Commit | Line | Data |
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0793a61d | 1 | /* |
57c0c15b | 2 | * Performance events: |
0793a61d | 3 | * |
a308444c | 4 | * Copyright (C) 2008-2009, Thomas Gleixner <tglx@linutronix.de> |
e7e7ee2e IM |
5 | * Copyright (C) 2008-2011, Red Hat, Inc., Ingo Molnar |
6 | * Copyright (C) 2008-2011, Red Hat, Inc., Peter Zijlstra | |
0793a61d | 7 | * |
57c0c15b | 8 | * Data type definitions, declarations, prototypes. |
0793a61d | 9 | * |
a308444c | 10 | * Started by: Thomas Gleixner and Ingo Molnar |
0793a61d | 11 | * |
57c0c15b | 12 | * For licencing details see kernel-base/COPYING |
0793a61d | 13 | */ |
cdd6c482 IM |
14 | #ifndef _LINUX_PERF_EVENT_H |
15 | #define _LINUX_PERF_EVENT_H | |
0793a61d | 16 | |
607ca46e | 17 | #include <uapi/linux/perf_event.h> |
0793a61d | 18 | |
9f66a381 | 19 | /* |
f3dfd265 | 20 | * Kernel-internal data types and definitions: |
9f66a381 IM |
21 | */ |
22 | ||
cdd6c482 | 23 | #ifdef CONFIG_PERF_EVENTS |
e5d1367f | 24 | # include <linux/cgroup.h> |
cdd6c482 | 25 | # include <asm/perf_event.h> |
7be79236 | 26 | # include <asm/local64.h> |
f3dfd265 PM |
27 | #endif |
28 | ||
39447b38 | 29 | struct perf_guest_info_callbacks { |
e7e7ee2e IM |
30 | int (*is_in_guest)(void); |
31 | int (*is_user_mode)(void); | |
32 | unsigned long (*get_guest_ip)(void); | |
39447b38 ZY |
33 | }; |
34 | ||
2ff6cfd7 AB |
35 | #ifdef CONFIG_HAVE_HW_BREAKPOINT |
36 | #include <asm/hw_breakpoint.h> | |
37 | #endif | |
38 | ||
f3dfd265 PM |
39 | #include <linux/list.h> |
40 | #include <linux/mutex.h> | |
41 | #include <linux/rculist.h> | |
42 | #include <linux/rcupdate.h> | |
43 | #include <linux/spinlock.h> | |
d6d020e9 | 44 | #include <linux/hrtimer.h> |
3c446b3d | 45 | #include <linux/fs.h> |
709e50cf | 46 | #include <linux/pid_namespace.h> |
906010b2 | 47 | #include <linux/workqueue.h> |
5331d7b8 | 48 | #include <linux/ftrace.h> |
85cfabbc | 49 | #include <linux/cpu.h> |
e360adbe | 50 | #include <linux/irq_work.h> |
c5905afb | 51 | #include <linux/static_key.h> |
60063497 | 52 | #include <linux/atomic.h> |
641cc938 | 53 | #include <linux/sysfs.h> |
4018994f | 54 | #include <linux/perf_regs.h> |
fa588151 | 55 | #include <asm/local.h> |
f3dfd265 | 56 | |
f9188e02 PZ |
57 | struct perf_callchain_entry { |
58 | __u64 nr; | |
59 | __u64 ip[PERF_MAX_STACK_DEPTH]; | |
60 | }; | |
61 | ||
3a43ce68 FW |
62 | struct perf_raw_record { |
63 | u32 size; | |
64 | void *data; | |
f413cdb8 FW |
65 | }; |
66 | ||
bce38cd5 SE |
67 | /* |
68 | * single taken branch record layout: | |
69 | * | |
70 | * from: source instruction (may not always be a branch insn) | |
71 | * to: branch target | |
72 | * mispred: branch target was mispredicted | |
73 | * predicted: branch target was predicted | |
74 | * | |
75 | * support for mispred, predicted is optional. In case it | |
76 | * is not supported mispred = predicted = 0. | |
77 | */ | |
caff2bef | 78 | struct perf_branch_entry { |
bce38cd5 SE |
79 | __u64 from; |
80 | __u64 to; | |
81 | __u64 mispred:1, /* target mispredicted */ | |
82 | predicted:1,/* target predicted */ | |
83 | reserved:62; | |
caff2bef PZ |
84 | }; |
85 | ||
bce38cd5 SE |
86 | /* |
87 | * branch stack layout: | |
88 | * nr: number of taken branches stored in entries[] | |
89 | * | |
90 | * Note that nr can vary from sample to sample | |
91 | * branches (to, from) are stored from most recent | |
92 | * to least recent, i.e., entries[0] contains the most | |
93 | * recent branch. | |
94 | */ | |
caff2bef PZ |
95 | struct perf_branch_stack { |
96 | __u64 nr; | |
97 | struct perf_branch_entry entries[0]; | |
98 | }; | |
99 | ||
4018994f JO |
100 | struct perf_regs_user { |
101 | __u64 abi; | |
102 | struct pt_regs *regs; | |
103 | }; | |
104 | ||
f3dfd265 PM |
105 | struct task_struct; |
106 | ||
efc9f05d SE |
107 | /* |
108 | * extra PMU register associated with an event | |
109 | */ | |
110 | struct hw_perf_event_extra { | |
111 | u64 config; /* register value */ | |
112 | unsigned int reg; /* register address or index */ | |
113 | int alloc; /* extra register already allocated */ | |
114 | int idx; /* index in shared_regs->regs[] */ | |
115 | }; | |
116 | ||
0793a61d | 117 | /** |
cdd6c482 | 118 | * struct hw_perf_event - performance event hardware details: |
0793a61d | 119 | */ |
cdd6c482 IM |
120 | struct hw_perf_event { |
