:31:13 +0100 | [diff] [blame] | 828 | static int check_info_data(struct perf_pmu_alias *alias, |
| 829 | struct perf_pmu_info *info) |
Stephane Eranian | 410136f | 2013-11-12 17:58:49 +0100 | [diff] [blame] | 830 | { |
| 831 | /* |
| 832 | * Only one term in event definition can |
Jiri Olsa | 1d9e446 | 2014-11-21 10:31:13 +0100 | [diff] [blame] | 833 | * define unit, scale and snapshot, fail |
| 834 | * if there's more than one. |
Stephane Eranian | 410136f | 2013-11-12 17:58:49 +0100 | [diff] [blame] | 835 | */ |
Jiri Olsa | 1d9e446 | 2014-11-21 10:31:13 +0100 | [diff] [blame] | 836 | if ((info->unit && alias->unit) || |
| 837 | (info->scale && alias->scale) || |
| 838 | (info->snapshot && alias->snapshot)) |
Stephane Eranian | 410136f | 2013-11-12 17:58:49 +0100 | [diff] [blame] | 839 | return -EINVAL; |
| 840 | |
| 841 | if (alias->unit) |
Jiri Olsa | 1d9e446 | 2014-11-21 10:31:13 +0100 | [diff] [blame] | 842 | info->unit = alias->unit; |
Stephane Eranian | 410136f | 2013-11-12 17:58:49 +0100 | [diff] [blame] | 843 | |
| 844 | if (alias->scale) |
Jiri Olsa | 1d9e446 | 2014-11-21 10:31:13 +0100 | [diff] [blame] | 845 | info->scale = alias->scale; |
| 846 | |
| 847 | if (alias->snapshot) |
| 848 | info->snapshot = alias->snapshot; |
Stephane Eranian | 410136f | 2013-11-12 17:58:49 +0100 | [diff] [blame] | 849 | |
| 850 | return 0; |
| 851 | } |
| 852 | |
Zheng Yan | a6146d5 | 2012-06-15 14:31:41 +0800 | [diff] [blame] | 853 | /* |
| 854 | * Find alias in the terms list and replace it with the terms |
| 855 | * defined for the alias |
| 856 | */ |
Stephane Eranian | 410136f | 2013-11-12 17:58:49 +0100 | [diff] [blame] | 857 | int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms, |
Matt Fleming | 46441bd | 2014-09-24 15:04:06 +0100 | [diff] [blame] | 858 | struct perf_pmu_info *info) |
Zheng Yan | a6146d5 | 2012-06-15 14:31:41 +0800 | [diff] [blame] | 859 | { |
Arnaldo Carvalho de Melo | 6cee6cd | 2013-01-18 16:29:49 -0300 | [diff] [blame] | 860 | struct parse_events_term *term, *h; |
Arnaldo Carvalho de Melo | 5c6ccc3 | 2013-01-18 16:54:00 -0300 | [diff] [blame] | 861 | struct perf_pmu_alias *alias; |
Zheng Yan | a6146d5 | 2012-06-15 14:31:41 +0800 | [diff] [blame] | 862 | int ret; |
| 863 | |
Matt Fleming | 044330c | 2014-11-21 10:31:12 +0100 | [diff] [blame] | 864 | info->per_pkg = false; |
| 865 | |
Stephane Eranian | 8a39889 | 2014-01-17 16:34:05 +0100 | [diff] [blame] | 866 | /* |
| 867 | * Mark unit and scale as not set |
| 868 | * (different from default values, see below) |
| 869 | */ |
Jiri Olsa | 1d9e446 | 2014-11-21 10:31:13 +0100 | [diff] [blame] | 870 | info->unit = NULL; |
| 871 | info->scale = 0.0; |
| 872 | info->snapshot = false; |
Stephane Eranian | 410136f | 2013-11-12 17:58:49 +0100 | [diff] [blame] | 873 | |
Zheng Yan | a6146d5 | 2012-06-15 14:31:41 +0800 | [diff] [blame] | 874 | list_for_each_entry_safe(term, h, head_terms, list) { |
| 875 | alias = pmu_find_alias(pmu, term); |
| 876 | if (!alias) |
| 877 | continue; |
| 878 | ret = pmu_alias_terms(alias, &term->list); |
| 879 | if (ret) |
| 880 | return ret; |
Stephane Eranian | 410136f | 2013-11-12 17:58:49 +0100 | [diff] [blame] | 881 | |
