Commit | Line | Data |
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0793a61d TG |
1 | /* |
2 | * Performance counters: | |
3 | * | |
4 | * Copyright(C) 2008, Thomas Gleixner <tglx@linutronix.de> | |
5 | * Copyright(C) 2008, Red Hat, Inc., Ingo Molnar | |
6 | * | |
7 | * Data type definitions, declarations, prototypes. | |
8 | * | |
9 | * Started by: Thomas Gleixner and Ingo Molnar | |
10 | * | |
11 | * For licencing details see kernel-base/COPYING | |
12 | */ | |
13 | #ifndef _LINUX_PERF_COUNTER_H | |
14 | #define _LINUX_PERF_COUNTER_H | |
15 | ||
f3dfd265 PM |
16 | #include <linux/types.h> |
17 | #include <linux/ioctl.h> | |
9aaa131a | 18 | #include <asm/byteorder.h> |
0793a61d TG |
19 | |
20 | /* | |
9f66a381 IM |
21 | * User-space ABI bits: |
22 | */ | |
23 | ||
24 | /* | |
b8e83514 | 25 | * hw_event.type |
0793a61d | 26 | */ |
b8e83514 PZ |
27 | enum perf_event_types { |
28 | PERF_TYPE_HARDWARE = 0, | |
29 | PERF_TYPE_SOFTWARE = 1, | |
30 | PERF_TYPE_TRACEPOINT = 2, | |
31 | ||
0793a61d | 32 | /* |
b8e83514 | 33 | * available TYPE space, raw is the max value. |
0793a61d | 34 | */ |
9f66a381 | 35 | |
b8e83514 PZ |
36 | PERF_TYPE_RAW = 128, |
37 | }; | |
6c594c21 | 38 | |
b8e83514 PZ |
39 | /* |
40 | * Generalized performance counter event types, used by the hw_event.event_id | |
41 | * parameter of the sys_perf_counter_open() syscall: | |
42 | */ | |
43 | enum hw_event_ids { | |
9f66a381 | 44 | /* |
b8e83514 | 45 | * Common hardware events, generalized by the kernel: |
9f66a381 | 46 | */ |
b8e83514 PZ |
47 | PERF_COUNT_CPU_CYCLES = 0, |
48 | PERF_COUNT_INSTRUCTIONS = 1, | |
49 | PERF_COUNT_CACHE_REFERENCES = 2, | |
50 | PERF_COUNT_CACHE_MISSES = 3, | |
51 | PERF_COUNT_BRANCH_INSTRUCTIONS = 4, | |
52 | PERF_COUNT_BRANCH_MISSES = 5, | |
53 | PERF_COUNT_BUS_CYCLES = 6, | |
54 | ||
55 | PERF_HW_EVENTS_MAX = 7, | |
56 | }; | |
e077df4f | 57 | |
b8e83514 PZ |
58 | /* |
59 | * Special "software" counters provided by the kernel, even if the hardware | |
60 | * does not support performance counters. These counters measure various | |
61 | * physical and sw events of the kernel (and allow the profiling of them as | |
62 | * well): | |
63 | */ | |
64 | enum sw_event_ids { | |
65 | PERF_COUNT_CPU_CLOCK = 0, | |
66 | PERF_COUNT_TASK_CLOCK = 1, | |
67 | PERF_COUNT_PAGE_FAULTS = 2, | |
68 | PERF_COUNT_CONTEXT_SWITCHES = 3, | |
69 | PERF_COUNT_CPU_MIGRATIONS = 4, | |
70 | PERF_COUNT_PAGE_FAULTS_MIN = 5, | |
71 | PERF_COUNT_PAGE_FAULTS_MAJ = 6, | |
72 | ||
73 | PERF_SW_EVENTS_MAX = 7, | |
0793a61d TG |
74 | }; |
75 | ||
f4a2deb4 PZ |
76 | #define __PERF_COUNTER_MASK(name) \ |
77 | (((1ULL << PERF_COUNTER_##name##_BITS) - 1) << \ | |
78 | PERF_COUNTER_##name##_SHIFT) | |
79 | ||
80 | #define PERF_COUNTER_RAW_BITS 1 | |
81 | #define PERF_COUNTER_RAW_SHIFT 63 | |
82 | #define PERF_COUNTER_RAW_MASK __PERF_COUNTER_MASK(RAW) | |
83 | ||
84 | #define PERF_COUNTER_CONFIG_BITS 63 | |
85 | #define PERF_COUNTER_CONFIG_SHIFT 0 | |
