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> |
851cf6e7 | 51 | #include <linux/jump_label_ratelimit.h> |
60063497 | 52 | #include <linux/atomic.h> |
641cc938 | 53 | #include <linux/sysfs.h> |
4018994f | 54 | #include <linux/perf_regs.h> |
fadfe7be | 55 | #include <linux/workqueue.h> |
39bed6cb | 56 | #include <linux/cgroup.h> |
fa588151 | 57 | #include <asm/local.h> |
f3dfd265 | 58 | |
f9188e02 PZ |
59 | struct perf_callchain_entry { |
60 | __u64 nr; | |
61 | __u64 ip[PERF_MAX_STACK_DEPTH]; | |
62 | }; | |
63 | ||
3a43ce68 FW |
64 | struct perf_raw_record { |
65 | u32 size; | |
66 | void *data; | |
f413cdb8 FW |
67 | }; |
68 | ||
bce38cd5 SE |
69 | /* |
70 | * branch stack layout: | |
71 | * nr: number of taken branches stored in entries[] | |
72 | * | |
73 | * Note that nr can vary from sample to sample | |
74 | * branches (to, from) are stored from most recent | |
75 | * to least recent, i.e., entries[0] contains the most | |
76 | * recent branch. | |
77 | */ | |
caff2bef PZ |
78 | struct perf_branch_stack { |
79 | __u64 nr; | |
80 | struct perf_branch_entry entries[0]; | |
81 | }; | |
82 | ||
f3dfd265 PM |
83 | struct task_struct; |
84 | ||
efc9f05d SE |
85 | /* |
86 | * extra PMU register associated with an event | |
87 | */ | |
88 | struct hw_perf_event_extra { | |
89 | u64 config; /* register value */ | |
90 | unsigned int reg; /* register address or index */ | |
91 | int alloc; /* extra register already allocated */ | |
92 | int idx; /* index in shared_regs->regs[] */ | |
93 | }; | |
94 | ||
0793a61d | 95 | /** |
cdd6c482 | 96 | * struct hw_perf_event - performance event hardware details: |
0793a61d | 97 | */ |
cdd6c482 IM |
98 | struct hw_perf_event { |
99 | #ifdef CONFIG_PERF_EVENTS | |
d6d020e9 PZ |
100 | union { |
101 | struct { /* hardware */ | |
a308444c | 102 | u64 config; |
447a194b | 103 | u64 last_tag; |
a308444c | 104 | unsigned long config_base; |
cdd6c482 | 105 | unsigned long event_base; |
c48b6053 | 106 | int event_base_rdpmc; |
a308444c | 107 | int idx; |
447a194b | 108 | int last_cpu; |
9fac2cf3 | 109 | int flags; |
bce38cd5 | 110 | |
efc9f05d | 111 | struct hw_perf_event_extra extra_reg; |
bce38cd5 | 112 | struct hw_perf_event_extra branch_reg; |
d6d020e9 | 113 | }; |
721a669b | 114 | struct { /* software */ |
a308444c | 115 | struct hrtimer hrtimer; |
d6d020e9 | 116 | }; |
f22c1bb6 | 117 | struct { /* tracepoint */ |
f22c1bb6 ON |
118 | /* for tp_event->class */ |
119 | struct list_head tp_list; | |
120 | }; | |
4afbb24c MF |
121 | struct { /* intel_cqm */ |
122 | int cqm_state; | |
b3df4ec4 | 123 | u32 cqm_rmid; |
4afbb24c MF |
124 | struct list_head cqm_events_entry; |
125 | struct list_head cqm_groups_entry; | |
126 | struct list_head cqm_group_entry; | |
127 | }; | |
ec0d7729 AS |
128 | struct { /* itrace */ |
129 | int itrace_started; | |
130 | }; | |
24f1e32c | 131 | #ifdef CONFIG_HAVE_HW_BREAKPOINT |
45a73372 | 132 | struct { /* breakpoint */ |
d580ff86 PZ |
133 | /* |
134 | * Crufty hack to avoid the chicken and egg | |
135 | * problem hw_breakpoint has with context | |
136 | * creation and event initalization. | |
137 | */ | |
f22c1bb6 ON |
138 | struct arch_hw_breakpoint info; |
139 | struct list_head bp_list; | |
45a73372 | 140 | }; |
24f1e32c | 141 | #endif |
d6d020e9 | 142 | }; |
50f16a8b | 143 | struct task_struct *target; |
a4eaf7f1 | 144 | int state; |
e7850595 | 145 | local64_t prev_count; |
b23f3325 | 146 | u64 sample_period; |
9e350de3 | 147 | u64 last_period; |
e7850595 | 148 | local64_t period_left; |
e050e3f0 | 149 | u64 interrupts_seq; |
60db5e09 | 150 | u64 interrupts; |
6a24ed6c | 151 | |
abd50713 PZ |
152 | u64 freq_time_stamp; |
153 | u64 freq_count_stamp; | |
ee06094f | 154 | #endif |
0793a61d TG |
155 | }; |
156 | ||
a4eaf7f1 PZ |
157 | /* |
158 | * hw_perf_event::state flags | |
159 | */ | |
160 | #define PERF_HES_STOPPED 0x01 /* the counter is stopped */ | |
161 | #define PERF_HES_UPTODATE 0x02 /* event->count up-to-date */ | |
162 | #define PERF_HES_ARCH 0x04 | |
163 | ||
cdd6c482 | 164 | struct perf_event; |
621a01ea | 165 | |
8d2cacbb PZ |
166 | /* |
167 | * Common implementation detail of pmu::{start,commit,cancel}_txn | |
168 | */ | |
169 | #define PERF_EVENT_TXN 0x1 | |
6bde9b6c | 170 | |
53b25335 VW |
171 | /** |
172 | * pmu::capabilities flags | |
173 | */ | |
174 | #define PERF_PMU_CAP_NO_INTERRUPT 0x01 | |
34f43927 | 175 | #define PERF_PMU_CAP_NO_NMI 0x02 |
0a4e38e6 | 176 | #define PERF_PMU_CAP_AUX_NO_SG 0x04 |
6a279230 | 177 | #define PERF_PMU_CAP_AUX_SW_DOUBLEBUF 0x08 |
bed5b25a | 178 | #define PERF_PMU_CAP_EXCLUSIVE 0x10 |
ec0d7729 | 179 | #define PERF_PMU_CAP_ITRACE 0x20 |
53b25335 | 180 | |
621a01ea | 181 | /** |
4aeb0b42 | 182 | * struct pmu - generic performance monitoring unit |
621a01ea | 183 | */ |
4aeb0b42 | 184 | struct pmu { |
b0a873eb PZ |
185 | struct list_head entry; |
186 | ||
c464c76e | 187 | struct module *module; |
abe43400 | 188 | struct device *dev; |
0c9d42ed | 189 | const struct attribute_group **attr_groups; |
03d8e80b | 190 | const char *name; |
2e80a82a PZ |
191 | int type; |
192 | ||
53b25335 VW |
193 | /* |
194 | * various common per-pmu feature flags | |
195 | */ | |
196 | int capabilities; | |
197 | ||
108b02cf PZ |
198 | int * __percpu pmu_disable_count; |
199 | struct perf_cpu_context * __percpu pmu_cpu_context; | |
