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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> |
c895f6f7 | 18 | #include <uapi/linux/bpf_perf_event.h> |
0793a61d | 19 | |
9f66a381 | 20 | /* |
f3dfd265 | 21 | * Kernel-internal data types and definitions: |
9f66a381 IM |
22 | */ |
23 | ||
cdd6c482 IM |
24 | #ifdef CONFIG_PERF_EVENTS |
25 | # include <asm/perf_event.h> | |
7be79236 | 26 | # include <asm/local64.h> |
f3dfd265 PM |
27 | #endif |
28 | ||
39447b38 | 29 | struct perf_guest_info_callbacks { |
e7e7ee2e IM |
30 | int (*is_in_guest)(void); |
31 | int (*is_user_mode)(void); | |
32 | unsigned long (*get_guest_ip)(void); | |
8479e04e | 33 | void (*handle_intel_pt_intr)(void); |
39447b38 ZY |
34 | }; |
35 | ||
2ff6cfd7 AB |
36 | #ifdef CONFIG_HAVE_HW_BREAKPOINT |
37 | #include <asm/hw_breakpoint.h> | |
38 | #endif | |
39 | ||
f3dfd265 PM |
40 | #include <linux/list.h> |
41 | #include <linux/mutex.h> | |
42 | #include <linux/rculist.h> | |
43 | #include <linux/rcupdate.h> | |
44 | #include <linux/spinlock.h> | |
d6d020e9 | 45 | #include <linux/hrtimer.h> |
3c446b3d | 46 | #include <linux/fs.h> |
709e50cf | 47 | #include <linux/pid_namespace.h> |
906010b2 | 48 | #include <linux/workqueue.h> |
5331d7b8 | 49 | #include <linux/ftrace.h> |
85cfabbc | 50 | #include <linux/cpu.h> |
e360adbe | 51 | #include <linux/irq_work.h> |
c5905afb | 52 | #include <linux/static_key.h> |
851cf6e7 | 53 | #include <linux/jump_label_ratelimit.h> |
60063497 | 54 | #include <linux/atomic.h> |
641cc938 | 55 | #include <linux/sysfs.h> |
4018994f | 56 | #include <linux/perf_regs.h> |
39bed6cb | 57 | #include <linux/cgroup.h> |
8c94abbb | 58 | #include <linux/refcount.h> |
da97e184 | 59 | #include <linux/security.h> |
fa588151 | 60 | #include <asm/local.h> |
f3dfd265 | 61 | |
f9188e02 PZ |
62 | struct perf_callchain_entry { |
63 | __u64 nr; | |
c50c75e9 | 64 | __u64 ip[]; /* /proc/sys/kernel/perf_event_max_stack */ |
f9188e02 PZ |
65 | }; |
66 | ||
cfbcf468 ACM |
67 | struct perf_callchain_entry_ctx { |
68 | struct perf_callchain_entry *entry; | |
69 | u32 max_stack; | |
3b1fff08 | 70 | u32 nr; |
c85b0334 ACM |
71 | short contexts; |
72 | bool contexts_maxed; | |
cfbcf468 ACM |
73 | }; |
74 | ||
7e3f977e | 75 | typedef unsigned long (*perf_copy_f)(void *dst, const void *src, |
aa7145c1 | 76 | unsigned long off, unsigned long len); |
7e3f977e DB |
77 | |
78 | struct perf_raw_frag { | |
79 | union { | |
80 | struct perf_raw_frag *next; | |
81 | unsigned long pad; | |
82 | }; | |
83 | perf_copy_f copy; | |
84 | void *data; | |
85 | u32 size; | |
86 | } __packed; | |
87 | ||
3a43ce68 | 88 | struct perf_raw_record { |
7e3f977e | 89 | struct perf_raw_frag frag; |
3a43ce68 | 90 | u32 size; |
f413cdb8 FW |
91 | }; |
92 | ||
bce38cd5 SE |
93 | /* |
94 | * branch stack layout: | |
95 | * nr: number of taken branches stored in entries[] | |
bbfd5e4f KL |
96 | * hw_idx: The low level index of raw branch records |
97 | * for the most recent branch. | |
98 | * -1ULL means invalid/unknown. | |
bce38cd5 SE |
99 | * |
100 | * Note that nr can vary from sample to sample | |
101 | * branches (to, from) are stored from most recent | |
102 | * to least recent, i.e., entries[0] contains the most | |
103 | * recent branch. | |
bbfd5e4f KL |
104 | * The entries[] is an abstraction of raw branch records, |
105 | * which may not be stored in age order in HW, e.g. Intel LBR. | |
106 | * The hw_idx is to expose the low level index of raw | |
107 | * branch record for the most recent branch aka entries[0]. | |
108 | * The hw_idx index is between -1 (unknown) and max depth, | |
109 | * which can be retrieved in /sys/devices/cpu/caps/branches. | |
110 | * For the architectures whose raw branch records are | |
111 | * already stored in age order, the hw_idx should be 0. | |
bce38cd5 | 112 | */ |
caff2bef PZ |
113 | struct perf_branch_stack { |
114 | __u64 nr; | |
bbfd5e4f | 115 | __u64 hw_idx; |
c50c75e9 | 116 | struct perf_branch_entry entries[]; |
caff2bef PZ |
117 | }; |
118 | ||
f3dfd265 PM |
119 | struct task_struct; |
120 | ||
efc9f05d SE |
121 | /* |
122 | * extra PMU register associated with an event | |
123 | */ | |
124 | struct hw_perf_event_extra { | |
125 | u64 config; /* register value */ | |
126 | unsigned int reg; /* register address or index */ | |
127 | int alloc; /* extra register already allocated */ | |
128 | int idx; /* index in shared_regs->regs[] */ | |
129 | }; | |
130 | ||
0793a61d | 131 | /** |
cdd6c482 | 132 | * struct hw_perf_event - performance event hardware details: |
0793a61d | 133 | */ |
cdd6c482 IM |
134 | struct hw_perf_event { |
135 | #ifdef CONFIG_PERF_EVENTS | |
d6d020e9 PZ |
136 | union { |
137 | struct { /* hardware */ | |
a308444c | 138 | u64 config; |
447a194b | 139 | u64 last_tag; |
a308444c | 140 | unsigned long config_base; |
cdd6c482 | 141 | unsigned long event_base; |
c48b6053 | 142 | int event_base_rdpmc; |
a308444c | 143 | int idx; |
447a194b | 144 | int last_cpu; |
9fac2cf3 | 145 | int flags; |
bce38cd5 | 146 | |
efc9f05d | 147 | struct hw_perf_event_extra extra_reg; |
bce38cd5 | 148 | struct hw_perf_event_extra branch_reg; |
d6d020e9 | 149 | }; |
721a669b | 150 | struct { /* software */ |
a308444c | 151 | struct hrtimer hrtimer; |
d6d020e9 | 152 | }; |
f22c1bb6 | 153 | struct { /* tracepoint */ |
f22c1bb6 ON |
154 | /* for tp_event->class */ |
155 | struct list_head tp_list; | |
156 | }; | |
c7ab62bf HR |
157 | struct { /* amd_power */ |
158 | u64 pwr_acc; | |
159 | u64 ptsc; | |
160 | }; | |
24f1e32c | 161 | #ifdef CONFIG_HAVE_HW_BREAKPOINT |
45a73372 | 162 | struct { /* breakpoint */ |
d580ff86 PZ |
163 | /* |
164 | * Crufty hack to avoid the chicken and egg | |
165 | * problem hw_breakpoint has with context | |
166 | * creation and event initalization. | |
167 | */ | |
f22c1bb6 ON |
168 | struct arch_hw_breakpoint info; |
169 | struct list_head bp_list; | |
45a73372 | 170 | }; |
24f1e32c | 171 | #endif |
cf25f904 SS |
172 | struct { /* amd_iommu */ |
173 | u8 iommu_bank; | |
174 | u8 iommu_cntr; | |
175 | u16 padding; | |
176 | u64 conf; | |
177 | u64 conf1; | |
178 | }; | |
d6d020e9 | 179 | }; |
b0e87875 PZ |
180 | /* |
181 | * If the event is a per task event, this will point to the task in | |
182 | * question. See the comment in perf_event_alloc(). | |
183 | */ | |
50f16a8b | 184 | struct task_struct *target; |
b0e87875 | 185 | |
375637bc AS |
186 | /* |
187 | * PMU would store hardware filter configuration | |
188 | * here. | |
189 | */ | |
190 | void *addr_filters; | |
191 | ||
192 | /* Last sync'ed generation of filters */ | |
193 | unsigned long addr_filters_gen; | |
194 | ||
b0e87875 PZ |
195 | /* |
196 | * hw_perf_event::state flags; used to track the PERF_EF_* state. | |
197 | */ | |
198 | #define PERF_HES_STOPPED 0x01 /* the counter is stopped */ | |
199 | #define PERF_HES_UPTODATE 0x02 /* event->count up-to-date */ | |
200 | #define PERF_HES_ARCH 0x04 | |
201 | ||
a4eaf7f1 | 202 | int state; |
b0e87875 PZ |
203 | |
204 | /* | |
205 | * The last observed hardware counter value, updated with a | |
206 | * local64_cmpxchg() such that pmu::read() can be called nested. | |
207 | */ | |
e7850595 | 208 | local64_t prev_count; |
b0e87875 PZ |
209 | |
210 | /* | |
211 | * The period to start the next sample with. | |
212 | */ | |
b23f3325 | 213 | u64 sample_period; |
b0e87875 | 214 | |
2cb5383b KL |
215 | union { |
216 | struct { /* Sampling */ | |
217 | /* | |
218 | * The period we started this sample with. | |
219 | */ | |
220 | u64 last_period; | |
b0e87875 | 221 | |
2cb5383b KL |
222 | /* |
223 | * However much is left of the current period; | |
224 | * note that this is a full 64bit value and | |
225 | * allows for generation of periods longer | |
226 | * than hardware might allow. | |
227 | */ | |
228 | local64_t period_left; | |
229 | }; | |
230 | struct { /* Topdown events counting for context switch */ | |
231 | u64 saved_metric; | |
232 | u64 saved_slots; | |
233 | }; | |
234 | }; | |
b0e87875 PZ |
235 | |
236 | /* | |
237 | * State for throttling the event, see __perf_event_overflow() and | |
238 | * perf_adjust_freq_unthr_context(). | |
239 | */ | |
e050e3f0 | 240 | u64 interrupts_seq; |
60db5e09 | 241 | u64 interrupts; |
6a24ed6c | 242 | |
b0e87875 PZ |
243 | /* |
244 | * State for freq target events, see __perf_event_overflow() and | |
