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 IM |
23 | #ifdef CONFIG_PERF_EVENTS |
24 | # include <asm/perf_event.h> | |
7be79236 | 25 | # include <asm/local64.h> |
f3dfd265 PM |
26 | #endif |
27 | ||
39447b38 | 28 | struct perf_guest_info_callbacks { |
e7e7ee2e IM |
29 | int (*is_in_guest)(void); |
30 | int (*is_user_mode)(void); | |
31 | unsigned long (*get_guest_ip)(void); | |
39447b38 ZY |
32 | }; |
33 | ||
2ff6cfd7 AB |
34 | #ifdef CONFIG_HAVE_HW_BREAKPOINT |
35 | #include <asm/hw_breakpoint.h> | |
36 | #endif | |
37 | ||
f3dfd265 PM |
38 | #include <linux/list.h> |
39 | #include <linux/mutex.h> | |
40 | #include <linux/rculist.h> | |
41 | #include <linux/rcupdate.h> | |
42 | #include <linux/spinlock.h> | |
d6d020e9 | 43 | #include <linux/hrtimer.h> |
3c446b3d | 44 | #include <linux/fs.h> |
709e50cf | 45 | #include <linux/pid_namespace.h> |
906010b2 | 46 | #include <linux/workqueue.h> |
5331d7b8 | 47 | #include <linux/ftrace.h> |
85cfabbc | 48 | #include <linux/cpu.h> |
e360adbe | 49 | #include <linux/irq_work.h> |
c5905afb | 50 | #include <linux/static_key.h> |
60063497 | 51 | #include <linux/atomic.h> |
641cc938 | 52 | #include <linux/sysfs.h> |
4018994f | 53 | #include <linux/perf_regs.h> |
fa588151 | 54 | #include <asm/local.h> |
f3dfd265 | 55 | |
f9188e02 PZ |
56 | struct perf_callchain_entry { |
57 | __u64 nr; | |
58 | __u64 ip[PERF_MAX_STACK_DEPTH]; | |
59 | }; | |
60 | ||
3a43ce68 FW |
61 | struct perf_raw_record { |
62 | u32 size; | |
63 | void *data; | |
f413cdb8 FW |
64 | }; |
65 | ||
bce38cd5 SE |
66 | /* |
67 | * single taken branch record layout: | |
68 | * | |
69 | * from: source instruction (may not always be a branch insn) | |
70 | * to: branch target | |
71 | * mispred: branch target was mispredicted | |
72 | * predicted: branch target was predicted | |
73 | * | |
74 | * support for mispred, predicted is optional. In case it | |
75 | * is not supported mispred = predicted = 0. | |
76 | */ | |
caff2bef | 77 | struct perf_branch_entry { |
bce38cd5 SE |
78 | __u64 from; |
79 | __u64 to; | |
80 | __u64 mispred:1, /* target mispredicted */ | |
81 | predicted:1,/* target predicted */ | |
82 | reserved:62; | |
caff2bef PZ |
83 | }; |
84 | ||
bce38cd5 SE |
85 | /* |
86 | * branch stack layout: | |
87 | * nr: number of taken branches stored in entries[] | |
88 | * | |
89 | * Note that nr can vary from sample to sample | |
90 | * branches (to, from) are stored from most recent | |
91 | * to least recent, i.e., entries[0] contains the most | |
92 | * recent branch. | |
93 | */ | |
caff2bef PZ |
94 | struct perf_branch_stack { |
95 | __u64 nr; | |
96 | struct perf_branch_entry entries[0]; | |
97 | }; | |
98 | ||
4018994f JO |
99 | struct perf_regs_user { |
100 | __u64 abi; | |
101 | struct pt_regs *regs; | |
102 | }; | |
103 | ||
f3dfd265 PM |
104 | struct task_struct; |
105 | ||
efc9f05d SE |
106 | /* |
107 | * extra PMU register associated with an event | |
108 | */ | |
109 | struct hw_perf_event_extra { | |
110 | u64 config; /* register value */ | |
111 | unsigned int reg; /* register address or index */ | |
112 | int alloc; /* extra register already allocated */ | |
113 | int idx; /* index in shared_regs->regs[] */ | |
114 | }; | |
115 | ||
0793a61d | 116 | /** |
cdd6c482 | 117 | * struct hw_perf_event - performance event hardware details: |
0793a61d | 118 | */ |
cdd6c482 IM |
119 | struct hw_perf_event { |
120 | #ifdef CONFIG_PERF_EVENTS | |
d6d020e9 PZ |
121 | union { |
122 | struct { /* hardware */ | |
a308444c | 123 | u64 config; |
447a194b | 124 | u64 last_tag; |
a308444c | 125 | unsigned long config_base; |
cdd6c482 | 126 | unsigned long event_base; |
c48b6053 | 127 | int event_base_rdpmc; |
a308444c | 128 | int idx; |
447a194b | 129 | int last_cpu; |
9fac2cf3 | 130 | int flags; |
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 | }; |
f22c1bb6 ON |
138 | struct { /* tracepoint */ |
139 | struct task_struct *tp_target; | |
140 | /* for tp_event->class */ | |
141 | struct list_head tp_list; | |
142 | }; | |
24f1e32c | 143 | #ifdef CONFIG_HAVE_HW_BREAKPOINT |
45a73372 | 144 | struct { /* breakpoint */ |
d580ff86 PZ |
145 | /* |
146 | * Crufty hack to avoid the chicken and egg | |