86 | #define PERF_COUNTER_CONFIG_MASK __PERF_COUNTER_MASK(CONFIG) | |
87 | ||
88 | #define PERF_COUNTER_TYPE_BITS 7 | |
89 | #define PERF_COUNTER_TYPE_SHIFT 56 | |
90 | #define PERF_COUNTER_TYPE_MASK __PERF_COUNTER_MASK(TYPE) | |
91 | ||
92 | #define PERF_COUNTER_EVENT_BITS 56 | |
93 | #define PERF_COUNTER_EVENT_SHIFT 0 | |
94 | #define PERF_COUNTER_EVENT_MASK __PERF_COUNTER_MASK(EVENT) | |
95 | ||
8a057d84 PZ |
96 | /* |
97 | * Bits that can be set in hw_event.record_type to request information | |
98 | * in the overflow packets. | |
99 | */ | |
100 | enum perf_counter_record_format { | |
101 | PERF_RECORD_IP = 1U << 0, | |
102 | PERF_RECORD_TID = 1U << 1, | |
4d855457 | 103 | PERF_RECORD_TIME = 1U << 2, |
78f13e95 PZ |
104 | PERF_RECORD_ADDR = 1U << 3, |
105 | PERF_RECORD_GROUP = 1U << 4, | |
106 | PERF_RECORD_CALLCHAIN = 1U << 5, | |
a85f61ab | 107 | PERF_RECORD_CONFIG = 1U << 6, |
8a057d84 PZ |
108 | }; |
109 | ||
53cfbf59 PM |
110 | /* |
111 | * Bits that can be set in hw_event.read_format to request that | |
112 | * reads on the counter should return the indicated quantities, | |
113 | * in increasing order of bit value, after the counter value. | |
114 | */ | |
115 | enum perf_counter_read_format { | |
116 | PERF_FORMAT_TOTAL_TIME_ENABLED = 1, | |
117 | PERF_FORMAT_TOTAL_TIME_RUNNING = 2, | |
118 | }; | |
119 | ||
9f66a381 IM |
120 | /* |
121 | * Hardware event to monitor via a performance monitoring counter: | |
122 | */ | |
123 | struct perf_counter_hw_event { | |
f4a2deb4 PZ |
124 | /* |
125 | * The MSB of the config word signifies if the rest contains cpu | |
126 | * specific (raw) counter configuration data, if unset, the next | |
127 | * 7 bits are an event type and the rest of the bits are the event | |
128 | * identifier. | |
129 | */ | |
130 | __u64 config; | |
9f66a381 | 131 | |
f3dfd265 | 132 | __u64 irq_period; |
8a057d84 PZ |
133 | __u32 record_type; |
134 | __u32 read_format; | |
9f66a381 | 135 | |
2743a5b0 | 136 | __u64 disabled : 1, /* off by default */ |
0475f9ea | 137 | nmi : 1, /* NMI sampling */ |
0475f9ea PM |
138 | inherit : 1, /* children inherit it */ |
139 | pinned : 1, /* must always be on PMU */ | |
140 | exclusive : 1, /* only group on PMU */ | |
141 | exclude_user : 1, /* don't count user */ | |
142 | exclude_kernel : 1, /* ditto kernel */ | |
143 | exclude_hv : 1, /* ditto hypervisor */ | |
2743a5b0 | 144 | exclude_idle : 1, /* don't count when idle */ |
0a4a9391 PZ |
145 | mmap : 1, /* include mmap data */ |
146 | munmap : 1, /* include munmap data */ | |
8d1b2d93 | 147 | comm : 1, /* include comm data */ |
0475f9ea | 148 | |
8d1b2d93 | 149 | __reserved_1 : 52; |
2743a5b0 PM |
150 | |
151 | __u32 extra_config_len; | |
c457810a | 152 | __u32 wakeup_events; /* wakeup every n events */ |
9f66a381 | 153 | |
f3dfd265 | 154 | __u64 __reserved_2; |
2743a5b0 | 155 | __u64 __reserved_3; |
eab656ae TG |
156 | }; |
157 | ||
d859e29f PM |
158 | /* |
159 | * Ioctls that can be done on a perf counter fd: | |