121 | #ifdef CONFIG_PERF_EVENTS | |
d6d020e9 PZ |
122 | union { |
123 | struct { /* hardware */ | |
a308444c | 124 | u64 config; |
447a194b | 125 | u64 last_tag; |
a308444c | 126 | unsigned long config_base; |
cdd6c482 | 127 | unsigned long event_base; |
c48b6053 | 128 | int event_base_rdpmc; |
a308444c | 129 | int idx; |
447a194b | 130 | int last_cpu; |
bce38cd5 | 131 | |
efc9f05d | 132 | struct hw_perf_event_extra extra_reg; |
bce38cd5 | 133 | struct hw_perf_event_extra branch_reg; |
d6d020e9 | 134 | }; |
721a669b | 135 | struct { /* software */ |
a308444c | 136 | struct hrtimer hrtimer; |
d6d020e9 | 137 | }; |
24f1e32c | 138 | #ifdef CONFIG_HAVE_HW_BREAKPOINT |
45a73372 FW |
139 | struct { /* breakpoint */ |
140 | struct arch_hw_breakpoint info; | |
141 | struct list_head bp_list; | |
d580ff86 PZ |
142 | /* |
143 | * Crufty hack to avoid the chicken and egg | |
144 | * problem hw_breakpoint has with context | |
145 | * creation and event initalization. | |
146 | */ | |
147 | struct task_struct *bp_target; | |
45a73372 | 148 | }; |
24f1e32c | 149 | #endif |
d6d020e9 | 150 | }; |
a4eaf7f1 | 151 | int state; |
e7850595 | 152 | local64_t prev_count; |
b23f3325 | 153 | u64 sample_period; |
9e350de3 | 154 | u64 last_period; |
e7850595 | 155 | local64_t period_left; |
e050e3f0 | 156 | u64 interrupts_seq; |
60db5e09 | 157 | u64 interrupts; |
6a24ed6c | 158 | |
abd50713 PZ |
159 | u64 freq_time_stamp; |
160 | u64 freq_count_stamp; | |
ee06094f | 161 | #endif |
0793a61d TG |
162 | }; |
163 | ||
a4eaf7f1 PZ |
164 | /* |
165 | * hw_perf_event::state flags | |
166 | */ | |
167 | #define PERF_HES_STOPPED 0x01 /* the counter is stopped */ | |
168 | #define PERF_HES_UPTODATE 0x02 /* event->count up-to-date */ | |
169 | #define PERF_HES_ARCH 0x04 | |
170 | ||
cdd6c482 | 171 | struct perf_event; |
621a01ea | 172 | |
8d2cacbb PZ |
173 | /* |
174 | * Common implementation detail of pmu::{start,commit,cancel}_txn | |
175 | */ | |
176 | #define PERF_EVENT_TXN 0x1 | |
6bde9b6c | 177 | |
621a01ea | 178 | /** |
4aeb0b42 | 179 | * struct pmu - generic performance monitoring unit |
621a01ea | 180 | */ |
4aeb0b42 | 181 | struct pmu { |
b0a873eb PZ |
182 | struct list_head entry; |
183 | ||
abe43400 | 184 | struct device *dev; |
0c9d42ed | 185 | const struct attribute_group **attr_groups; |
2e80a82a PZ |
186 | char *name; |
187 | int type; | |
188 | ||
108b02cf PZ |
189 | int * __percpu pmu_disable_count; |
190 | struct perf_cpu_context * __percpu pmu_cpu_context; | |
8dc85d54 | 191 | int task_ctx_nr; |
6bde9b6c LM |
192 | |
193 | /* | |
a4eaf7f1 PZ |
194 | * Fully disable/enable this PMU, can be used to protect from the PMI |
195 | * as well as for lazy/batch writing of the MSRs. | |
6bde9b6c | 196 | */ |
ad5133b7 PZ |
197 | void (*pmu_enable) (struct pmu *pmu); /* optional */ |
198 | void (*pmu_disable) (struct pmu *pmu); /* optional */ | |
6bde9b6c | 199 | |
8d2cacbb | 200 | /* |
a4eaf7f1 | 201 | * Try and initialize the event for this PMU. |
24cd7f54 | 202 | * Should return -ENOENT when the @event doesn't match this PMU. |
8d2cacbb | 203 | */ |
b0a873eb PZ |
204 | int (*event_init) (struct perf_event *event); |
205 | ||
a4eaf7f1 PZ |
206 | #define PERF_EF_START 0x01 /* start the counter when adding */ |
207 | #define PERF_EF_RELOAD 0x02 /* reload the counter when starting */ | |
208 | #define PERF_EF_UPDATE 0x04 /* update the counter when stopping */ | |
209 | ||
8d2cacbb | 210 | /* |
a4eaf7f1 PZ |
211 | * Adds/Removes a counter to/from the PMU, can be done inside |
212 | * a transaction, see the ->*_txn() methods. | |
213 | */ | |
214 | int (*add) (struct perf_event *event, int flags); | |
215 | void (*del) (struct perf_event *event, int flags); | |
216 | ||
217 | /* | |
218 | * Starts/Stops a counter present on the PMU. The PMI handler | |
219 | * should stop the counter when perf_event_overflow() returns | |
220 | * !0. ->start() will be used to continue. | |
221 | */ | |
222 | void (*start) (struct perf_event *event, int flags); | |
223 | void (*stop) (struct perf_event *event, int flags); | |
224 | ||
225 | /* | |
226 | * Updates the counter value of the event. | |
227 | */ | |
cdd6c482 | 228 | void (*read) (struct perf_event *event); |
6bde9b6c LM |
229 | |
230 | /* | |
24cd7f54 PZ |
231 | * Group events scheduling is treated as a transaction, add |
