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 | ||
43b45780 AH |
95 | struct event_constraint; |
96 | ||
0793a61d | 97 | /** |
cdd6c482 | 98 | * struct hw_perf_event - performance event hardware details: |
0793a61d | 99 | */ |
cdd6c482 IM |
100 | struct hw_perf_event { |
101 | #ifdef CONFIG_PERF_EVENTS | |
d6d020e9 PZ |
102 | union { |
103 | struct { /* hardware */ | |
a308444c | 104 | u64 config; |
447a194b | 105 | u64 last_tag; |
a308444c | 106 | unsigned long config_base; |
cdd6c482 | 107 | unsigned long event_base; |
c48b6053 | 108 | int event_base_rdpmc; |
a308444c | 109 | int idx; |
447a194b | 110 | int last_cpu; |
9fac2cf3 | 111 | int flags; |
bce38cd5 | 112 | |
efc9f05d | 113 | struct hw_perf_event_extra extra_reg; |
bce38cd5 | 114 | struct hw_perf_event_extra branch_reg; |
43b45780 AH |
115 | |
116 | struct event_constraint *constraint; | |
d6d020e9 | 117 | }; |
721a669b | 118 | struct { /* software */ |
a308444c | 119 | struct hrtimer hrtimer; |
d6d020e9 | 120 | }; |
f22c1bb6 | 121 | struct { /* tracepoint */ |
f22c1bb6 ON |
122 | /* for tp_event->class */ |
123 | struct list_head tp_list; | |
124 | }; | |
4afbb24c MF |
125 | struct { /* intel_cqm */ |
126 | int cqm_state; | |
127 | int cqm_rmid; | |
128 | struct list_head cqm_events_entry; | |
129 | struct list_head cqm_groups_entry; | |
130 | struct list_head cqm_group_entry; | |
131 | }; | |
ec0d7729 AS |
132 | struct { /* itrace */ |
133 | int itrace_started; | |
134 | }; | |
24f1e32c | 135 | #ifdef CONFIG_HAVE_HW_BREAKPOINT |
45a73372 | 136 | struct { /* breakpoint */ |
d580ff86 PZ |
137 | /* |
138 | * Crufty hack to avoid the chicken and egg | |
139 | * problem hw_breakpoint has with context | |
140 | * creation and event initalization. | |
141 | */ | |
f22c1bb6 ON |
142 | struct arch_hw_breakpoint info; |
143 | struct list_head bp_list; | |
45a73372 | 144 | }; |
24f1e32c | 145 | #endif |
d6d020e9 | 146 | }; |
50f16a8b | 147 | struct task_struct *target; |
a4eaf7f1 | 148 | int state; |
e7850595 | 149 | local64_t prev_count; |
b23f3325 | 150 | u64 sample_period; |
9e350de3 | 151 | u64 last_period; |
e7850595 | 152 | local64_t period_left; |
e050e3f0 | 153 | u64 interrupts_seq; |
60db5e09 | 154 | u64 interrupts; |
6a24ed6c | 155 | |
abd50713 PZ |
156 | u64 freq_time_stamp; |
157 | u64 freq_count_stamp; | |
ee06094f | 158 | #endif |
0793a61d TG |
159 | }; |
160 | ||
a4eaf7f1 PZ |
161 | /* |
162 | * hw_perf_event::state flags | |
163 | */ | |
164 | #define PERF_HES_STOPPED 0x01 /* the counter is stopped */ | |
165 | #define PERF_HES_UPTODATE 0x02 /* event->count up-to-date */ | |
166 | #define PERF_HES_ARCH 0x04 | |
167 | ||
cdd6c482 | 168 | struct perf_event; |
621a01ea | 169 | |
8d2cacbb PZ |
170 | /* |
171 | * Common implementation detail of pmu::{start,commit,cancel}_txn | |
172 | */ | |
173 | #define PERF_EVENT_TXN 0x1 | |
6bde9b6c | 174 | |
53b25335 VW |
175 | /** |
176 | * pmu::capabilities flags | |
177 | */ | |
178 | #define PERF_PMU_CAP_NO_INTERRUPT 0x01 | |
34f43927 | 179 | #define PERF_PMU_CAP_NO_NMI 0x02 |
0a4e38e6 | 180 | #define PERF_PMU_CAP_AUX_NO_SG 0x04 |
6a279230 | 181 | #define PERF_PMU_CAP_AUX_SW_DOUBLEBUF 0x08 |
bed5b25a | 182 | #define PERF_PMU_CAP_EXCLUSIVE 0x10 |
ec0d7729 | 183 | #define PERF_PMU_CAP_ITRACE 0x20 |
53b25335 | 184 | |
621a01ea | 185 | /** |
4aeb0b42 | 186 | * struct pmu - generic performance monitoring unit |
621a01ea | 187 | */ |
4aeb0b42 | 188 | struct pmu { |
b0a873eb PZ |
189 | struct list_head entry; |
190 | ||
c464c76e | 191 | struct module *module; |
abe43400 | 192 | struct device *dev; |
0c9d42ed | 193 | const struct attribute_group **attr_groups; |
03d8e80b | 194 | const char *name; |
2e80a82a PZ |
195 | int type; |
196 | ||
53b25335 VW |
197 | /* |
198 | * various common per-pmu feature flags | |
199 | */ | |
200 | int capabilities; | |
201 | ||
108b02cf PZ |
202 | int * __percpu pmu_disable_count; |
203 | struct perf_cpu_context * __percpu pmu_cpu_context; | |
bed5b25a | 204 | atomic_t exclusive_cnt; /* < 0: cpu; > 0: tsk */ |
8dc85d54 | 205 | int task_ctx_nr; |
62b85639 | 206 | int hrtimer_interval_ms; |
6bde9b6c LM |
207 | |
208 | /* | |
a4eaf7f1 PZ |
209 | * Fully disable/enable this PMU, can be used to protect from the PMI |
210 | * as well as for lazy/batch writing of the MSRs. | |
6bde9b6c | 211 | */ |
ad5133b7 PZ |
212 | void (*pmu_enable) (struct pmu *pmu); /* optional */ |
213 | void (*pmu_disable) (struct pmu *pmu); /* optional */ | |
6bde9b6c | 214 | |
8d2cacbb | 215 | /* |
a4eaf7f1 | 216 | * Try and initialize the event for this PMU. |
24cd7f54 | 217 | * Should return -ENOENT when the @event doesn't match this PMU. |
8d2cacbb | 218 | */ |
b0a873eb PZ |
219 | int (*event_init) (struct perf_event *event); |
220 | ||
1e0fb9ec AL |
221 | /* |
222 | * Notification that the event was mapped or unmapped. Called | |
223 | * in the context of the mapping task. | |
224 | */ | |
225 | void (*event_mapped) (struct perf_event *event); /*optional*/ | |
226 | void (*event_unmapped) (struct perf_event *event); /*optional*/ | |
227 | ||