245 | * perf_adjust_freq_unthr_context(). | |
246 | */ | |
abd50713 PZ |
247 | u64 freq_time_stamp; |
248 | u64 freq_count_stamp; | |
ee06094f | 249 | #endif |
0793a61d TG |
250 | }; |
251 | ||
cdd6c482 | 252 | struct perf_event; |
621a01ea | 253 | |
8d2cacbb PZ |
254 | /* |
255 | * Common implementation detail of pmu::{start,commit,cancel}_txn | |
256 | */ | |
fbbe0701 | 257 | #define PERF_PMU_TXN_ADD 0x1 /* txn to add/schedule event on PMU */ |
4a00c16e | 258 | #define PERF_PMU_TXN_READ 0x2 /* txn to read event group from PMU */ |
fbbe0701 | 259 | |
53b25335 VW |
260 | /** |
261 | * pmu::capabilities flags | |
262 | */ | |
55bcf6ef KL |
263 | #define PERF_PMU_CAP_NO_INTERRUPT 0x0001 |
264 | #define PERF_PMU_CAP_NO_NMI 0x0002 | |
265 | #define PERF_PMU_CAP_AUX_NO_SG 0x0004 | |
266 | #define PERF_PMU_CAP_EXTENDED_REGS 0x0008 | |
267 | #define PERF_PMU_CAP_EXCLUSIVE 0x0010 | |
268 | #define PERF_PMU_CAP_ITRACE 0x0020 | |
269 | #define PERF_PMU_CAP_HETEROGENEOUS_CPUS 0x0040 | |
270 | #define PERF_PMU_CAP_NO_EXCLUDE 0x0080 | |
271 | #define PERF_PMU_CAP_AUX_OUTPUT 0x0100 | |
272 | #define PERF_PMU_CAP_EXTENDED_HW_TYPE 0x0200 | |
53b25335 | 273 | |
a4faf00d AS |
274 | struct perf_output_handle; |
275 | ||
621a01ea | 276 | /** |
4aeb0b42 | 277 | * struct pmu - generic performance monitoring unit |
621a01ea | 278 | */ |
4aeb0b42 | 279 | struct pmu { |
b0a873eb PZ |
280 | struct list_head entry; |
281 | ||
c464c76e | 282 | struct module *module; |
abe43400 | 283 | struct device *dev; |
0c9d42ed | 284 | const struct attribute_group **attr_groups; |
f3a3a825 | 285 | const struct attribute_group **attr_update; |
03d8e80b | 286 | const char *name; |
2e80a82a PZ |
287 | int type; |
288 | ||
53b25335 VW |
289 | /* |
290 | * various common per-pmu feature flags | |
291 | */ | |
292 | int capabilities; | |
293 | ||
43b9e4fe MO |
294 | int __percpu *pmu_disable_count; |
295 | struct perf_cpu_context __percpu *pmu_cpu_context; | |
bed5b25a | 296 | atomic_t exclusive_cnt; /* < 0: cpu; > 0: tsk */ |
8dc85d54 | 297 | int task_ctx_nr; |
62b85639 | 298 | int hrtimer_interval_ms; |
6bde9b6c | 299 | |
375637bc AS |
300 | /* number of address filters this PMU can do */ |
301 | unsigned int nr_addr_filters; | |
302 | ||
6bde9b6c | 303 | /* |
a4eaf7f1 PZ |
304 | * Fully disable/enable this PMU, can be used to protect from the PMI |
305 | * as well as for lazy/batch writing of the MSRs. | |
6bde9b6c | 306 | */ |
ad5133b7 PZ |
307 | void (*pmu_enable) (struct pmu *pmu); /* optional */ |
308 | void (*pmu_disable) (struct pmu *pmu); /* optional */ | |
6bde9b6c | 309 | |
8d2cacbb | 310 | /* |
a4eaf7f1 | 311 | * Try and initialize the event for this PMU. |
b0e87875 PZ |
312 | * |
313 | * Returns: | |
314 | * -ENOENT -- @event is not for this PMU | |
315 | * | |
316 | * -ENODEV -- @event is for this PMU but PMU not present | |
317 | * -EBUSY -- @event is for this PMU but PMU temporarily unavailable | |
318 | * -EINVAL -- @event is for this PMU but @event is not valid | |
319 | * -EOPNOTSUPP -- @event is for this PMU, @event is valid, but not supported | |
652521d4 | 320 | * -EACCES -- @event is for this PMU, @event is valid, but no privileges |
b0e87875 PZ |
321 | * |
322 | * 0 -- @event is for this PMU and valid | |
323 | * | |
324 | * Other error return values are allowed. | |
8d2cacbb | 325 | */ |
b0a873eb PZ |
326 | int (*event_init) (struct perf_event *event); |
327 | ||
1e0fb9ec AL |
328 | /* |
329 | * Notification that the event was mapped or unmapped. Called | |
330 | * in the context of the mapping task. | |
331 | */ | |
bfe33492 PZ |
332 | void (*event_mapped) (struct perf_event *event, struct mm_struct *mm); /* optional */ |
333 | void (*event_unmapped) (struct perf_event *event, struct mm_struct *mm); /* optional */ | |
1e0fb9ec | 334 | |
b0e87875 PZ |
335 | /* |
336 | * Flags for ->add()/->del()/ ->start()/->stop(). There are | |
337 | * matching hw_perf_event::state flags. | |
338 | */ | |
a4eaf7f1 PZ |
339 | #define PERF_EF_START 0x01 /* start the counter when adding */ |
340 | #define PERF_EF_RELOAD 0x02 /* reload the counter when starting */ | |
341 | #define PERF_EF_UPDATE 0x04 /* update the counter when stopping */ | |
342 | ||
8d2cacbb | 343 | /* |
b0e87875 PZ |
344 | * Adds/Removes a counter to/from the PMU, can be done inside a |
345 | * transaction, see the ->*_txn() methods. | |
346 | * | |
347 | * The add/del callbacks will reserve all hardware resources required | |
348 | * to service the event, this includes any counter constraint | |
349 | * scheduling etc. | |
350 | * | |
351 | * Called with IRQs disabled and the PMU disabled on the CPU the event | |
352 | * is on. | |
353 | * | |
354 | * ->add() called without PERF_EF_START should result in the same state | |
355 | * as ->add() followed by ->stop(). | |
356 | * | |
357 | * ->del() must always PERF_EF_UPDATE stop an event. If it calls | |
358 | * ->stop() that must deal with already being stopped without | |
359 | * PERF_EF_UPDATE. | |
a4eaf7f1 PZ |
360 | */ |
361 | int (*add) (struct perf_event *event, int flags); | |
362 | void (*del) (struct perf_event *event, int flags); | |
363 | ||
364 | /* | |
b0e87875 PZ |
365 | * Starts/Stops a counter present on the PMU. |
366 | * | |
367 | * The PMI handler should stop the counter when perf_event_overflow() | |
368 | * returns !0. ->start() will be used to continue. | |
369 | * | |
370 | * Also used to change the sample period. | |
371 | * | |
372 | * Called with IRQs disabled and the PMU disabled on the CPU the event | |
373 | * is on -- will be called from NMI context with the PMU generates | |
374 | * NMIs. | |
375 | * | |
376 | * ->stop() with PERF_EF_UPDATE will read the counter and update | |
377 | * period/count values like ->read() would. | |
378 | * | |
c2127e14 | 379 | * ->start() with PERF_EF_RELOAD will reprogram the counter |
b0e87875 | 380 | * value, must be preceded by a ->stop() with PERF_EF_UPDATE. |
a4eaf7f1 PZ |
381 | */ |
382 | void (*start) (struct perf_event *event, int flags); | |
383 | void (*stop) (struct perf_event *event, int flags); | |
384 | ||
385 | /* | |
386 | * Updates the counter value of the event. | |
b0e87875 PZ |
387 | * |
388 | * For sampling capable PMUs this will also update the software period | |
389 | * hw_perf_event::period_left field. | |
a4eaf7f1 | 390 | */ |
cdd6c482 | 391 | void (*read) (struct perf_event *event); |
6bde9b6c LM |
392 | |
393 | /* | |
24cd7f54 PZ |
394 | * Group events scheduling is treated as a transaction, add |
395 | * group events as a whole and perform one schedulability test. | |
396 | * If the test fails, roll back the whole group | |
a4eaf7f1 PZ |
397 | * |
398 | * Start the transaction, after this ->add() doesn't need to | |
24cd7f54 | 399 | * do schedulability tests. |
fbbe0701 SB |
400 | * |
401 | * Optional. | |
8d2cacbb | 402 | */ |
fbbe0701 | 403 | void (*start_txn) (struct pmu *pmu, unsigned int txn_flags); |
8d2cacbb | 404 | /* |
a4eaf7f1 | 405 | * If ->start_txn() disabled the ->add() schedulability test |
8d2cacbb PZ |
406 | * then ->commit_txn() is required to perform one. On success |
407 | * the transaction is closed. On error the transaction is kept | |
408 | * open until ->cancel_txn() is called. | |
fbbe0701 SB |
409 | * |
410 | * Optional. | |
8d2cacbb | 411 | */ |
fbbe0701 | 412 | int (*commit_txn) (struct pmu *pmu); |
8d2cacbb | 413 | /* |
a4eaf7f1 | 414 | * Will cancel the transaction, assumes ->del() is called |
25985edc | 415 | * for each successful ->add() during the transaction. |
fbbe0701 SB |
416 | * |
417 | * Optional. | |
8d2cacbb | 418 | */ |
fbbe0701 | 419 | void (*cancel_txn) (struct pmu *pmu); |
35edc2a5 PZ |
420 | |
421 | /* | |
422 | * Will return the value for perf_event_mmap_page::index for this event, | |
423 | * if no implementation is provided it will default to: event->hw.idx + 1. | |
424 | */ | |
425 | int (*event_idx) (struct perf_event *event); /*optional */ | |
d010b332 | 426 | |
ba532500 YZ |
427 | /* |
428 | * context-switches callback | |
429 | */ | |
430 | void (*sched_task) (struct perf_event_context *ctx, | |
431 | bool sched_in); | |
432 | ||
217c2a63 KL |
433 | /* |
434 | * Kmem cache of PMU specific data | |
435 | */ | |
436 | struct kmem_cache *task_ctx_cache; | |
437 | ||
fc1adfe3 AB |
438 | /* |
439 | * PMU specific parts of task perf event context (i.e. ctx->task_ctx_data) | |