bed5b25a | 200 | atomic_t exclusive_cnt; /* < 0: cpu; > 0: tsk */ |
8dc85d54 | 201 | int task_ctx_nr; |
62b85639 | 202 | int hrtimer_interval_ms; |
6bde9b6c LM |
203 | |
204 | /* | |
a4eaf7f1 PZ |
205 | * Fully disable/enable this PMU, can be used to protect from the PMI |
206 | * as well as for lazy/batch writing of the MSRs. | |
6bde9b6c | 207 | */ |
ad5133b7 PZ |
208 | void (*pmu_enable) (struct pmu *pmu); /* optional */ |
209 | void (*pmu_disable) (struct pmu *pmu); /* optional */ | |
6bde9b6c | 210 | |
8d2cacbb | 211 | /* |
a4eaf7f1 | 212 | * Try and initialize the event for this PMU. |
24cd7f54 | 213 | * Should return -ENOENT when the @event doesn't match this PMU. |
8d2cacbb | 214 | */ |
b0a873eb PZ |
215 | int (*event_init) (struct perf_event *event); |
216 | ||
1e0fb9ec AL |
217 | /* |
218 | * Notification that the event was mapped or unmapped. Called | |
219 | * in the context of the mapping task. | |
220 | */ | |
221 | void (*event_mapped) (struct perf_event *event); /*optional*/ | |
222 | void (*event_unmapped) (struct perf_event *event); /*optional*/ | |
223 | ||
a4eaf7f1 PZ |
224 | #define PERF_EF_START 0x01 /* start the counter when adding */ |
225 | #define PERF_EF_RELOAD 0x02 /* reload the counter when starting */ | |
226 | #define PERF_EF_UPDATE 0x04 /* update the counter when stopping */ | |
227 | ||
8d2cacbb | 228 | /* |
a4eaf7f1 PZ |
229 | * Adds/Removes a counter to/from the PMU, can be done inside |
230 | * a transaction, see the ->*_txn() methods. | |
231 | */ | |
232 | int (*add) (struct perf_event *event, int flags); | |
233 | void (*del) (struct perf_event *event, int flags); | |
234 | ||
235 | /* | |
236 | * Starts/Stops a counter present on the PMU. The PMI handler | |
237 | * should stop the counter when perf_event_overflow() returns | |
238 | * !0. ->start() will be used to continue. | |
239 | */ | |
240 | void (*start) (struct perf_event *event, int flags); | |
241 | void (*stop) (struct perf_event *event, int flags); | |
242 | ||
243 | /* | |
244 | * Updates the counter value of the event. | |
245 | */ | |
cdd6c482 | 246 | void (*read) (struct perf_event *event); |
6bde9b6c LM |
247 | |
248 | /* | |
24cd7f54 PZ |
249 | * Group events scheduling is treated as a transaction, add |
250 | * group events as a whole and perform one schedulability test. | |
251 | * If the test fails, roll back the whole group | |
a4eaf7f1 PZ |
252 | * |
253 | * Start the transaction, after this ->add() doesn't need to | |
24cd7f54 | 254 | * do schedulability tests. |
8d2cacbb | 255 | */ |
e7e7ee2e | 256 | void (*start_txn) (struct pmu *pmu); /* optional */ |
8d2cacbb | 257 | /* |
a4eaf7f1 | 258 | * If ->start_txn() disabled the ->add() schedulability test |
8d2cacbb PZ |
259 | * then ->commit_txn() is required to perform one. On success |
260 | * the transaction is closed. On error the transaction is kept | |
261 | * open until ->cancel_txn() is called. | |
262 | */ | |
e7e7ee2e | 263 | int (*commit_txn) (struct pmu *pmu); /* optional */ |
8d2cacbb | 264 | /* |
a4eaf7f1 | 265 | * Will cancel the transaction, assumes ->del() is called |
25985edc | 266 | * for each successful ->add() during the transaction. |
8d2cacbb | 267 | */ |
e7e7ee2e | 268 | void (*cancel_txn) (struct pmu *pmu); /* optional */ |
35edc2a5 PZ |
269 | |
270 | /* | |
271 | * Will return the value for perf_event_mmap_page::index for this event, | |
272 | * if no implementation is provided it will default to: event->hw.idx + 1. | |
273 | */ | |
274 | int (*event_idx) (struct perf_event *event); /*optional */ | |
d010b332 | 275 | |
ba532500 YZ |
276 | /* |
277 | * context-switches callback | |
278 | */ | |
279 | void (*sched_task) (struct perf_event_context *ctx, | |
280 | bool sched_in); | |
4af57ef2 YZ |
281 | /* |
282 | * PMU specific data size | |
283 | */ | |
284 | size_t task_ctx_size; | |
ba532500 | 285 | |
eacd3ecc MF |
286 | |
287 | /* | |
288 | * Return the count value for a counter. | |
289 | */ | |
290 | u64 (*count) (struct perf_event *event); /*optional*/ | |
45bfb2e5 PZ |
291 | |
292 | /* | |
293 | * Set up pmu-private data structures for an AUX area | |
294 | */ | |
295 | void *(*setup_aux) (int cpu, void **pages, | |
296 | int nr_pages, bool overwrite); | |
297 | /* optional */ | |
298 | ||
299 | /* | |
300 | * Free pmu-private AUX data structures | |
301 | */ | |
302 | void (*free_aux) (void *aux); /* optional */ | |
621a01ea IM |
303 | }; |
304 | ||
6a930700 | 305 | /** |
cdd6c482 | 306 | * enum perf_event_active_state - the states of a event |
6a930700 | 307 | */ |
cdd6c482 | 308 | enum perf_event_active_state { |
179033b3 | 309 | PERF_EVENT_STATE_EXIT = -3, |
57c0c15b | 310 | PERF_EVENT_STATE_ERROR = -2, |
cdd6c482 IM |
311 | PERF_EVENT_STATE_OFF = -1, |
312 | PERF_EVENT_STATE_INACTIVE = 0, | |
57c0c15b | 313 | PERF_EVENT_STATE_ACTIVE = 1, |
6a930700 IM |
314 | }; |
315 | ||
9b51f66d | 316 | struct file; |
453f19ee PZ |
317 | struct perf_sample_data; |
318 | ||
a8b0ca17 | 319 | typedef void (*perf_overflow_handler_t)(struct perf_event *, |
b326e956 FW |
320 | struct perf_sample_data *, |
321 | struct pt_regs *regs); | |
322 | ||
d6f962b5 | 323 | enum perf_group_flag { |
e7e7ee2e | 324 | PERF_GROUP_SOFTWARE = 0x1, |
d6f962b5 FW |
325 | }; |
326 | ||
e7e7ee2e IM |
327 | #define SWEVENT_HLIST_BITS 8 |