a4eaf7f1 PZ |
228 | #define PERF_EF_START 0x01 /* start the counter when adding */ |
229 | #define PERF_EF_RELOAD 0x02 /* reload the counter when starting */ | |
230 | #define PERF_EF_UPDATE 0x04 /* update the counter when stopping */ | |
231 | ||
8d2cacbb | 232 | /* |
a4eaf7f1 PZ |
233 | * Adds/Removes a counter to/from the PMU, can be done inside |
234 | * a transaction, see the ->*_txn() methods. | |
235 | */ | |
236 | int (*add) (struct perf_event *event, int flags); | |
237 | void (*del) (struct perf_event *event, int flags); | |
238 | ||
239 | /* | |
240 | * Starts/Stops a counter present on the PMU. The PMI handler | |
241 | * should stop the counter when perf_event_overflow() returns | |
242 | * !0. ->start() will be used to continue. | |
243 | */ | |
244 | void (*start) (struct perf_event *event, int flags); | |
245 | void (*stop) (struct perf_event *event, int flags); | |
246 | ||
247 | /* | |
248 | * Updates the counter value of the event. | |
249 | */ | |
cdd6c482 | 250 | void (*read) (struct perf_event *event); |
6bde9b6c LM |
251 | |
252 | /* | |
24cd7f54 PZ |
253 | * Group events scheduling is treated as a transaction, add |
254 | * group events as a whole and perform one schedulability test. | |
255 | * If the test fails, roll back the whole group | |
a4eaf7f1 PZ |
256 | * |
257 | * Start the transaction, after this ->add() doesn't need to | |
24cd7f54 | 258 | * do schedulability tests. |
8d2cacbb | 259 | */ |
e7e7ee2e | 260 | void (*start_txn) (struct pmu *pmu); /* optional */ |
8d2cacbb | 261 | /* |
a4eaf7f1 | 262 | * If ->start_txn() disabled the ->add() schedulability test |
8d2cacbb PZ |
263 | * then ->commit_txn() is required to perform one. On success |
264 | * the transaction is closed. On error the transaction is kept | |
265 | * open until ->cancel_txn() is called. | |
266 | */ | |
e7e7ee2e | 267 | int (*commit_txn) (struct pmu *pmu); /* optional */ |
8d2cacbb | 268 | /* |
a4eaf7f1 | 269 | * Will cancel the transaction, assumes ->del() is called |
25985edc | 270 | * for each successful ->add() during the transaction. |
8d2cacbb | 271 | */ |
e7e7ee2e | 272 | void (*cancel_txn) (struct pmu *pmu); /* optional */ |
35edc2a5 PZ |
273 | |
274 | /* | |
275 | * Will return the value for perf_event_mmap_page::index for this event, | |
276 | * if no implementation is provided it will default to: event->hw.idx + 1. | |
277 | */ | |
278 | int (*event_idx) (struct perf_event *event); /*optional */ | |
d010b332 | 279 | |
ba532500 YZ |
280 | /* |
281 | * context-switches callback | |
282 | */ | |
283 | void (*sched_task) (struct perf_event_context *ctx, | |
284 | bool sched_in); | |
4af57ef2 YZ |
285 | /* |
286 | * PMU specific data size | |
287 | */ | |
288 | size_t task_ctx_size; | |
ba532500 | 289 | |
eacd3ecc MF |
290 | |
291 | /* | |
292 | * Return the count value for a counter. | |
293 | */ | |
294 | u64 (*count) (struct perf_event *event); /*optional*/ | |
45bfb2e5 PZ |
295 | |
296 | /* | |
297 | * Set up pmu-private data structures for an AUX area | |
298 | */ | |
299 | void *(*setup_aux) (int cpu, void **pages, | |
300 | int nr_pages, bool overwrite); | |
301 | /* optional */ | |
302 | ||
303 | /* | |
304 | * Free pmu-private AUX data structures | |
305 | */ | |
306 | void (*free_aux) (void *aux); /* optional */ | |
621a01ea IM |
307 | }; |
308 | ||
6a930700 | 309 | /** |
cdd6c482 | 310 | * enum perf_event_active_state - the states of a event |
6a930700 | 311 | */ |
cdd6c482 | 312 | enum perf_event_active_state { |
179033b3 | 313 | PERF_EVENT_STATE_EXIT = -3, |
57c0c15b | 314 | PERF_EVENT_STATE_ERROR = -2, |
cdd6c482 IM |
315 | PERF_EVENT_STATE_OFF = -1, |
316 | PERF_EVENT_STATE_INACTIVE = 0, | |
57c0c15b | 317 | PERF_EVENT_STATE_ACTIVE = 1, |
6a930700 IM |
318 | }; |
319 | ||
9b51f66d | 320 | struct file; |
453f19ee PZ |
321 | struct perf_sample_data; |
322 | ||
a8b0ca17 | 323 | typedef void (*perf_overflow_handler_t)(struct perf_event *, |
b326e956 FW |
324 | struct perf_sample_data *, |
325 | struct pt_regs *regs); | |
326 | ||
d6f962b5 | 327 | enum perf_group_flag { |
e7e7ee2e | 328 | PERF_GROUP_SOFTWARE = 0x1, |
d6f962b5 FW |
329 | }; |
330 | ||
e7e7ee2e IM |
331 | #define SWEVENT_HLIST_BITS 8 |
332 | #define SWEVENT_HLIST_SIZE (1 << SWEVENT_HLIST_BITS) | |
76e1d904 FW |
333 | |
334 | struct swevent_hlist { | |
e7e7ee2e IM |
335 | struct hlist_head heads[SWEVENT_HLIST_SIZE]; |
336 | struct rcu_head rcu_head; | |
76e1d904 FW |
337 | }; |
338 | ||
8a49542c PZ |
339 | #define PERF_ATTACH_CONTEXT 0x01 |
340 | #define PERF_ATTACH_GROUP 0x02 | |
d580ff86 | 341 | #define PERF_ATTACH_TASK 0x04 |
4af57ef2 | 342 | #define PERF_ATTACH_TASK_DATA 0x08 |
8a49542c | 343 | |
877c6856 | 344 | struct perf_cgroup; |
76369139 FW |
345 | struct ring_buffer; |
346 | ||
0793a61d | 347 | /** |
cdd6c482 | 348 | * struct perf_event - performance event kernel representation: |
0793a61d | 349 | */ |
cdd6c482 IM |
350 | struct perf_event { |
351 | #ifdef CONFIG_PERF_EVENTS | |
9886167d PZ |
352 | /* |
353 | * entry onto perf_event_context::event_list; | |
