blob: 00a7dcb2f55cb0d7734e7eb331384d00aa42809c [file] [log] [blame]
Jiri Olsacd82a322012-03-15 20:09:17 +01001#include <linux/list.h>
2#include <sys/types.h>
Jiri Olsacd82a322012-03-15 20:09:17 +01003#include <unistd.h>
4#include <stdio.h>
5#include <dirent.h>
Borislav Petkovcd0cfad2013-12-09 17:14:24 +01006#include <api/fs/fs.h>
Stephane Eranian410136f2013-11-12 17:58:49 +01007#include <locale.h>
Jiri Olsacd82a322012-03-15 20:09:17 +01008#include "util.h"
9#include "pmu.h"
10#include "parse-events.h"
Yan, Zheng7ae92e72012-09-10 15:53:50 +080011#include "cpumap.h"
Jiri Olsacd82a322012-03-15 20:09:17 +010012
Stephane Eranian410136f2013-11-12 17:58:49 +010013#define UNIT_MAX_LEN 31 /* max length for event unit name */
14
Arnaldo Carvalho de Meloab1bf6532013-01-18 17:05:09 -030015struct perf_pmu_alias {
16 char *name;
17 struct list_head terms;
18 struct list_head list;
Stephane Eranian410136f2013-11-12 17:58:49 +010019 char unit[UNIT_MAX_LEN+1];
20 double scale;
Arnaldo Carvalho de Meloab1bf6532013-01-18 17:05:09 -030021};
22
23struct perf_pmu_format {
24 char *name;
25 int value;
26 DECLARE_BITMAP(bits, PERF_PMU_FORMAT_BITS);
27 struct list_head list;
28};
29
Robert Richter50a96672012-08-16 21:10:24 +020030#define EVENT_SOURCE_DEVICE_PATH "/bus/event_source/devices/"
31
Jiri Olsacd82a322012-03-15 20:09:17 +010032int perf_pmu_parse(struct list_head *list, char *name);
33extern FILE *perf_pmu_in;
34
35static LIST_HEAD(pmus);
36
37/*
38 * Parse & process all the sysfs attributes located under
39 * the directory specified in 'dir' parameter.
40 */
Jiri Olsacff7f952012-11-10 01:46:50 +010041int perf_pmu__format_parse(char *dir, struct list_head *head)
Jiri Olsacd82a322012-03-15 20:09:17 +010042{
43 struct dirent *evt_ent;
44 DIR *format_dir;
45 int ret = 0;
46
47 format_dir = opendir(dir);
48 if (!format_dir)
49 return -EINVAL;
50
51 while (!ret && (evt_ent = readdir(format_dir))) {
52 char path[PATH_MAX];
53 char *name = evt_ent->d_name;
54 FILE *file;
55
56 if (!strcmp(name, ".") || !strcmp(name, ".."))
57 continue;
58
59 snprintf(path, PATH_MAX, "%s/%s", dir, name);
60
61 ret = -EINVAL;
62 file = fopen(path, "r");
63 if (!file)
64 break;
65
66 perf_pmu_in = file;
67 ret = perf_pmu_parse(head, name);
68 fclose(file);
69 }
70
71 closedir(format_dir);
72 return ret;
73}
74
75/*
76 * Reading/parsing the default pmu format definition, which should be
77 * located at:
78 * /sys/bus/event_source/devices/<dev>/format as sysfs group attributes.