147 | * problem hw_breakpoint has with context | |
148 | * creation and event initalization. | |
149 | */ | |
150 | struct task_struct *bp_target; | |
f22c1bb6 ON |
151 | struct arch_hw_breakpoint info; |
152 | struct list_head bp_list; | |
45a73372 | 153 | }; |
24f1e32c | 154 | #endif |
d6d020e9 | 155 | }; |
a4eaf7f1 | 156 | int state; |
e7850595 | 157 | local64_t prev_count; |
b23f3325 | 158 | u64 sample_period; |
9e350de3 | 159 | u64 last_period; |
e7850595 | 160 | local64_t period_left; |
e050e3f0 | 161 | u64 interrupts_seq; |
60db5e09 | 162 | u64 interrupts; |
6a24ed6c | 163 | |
abd50713 PZ |
164 | u64 freq_time_stamp; |
165 | u64 freq_count_stamp; | |
ee06094f | 166 | #endif |
0793a61d TG |
167 | }; |
168 | ||
a4eaf7f1 PZ |
169 | /* |
170 | * hw_perf_event::state flags | |
171 | */ | |
172 | #define PERF_HES_STOPPED 0x01 /* the counter is stopped */ | |
173 | #define PERF_HES_UPTODATE 0x02 /* event->count up-to-date */ | |
174 | #define PERF_HES_ARCH 0x04 | |
175 | ||
cdd6c482 | 176 | struct perf_event; |
621a01ea | 177 | |
8d2cacbb PZ |
178 | /* |
179 | * Common implementation detail of pmu::{start,commit,cancel}_txn | |
180 | */ | |
181 | #define PERF_EVENT_TXN 0x1 | |
6bde9b6c | 182 | |
621a01ea | 183 | /** |
4aeb0b42 | 184 | * struct pmu - generic performance monitoring unit |
621a01ea | 185 | */ |
4aeb0b42 | 186 | struct pmu { |
b0a873eb PZ |
187 | struct list_head entry; |
188 | ||
abe43400 | 189 | struct device *dev; |
0c9d42ed | 190 | const struct attribute_group **attr_groups; |
2e80a82a PZ |
191 | char *name; |
192 | int type; | |
193 | ||
108b02cf PZ |
194 | int * __percpu pmu_disable_count; |
195 | struct perf_cpu_context * __percpu pmu_cpu_context; | |
8dc85d54 | 196 | int task_ctx_nr; |
6bde9b6c LM |
197 | |
198 | /* | |
a4eaf7f1 PZ |
199 | * Fully disable/enable this PMU, can be used to protect from the PMI |
200 | * as well as for lazy/batch writing of the MSRs. | |
6bde9b6c | 201 | */ |
ad5133b7 PZ |
202 | void (*pmu_enable) (struct pmu *pmu); /* optional */ |
203 | void (*pmu_disable) (struct pmu *pmu); /* optional */ | |
6bde9b6c | 204 | |
8d2cacbb | 205 | /* |
a4eaf7f1 | 206 | * Try and initialize the event for this PMU. |
24cd7f54 | 207 | * Should return -ENOENT when the @event doesn't match this PMU. |
8d2cacbb | 208 | */ |
b0a873eb PZ |
209 | int (*event_init) (struct perf_event *event); |
210 | ||
a4eaf7f1 PZ |
211 | #define PERF_EF_START 0x01 /* start the counter when adding */ |
212 | #define PERF_EF_RELOAD 0x02 /* reload the counter when starting */ | |
213 | #define PERF_EF_UPDATE 0x04 /* update the counter when stopping */ | |
214 | ||
8d2cacbb | 215 | /* |
a4eaf7f1 PZ |
216 | * Adds/Removes a counter to/from the PMU, can be done inside |
217 | * a transaction, see the ->*_txn() methods. | |
218 | */ | |
219 | int (*add) (struct perf_event *event, int flags); | |
220 | void (*del) (struct perf_event *event, int flags); | |
221 | ||
222 | /* | |
223 | * Starts/Stops a counter present on the PMU. The PMI handler | |
224 | * should stop the counter when perf_event_overflow() returns | |
225 | * !0. ->start() will be used to continue. | |
226 | */ | |
227 | void (*start) (struct perf_event *event, int flags); | |
228 | void (*stop) (struct perf_event *event, int flags); | |
229 | ||
230 | /* | |
231 | * Updates the counter value of the event. | |
232 | */ | |
cdd6c482 | 233 | void (*read) (struct perf_event *event); |
6bde9b6c LM |
234 | |
235 | /* | |
24cd7f54 PZ |
236 | * Group events scheduling is treated as a transaction, add |
237 | * group events as a whole and perform one schedulability test. | |
238 | * If the test fails, roll back the whole group | |
a4eaf7f1 PZ |
239 | * |
240 | * Start the transaction, after this ->add() doesn't need to | |
24cd7f54 | 241 | * do schedulability tests. |
8d2cacbb | 242 | */ |
e7e7ee2e | 243 | void (*start_txn) (struct pmu *pmu); /* optional */ |
8d2cacbb | 244 | /* |
a4eaf7f1 | 245 | * If ->start_txn() disabled the ->add() schedulability test |
8d2cacbb PZ |
246 | * then ->commit_txn() is required to perform one. On success |
247 | * the transaction is closed. On error the transaction is kept | |
248 | * open until ->cancel_txn() is called. | |
249 | */ | |