354 | * modifications require ctx->lock | |
355 | * RCU safe iterations. | |
356 | */ | |
592903cd | 357 | struct list_head event_entry; |
9886167d PZ |
358 | |
359 | /* | |
360 | * XXX: group_entry and sibling_list should be mutually exclusive; | |
361 | * either you're a sibling on a group, or you're the group leader. | |
362 | * Rework the code to always use the same list element. | |
363 | * | |
364 | * Locked for modification by both ctx->mutex and ctx->lock; holding | |
365 | * either sufficies for read. | |
366 | */ | |
367 | struct list_head group_entry; | |
04289bb9 | 368 | struct list_head sibling_list; |
9886167d PZ |
369 | |
370 | /* | |
371 | * We need storage to track the entries in perf_pmu_migrate_context; we | |
372 | * cannot use the event_entry because of RCU and we want to keep the | |
373 | * group in tact which avoids us using the other two entries. | |
374 | */ | |
375 | struct list_head migrate_entry; | |
376 | ||
f3ae75de SE |
377 | struct hlist_node hlist_entry; |
378 | struct list_head active_entry; | |
0127c3ea | 379 | int nr_siblings; |
d6f962b5 | 380 | int group_flags; |
cdd6c482 | 381 | struct perf_event *group_leader; |
a4eaf7f1 | 382 | struct pmu *pmu; |
04289bb9 | 383 | |
cdd6c482 | 384 | enum perf_event_active_state state; |
8a49542c | 385 | unsigned int attach_state; |
e7850595 | 386 | local64_t count; |
a6e6dea6 | 387 | atomic64_t child_count; |
ee06094f | 388 | |
53cfbf59 | 389 | /* |
cdd6c482 | 390 | * These are the total time in nanoseconds that the event |
53cfbf59 | 391 | * has been enabled (i.e. eligible to run, and the task has |
cdd6c482 | 392 | * been scheduled in, if this is a per-task event) |
53cfbf59 PM |
393 | * and running (scheduled onto the CPU), respectively. |
394 | * | |
395 | * They are computed from tstamp_enabled, tstamp_running and | |
cdd6c482 | 396 | * tstamp_stopped when the event is in INACTIVE or ACTIVE state. |
53cfbf59 PM |
397 | */ |
398 | u64 total_time_enabled; | |
399 | u64 total_time_running; | |
400 | ||
401 | /* | |
402 | * These are timestamps used for computing total_time_enabled | |
cdd6c482 | 403 | * and total_time_running when the event is in INACTIVE or |
53cfbf59 PM |
404 | * ACTIVE state, measured in nanoseconds from an arbitrary point |
405 | * in time. | |
cdd6c482 IM |
406 | * tstamp_enabled: the notional time when the event was enabled |
407 | * tstamp_running: the notional time when the event was scheduled on | |
53cfbf59 | 408 | * tstamp_stopped: in INACTIVE state, the notional time when the |
cdd6c482 | 409 | * event was scheduled off. |
53cfbf59 PM |
410 | */ |
411 | u64 tstamp_enabled; | |
412 | u64 tstamp_running; | |
413 | u64 tstamp_stopped; | |
414 | ||
eed01528 SE |
415 | /* |
416 | * timestamp shadows the actual context timing but it can | |
417 | * be safely used in NMI interrupt context. It reflects the | |
418 | * context time as it was when the event was last scheduled in. | |
419 | * | |
420 | * ctx_time already accounts for ctx->timestamp. Therefore to | |
421 | * compute ctx_time for a sample, simply add perf_clock(). | |
422 | */ | |
423 | u64 shadow_ctx_time; | |
424 | ||
24f1e32c | 425 | struct perf_event_attr attr; |
c320c7b7 | 426 | u16 header_size; |
6844c09d | 427 | u16 id_header_size; |
c320c7b7 | 428 | u16 read_size; |
cdd6c482 | 429 | struct hw_perf_event hw; |
0793a61d | 430 | |
cdd6c482 | 431 | struct perf_event_context *ctx; |
a6fa941d | 432 | atomic_long_t refcount; |
0793a61d | 433 | |
53cfbf59 PM |
434 | /* |
435 | * These accumulate total time (in nanoseconds) that children | |
cdd6c482 | 436 | * events have been enabled and running, respectively. |
53cfbf59 PM |
437 | */ |
438 | atomic64_t child_total_time_enabled; | |
439 | atomic64_t child_total_time_running; | |
440 | ||
0793a61d | 441 | /* |
d859e29f | 442 | * Protect attach/detach and child_list: |
0793a61d | 443 | */ |
fccc714b PZ |
444 | struct mutex child_mutex; |
445 | struct list_head child_list; | |
cdd6c482 | 446 | struct perf_event *parent; |
0793a61d TG |
447 | |
448 | int oncpu; | |
449 | int cpu; | |
450 | ||
082ff5a2 PZ |
451 | struct list_head owner_entry; |
452 | struct task_struct *owner; | |
453 | ||
7b732a75 PZ |
454 | /* mmap bits */ |
455 | struct mutex mmap_mutex; | |
456 | atomic_t mmap_count; | |
26cb63ad | 457 | |
76369139 | 458 | struct ring_buffer *rb; |
10c6db11 | 459 | struct list_head rb_entry; |
b69cf536 PZ |
460 | unsigned long rcu_batches; |
461 | int rcu_pending; | |
37d81828 | 462 | |
7b732a75 | 463 | /* poll related */ |
0793a61d | 464 | wait_queue_head_t waitq; |
3c446b3d | 465 | struct fasync_struct *fasync; |
79f14641 PZ |
466 | |
467 | /* delayed work for NMIs and such */ | |
468 | int pending_wakeup; | |
4c9e2542 | 469 | int pending_kill; |
79f14641 | 470 | int pending_disable; |
e360adbe | 471 | struct irq_work pending; |
592903cd | 472 | |
79f14641 PZ |
473 | atomic_t event_limit; |
474 | ||
cdd6c482 | 475 | void (*destroy)(struct perf_event *); |
592903cd | 476 | struct rcu_head rcu_head; |
709e50cf PZ |
477 | |
478 | struct pid_namespace *ns; | |