232 | * group events as a whole and perform one schedulability test. | |
233 | * If the test fails, roll back the whole group | |
a4eaf7f1 PZ |
234 | * |
235 | * Start the transaction, after this ->add() doesn't need to | |
24cd7f54 | 236 | * do schedulability tests. |
8d2cacbb | 237 | */ |
e7e7ee2e | 238 | void (*start_txn) (struct pmu *pmu); /* optional */ |
8d2cacbb | 239 | /* |
a4eaf7f1 | 240 | * If ->start_txn() disabled the ->add() schedulability test |
8d2cacbb PZ |
241 | * then ->commit_txn() is required to perform one. On success |
242 | * the transaction is closed. On error the transaction is kept | |
243 | * open until ->cancel_txn() is called. | |
244 | */ | |
e7e7ee2e | 245 | int (*commit_txn) (struct pmu *pmu); /* optional */ |
8d2cacbb | 246 | /* |
a4eaf7f1 | 247 | * Will cancel the transaction, assumes ->del() is called |
25985edc | 248 | * for each successful ->add() during the transaction. |
8d2cacbb | 249 | */ |
e7e7ee2e | 250 | void (*cancel_txn) (struct pmu *pmu); /* optional */ |
35edc2a5 PZ |
251 | |
252 | /* | |
253 | * Will return the value for perf_event_mmap_page::index for this event, | |
254 | * if no implementation is provided it will default to: event->hw.idx + 1. | |
255 | */ | |
256 | int (*event_idx) (struct perf_event *event); /*optional */ | |
d010b332 SE |
257 | |
258 | /* | |
259 | * flush branch stack on context-switches (needed in cpu-wide mode) | |
260 | */ | |
261 | void (*flush_branch_stack) (void); | |
621a01ea IM |
262 | }; |
263 | ||
6a930700 | 264 | /** |
cdd6c482 | 265 | * enum perf_event_active_state - the states of a event |
6a930700 | 266 | */ |
cdd6c482 | 267 | enum perf_event_active_state { |
57c0c15b | 268 | PERF_EVENT_STATE_ERROR = -2, |
cdd6c482 IM |
269 | PERF_EVENT_STATE_OFF = -1, |
270 | PERF_EVENT_STATE_INACTIVE = 0, | |
57c0c15b | 271 | PERF_EVENT_STATE_ACTIVE = 1, |
6a930700 IM |
272 | }; |
273 | ||
9b51f66d | 274 | struct file; |
453f19ee PZ |
275 | struct perf_sample_data; |
276 | ||
a8b0ca17 | 277 | typedef void (*perf_overflow_handler_t)(struct perf_event *, |
b326e956 FW |
278 | struct perf_sample_data *, |
279 | struct pt_regs *regs); | |
280 | ||
d6f962b5 | 281 | enum perf_group_flag { |
e7e7ee2e | 282 | PERF_GROUP_SOFTWARE = 0x1, |
d6f962b5 FW |
283 | }; |
284 | ||
e7e7ee2e IM |
285 | #define SWEVENT_HLIST_BITS 8 |
286 | #define SWEVENT_HLIST_SIZE (1 << SWEVENT_HLIST_BITS) | |
76e1d904 FW |
287 | |
288 | struct swevent_hlist { | |
e7e7ee2e IM |
289 | struct hlist_head heads[SWEVENT_HLIST_SIZE]; |
290 | struct rcu_head rcu_head; | |
76e1d904 FW |
291 | }; |
292 | ||
8a49542c PZ |
293 | #define PERF_ATTACH_CONTEXT 0x01 |
294 | #define PERF_ATTACH_GROUP 0x02 | |
d580ff86 | 295 | #define PERF_ATTACH_TASK 0x04 |
8a49542c | 296 | |
e5d1367f SE |
297 | #ifdef CONFIG_CGROUP_PERF |
298 | /* | |
299 | * perf_cgroup_info keeps track of time_enabled for a cgroup. | |
300 | * This is a per-cpu dynamically allocated data structure. | |
301 | */ | |
302 | struct perf_cgroup_info { | |
e7e7ee2e IM |
303 | u64 time; |
304 | u64 timestamp; | |
e5d1367f SE |
305 | }; |
306 | ||
307 | struct perf_cgroup { | |
e7e7ee2e IM |
308 | struct cgroup_subsys_state css; |
309 | struct perf_cgroup_info *info; /* timing info, one per cpu */ | |
e5d1367f SE |
310 | }; |
311 | #endif | |
312 | ||
76369139 FW |
313 | struct ring_buffer; |
314 | ||
0793a61d | 315 | /** |
cdd6c482 | 316 | * struct perf_event - performance event kernel representation: |
0793a61d | 317 | */ |
cdd6c482 IM |
318 | struct perf_event { |
319 | #ifdef CONFIG_PERF_EVENTS | |
65abc865 | 320 | struct list_head group_entry; |
592903cd | 321 | struct list_head event_entry; |
04289bb9 | 322 | struct list_head sibling_list; |
76e1d904 | 323 | struct hlist_node hlist_entry; |
0127c3ea | 324 | int nr_siblings; |
d6f962b5 | 325 | int group_flags; |
cdd6c482 | 326 | struct perf_event *group_leader; |
a4eaf7f1 | 327 | struct pmu *pmu; |
04289bb9 | 328 | |
cdd6c482 | 329 | enum perf_event_active_state state; |
8a49542c | 330 | unsigned int attach_state; |
e7850595 | 331 | local64_t count; |
a6e6dea6 | 332 | atomic64_t child_count; |
ee06094f | 333 | |
53cfbf59 | 334 | /* |
cdd6c482 | 335 | * These are the total time in nanoseconds that the event |
53cfbf59 | 336 | * has been enabled (i.e. eligible to run, and the task has |
cdd6c482 | 337 | * been scheduled in, if this is a per-task event) |