160 | */ | |
3df5edad PZ |
161 | #define PERF_COUNTER_IOC_ENABLE _IOW('$', 0, u32) |
162 | #define PERF_COUNTER_IOC_DISABLE _IOW('$', 1, u32) | |
79f14641 | 163 | #define PERF_COUNTER_IOC_REFRESH _IOW('$', 2, u32) |
3df5edad PZ |
164 | #define PERF_COUNTER_IOC_RESET _IOW('$', 3, u32) |
165 | ||
166 | enum perf_counter_ioc_flags { | |
167 | PERF_IOC_FLAG_GROUP = 1U << 0, | |
168 | }; | |
d859e29f | 169 | |
37d81828 PM |
170 | /* |
171 | * Structure of the page that can be mapped via mmap | |
172 | */ | |
173 | struct perf_counter_mmap_page { | |
174 | __u32 version; /* version number of this structure */ | |
175 | __u32 compat_version; /* lowest version this is compat with */ | |
38ff667b PZ |
176 | |
177 | /* | |
178 | * Bits needed to read the hw counters in user-space. | |
179 | * | |
92f22a38 PZ |
180 | * u32 seq; |
181 | * s64 count; | |
38ff667b | 182 | * |
a2e87d06 PZ |
183 | * do { |
184 | * seq = pc->lock; | |
38ff667b | 185 | * |
a2e87d06 PZ |
186 | * barrier() |
187 | * if (pc->index) { | |
188 | * count = pmc_read(pc->index - 1); | |
189 | * count += pc->offset; | |
190 | * } else | |
191 | * goto regular_read; | |
38ff667b | 192 | * |
a2e87d06 PZ |
193 | * barrier(); |
194 | * } while (pc->lock != seq); | |
38ff667b | 195 | * |
92f22a38 PZ |
196 | * NOTE: for obvious reason this only works on self-monitoring |
197 | * processes. | |
38ff667b | 198 | */ |
37d81828 PM |
199 | __u32 lock; /* seqlock for synchronization */ |
200 | __u32 index; /* hardware counter identifier */ | |
201 | __s64 offset; /* add to hardware counter value */ | |
7b732a75 | 202 | |
38ff667b PZ |
203 | /* |
204 | * Control data for the mmap() data buffer. | |
205 | * | |
206 | * User-space reading this value should issue an rmb(), on SMP capable | |
207 | * platforms, after reading this value -- see perf_counter_wakeup(). | |
208 | */ | |
7b732a75 | 209 | __u32 data_head; /* head in the data section */ |
37d81828 PM |
210 | }; |
211 | ||
6b6e5486 PZ |
212 | #define PERF_EVENT_MISC_KERNEL (1 << 0) |
213 | #define PERF_EVENT_MISC_USER (1 << 1) | |
214 | #define PERF_EVENT_MISC_OVERFLOW (1 << 2) | |
6fab0192 | 215 | |
5c148194 PZ |
216 | struct perf_event_header { |
217 | __u32 type; | |
6fab0192 PZ |
218 | __u16 misc; |
219 | __u16 size; | |
5c148194 PZ |
220 | }; |
221 | ||
222 | enum perf_event_type { | |
5ed00415 | 223 | |
0c593b34 PZ |
224 | /* |
225 | * The MMAP events record the PROT_EXEC mappings so that we can | |
226 | * correlate userspace IPs to code. They have the following structure: | |
227 | * | |
228 | * struct { | |
229 | * struct perf_event_header header; | |
230 | * | |
231 | * u32 pid, tid; | |
232 | * u64 addr; | |
233 | * u64 len; | |
234 | * u64 pgoff; | |
235 | * char filename[]; | |
236 | * }; | |
237 | */ | |
8a057d84 PZ |
238 | PERF_EVENT_MMAP = 1, |
239 | PERF_EVENT_MUNMAP = 2, | |
0a4a9391 | 240 | |
8d1b2d93 PZ |
241 | /* |
242 | * struct { | |
243 | * struct perf_event_header header; | |