8e5799b1 | 479 | u64 id; |
6fb2915d | 480 | |
34f43927 | 481 | u64 (*clock)(void); |
b326e956 | 482 | perf_overflow_handler_t overflow_handler; |
4dc0da86 | 483 | void *overflow_handler_context; |
453f19ee | 484 | |
07b139c8 | 485 | #ifdef CONFIG_EVENT_TRACING |
2425bcb9 | 486 | struct trace_event_call *tp_event; |
6fb2915d | 487 | struct event_filter *filter; |
ced39002 JO |
488 | #ifdef CONFIG_FUNCTION_TRACER |
489 | struct ftrace_ops ftrace_ops; | |
490 | #endif | |
ee06094f | 491 | #endif |
6fb2915d | 492 | |
e5d1367f SE |
493 | #ifdef CONFIG_CGROUP_PERF |
494 | struct perf_cgroup *cgrp; /* cgroup event is attach to */ | |
495 | int cgrp_defer_enabled; | |
496 | #endif | |
497 | ||
6fb2915d | 498 | #endif /* CONFIG_PERF_EVENTS */ |
0793a61d TG |
499 | }; |
500 | ||
501 | /** | |
cdd6c482 | 502 | * struct perf_event_context - event context structure |
0793a61d | 503 | * |
cdd6c482 | 504 | * Used as a container for task events and CPU events as well: |
0793a61d | 505 | */ |
cdd6c482 | 506 | struct perf_event_context { |
108b02cf | 507 | struct pmu *pmu; |
0793a61d | 508 | /* |
cdd6c482 | 509 | * Protect the states of the events in the list, |
d859e29f | 510 | * nr_active, and the list: |
0793a61d | 511 | */ |
e625cce1 | 512 | raw_spinlock_t lock; |
d859e29f | 513 | /* |
cdd6c482 | 514 | * Protect the list of events. Locking either mutex or lock |
d859e29f PM |
515 | * is sufficient to ensure the list doesn't change; to change |
516 | * the list you need to lock both the mutex and the spinlock. | |
517 | */ | |
a308444c | 518 | struct mutex mutex; |
04289bb9 | 519 | |
2fde4f94 | 520 | struct list_head active_ctx_list; |
889ff015 FW |
521 | struct list_head pinned_groups; |
522 | struct list_head flexible_groups; | |
a308444c | 523 | struct list_head event_list; |
cdd6c482 | 524 | int nr_events; |
a308444c IM |
525 | int nr_active; |
526 | int is_active; | |
bfbd3381 | 527 | int nr_stat; |
0f5a2601 | 528 | int nr_freq; |
dddd3379 | 529 | int rotate_disable; |
a308444c IM |
530 | atomic_t refcount; |
531 | struct task_struct *task; | |
53cfbf59 PM |
532 | |
533 | /* | |
4af4998b | 534 | * Context clock, runs when context enabled. |
53cfbf59 | 535 | */ |
a308444c IM |
536 | u64 time; |
537 | u64 timestamp; | |
564c2b21 PM |
538 | |
539 | /* | |
540 | * These fields let us detect when two contexts have both | |
541 | * been cloned (inherited) from a common ancestor. | |
542 | */ | |
cdd6c482 | 543 | struct perf_event_context *parent_ctx; |
a308444c IM |
544 | u64 parent_gen; |
545 | u64 generation; | |
546 | int pin_count; | |
d010b332 | 547 | int nr_cgroups; /* cgroup evts */ |
4af57ef2 | 548 | void *task_ctx_data; /* pmu specific data */ |
28009ce4 | 549 | struct rcu_head rcu_head; |
fadfe7be JO |
550 | |
551 | struct delayed_work orphans_remove; | |
552 | bool orphans_remove_sched; | |
0793a61d TG |
553 | }; |
554 | ||
7ae07ea3 FW |
555 | /* |
556 | * Number of contexts where an event can trigger: | |
e7e7ee2e | 557 | * task, softirq, hardirq, nmi. |
7ae07ea3 FW |
558 | */ |
559 | #define PERF_NR_CONTEXTS 4 | |
560 | ||
0793a61d | 561 | /** |
cdd6c482 | 562 | * struct perf_event_cpu_context - per cpu event context structure |
0793a61d TG |
563 | */ |
564 | struct perf_cpu_context { | |
cdd6c482 IM |
565 | struct perf_event_context ctx; |
566 | struct perf_event_context *task_ctx; | |
0793a61d | 567 | int active_oncpu; |
3b6f9e5c | 568 | int exclusive; |
9e630205 SE |
569 | struct hrtimer hrtimer; |
570 | ktime_t hrtimer_interval; | |
3f1f3320 | 571 | struct pmu *unique_pmu; |
e5d1367f | 572 | struct perf_cgroup *cgrp; |
0793a61d TG |
573 | }; |
574 | ||
5622f295 | 575 | struct perf_output_handle { |
57c0c15b | 576 | struct perf_event *event; |
76369139 | 577 | struct ring_buffer *rb; |
6d1acfd5 | 578 | unsigned long wakeup; |
5d967a8b | 579 | unsigned long size; |
fdc26706 AS |
580 | union { |
581 | void *addr; | |
582 | unsigned long head; | |
583 | }; | |
5d967a8b | 584 | int page; |
5622f295 MM |
585 | }; |
586 | ||
39bed6cb MF |
587 | #ifdef CONFIG_CGROUP_PERF |
588 | ||
589 | /* | |
590 | * perf_cgroup_info keeps track of time_enabled for a cgroup. | |
591 | * This is a per-cpu dynamically allocated data structure. | |
592 | */ | |
593 | struct perf_cgroup_info { | |
594 | u64 time; | |
595 | u64 timestamp; | |
596 | }; | |
597 | ||
598 | struct perf_cgroup { | |
599 | struct cgroup_subsys_state css; | |
600 | struct perf_cgroup_info __percpu *info; | |
601 | }; | |
602 | ||
603 | /* | |
604 | * Must ensure cgroup is pinned (css_get) before calling | |
605 | * this function. In other words, we cannot call this function | |
606 | * if there is no cgroup event for the current CPU context. | |
607 | */ | |
608 | static inline struct perf_cgroup * | |
609 | perf_cgroup_from_task(struct task_struct *task) | |
610 | { | |
611 | return container_of(task_css(task, perf_event_cgrp_id), | |
612 | struct perf_cgroup, css); | |
613 | } | |
614 | #endif /* CONFIG_CGROUP_PERF */ | |
615 | ||
cdd6c482 | 616 | #ifdef CONFIG_PERF_EVENTS |
829b42dd | 617 | |
fdc26706 AS |