e7e7ee2e | 250 | int (*commit_txn) (struct pmu *pmu); /* optional */ |
8d2cacbb | 251 | /* |
a4eaf7f1 | 252 | * Will cancel the transaction, assumes ->del() is called |
25985edc | 253 | * for each successful ->add() during the transaction. |
8d2cacbb | 254 | */ |
e7e7ee2e | 255 | void (*cancel_txn) (struct pmu *pmu); /* optional */ |
35edc2a5 PZ |
256 | |
257 | /* | |
258 | * Will return the value for perf_event_mmap_page::index for this event, | |
259 | * if no implementation is provided it will default to: event->hw.idx + 1. | |
260 | */ | |
261 | int (*event_idx) (struct perf_event *event); /*optional */ | |
d010b332 SE |
262 | |
263 | /* | |
264 | * flush branch stack on context-switches (needed in cpu-wide mode) | |
265 | */ | |
266 | void (*flush_branch_stack) (void); | |
621a01ea IM |
267 | }; |
268 | ||
6a930700 | 269 | /** |
cdd6c482 | 270 | * enum perf_event_active_state - the states of a event |
6a930700 | 271 | */ |
cdd6c482 | 272 | enum perf_event_active_state { |
57c0c15b | 273 | PERF_EVENT_STATE_ERROR = -2, |
cdd6c482 IM |
274 | PERF_EVENT_STATE_OFF = -1, |
275 | PERF_EVENT_STATE_INACTIVE = 0, | |
57c0c15b | 276 | PERF_EVENT_STATE_ACTIVE = 1, |
6a930700 IM |
277 | }; |
278 | ||
9b51f66d | 279 | struct file; |
453f19ee PZ |
280 | struct perf_sample_data; |
281 | ||
a8b0ca17 | 282 | typedef void (*perf_overflow_handler_t)(struct perf_event *, |
b326e956 FW |
283 | struct perf_sample_data *, |
284 | struct pt_regs *regs); | |
285 | ||
d6f962b5 | 286 | enum perf_group_flag { |
e7e7ee2e | 287 | PERF_GROUP_SOFTWARE = 0x1, |
d6f962b5 FW |
288 | }; |
289 | ||
e7e7ee2e IM |
290 | #define SWEVENT_HLIST_BITS 8 |
291 | #define SWEVENT_HLIST_SIZE (1 << SWEVENT_HLIST_BITS) | |
76e1d904 FW |
292 | |
293 | struct swevent_hlist { | |
e7e7ee2e IM |
294 | struct hlist_head heads[SWEVENT_HLIST_SIZE]; |
295 | struct rcu_head rcu_head; | |
76e1d904 FW |
296 | }; |
297 | ||
8a49542c PZ |
298 | #define PERF_ATTACH_CONTEXT 0x01 |
299 | #define PERF_ATTACH_GROUP 0x02 | |
d580ff86 | 300 | #define PERF_ATTACH_TASK 0x04 |
8a49542c | 301 | |
877c6856 | 302 | struct perf_cgroup; |
76369139 FW |
303 | struct ring_buffer; |
304 | ||
0793a61d | 305 | /** |
cdd6c482 | 306 | * struct perf_event - performance event kernel representation: |
0793a61d | 307 | */ |
cdd6c482 IM |
308 | struct perf_event { |
309 | #ifdef CONFIG_PERF_EVENTS | |
65abc865 | 310 | struct list_head group_entry; |
592903cd | 311 | struct list_head event_entry; |
04289bb9 | 312 | struct list_head sibling_list; |
76e1d904 | 313 | struct hlist_node hlist_entry; |
0127c3ea | 314 | int nr_siblings; |
d6f962b5 | 315 | int group_flags; |
cdd6c482 | 316 | struct perf_event *group_leader; |
a4eaf7f1 | 317 | struct pmu *pmu; |
04289bb9 | 318 | |
cdd6c482 | 319 | enum perf_event_active_state state; |
8a49542c | 320 | unsigned int attach_state; |
e7850595 | 321 | local64_t count; |
a6e6dea6 | 322 | atomic64_t child_count; |
ee06094f | 323 | |
53cfbf59 | 324 | /* |
cdd6c482 | 325 | * These are the total time in nanoseconds that the event |
53cfbf59 | 326 | * has been enabled (i.e. eligible to run, and the task has |
cdd6c482 | 327 | * been scheduled in, if this is a per-task event) |
53cfbf59 PM |
328 | * and running (scheduled onto the CPU), respectively. |
329 | * | |
330 | * They are computed from tstamp_enabled, tstamp_running and | |
cdd6c482 | 331 | * tstamp_stopped when the event is in INACTIVE or ACTIVE state. |
53cfbf59 PM |
332 | */ |
333 | u64 total_time_enabled; | |
334 | u64 total_time_running; | |
335 | ||
336 | /* | |
337 | * These are timestamps used for computing total_time_enabled | |
cdd6c482 | 338 | * and total_time_running when the event is in INACTIVE or |
53cfbf59 PM |
339 | * ACTIVE state, measured in nanoseconds from an arbitrary point |
340 | * in time. | |
cdd6c482 IM |
341 | * tstamp_enabled: the notional time when the event was enabled |
342 | * tstamp_running: the notional time when the event was scheduled on | |
53cfbf59 | 343 | * tstamp_stopped: in INACTIVE state, the notional time when the |
cdd6c482 | 344 | * event was scheduled off. |
53cfbf59 PM |
345 | */ |
346 | u64 tstamp_enabled; | |
347 | u64 tstamp_running; | |
348 | u64 tstamp_stopped; | |
349 | ||