244 | * | |
245 | * u32 pid, tid; | |
246 | * char comm[]; | |
247 | * }; | |
248 | */ | |
249 | PERF_EVENT_COMM = 3, | |
250 | ||
8a057d84 | 251 | /* |
6b6e5486 PZ |
252 | * When header.misc & PERF_EVENT_MISC_OVERFLOW the event_type field |
253 | * will be PERF_RECORD_* | |
0c593b34 PZ |
254 | * |
255 | * struct { | |
256 | * struct perf_event_header header; | |
257 | * | |
6b6e5486 PZ |
258 | * { u64 ip; } && PERF_RECORD_IP |
259 | * { u32 pid, tid; } && PERF_RECORD_TID | |
4d855457 | 260 | * { u64 time; } && PERF_RECORD_TIME |
78f13e95 | 261 | * { u64 addr; } && PERF_RECORD_ADDR |
a85f61ab | 262 | * { u64 config; } && PERF_RECORD_CONFIG |
0c593b34 PZ |
263 | * |
264 | * { u64 nr; | |
6b6e5486 | 265 | * { u64 event, val; } cnt[nr]; } && PERF_RECORD_GROUP |
0c593b34 PZ |
266 | * |
267 | * { u16 nr, | |
268 | * hv, | |
269 | * kernel, | |
270 | * user; | |
6b6e5486 | 271 | * u64 ips[nr]; } && PERF_RECORD_CALLCHAIN |
0c593b34 | 272 | * }; |
8a057d84 | 273 | */ |
5c148194 PZ |
274 | }; |
275 | ||
f3dfd265 | 276 | #ifdef __KERNEL__ |
9f66a381 | 277 | /* |
f3dfd265 | 278 | * Kernel-internal data types and definitions: |
9f66a381 IM |
279 | */ |
280 | ||
f3dfd265 PM |
281 | #ifdef CONFIG_PERF_COUNTERS |
282 | # include <asm/perf_counter.h> | |
283 | #endif | |
284 | ||
285 | #include <linux/list.h> | |
286 | #include <linux/mutex.h> | |
287 | #include <linux/rculist.h> | |
288 | #include <linux/rcupdate.h> | |
289 | #include <linux/spinlock.h> | |
d6d020e9 | 290 | #include <linux/hrtimer.h> |
3c446b3d | 291 | #include <linux/fs.h> |
f3dfd265 PM |
292 | #include <asm/atomic.h> |
293 | ||
294 | struct task_struct; | |
295 | ||
f4a2deb4 PZ |
296 | static inline u64 perf_event_raw(struct perf_counter_hw_event *hw_event) |
297 | { | |
298 | return hw_event->config & PERF_COUNTER_RAW_MASK; | |
299 | } | |
300 | ||
301 | static inline u64 perf_event_config(struct perf_counter_hw_event *hw_event) | |
302 | { | |
303 | return hw_event->config & PERF_COUNTER_CONFIG_MASK; | |
304 | } | |
305 | ||
306 | static inline u64 perf_event_type(struct perf_counter_hw_event *hw_event) | |
307 | { | |
308 | return (hw_event->config & PERF_COUNTER_TYPE_MASK) >> | |
309 | PERF_COUNTER_TYPE_SHIFT; | |
310 | } | |
311 | ||
312 | static inline u64 perf_event_id(struct perf_counter_hw_event *hw_event) | |
313 | { | |
314 | return hw_event->config & PERF_COUNTER_EVENT_MASK; | |
315 | } | |
316 | ||
0793a61d | 317 | /** |
9f66a381 | 318 | * struct hw_perf_counter - performance counter hardware details: |
0793a61d TG |
319 | */ |
320 | struct hw_perf_counter { | |
ee06094f | 321 | #ifdef CONFIG_PERF_COUNTERS |
d6d020e9 PZ |
322 | union { |
323 | struct { /* hardware */ | |
324 | u64 config; | |
325 | unsigned long config_base; | |
326 | unsigned long counter_base; | |
327 | int nmi; | |
6f00cada | 328 | int idx; |
d6d020e9 PZ |
329 | }; |
330 | union { /* software */ | |
331 | atomic64_t count; | |
332 | struct hrtimer hrtimer; | |