79 */
Adrian Hunterb6b96fb2013-07-04 16:20:25 +030080static int pmu_format(const char *name, struct list_head *format)
Jiri Olsacd82a322012-03-15 20:09:17 +010081{
82 struct stat st;
83 char path[PATH_MAX];
Arnaldo Carvalho de Melocf38fad2013-11-05 14:48:50 -030084 const char *sysfs = sysfs__mountpoint();
Jiri Olsacd82a322012-03-15 20:09:17 +010085
Jiri Olsacd82a322012-03-15 20:09:17 +010086 if (!sysfs)
87 return -1;
88
89 snprintf(path, PATH_MAX,
Robert Richter50a96672012-08-16 21:10:24 +020090 "%s" EVENT_SOURCE_DEVICE_PATH "%s/format", sysfs, name);
Jiri Olsacd82a322012-03-15 20:09:17 +010091
92 if (stat(path, &st) < 0)
Robert Richter9bc8f9f2012-06-14 22:38:37 +020093 return 0; /* no error if format does not exist */
Jiri Olsacd82a322012-03-15 20:09:17 +010094
Jiri Olsacff7f952012-11-10 01:46:50 +010095 if (perf_pmu__format_parse(path, format))
Jiri Olsacd82a322012-03-15 20:09:17 +010096 return -1;
97
98 return 0;
99}
100
Stephane Eranian410136f2013-11-12 17:58:49 +0100101static int perf_pmu__parse_scale(struct perf_pmu_alias *alias, char *dir, char *name)
102{
103 struct stat st;
104 ssize_t sret;
105 char scale[128];
106 int fd, ret = -1;
107 char path[PATH_MAX];
Stephane Eranian8a398892014-01-17 16:34:05 +0100108 const char *lc;
Stephane Eranian410136f2013-11-12 17:58:49 +0100109
110 snprintf(path, PATH_MAX, "%s/%s.scale", dir, name);
111
112 fd = open(path, O_RDONLY);
113 if (fd == -1)
114 return -1;
115
116 if (fstat(fd, &st) < 0)
117 goto error;
118
119 sret = read(fd, scale, sizeof(scale)-1);
120 if (sret < 0)
121 goto error;
122
123 scale[sret] = '\0';
124 /*
125 * save current locale
126 */
127 lc = setlocale(LC_NUMERIC, NULL);
128
129 /*
130 * force to C locale to ensure kernel
131 * scale string is converted correctly.
132 * kernel uses default C locale.
133 */
134 setlocale(LC_NUMERIC, "C");
135
136 alias->scale = strtod(scale, NULL);
137
138 /* restore locale */
139 setlocale(LC_NUMERIC, lc);
140
141 ret = 0;
142error:
143 close(fd);
144 return ret;
145}
146
147static int perf_pmu__parse_unit(struct perf_pmu_alias *alias, char *dir, char *name)
148{
149 char path[PATH_MAX];
150 ssize_t sret;
151 int fd;
152
153 snprintf(path, PATH_MAX, "%s/%s.unit", dir, name);
154
155 fd = open(path, O_RDONLY);
156 if (fd == -1)
157 return -1;
158
159 sret = read(fd, alias->unit, UNIT_MAX_LEN);
160 if (sret < 0)
161 goto error;
162
163 close(fd);
164
165 alias->unit[sret] = '\0';
166
167 return 0;
168error:
169 close(fd);
170 alias->unit[0] = '\0';
171 return -1;
172}
173
174static int perf_pmu__new_alias(struct list_head *list, char *dir, char *name, FILE *file)
Zheng Yana6146d52012-06-15 14:31:41 +0800175{
Arnaldo Carvalho de Melo5c6ccc32013-01-18 16:54:00 -0300176 struct perf_pmu_alias *alias;
Zheng Yana6146d52012-06-15 14:31:41 +0800177 char buf[256];
178 int ret;
179
180 ret = fread(buf, 1, sizeof(buf), file);
181 if (ret == 0)
182 return -EINVAL;
183 buf[ret] = 0;
184
185 alias = malloc(sizeof(*alias));
186 if (!alias)
187 return -ENOMEM;
188
189 INIT_LIST_HEAD(&alias->terms);
Stephane Eranian410136f2013-11-12 17:58:49 +0100190 alias->scale = 1.0;
191 alias->unit[0] = '\0';
192
Zheng Yana6146d52012-06-15 14:31:41 +0800193 ret = parse_events_terms(&alias->terms, buf);
194 if (ret) {
195 free(alias);
196 return ret;
197 }
198
199 alias->name = strdup(name);
Stephane Eranian410136f2013-11-12 17:58:49 +0100200 /*
201 * load unit name and scale if available
202 */
203 perf_pmu__parse_unit(alias, dir, name);
204 perf_pmu__parse_scale(alias, dir, name);
205
Zheng Yana6146d52012-06-15 14:31:41 +0800206 list_add_tail(&alias->list, list);
Stephane Eranian410136f2013-11-12 17:58:49 +0100207
Zheng Yana6146d52012-06-15 14:31:41 +0800208 return 0;
209}
210
211/*
212 * Process all the sysfs attributes located under the directory
213 * specified in 'dir' parameter.