Jiri Olsa | 1d9e446 | 2014-11-21 10:31:13 +0100 | [diff] [blame] | 882 | ret = check_info_data(alias, info); |
Stephane Eranian | 410136f | 2013-11-12 17:58:49 +0100 | [diff] [blame] | 883 | if (ret) |
| 884 | return ret; |
| 885 | |
Matt Fleming | 044330c | 2014-11-21 10:31:12 +0100 | [diff] [blame] | 886 | if (alias->per_pkg) |
| 887 | info->per_pkg = true; |
| 888 | |
Zheng Yan | a6146d5 | 2012-06-15 14:31:41 +0800 | [diff] [blame] | 889 | list_del(&term->list); |
| 890 | free(term); |
| 891 | } |
Stephane Eranian | 8a39889 | 2014-01-17 16:34:05 +0100 | [diff] [blame] | 892 | |
| 893 | /* |
| 894 | * if no unit or scale foundin aliases, then |
| 895 | * set defaults as for evsel |
| 896 | * unit cannot left to NULL |
| 897 | */ |
Matt Fleming | 46441bd | 2014-09-24 15:04:06 +0100 | [diff] [blame] | 898 | if (info->unit == NULL) |
| 899 | info->unit = ""; |
Stephane Eranian | 8a39889 | 2014-01-17 16:34:05 +0100 | [diff] [blame] | 900 | |
Matt Fleming | 46441bd | 2014-09-24 15:04:06 +0100 | [diff] [blame] | 901 | if (info->scale == 0.0) |
| 902 | info->scale = 1.0; |
Stephane Eranian | 8a39889 | 2014-01-17 16:34:05 +0100 | [diff] [blame] | 903 | |
Zheng Yan | a6146d5 | 2012-06-15 14:31:41 +0800 | [diff] [blame] | 904 | return 0; |
| 905 | } |
| 906 | |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 907 | int perf_pmu__new_format(struct list_head *list, char *name, |
| 908 | int config, unsigned long *bits) |
| 909 | { |
Arnaldo Carvalho de Melo | 5c6ccc3 | 2013-01-18 16:54:00 -0300 | [diff] [blame] | 910 | struct perf_pmu_format *format; |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 911 | |
| 912 | format = zalloc(sizeof(*format)); |
| 913 | if (!format) |
| 914 | return -ENOMEM; |
| 915 | |
| 916 | format->name = strdup(name); |
| 917 | format->value = config; |
| 918 | memcpy(format->bits, bits, sizeof(format->bits)); |
| 919 | |
| 920 | list_add_tail(&format->list, list); |
| 921 | return 0; |
| 922 | } |
| 923 | |
| 924 | void perf_pmu__set_format(unsigned long *bits, long from, long to) |
| 925 | { |
| 926 | long b; |
| 927 | |
| 928 | if (!to) |
| 929 | to = from; |
| 930 | |
Sukadev Bhattiprolu | 1526813 | 2013-01-17 09:11:30 -0800 | [diff] [blame] | 931 | memset(bits, 0, BITS_TO_BYTES(PERF_PMU_FORMAT_BITS)); |
Jiri Olsa | cd82a32 | 2012-03-15 20:09:17 +0100 | [diff] [blame] | 932 | for (b = from; b <= to; b++) |
| 933 | set_bit(b, bits); |
| 934 | } |
Andi Kleen | dc098b3 | 2013-04-20 11:02:29 -0700 | [diff] [blame] | 935 | |
Cody P Schafer | aaea361 | 2015-01-07 17:13:51 -0800 | [diff] [blame] | 936 | static int sub_non_neg(int a, int b) |
| 937 | { |
| 938 | if (b > a) |
| 939 | return 0; |
| 940 | return a - b; |
| 941 | } |
| 942 | |
Andi Kleen | dc098b3 | 2013-04-20 11:02:29 -0700 | [diff] [blame] | 943 | static char *format_alias(char *buf, int len, struct perf_pmu *pmu, |
| 944 | struct perf_pmu_alias *alias) |
| 945 | { |
Cody P Schafer | aaea361 | 2015-01-07 17:13:51 -0800 | [diff] [blame] | 946 | struct parse_events_term *term; |
| 947 | int used = snprintf(buf, len, "%s/%s", pmu->name, alias->name); |
| 948 | |
| 949 | list_for_each_entry(term, &alias->terms, list) { |