eed01528 SE |
350 | /* |
351 | * timestamp shadows the actual context timing but it can | |
352 | * be safely used in NMI interrupt context. It reflects the | |
353 | * context time as it was when the event was last scheduled in. | |
354 | * | |
355 | * ctx_time already accounts for ctx->timestamp. Therefore to | |
356 | * compute ctx_time for a sample, simply add perf_clock(). | |
357 | */ | |
358 | u64 shadow_ctx_time; | |
359 | ||
24f1e32c | 360 | struct perf_event_attr attr; |
c320c7b7 | 361 | u16 header_size; |
6844c09d | 362 | u16 id_header_size; |
c320c7b7 | 363 | u16 read_size; |
cdd6c482 | 364 | struct hw_perf_event hw; |
0793a61d | 365 | |
cdd6c482 | 366 | struct perf_event_context *ctx; |
a6fa941d | 367 | atomic_long_t refcount; |
0793a61d | 368 | |
53cfbf59 PM |
369 | /* |
370 | * These accumulate total time (in nanoseconds) that children | |
cdd6c482 | 371 | * events have been enabled and running, respectively. |
53cfbf59 PM |
372 | */ |
373 | atomic64_t child_total_time_enabled; | |
374 | atomic64_t child_total_time_running; | |
375 | ||
0793a61d | 376 | /* |
d859e29f | 377 | * Protect attach/detach and child_list: |
0793a61d | 378 | */ |
fccc714b PZ |
379 | struct mutex child_mutex; |
380 | struct list_head child_list; | |
cdd6c482 | 381 | struct perf_event *parent; |
0793a61d TG |
382 | |
383 | int oncpu; | |
384 | int cpu; | |
385 | ||
082ff5a2 PZ |
386 | struct list_head owner_entry; |
387 | struct task_struct *owner; | |
388 | ||
7b732a75 PZ |
389 | /* mmap bits */ |
390 | struct mutex mmap_mutex; | |
391 | atomic_t mmap_count; | |
ac9721f3 PZ |
392 | int mmap_locked; |
393 | struct user_struct *mmap_user; | |
76369139 | 394 | struct ring_buffer *rb; |
10c6db11 | 395 | struct list_head rb_entry; |
37d81828 | 396 | |
7b732a75 | 397 | /* poll related */ |
0793a61d | 398 | wait_queue_head_t waitq; |
3c446b3d | 399 | struct fasync_struct *fasync; |
79f14641 PZ |
400 | |
401 | /* delayed work for NMIs and such */ | |
402 | int pending_wakeup; | |
4c9e2542 | 403 | int pending_kill; |
79f14641 | 404 | int pending_disable; |
e360adbe | 405 | struct irq_work pending; |
592903cd | 406 | |
79f14641 PZ |
407 | atomic_t event_limit; |
408 | ||
cdd6c482 | 409 | void (*destroy)(struct perf_event *); |
592903cd | 410 | struct rcu_head rcu_head; |
709e50cf PZ |
411 | |
412 | struct pid_namespace *ns; | |
8e5799b1 | 413 | u64 id; |
6fb2915d | 414 | |
b326e956 | 415 | perf_overflow_handler_t overflow_handler; |
4dc0da86 | 416 | void *overflow_handler_context; |
453f19ee | 417 | |
07b139c8 | 418 | #ifdef CONFIG_EVENT_TRACING |
1c024eca | 419 | struct ftrace_event_call *tp_event; |
6fb2915d | 420 | struct event_filter *filter; |
ced39002 JO |
421 | #ifdef CONFIG_FUNCTION_TRACER |
422 | struct ftrace_ops ftrace_ops; | |
423 | #endif | |
ee06094f | 424 | #endif |
6fb2915d | 425 | |
e5d1367f SE |
426 | #ifdef CONFIG_CGROUP_PERF |
427 | struct perf_cgroup *cgrp; /* cgroup event is attach to */ | |
428 | int cgrp_defer_enabled; | |
429 | #endif | |
430 | ||
6fb2915d | 431 | #endif /* CONFIG_PERF_EVENTS */ |
0793a61d TG |
432 | }; |
433 | ||
b04243ef PZ |
434 | enum perf_event_context_type { |
435 | task_context, | |
436 | cpu_context, | |
437 | }; | |
438 | ||
0793a61d | 439 | /** |
cdd6c482 | 440 | * struct perf_event_context - event context structure |
0793a61d | 441 | * |
cdd6c482 | 442 | * Used as a container for task events and CPU events as well: |
0793a61d | 443 | */ |
cdd6c482 | 444 | struct perf_event_context { |
108b02cf | 445 | struct pmu *pmu; |
ee643c41 | 446 | enum perf_event_context_type type; |
0793a61d | 447 | /* |
cdd6c482 | 448 | * Protect the states of the events in the list, |
d859e29f | 449 | * nr_active, and the list: |
0793a61d | 450 | */ |
e625cce1 | 451 | raw_spinlock_t lock; |
d859e29f | 452 | /* |
cdd6c482 | 453 | * Protect the list of events. Locking either mutex or lock |
d859e29f PM |
454 | * is sufficient to ensure the list doesn't change; to change |
455 | * the list you need to lock both the mutex and the spinlock. | |
456 | */ | |
a308444c | 457 | struct mutex mutex; |
04289bb9 | 458 | |
889ff015 FW |
459 | struct list_head pinned_groups; |
460 | struct list_head flexible_groups; | |