53cfbf59 PM |
338 | * and running (scheduled onto the CPU), respectively. |
339 | * | |
340 | * They are computed from tstamp_enabled, tstamp_running and | |
cdd6c482 | 341 | * tstamp_stopped when the event is in INACTIVE or ACTIVE state. |
53cfbf59 PM |
342 | */ |
343 | u64 total_time_enabled; | |
344 | u64 total_time_running; | |
345 | ||
346 | /* | |
347 | * These are timestamps used for computing total_time_enabled | |
cdd6c482 | 348 | * and total_time_running when the event is in INACTIVE or |
53cfbf59 PM |
349 | * ACTIVE state, measured in nanoseconds from an arbitrary point |
350 | * in time. | |
cdd6c482 IM |
351 | * tstamp_enabled: the notional time when the event was enabled |
352 | * tstamp_running: the notional time when the event was scheduled on | |
53cfbf59 | 353 | * tstamp_stopped: in INACTIVE state, the notional time when the |
cdd6c482 | 354 | * event was scheduled off. |
53cfbf59 PM |
355 | */ |
356 | u64 tstamp_enabled; | |
357 | u64 tstamp_running; | |
358 | u64 tstamp_stopped; | |
359 | ||
eed01528 SE |
360 | /* |
361 | * timestamp shadows the actual context timing but it can | |
362 | * be safely used in NMI interrupt context. It reflects the | |
363 | * context time as it was when the event was last scheduled in. | |
364 | * | |
365 | * ctx_time already accounts for ctx->timestamp. Therefore to | |
366 | * compute ctx_time for a sample, simply add perf_clock(). | |
367 | */ | |
368 | u64 shadow_ctx_time; | |
369 | ||
24f1e32c | 370 | struct perf_event_attr attr; |
c320c7b7 | 371 | u16 header_size; |
6844c09d | 372 | u16 id_header_size; |
c320c7b7 | 373 | u16 read_size; |
cdd6c482 | 374 | struct hw_perf_event hw; |
0793a61d | 375 | |
cdd6c482 | 376 | struct perf_event_context *ctx; |
a6fa941d | 377 | atomic_long_t refcount; |
0793a61d | 378 | |
53cfbf59 PM |
379 | /* |
380 | * These accumulate total time (in nanoseconds) that children | |
cdd6c482 | 381 | * events have been enabled and running, respectively. |
53cfbf59 PM |
382 | */ |
383 | atomic64_t child_total_time_enabled; | |
384 | atomic64_t child_total_time_running; | |
385 | ||
0793a61d | 386 | /* |
d859e29f | 387 | * Protect attach/detach and child_list: |
0793a61d | 388 | */ |
fccc714b PZ |
389 | struct mutex child_mutex; |
390 | struct list_head child_list; | |
cdd6c482 | 391 | struct perf_event *parent; |
0793a61d TG |
392 | |
393 | int oncpu; | |
394 | int cpu; | |
395 | ||
082ff5a2 PZ |
396 | struct list_head owner_entry; |
397 | struct task_struct *owner; | |
398 | ||
7b732a75 PZ |
399 | /* mmap bits */ |
400 | struct mutex mmap_mutex; | |
401 | atomic_t mmap_count; | |
ac9721f3 PZ |
402 | int mmap_locked; |
403 | struct user_struct *mmap_user; | |
76369139 | 404 | struct ring_buffer *rb; |
10c6db11 | 405 | struct list_head rb_entry; |
37d81828 | 406 | |
7b732a75 | 407 | /* poll related */ |
0793a61d | 408 | wait_queue_head_t waitq; |
3c446b3d | 409 | struct fasync_struct *fasync; |
79f14641 PZ |
410 | |
411 | /* delayed work for NMIs and such */ | |
412 | int pending_wakeup; | |
4c9e2542 | 413 | int pending_kill; |
79f14641 | 414 | int pending_disable; |
e360adbe | 415 | struct irq_work pending; |
592903cd | 416 | |
79f14641 PZ |
417 | atomic_t event_limit; |
418 | ||
cdd6c482 | 419 | void (*destroy)(struct perf_event *); |
592903cd | 420 | struct rcu_head rcu_head; |
709e50cf PZ |
421 | |
422 | struct pid_namespace *ns; | |
8e5799b1 | 423 | u64 id; |
6fb2915d | 424 | |
b326e956 | 425 | perf_overflow_handler_t overflow_handler; |
4dc0da86 | 426 | void *overflow_handler_context; |
453f19ee | 427 | |
07b139c8 | 428 | #ifdef CONFIG_EVENT_TRACING |
1c024eca | 429 | struct ftrace_event_call *tp_event; |
6fb2915d | 430 | struct event_filter *filter; |
ced39002 JO |
431 | #ifdef CONFIG_FUNCTION_TRACER |
432 | struct ftrace_ops ftrace_ops; | |
433 | #endif | |
ee06094f | 434 | #endif |
6fb2915d | 435 | |
e5d1367f SE |
436 | #ifdef CONFIG_CGROUP_PERF |
437 | struct perf_cgroup *cgrp; /* cgroup event is attach to */ | |
438 | int cgrp_defer_enabled; | |
439 | #endif | |
440 | ||
6fb2915d | 441 | #endif /* CONFIG_PERF_EVENTS */ |
0793a61d TG |
442 | }; |
443 | ||
b04243ef PZ |
444 | enum perf_event_context_type { |
445 | task_context, | |
446 | cpu_context, | |
447 | }; | |
448 | ||
0793a61d | 449 | /** |