618 | extern void *perf_aux_output_begin(struct perf_output_handle *handle, |
619 | struct perf_event *event); | |
620 | extern void perf_aux_output_end(struct perf_output_handle *handle, | |
621 | unsigned long size, bool truncated); | |
622 | extern int perf_aux_output_skip(struct perf_output_handle *handle, | |
623 | unsigned long size); | |
624 | extern void *perf_get_aux(struct perf_output_handle *handle); | |
625 | ||
03d8e80b | 626 | extern int perf_pmu_register(struct pmu *pmu, const char *name, int type); |
b0a873eb | 627 | extern void perf_pmu_unregister(struct pmu *pmu); |
621a01ea | 628 | |
3bf101ba | 629 | extern int perf_num_counters(void); |
84c79910 | 630 | extern const char *perf_pmu_name(void); |
ab0cce56 JO |
631 | extern void __perf_event_task_sched_in(struct task_struct *prev, |
632 | struct task_struct *task); | |
633 | extern void __perf_event_task_sched_out(struct task_struct *prev, | |
634 | struct task_struct *next); | |
cdd6c482 IM |
635 | extern int perf_event_init_task(struct task_struct *child); |
636 | extern void perf_event_exit_task(struct task_struct *child); | |
637 | extern void perf_event_free_task(struct task_struct *task); | |
4e231c79 | 638 | extern void perf_event_delayed_put(struct task_struct *task); |
cdd6c482 | 639 | extern void perf_event_print_debug(void); |
33696fc0 PZ |
640 | extern void perf_pmu_disable(struct pmu *pmu); |
641 | extern void perf_pmu_enable(struct pmu *pmu); | |
ba532500 YZ |
642 | extern void perf_sched_cb_dec(struct pmu *pmu); |
643 | extern void perf_sched_cb_inc(struct pmu *pmu); | |
cdd6c482 IM |
644 | extern int perf_event_task_disable(void); |
645 | extern int perf_event_task_enable(void); | |
26ca5c11 | 646 | extern int perf_event_refresh(struct perf_event *event, int refresh); |
cdd6c482 | 647 | extern void perf_event_update_userpage(struct perf_event *event); |
fb0459d7 AV |
648 | extern int perf_event_release_kernel(struct perf_event *event); |
649 | extern struct perf_event * | |
650 | perf_event_create_kernel_counter(struct perf_event_attr *attr, | |
651 | int cpu, | |
38a81da2 | 652 | struct task_struct *task, |
4dc0da86 AK |
653 | perf_overflow_handler_t callback, |
654 | void *context); | |
0cda4c02 YZ |
655 | extern void perf_pmu_migrate_context(struct pmu *pmu, |
656 | int src_cpu, int dst_cpu); | |
59ed446f PZ |
657 | extern u64 perf_event_read_value(struct perf_event *event, |
658 | u64 *enabled, u64 *running); | |
5c92d124 | 659 | |
d010b332 | 660 | |
df1a132b | 661 | struct perf_sample_data { |
2565711f PZ |
662 | /* |
663 | * Fields set by perf_sample_data_init(), group so as to | |
664 | * minimize the cachelines touched. | |
665 | */ | |
666 | u64 addr; | |
667 | struct perf_raw_record *raw; | |
668 | struct perf_branch_stack *br_stack; | |
669 | u64 period; | |
670 | u64 weight; | |
671 | u64 txn; | |
672 | union perf_mem_data_src data_src; | |
5622f295 | 673 | |
2565711f PZ |
674 | /* |
675 | * The other fields, optionally {set,used} by | |
676 | * perf_{prepare,output}_sample(). | |
677 | */ | |
678 | u64 type; | |
5622f295 MM |
679 | u64 ip; |
680 | struct { | |
681 | u32 pid; | |
682 | u32 tid; | |
683 | } tid_entry; | |
684 | u64 time; | |
5622f295 MM |
685 | u64 id; |
686 | u64 stream_id; | |
687 | struct { | |
688 | u32 cpu; | |
689 | u32 reserved; | |
690 | } cpu_entry; | |
5622f295 | 691 | struct perf_callchain_entry *callchain; |
88a7c26a AL |
692 | |
693 | /* | |
694 | * regs_user may point to task_pt_regs or to regs_user_copy, depending | |
695 | * on arch details. | |
696 | */ | |
60e2364e | 697 | struct perf_regs regs_user; |
88a7c26a AL |
698 | struct pt_regs regs_user_copy; |
699 | ||
60e2364e | 700 | struct perf_regs regs_intr; |
c5ebcedb | 701 | u64 stack_user_size; |
2565711f | 702 | } ____cacheline_aligned; |
df1a132b | 703 | |
770eee1f SE |
704 | /* default value for data source */ |
705 | #define PERF_MEM_NA (PERF_MEM_S(OP, NA) |\ | |
706 | PERF_MEM_S(LVL, NA) |\ | |
707 | PERF_MEM_S(SNOOP, NA) |\ | |
708 | PERF_MEM_S(LOCK, NA) |\ | |
709 | PERF_MEM_S(TLB, NA)) | |
710 | ||
fd0d000b RR |
711 | static inline void perf_sample_data_init(struct perf_sample_data *data, |
712 | u64 addr, u64 period) | |
dc1d628a | 713 | { |
fd0d000b | 714 | /* remaining struct members initialized in perf_prepare_sample() */ |
dc1d628a PZ |
715 | data->addr = addr; |
716 | data->raw = NULL; | |
bce38cd5 | 717 | data->br_stack = NULL; |
4018994f | 718 | data->period = period; |
c3feedf2 | 719 | data->weight = 0; |
770eee1f | 720 | data->data_src.val = PERF_MEM_NA; |
fdfbbd07 | 721 | data->txn = 0; |
dc1d628a PZ |
722 | } |
723 | ||
5622f295 MM |
724 | extern void perf_output_sample(struct perf_output_handle *handle, |
725 | struct perf_event_header *header, | |
726 | struct perf_sample_data *data, | |
cdd6c482 | 727 | struct perf_event *event); |
5622f295 MM |
728 | extern void perf_prepare_sample(struct perf_event_header *header, |
729 | struct perf_sample_data *data, | |
cdd6c482 | 730 | struct perf_event *event, |
5622f295 MM |
731 | struct pt_regs *regs); |
732 | ||