328 | #define SWEVENT_HLIST_SIZE (1 << SWEVENT_HLIST_BITS) | |
76e1d904 FW |
329 | |
330 | struct swevent_hlist { | |
e7e7ee2e IM |
331 | struct hlist_head heads[SWEVENT_HLIST_SIZE]; |
332 | struct rcu_head rcu_head; | |
76e1d904 FW |
333 | }; |
334 | ||
8a49542c PZ |
335 | #define PERF_ATTACH_CONTEXT 0x01 |
336 | #define PERF_ATTACH_GROUP 0x02 | |
d580ff86 | 337 | #define PERF_ATTACH_TASK 0x04 |
4af57ef2 | 338 | #define PERF_ATTACH_TASK_DATA 0x08 |
8a49542c | 339 | |
877c6856 | 340 | struct perf_cgroup; |
76369139 FW |
341 | struct ring_buffer; |
342 | ||
0793a61d | 343 | /** |
cdd6c482 | 344 | * struct perf_event - performance event kernel representation: |
0793a61d | 345 | */ |
cdd6c482 IM |
346 | struct perf_event { |
347 | #ifdef CONFIG_PERF_EVENTS | |
9886167d PZ |
348 | /* |
349 | * entry onto perf_event_context::event_list; | |
350 | * modifications require ctx->lock | |
351 | * RCU safe iterations. | |
352 | */ | |
592903cd | 353 | struct list_head event_entry; |
9886167d PZ |
354 | |
355 | /* | |
356 | * XXX: group_entry and sibling_list should be mutually exclusive; | |
357 | * either you're a sibling on a group, or you're the group leader. | |
358 | * Rework the code to always use the same list element. | |
359 | * | |
360 | * Locked for modification by both ctx->mutex and ctx->lock; holding | |
361 | * either sufficies for read. | |
362 | */ | |
363 | struct list_head group_entry; | |
04289bb9 | 364 | struct list_head sibling_list; |
9886167d PZ |
365 | |
366 | /* | |
367 | * We need storage to track the entries in perf_pmu_migrate_context; we | |
368 | * cannot use the event_entry because of RCU and we want to keep the | |
369 | * group in tact which avoids us using the other two entries. | |
370 | */ | |
371 | struct list_head migrate_entry; | |
372 | ||
f3ae75de SE |
373 | struct hlist_node hlist_entry; |
374 | struct list_head active_entry; | |
0127c3ea | 375 | int nr_siblings; |
d6f962b5 | 376 | int group_flags; |
cdd6c482 | 377 | struct perf_event *group_leader; |
a4eaf7f1 | 378 | struct pmu *pmu; |
04289bb9 | 379 | |
cdd6c482 | 380 | enum perf_event_active_state state; |
8a49542c | 381 | unsigned int attach_state; |
e7850595 | 382 | local64_t count; |
a6e6dea6 | 383 | atomic64_t child_count; |
ee06094f | 384 | |
53cfbf59 | 385 | /* |
cdd6c482 | 386 | * These are the total time in nanoseconds that the event |
53cfbf59 | 387 | * has been enabled (i.e. eligible to run, and the task has |
cdd6c482 | 388 | * been scheduled in, if this is a per-task event) |
53cfbf59 PM |
389 | * and running (scheduled onto the CPU), respectively. |
390 | * | |
391 | * They are computed from tstamp_enabled, tstamp_running and | |
cdd6c482 | 392 | * tstamp_stopped when the event is in INACTIVE or ACTIVE state. |
53cfbf59 PM |
393 | */ |
394 | u64 total_time_enabled; | |
395 | u64 total_time_running; | |
396 | ||
397 | /* | |
398 | * These are timestamps used for computing total_time_enabled | |
cdd6c482 | 399 | * and total_time_running when the event is in INACTIVE or |
53cfbf59 PM |
400 | * ACTIVE state, measured in nanoseconds from an arbitrary point |
401 | * in time. | |
cdd6c482 IM |
402 | * tstamp_enabled: the notional time when the event was enabled |
403 | * tstamp_running: the notional time when the event was scheduled on | |
53cfbf59 | 404 | * tstamp_stopped: in INACTIVE state, the notional time when the |
cdd6c482 | 405 | * event was scheduled off. |
53cfbf59 PM |
406 | */ |
407 | u64 tstamp_enabled; | |
408 | u64 tstamp_running; | |
409 | u64 tstamp_stopped; | |
410 | ||
eed01528 SE |
411 | /* |
412 | * timestamp shadows the actual context timing but it can | |
413 | * be safely used in NMI interrupt context. It reflects the | |
414 | * context time as it was when the event was last scheduled in. | |
415 | * | |
416 | * ctx_time already accounts for ctx->timestamp. Therefore to | |
417 | * compute ctx_time for a sample, simply add perf_clock(). | |
418 | */ | |
419 | u64 shadow_ctx_time; | |
420 | ||
24f1e32c | 421 | struct perf_event_attr attr; |
c320c7b7 | 422 | u16 header_size; |
6844c09d | 423 | u16 id_header_size; |
c320c7b7 | 424 | u16 read_size; |
cdd6c482 | 425 | struct hw_perf_event hw; |
0793a61d | 426 | |
cdd6c482 | 427 | struct perf_event_context *ctx; |
a6fa941d | 428 | atomic_long_t refcount; |
0793a61d | 429 | |
53cfbf59 PM |
430 | /* |
431 | * These accumulate total time (in nanoseconds) that children | |
cdd6c482 | 432 | * events have been enabled and running, respectively. |
53cfbf59 PM |
433 | */ |
434 | atomic64_t child_total_time_enabled; | |
435 | atomic64_t child_total_time_running; | |
436 | ||
0793a61d | 437 | /* |
d859e29f | 438 | * Protect attach/detach and child_list: |
0793a61d | 439 | */ |
fccc714b PZ |
440 | struct mutex child_mutex; |
441 | struct list_head child_list; | |
cdd6c482 | 442 | struct perf_event *parent; |
0793a61d TG |
443 | |
444 | int oncpu; | |
445 | int cpu; | |
446 | ||
082ff5a2 PZ |
447 | struct list_head owner_entry; |
448 | struct task_struct *owner; | |
449 | ||
7b732a75 PZ |
450 | /* mmap bits */ |
451 | struct mutex mmap_mutex; | |
452 | atomic_t mmap_count; | |
26cb63ad | 453 | |
76369139 | 454 | struct ring_buffer *rb; |
10c6db11 | 455 | struct list_head rb_entry; |
b69cf536 PZ |
456 | unsigned long rcu_batches; |