| 950 | if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) |
| 951 | used += snprintf(buf + used, sub_non_neg(len, used), |
| 952 | ",%s=%s", term->config, |
| 953 | term->val.str); |
| 954 | } |
| 955 | |
| 956 | if (sub_non_neg(len, used) > 0) { |
| 957 | buf[used] = '/'; |
| 958 | used++; |
| 959 | } |
| 960 | if (sub_non_neg(len, used) > 0) { |
| 961 | buf[used] = '\0'; |
| 962 | used++; |
| 963 | } else |
| 964 | buf[len - 1] = '\0'; |
| 965 | |
Andi Kleen | dc098b3 | 2013-04-20 11:02:29 -0700 | [diff] [blame] | 966 | return buf; |
| 967 | } |
| 968 | |
| 969 | static char *format_alias_or(char *buf, int len, struct perf_pmu *pmu, |
| 970 | struct perf_pmu_alias *alias) |
| 971 | { |
| 972 | snprintf(buf, len, "%s OR %s/%s/", alias->name, pmu->name, alias->name); |
| 973 | return buf; |
| 974 | } |
| 975 | |
| 976 | static int cmp_string(const void *a, const void *b) |
| 977 | { |
| 978 | const char * const *as = a; |
| 979 | const char * const *bs = b; |
| 980 | return strcmp(*as, *bs); |
| 981 | } |
| 982 | |
| 983 | void print_pmu_events(const char *event_glob, bool name_only) |
| 984 | { |
| 985 | struct perf_pmu *pmu; |
| 986 | struct perf_pmu_alias *alias; |
| 987 | char buf[1024]; |
| 988 | int printed = 0; |
| 989 | int len, j; |
| 990 | char **aliases; |
| 991 | |
| 992 | pmu = NULL; |
| 993 | len = 0; |
Adrian Hunter | 42634bc | 2014-10-23 13:45:10 +0300 | [diff] [blame] | 994 | while ((pmu = perf_pmu__scan(pmu)) != NULL) { |
Andi Kleen | dc098b3 | 2013-04-20 11:02:29 -0700 | [diff] [blame] | 995 | list_for_each_entry(alias, &pmu->aliases, list) |
| 996 | len++; |
Adrian Hunter | 42634bc | 2014-10-23 13:45:10 +0300 | [diff] [blame] | 997 | if (pmu->selectable) |
| 998 | len++; |
| 999 | } |
Arnaldo Carvalho de Melo | 7e4772d | 2014-10-24 10:25:09 -0300 | [diff] [blame] | 1000 | aliases = zalloc(sizeof(char *) * len); |
Andi Kleen | dc098b3 | 2013-04-20 11:02:29 -0700 | [diff] [blame] | 1001 | if (!aliases) |
Arnaldo Carvalho de Melo | 7e4772d | 2014-10-24 10:25:09 -0300 | [diff] [blame] | 1002 | goto out_enomem; |
Andi Kleen | dc098b3 | 2013-04-20 11:02:29 -0700 | [diff] [blame] | 1003 | pmu = NULL; |
| 1004 | j = 0; |
Adrian Hunter | 42634bc | 2014-10-23 13:45:10 +0300 | [diff] [blame] | 1005 | while ((pmu = perf_pmu__scan(pmu)) != NULL) { |
Andi Kleen | dc098b3 | 2013-04-20 11:02:29 -0700 | [diff] [blame] | 1006 | list_for_each_entry(alias, &pmu->aliases, list) { |
| 1007 | char *name = format_alias(buf, sizeof(buf), pmu, alias); |
| 1008 | bool is_cpu = !strcmp(pmu->name, "cpu"); |
| 1009 | |
| 1010 | if (event_glob != NULL && |
| 1011 | !(strglobmatch(name, event_glob) || |
| 1012 | (!is_cpu && strglobmatch(alias->name, |
| 1013 | event_glob)))) |
| 1014 | continue; |
Arnaldo Carvalho de Melo | 7e4772d | 2014-10-24 10:25:09 -0300 | [diff] [blame] | 1015 | |
Andi Kleen | dc098b3 | 2013-04-20 11:02:29 -0700 | [diff] [blame] | 1016 | if (is_cpu && !name_only) |
Arnaldo Carvalho de Melo | 7e4772d | 2014-10-24 10:25:09 -0300 | [diff] [blame] | 1017 | name = format_alias_or(buf, sizeof(buf), pmu, alias); |
| 1018 | |
| 1019 | aliases[j] = strdup(name); |