333 | }; | |
334 | }; | |
ee06094f | 335 | atomic64_t prev_count; |
9f66a381 | 336 | u64 irq_period; |
ee06094f IM |
337 | atomic64_t period_left; |
338 | #endif | |
0793a61d TG |
339 | }; |
340 | ||
621a01ea IM |
341 | struct perf_counter; |
342 | ||
343 | /** | |
4aeb0b42 | 344 | * struct pmu - generic performance monitoring unit |
621a01ea | 345 | */ |
4aeb0b42 | 346 | struct pmu { |
95cdd2e7 | 347 | int (*enable) (struct perf_counter *counter); |
7671581f IM |
348 | void (*disable) (struct perf_counter *counter); |
349 | void (*read) (struct perf_counter *counter); | |
621a01ea IM |
350 | }; |
351 | ||
6a930700 IM |
352 | /** |
353 | * enum perf_counter_active_state - the states of a counter | |
354 | */ | |
355 | enum perf_counter_active_state { | |
3b6f9e5c | 356 | PERF_COUNTER_STATE_ERROR = -2, |
6a930700 IM |
357 | PERF_COUNTER_STATE_OFF = -1, |
358 | PERF_COUNTER_STATE_INACTIVE = 0, | |
359 | PERF_COUNTER_STATE_ACTIVE = 1, | |
360 | }; | |
361 | ||
9b51f66d IM |
362 | struct file; |
363 | ||
7b732a75 PZ |
364 | struct perf_mmap_data { |
365 | struct rcu_head rcu_head; | |
8740f941 | 366 | int nr_pages; /* nr of data pages */ |
c5078f78 | 367 | int nr_locked; /* nr pages mlocked */ |
8740f941 | 368 | |
c33a0bc4 | 369 | atomic_t poll; /* POLL_ for wakeups */ |
8740f941 PZ |
370 | atomic_t head; /* write position */ |
371 | atomic_t events; /* event limit */ | |
372 | ||
c66de4a5 | 373 | atomic_t done_head; /* completed head */ |
c33a0bc4 PZ |
374 | atomic_t lock; /* concurrent writes */ |
375 | ||
c66de4a5 PZ |
376 | atomic_t wakeup; /* needs a wakeup */ |
377 | ||
7b732a75 PZ |
378 | struct perf_counter_mmap_page *user_page; |
379 | void *data_pages[0]; | |
380 | }; | |
381 | ||
671dec5d PZ |
382 | struct perf_pending_entry { |
383 | struct perf_pending_entry *next; | |
384 | void (*func)(struct perf_pending_entry *); | |
925d519a PZ |
385 | }; |
386 | ||
0793a61d TG |
387 | /** |
388 | * struct perf_counter - performance counter kernel representation: | |
389 | */ | |
390 | struct perf_counter { | |
ee06094f | 391 | #ifdef CONFIG_PERF_COUNTERS |
04289bb9 | 392 | struct list_head list_entry; |
592903cd | 393 | struct list_head event_entry; |
04289bb9 | 394 | struct list_head sibling_list; |
5c148194 | 395 | int nr_siblings; |
04289bb9 | 396 | struct perf_counter *group_leader; |
4aeb0b42 | 397 | const struct pmu *pmu; |
04289bb9 | 398 | |
6a930700 | 399 | enum perf_counter_active_state state; |
c07c99b6 | 400 | enum perf_counter_active_state prev_state; |
0793a61d | 401 | atomic64_t count; |
ee06094f | 402 | |
53cfbf59 PM |
403 | /* |
404 | * These are the total time in nanoseconds that the counter | |
405 | * has been enabled (i.e. eligible to run, and the task has | |
406 | * been scheduled in, if this is a per-task counter) | |
407 | * and running (scheduled onto the CPU), respectively. | |
408 | * | |
409 | * They are computed from tstamp_enabled, tstamp_running and | |