a308444c | 461 | struct list_head event_list; |
cdd6c482 | 462 | int nr_events; |
a308444c IM |
463 | int nr_active; |
464 | int is_active; | |
bfbd3381 | 465 | int nr_stat; |
0f5a2601 | 466 | int nr_freq; |
dddd3379 | 467 | int rotate_disable; |
a308444c IM |
468 | atomic_t refcount; |
469 | struct task_struct *task; | |
53cfbf59 PM |
470 | |
471 | /* | |
4af4998b | 472 | * Context clock, runs when context enabled. |
53cfbf59 | 473 | */ |
a308444c IM |
474 | u64 time; |
475 | u64 timestamp; | |
564c2b21 PM |
476 | |
477 | /* | |
478 | * These fields let us detect when two contexts have both | |
479 | * been cloned (inherited) from a common ancestor. | |
480 | */ | |
cdd6c482 | 481 | struct perf_event_context *parent_ctx; |
a308444c IM |
482 | u64 parent_gen; |
483 | u64 generation; | |
484 | int pin_count; | |
d010b332 SE |
485 | int nr_cgroups; /* cgroup evts */ |
486 | int nr_branch_stack; /* branch_stack evt */ | |
28009ce4 | 487 | struct rcu_head rcu_head; |
0793a61d TG |
488 | }; |
489 | ||
7ae07ea3 FW |
490 | /* |
491 | * Number of contexts where an event can trigger: | |
e7e7ee2e | 492 | * task, softirq, hardirq, nmi. |
7ae07ea3 FW |
493 | */ |
494 | #define PERF_NR_CONTEXTS 4 | |
495 | ||
0793a61d | 496 | /** |
cdd6c482 | 497 | * struct perf_event_cpu_context - per cpu event context structure |
0793a61d TG |
498 | */ |
499 | struct perf_cpu_context { | |
cdd6c482 IM |
500 | struct perf_event_context ctx; |
501 | struct perf_event_context *task_ctx; | |
0793a61d | 502 | int active_oncpu; |
3b6f9e5c | 503 | int exclusive; |
e9d2b064 PZ |
504 | struct list_head rotation_list; |
505 | int jiffies_interval; | |
3f1f3320 | 506 | struct pmu *unique_pmu; |
e5d1367f | 507 | struct perf_cgroup *cgrp; |
0793a61d TG |
508 | }; |
509 | ||
5622f295 | 510 | struct perf_output_handle { |
57c0c15b | 511 | struct perf_event *event; |
76369139 | 512 | struct ring_buffer *rb; |
6d1acfd5 | 513 | unsigned long wakeup; |
5d967a8b PZ |
514 | unsigned long size; |
515 | void *addr; | |
516 | int page; | |
5622f295 MM |
517 | }; |
518 | ||
cdd6c482 | 519 | #ifdef CONFIG_PERF_EVENTS |
829b42dd | 520 | |
2e80a82a | 521 | extern int perf_pmu_register(struct pmu *pmu, char *name, int type); |
b0a873eb | 522 | extern void perf_pmu_unregister(struct pmu *pmu); |
621a01ea | 523 | |
3bf101ba | 524 | extern int perf_num_counters(void); |
84c79910 | 525 | extern const char *perf_pmu_name(void); |
ab0cce56 JO |
526 | extern void __perf_event_task_sched_in(struct task_struct *prev, |
527 | struct task_struct *task); | |
528 | extern void __perf_event_task_sched_out(struct task_struct *prev, | |
529 | struct task_struct *next); | |
cdd6c482 IM |
530 | extern int perf_event_init_task(struct task_struct *child); |
531 | extern void perf_event_exit_task(struct task_struct *child); | |
532 | extern void perf_event_free_task(struct task_struct *task); | |
4e231c79 | 533 | extern void perf_event_delayed_put(struct task_struct *task); |
cdd6c482 | 534 | extern void perf_event_print_debug(void); |
33696fc0 PZ |
535 | extern void perf_pmu_disable(struct pmu *pmu); |
536 | extern void perf_pmu_enable(struct pmu *pmu); | |
cdd6c482 IM |
537 | extern int perf_event_task_disable(void); |
538 | extern int perf_event_task_enable(void); | |
26ca5c11 | 539 | extern int perf_event_refresh(struct perf_event *event, int refresh); |
cdd6c482 | 540 | extern void perf_event_update_userpage(struct perf_event *event); |
fb0459d7 AV |
541 | extern int perf_event_release_kernel(struct perf_event *event); |
542 | extern struct perf_event * | |
543 | perf_event_create_kernel_counter(struct perf_event_attr *attr, | |
544 | int cpu, | |
38a81da2 | 545 | struct task_struct *task, |
4dc0da86 AK |
546 | perf_overflow_handler_t callback, |
547 | void *context); | |
0cda4c02 YZ |
548 | extern void perf_pmu_migrate_context(struct pmu *pmu, |
549 | int src_cpu, int dst_cpu); | |
59ed446f PZ |
550 | extern u64 perf_event_read_value(struct perf_event *event, |
551 | u64 *enabled, u64 *running); | |
5c92d124 | 552 | |
d010b332 | 553 | |
df1a132b | 554 | struct perf_sample_data { |
5622f295 MM |
555 | u64 type; |
556 | ||
557 | u64 ip; | |
558 | struct { | |
559 | u32 pid; | |
560 | u32 tid; | |