457 | int rcu_pending; | |
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; |
e360adbe | 467 | struct irq_work pending; |
592903cd | 468 | |
79f14641 PZ |
469 | atomic_t event_limit; |
470 | ||
cdd6c482 | 471 | void (*destroy)(struct perf_event *); |
592903cd | 472 | struct rcu_head rcu_head; |
709e50cf PZ |
473 | |
474 | struct pid_namespace *ns; | |
8e5799b1 | 475 | u64 id; |
6fb2915d | 476 | |
34f43927 | 477 | u64 (*clock)(void); |
b326e956 | 478 | perf_overflow_handler_t overflow_handler; |
4dc0da86 | 479 | void *overflow_handler_context; |
453f19ee | 480 | |
07b139c8 | 481 | #ifdef CONFIG_EVENT_TRACING |
1c024eca | 482 | struct ftrace_event_call *tp_event; |
6fb2915d | 483 | struct event_filter *filter; |
ced39002 JO |
484 | #ifdef CONFIG_FUNCTION_TRACER |
485 | struct ftrace_ops ftrace_ops; | |
486 | #endif | |
ee06094f | 487 | #endif |
6fb2915d | 488 | |
e5d1367f SE |
489 | #ifdef CONFIG_CGROUP_PERF |
490 | struct perf_cgroup *cgrp; /* cgroup event is attach to */ | |
491 | int cgrp_defer_enabled; | |
492 | #endif | |
493 | ||
6fb2915d | 494 | #endif /* CONFIG_PERF_EVENTS */ |
0793a61d TG |
495 | }; |
496 | ||
497 | /** | |
cdd6c482 | 498 | * struct perf_event_context - event context structure |
0793a61d | 499 | * |
cdd6c482 | 500 | * Used as a container for task events and CPU events as well: |
0793a61d | 501 | */ |
cdd6c482 | 502 | struct perf_event_context { |
108b02cf | 503 | struct pmu *pmu; |
0793a61d | 504 | /* |
cdd6c482 | 505 | * Protect the states of the events in the list, |
d859e29f | 506 | * nr_active, and the list: |
0793a61d | 507 | */ |
e625cce1 | 508 | raw_spinlock_t lock; |
d859e29f | 509 | /* |
cdd6c482 | 510 | * Protect the list of events. Locking either mutex or lock |
d859e29f PM |
511 | * is sufficient to ensure the list doesn't change; to change |
512 | * the list you need to lock both the mutex and the spinlock. | |
513 | */ | |
a308444c | 514 | struct mutex mutex; |
04289bb9 | 515 | |
2fde4f94 | 516 | struct list_head active_ctx_list; |
889ff015 FW |
517 | struct list_head pinned_groups; |
518 | struct list_head flexible_groups; | |
a308444c | 519 | struct list_head event_list; |
cdd6c482 | 520 | int nr_events; |
a308444c IM |
521 | int nr_active; |
522 | int is_active; | |
bfbd3381 | 523 | int nr_stat; |
0f5a2601 | 524 | int nr_freq; |
dddd3379 | 525 | int rotate_disable; |
a308444c IM |
526 | atomic_t refcount; |
527 | struct task_struct *task; | |
53cfbf59 PM |
528 | |
529 | /* | |
4af4998b | 530 | * Context clock, runs when context enabled. |
53cfbf59 | 531 | */ |
a308444c IM |
532 | u64 time; |
533 | u64 timestamp; | |
564c2b21 PM |
534 | |
535 | /* | |
536 | * These fields let us detect when two contexts have both | |
537 | * been cloned (inherited) from a common ancestor. | |
538 | */ | |
cdd6c482 | 539 | struct perf_event_context *parent_ctx; |
a308444c IM |
540 | u64 parent_gen; |
541 | u64 generation; | |
542 | int pin_count; | |
d010b332 | 543 | int nr_cgroups; /* cgroup evts */ |
4af57ef2 | 544 | void *task_ctx_data; /* pmu specific data */ |
28009ce4 | 545 | struct rcu_head rcu_head; |
fadfe7be JO |
546 | |
547 | struct delayed_work orphans_remove; | |
548 | bool orphans_remove_sched; | |
0793a61d TG |
549 | }; |
550 | ||
7ae07ea3 FW |
551 | /* |
552 | * Number of contexts where an event can trigger: | |
e7e7ee2e | 553 | * task, softirq, hardirq, nmi. |
7ae07ea3 FW |
554 | */ |
555 | #define PERF_NR_CONTEXTS 4 | |
556 | ||
0793a61d | 557 | /** |
cdd6c482 | 558 | * struct perf_event_cpu_context - per cpu event context structure |
0793a61d TG |
559 | */ |
560 | struct perf_cpu_context { | |
cdd6c482 IM |
561 | struct perf_event_context ctx; |
562 | struct perf_event_context *task_ctx; | |
0793a61d | 563 | int active_oncpu; |
3b6f9e5c | 564 | int exclusive; |
9e630205 SE |
565 | struct hrtimer hrtimer; |
566 | ktime_t hrtimer_interval; | |
3f1f3320 | 567 | struct pmu *unique_pmu; |
e5d1367f | 568 | struct perf_cgroup *cgrp; |
0793a61d TG |
569 | }; |
570 | ||
5622f295 | 571 | struct perf_output_handle { |
57c0c15b | 572 | struct perf_event *event; |
76369139 | 573 | struct ring_buffer *rb; |
6d1acfd5 | 574 | unsigned long wakeup; |
5d967a8b | 575 | unsigned long size; |
fdc26706 AS |
576 | union { |
577 | void *addr; | |
578 | unsigned long head; | |
579 | }; | |
5d967a8b | 580 | int page; |
5622f295 MM |
581 | }; |
582 | ||
39bed6cb MF |
583 | #ifdef CONFIG_CGROUP_PERF |
584 | ||
585 | /* | |
586 | * perf_cgroup_info keeps track of time_enabled for a cgroup. | |
587 | * This is a per-cpu dynamically allocated data structure. | |
588 | */ | |
589 | struct perf_cgroup_info { | |
590 | u64 time; | |
591 | u64 timestamp; | |
592 | }; | |
593 | ||
594 | struct perf_cgroup { | |
595 | struct cgroup_subsys_state css; | |
596 | struct perf_cgroup_info __percpu *info; | |
597 | }; | |
598 | ||
599 | /* | |
600 | * Must ensure cgroup is pinned (css_get) before calling | |
601 | * this function. In other words, we cannot call this function | |
602 | * if there is no cgroup event for the current CPU context. | |
603 | */ | |
604 | static inline struct perf_cgroup * | |
605 | perf_cgroup_from_task(struct task_struct *task) | |
606 | { | |
607 | return container_of(task_css(task, perf_event_cgrp_id), | |
608 | struct perf_cgroup, css); | |
609 | } | |
610 | #endif /* CONFIG_CGROUP_PERF */ | |