a8b0ca17 | 733 | extern int perf_event_overflow(struct perf_event *event, |
5622f295 MM |
734 | struct perf_sample_data *data, |
735 | struct pt_regs *regs); | |
df1a132b | 736 | |
6c7e550f FBH |
737 | static inline bool is_sampling_event(struct perf_event *event) |
738 | { | |
739 | return event->attr.sample_period != 0; | |
740 | } | |
741 | ||
3b6f9e5c | 742 | /* |
cdd6c482 | 743 | * Return 1 for a software event, 0 for a hardware event |
3b6f9e5c | 744 | */ |
cdd6c482 | 745 | static inline int is_software_event(struct perf_event *event) |
3b6f9e5c | 746 | { |
89a1e187 | 747 | return event->pmu->task_ctx_nr == perf_sw_context; |
3b6f9e5c PM |
748 | } |
749 | ||
c5905afb | 750 | extern struct static_key perf_swevent_enabled[PERF_COUNT_SW_MAX]; |
f29ac756 | 751 | |
86038c5e | 752 | extern void ___perf_sw_event(u32, u64, struct pt_regs *, u64); |
a8b0ca17 | 753 | extern void __perf_sw_event(u32, u64, struct pt_regs *, u64); |
f29ac756 | 754 | |
b0f82b81 | 755 | #ifndef perf_arch_fetch_caller_regs |
e7e7ee2e | 756 | static inline void perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip) { } |
b0f82b81 | 757 | #endif |
5331d7b8 FW |
758 | |
759 | /* | |
760 | * Take a snapshot of the regs. Skip ip and frame pointer to | |
761 | * the nth caller. We only need a few of the regs: | |
762 | * - ip for PERF_SAMPLE_IP | |
763 | * - cs for user_mode() tests | |
764 | * - bp for callchains | |
765 | * - eflags, for future purposes, just in case | |
766 | */ | |
b0f82b81 | 767 | static inline void perf_fetch_caller_regs(struct pt_regs *regs) |
5331d7b8 | 768 | { |
5331d7b8 FW |
769 | memset(regs, 0, sizeof(*regs)); |
770 | ||
b0f82b81 | 771 | perf_arch_fetch_caller_regs(regs, CALLER_ADDR0); |
5331d7b8 FW |
772 | } |
773 | ||
7e54a5a0 | 774 | static __always_inline void |
a8b0ca17 | 775 | perf_sw_event(u32 event_id, u64 nr, struct pt_regs *regs, u64 addr) |
e49a5bd3 | 776 | { |
86038c5e PZI |
777 | if (static_key_false(&perf_swevent_enabled[event_id])) |
778 | __perf_sw_event(event_id, nr, regs, addr); | |
779 | } | |
780 | ||
781 | DECLARE_PER_CPU(struct pt_regs, __perf_regs[4]); | |
7e54a5a0 | 782 | |
86038c5e PZI |
783 | /* |
784 | * 'Special' version for the scheduler, it hard assumes no recursion, | |
785 | * which is guaranteed by us not actually scheduling inside other swevents | |
786 | * because those disable preemption. | |
787 | */ | |
788 | static __always_inline void | |
789 | perf_sw_event_sched(u32 event_id, u64 nr, u64 addr) | |
790 | { | |
c5905afb | 791 | if (static_key_false(&perf_swevent_enabled[event_id])) { |
86038c5e PZI |
792 | struct pt_regs *regs = this_cpu_ptr(&__perf_regs[0]); |
793 | ||
794 | perf_fetch_caller_regs(regs); | |
795 | ___perf_sw_event(event_id, nr, regs, addr); | |
e49a5bd3 FW |
796 | } |
797 | } | |
798 | ||
c5905afb | 799 | extern struct static_key_deferred perf_sched_events; |
ee6dcfa4 | 800 | |
ab0cce56 | 801 | static inline void perf_event_task_sched_in(struct task_struct *prev, |
a8d757ef | 802 | struct task_struct *task) |
ab0cce56 JO |
803 | { |
804 | if (static_key_false(&perf_sched_events.key)) | |
805 | __perf_event_task_sched_in(prev, task); | |
806 | } | |
807 | ||
808 | static inline void perf_event_task_sched_out(struct task_struct *prev, | |
809 | struct task_struct *next) | |
ee6dcfa4 | 810 | { |
86038c5e | 811 | perf_sw_event_sched(PERF_COUNT_SW_CONTEXT_SWITCHES, 1, 0); |
ee6dcfa4 | 812 | |
c5905afb | 813 | if (static_key_false(&perf_sched_events.key)) |
ab0cce56 | 814 | __perf_event_task_sched_out(prev, next); |
ee6dcfa4 PZ |
815 | } |
816 | ||
eacd3ecc MF |
817 | static inline u64 __perf_event_count(struct perf_event *event) |
818 | { | |
819 | return local64_read(&event->count) + atomic64_read(&event->child_count); | |
820 | } | |
821 | ||
3af9e859 | 822 | extern void perf_event_mmap(struct vm_area_struct *vma); |
39447b38 | 823 | extern struct perf_guest_info_callbacks *perf_guest_cbs; |
dcf46b94 ZY |
824 | extern int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks); |
825 | extern int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks); | |
39447b38 | 826 | |
e041e328 | 827 | extern void perf_event_exec(void); |
82b89778 | 828 | extern void perf_event_comm(struct task_struct *tsk, bool exec); |
cdd6c482 | 829 | extern void perf_event_fork(struct task_struct *tsk); |
8d1b2d93 | 830 | |
56962b44 FW |
831 | /* Callchains */ |
832 | DECLARE_PER_CPU(struct perf_callchain_entry, perf_callchain_entry); | |
833 | ||
e7e7ee2e IM |
834 | extern void perf_callchain_user(struct perf_callchain_entry *entry, struct pt_regs *regs); |
835 | extern void perf_callchain_kernel(struct perf_callchain_entry *entry, struct pt_regs *regs); | |
394ee076 | 836 | |
e7e7ee2e | 837 | static inline void perf_callchain_store(struct perf_callchain_entry *entry, u64 ip) |
70791ce9 FW |
838 | { |
839 | if (entry->nr < PERF_MAX_STACK_DEPTH) | |
840 | entry->ip[entry->nr++] = ip; | |
841 | } | |
394ee076 | 842 | |
cdd6c482 IM |
843 | extern int sysctl_perf_event_paranoid; |
844 | extern int sysctl_perf_event_mlock; | |