440 | * can be synchronized using this function. See Intel LBR callstack support | |
441 | * implementation and Perf core context switch handling callbacks for usage | |
442 | * examples. | |
443 | */ | |
444 | void (*swap_task_ctx) (struct perf_event_context *prev, | |
445 | struct perf_event_context *next); | |
446 | /* optional */ | |
eacd3ecc | 447 | |
45bfb2e5 PZ |
448 | /* |
449 | * Set up pmu-private data structures for an AUX area | |
450 | */ | |
84001866 | 451 | void *(*setup_aux) (struct perf_event *event, void **pages, |
45bfb2e5 PZ |
452 | int nr_pages, bool overwrite); |
453 | /* optional */ | |
454 | ||
455 | /* | |
456 | * Free pmu-private AUX data structures | |
457 | */ | |
458 | void (*free_aux) (void *aux); /* optional */ | |
66eb579e | 459 | |
a4faf00d AS |
460 | /* |
461 | * Take a snapshot of the AUX buffer without touching the event | |
462 | * state, so that preempting ->start()/->stop() callbacks does | |
463 | * not interfere with their logic. Called in PMI context. | |
464 | * | |
465 | * Returns the size of AUX data copied to the output handle. | |
466 | * | |
467 | * Optional. | |
468 | */ | |
469 | long (*snapshot_aux) (struct perf_event *event, | |
470 | struct perf_output_handle *handle, | |
471 | unsigned long size); | |
472 | ||
375637bc AS |
473 | /* |
474 | * Validate address range filters: make sure the HW supports the | |
475 | * requested configuration and number of filters; return 0 if the | |
476 | * supplied filters are valid, -errno otherwise. | |
477 | * | |
478 | * Runs in the context of the ioctl()ing process and is not serialized | |
479 | * with the rest of the PMU callbacks. | |
480 | */ | |
481 | int (*addr_filters_validate) (struct list_head *filters); | |
482 | /* optional */ | |
483 | ||
484 | /* | |
485 | * Synchronize address range filter configuration: | |
486 | * translate hw-agnostic filters into hardware configuration in | |
487 | * event::hw::addr_filters. | |
488 | * | |
489 | * Runs as a part of filter sync sequence that is done in ->start() | |
490 | * callback by calling perf_event_addr_filters_sync(). | |
491 | * | |
492 | * May (and should) traverse event::addr_filters::list, for which its | |
493 | * caller provides necessary serialization. | |
494 | */ | |
495 | void (*addr_filters_sync) (struct perf_event *event); | |
496 | /* optional */ | |
497 | ||
ab43762e AS |
498 | /* |
499 | * Check if event can be used for aux_output purposes for | |
500 | * events of this PMU. | |
501 | * | |
502 | * Runs from perf_event_open(). Should return 0 for "no match" | |
503 | * or non-zero for "match". | |
504 | */ | |
505 | int (*aux_output_match) (struct perf_event *event); | |
506 | /* optional */ | |
507 | ||
66eb579e MR |
508 | /* |
509 | * Filter events for PMU-specific reasons. | |
510 | */ | |
511 | int (*filter_match) (struct perf_event *event); /* optional */ | |
81ec3f3c JO |
512 | |
513 | /* | |
514 | * Check period value for PERF_EVENT_IOC_PERIOD ioctl. | |
515 | */ | |
516 | int (*check_period) (struct perf_event *event, u64 value); /* optional */ | |
621a01ea IM |
517 | }; |
518 | ||
6ed70cf3 AS |
519 | enum perf_addr_filter_action_t { |
520 | PERF_ADDR_FILTER_ACTION_STOP = 0, | |
521 | PERF_ADDR_FILTER_ACTION_START, | |
522 | PERF_ADDR_FILTER_ACTION_FILTER, | |
523 | }; | |
524 | ||
375637bc AS |
525 | /** |
526 | * struct perf_addr_filter - address range filter definition | |
527 | * @entry: event's filter list linkage | |
1279e41d | 528 | * @path: object file's path for file-based filters |
375637bc | 529 | * @offset: filter range offset |
6ed70cf3 AS |
530 | * @size: filter range size (size==0 means single address trigger) |
531 | * @action: filter/start/stop | |
375637bc AS |
532 | * |
533 | * This is a hardware-agnostic filter configuration as specified by the user. | |
534 | */ | |
535 | struct perf_addr_filter { | |
536 | struct list_head entry; | |
9511bce9 | 537 | struct path path; |
375637bc AS |
538 | unsigned long offset; |
539 | unsigned long size; | |
6ed70cf3 | 540 | enum perf_addr_filter_action_t action; |
375637bc AS |
541 | }; |
542 | ||
543 | /** | |
544 | * struct perf_addr_filters_head - container for address range filters | |
545 | * @list: list of filters for this event | |
546 | * @lock: spinlock that serializes accesses to the @list and event's | |
547 | * (and its children's) filter generations. | |
6ce77bfd | 548 | * @nr_file_filters: number of file-based filters |
375637bc AS |
549 | * |
550 | * A child event will use parent's @list (and therefore @lock), so they are | |
551 | * bundled together; see perf_event_addr_filters(). | |
552 | */ | |
553 | struct perf_addr_filters_head { | |
554 | struct list_head list; | |
555 | raw_spinlock_t lock; | |
6ce77bfd | 556 | unsigned int nr_file_filters; |
375637bc AS |
557 | }; |
558 | ||
c60f83b8 AS |
559 | struct perf_addr_filter_range { |
560 | unsigned long start; | |
561 | unsigned long size; | |
562 | }; | |
563 | ||
6a930700 | 564 | /** |
788faab7 | 565 | * enum perf_event_state - the states of an event: |
6a930700 | 566 | */ |
8ca2bd41 | 567 | enum perf_event_state { |
a69b0ca4 | 568 | PERF_EVENT_STATE_DEAD = -4, |
179033b3 | 569 | PERF_EVENT_STATE_EXIT = -3, |
57c0c15b | 570 | PERF_EVENT_STATE_ERROR = -2, |
cdd6c482 IM |
571 | PERF_EVENT_STATE_OFF = -1, |
572 | PERF_EVENT_STATE_INACTIVE = 0, | |
57c0c15b | 573 | PERF_EVENT_STATE_ACTIVE = 1, |
6a930700 IM |
574 | }; |
575 | ||
9b51f66d | 576 | struct file; |
453f19ee PZ |
577 | struct perf_sample_data; |
578 | ||
a8b0ca17 | 579 | typedef void (*perf_overflow_handler_t)(struct perf_event *, |
b326e956 FW |
580 | struct perf_sample_data *, |
581 | struct pt_regs *regs); | |
582 | ||
4ff6a8de DCC |
583 | /* |
584 | * Event capabilities. For event_caps and groups caps. | |
585 | * | |
586 | * PERF_EV_CAP_SOFTWARE: Is a software event. | |
d6a2f903 DCC |
587 | * PERF_EV_CAP_READ_ACTIVE_PKG: A CPU event (or cgroup event) that can be read |
588 | * from any CPU in the package where it is active. | |
9f0c4fa1 KL |
589 | * PERF_EV_CAP_SIBLING: An event with this flag must be a group sibling and |
590 | * cannot be a group leader. If an event with this flag is detached from the | |
591 | * group it is scheduled out and moved into an unrecoverable ERROR state. | |
4ff6a8de DCC |
592 | */ |
593 | #define PERF_EV_CAP_SOFTWARE BIT(0) | |
d6a2f903 | 594 | #define PERF_EV_CAP_READ_ACTIVE_PKG BIT(1) |
9f0c4fa1 | 595 | #define PERF_EV_CAP_SIBLING BIT(2) |
d6f962b5 | 596 | |
e7e7ee2e IM |
597 | #define SWEVENT_HLIST_BITS 8 |
598 | #define SWEVENT_HLIST_SIZE (1 << SWEVENT_HLIST_BITS) | |
76e1d904 FW |
599 | |
600 | struct swevent_hlist { | |
e7e7ee2e IM |
601 | struct hlist_head heads[SWEVENT_HLIST_SIZE]; |
602 | struct rcu_head rcu_head; | |
76e1d904 FW |
603 | }; |
604 | ||
8a49542c PZ |
605 | #define PERF_ATTACH_CONTEXT 0x01 |
606 | #define PERF_ATTACH_GROUP 0x02 | |
d580ff86 | 607 | #define PERF_ATTACH_TASK 0x04 |
4af57ef2 | 608 | #define PERF_ATTACH_TASK_DATA 0x08 |
8d4e6c4c | 609 | #define PERF_ATTACH_ITRACE 0x10 |
a5398bff | 610 | #define PERF_ATTACH_SCHED_CB 0x20 |
ef54c1a4 | 611 | #define PERF_ATTACH_CHILD 0x40 |
8a49542c | 612 | |
877c6856 | 613 | struct perf_cgroup; |
56de4e8f | 614 | struct perf_buffer; |
76369139 | 615 | |
f2fb6bef KL |
616 | struct pmu_event_list { |
617 | raw_spinlock_t lock; | |
618 | struct list_head list; | |
619 | }; | |
620 | ||
edb39592 PZ |
621 | #define for_each_sibling_event(sibling, event) \ |
622 | if ((event)->group_leader == (event)) \ | |
623 | list_for_each_entry((sibling), &(event)->sibling_list, sibling_list) | |
624 | ||
0793a61d | 625 | /** |
cdd6c482 | 626 | * struct perf_event - performance event kernel representation: |
0793a61d | 627 | */ |
cdd6c482 IM |
628 | struct perf_event { |
629 | #ifdef CONFIG_PERF_EVENTS | |
9886167d PZ |
630 | /* |
631 | * entry onto perf_event_context::event_list; | |
632 | * modifications require ctx->lock | |
633 | * RCU safe iterations. | |
634 | */ | |
592903cd | 635 | struct list_head event_entry; |
9886167d PZ |
636 | |
637 | /* | |
9886167d PZ |
638 | * Locked for modification by both ctx->mutex and ctx->lock; holding |
639 | * either sufficies for read. | |
640 | */ | |
04289bb9 | 641 | struct list_head sibling_list; |
6668128a | 642 | struct list_head active_list; |