214 */
215static int pmu_aliases_parse(char *dir, struct list_head *head)
216{
217 struct dirent *evt_ent;
218 DIR *event_dir;
Stephane Eranian410136f2013-11-12 17:58:49 +0100219 size_t len;
Zheng Yana6146d52012-06-15 14:31:41 +0800220 int ret = 0;
221
222 event_dir = opendir(dir);
223 if (!event_dir)
224 return -EINVAL;
225
226 while (!ret && (evt_ent = readdir(event_dir))) {
227 char path[PATH_MAX];
228 char *name = evt_ent->d_name;
229 FILE *file;
230
231 if (!strcmp(name, ".") || !strcmp(name, ".."))
232 continue;
233
Stephane Eranian410136f2013-11-12 17:58:49 +0100234 /*
235 * skip .unit and .scale info files
236 * parsed in perf_pmu__new_alias()
237 */
238 len = strlen(name);
239 if (len > 5 && !strcmp(name + len - 5, ".unit"))
240 continue;
241 if (len > 6 && !strcmp(name + len - 6, ".scale"))
242 continue;
243
Zheng Yana6146d52012-06-15 14:31:41 +0800244 snprintf(path, PATH_MAX, "%s/%s", dir, name);
245
246 ret = -EINVAL;
247 file = fopen(path, "r");
248 if (!file)
249 break;
Stephane Eranian410136f2013-11-12 17:58:49 +0100250
251 ret = perf_pmu__new_alias(head, dir, name, file);
Zheng Yana6146d52012-06-15 14:31:41 +0800252 fclose(file);
253 }
254
255 closedir(event_dir);
256 return ret;
257}
258
259/*
260 * Reading the pmu event aliases definition, which should be located at:
261 * /sys/bus/event_source/devices/<dev>/events as sysfs group attributes.
262 */
Adrian Hunterb6b96fb2013-07-04 16:20:25 +0300263static int pmu_aliases(const char *name, struct list_head *head)
Zheng Yana6146d52012-06-15 14:31:41 +0800264{
265 struct stat st;
266 char path[PATH_MAX];
Arnaldo Carvalho de Melocf38fad2013-11-05 14:48:50 -0300267 const char *sysfs = sysfs__mountpoint();
Zheng Yana6146d52012-06-15 14:31:41 +0800268
Zheng Yana6146d52012-06-15 14:31:41 +0800269 if (!sysfs)
270 return -1;
271
272 snprintf(path, PATH_MAX,
273 "%s/bus/event_source/devices/%s/events", sysfs, name);
274
275 if (stat(path, &st) < 0)
Jiri Olsa3fded962012-10-10 14:53:16 +0200276 return 0; /* no error if 'events' does not exist */
Zheng Yana6146d52012-06-15 14:31:41 +0800277
278 if (pmu_aliases_parse(path, head))
279 return -1;
280
281 return 0;
282}
283
Arnaldo Carvalho de Melo5c6ccc32013-01-18 16:54:00 -0300284static int pmu_alias_terms(struct perf_pmu_alias *alias,
Zheng Yana6146d52012-06-15 14:31:41 +0800285 struct list_head *terms)
286{
Arnaldo Carvalho de Melo6cee6cd2013-01-18 16:29:49 -0300287 struct parse_events_term *term, *clone;
Zheng Yana6146d52012-06-15 14:31:41 +0800288 LIST_HEAD(list);
289 int ret;
290
291 list_for_each_entry(term, &alias->terms, list) {
Arnaldo Carvalho de Melo6cee6cd2013-01-18 16:29:49 -0300292 ret = parse_events_term__clone(&clone, term);
Zheng Yana6146d52012-06-15 14:31:41 +0800293 if (ret) {
294 parse_events__free_terms(&list);
295 return ret;
296 }
297 list_add_tail(&clone->list, &list);
298 }
299 list_splice(&list, terms);
300 return 0;
301}
302
Jiri Olsacd82a322012-03-15 20:09:17 +0100303/*
304 * Reading/parsing the default pmu type value, which should be
305 * located at:
306 * /sys/bus/event_source/devices/<dev>/type as sysfs attribute.