561 | } tid_entry; | |
562 | u64 time; | |
a308444c | 563 | u64 addr; |
5622f295 MM |
564 | u64 id; |
565 | u64 stream_id; | |
566 | struct { | |
567 | u32 cpu; | |
568 | u32 reserved; | |
569 | } cpu_entry; | |
a308444c | 570 | u64 period; |
5622f295 | 571 | struct perf_callchain_entry *callchain; |
3a43ce68 | 572 | struct perf_raw_record *raw; |
bce38cd5 | 573 | struct perf_branch_stack *br_stack; |
4018994f | 574 | struct perf_regs_user regs_user; |
c5ebcedb | 575 | u64 stack_user_size; |
df1a132b PZ |
576 | }; |
577 | ||
fd0d000b RR |
578 | static inline void perf_sample_data_init(struct perf_sample_data *data, |
579 | u64 addr, u64 period) | |
dc1d628a | 580 | { |
fd0d000b | 581 | /* remaining struct members initialized in perf_prepare_sample() */ |
dc1d628a PZ |
582 | data->addr = addr; |
583 | data->raw = NULL; | |
bce38cd5 | 584 | data->br_stack = NULL; |
4018994f JO |
585 | data->period = period; |
586 | data->regs_user.abi = PERF_SAMPLE_REGS_ABI_NONE; | |
587 | data->regs_user.regs = NULL; | |
c5ebcedb | 588 | data->stack_user_size = 0; |
dc1d628a PZ |
589 | } |
590 | ||
5622f295 MM |
591 | extern void perf_output_sample(struct perf_output_handle *handle, |
592 | struct perf_event_header *header, | |
593 | struct perf_sample_data *data, | |
cdd6c482 | 594 | struct perf_event *event); |
5622f295 MM |
595 | extern void perf_prepare_sample(struct perf_event_header *header, |
596 | struct perf_sample_data *data, | |
cdd6c482 | 597 | struct perf_event *event, |
5622f295 MM |
598 | struct pt_regs *regs); |
599 | ||
a8b0ca17 | 600 | extern int perf_event_overflow(struct perf_event *event, |
5622f295 MM |
601 | struct perf_sample_data *data, |
602 | struct pt_regs *regs); | |
df1a132b | 603 | |
6c7e550f FBH |
604 | static inline bool is_sampling_event(struct perf_event *event) |
605 | { | |
606 | return event->attr.sample_period != 0; | |
607 | } | |
608 | ||
3b6f9e5c | 609 | /* |
cdd6c482 | 610 | * Return 1 for a software event, 0 for a hardware event |
3b6f9e5c | 611 | */ |
cdd6c482 | 612 | static inline int is_software_event(struct perf_event *event) |
3b6f9e5c | 613 | { |
89a1e187 | 614 | return event->pmu->task_ctx_nr == perf_sw_context; |
3b6f9e5c PM |
615 | } |
616 | ||
c5905afb | 617 | extern struct static_key perf_swevent_enabled[PERF_COUNT_SW_MAX]; |
f29ac756 | 618 | |
a8b0ca17 | 619 | extern void __perf_sw_event(u32, u64, struct pt_regs *, u64); |
f29ac756 | 620 | |
b0f82b81 | 621 | #ifndef perf_arch_fetch_caller_regs |
e7e7ee2e | 622 | static inline void perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip) { } |
b0f82b81 | 623 | #endif |
5331d7b8 FW |
624 | |
625 | /* | |
626 | * Take a snapshot of the regs. Skip ip and frame pointer to | |
627 | * the nth caller. We only need a few of the regs: | |
628 | * - ip for PERF_SAMPLE_IP | |
629 | * - cs for user_mode() tests | |
630 | * - bp for callchains | |
631 | * - eflags, for future purposes, just in case | |
632 | */ | |
b0f82b81 | 633 | static inline void perf_fetch_caller_regs(struct pt_regs *regs) |
5331d7b8 | 634 | { |
5331d7b8 FW |
635 | memset(regs, 0, sizeof(*regs)); |
636 | ||
b0f82b81 | 637 | perf_arch_fetch_caller_regs(regs, CALLER_ADDR0); |
5331d7b8 FW |
638 | } |
639 | ||
7e54a5a0 | 640 | static __always_inline void |
a8b0ca17 | 641 | perf_sw_event(u32 event_id, u64 nr, struct pt_regs *regs, u64 addr) |
e49a5bd3 | 642 | { |
7e54a5a0 PZ |
643 | struct pt_regs hot_regs; |
644 | ||
c5905afb | 645 | if (static_key_false(&perf_swevent_enabled[event_id])) { |
d430d3d7 JB |
646 | if (!regs) { |
647 | perf_fetch_caller_regs(&hot_regs); | |
648 | regs = &hot_regs; | |
649 | } | |
a8b0ca17 | 650 | __perf_sw_event(event_id, nr, regs, addr); |
e49a5bd3 FW |
651 | } |
652 | } | |
653 | ||
c5905afb | 654 | extern struct static_key_deferred perf_sched_events; |
ee6dcfa4 | 655 | |
ab0cce56 | 656 | static inline void perf_event_task_sched_in(struct task_struct *prev, |
a8d757ef | 657 | struct task_struct *task) |
ab0cce56 JO |
658 | { |
659 | if (static_key_false(&perf_sched_events.key)) | |
660 | __perf_event_task_sched_in(prev, task); | |
661 | } | |
662 | ||
663 | static inline void perf_event_task_sched_out(struct task_struct *prev, | |
664 | struct task_struct *next) | |