8e1a2031 AB |
643 | /* |
644 | * Node on the pinned or flexible tree located at the event context; | |
645 | */ | |
646 | struct rb_node group_node; | |
647 | u64 group_index; | |
9886167d PZ |
648 | /* |
649 | * We need storage to track the entries in perf_pmu_migrate_context; we | |
650 | * cannot use the event_entry because of RCU and we want to keep the | |
651 | * group in tact which avoids us using the other two entries. | |
652 | */ | |
653 | struct list_head migrate_entry; | |
654 | ||
f3ae75de SE |
655 | struct hlist_node hlist_entry; |
656 | struct list_head active_entry; | |
0127c3ea | 657 | int nr_siblings; |
4ff6a8de DCC |
658 | |
659 | /* Not serialized. Only written during event initialization. */ | |
660 | int event_caps; | |
661 | /* The cumulative AND of all event_caps for events in this group. */ | |
662 | int group_caps; | |
663 | ||
cdd6c482 | 664 | struct perf_event *group_leader; |
a4eaf7f1 | 665 | struct pmu *pmu; |
54d751d4 | 666 | void *pmu_private; |
04289bb9 | 667 | |
8ca2bd41 | 668 | enum perf_event_state state; |
8a49542c | 669 | unsigned int attach_state; |
e7850595 | 670 | local64_t count; |
a6e6dea6 | 671 | atomic64_t child_count; |
ee06094f | 672 | |
53cfbf59 | 673 | /* |
cdd6c482 | 674 | * These are the total time in nanoseconds that the event |
53cfbf59 | 675 | * has been enabled (i.e. eligible to run, and the task has |
cdd6c482 | 676 | * been scheduled in, if this is a per-task event) |
53cfbf59 | 677 | * and running (scheduled onto the CPU), respectively. |
53cfbf59 PM |
678 | */ |
679 | u64 total_time_enabled; | |
680 | u64 total_time_running; | |
0d3d73aa | 681 | u64 tstamp; |
53cfbf59 | 682 | |
eed01528 SE |
683 | /* |
684 | * timestamp shadows the actual context timing but it can | |
685 | * be safely used in NMI interrupt context. It reflects the | |
686 | * context time as it was when the event was last scheduled in. | |
687 | * | |
688 | * ctx_time already accounts for ctx->timestamp. Therefore to | |
689 | * compute ctx_time for a sample, simply add perf_clock(). | |
690 | */ | |
691 | u64 shadow_ctx_time; | |
692 | ||
24f1e32c | 693 | struct perf_event_attr attr; |
c320c7b7 | 694 | u16 header_size; |
6844c09d | 695 | u16 id_header_size; |
c320c7b7 | 696 | u16 read_size; |
cdd6c482 | 697 | struct hw_perf_event hw; |
0793a61d | 698 | |
cdd6c482 | 699 | struct perf_event_context *ctx; |
a6fa941d | 700 | atomic_long_t refcount; |
0793a61d | 701 | |
53cfbf59 PM |
702 | /* |
703 | * These accumulate total time (in nanoseconds) that children | |
cdd6c482 | 704 | * events have been enabled and running, respectively. |
53cfbf59 PM |
705 | */ |
706 | atomic64_t child_total_time_enabled; | |
707 | atomic64_t child_total_time_running; | |
708 | ||
0793a61d | 709 | /* |
d859e29f | 710 | * Protect attach/detach and child_list: |
0793a61d | 711 | */ |
fccc714b PZ |
712 | struct mutex child_mutex; |
713 | struct list_head child_list; | |
cdd6c482 | 714 | struct perf_event *parent; |
0793a61d TG |
715 | |
716 | int oncpu; | |
717 | int cpu; | |
718 | ||
082ff5a2 PZ |
719 | struct list_head owner_entry; |
720 | struct task_struct *owner; | |
721 | ||
7b732a75 PZ |
722 | /* mmap bits */ |
723 | struct mutex mmap_mutex; | |
724 | atomic_t mmap_count; | |
26cb63ad | 725 | |
56de4e8f | 726 | struct perf_buffer *rb; |
10c6db11 | 727 | struct list_head rb_entry; |
b69cf536 PZ |
728 | unsigned long rcu_batches; |
729 | int rcu_pending; | |
37d81828 | 730 | |
7b732a75 | 731 | /* poll related */ |
0793a61d | 732 | wait_queue_head_t waitq; |
3c446b3d | 733 | struct fasync_struct *fasync; |
79f14641 PZ |
734 | |
735 | /* delayed work for NMIs and such */ | |
736 | int pending_wakeup; | |
4c9e2542 | 737 | int pending_kill; |
79f14641 | 738 | int pending_disable; |
97ba62b2 | 739 | unsigned long pending_addr; /* SIGTRAP */ |
e360adbe | 740 | struct irq_work pending; |
592903cd | 741 | |
79f14641 PZ |
742 | atomic_t event_limit; |
743 | ||
375637bc AS |
744 | /* address range filters */ |
745 | struct perf_addr_filters_head addr_filters; | |
746 | /* vma address array for file-based filders */ | |
c60f83b8 | 747 | struct perf_addr_filter_range *addr_filter_ranges; |
375637bc AS |
748 | unsigned long addr_filters_gen; |
749 | ||
ab43762e AS |
750 | /* for aux_output events */ |
751 | struct perf_event *aux_event; | |
752 | ||
cdd6c482 | 753 | void (*destroy)(struct perf_event *); |
592903cd | 754 | struct rcu_head rcu_head; |
709e50cf PZ |
755 | |
756 | struct pid_namespace *ns; | |
8e5799b1 | 757 | u64 id; |
6fb2915d | 758 | |
34f43927 | 759 | u64 (*clock)(void); |
b326e956 | 760 | perf_overflow_handler_t overflow_handler; |
4dc0da86 | 761 | void *overflow_handler_context; |
aa6a5f3c AS |
762 | #ifdef CONFIG_BPF_SYSCALL |
763 | perf_overflow_handler_t orig_overflow_handler; | |
764 | struct bpf_prog *prog; | |
765 | #endif | |
453f19ee | 766 | |
07b139c8 | 767 | #ifdef CONFIG_EVENT_TRACING |
2425bcb9 | 768 | struct trace_event_call *tp_event; |
6fb2915d | 769 | struct event_filter *filter; |
ced39002 JO |
770 | #ifdef CONFIG_FUNCTION_TRACER |
771 | struct ftrace_ops ftrace_ops; | |
772 | #endif | |
ee06094f | 773 | #endif |
6fb2915d | 774 | |
e5d1367f SE |
775 | #ifdef CONFIG_CGROUP_PERF |
776 | struct perf_cgroup *cgrp; /* cgroup event is attach to */ | |
e5d1367f SE |
777 | #endif |
778 | ||
da97e184 JFG |
779 | #ifdef CONFIG_SECURITY |
780 | void *security; | |
781 | #endif | |
f2fb6bef | 782 | struct list_head sb_list; |
6fb2915d | 783 | #endif /* CONFIG_PERF_EVENTS */ |
0793a61d TG |
784 | }; |
785 | ||
8e1a2031 AB |
786 | |
787 | struct perf_event_groups { | |
788 | struct rb_root tree; | |
789 | u64 index; | |
790 | }; | |
791 | ||
0793a61d | 792 | /** |
cdd6c482 | 793 | * struct perf_event_context - event context structure |
0793a61d | 794 | * |
cdd6c482 | 795 | * Used as a container for task events and CPU events as well: |
0793a61d | 796 | */ |
cdd6c482 | 797 | struct perf_event_context { |
108b02cf | 798 | struct pmu *pmu; |
0793a61d | 799 | /* |
cdd6c482 | 800 | * Protect the states of the events in the list, |
d859e29f | 801 | * nr_active, and the list: |
0793a61d | 802 | */ |
e625cce1 | 803 | raw_spinlock_t lock; |
d859e29f | 804 | /* |
cdd6c482 | 805 | * Protect the list of events. Locking either mutex or lock |
d859e29f PM |
806 | * is sufficient to ensure the list doesn't change; to change |
807 | * the list you need to lock both the mutex and the spinlock. | |
808 | */ | |
a308444c | 809 | struct mutex mutex; |
04289bb9 | 810 | |
2fde4f94 | 811 | struct list_head active_ctx_list; |
8e1a2031 AB |
812 | struct perf_event_groups pinned_groups; |
813 | struct perf_event_groups flexible_groups; | |
a308444c | 814 | struct list_head event_list; |
6668128a PZ |
815 | |
816 | struct list_head pinned_active; | |
817 | struct list_head flexible_active; | |
818 | ||
cdd6c482 | 819 | int nr_events; |
a308444c IM |
820 | int nr_active; |
821 | int is_active; | |
bfbd3381 | 822 | int nr_stat; |
0f5a2601 | 823 | int nr_freq; |
dddd3379 | 824 | int rotate_disable; |
fd7d5517 IR |
825 | /* |
826 | * Set when nr_events != nr_active, except tolerant to events not | |
827 | * necessary to be active due to scheduling constraints, such as cgroups. | |
828 | */ | |
829 | int rotate_necessary; | |
8c94abbb | 830 | refcount_t refcount; |
a308444c | 831 | struct task_struct *task; |
53cfbf59 PM |
832 | |
833 | /* | |
4af4998b | 834 | * Context clock, runs when context enabled. |
53cfbf59 | 835 | */ |
a308444c IM |
836 | u64 time; |
837 | u64 timestamp; | |
564c2b21 PM |
838 | |
839 | /* | |
840 | * These fields let us detect when two contexts have both | |
841 | * been cloned (inherited) from a common ancestor. | |
842 | */ | |
cdd6c482 | 843 | struct perf_event_context *parent_ctx; |
a308444c IM |
844 | u64 parent_gen; |
845 | u64 generation; | |
846 | int pin_count; | |
db4a8356 | 847 | #ifdef CONFIG_CGROUP_PERF |
d010b332 | 848 | int nr_cgroups; /* cgroup evts */ |
db4a8356 | 849 | #endif |
4af57ef2 | 850 | void *task_ctx_data; /* pmu specific data */ |
28009ce4 | 851 | struct rcu_head rcu_head; |
0793a61d TG |
852 | }; |
853 | ||
7ae07ea3 FW |
854 | /* |
855 | * Number of contexts where an event can trigger: | |
e7e7ee2e | 856 | * task, softirq, hardirq, nmi. |
7ae07ea3 FW |
857 | */ |
858 | #define PERF_NR_CONTEXTS 4 | |
859 | ||
0793a61d | 860 | /** |