410 | * tstamp_stopped when the counter is in INACTIVE or ACTIVE state. | |
411 | */ | |
412 | u64 total_time_enabled; | |
413 | u64 total_time_running; | |
414 | ||
415 | /* | |
416 | * These are timestamps used for computing total_time_enabled | |
417 | * and total_time_running when the counter is in INACTIVE or | |
418 | * ACTIVE state, measured in nanoseconds from an arbitrary point | |
419 | * in time. | |
420 | * tstamp_enabled: the notional time when the counter was enabled | |
421 | * tstamp_running: the notional time when the counter was scheduled on | |
422 | * tstamp_stopped: in INACTIVE state, the notional time when the | |
423 | * counter was scheduled off. | |
424 | */ | |
425 | u64 tstamp_enabled; | |
426 | u64 tstamp_running; | |
427 | u64 tstamp_stopped; | |
428 | ||
9f66a381 | 429 | struct perf_counter_hw_event hw_event; |
0793a61d TG |
430 | struct hw_perf_counter hw; |
431 | ||
432 | struct perf_counter_context *ctx; | |
433 | struct task_struct *task; | |
9b51f66d | 434 | struct file *filp; |
0793a61d | 435 | |
9b51f66d | 436 | struct perf_counter *parent; |
d859e29f PM |
437 | struct list_head child_list; |
438 | ||
53cfbf59 PM |
439 | /* |
440 | * These accumulate total time (in nanoseconds) that children | |
441 | * counters have been enabled and running, respectively. | |
442 | */ | |
443 | atomic64_t child_total_time_enabled; | |
444 | atomic64_t child_total_time_running; | |
445 | ||
0793a61d | 446 | /* |
d859e29f | 447 | * Protect attach/detach and child_list: |
0793a61d TG |
448 | */ |
449 | struct mutex mutex; | |
450 | ||
451 | int oncpu; | |
452 | int cpu; | |
453 | ||
7b732a75 PZ |
454 | /* mmap bits */ |
455 | struct mutex mmap_mutex; | |
456 | atomic_t mmap_count; | |
457 | struct perf_mmap_data *data; | |
37d81828 | 458 | |
7b732a75 | 459 | /* poll related */ |
0793a61d | 460 | wait_queue_head_t waitq; |
3c446b3d | 461 | struct fasync_struct *fasync; |
79f14641 PZ |
462 | |
463 | /* delayed work for NMIs and such */ | |
464 | int pending_wakeup; | |
4c9e2542 | 465 | int pending_kill; |
79f14641 | 466 | int pending_disable; |
671dec5d | 467 | struct perf_pending_entry pending; |
592903cd | 468 | |
79f14641 PZ |
469 | atomic_t event_limit; |
470 | ||
e077df4f | 471 | void (*destroy)(struct perf_counter *); |
592903cd | 472 | struct rcu_head rcu_head; |
ee06094f | 473 | #endif |
0793a61d TG |
474 | }; |
475 | ||
476 | /** | |
477 | * struct perf_counter_context - counter context structure | |
478 | * | |
479 | * Used as a container for task counters and CPU counters as well: | |
480 | */ | |
481 | struct perf_counter_context { | |
482 | #ifdef CONFIG_PERF_COUNTERS | |
483 | /* | |
d859e29f PM |
484 | * Protect the states of the counters in the list, |
485 | * nr_active, and the list: | |
0793a61d TG |
486 | */ |
487 | spinlock_t lock; | |
d859e29f PM |
488 | /* |
489 | * Protect the list of counters. Locking either mutex or lock | |
490 | * is sufficient to ensure the list doesn't change; to change | |