307 */
Adrian Hunterb6b96fb2013-07-04 16:20:25 +0300308static int pmu_type(const char *name, __u32 *type)
Jiri Olsacd82a322012-03-15 20:09:17 +0100309{
310 struct stat st;
311 char path[PATH_MAX];
Jiri Olsacd82a322012-03-15 20:09:17 +0100312 FILE *file;
313 int ret = 0;
Arnaldo Carvalho de Melocf38fad2013-11-05 14:48:50 -0300314 const char *sysfs = sysfs__mountpoint();
Jiri Olsacd82a322012-03-15 20:09:17 +0100315
Jiri Olsacd82a322012-03-15 20:09:17 +0100316 if (!sysfs)
317 return -1;
318
319 snprintf(path, PATH_MAX,
Robert Richter50a96672012-08-16 21:10:24 +0200320 "%s" EVENT_SOURCE_DEVICE_PATH "%s/type", sysfs, name);
Jiri Olsacd82a322012-03-15 20:09:17 +0100321
322 if (stat(path, &st) < 0)
323 return -1;
324
325 file = fopen(path, "r");
326 if (!file)
327 return -EINVAL;
328
329 if (1 != fscanf(file, "%u", type))
330 ret = -1;
331
332 fclose(file);
333 return ret;
334}
335
Robert Richter50a96672012-08-16 21:10:24 +0200336/* Add all pmus in sysfs to pmu list: */
337static void pmu_read_sysfs(void)
338{
339 char path[PATH_MAX];
Robert Richter50a96672012-08-16 21:10:24 +0200340 DIR *dir;
341 struct dirent *dent;
Arnaldo Carvalho de Melocf38fad2013-11-05 14:48:50 -0300342 const char *sysfs = sysfs__mountpoint();
Robert Richter50a96672012-08-16 21:10:24 +0200343
Robert Richter50a96672012-08-16 21:10:24 +0200344 if (!sysfs)
345 return;
346
347 snprintf(path, PATH_MAX,
348 "%s" EVENT_SOURCE_DEVICE_PATH, sysfs);
349
350 dir = opendir(path);
351 if (!dir)
352 return;
353
354 while ((dent = readdir(dir))) {
355 if (!strcmp(dent->d_name, ".") || !strcmp(dent->d_name, ".."))
356 continue;
357 /* add to static LIST_HEAD(pmus): */
358 perf_pmu__find(dent->d_name);
359 }
360
361 closedir(dir);
362}
363
Adrian Hunterb6b96fb2013-07-04 16:20:25 +0300364static struct cpu_map *pmu_cpumask(const char *name)
Yan, Zheng7ae92e72012-09-10 15:53:50 +0800365{
366 struct stat st;
367 char path[PATH_MAX];
Yan, Zheng7ae92e72012-09-10 15:53:50 +0800368 FILE *file;
369 struct cpu_map *cpus;
Arnaldo Carvalho de Melocf38fad2013-11-05 14:48:50 -0300370 const char *sysfs = sysfs__mountpoint();
Yan, Zheng7ae92e72012-09-10 15:53:50 +0800371
Yan, Zheng7ae92e72012-09-10 15:53:50 +0800372 if (!sysfs)
373 return NULL;
374
375 snprintf(path, PATH_MAX,
376 "%s/bus/event_source/devices/%s/cpumask", sysfs, name);
377
378 if (stat(path, &st) < 0)
379 return NULL;
380
381 file = fopen(path, "r");
382 if (!file)
383 return NULL;
384
385 cpus = cpu_map__read(file);
386 fclose(file);
387 return cpus;
388}
389
Adrian Hunterb6b96fb2013-07-04 16:20:25 +0300390static struct perf_pmu *pmu_lookup(const char *name)
Jiri Olsacd82a322012-03-15 20:09:17 +0100391{
392 struct perf_pmu *pmu;
393 LIST_HEAD(format);
Zheng Yana6146d52012-06-15 14:31:41 +0800394 LIST_HEAD(aliases);
Jiri Olsacd82a322012-03-15 20:09:17 +0100395 __u32 type;
396
397 /*
398 * The pmu data we store & need consists of the pmu
399 * type value and format definitions. Load both right
400 * now.