611 | ||
cdd6c482 | 612 | #ifdef CONFIG_PERF_EVENTS |
829b42dd | 613 | |
fdc26706 AS |
614 | extern void *perf_aux_output_begin(struct perf_output_handle *handle, |
615 | struct perf_event *event); | |
616 | extern void perf_aux_output_end(struct perf_output_handle *handle, | |
617 | unsigned long size, bool truncated); | |
618 | extern int perf_aux_output_skip(struct perf_output_handle *handle, | |
619 | unsigned long size); | |
620 | extern void *perf_get_aux(struct perf_output_handle *handle); | |
621 | ||
03d8e80b | 622 | extern int perf_pmu_register(struct pmu *pmu, const char *name, int type); |
b0a873eb | 623 | extern void perf_pmu_unregister(struct pmu *pmu); |
621a01ea | 624 | |
3bf101ba | 625 | extern int perf_num_counters(void); |
84c79910 | 626 | extern const char *perf_pmu_name(void); |
ab0cce56 JO |
627 | extern void __perf_event_task_sched_in(struct task_struct *prev, |
628 | struct task_struct *task); | |
629 | extern void __perf_event_task_sched_out(struct task_struct *prev, | |
630 | struct task_struct *next); | |
cdd6c482 IM |
631 | extern int perf_event_init_task(struct task_struct *child); |
632 | extern void perf_event_exit_task(struct task_struct *child); | |
633 | extern void perf_event_free_task(struct task_struct *task); | |
4e231c79 | 634 | extern void perf_event_delayed_put(struct task_struct *task); |
cdd6c482 | 635 | extern void perf_event_print_debug(void); |
33696fc0 PZ |
636 | extern void perf_pmu_disable(struct pmu *pmu); |
637 | extern void perf_pmu_enable(struct pmu *pmu); | |
ba532500 YZ |
638 | extern void perf_sched_cb_dec(struct pmu *pmu); |
639 | extern void perf_sched_cb_inc(struct pmu *pmu); | |
cdd6c482 IM |
640 | extern int perf_event_task_disable(void); |
641 | extern int perf_event_task_enable(void); | |
26ca5c11 | 642 | extern int perf_event_refresh(struct perf_event *event, int refresh); |
cdd6c482 | 643 | extern void perf_event_update_userpage(struct perf_event *event); |
fb0459d7 AV |
644 | extern int perf_event_release_kernel(struct perf_event *event); |
645 | extern struct perf_event * | |
646 | perf_event_create_kernel_counter(struct perf_event_attr *attr, | |
647 | int cpu, | |
38a81da2 | 648 | struct task_struct *task, |
4dc0da86 AK |
649 | perf_overflow_handler_t callback, |
650 | void *context); | |
0cda4c02 YZ |
651 | extern void perf_pmu_migrate_context(struct pmu *pmu, |
652 | int src_cpu, int dst_cpu); | |
59ed446f PZ |
653 | extern u64 perf_event_read_value(struct perf_event *event, |
654 | u64 *enabled, u64 *running); | |
5c92d124 | 655 | |
d010b332 | 656 | |
df1a132b | 657 | struct perf_sample_data { |
2565711f PZ |
658 | /* |
659 | * Fields set by perf_sample_data_init(), group so as to | |
660 | * minimize the cachelines touched. | |
661 | */ | |
662 | u64 addr; | |
663 | struct perf_raw_record *raw; | |
664 | struct perf_branch_stack *br_stack; | |
665 | u64 period; | |
666 | u64 weight; | |
667 | u64 txn; | |
668 | union perf_mem_data_src data_src; | |
5622f295 | 669 | |
2565711f PZ |
670 | /* |
671 | * The other fields, optionally {set,used} by | |
672 | * perf_{prepare,output}_sample(). | |
673 | */ | |
674 | u64 type; | |
5622f295 MM |
675 | u64 ip; |
676 | struct { | |
677 | u32 pid; | |
678 | u32 tid; | |
679 | } tid_entry; | |
680 | u64 time; | |
5622f295 MM |
681 | u64 id; |
682 | u64 stream_id; | |
683 | struct { | |
684 | u32 cpu; | |
685 | u32 reserved; | |
686 | } cpu_entry; | |
5622f295 | 687 | struct perf_callchain_entry *callchain; |
88a7c26a AL |
688 | |
689 | /* | |
690 | * regs_user may point to task_pt_regs or to regs_user_copy, depending | |
691 | * on arch details. | |
692 | */ | |
60e2364e | 693 | struct perf_regs regs_user; |
88a7c26a AL |
694 | struct pt_regs regs_user_copy; |
695 | ||
60e2364e | 696 | struct perf_regs regs_intr; |
c5ebcedb | 697 | u64 stack_user_size; |
2565711f | 698 | } ____cacheline_aligned; |
df1a132b | 699 | |
770eee1f SE |
700 | /* default value for data source */ |
701 | #define PERF_MEM_NA (PERF_MEM_S(OP, NA) |\ | |
702 | PERF_MEM_S(LVL, NA) |\ | |
703 | PERF_MEM_S(SNOOP, NA) |\ | |
704 | PERF_MEM_S(LOCK, NA) |\ | |
705 | PERF_MEM_S(TLB, NA)) | |
706 | ||
fd0d000b RR |
707 | static inline void perf_sample_data_init(struct perf_sample_data *data, |
708 | u64 addr, u64 period) | |
dc1d628a | 709 | { |
fd0d000b | 710 | /* remaining struct members initialized in perf_prepare_sample() */ |
dc1d628a PZ |
711 | data->addr = addr; |
712 | data->raw = NULL; | |
bce38cd5 | 713 | data->br_stack = NULL; |
4018994f | 714 | data->period = period; |
c3feedf2 | 715 | data->weight = 0; |
770eee1f | 716 | data->data_src.val = PERF_MEM_NA; |
fdfbbd07 | 717 | data->txn = 0; |
dc1d628a PZ |
718 | } |
719 | ||
5622f295 MM |
720 | extern void perf_output_sample(struct perf_output_handle *handle, |
721 | struct perf_event_header *header, | |
722 | struct perf_sample_data *data, | |
cdd6c482 | 723 | struct perf_event *event); |
5622f295 MM |
724 | extern void perf_prepare_sample(struct perf_event_header *header, |
725 | struct perf_sample_data *data, | |
cdd6c482 | 726 | struct perf_event *event, |
5622f295 MM |
727 | struct pt_regs *regs); |
728 | ||
a8b0ca17 | 729 | extern int perf_event_overflow(struct perf_event *event, |
5622f295 MM |
730 | struct perf_sample_data *data, |
731 | struct pt_regs *regs); | |