491 | * the list you need to lock both the mutex and the spinlock. | |
492 | */ | |
493 | struct mutex mutex; | |
04289bb9 IM |
494 | |
495 | struct list_head counter_list; | |
592903cd | 496 | struct list_head event_list; |
0793a61d TG |
497 | int nr_counters; |
498 | int nr_active; | |
d859e29f | 499 | int is_active; |
0793a61d | 500 | struct task_struct *task; |
53cfbf59 PM |
501 | |
502 | /* | |
4af4998b | 503 | * Context clock, runs when context enabled. |
53cfbf59 | 504 | */ |
4af4998b PZ |
505 | u64 time; |
506 | u64 timestamp; | |
0793a61d TG |
507 | #endif |
508 | }; | |
509 | ||
510 | /** | |
511 | * struct perf_counter_cpu_context - per cpu counter context structure | |
512 | */ | |
513 | struct perf_cpu_context { | |
514 | struct perf_counter_context ctx; | |
515 | struct perf_counter_context *task_ctx; | |
516 | int active_oncpu; | |
517 | int max_pertask; | |
3b6f9e5c | 518 | int exclusive; |
96f6d444 PZ |
519 | |
520 | /* | |
521 | * Recursion avoidance: | |
522 | * | |
523 | * task, softirq, irq, nmi context | |
524 | */ | |
525 | int recursion[4]; | |
0793a61d TG |
526 | }; |
527 | ||
829b42dd RR |
528 | #ifdef CONFIG_PERF_COUNTERS |
529 | ||
0793a61d TG |
530 | /* |
531 | * Set by architecture code: | |
532 | */ | |
533 | extern int perf_max_counters; | |
534 | ||
4aeb0b42 | 535 | extern const struct pmu *hw_perf_counter_init(struct perf_counter *counter); |
621a01ea | 536 | |
0793a61d TG |
537 | extern void perf_counter_task_sched_in(struct task_struct *task, int cpu); |
538 | extern void perf_counter_task_sched_out(struct task_struct *task, int cpu); | |
539 | extern void perf_counter_task_tick(struct task_struct *task, int cpu); | |
9b51f66d IM |
540 | extern void perf_counter_init_task(struct task_struct *child); |
541 | extern void perf_counter_exit_task(struct task_struct *child); | |
925d519a | 542 | extern void perf_counter_do_pending(void); |
0793a61d | 543 | extern void perf_counter_print_debug(void); |
1b023a96 | 544 | extern void perf_counter_unthrottle(void); |
01b2838c IM |
545 | extern u64 hw_perf_save_disable(void); |
546 | extern void hw_perf_restore(u64 ctrl); | |
1d1c7ddb IM |
547 | extern int perf_counter_task_disable(void); |
548 | extern int perf_counter_task_enable(void); | |
3cbed429 PM |
549 | extern int hw_perf_group_sched_in(struct perf_counter *group_leader, |
550 | struct perf_cpu_context *cpuctx, | |
551 | struct perf_counter_context *ctx, int cpu); | |
37d81828 | 552 | extern void perf_counter_update_userpage(struct perf_counter *counter); |
5c92d124 | 553 | |
f6c7d5fe | 554 | extern int perf_counter_overflow(struct perf_counter *counter, |
78f13e95 | 555 | int nmi, struct pt_regs *regs, u64 addr); |
3b6f9e5c PM |
556 | /* |
557 | * Return 1 for a software counter, 0 for a hardware counter | |
558 | */ | |
559 | static inline int is_software_counter(struct perf_counter *counter) | |
560 | { | |
f4a2deb4 PZ |
561 | return !perf_event_raw(&counter->hw_event) && |