401 */
402 if (pmu_format(name, &format))
403 return NULL;
404
Jiri Olsa3fded962012-10-10 14:53:16 +0200405 if (pmu_aliases(name, &aliases))
406 return NULL;
407
Jiri Olsacd82a322012-03-15 20:09:17 +0100408 if (pmu_type(name, &type))
409 return NULL;
410
411 pmu = zalloc(sizeof(*pmu));
412 if (!pmu)
413 return NULL;
414
Yan, Zheng7ae92e72012-09-10 15:53:50 +0800415 pmu->cpus = pmu_cpumask(name);
416
Jiri Olsacd82a322012-03-15 20:09:17 +0100417 INIT_LIST_HEAD(&pmu->format);
Zheng Yana6146d52012-06-15 14:31:41 +0800418 INIT_LIST_HEAD(&pmu->aliases);
Jiri Olsacd82a322012-03-15 20:09:17 +0100419 list_splice(&format, &pmu->format);
Zheng Yana6146d52012-06-15 14:31:41 +0800420 list_splice(&aliases, &pmu->aliases);
Jiri Olsacd82a322012-03-15 20:09:17 +0100421 pmu->name = strdup(name);
422 pmu->type = type;
Robert Richter9bc8f9f2012-06-14 22:38:37 +0200423 list_add_tail(&pmu->list, &pmus);
Jiri Olsacd82a322012-03-15 20:09:17 +0100424 return pmu;
425}
426
Adrian Hunterb6b96fb2013-07-04 16:20:25 +0300427static struct perf_pmu *pmu_find(const char *name)
Jiri Olsacd82a322012-03-15 20:09:17 +0100428{
429 struct perf_pmu *pmu;
430
431 list_for_each_entry(pmu, &pmus, list)
432 if (!strcmp(pmu->name, name))
433 return pmu;
434
435 return NULL;
436}
437
Robert Richter50a96672012-08-16 21:10:24 +0200438struct perf_pmu *perf_pmu__scan(struct perf_pmu *pmu)
439{
440 /*
441 * pmu iterator: If pmu is NULL, we start at the begin,
442 * otherwise return the next pmu. Returns NULL on end.
443 */
444 if (!pmu) {
445 pmu_read_sysfs();
446 pmu = list_prepare_entry(pmu, &pmus, list);
447 }
448 list_for_each_entry_continue(pmu, &pmus, list)
449 return pmu;
450 return NULL;
451}
452
Adrian Hunterb6b96fb2013-07-04 16:20:25 +0300453struct perf_pmu *perf_pmu__find(const char *name)
Jiri Olsacd82a322012-03-15 20:09:17 +0100454{
455 struct perf_pmu *pmu;
456
457 /*
458 * Once PMU is loaded it stays in the list,
459 * so we keep us from multiple reading/parsing
460 * the pmu format definitions.
461 */
462 pmu = pmu_find(name);
463 if (pmu)
464 return pmu;
465
466 return pmu_lookup(name);
467}
468
Arnaldo Carvalho de Melo5c6ccc32013-01-18 16:54:00 -0300469static struct perf_pmu_format *
Jiri Olsacd82a322012-03-15 20:09:17 +0100470pmu_find_format(struct list_head *formats, char *name)
471{
Arnaldo Carvalho de Melo5c6ccc32013-01-18 16:54:00 -0300472 struct perf_pmu_format *format;
Jiri Olsacd82a322012-03-15 20:09:17 +0100473
474 list_for_each_entry(format, formats, list)
475 if (!strcmp(format->name, name))
476 return format;
477
478 return NULL;
479}
480
481/*
482 * Returns value based on the format definition (format parameter)
483 * and unformated value (value parameter).