cdd6c482 | 450 | * struct perf_event_context - event context structure |
0793a61d | 451 | * |
cdd6c482 | 452 | * Used as a container for task events and CPU events as well: |
0793a61d | 453 | */ |
cdd6c482 | 454 | struct perf_event_context { |
108b02cf | 455 | struct pmu *pmu; |
ee643c41 | 456 | enum perf_event_context_type type; |
0793a61d | 457 | /* |
cdd6c482 | 458 | * Protect the states of the events in the list, |
d859e29f | 459 | * nr_active, and the list: |
0793a61d | 460 | */ |
e625cce1 | 461 | raw_spinlock_t lock; |
d859e29f | 462 | /* |
cdd6c482 | 463 | * Protect the list of events. Locking either mutex or lock |
d859e29f PM |
464 | * is sufficient to ensure the list doesn't change; to change |
465 | * the list you need to lock both the mutex and the spinlock. | |
466 | */ | |
a308444c | 467 | struct mutex mutex; |
04289bb9 | 468 | |
889ff015 FW |
469 | struct list_head pinned_groups; |
470 | struct list_head flexible_groups; | |
a308444c | 471 | struct list_head event_list; |
cdd6c482 | 472 | int nr_events; |
a308444c IM |
473 | int nr_active; |
474 | int is_active; | |
bfbd3381 | 475 | int nr_stat; |
0f5a2601 | 476 | int nr_freq; |
dddd3379 | 477 | int rotate_disable; |
a308444c IM |
478 | atomic_t refcount; |
479 | struct task_struct *task; | |
53cfbf59 PM |
480 | |
481 | /* | |
4af4998b | 482 | * Context clock, runs when context enabled. |
53cfbf59 | 483 | */ |
a308444c IM |
484 | u64 time; |
485 | u64 timestamp; | |
564c2b21 PM |
486 | |
487 | /* | |
488 | * These fields let us detect when two contexts have both | |
489 | * been cloned (inherited) from a common ancestor. | |
490 | */ | |
cdd6c482 | 491 | struct perf_event_context *parent_ctx; |
a308444c IM |
492 | u64 parent_gen; |
493 | u64 generation; | |
494 | int pin_count; | |
d010b332 SE |
495 | int nr_cgroups; /* cgroup evts */ |
496 | int nr_branch_stack; /* branch_stack evt */ | |
28009ce4 | 497 | struct rcu_head rcu_head; |
0793a61d TG |
498 | }; |
499 | ||
7ae07ea3 FW |
500 | /* |
501 | * Number of contexts where an event can trigger: | |
e7e7ee2e | 502 | * task, softirq, hardirq, nmi. |
7ae07ea3 FW |
503 | */ |
504 | #define PERF_NR_CONTEXTS 4 | |
505 | ||
0793a61d | 506 | /** |
cdd6c482 | 507 | * struct perf_event_cpu_context - per cpu event context structure |
0793a61d TG |
508 | */ |
509 | struct perf_cpu_context { | |
cdd6c482 IM |
510 | struct perf_event_context ctx; |
511 | struct perf_event_context *task_ctx; | |
0793a61d | 512 | int active_oncpu; |
3b6f9e5c | 513 | int exclusive; |
e9d2b064 PZ |
514 | struct list_head rotation_list; |
515 | int jiffies_interval; | |
3f1f3320 | 516 | struct pmu *unique_pmu; |
e5d1367f | 517 | struct perf_cgroup *cgrp; |
0793a61d TG |
518 | }; |
519 | ||
5622f295 | 520 | struct perf_output_handle { |
57c0c15b | 521 | struct perf_event *event; |
76369139 | 522 | struct ring_buffer *rb; |
6d1acfd5 | 523 | unsigned long wakeup; |
5d967a8b PZ |
524 | unsigned long size; |
525 | void *addr; | |
526 | int page; | |
5622f295 MM |
527 | }; |
528 | ||
cdd6c482 | 529 | #ifdef CONFIG_PERF_EVENTS |
829b42dd | 530 | |
2e80a82a | 531 | extern int perf_pmu_register(struct pmu *pmu, char *name, int type); |
b0a873eb | 532 | extern void perf_pmu_unregister(struct pmu *pmu); |
621a01ea | 533 | |
3bf101ba | 534 | extern int perf_num_counters(void); |
84c79910 | 535 | extern const char *perf_pmu_name(void); |
ab0cce56 JO |
536 | extern void __perf_event_task_sched_in(struct task_struct *prev, |
537 | struct task_struct *task); | |
538 | extern void __perf_event_task_sched_out(struct task_struct *prev, | |
539 | struct task_struct *next); | |
cdd6c482 IM |
540 | extern int perf_event_init_task(struct task_struct *child); |
541 | extern void perf_event_exit_task(struct task_struct *child); | |
542 | extern void perf_event_free_task(struct task_struct *task); | |
4e231c79 | 543 | extern void perf_event_delayed_put(struct task_struct *task); |
cdd6c482 | 544 | extern void perf_event_print_debug(void); |
33696fc0 PZ |
545 | extern void perf_pmu_disable(struct pmu *pmu); |
546 | extern void perf_pmu_enable(struct pmu *pmu); | |
cdd6c482 IM |
547 | extern int perf_event_task_disable(void); |
548 | extern int perf_event_task_enable(void); | |
26ca5c11 | 549 | extern int perf_event_refresh(struct perf_event *event, int refresh); |
cdd6c482 | 550 | extern void perf_event_update_userpage(struct perf_event *event); |