df1a132b | 732 | |
6c7e550f FBH |
733 | static inline bool is_sampling_event(struct perf_event *event) |
734 | { | |
735 | return event->attr.sample_period != 0; | |
736 | } | |
737 | ||
3b6f9e5c | 738 | /* |
cdd6c482 | 739 | * Return 1 for a software event, 0 for a hardware event |
3b6f9e5c | 740 | */ |
cdd6c482 | 741 | static inline int is_software_event(struct perf_event *event) |
3b6f9e5c | 742 | { |
89a1e187 | 743 | return event->pmu->task_ctx_nr == perf_sw_context; |
3b6f9e5c PM |
744 | } |
745 | ||
c5905afb | 746 | extern struct static_key perf_swevent_enabled[PERF_COUNT_SW_MAX]; |
f29ac756 | 747 | |
86038c5e | 748 | extern void ___perf_sw_event(u32, u64, struct pt_regs *, u64); |
a8b0ca17 | 749 | extern void __perf_sw_event(u32, u64, struct pt_regs *, u64); |
f29ac756 | 750 | |
b0f82b81 | 751 | #ifndef perf_arch_fetch_caller_regs |
e7e7ee2e | 752 | static inline void perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip) { } |
b0f82b81 | 753 | #endif |
5331d7b8 FW |
754 | |
755 | /* | |
756 | * Take a snapshot of the regs. Skip ip and frame pointer to | |
757 | * the nth caller. We only need a few of the regs: | |
758 | * - ip for PERF_SAMPLE_IP | |
759 | * - cs for user_mode() tests | |
760 | * - bp for callchains | |
761 | * - eflags, for future purposes, just in case | |
762 | */ | |
b0f82b81 | 763 | static inline void perf_fetch_caller_regs(struct pt_regs *regs) |
5331d7b8 | 764 | { |
5331d7b8 FW |
765 | memset(regs, 0, sizeof(*regs)); |
766 | ||
b0f82b81 | 767 | perf_arch_fetch_caller_regs(regs, CALLER_ADDR0); |
5331d7b8 FW |
768 | } |
769 | ||
7e54a5a0 | 770 | static __always_inline void |
a8b0ca17 | 771 | perf_sw_event(u32 event_id, u64 nr, struct pt_regs *regs, u64 addr) |
e49a5bd3 | 772 | { |
86038c5e PZI |
773 | if (static_key_false(&perf_swevent_enabled[event_id])) |
774 | __perf_sw_event(event_id, nr, regs, addr); | |
775 | } | |
776 | ||
777 | DECLARE_PER_CPU(struct pt_regs, __perf_regs[4]); | |
7e54a5a0 | 778 | |
86038c5e PZI |
779 | /* |
780 | * 'Special' version for the scheduler, it hard assumes no recursion, | |
781 | * which is guaranteed by us not actually scheduling inside other swevents | |
782 | * because those disable preemption. | |
783 | */ | |
784 | static __always_inline void | |
785 | perf_sw_event_sched(u32 event_id, u64 nr, u64 addr) | |
786 | { | |
c5905afb | 787 | if (static_key_false(&perf_swevent_enabled[event_id])) { |
86038c5e PZI |
788 | struct pt_regs *regs = this_cpu_ptr(&__perf_regs[0]); |
789 | ||
790 | perf_fetch_caller_regs(regs); | |
791 | ___perf_sw_event(event_id, nr, regs, addr); | |
e49a5bd3 FW |
792 | } |
793 | } | |
794 | ||
c5905afb | 795 | extern struct static_key_deferred perf_sched_events; |
ee6dcfa4 | 796 | |
ff303e66 PZ |
797 | static __always_inline bool |
798 | perf_sw_migrate_enabled(void) | |
799 | { | |
800 | if (static_key_false(&perf_swevent_enabled[PERF_COUNT_SW_CPU_MIGRATIONS])) | |
801 | return true; | |
802 | return false; | |
803 | } | |
804 | ||
805 | static inline void perf_event_task_migrate(struct task_struct *task) | |
806 | { | |
807 | if (perf_sw_migrate_enabled()) | |
808 | task->sched_migrated = 1; | |
809 | } | |
810 | ||
ab0cce56 | 811 | static inline void perf_event_task_sched_in(struct task_struct *prev, |
a8d757ef | 812 | struct task_struct *task) |
ab0cce56 JO |
813 | { |
814 | if (static_key_false(&perf_sched_events.key)) | |
815 | __perf_event_task_sched_in(prev, task); | |
ff303e66 PZ |
816 | |
817 | if (perf_sw_migrate_enabled() && task->sched_migrated) { | |
818 | struct pt_regs *regs = this_cpu_ptr(&__perf_regs[0]); | |
819 | ||
820 | perf_fetch_caller_regs(regs); | |
821 | ___perf_sw_event(PERF_COUNT_SW_CPU_MIGRATIONS, 1, regs, 0); | |
822 | task->sched_migrated = 0; | |
823 | } | |
ab0cce56 JO |
824 | } |
825 | ||
826 | static inline void perf_event_task_sched_out(struct task_struct *prev, | |
827 | struct task_struct *next) | |
ee6dcfa4 | 828 | { |
86038c5e | 829 | perf_sw_event_sched(PERF_COUNT_SW_CONTEXT_SWITCHES, 1, 0); |
ee6dcfa4 | 830 | |
c5905afb | 831 | if (static_key_false(&perf_sched_events.key)) |
ab0cce56 | 832 | __perf_event_task_sched_out(prev, next); |
ee6dcfa4 PZ |
833 | } |
834 | ||
eacd3ecc MF |
835 | static inline u64 __perf_event_count(struct perf_event *event) |
836 | { | |
837 | return local64_read(&event->count) + atomic64_read(&event->child_count); | |
838 | } | |
839 | ||
3af9e859 | 840 | extern void perf_event_mmap(struct vm_area_struct *vma); |
39447b38 | 841 | extern struct perf_guest_info_callbacks *perf_guest_cbs; |
dcf46b94 ZY |
842 | extern int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks); |
843 | extern int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks); | |
39447b38 | 844 | |
e041e328 | 845 | extern void perf_event_exec(void); |
82b89778 | 846 | extern void perf_event_comm(struct task_struct *tsk, bool exec); |
cdd6c482 | 847 | extern void perf_event_fork(struct task_struct *tsk); |
8d1b2d93 | 848 | |
56962b44 FW |
849 | /* Callchains */ |
850 | DECLARE_PER_CPU(struct perf_callchain_entry, perf_callchain_entry); | |
851 | ||
e7e7ee2e IM |
852 | extern void perf_callchain_user(struct perf_callchain_entry *entry, struct pt_regs *regs); |
853 | extern void perf_callchain_kernel(struct perf_callchain_entry *entry, struct pt_regs *regs); | |