845 | extern int sysctl_perf_event_sample_rate; | |
14c63f17 DH |
846 | extern int sysctl_perf_cpu_time_max_percent; |
847 | ||
848 | extern void perf_sample_event_took(u64 sample_len_ns); | |
1ccd1549 | 849 | |
163ec435 PZ |
850 | extern int perf_proc_update_handler(struct ctl_table *table, int write, |
851 | void __user *buffer, size_t *lenp, | |
852 | loff_t *ppos); | |
14c63f17 DH |
853 | extern int perf_cpu_time_max_percent_handler(struct ctl_table *table, int write, |
854 | void __user *buffer, size_t *lenp, | |
855 | loff_t *ppos); | |
856 | ||
163ec435 | 857 | |
320ebf09 PZ |
858 | static inline bool perf_paranoid_tracepoint_raw(void) |
859 | { | |
860 | return sysctl_perf_event_paranoid > -1; | |
861 | } | |
862 | ||
863 | static inline bool perf_paranoid_cpu(void) | |
864 | { | |
865 | return sysctl_perf_event_paranoid > 0; | |
866 | } | |
867 | ||
868 | static inline bool perf_paranoid_kernel(void) | |
869 | { | |
870 | return sysctl_perf_event_paranoid > 1; | |
871 | } | |
872 | ||
cdd6c482 | 873 | extern void perf_event_init(void); |
1c024eca PZ |
874 | extern void perf_tp_event(u64 addr, u64 count, void *record, |
875 | int entry_size, struct pt_regs *regs, | |
e6dab5ff AV |
876 | struct hlist_head *head, int rctx, |
877 | struct task_struct *task); | |
24f1e32c | 878 | extern void perf_bp_event(struct perf_event *event, void *data); |
0d905bca | 879 | |
9d23a90a | 880 | #ifndef perf_misc_flags |
e7e7ee2e IM |
881 | # define perf_misc_flags(regs) \ |
882 | (user_mode(regs) ? PERF_RECORD_MISC_USER : PERF_RECORD_MISC_KERNEL) | |
883 | # define perf_instruction_pointer(regs) instruction_pointer(regs) | |
9d23a90a PM |
884 | #endif |
885 | ||
bce38cd5 SE |
886 | static inline bool has_branch_stack(struct perf_event *event) |
887 | { | |
888 | return event->attr.sample_type & PERF_SAMPLE_BRANCH_STACK; | |
a46a2300 YZ |
889 | } |
890 | ||
891 | static inline bool needs_branch_stack(struct perf_event *event) | |
892 | { | |
893 | return event->attr.branch_sample_type != 0; | |
bce38cd5 SE |
894 | } |
895 | ||
45bfb2e5 PZ |
896 | static inline bool has_aux(struct perf_event *event) |
897 | { | |
898 | return event->pmu->setup_aux; | |
899 | } | |
900 | ||
5622f295 | 901 | extern int perf_output_begin(struct perf_output_handle *handle, |
a7ac67ea | 902 | struct perf_event *event, unsigned int size); |
5622f295 | 903 | extern void perf_output_end(struct perf_output_handle *handle); |
91d7753a | 904 | extern unsigned int perf_output_copy(struct perf_output_handle *handle, |
5622f295 | 905 | const void *buf, unsigned int len); |
5685e0ff JO |
906 | extern unsigned int perf_output_skip(struct perf_output_handle *handle, |
907 | unsigned int len); | |
4ed7c92d PZ |
908 | extern int perf_swevent_get_recursion_context(void); |
909 | extern void perf_swevent_put_recursion_context(int rctx); | |
ab573844 | 910 | extern u64 perf_swevent_set_period(struct perf_event *event); |
44234adc FW |
911 | extern void perf_event_enable(struct perf_event *event); |
912 | extern void perf_event_disable(struct perf_event *event); | |
500ad2d8 | 913 | extern int __perf_event_disable(void *info); |
e9d2b064 | 914 | extern void perf_event_task_tick(void); |
e041e328 | 915 | #else /* !CONFIG_PERF_EVENTS: */ |
fdc26706 AS |
916 | static inline void * |
917 | perf_aux_output_begin(struct perf_output_handle *handle, | |
918 | struct perf_event *event) { return NULL; } | |
919 | static inline void | |
920 | perf_aux_output_end(struct perf_output_handle *handle, unsigned long size, | |
921 | bool truncated) { } | |
922 | static inline int | |
923 | perf_aux_output_skip(struct perf_output_handle *handle, | |
924 | unsigned long size) { return -EINVAL; } | |
925 | static inline void * | |
926 | perf_get_aux(struct perf_output_handle *handle) { return NULL; } | |
0793a61d | 927 | static inline void |
ab0cce56 JO |
928 | perf_event_task_sched_in(struct task_struct *prev, |
929 | struct task_struct *task) { } | |
930 | static inline void | |
931 | perf_event_task_sched_out(struct task_struct *prev, | |
932 | struct task_struct *next) { } | |
cdd6c482 IM |
933 | static inline int perf_event_init_task(struct task_struct *child) { return 0; } |
934 | static inline void perf_event_exit_task(struct task_struct *child) { } | |
935 | static inline void perf_event_free_task(struct task_struct *task) { } | |
4e231c79 | 936 | static inline void perf_event_delayed_put(struct task_struct *task) { } |
57c0c15b | 937 | static inline void perf_event_print_debug(void) { } |
57c0c15b IM |
938 | static inline int perf_event_task_disable(void) { return -EINVAL; } |
939 | static inline int perf_event_task_enable(void) { return -EINVAL; } | |
26ca5c11 AK |
940 | static inline int perf_event_refresh(struct perf_event *event, int refresh) |
941 | { | |
942 | return -EINVAL; | |
943 | } | |
15dbf27c | 944 | |
925d519a | 945 | static inline void |
a8b0ca17 | 946 | perf_sw_event(u32 event_id, u64 nr, struct pt_regs *regs, u64 addr) { } |
24f1e32c | 947 | static inline void |
86038c5e PZI |