ee6dcfa4 | 665 | { |
a8b0ca17 | 666 | perf_sw_event(PERF_COUNT_SW_CONTEXT_SWITCHES, 1, NULL, 0); |
ee6dcfa4 | 667 | |
c5905afb | 668 | if (static_key_false(&perf_sched_events.key)) |
ab0cce56 | 669 | __perf_event_task_sched_out(prev, next); |
ee6dcfa4 PZ |
670 | } |
671 | ||
3af9e859 | 672 | extern void perf_event_mmap(struct vm_area_struct *vma); |
39447b38 | 673 | extern struct perf_guest_info_callbacks *perf_guest_cbs; |
dcf46b94 ZY |
674 | extern int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks); |
675 | extern int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks); | |
39447b38 | 676 | |
cdd6c482 IM |
677 | extern void perf_event_comm(struct task_struct *tsk); |
678 | extern void perf_event_fork(struct task_struct *tsk); | |
8d1b2d93 | 679 | |
56962b44 FW |
680 | /* Callchains */ |
681 | DECLARE_PER_CPU(struct perf_callchain_entry, perf_callchain_entry); | |
682 | ||
e7e7ee2e IM |
683 | extern void perf_callchain_user(struct perf_callchain_entry *entry, struct pt_regs *regs); |
684 | extern void perf_callchain_kernel(struct perf_callchain_entry *entry, struct pt_regs *regs); | |
394ee076 | 685 | |
e7e7ee2e | 686 | static inline void perf_callchain_store(struct perf_callchain_entry *entry, u64 ip) |
70791ce9 FW |
687 | { |
688 | if (entry->nr < PERF_MAX_STACK_DEPTH) | |
689 | entry->ip[entry->nr++] = ip; | |
690 | } | |
394ee076 | 691 | |
cdd6c482 IM |
692 | extern int sysctl_perf_event_paranoid; |
693 | extern int sysctl_perf_event_mlock; | |
694 | extern int sysctl_perf_event_sample_rate; | |
1ccd1549 | 695 | |
163ec435 PZ |
696 | extern int perf_proc_update_handler(struct ctl_table *table, int write, |
697 | void __user *buffer, size_t *lenp, | |
698 | loff_t *ppos); | |
699 | ||
320ebf09 PZ |
700 | static inline bool perf_paranoid_tracepoint_raw(void) |
701 | { | |
702 | return sysctl_perf_event_paranoid > -1; | |
703 | } | |
704 | ||
705 | static inline bool perf_paranoid_cpu(void) | |
706 | { | |
707 | return sysctl_perf_event_paranoid > 0; | |
708 | } | |
709 | ||
710 | static inline bool perf_paranoid_kernel(void) | |
711 | { | |
712 | return sysctl_perf_event_paranoid > 1; | |
713 | } | |
714 | ||
cdd6c482 | 715 | extern void perf_event_init(void); |
1c024eca PZ |
716 | extern void perf_tp_event(u64 addr, u64 count, void *record, |
717 | int entry_size, struct pt_regs *regs, | |
e6dab5ff AV |
718 | struct hlist_head *head, int rctx, |
719 | struct task_struct *task); | |
24f1e32c | 720 | extern void perf_bp_event(struct perf_event *event, void *data); |
0d905bca | 721 | |
9d23a90a | 722 | #ifndef perf_misc_flags |
e7e7ee2e IM |
723 | # define perf_misc_flags(regs) \ |
724 | (user_mode(regs) ? PERF_RECORD_MISC_USER : PERF_RECORD_MISC_KERNEL) | |
725 | # define perf_instruction_pointer(regs) instruction_pointer(regs) | |
9d23a90a PM |
726 | #endif |
727 | ||
bce38cd5 SE |
728 | static inline bool has_branch_stack(struct perf_event *event) |
729 | { | |
730 | return event->attr.sample_type & PERF_SAMPLE_BRANCH_STACK; | |
731 | } | |
732 | ||
5622f295 | 733 | extern int perf_output_begin(struct perf_output_handle *handle, |
a7ac67ea | 734 | struct perf_event *event, unsigned int size); |
5622f295 | 735 | extern void perf_output_end(struct perf_output_handle *handle); |
91d7753a | 736 | extern unsigned int perf_output_copy(struct perf_output_handle *handle, |
5622f295 | 737 | const void *buf, unsigned int len); |
5685e0ff JO |
738 | extern unsigned int perf_output_skip(struct perf_output_handle *handle, |
739 | unsigned int len); | |
4ed7c92d PZ |
740 | extern int perf_swevent_get_recursion_context(void); |
741 | extern void perf_swevent_put_recursion_context(int rctx); | |
44234adc FW |
742 | extern void perf_event_enable(struct perf_event *event); |
743 | extern void perf_event_disable(struct perf_event *event); | |
500ad2d8 | 744 | extern int __perf_event_disable(void *info); |
e9d2b064 | 745 | extern void perf_event_task_tick(void); |
0793a61d TG |
746 | #else |
747 | static inline void | |
ab0cce56 JO |
748 | perf_event_task_sched_in(struct task_struct *prev, |
749 | struct task_struct *task) { } | |
750 | static inline void | |
751 | perf_event_task_sched_out(struct task_struct *prev, | |