394ee076 | 854 | |
e7e7ee2e | 855 | static inline void perf_callchain_store(struct perf_callchain_entry *entry, u64 ip) |
70791ce9 FW |
856 | { |
857 | if (entry->nr < PERF_MAX_STACK_DEPTH) | |
858 | entry->ip[entry->nr++] = ip; | |
859 | } | |
394ee076 | 860 | |
cdd6c482 IM |
861 | extern int sysctl_perf_event_paranoid; |
862 | extern int sysctl_perf_event_mlock; | |
863 | extern int sysctl_perf_event_sample_rate; | |
14c63f17 DH |
864 | extern int sysctl_perf_cpu_time_max_percent; |
865 | ||
866 | extern void perf_sample_event_took(u64 sample_len_ns); | |
1ccd1549 | 867 | |
163ec435 PZ |
868 | extern int perf_proc_update_handler(struct ctl_table *table, int write, |
869 | void __user *buffer, size_t *lenp, | |
870 | loff_t *ppos); | |
14c63f17 DH |
871 | extern int perf_cpu_time_max_percent_handler(struct ctl_table *table, int write, |
872 | void __user *buffer, size_t *lenp, | |
873 | loff_t *ppos); | |
874 | ||
163ec435 | 875 | |
320ebf09 PZ |
876 | static inline bool perf_paranoid_tracepoint_raw(void) |
877 | { | |
878 | return sysctl_perf_event_paranoid > -1; | |
879 | } | |
880 | ||
881 | static inline bool perf_paranoid_cpu(void) | |
882 | { | |
883 | return sysctl_perf_event_paranoid > 0; | |
884 | } | |
885 | ||
886 | static inline bool perf_paranoid_kernel(void) | |
887 | { | |
888 | return sysctl_perf_event_paranoid > 1; | |
889 | } | |
890 | ||
cdd6c482 | 891 | extern void perf_event_init(void); |
1c024eca PZ |
892 | extern void perf_tp_event(u64 addr, u64 count, void *record, |
893 | int entry_size, struct pt_regs *regs, | |
e6dab5ff AV |
894 | struct hlist_head *head, int rctx, |
895 | struct task_struct *task); | |
24f1e32c | 896 | extern void perf_bp_event(struct perf_event *event, void *data); |
0d905bca | 897 | |
9d23a90a | 898 | #ifndef perf_misc_flags |
e7e7ee2e IM |
899 | # define perf_misc_flags(regs) \ |
900 | (user_mode(regs) ? PERF_RECORD_MISC_USER : PERF_RECORD_MISC_KERNEL) | |
901 | # define perf_instruction_pointer(regs) instruction_pointer(regs) | |
9d23a90a PM |
902 | #endif |
903 | ||
bce38cd5 SE |
904 | static inline bool has_branch_stack(struct perf_event *event) |
905 | { | |
906 | return event->attr.sample_type & PERF_SAMPLE_BRANCH_STACK; | |
a46a2300 YZ |
907 | } |
908 | ||
909 | static inline bool needs_branch_stack(struct perf_event *event) | |
910 | { | |
911 | return event->attr.branch_sample_type != 0; | |
bce38cd5 SE |
912 | } |
913 | ||
45bfb2e5 PZ |
914 | static inline bool has_aux(struct perf_event *event) |
915 | { | |
916 | return event->pmu->setup_aux; | |
917 | } | |
918 | ||
5622f295 | 919 | extern int perf_output_begin(struct perf_output_handle *handle, |
a7ac67ea | 920 | struct perf_event *event, unsigned int size); |
5622f295 | 921 | extern void perf_output_end(struct perf_output_handle *handle); |
91d7753a | 922 | extern unsigned int perf_output_copy(struct perf_output_handle *handle, |
5622f295 | 923 | const void *buf, unsigned int len); |
5685e0ff JO |
924 | extern unsigned int perf_output_skip(struct perf_output_handle *handle, |
925 | unsigned int len); | |
4ed7c92d PZ |
926 | extern int perf_swevent_get_recursion_context(void); |
927 | extern void perf_swevent_put_recursion_context(int rctx); | |
ab573844 | 928 | extern u64 perf_swevent_set_period(struct perf_event *event); |
44234adc FW |
929 | extern void perf_event_enable(struct perf_event *event); |
930 | extern void perf_event_disable(struct perf_event *event); | |
500ad2d8 | 931 | extern int __perf_event_disable(void *info); |
e9d2b064 | 932 | extern void perf_event_task_tick(void); |
e041e328 | 933 | #else /* !CONFIG_PERF_EVENTS: */ |
fdc26706 AS |
934 | static inline void * |
935 | perf_aux_output_begin(struct perf_output_handle *handle, | |
936 | struct perf_event *event) { return NULL; } | |
937 | static inline void | |
938 | perf_aux_output_end(struct perf_output_handle *handle, unsigned long size, | |
939 | bool truncated) { } | |
940 | static inline int | |
941 | perf_aux_output_skip(struct perf_output_handle *handle, | |
942 | unsigned long size) { return -EINVAL; } | |
943 | static inline void * | |
944 | perf_get_aux(struct perf_output_handle *handle) { return NULL; } | |
0793a61d | 945 | static inline void |
ff303e66 PZ |
946 | perf_event_task_migrate(struct task_struct *task) { } |
947 | static inline void | |
ab0cce56 JO |
948 | perf_event_task_sched_in(struct task_struct *prev, |
949 | struct task_struct *task) { } | |
950 | static inline void | |
951 | perf_event_task_sched_out(struct task_struct *prev, | |
952 | struct task_struct *next) { } | |
cdd6c482 IM |
953 | static inline int perf_event_init_task(struct task_struct *child) { return 0; } |
954 | static inline void perf_event_exit_task(struct task_struct *child) { } | |
955 | static inline void perf_event_free_task(struct task_struct *task) { } | |
4e231c79 | 956 | static inline void perf_event_delayed_put(struct task_struct *task) { } |
57c0c15b | 957 | static inline void perf_event_print_debug(void) { } |
57c0c15b IM |
958 | static inline int perf_event_task_disable(void) { return -EINVAL; } |
959 | static inline int perf_event_task_enable(void) { return -EINVAL; } | |
26ca5c11 AK |
960 | static inline int perf_event_refresh(struct perf_event *event, int refresh) |
961 | { | |
962 | return -EINVAL; | |
963 | } | |