| 1020 | if (aliases[j] == NULL) |
| 1021 | goto out_enomem; |
Andi Kleen | dc098b3 | 2013-04-20 11:02:29 -0700 | [diff] [blame] | 1022 | j++; |
| 1023 | } |
Adrian Hunter | 42634bc | 2014-10-23 13:45:10 +0300 | [diff] [blame] | 1024 | if (pmu->selectable) { |
Arnaldo Carvalho de Melo | 7e4772d | 2014-10-24 10:25:09 -0300 | [diff] [blame] | 1025 | char *s; |
| 1026 | if (asprintf(&s, "%s//", pmu->name) < 0) |
| 1027 | goto out_enomem; |
| 1028 | aliases[j] = s; |
Adrian Hunter | 42634bc | 2014-10-23 13:45:10 +0300 | [diff] [blame] | 1029 | j++; |
| 1030 | } |
| 1031 | } |
Andi Kleen | dc098b3 | 2013-04-20 11:02:29 -0700 | [diff] [blame] | 1032 | len = j; |
| 1033 | qsort(aliases, len, sizeof(char *), cmp_string); |
| 1034 | for (j = 0; j < len; j++) { |
| 1035 | if (name_only) { |
| 1036 | printf("%s ", aliases[j]); |
| 1037 | continue; |
| 1038 | } |
| 1039 | printf(" %-50s [Kernel PMU event]\n", aliases[j]); |
Andi Kleen | dc098b3 | 2013-04-20 11:02:29 -0700 | [diff] [blame] | 1040 | printed++; |
| 1041 | } |
| 1042 | if (printed) |
| 1043 | printf("\n"); |
Arnaldo Carvalho de Melo | 7e4772d | 2014-10-24 10:25:09 -0300 | [diff] [blame] | 1044 | out_free: |
| 1045 | for (j = 0; j < len; j++) |
| 1046 | zfree(&aliases[j]); |
| 1047 | zfree(&aliases); |
| 1048 | return; |
| 1049 | |
| 1050 | out_enomem: |
| 1051 | printf("FATAL: not enough memory to print PMU events\n"); |
| 1052 | if (aliases) |
| 1053 | goto out_free; |
Andi Kleen | dc098b3 | 2013-04-20 11:02:29 -0700 | [diff] [blame] | 1054 | } |
Andi Kleen | 4cabc3d | 2013-08-21 16:47:26 -0700 | [diff] [blame] | 1055 | |
| 1056 | bool pmu_have_event(const char *pname, const char *name) |
| 1057 | { |
| 1058 | struct perf_pmu *pmu; |
| 1059 | struct perf_pmu_alias *alias; |
| 1060 | |
| 1061 | pmu = NULL; |
| 1062 | while ((pmu = perf_pmu__scan(pmu)) != NULL) { |
| 1063 | if (strcmp(pname, pmu->name)) |
| 1064 | continue; |
| 1065 | list_for_each_entry(alias, &pmu->aliases, list) |
| 1066 | if (!strcmp(alias->name, name)) |
| 1067 | return true; |
| 1068 | } |
| 1069 | return false; |
| 1070 | } |
Adrian Hunter | 7d4bdab | 2014-07-31 09:00:50 +0300 | [diff] [blame] | 1071 | |
| 1072 | static FILE *perf_pmu__open_file(struct perf_pmu *pmu, const char *name) |
| 1073 | { |
| 1074 | struct stat st; |
| 1075 | char path[PATH_MAX]; |
| 1076 | const char *sysfs; |
| 1077 | |
| 1078 | sysfs = sysfs__mountpoint(); |
| 1079 | if (!sysfs) |
| 1080 | return NULL; |
| 1081 | |
| 1082 | snprintf(path, PATH_MAX, |
| 1083 | "%s" EVENT_SOURCE_DEVICE_PATH "%s/%s", sysfs, pmu->name, name); |
| 1084 | |
| 1085 | if (stat(path, &st) < 0) |
| 1086 | return NULL; |
| 1087 | |
| 1088 | return fopen(path, "r"); |
| 1089 | } |
| 1090 | |
| 1091 | int perf_pmu__scan_file(struct perf_pmu *pmu, const char *name, const char *fmt, |
| 1092 | ...) |
| 1093 | { |
| 1094 | va_list args; |
| 1095 | FILE *file; |
| 1096 | int ret = EOF; |
| 1097 | |
| 1098 | va_start(args, fmt); |
| 1099 | file = perf_pmu__open_file(pmu, name); |
| 1100 | if (file) { |
| 1101 | ret = vfscanf(file, fmt, args); |
| 1102 | fclose(file); |
| 1103 | } |
| 1104 | va_end(args); |
| 1105 | return ret; |
| 1106 | } |