fb0459d7 AV |
551 | extern int perf_event_release_kernel(struct perf_event *event); |
552 | extern struct perf_event * | |
553 | perf_event_create_kernel_counter(struct perf_event_attr *attr, | |
554 | int cpu, | |
38a81da2 | 555 | struct task_struct *task, |
4dc0da86 AK |
556 | perf_overflow_handler_t callback, |
557 | void *context); | |
0cda4c02 YZ |
558 | extern void perf_pmu_migrate_context(struct pmu *pmu, |
559 | int src_cpu, int dst_cpu); | |
59ed446f PZ |
560 | extern u64 perf_event_read_value(struct perf_event *event, |
561 | u64 *enabled, u64 *running); | |
5c92d124 | 562 | |
d010b332 | 563 | |
df1a132b | 564 | struct perf_sample_data { |
5622f295 MM |
565 | u64 type; |
566 | ||
567 | u64 ip; | |
568 | struct { | |
569 | u32 pid; | |
570 | u32 tid; | |
571 | } tid_entry; | |
572 | u64 time; | |
a308444c | 573 | u64 addr; |
5622f295 MM |
574 | u64 id; |
575 | u64 stream_id; | |
576 | struct { | |
577 | u32 cpu; | |
578 | u32 reserved; | |
579 | } cpu_entry; | |
a308444c | 580 | u64 period; |
5622f295 | 581 | struct perf_callchain_entry *callchain; |
3a43ce68 | 582 | struct perf_raw_record *raw; |
bce38cd5 | 583 | struct perf_branch_stack *br_stack; |
4018994f | 584 | struct perf_regs_user regs_user; |
c5ebcedb | 585 | u64 stack_user_size; |
df1a132b PZ |
586 | }; |
587 | ||
fd0d000b RR |
588 | static inline void perf_sample_data_init(struct perf_sample_data *data, |
589 | u64 addr, u64 period) | |
dc1d628a | 590 | { |
fd0d000b | 591 | /* remaining struct members initialized in perf_prepare_sample() */ |
dc1d628a PZ |
592 | data->addr = addr; |
593 | data->raw = NULL; | |
bce38cd5 | 594 | data->br_stack = NULL; |
4018994f JO |
595 | data->period = period; |
596 | data->regs_user.abi = PERF_SAMPLE_REGS_ABI_NONE; | |
597 | data->regs_user.regs = NULL; | |
c5ebcedb | 598 | data->stack_user_size = 0; |
dc1d628a PZ |
599 | } |
600 | ||
5622f295 MM |
601 | extern void perf_output_sample(struct perf_output_handle *handle, |
602 | struct perf_event_header *header, | |
603 | struct perf_sample_data *data, | |
cdd6c482 | 604 | struct perf_event *event); |
5622f295 MM |
605 | extern void perf_prepare_sample(struct perf_event_header *header, |
606 | struct perf_sample_data *data, | |
cdd6c482 | 607 | struct perf_event *event, |
5622f295 MM |
608 | struct pt_regs *regs); |
609 | ||
a8b0ca17 | 610 | extern int perf_event_overflow(struct perf_event *event, |
5622f295 MM |
611 | struct perf_sample_data *data, |
612 | struct pt_regs *regs); | |
df1a132b | 613 | |
6c7e550f FBH |
614 | static inline bool is_sampling_event(struct perf_event *event) |
615 | { | |
616 | return event->attr.sample_period != 0; | |
617 | } | |
618 | ||
3b6f9e5c | 619 | /* |
cdd6c482 | 620 | * Return 1 for a software event, 0 for a hardware event |
3b6f9e5c | 621 | */ |
cdd6c482 | 622 | static inline int is_software_event(struct perf_event *event) |
3b6f9e5c | 623 | { |
89a1e187 | 624 | return event->pmu->task_ctx_nr == perf_sw_context; |
3b6f9e5c PM |
625 | } |
626 | ||
c5905afb | 627 | extern struct static_key perf_swevent_enabled[PERF_COUNT_SW_MAX]; |
f29ac756 | 628 | |
a8b0ca17 | 629 | extern void __perf_sw_event(u32, u64, struct pt_regs *, u64); |
f29ac756 | 630 | |
b0f82b81 | 631 | #ifndef perf_arch_fetch_caller_regs |
e7e7ee2e | 632 | static inline void perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip) { } |
b0f82b81 | 633 | #endif |
5331d7b8 FW |
634 | |
635 | /* | |
636 | * Take a snapshot of the regs. Skip ip and frame pointer to | |
637 | * the nth caller. We only need a few of the regs: | |
638 | * - ip for PERF_SAMPLE_IP | |
639 | * - cs for user_mode() tests | |
640 | * - bp for callchains | |
641 | * - eflags, for future purposes, just in case | |
642 | */ | |
b0f82b81 | 643 | static inline void perf_fetch_caller_regs(struct pt_regs *regs) |
5331d7b8 | 644 | { |
5331d7b8 FW |
645 | memset(regs, 0, sizeof(*regs)); |
646 | ||
b0f82b81 | 647 | perf_arch_fetch_caller_regs(regs, CALLER_ADDR0); |
5331d7b8 FW |
648 | } |
649 | ||
7e54a5a0 | 650 | static __always_inline void |
a8b0ca17 | 651 | perf_sw_event(u32 event_id, u64 nr, struct pt_regs *regs, u64 addr) |
e49a5bd3 | 652 | { |
7e54a5a0 PZ |
653 | struct pt_regs hot_regs; |
654 | ||
c5905afb | 655 | if (static_key_false(&perf_swevent_enabled[event_id])) { |
d430d3d7 JB |
656 | if (!regs) { |