cdd6c482 | 861 | * struct perf_event_cpu_context - per cpu event context structure |
0793a61d TG |
862 | */ |
863 | struct perf_cpu_context { | |
cdd6c482 IM |
864 | struct perf_event_context ctx; |
865 | struct perf_event_context *task_ctx; | |
0793a61d | 866 | int active_oncpu; |
3b6f9e5c | 867 | int exclusive; |
4cfafd30 PZ |
868 | |
869 | raw_spinlock_t hrtimer_lock; | |
9e630205 SE |
870 | struct hrtimer hrtimer; |
871 | ktime_t hrtimer_interval; | |
4cfafd30 PZ |
872 | unsigned int hrtimer_active; |
873 | ||
db4a8356 | 874 | #ifdef CONFIG_CGROUP_PERF |
e5d1367f | 875 | struct perf_cgroup *cgrp; |
058fe1c0 | 876 | struct list_head cgrp_cpuctx_entry; |
db4a8356 | 877 | #endif |
e48c1788 | 878 | |
a5398bff | 879 | struct list_head sched_cb_entry; |
e48c1788 | 880 | int sched_cb_usage; |
a63fbed7 TG |
881 | |
882 | int online; | |
836196be IR |
883 | /* |
884 | * Per-CPU storage for iterators used in visit_groups_merge. The default | |
885 | * storage is of size 2 to hold the CPU and any CPU event iterators. | |
886 | */ | |
887 | int heap_size; | |
888 | struct perf_event **heap; | |
889 | struct perf_event *heap_default[2]; | |
0793a61d TG |
890 | }; |
891 | ||
5622f295 | 892 | struct perf_output_handle { |
57c0c15b | 893 | struct perf_event *event; |
56de4e8f | 894 | struct perf_buffer *rb; |
6d1acfd5 | 895 | unsigned long wakeup; |
5d967a8b | 896 | unsigned long size; |
f4c0b0aa | 897 | u64 aux_flags; |
fdc26706 AS |
898 | union { |
899 | void *addr; | |
900 | unsigned long head; | |
901 | }; | |
5d967a8b | 902 | int page; |
5622f295 MM |
903 | }; |
904 | ||
0515e599 | 905 | struct bpf_perf_event_data_kern { |
c895f6f7 | 906 | bpf_user_pt_regs_t *regs; |
0515e599 | 907 | struct perf_sample_data *data; |
7d9285e8 | 908 | struct perf_event *event; |
0515e599 AS |
909 | }; |
910 | ||
39bed6cb MF |
911 | #ifdef CONFIG_CGROUP_PERF |
912 | ||
913 | /* | |
914 | * perf_cgroup_info keeps track of time_enabled for a cgroup. | |
915 | * This is a per-cpu dynamically allocated data structure. | |
916 | */ | |
917 | struct perf_cgroup_info { | |
918 | u64 time; | |
919 | u64 timestamp; | |
920 | }; | |
921 | ||
922 | struct perf_cgroup { | |
923 | struct cgroup_subsys_state css; | |
924 | struct perf_cgroup_info __percpu *info; | |
925 | }; | |
926 | ||
927 | /* | |
928 | * Must ensure cgroup is pinned (css_get) before calling | |
929 | * this function. In other words, we cannot call this function | |
930 | * if there is no cgroup event for the current CPU context. | |
931 | */ | |
932 | static inline struct perf_cgroup * | |
614e4c4e | 933 | perf_cgroup_from_task(struct task_struct *task, struct perf_event_context *ctx) |
39bed6cb | 934 | { |
614e4c4e SE |
935 | return container_of(task_css_check(task, perf_event_cgrp_id, |
936 | ctx ? lockdep_is_held(&ctx->lock) | |
937 | : true), | |
39bed6cb MF |
938 | struct perf_cgroup, css); |
939 | } | |
940 | #endif /* CONFIG_CGROUP_PERF */ | |
941 | ||
cdd6c482 | 942 | #ifdef CONFIG_PERF_EVENTS |
829b42dd | 943 | |
fdc26706 AS |
944 | extern void *perf_aux_output_begin(struct perf_output_handle *handle, |
945 | struct perf_event *event); | |
946 | extern void perf_aux_output_end(struct perf_output_handle *handle, | |
f4c0b0aa | 947 | unsigned long size); |
fdc26706 AS |
948 | extern int perf_aux_output_skip(struct perf_output_handle *handle, |
949 | unsigned long size); | |
950 | extern void *perf_get_aux(struct perf_output_handle *handle); | |
f4c0b0aa | 951 | extern void perf_aux_output_flag(struct perf_output_handle *handle, u64 flags); |
8d4e6c4c | 952 | extern void perf_event_itrace_started(struct perf_event *event); |
fdc26706 | 953 | |
03d8e80b | 954 | extern int perf_pmu_register(struct pmu *pmu, const char *name, int type); |
b0a873eb | 955 | extern void perf_pmu_unregister(struct pmu *pmu); |
621a01ea | 956 | |
ab0cce56 JO |
957 | extern void __perf_event_task_sched_in(struct task_struct *prev, |
958 | struct task_struct *task); | |
959 | extern void __perf_event_task_sched_out(struct task_struct *prev, | |
960 | struct task_struct *next); | |
2b26f0aa | 961 | extern int perf_event_init_task(struct task_struct *child, u64 clone_flags); |
cdd6c482 IM |
962 | extern void perf_event_exit_task(struct task_struct *child); |
963 | extern void perf_event_free_task(struct task_struct *task); | |
4e231c79 | 964 | extern void perf_event_delayed_put(struct task_struct *task); |
e03e7ee3 | 965 | extern struct file *perf_event_get(unsigned int fd); |
f8d959a5 | 966 | extern const struct perf_event *perf_get_event(struct file *file); |
ffe8690c | 967 | extern const struct perf_event_attr *perf_event_attrs(struct perf_event *event); |
cdd6c482 | 968 | extern void perf_event_print_debug(void); |
33696fc0 PZ |
969 | extern void perf_pmu_disable(struct pmu *pmu); |
970 | extern void perf_pmu_enable(struct pmu *pmu); | |
ba532500 YZ |
971 | extern void perf_sched_cb_dec(struct pmu *pmu); |
972 | extern void perf_sched_cb_inc(struct pmu *pmu); | |
cdd6c482 IM |
973 | extern int perf_event_task_disable(void); |
974 | extern int perf_event_task_enable(void); | |
c68d224e SE |
975 | |
976 | extern void perf_pmu_resched(struct pmu *pmu); | |
977 | ||
26ca5c11 | 978 | extern int perf_event_refresh(struct perf_event *event, int refresh); |
cdd6c482 | 979 | extern void perf_event_update_userpage(struct perf_event *event); |
fb0459d7 AV |
980 | extern int perf_event_release_kernel(struct perf_event *event); |
981 | extern struct perf_event * | |
982 | perf_event_create_kernel_counter(struct perf_event_attr *attr, | |
983 | int cpu, | |
38a81da2 | 984 | struct task_struct *task, |
4dc0da86 AK |
985 | perf_overflow_handler_t callback, |
986 | void *context); | |
0cda4c02 YZ |
987 | extern void perf_pmu_migrate_context(struct pmu *pmu, |
988 | int src_cpu, int dst_cpu); | |
7d9285e8 YS |
989 | int perf_event_read_local(struct perf_event *event, u64 *value, |
990 | u64 *enabled, u64 *running); | |
59ed446f PZ |
991 | extern u64 perf_event_read_value(struct perf_event *event, |
992 | u64 *enabled, u64 *running); | |
5c92d124 | 993 | |
d010b332 | 994 | |
df1a132b | 995 | struct perf_sample_data { |
2565711f PZ |
996 | /* |
997 | * Fields set by perf_sample_data_init(), group so as to | |
998 | * minimize the cachelines touched. | |
999 | */ | |
1000 | u64 addr; | |
1001 | struct perf_raw_record *raw; | |
1002 | struct perf_branch_stack *br_stack; | |
1003 | u64 period; | |
2a6c6b7d | 1004 | union perf_sample_weight weight; |
2565711f PZ |
1005 | u64 txn; |
1006 | union perf_mem_data_src data_src; | |
5622f295 | 1007 | |
2565711f PZ |
1008 | /* |
1009 | * The other fields, optionally {set,used} by | |
1010 | * perf_{prepare,output}_sample(). | |
1011 | */ | |
1012 | u64 type; | |
5622f295 MM |
1013 | u64 ip; |
1014 | struct { | |
1015 | u32 pid; | |
1016 | u32 tid; | |
1017 | } tid_entry; | |
1018 | u64 time; | |
5622f295 MM |
1019 | u64 id; |
1020 | u64 stream_id; | |
1021 | struct { | |
1022 | u32 cpu; | |
1023 | u32 reserved; | |
1024 | } cpu_entry; | |
5622f295 | 1025 | struct perf_callchain_entry *callchain; |
a4faf00d | 1026 | u64 aux_size; |
88a7c26a | 1027 | |
60e2364e SE |
1028 | struct perf_regs regs_user; |
1029 | struct perf_regs regs_intr; | |
c5ebcedb | 1030 | u64 stack_user_size; |
fc7ce9c7 KL |
1031 | |
1032 | u64 phys_addr; | |
6546b19f | 1033 | u64 cgroup; |
8d97e718 | 1034 | u64 data_page_size; |
995f088e | 1035 | u64 code_page_size; |
2565711f | 1036 | } ____cacheline_aligned; |
df1a132b | 1037 | |
770eee1f SE |
1038 | /* default value for data source */ |
1039 | #define PERF_MEM_NA (PERF_MEM_S(OP, NA) |\ | |
1040 | PERF_MEM_S(LVL, NA) |\ | |
1041 | PERF_MEM_S(SNOOP, NA) |\ | |
1042 | PERF_MEM_S(LOCK, NA) |\ | |
1043 | PERF_MEM_S(TLB, NA)) | |
1044 | ||
fd0d000b RR |
1045 | static inline void perf_sample_data_init(struct perf_sample_data *data, |
1046 | u64 addr, u64 period) | |
dc1d628a | 1047 | { |
fd0d000b | 1048 | /* remaining struct members initialized in perf_prepare_sample() */ |
dc1d628a PZ |
1049 | data->addr = addr; |
1050 | data->raw = NULL; | |
bce38cd5 | 1051 | data->br_stack = NULL; |
4018994f | 1052 | data->period = period; |
2a6c6b7d | 1053 | data->weight.full = 0; |
770eee1f | 1054 | data->data_src.val = PERF_MEM_NA; |
fdfbbd07 | 1055 | data->txn = 0; |
dc1d628a PZ |
1056 | } |
1057 | ||
5622f295 MM |