15dbf27c | 964 | |
925d519a | 965 | static inline void |
a8b0ca17 | 966 | perf_sw_event(u32 event_id, u64 nr, struct pt_regs *regs, u64 addr) { } |
24f1e32c | 967 | static inline void |
86038c5e PZI |
968 | perf_sw_event_sched(u32 event_id, u64 nr, u64 addr) { } |
969 | static inline void | |
184f412c | 970 | perf_bp_event(struct perf_event *event, void *data) { } |
0a4a9391 | 971 | |
39447b38 | 972 | static inline int perf_register_guest_info_callbacks |
e7e7ee2e | 973 | (struct perf_guest_info_callbacks *callbacks) { return 0; } |
39447b38 | 974 | static inline int perf_unregister_guest_info_callbacks |
e7e7ee2e | 975 | (struct perf_guest_info_callbacks *callbacks) { return 0; } |
39447b38 | 976 | |
57c0c15b | 977 | static inline void perf_event_mmap(struct vm_area_struct *vma) { } |
e041e328 | 978 | static inline void perf_event_exec(void) { } |
82b89778 | 979 | static inline void perf_event_comm(struct task_struct *tsk, bool exec) { } |
cdd6c482 IM |
980 | static inline void perf_event_fork(struct task_struct *tsk) { } |
981 | static inline void perf_event_init(void) { } | |
184f412c | 982 | static inline int perf_swevent_get_recursion_context(void) { return -1; } |
4ed7c92d | 983 | static inline void perf_swevent_put_recursion_context(int rctx) { } |
ab573844 | 984 | static inline u64 perf_swevent_set_period(struct perf_event *event) { return 0; } |
44234adc FW |
985 | static inline void perf_event_enable(struct perf_event *event) { } |
986 | static inline void perf_event_disable(struct perf_event *event) { } | |
500ad2d8 | 987 | static inline int __perf_event_disable(void *info) { return -1; } |
e9d2b064 | 988 | static inline void perf_event_task_tick(void) { } |
0793a61d TG |
989 | #endif |
990 | ||
026249ef FW |
991 | #if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_NO_HZ_FULL) |
992 | extern bool perf_event_can_stop_tick(void); | |
993 | #else | |
994 | static inline bool perf_event_can_stop_tick(void) { return true; } | |
995 | #endif | |
996 | ||
6c4d3bc9 DR |
997 | #if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_CPU_SUP_INTEL) |
998 | extern void perf_restore_debug_store(void); | |
999 | #else | |
1d9d8639 | 1000 | static inline void perf_restore_debug_store(void) { } |
0793a61d TG |
1001 | #endif |
1002 | ||
e7e7ee2e | 1003 | #define perf_output_put(handle, x) perf_output_copy((handle), &(x), sizeof(x)) |
5622f295 | 1004 | |
3f6da390 | 1005 | /* |
0a0fca9d | 1006 | * This has to have a higher priority than migration_notifier in sched/core.c. |
3f6da390 | 1007 | */ |
e7e7ee2e IM |
1008 | #define perf_cpu_notifier(fn) \ |
1009 | do { \ | |
0db0628d | 1010 | static struct notifier_block fn##_nb = \ |
e7e7ee2e | 1011 | { .notifier_call = fn, .priority = CPU_PRI_PERF }; \ |
c13d38e4 | 1012 | unsigned long cpu = smp_processor_id(); \ |
6760bca9 | 1013 | unsigned long flags; \ |
f0bdb5e0 SB |
1014 | \ |
1015 | cpu_notifier_register_begin(); \ | |
e7e7ee2e | 1016 | fn(&fn##_nb, (unsigned long)CPU_UP_PREPARE, \ |
c13d38e4 | 1017 | (void *)(unsigned long)cpu); \ |
6760bca9 | 1018 | local_irq_save(flags); \ |
e7e7ee2e | 1019 | fn(&fn##_nb, (unsigned long)CPU_STARTING, \ |
c13d38e4 | 1020 | (void *)(unsigned long)cpu); \ |
6760bca9 | 1021 | local_irq_restore(flags); \ |
e7e7ee2e | 1022 | fn(&fn##_nb, (unsigned long)CPU_ONLINE, \ |
c13d38e4 | 1023 | (void *)(unsigned long)cpu); \ |
f0bdb5e0 SB |
1024 | __register_cpu_notifier(&fn##_nb); \ |
1025 | cpu_notifier_register_done(); \ | |
3f6da390 PZ |
1026 | } while (0) |
1027 | ||
f0bdb5e0 SB |
1028 | /* |
1029 | * Bare-bones version of perf_cpu_notifier(), which doesn't invoke the | |
1030 | * callback for already online CPUs. | |
1031 | */ | |
1032 | #define __perf_cpu_notifier(fn) \ | |
1033 | do { \ | |
1034 | static struct notifier_block fn##_nb = \ | |
1035 | { .notifier_call = fn, .priority = CPU_PRI_PERF }; \ | |
1036 | \ | |
1037 | __register_cpu_notifier(&fn##_nb); \ | |
1038 | } while (0) | |
641cc938 | 1039 | |
2663960c SB |
1040 | struct perf_pmu_events_attr { |
1041 | struct device_attribute attr; | |
1042 | u64 id; | |
3a54aaa0 | 1043 | const char *event_str; |
2663960c SB |
1044 | }; |
1045 | ||
fd979c01 CS |
1046 | ssize_t perf_event_sysfs_show(struct device *dev, struct device_attribute *attr, |
1047 | char *page); | |
1048 | ||
2663960c SB |
1049 | #define PMU_EVENT_ATTR(_name, _var, _id, _show) \ |
1050 | static struct perf_pmu_events_attr _var = { \ | |
1051 | .attr = __ATTR(_name, 0444, _show, NULL), \ | |
1052 | .id = _id, \ | |
1053 | }; | |
1054 | ||
f0405b81 CS |
1055 | #define PMU_EVENT_ATTR_STRING(_name, _var, _str) \ |
1056 | static struct perf_pmu_events_attr _var = { \ | |
1057 | .attr = __ATTR(_name, 0444, perf_event_sysfs_show, NULL), \ | |
1058 | .id = 0, \ | |
1059 | .event_str = _str, \ | |
1060 | }; | |
1061 | ||
641cc938 JO |
1062 | #define PMU_FORMAT_ATTR(_name, _format) \ |
1063 | static ssize_t \ | |
1064 | _name##_show(struct device *dev, \ | |
1065 | struct device_attribute *attr, \ | |
1066 | char *page) \ | |
1067 | { \ | |
1068 | BUILD_BUG_ON(sizeof(_format) >= PAGE_SIZE); \ | |
1069 | return sprintf(page, _format "\n"); \ | |
1070 | } \ | |
1071 | \ | |
1072 | static struct device_attribute format_attr_##_name = __ATTR_RO(_name) | |
1073 | ||
cdd6c482 | 1074 | #endif /* _LINUX_PERF_EVENT_H */ |