657 | perf_fetch_caller_regs(&hot_regs); | |
658 | regs = &hot_regs; | |
659 | } | |
a8b0ca17 | 660 | __perf_sw_event(event_id, nr, regs, addr); |
e49a5bd3 FW |
661 | } |
662 | } | |
663 | ||
c5905afb | 664 | extern struct static_key_deferred perf_sched_events; |
ee6dcfa4 | 665 | |
ab0cce56 | 666 | static inline void perf_event_task_sched_in(struct task_struct *prev, |
a8d757ef | 667 | struct task_struct *task) |
ab0cce56 JO |
668 | { |
669 | if (static_key_false(&perf_sched_events.key)) | |
670 | __perf_event_task_sched_in(prev, task); | |
671 | } | |
672 | ||
673 | static inline void perf_event_task_sched_out(struct task_struct *prev, | |
674 | struct task_struct *next) | |
ee6dcfa4 | 675 | { |
a8b0ca17 | 676 | perf_sw_event(PERF_COUNT_SW_CONTEXT_SWITCHES, 1, NULL, 0); |
ee6dcfa4 | 677 | |
c5905afb | 678 | if (static_key_false(&perf_sched_events.key)) |
ab0cce56 | 679 | __perf_event_task_sched_out(prev, next); |
ee6dcfa4 PZ |
680 | } |
681 | ||
3af9e859 | 682 | extern void perf_event_mmap(struct vm_area_struct *vma); |
39447b38 | 683 | extern struct perf_guest_info_callbacks *perf_guest_cbs; |
dcf46b94 ZY |
684 | extern int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks); |
685 | extern int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks); | |
39447b38 | 686 | |
cdd6c482 IM |
687 | extern void perf_event_comm(struct task_struct *tsk); |
688 | extern void perf_event_fork(struct task_struct *tsk); | |
8d1b2d93 | 689 | |
56962b44 FW |
690 | /* Callchains */ |
691 | DECLARE_PER_CPU(struct perf_callchain_entry, perf_callchain_entry); | |
692 | ||
e7e7ee2e IM |
693 | extern void perf_callchain_user(struct perf_callchain_entry *entry, struct pt_regs *regs); |
694 | extern void perf_callchain_kernel(struct perf_callchain_entry *entry, struct pt_regs *regs); | |
394ee076 | 695 | |
e7e7ee2e | 696 | static inline void perf_callchain_store(struct perf_callchain_entry *entry, u64 ip) |
70791ce9 FW |
697 | { |
698 | if (entry->nr < PERF_MAX_STACK_DEPTH) | |
699 | entry->ip[entry->nr++] = ip; | |
700 | } | |
394ee076 | 701 | |
cdd6c482 IM |
702 | extern int sysctl_perf_event_paranoid; |
703 | extern int sysctl_perf_event_mlock; | |
704 | extern int sysctl_perf_event_sample_rate; | |
1ccd1549 | 705 | |
163ec435 PZ |
706 | extern int perf_proc_update_handler(struct ctl_table *table, int write, |
707 | void __user *buffer, size_t *lenp, | |
708 | loff_t *ppos); | |
709 | ||
320ebf09 PZ |
710 | static inline bool perf_paranoid_tracepoint_raw(void) |
711 | { | |
712 | return sysctl_perf_event_paranoid > -1; | |
713 | } | |
714 | ||
715 | static inline bool perf_paranoid_cpu(void) | |
716 | { | |
717 | return sysctl_perf_event_paranoid > 0; | |
718 | } | |
719 | ||
720 | static inline bool perf_paranoid_kernel(void) | |
721 | { | |
722 | return sysctl_perf_event_paranoid > 1; | |
723 | } | |
724 | ||
cdd6c482 | 725 | extern void perf_event_init(void); |
1c024eca PZ |
726 | extern void perf_tp_event(u64 addr, u64 count, void *record, |
727 | int entry_size, struct pt_regs *regs, | |
e6dab5ff AV |
728 | struct hlist_head *head, int rctx, |
729 | struct task_struct *task); | |
24f1e32c | 730 | extern void perf_bp_event(struct perf_event *event, void *data); |
0d905bca | 731 | |
9d23a90a | 732 | #ifndef perf_misc_flags |
e7e7ee2e IM |
733 | # define perf_misc_flags(regs) \ |
734 | (user_mode(regs) ? PERF_RECORD_MISC_USER : PERF_RECORD_MISC_KERNEL) | |
735 | # define perf_instruction_pointer(regs) instruction_pointer(regs) | |
9d23a90a PM |
736 | #endif |
737 | ||
bce38cd5 SE |
738 | static inline bool has_branch_stack(struct perf_event *event) |
739 | { | |
740 | return event->attr.sample_type & PERF_SAMPLE_BRANCH_STACK; | |
741 | } | |
742 | ||
5622f295 | 743 | extern int perf_output_begin(struct perf_output_handle *handle, |
a7ac67ea | 744 | struct perf_event *event, unsigned int size); |
5622f295 | 745 | extern void perf_output_end(struct perf_output_handle *handle); |
91d7753a | 746 | extern unsigned int perf_output_copy(struct perf_output_handle *handle, |
5622f295 | 747 | const void *buf, unsigned int len); |
5685e0ff JO |
748 | extern unsigned int perf_output_skip(struct perf_output_handle *handle, |
749 | unsigned int len); | |
4ed7c92d PZ |
750 | extern int perf_swevent_get_recursion_context(void); |
751 | extern void perf_swevent_put_recursion_context(int rctx); | |