484 *
485 * TODO maybe optimize a little ;)
486 */
487static __u64 pmu_format_value(unsigned long *format, __u64 value)
488{
489 unsigned long fbit, vbit;
490 __u64 v = 0;
491
492 for (fbit = 0, vbit = 0; fbit < PERF_PMU_FORMAT_BITS; fbit++) {
493
494 if (!test_bit(fbit, format))
495 continue;
496
497 if (!(value & (1llu << vbit++)))
498 continue;
499
500 v |= (1llu << fbit);
501 }
502
503 return v;
504}
505
506/*
507 * Setup one of config[12] attr members based on the
Cody P Schafer88aca8d2014-01-08 08:43:51 -0800508 * user input data - term parameter.
Jiri Olsacd82a322012-03-15 20:09:17 +0100509 */
510static int pmu_config_term(struct list_head *formats,
511 struct perf_event_attr *attr,
Arnaldo Carvalho de Melo6cee6cd2013-01-18 16:29:49 -0300512 struct parse_events_term *term)
Jiri Olsacd82a322012-03-15 20:09:17 +0100513{
Arnaldo Carvalho de Melo5c6ccc32013-01-18 16:54:00 -0300514 struct perf_pmu_format *format;
Jiri Olsacd82a322012-03-15 20:09:17 +0100515 __u64 *vp;
516
517 /*
518 * Support only for hardcoded and numnerial terms.
519 * Hardcoded terms should be already in, so nothing
520 * to be done for them.
521 */
522 if (parse_events__is_hardcoded_term(term))
523 return 0;
524
Jiri Olsa16fa7e82012-04-25 18:24:57 +0200525 if (term->type_val != PARSE_EVENTS__TERM_TYPE_NUM)
Jiri Olsacd82a322012-03-15 20:09:17 +0100526 return -EINVAL;
527
528 format = pmu_find_format(formats, term->config);
529 if (!format)
530 return -EINVAL;
531
532 switch (format->value) {
533 case PERF_PMU_FORMAT_VALUE_CONFIG:
534 vp = &attr->config;
535 break;
536 case PERF_PMU_FORMAT_VALUE_CONFIG1:
537 vp = &attr->config1;
538 break;
539 case PERF_PMU_FORMAT_VALUE_CONFIG2:
540 vp = &attr->config2;
541 break;
542 default:
543 return -EINVAL;
544 }
545
Jiri Olsa16fa7e82012-04-25 18:24:57 +0200546 /*
547 * XXX If we ever decide to go with string values for
548 * non-hardcoded terms, here's the place to translate
549 * them into value.
550 */
Jiri Olsacd82a322012-03-15 20:09:17 +0100551 *vp |= pmu_format_value(format->bits, term->val.num);
552 return 0;
553}
554
Jiri Olsacff7f952012-11-10 01:46:50 +0100555int perf_pmu__config_terms(struct list_head *formats,
556 struct perf_event_attr *attr,
557 struct list_head *head_terms)
Jiri Olsacd82a322012-03-15 20:09:17 +0100558{
Arnaldo Carvalho de Melo6cee6cd2013-01-18 16:29:49 -0300559 struct parse_events_term *term;
Jiri Olsacd82a322012-03-15 20:09:17 +0100560
Jiri Olsa6b5fc392012-05-21 09:12:53 +0200561 list_for_each_entry(term, head_terms, list)
Jiri Olsacd82a322012-03-15 20:09:17 +0100562 if (pmu_config_term(formats, attr, term))
563 return -EINVAL;
564
565 return 0;
566}
567
568/*
569 * Configures event's 'attr' parameter based on the:
570 * 1) users input - specified in terms parameter
571 * 2) pmu format definitions - specified by pmu parameter
572 */
573int perf_pmu__config(struct perf_pmu *pmu, struct perf_event_attr *attr,
574 struct list_head *head_terms)
575{
576 attr->type = pmu->type;
Jiri Olsacff7f952012-11-10 01:46:50 +0100577 return perf_pmu__config_terms(&pmu->format, attr, head_terms);
Jiri Olsacd82a322012-03-15 20:09:17 +0100578}
579
Arnaldo Carvalho de Melo5c6ccc32013-01-18 16:54:00 -0300580static struct perf_pmu_alias *pmu_find_alias(struct perf_pmu *pmu,