948 | perf_sw_event_sched(u32 event_id, u64 nr, u64 addr) { } |
949 | static inline void | |
184f412c | 950 | perf_bp_event(struct perf_event *event, void *data) { } |
0a4a9391 | 951 | |
39447b38 | 952 | static inline int perf_register_guest_info_callbacks |
e7e7ee2e | 953 | (struct perf_guest_info_callbacks *callbacks) { return 0; } |
39447b38 | 954 | static inline int perf_unregister_guest_info_callbacks |
e7e7ee2e | 955 | (struct perf_guest_info_callbacks *callbacks) { return 0; } |
39447b38 | 956 | |
57c0c15b | 957 | static inline void perf_event_mmap(struct vm_area_struct *vma) { } |
e041e328 | 958 | static inline void perf_event_exec(void) { } |
82b89778 | 959 | static inline void perf_event_comm(struct task_struct *tsk, bool exec) { } |
cdd6c482 IM |
960 | static inline void perf_event_fork(struct task_struct *tsk) { } |
961 | static inline void perf_event_init(void) { } | |
184f412c | 962 | static inline int perf_swevent_get_recursion_context(void) { return -1; } |
4ed7c92d | 963 | static inline void perf_swevent_put_recursion_context(int rctx) { } |
ab573844 | 964 | static inline u64 perf_swevent_set_period(struct perf_event *event) { return 0; } |
44234adc FW |
965 | static inline void perf_event_enable(struct perf_event *event) { } |
966 | static inline void perf_event_disable(struct perf_event *event) { } | |
500ad2d8 | 967 | static inline int __perf_event_disable(void *info) { return -1; } |
e9d2b064 | 968 | static inline void perf_event_task_tick(void) { } |
0793a61d TG |
969 | #endif |
970 | ||
026249ef FW |
971 | #if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_NO_HZ_FULL) |
972 | extern bool perf_event_can_stop_tick(void); | |
973 | #else | |
974 | static inline bool perf_event_can_stop_tick(void) { return true; } | |
975 | #endif | |
976 | ||
6c4d3bc9 DR |
977 | #if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_CPU_SUP_INTEL) |
978 | extern void perf_restore_debug_store(void); | |
979 | #else | |
1d9d8639 | 980 | static inline void perf_restore_debug_store(void) { } |
0793a61d TG |
981 | #endif |
982 | ||
e7e7ee2e | 983 | #define perf_output_put(handle, x) perf_output_copy((handle), &(x), sizeof(x)) |
5622f295 | 984 | |
3f6da390 | 985 | /* |
0a0fca9d | 986 | * This has to have a higher priority than migration_notifier in sched/core.c. |
3f6da390 | 987 | */ |
e7e7ee2e IM |
988 | #define perf_cpu_notifier(fn) \ |
989 | do { \ | |
0db0628d | 990 | static struct notifier_block fn##_nb = \ |
e7e7ee2e | 991 | { .notifier_call = fn, .priority = CPU_PRI_PERF }; \ |
c13d38e4 | 992 | unsigned long cpu = smp_processor_id(); \ |
6760bca9 | 993 | unsigned long flags; \ |
f0bdb5e0 SB |
994 | \ |
995 | cpu_notifier_register_begin(); \ | |
e7e7ee2e | 996 | fn(&fn##_nb, (unsigned long)CPU_UP_PREPARE, \ |
c13d38e4 | 997 | (void *)(unsigned long)cpu); \ |
6760bca9 | 998 | local_irq_save(flags); \ |
e7e7ee2e | 999 | fn(&fn##_nb, (unsigned long)CPU_STARTING, \ |
c13d38e4 | 1000 | (void *)(unsigned long)cpu); \ |
6760bca9 | 1001 | local_irq_restore(flags); \ |
e7e7ee2e | 1002 | fn(&fn##_nb, (unsigned long)CPU_ONLINE, \ |
c13d38e4 | 1003 | (void *)(unsigned long)cpu); \ |
f0bdb5e0 SB |
1004 | __register_cpu_notifier(&fn##_nb); \ |
1005 | cpu_notifier_register_done(); \ | |
3f6da390 PZ |
1006 | } while (0) |
1007 | ||
f0bdb5e0 SB |
1008 | /* |
1009 | * Bare-bones version of perf_cpu_notifier(), which doesn't invoke the | |
1010 | * callback for already online CPUs. | |
1011 | */ | |
1012 | #define __perf_cpu_notifier(fn) \ | |
1013 | do { \ | |
1014 | static struct notifier_block fn##_nb = \ | |
1015 | { .notifier_call = fn, .priority = CPU_PRI_PERF }; \ | |
1016 | \ | |
1017 | __register_cpu_notifier(&fn##_nb); \ | |
1018 | } while (0) | |
641cc938 | 1019 | |
2663960c SB |
1020 | struct perf_pmu_events_attr { |
1021 | struct device_attribute attr; | |
1022 | u64 id; | |
3a54aaa0 | 1023 | const char *event_str; |
2663960c SB |
1024 | }; |
1025 | ||
fd979c01 CS |
1026 | ssize_t perf_event_sysfs_show(struct device *dev, struct device_attribute *attr, |
1027 | char *page); | |
1028 | ||
2663960c SB |
1029 | #define PMU_EVENT_ATTR(_name, _var, _id, _show) \ |
1030 | static struct perf_pmu_events_attr _var = { \ | |
1031 | .attr = __ATTR(_name, 0444, _show, NULL), \ | |
1032 | .id = _id, \ | |
1033 | }; | |
1034 | ||
f0405b81 CS |
1035 | #define PMU_EVENT_ATTR_STRING(_name, _var, _str) \ |
1036 | static struct perf_pmu_events_attr _var = { \ | |
1037 | .attr = __ATTR(_name, 0444, perf_event_sysfs_show, NULL), \ | |
1038 | .id = 0, \ | |
1039 | .event_str = _str, \ | |
1040 | }; | |
1041 | ||
641cc938 JO |
1042 | #define PMU_FORMAT_ATTR(_name, _format) \ |
1043 | static ssize_t \ | |
1044 | _name##_show(struct device *dev, \ | |
1045 | struct device_attribute *attr, \ | |
1046 | char *page) \ | |
1047 | { \ | |
1048 | BUILD_BUG_ON(sizeof(_format) >= PAGE_SIZE); \ | |
1049 | return sprintf(page, _format "\n"); \ | |
1050 | } \ | |
1051 | \ | |
1052 | static struct device_attribute format_attr_##_name = __ATTR_RO(_name) | |
1053 | ||
cdd6c482 | 1054 | #endif /* _LINUX_PERF_EVENT_H */ |