1058 | extern void perf_output_sample(struct perf_output_handle *handle, |
1059 | struct perf_event_header *header, | |
1060 | struct perf_sample_data *data, | |
cdd6c482 | 1061 | struct perf_event *event); |
5622f295 MM |
1062 | extern void perf_prepare_sample(struct perf_event_header *header, |
1063 | struct perf_sample_data *data, | |
cdd6c482 | 1064 | struct perf_event *event, |
5622f295 MM |
1065 | struct pt_regs *regs); |
1066 | ||
a8b0ca17 | 1067 | extern int perf_event_overflow(struct perf_event *event, |
5622f295 MM |
1068 | struct perf_sample_data *data, |
1069 | struct pt_regs *regs); | |
df1a132b | 1070 | |
9ecda41a WN |
1071 | extern void perf_event_output_forward(struct perf_event *event, |
1072 | struct perf_sample_data *data, | |
1073 | struct pt_regs *regs); | |
1074 | extern void perf_event_output_backward(struct perf_event *event, | |
1075 | struct perf_sample_data *data, | |
1076 | struct pt_regs *regs); | |
56201969 ACM |
1077 | extern int perf_event_output(struct perf_event *event, |
1078 | struct perf_sample_data *data, | |
1079 | struct pt_regs *regs); | |
21509084 | 1080 | |
1879445d WN |
1081 | static inline bool |
1082 | is_default_overflow_handler(struct perf_event *event) | |
1083 | { | |
9ecda41a WN |
1084 | if (likely(event->overflow_handler == perf_event_output_forward)) |
1085 | return true; | |
1086 | if (unlikely(event->overflow_handler == perf_event_output_backward)) | |
1087 | return true; | |
1088 | return false; | |
1879445d WN |
1089 | } |
1090 | ||
21509084 YZ |
1091 | extern void |
1092 | perf_event_header__init_id(struct perf_event_header *header, | |
1093 | struct perf_sample_data *data, | |
1094 | struct perf_event *event); | |
1095 | extern void | |
1096 | perf_event__output_id_sample(struct perf_event *event, | |
1097 | struct perf_output_handle *handle, | |
1098 | struct perf_sample_data *sample); | |
1099 | ||
f38b0dbb KL |
1100 | extern void |
1101 | perf_log_lost_samples(struct perf_event *event, u64 lost); | |
1102 | ||
486efe9f AM |
1103 | static inline bool event_has_any_exclude_flag(struct perf_event *event) |
1104 | { | |
1105 | struct perf_event_attr *attr = &event->attr; | |
1106 | ||
1107 | return attr->exclude_idle || attr->exclude_user || | |
1108 | attr->exclude_kernel || attr->exclude_hv || | |
1109 | attr->exclude_guest || attr->exclude_host; | |
1110 | } | |
1111 | ||
6c7e550f FBH |
1112 | static inline bool is_sampling_event(struct perf_event *event) |
1113 | { | |
1114 | return event->attr.sample_period != 0; | |
1115 | } | |
1116 | ||
3b6f9e5c | 1117 | /* |
cdd6c482 | 1118 | * Return 1 for a software event, 0 for a hardware event |
3b6f9e5c | 1119 | */ |
cdd6c482 | 1120 | static inline int is_software_event(struct perf_event *event) |
3b6f9e5c | 1121 | { |
4ff6a8de | 1122 | return event->event_caps & PERF_EV_CAP_SOFTWARE; |
3b6f9e5c PM |
1123 | } |
1124 | ||
a1150c20 SL |
1125 | /* |
1126 | * Return 1 for event in sw context, 0 for event in hw context | |
1127 | */ | |
1128 | static inline int in_software_context(struct perf_event *event) | |
1129 | { | |
1130 | return event->ctx->pmu->task_ctx_nr == perf_sw_context; | |
1131 | } | |
1132 | ||
8a58ddae AS |
1133 | static inline int is_exclusive_pmu(struct pmu *pmu) |
1134 | { | |
1135 | return pmu->capabilities & PERF_PMU_CAP_EXCLUSIVE; | |
1136 | } | |
1137 | ||
c5905afb | 1138 | extern struct static_key perf_swevent_enabled[PERF_COUNT_SW_MAX]; |
f29ac756 | 1139 | |
86038c5e | 1140 | extern void ___perf_sw_event(u32, u64, struct pt_regs *, u64); |
a8b0ca17 | 1141 | extern void __perf_sw_event(u32, u64, struct pt_regs *, u64); |
f29ac756 | 1142 | |
b0f82b81 | 1143 | #ifndef perf_arch_fetch_caller_regs |
e7e7ee2e | 1144 | static inline void perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip) { } |
b0f82b81 | 1145 | #endif |
5331d7b8 FW |
1146 | |
1147 | /* | |
d15d3568 KS |
1148 | * When generating a perf sample in-line, instead of from an interrupt / |
1149 | * exception, we lack a pt_regs. This is typically used from software events | |
1150 | * like: SW_CONTEXT_SWITCHES, SW_MIGRATIONS and the tie-in with tracepoints. | |
1151 | * | |
1152 | * We typically don't need a full set, but (for x86) do require: | |
5331d7b8 FW |
1153 | * - ip for PERF_SAMPLE_IP |
1154 | * - cs for user_mode() tests | |
d15d3568 KS |
1155 | * - sp for PERF_SAMPLE_CALLCHAIN |
1156 | * - eflags for MISC bits and CALLCHAIN (see: perf_hw_regs()) | |
1157 | * | |
1158 | * NOTE: assumes @regs is otherwise already 0 filled; this is important for | |
1159 | * things like PERF_SAMPLE_REGS_INTR. | |
5331d7b8 | 1160 | */ |
b0f82b81 | 1161 | static inline void perf_fetch_caller_regs(struct pt_regs *regs) |
5331d7b8 | 1162 | { |
b0f82b81 | 1163 | perf_arch_fetch_caller_regs(regs, CALLER_ADDR0); |
5331d7b8 FW |
1164 | } |
1165 | ||
7e54a5a0 | 1166 | static __always_inline void |
a8b0ca17 | 1167 | perf_sw_event(u32 event_id, u64 nr, struct pt_regs *regs, u64 addr) |
e49a5bd3 | 1168 | { |
86038c5e PZI |
1169 | if (static_key_false(&perf_swevent_enabled[event_id])) |
1170 | __perf_sw_event(event_id, nr, regs, addr); | |
1171 | } | |
1172 | ||
1173 | DECLARE_PER_CPU(struct pt_regs, __perf_regs[4]); | |
7e54a5a0 | 1174 | |
86038c5e PZI |
1175 | /* |
1176 | * 'Special' version for the scheduler, it hard assumes no recursion, | |
1177 | * which is guaranteed by us not actually scheduling inside other swevents | |
1178 | * because those disable preemption. | |
1179 | */ | |
7c8056bb | 1180 | static __always_inline void __perf_sw_event_sched(u32 event_id, u64 nr, u64 addr) |
86038c5e | 1181 | { |
7c8056bb | 1182 | struct pt_regs *regs = this_cpu_ptr(&__perf_regs[0]); |
86038c5e | 1183 | |
7c8056bb NK |
1184 | perf_fetch_caller_regs(regs); |
1185 | ___perf_sw_event(event_id, nr, regs, addr); | |
e49a5bd3 FW |
1186 | } |
1187 | ||
9107c89e | 1188 | extern struct static_key_false perf_sched_events; |
ee6dcfa4 | 1189 | |
7c8056bb | 1190 | static __always_inline bool __perf_sw_enabled(int swevt) |
ff303e66 | 1191 | { |
7c8056bb | 1192 | return static_key_false(&perf_swevent_enabled[swevt]); |
ff303e66 PZ |
1193 | } |
1194 | ||
1195 | static inline void perf_event_task_migrate(struct task_struct *task) | |
1196 | { | |
7c8056bb | 1197 | if (__perf_sw_enabled(PERF_COUNT_SW_CPU_MIGRATIONS)) |
ff303e66 PZ |
1198 | task->sched_migrated = 1; |
1199 | } | |
1200 | ||
ab0cce56 | 1201 | static inline void perf_event_task_sched_in(struct task_struct *prev, |
a8d757ef | 1202 | struct task_struct *task) |
ab0cce56 | 1203 | { |
9107c89e | 1204 | if (static_branch_unlikely(&perf_sched_events)) |
ab0cce56 | 1205 | __perf_event_task_sched_in(prev, task); |
ff303e66 | 1206 | |
7c8056bb NK |
1207 | if (__perf_sw_enabled(PERF_COUNT_SW_CPU_MIGRATIONS) && |
1208 | task->sched_migrated) { | |
1209 | __perf_sw_event_sched(PERF_COUNT_SW_CPU_MIGRATIONS, 1, 0); | |
ff303e66 PZ |
1210 | task->sched_migrated = 0; |
1211 | } | |
ab0cce56 JO |
1212 | } |
1213 | ||
1214 | static inline void perf_event_task_sched_out(struct task_struct *prev, | |
1215 | struct task_struct *next) | |
ee6dcfa4 | 1216 | { |
7c8056bb NK |
1217 | if (__perf_sw_enabled(PERF_COUNT_SW_CONTEXT_SWITCHES)) |
1218 | __perf_sw_event_sched(PERF_COUNT_SW_CONTEXT_SWITCHES, 1, 0); | |
ee6dcfa4 | 1219 | |
d0d1dd62 NK |
1220 | #ifdef CONFIG_CGROUP_PERF |
1221 | if (__perf_sw_enabled(PERF_COUNT_SW_CGROUP_SWITCHES) && | |
1222 | perf_cgroup_from_task(prev, NULL) != | |
1223 | perf_cgroup_from_task(next, NULL)) | |
1224 | __perf_sw_event_sched(PERF_COUNT_SW_CGROUP_SWITCHES, 1, 0); | |
1225 | #endif | |
1226 | ||
9107c89e | 1227 | if (static_branch_unlikely(&perf_sched_events)) |
ab0cce56 | 1228 | __perf_event_task_sched_out(prev, next); |
ee6dcfa4 PZ |
1229 | } |
1230 | ||
3af9e859 | 1231 | extern void perf_event_mmap(struct vm_area_struct *vma); |
76193a94 SL |
1232 | |
1233 | extern void perf_event_ksymbol(u16 ksym_type, u64 addr, u32 len, | |
1234 | bool unregister, const char *sym); | |
6ee52e2a SL |
1235 | extern void perf_event_bpf_event(struct bpf_prog *prog, |
1236 | enum perf_bpf_event_type type, | |
1237 | u16 flags); | |
76193a94 | 1238 | |
39447b38 | 1239 | extern struct perf_guest_info_callbacks *perf_guest_cbs; |
dcf46b94 ZY |
1240 | extern int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks); |
1241 | extern int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks); | |