581 struct parse_events_term *term)
Zheng Yana6146d52012-06-15 14:31:41 +0800582{
Arnaldo Carvalho de Melo5c6ccc32013-01-18 16:54:00 -0300583 struct perf_pmu_alias *alias;
Zheng Yana6146d52012-06-15 14:31:41 +0800584 char *name;
585
586 if (parse_events__is_hardcoded_term(term))
587 return NULL;
588
589 if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) {
590 if (term->val.num != 1)
591 return NULL;
592 if (pmu_find_format(&pmu->format, term->config))
593 return NULL;
594 name = term->config;
595 } else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) {
596 if (strcasecmp(term->config, "event"))
597 return NULL;
598 name = term->val.str;
599 } else {
600 return NULL;
601 }
602
603 list_for_each_entry(alias, &pmu->aliases, list) {
604 if (!strcasecmp(alias->name, name))
605 return alias;
606 }
607 return NULL;
608}
609
Stephane Eranian410136f2013-11-12 17:58:49 +0100610
611static int check_unit_scale(struct perf_pmu_alias *alias,
Stephane Eranian8a398892014-01-17 16:34:05 +0100612 const char **unit, double *scale)
Stephane Eranian410136f2013-11-12 17:58:49 +0100613{
614 /*
615 * Only one term in event definition can
616 * define unit and scale, fail if there's
617 * more than one.
618 */
619 if ((*unit && alias->unit) ||
620 (*scale && alias->scale))
621 return -EINVAL;
622
623 if (alias->unit)
624 *unit = alias->unit;
625
626 if (alias->scale)
627 *scale = alias->scale;
628
629 return 0;
630}
631
Zheng Yana6146d52012-06-15 14:31:41 +0800632/*
633 * Find alias in the terms list and replace it with the terms
634 * defined for the alias
635 */
Stephane Eranian410136f2013-11-12 17:58:49 +0100636int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms,
Stephane Eranian8a398892014-01-17 16:34:05 +0100637 const char **unit, double *scale)
Zheng Yana6146d52012-06-15 14:31:41 +0800638{
Arnaldo Carvalho de Melo6cee6cd2013-01-18 16:29:49 -0300639 struct parse_events_term *term, *h;
Arnaldo Carvalho de Melo5c6ccc32013-01-18 16:54:00 -0300640 struct perf_pmu_alias *alias;
Zheng Yana6146d52012-06-15 14:31:41 +0800641 int ret;
642
Stephane Eranian8a398892014-01-17 16:34:05 +0100643 /*
644 * Mark unit and scale as not set
645 * (different from default values, see below)
646 */
Stephane Eranian410136f2013-11-12 17:58:49 +0100647 *unit = NULL;
Stephane Eranian8a398892014-01-17 16:34:05 +0100648 *scale = 0.0;
Stephane Eranian410136f2013-11-12 17:58:49 +0100649
Zheng Yana6146d52012-06-15 14:31:41 +0800650 list_for_each_entry_safe(term, h, head_terms, list) {
651 alias = pmu_find_alias(pmu, term);
652 if (!alias)
653 continue;
654 ret = pmu_alias_terms(alias, &term->list);
655 if (ret)
656 return ret;
Stephane Eranian410136f2013-11-12 17:58:49 +0100657
658 ret = check_unit_scale(alias, unit, scale);
659 if (ret)
660 return ret;
661
Zheng Yana6146d52012-06-15 14:31:41 +0800662 list_del(&term->list);
663 free(term);
664 }
Stephane Eranian8a398892014-01-17 16:34:05 +0100665
666 /*
667 * if no unit or scale foundin aliases, then
668 * set defaults as for evsel
669 * unit cannot left to NULL
670 */
671 if (*unit == NULL)
672 *unit = "";
673
674 if (*scale == 0.0)
675 *scale = 1.0;
676
Zheng Yana6146d52012-06-15 14:31:41 +0800677 return 0;
678}
679
Jiri Olsacd82a322012-03-15 20:09:17 +0100680int perf_pmu__new_format(struct list_head *list, char *name,