752 | struct task_struct *next) { } | |
cdd6c482 IM |
753 | static inline int perf_event_init_task(struct task_struct *child) { return 0; } |
754 | static inline void perf_event_exit_task(struct task_struct *child) { } | |
755 | static inline void perf_event_free_task(struct task_struct *task) { } | |
4e231c79 | 756 | static inline void perf_event_delayed_put(struct task_struct *task) { } |
57c0c15b | 757 | static inline void perf_event_print_debug(void) { } |
57c0c15b IM |
758 | static inline int perf_event_task_disable(void) { return -EINVAL; } |
759 | static inline int perf_event_task_enable(void) { return -EINVAL; } | |
26ca5c11 AK |
760 | static inline int perf_event_refresh(struct perf_event *event, int refresh) |
761 | { | |
762 | return -EINVAL; | |
763 | } | |
15dbf27c | 764 | |
925d519a | 765 | static inline void |
a8b0ca17 | 766 | perf_sw_event(u32 event_id, u64 nr, struct pt_regs *regs, u64 addr) { } |
24f1e32c | 767 | static inline void |
184f412c | 768 | perf_bp_event(struct perf_event *event, void *data) { } |
0a4a9391 | 769 | |
39447b38 | 770 | static inline int perf_register_guest_info_callbacks |
e7e7ee2e | 771 | (struct perf_guest_info_callbacks *callbacks) { return 0; } |
39447b38 | 772 | static inline int perf_unregister_guest_info_callbacks |
e7e7ee2e | 773 | (struct perf_guest_info_callbacks *callbacks) { return 0; } |
39447b38 | 774 | |
57c0c15b | 775 | static inline void perf_event_mmap(struct vm_area_struct *vma) { } |
cdd6c482 IM |
776 | static inline void perf_event_comm(struct task_struct *tsk) { } |
777 | static inline void perf_event_fork(struct task_struct *tsk) { } | |
778 | static inline void perf_event_init(void) { } | |
184f412c | 779 | static inline int perf_swevent_get_recursion_context(void) { return -1; } |
4ed7c92d | 780 | static inline void perf_swevent_put_recursion_context(int rctx) { } |
44234adc FW |
781 | static inline void perf_event_enable(struct perf_event *event) { } |
782 | static inline void perf_event_disable(struct perf_event *event) { } | |
500ad2d8 | 783 | static inline int __perf_event_disable(void *info) { return -1; } |
e9d2b064 | 784 | static inline void perf_event_task_tick(void) { } |
0793a61d TG |
785 | #endif |
786 | ||
e7e7ee2e | 787 | #define perf_output_put(handle, x) perf_output_copy((handle), &(x), sizeof(x)) |
5622f295 | 788 | |
3f6da390 PZ |
789 | /* |
790 | * This has to have a higher priority than migration_notifier in sched.c. | |
791 | */ | |
e7e7ee2e IM |
792 | #define perf_cpu_notifier(fn) \ |
793 | do { \ | |
794 | static struct notifier_block fn##_nb __cpuinitdata = \ | |
795 | { .notifier_call = fn, .priority = CPU_PRI_PERF }; \ | |
c13d38e4 | 796 | unsigned long cpu = smp_processor_id(); \ |
6760bca9 | 797 | unsigned long flags; \ |
e7e7ee2e | 798 | fn(&fn##_nb, (unsigned long)CPU_UP_PREPARE, \ |
c13d38e4 | 799 | (void *)(unsigned long)cpu); \ |
6760bca9 | 800 | local_irq_save(flags); \ |
e7e7ee2e | 801 | fn(&fn##_nb, (unsigned long)CPU_STARTING, \ |
c13d38e4 | 802 | (void *)(unsigned long)cpu); \ |
6760bca9 | 803 | local_irq_restore(flags); \ |
e7e7ee2e | 804 | fn(&fn##_nb, (unsigned long)CPU_ONLINE, \ |
c13d38e4 | 805 | (void *)(unsigned long)cpu); \ |
e7e7ee2e | 806 | register_cpu_notifier(&fn##_nb); \ |
3f6da390 PZ |
807 | } while (0) |
808 | ||
641cc938 | 809 | |
2663960c SB |
810 | struct perf_pmu_events_attr { |
811 | struct device_attribute attr; | |
812 | u64 id; | |
3a54aaa0 | 813 | const char *event_str; |
2663960c SB |
814 | }; |
815 | ||
816 | #define PMU_EVENT_ATTR(_name, _var, _id, _show) \ | |
817 | static struct perf_pmu_events_attr _var = { \ | |
818 | .attr = __ATTR(_name, 0444, _show, NULL), \ | |
819 | .id = _id, \ | |
820 | }; | |
821 | ||
641cc938 JO |
822 | #define PMU_FORMAT_ATTR(_name, _format) \ |
823 | static ssize_t \ | |
824 | _name##_show(struct device *dev, \ | |
825 | struct device_attribute *attr, \ | |
826 | char *page) \ | |
827 | { \ | |
828 | BUILD_BUG_ON(sizeof(_format) >= PAGE_SIZE); \ | |
829 | return sprintf(page, _format "\n"); \ | |
830 | } \ | |
831 | \ | |
832 | static struct device_attribute format_attr_##_name = __ATTR_RO(_name) | |
833 | ||
cdd6c482 | 834 | #endif /* _LINUX_PERF_EVENT_H */ |