562 | perf_event_type(&counter->hw_event) != PERF_TYPE_HARDWARE; | |
3b6f9e5c PM |
563 | } |
564 | ||
78f13e95 | 565 | extern void perf_swcounter_event(u32, u64, int, struct pt_regs *, u64); |
15dbf27c | 566 | |
0a4a9391 PZ |
567 | extern void perf_counter_mmap(unsigned long addr, unsigned long len, |
568 | unsigned long pgoff, struct file *file); | |
569 | ||
570 | extern void perf_counter_munmap(unsigned long addr, unsigned long len, | |
571 | unsigned long pgoff, struct file *file); | |
572 | ||
8d1b2d93 PZ |
573 | extern void perf_counter_comm(struct task_struct *tsk); |
574 | ||
9c03d88e | 575 | #define MAX_STACK_DEPTH 255 |
394ee076 PZ |
576 | |
577 | struct perf_callchain_entry { | |
9c03d88e | 578 | u16 nr, hv, kernel, user; |
394ee076 PZ |
579 | u64 ip[MAX_STACK_DEPTH]; |
580 | }; | |
581 | ||
582 | extern struct perf_callchain_entry *perf_callchain(struct pt_regs *regs); | |
583 | ||
1ccd1549 | 584 | extern int sysctl_perf_counter_priv; |
c5078f78 | 585 | extern int sysctl_perf_counter_mlock; |
1ccd1549 | 586 | |
0d905bca IM |
587 | extern void perf_counter_init(void); |
588 | ||
0793a61d TG |
589 | #else |
590 | static inline void | |
591 | perf_counter_task_sched_in(struct task_struct *task, int cpu) { } | |
592 | static inline void | |
593 | perf_counter_task_sched_out(struct task_struct *task, int cpu) { } | |
594 | static inline void | |
595 | perf_counter_task_tick(struct task_struct *task, int cpu) { } | |
9b51f66d IM |
596 | static inline void perf_counter_init_task(struct task_struct *child) { } |
597 | static inline void perf_counter_exit_task(struct task_struct *child) { } | |
925d519a | 598 | static inline void perf_counter_do_pending(void) { } |
0793a61d | 599 | static inline void perf_counter_print_debug(void) { } |
1b023a96 | 600 | static inline void perf_counter_unthrottle(void) { } |
15dbf27c | 601 | static inline void hw_perf_restore(u64 ctrl) { } |
01b2838c | 602 | static inline u64 hw_perf_save_disable(void) { return 0; } |
1d1c7ddb IM |
603 | static inline int perf_counter_task_disable(void) { return -EINVAL; } |
604 | static inline int perf_counter_task_enable(void) { return -EINVAL; } | |
15dbf27c | 605 | |
925d519a | 606 | static inline void |
78f13e95 PZ |
607 | perf_swcounter_event(u32 event, u64 nr, int nmi, |
608 | struct pt_regs *regs, u64 addr) { } | |
0a4a9391 PZ |
609 | |
610 | static inline void | |
611 | perf_counter_mmap(unsigned long addr, unsigned long len, | |
612 | unsigned long pgoff, struct file *file) { } | |
613 | ||
614 | static inline void | |
615 | perf_counter_munmap(unsigned long addr, unsigned long len, | |
0d905bca | 616 | unsigned long pgoff, struct file *file) { } |
0a4a9391 | 617 | |
8d1b2d93 | 618 | static inline void perf_counter_comm(struct task_struct *tsk) { } |
0d905bca | 619 | static inline void perf_counter_init(void) { } |
0793a61d TG |
620 | #endif |
621 | ||
f3dfd265 | 622 | #endif /* __KERNEL__ */ |
0793a61d | 623 | #endif /* _LINUX_PERF_COUNTER_H */ |