681 int config, unsigned long *bits)
682{
Arnaldo Carvalho de Melo5c6ccc32013-01-18 16:54:00 -0300683 struct perf_pmu_format *format;
Jiri Olsacd82a322012-03-15 20:09:17 +0100684
685 format = zalloc(sizeof(*format));
686 if (!format)
687 return -ENOMEM;
688
689 format->name = strdup(name);
690 format->value = config;
691 memcpy(format->bits, bits, sizeof(format->bits));
692
693 list_add_tail(&format->list, list);
694 return 0;
695}
696
697void perf_pmu__set_format(unsigned long *bits, long from, long to)
698{
699 long b;
700
701 if (!to)
702 to = from;
703
Sukadev Bhattiprolu15268132013-01-17 09:11:30 -0800704 memset(bits, 0, BITS_TO_BYTES(PERF_PMU_FORMAT_BITS));
Jiri Olsacd82a322012-03-15 20:09:17 +0100705 for (b = from; b <= to; b++)
706 set_bit(b, bits);
707}
Andi Kleendc098b32013-04-20 11:02:29 -0700708
709static char *format_alias(char *buf, int len, struct perf_pmu *pmu,
710 struct perf_pmu_alias *alias)
711{
712 snprintf(buf, len, "%s/%s/", pmu->name, alias->name);
713 return buf;
714}
715
716static char *format_alias_or(char *buf, int len, struct perf_pmu *pmu,
717 struct perf_pmu_alias *alias)
718{
719 snprintf(buf, len, "%s OR %s/%s/", alias->name, pmu->name, alias->name);
720 return buf;
721}
722
723static int cmp_string(const void *a, const void *b)
724{
725 const char * const *as = a;
726 const char * const *bs = b;
727 return strcmp(*as, *bs);
728}
729
730void print_pmu_events(const char *event_glob, bool name_only)
731{
732 struct perf_pmu *pmu;
733 struct perf_pmu_alias *alias;
734 char buf[1024];
735 int printed = 0;
736 int len, j;
737 char **aliases;
738
739 pmu = NULL;
740 len = 0;
741 while ((pmu = perf_pmu__scan(pmu)) != NULL)
742 list_for_each_entry(alias, &pmu->aliases, list)
743 len++;
744 aliases = malloc(sizeof(char *) * len);
745 if (!aliases)
746 return;
747 pmu = NULL;
748 j = 0;
749 while ((pmu = perf_pmu__scan(pmu)) != NULL)
750 list_for_each_entry(alias, &pmu->aliases, list) {
751 char *name = format_alias(buf, sizeof(buf), pmu, alias);
752 bool is_cpu = !strcmp(pmu->name, "cpu");
753
754 if (event_glob != NULL &&
755 !(strglobmatch(name, event_glob) ||
756 (!is_cpu && strglobmatch(alias->name,
757 event_glob))))
758 continue;
759 aliases[j] = name;
760 if (is_cpu && !name_only)
761 aliases[j] = format_alias_or(buf, sizeof(buf),
762 pmu, alias);
763 aliases[j] = strdup(aliases[j]);
764 j++;
765 }
766 len = j;
767 qsort(aliases, len, sizeof(char *), cmp_string);
768 for (j = 0; j < len; j++) {
769 if (name_only) {
770 printf("%s ", aliases[j]);
771 continue;
772 }
773 printf(" %-50s [Kernel PMU event]\n", aliases[j]);
Arnaldo Carvalho de Melo74cf2492013-12-27 16:55:14 -0300774 zfree(&aliases[j]);
Andi Kleendc098b32013-04-20 11:02:29 -0700775 printed++;
776 }
777 if (printed)
778 printf("\n");
779 free(aliases);
780}
Andi Kleen4cabc3d2013-08-21 16:47:26 -0700781
782bool pmu_have_event(const char *pname, const char *name)
783{
784 struct perf_pmu *pmu;
785 struct perf_pmu_alias *alias;
786
787 pmu = NULL;
788 while ((pmu = perf_pmu__scan(pmu)) != NULL) {
789 if (strcmp(pname, pmu->name))
790 continue;
791 list_for_each_entry(alias, &pmu->aliases, list)
792 if (!strcmp(alias->name, name))
793 return true;
794 }
795 return false;
796}