44234adc FW |
752 | extern void perf_event_enable(struct perf_event *event); |
753 | extern void perf_event_disable(struct perf_event *event); | |
500ad2d8 | 754 | extern int __perf_event_disable(void *info); |
e9d2b064 | 755 | extern void perf_event_task_tick(void); |
0793a61d TG |
756 | #else |
757 | static inline void | |
ab0cce56 JO |
758 | perf_event_task_sched_in(struct task_struct *prev, |
759 | struct task_struct *task) { } | |
760 | static inline void | |
761 | perf_event_task_sched_out(struct task_struct *prev, | |
762 | struct task_struct *next) { } | |
cdd6c482 IM |
763 | static inline int perf_event_init_task(struct task_struct *child) { return 0; } |
764 | static inline void perf_event_exit_task(struct task_struct *child) { } | |
765 | static inline void perf_event_free_task(struct task_struct *task) { } | |
4e231c79 | 766 | static inline void perf_event_delayed_put(struct task_struct *task) { } |
57c0c15b | 767 | static inline void perf_event_print_debug(void) { } |
57c0c15b IM |
768 | static inline int perf_event_task_disable(void) { return -EINVAL; } |
769 | static inline int perf_event_task_enable(void) { return -EINVAL; } | |
26ca5c11 AK |
770 | static inline int perf_event_refresh(struct perf_event *event, int refresh) |
771 | { | |
772 | return -EINVAL; | |
773 | } | |
15dbf27c | 774 | |
925d519a | 775 | static inline void |
a8b0ca17 | 776 | perf_sw_event(u32 event_id, u64 nr, struct pt_regs *regs, u64 addr) { } |
24f1e32c | 777 | static inline void |
184f412c | 778 | perf_bp_event(struct perf_event *event, void *data) { } |
0a4a9391 | 779 | |
39447b38 | 780 | static inline int perf_register_guest_info_callbacks |
e7e7ee2e | 781 | (struct perf_guest_info_callbacks *callbacks) { return 0; } |
39447b38 | 782 | static inline int perf_unregister_guest_info_callbacks |
e7e7ee2e | 783 | (struct perf_guest_info_callbacks *callbacks) { return 0; } |
39447b38 | 784 | |
57c0c15b | 785 | static inline void perf_event_mmap(struct vm_area_struct *vma) { } |
cdd6c482 IM |
786 | static inline void perf_event_comm(struct task_struct *tsk) { } |
787 | static inline void perf_event_fork(struct task_struct *tsk) { } | |
788 | static inline void perf_event_init(void) { } | |
184f412c | 789 | static inline int perf_swevent_get_recursion_context(void) { return -1; } |
4ed7c92d | 790 | static inline void perf_swevent_put_recursion_context(int rctx) { } |
44234adc FW |
791 | static inline void perf_event_enable(struct perf_event *event) { } |
792 | static inline void perf_event_disable(struct perf_event *event) { } | |
500ad2d8 | 793 | static inline int __perf_event_disable(void *info) { return -1; } |
e9d2b064 | 794 | static inline void perf_event_task_tick(void) { } |
0793a61d TG |
795 | #endif |
796 | ||
e7e7ee2e | 797 | #define perf_output_put(handle, x) perf_output_copy((handle), &(x), sizeof(x)) |
5622f295 | 798 | |
3f6da390 PZ |
799 | /* |
800 | * This has to have a higher priority than migration_notifier in sched.c. | |
801 | */ | |
e7e7ee2e IM |
802 | #define perf_cpu_notifier(fn) \ |
803 | do { \ | |
804 | static struct notifier_block fn##_nb __cpuinitdata = \ | |
805 | { .notifier_call = fn, .priority = CPU_PRI_PERF }; \ | |
c13d38e4 | 806 | unsigned long cpu = smp_processor_id(); \ |
6760bca9 | 807 | unsigned long flags; \ |
e7e7ee2e | 808 | fn(&fn##_nb, (unsigned long)CPU_UP_PREPARE, \ |
c13d38e4 | 809 | (void *)(unsigned long)cpu); \ |
6760bca9 | 810 | local_irq_save(flags); \ |
e7e7ee2e | 811 | fn(&fn##_nb, (unsigned long)CPU_STARTING, \ |
c13d38e4 | 812 | (void *)(unsigned long)cpu); \ |
6760bca9 | 813 | local_irq_restore(flags); \ |
e7e7ee2e | 814 | fn(&fn##_nb, (unsigned long)CPU_ONLINE, \ |
c13d38e4 | 815 | (void *)(unsigned long)cpu); \ |
e7e7ee2e | 816 | register_cpu_notifier(&fn##_nb); \ |
3f6da390 PZ |
817 | } while (0) |
818 | ||
641cc938 JO |
819 | |
820 | #define PMU_FORMAT_ATTR(_name, _format) \ | |
821 | static ssize_t \ | |
822 | _name##_show(struct device *dev, \ | |
823 | struct device_attribute *attr, \ | |
824 | char *page) \ | |
825 | { \ | |
826 | BUILD_BUG_ON(sizeof(_format) >= PAGE_SIZE); \ | |
827 | return sprintf(page, _format "\n"); \ | |
828 | } \ | |
829 | \ | |
830 | static struct device_attribute format_attr_##_name = __ATTR_RO(_name) | |
831 | ||
cdd6c482 | 832 | #endif /* _LINUX_PERF_EVENT_H */ |