39447b38 | 1242 | |
e041e328 | 1243 | extern void perf_event_exec(void); |
82b89778 | 1244 | extern void perf_event_comm(struct task_struct *tsk, bool exec); |
e4222673 | 1245 | extern void perf_event_namespaces(struct task_struct *tsk); |
cdd6c482 | 1246 | extern void perf_event_fork(struct task_struct *tsk); |
e17d43b9 AH |
1247 | extern void perf_event_text_poke(const void *addr, |
1248 | const void *old_bytes, size_t old_len, | |
1249 | const void *new_bytes, size_t new_len); | |
8d1b2d93 | 1250 | |
56962b44 FW |
1251 | /* Callchains */ |
1252 | DECLARE_PER_CPU(struct perf_callchain_entry, perf_callchain_entry); | |
1253 | ||
cfbcf468 ACM |
1254 | extern void perf_callchain_user(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs); |
1255 | extern void perf_callchain_kernel(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs); | |
568b329a AS |
1256 | extern struct perf_callchain_entry * |
1257 | get_perf_callchain(struct pt_regs *regs, u32 init_nr, bool kernel, bool user, | |
cfbcf468 | 1258 | u32 max_stack, bool crosstask, bool add_mark); |
6cbc304f | 1259 | extern struct perf_callchain_entry *perf_callchain(struct perf_event *event, struct pt_regs *regs); |
97c79a38 | 1260 | extern int get_callchain_buffers(int max_stack); |
568b329a | 1261 | extern void put_callchain_buffers(void); |
d141b8bc SL |
1262 | extern struct perf_callchain_entry *get_callchain_entry(int *rctx); |
1263 | extern void put_callchain_entry(int rctx); | |
394ee076 | 1264 | |
c5dfd78e | 1265 | extern int sysctl_perf_event_max_stack; |
c85b0334 | 1266 | extern int sysctl_perf_event_max_contexts_per_stack; |
c5dfd78e | 1267 | |
c85b0334 ACM |
1268 | static inline int perf_callchain_store_context(struct perf_callchain_entry_ctx *ctx, u64 ip) |
1269 | { | |
1270 | if (ctx->contexts < sysctl_perf_event_max_contexts_per_stack) { | |
1271 | struct perf_callchain_entry *entry = ctx->entry; | |
1272 | entry->ip[entry->nr++] = ip; | |
1273 | ++ctx->contexts; | |
1274 | return 0; | |
1275 | } else { | |
1276 | ctx->contexts_maxed = true; | |
1277 | return -1; /* no more room, stop walking the stack */ | |
1278 | } | |
1279 | } | |
3e4de4ec | 1280 | |
cfbcf468 | 1281 | static inline int perf_callchain_store(struct perf_callchain_entry_ctx *ctx, u64 ip) |
70791ce9 | 1282 | { |
c85b0334 | 1283 | if (ctx->nr < ctx->max_stack && !ctx->contexts_maxed) { |
3b1fff08 | 1284 | struct perf_callchain_entry *entry = ctx->entry; |
70791ce9 | 1285 | entry->ip[entry->nr++] = ip; |
3b1fff08 | 1286 | ++ctx->nr; |
568b329a AS |
1287 | return 0; |
1288 | } else { | |
1289 | return -1; /* no more room, stop walking the stack */ | |
1290 | } | |
70791ce9 | 1291 | } |
394ee076 | 1292 | |
cdd6c482 IM |
1293 | extern int sysctl_perf_event_paranoid; |
1294 | extern int sysctl_perf_event_mlock; | |
1295 | extern int sysctl_perf_event_sample_rate; | |
14c63f17 DH |
1296 | extern int sysctl_perf_cpu_time_max_percent; |
1297 | ||
1298 | extern void perf_sample_event_took(u64 sample_len_ns); | |
1ccd1549 | 1299 | |
32927393 CH |
1300 | int perf_proc_update_handler(struct ctl_table *table, int write, |
1301 | void *buffer, size_t *lenp, loff_t *ppos); | |
1302 | int perf_cpu_time_max_percent_handler(struct ctl_table *table, int write, | |
1303 | void *buffer, size_t *lenp, loff_t *ppos); | |
c5dfd78e | 1304 | int perf_event_max_stack_handler(struct ctl_table *table, int write, |
32927393 | 1305 | void *buffer, size_t *lenp, loff_t *ppos); |
163ec435 | 1306 | |
da97e184 JFG |
1307 | /* Access to perf_event_open(2) syscall. */ |
1308 | #define PERF_SECURITY_OPEN 0 | |
1309 | ||
1310 | /* Finer grained perf_event_open(2) access control. */ | |
1311 | #define PERF_SECURITY_CPU 1 | |
1312 | #define PERF_SECURITY_KERNEL 2 | |
1313 | #define PERF_SECURITY_TRACEPOINT 3 | |
1314 | ||
1315 | static inline int perf_is_paranoid(void) | |
320ebf09 PZ |
1316 | { |
1317 | return sysctl_perf_event_paranoid > -1; | |
1318 | } | |
1319 | ||
da97e184 | 1320 | static inline int perf_allow_kernel(struct perf_event_attr *attr) |
320ebf09 | 1321 | { |
18aa1856 | 1322 | if (sysctl_perf_event_paranoid > 1 && !perfmon_capable()) |
da97e184 JFG |
1323 | return -EACCES; |
1324 | ||
1325 | return security_perf_event_open(attr, PERF_SECURITY_KERNEL); | |
320ebf09 PZ |
1326 | } |
1327 | ||
da97e184 | 1328 | static inline int perf_allow_cpu(struct perf_event_attr *attr) |
320ebf09 | 1329 | { |
18aa1856 | 1330 | if (sysctl_perf_event_paranoid > 0 && !perfmon_capable()) |
da97e184 JFG |
1331 | return -EACCES; |
1332 | ||
1333 | return security_perf_event_open(attr, PERF_SECURITY_CPU); | |
1334 | } | |
1335 | ||
1336 | static inline int perf_allow_tracepoint(struct perf_event_attr *attr) | |
1337 | { | |
18aa1856 | 1338 | if (sysctl_perf_event_paranoid > -1 && !perfmon_capable()) |
da97e184 JFG |
1339 | return -EPERM; |
1340 | ||
1341 | return security_perf_event_open(attr, PERF_SECURITY_TRACEPOINT); | |
320ebf09 PZ |
1342 | } |
1343 | ||
cdd6c482 | 1344 | extern void perf_event_init(void); |
1e1dcd93 | 1345 | extern void perf_tp_event(u16 event_type, u64 count, void *record, |
1c024eca | 1346 | int entry_size, struct pt_regs *regs, |
e6dab5ff | 1347 | struct hlist_head *head, int rctx, |
8fd0fbbe | 1348 | struct task_struct *task); |
24f1e32c | 1349 | extern void perf_bp_event(struct perf_event *event, void *data); |
0d905bca | 1350 | |
9d23a90a | 1351 | #ifndef perf_misc_flags |
e7e7ee2e IM |
1352 | # define perf_misc_flags(regs) \ |
1353 | (user_mode(regs) ? PERF_RECORD_MISC_USER : PERF_RECORD_MISC_KERNEL) | |
1354 | # define perf_instruction_pointer(regs) instruction_pointer(regs) | |
9d23a90a | 1355 | #endif |
c895f6f7 HB |
1356 | #ifndef perf_arch_bpf_user_pt_regs |
1357 | # define perf_arch_bpf_user_pt_regs(regs) regs | |
1358 | #endif | |
9d23a90a | 1359 | |
bce38cd5 SE |
1360 | static inline bool has_branch_stack(struct perf_event *event) |
1361 | { | |
1362 | return event->attr.sample_type & PERF_SAMPLE_BRANCH_STACK; | |
a46a2300 YZ |
1363 | } |
1364 | ||
1365 | static inline bool needs_branch_stack(struct perf_event *event) | |
1366 | { | |
1367 | return event->attr.branch_sample_type != 0; | |
bce38cd5 SE |
1368 | } |
1369 | ||
45bfb2e5 PZ |
1370 | static inline bool has_aux(struct perf_event *event) |
1371 | { | |
1372 | return event->pmu->setup_aux; | |
1373 | } | |
1374 | ||
9ecda41a WN |
1375 | static inline bool is_write_backward(struct perf_event *event) |
1376 | { | |
1377 | return !!event->attr.write_backward; | |
1378 | } | |
1379 | ||
375637bc AS |
1380 | static inline bool has_addr_filter(struct perf_event *event) |
1381 | { | |
1382 | return event->pmu->nr_addr_filters; | |
1383 | } | |
1384 | ||
1385 | /* | |
1386 | * An inherited event uses parent's filters | |
1387 | */ | |
1388 | static inline struct perf_addr_filters_head * | |
1389 | perf_event_addr_filters(struct perf_event *event) | |
1390 | { | |
1391 | struct perf_addr_filters_head *ifh = &event->addr_filters; | |
1392 | ||
1393 | if (event->parent) | |
1394 | ifh = &event->parent->addr_filters; | |
1395 | ||
1396 | return ifh; | |
1397 | } | |
1398 | ||
1399 | extern void perf_event_addr_filters_sync(struct perf_event *event); | |
1400 | ||
5622f295 | 1401 | extern int perf_output_begin(struct perf_output_handle *handle, |
267fb273 | 1402 | struct perf_sample_data *data, |
a7ac67ea | 1403 | struct perf_event *event, unsigned int size); |
9ecda41a | 1404 | extern int perf_output_begin_forward(struct perf_output_handle *handle, |
267fb273 PZ |
1405 | struct perf_sample_data *data, |
1406 | struct perf_event *event, | |
1407 | unsigned int size); | |
9ecda41a | 1408 | extern int perf_output_begin_backward(struct perf_output_handle *handle, |
267fb273 | 1409 | struct perf_sample_data *data, |
9ecda41a WN |
1410 | struct perf_event *event, |
1411 | unsigned int size); | |
1412 | ||
5622f295 | 1413 | extern void perf_output_end(struct perf_output_handle *handle); |
91d7753a | 1414 | extern unsigned int perf_output_copy(struct perf_output_handle *handle, |
5622f295 | 1415 | const void *buf, unsigned int len); |
5685e0ff JO |
1416 | extern unsigned int perf_output_skip(struct perf_output_handle *handle, |
1417 | unsigned int len); | |
a4faf00d AS |
1418 | extern long perf_output_copy_aux(struct perf_output_handle *aux_handle, |
1419 | struct perf_output_handle *handle, | |
1420 | unsigned long from, unsigned long to); | |
4ed7c92d PZ |
1421 | extern int perf_swevent_get_recursion_context(void); |
1422 | extern void perf_swevent_put_recursion_context(int rctx); | |
ab573844 | 1423 | extern u64 perf_swevent_set_period(struct perf_event *event); |
44234adc FW |
1424 | extern void perf_event_enable(struct perf_event *event); |
1425 | extern void perf_event_disable(struct perf_event *event); | |
fae3fde6 | 1426 | extern void perf_event_disable_local(struct perf_event *event); |
5aab90ce | 1427 | extern void perf_event_disable_inatomic(struct perf_event *event); |
e9d2b064 | 1428 | extern void perf_event_task_tick(void); |
475113d9 | 1429 | extern int perf_event_account_interrupt(struct perf_event *event); |
3ca270fc | 1430 | extern int perf_event_period(struct perf_event *event, u64 value); |
52ba4b0b | 1431 | extern u64 perf_event_pause(struct perf_event *event, bool reset); |
e041e328 | 1432 | #else /* !CONFIG_PERF_EVENTS: */ |
fdc26706 AS |
1433 | static inline void * |
1434 | perf_aux_output_begin(struct perf_output_handle *handle, | |
1435 | struct perf_event *event) { return NULL; } | |
1436 | static inline void | |
f4c0b0aa WD |
1437 | perf_aux_output_end(struct perf_output_handle *handle, unsigned long size) |
1438 | { } | |
fdc26706 AS |
1439 | static inline int |
1440 | perf_aux_output_skip(struct perf_output_handle *handle, | |
1441 | unsigned long size) { return -EINVAL; } | |
1442 | static inline void * | |
1443 | perf_get_aux(struct perf_output_handle *handle) { return NULL; } | |
0793a61d | 1444 | static inline void |
ff303e66 PZ |
1445 | perf_event_task_migrate(struct task_struct *task) { } |
1446 | static inline void | |
ab0cce56 JO |
1447 | perf_event_task_sched_in(struct task_struct *prev, |
1448 | struct task_struct *task) { } | |
1449 | static inline void | |
1450 | perf_event_task_sched_out(struct task_struct *prev, | |
1451 | struct task_struct *next) { } | |
2b26f0aa ME |
1452 | static inline int perf_event_init_task(struct task_struct *child, |
1453 | u64 clone_flags) { return 0; } | |
cdd6c482 IM |
1454 | static inline void perf_event_exit_task(struct task_struct *child) { } |
1455 | static inline void perf_event_free_task(struct task_struct *task) { } | |
4e231c79 | 1456 | static inline void perf_event_delayed_put(struct task_struct *task) { } |
e03e7ee3 | 1457 | static inline struct file *perf_event_get(unsigned int fd) { return ERR_PTR(-EINVAL); } |
f8d959a5 YS |
1458 | static inline const struct perf_event *perf_get_event(struct file *file) |
1459 | { | |
1460 | return ERR_PTR(-EINVAL); | |
1461 | } | |
ffe8690c KX |
1462 | static inline const struct perf_event_attr *perf_event_attrs(struct perf_event *event) |
1463 | { | |
1464 | return ERR_PTR(-EINVAL); | |
1465 | } | |
7d9285e8 YS |
1466 | static inline int perf_event_read_local(struct perf_event *event, u64 *value, |
1467 | u64 *enabled, u64 *running) | |
f91840a3 AS |
1468 | { |
1469 | return -EINVAL; | |
1470 | } | |
57c0c15b | 1471 | static inline void perf_event_print_debug(void) { } |
57c0c15b IM |
1472 | static inline int perf_event_task_disable(void) { return -EINVAL; } |
1473 | static inline int perf_event_task_enable(void) { return -EINVAL; } | |
26ca5c11 AK |
1474 | static inline int perf_event_refresh(struct perf_event *event, int refresh) |
1475 | { | |
1476 | return -EINVAL; | |
1477 | } | |
15dbf27c | 1478 | |
925d519a | 1479 | static inline void |
a8b0ca17 | 1480 | perf_sw_event(u32 event_id, u64 nr, struct pt_regs *regs, u64 addr) { } |
24f1e32c | 1481 | static inline void |
184f412c | 1482 | perf_bp_event(struct perf_event *event, void *data) { } |
0a4a9391 | 1483 | |
39447b38 | 1484 | static inline int perf_register_guest_info_callbacks |
e7e7ee2e | 1485 | (struct perf_guest_info_callbacks *callbacks) { return 0; } |
39447b38 | 1486 | static inline int perf_unregister_guest_info_callbacks |
e7e7ee2e | 1487 | (struct perf_guest_info_callbacks *callbacks) { return 0; } |
39447b38 | 1488 | |
57c0c15b | 1489 | static inline void perf_event_mmap(struct vm_area_struct *vma) { } |
76193a94 SL |
1490 | |
1491 | typedef int (perf_ksymbol_get_name_f)(char *name, int name_len, void *data); | |
1492 | static inline void perf_event_ksymbol(u16 ksym_type, u64 addr, u32 len, | |
1493 | bool unregister, const char *sym) { } | |
6ee52e2a SL |
1494 | static inline void perf_event_bpf_event(struct bpf_prog *prog, |
1495 | enum perf_bpf_event_type type, | |
1496 | u16 flags) { } | |
e041e328 | 1497 | static inline void perf_event_exec(void) { } |
82b89778 | 1498 | static inline void perf_event_comm(struct task_struct *tsk, bool exec) { } |
e4222673 | 1499 | static inline void perf_event_namespaces(struct task_struct *tsk) { } |
cdd6c482 | 1500 | static inline void perf_event_fork(struct task_struct *tsk) { } |
e17d43b9 AH |
1501 | static inline void perf_event_text_poke(const void *addr, |
1502 | const void *old_bytes, | |
1503 | size_t old_len, | |
1504 | const void *new_bytes, | |
1505 | size_t new_len) { } | |
cdd6c482 | 1506 | static inline void perf_event_init(void) { } |
184f412c | 1507 | static inline int perf_swevent_get_recursion_context(void) { return -1; } |
4ed7c92d | 1508 | static inline void perf_swevent_put_recursion_context(int rctx) { } |
ab573844 | 1509 | static inline u64 perf_swevent_set_period(struct perf_event *event) { return 0; } |
44234adc FW |
1510 | static inline void perf_event_enable(struct perf_event *event) { } |
1511 | static inline void perf_event_disable(struct perf_event *event) { } | |
500ad2d8 | 1512 | static inline int __perf_event_disable(void *info) { return -1; } |
e9d2b064 | 1513 | static inline void perf_event_task_tick(void) { } |
ffe8690c | 1514 | static inline int perf_event_release_kernel(struct perf_event *event) { return 0; } |
3ca270fc LX |
1515 | static inline int perf_event_period(struct perf_event *event, u64 value) |
1516 | { | |
1517 | return -EINVAL; | |
1518 | } | |
52ba4b0b LX |
1519 | static inline u64 perf_event_pause(struct perf_event *event, bool reset) |
1520 | { | |
1521 | return 0; | |
1522 | } | |
0793a61d TG |
1523 | #endif |
1524 | ||
6c4d3bc9 DR |
1525 | #if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_CPU_SUP_INTEL) |
1526 | extern void perf_restore_debug_store(void); | |
1527 | #else | |
1d9d8639 | 1528 | static inline void perf_restore_debug_store(void) { } |
0793a61d TG |
1529 | #endif |
1530 | ||
7e3f977e DB |
1531 | static __always_inline bool perf_raw_frag_last(const struct perf_raw_frag *frag) |
1532 | { | |
1533 | return frag->pad < sizeof(u64); | |
1534 | } | |
1535 | ||
e7e7ee2e | 1536 | #define perf_output_put(handle, x) perf_output_copy((handle), &(x), sizeof(x)) |
5622f295 | 1537 | |
2663960c SB |
1538 | struct perf_pmu_events_attr { |
1539 | struct device_attribute attr; | |
1540 | u64 id; | |
3a54aaa0 | 1541 | const char *event_str; |
2663960c SB |
1542 | }; |
1543 | ||
fc07e9f9 AK |
1544 | struct perf_pmu_events_ht_attr { |
1545 | struct device_attribute attr; | |
1546 | u64 id; | |
1547 | const char *event_str_ht; | |
1548 | const char *event_str_noht; | |
1549 | }; | |
1550 | ||
a9c81ccd KL |
1551 | struct perf_pmu_events_hybrid_attr { |
1552 | struct device_attribute attr; | |
1553 | u64 id; | |
1554 | const char *event_str; | |
1555 | u64 pmu_type; | |
1556 | }; | |
1557 | ||
1558 | struct perf_pmu_format_hybrid_attr { | |
1559 | struct device_attribute attr; | |
1560 | u64 pmu_type; | |
1561 | }; | |
1562 | ||
fd979c01 CS |
1563 | ssize_t perf_event_sysfs_show(struct device *dev, struct device_attribute *attr, |
1564 | char *page); | |
1565 | ||
2663960c SB |
1566 | #define PMU_EVENT_ATTR(_name, _var, _id, _show) \ |
1567 | static struct perf_pmu_events_attr _var = { \ | |
1568 | .attr = __ATTR(_name, 0444, _show, NULL), \ | |
1569 | .id = _id, \ | |
1570 | }; | |
1571 | ||
f0405b81 CS |
1572 | #define PMU_EVENT_ATTR_STRING(_name, _var, _str) \ |
1573 | static struct perf_pmu_events_attr _var = { \ | |
1574 | .attr = __ATTR(_name, 0444, perf_event_sysfs_show, NULL), \ | |
1575 | .id = 0, \ | |
1576 | .event_str = _str, \ | |
1577 | }; | |
1578 | ||
f8e6d241 QL |
1579 | #define PMU_EVENT_ATTR_ID(_name, _show, _id) \ |
1580 | (&((struct perf_pmu_events_attr[]) { \ | |
1581 | { .attr = __ATTR(_name, 0444, _show, NULL), \ | |
1582 | .id = _id, } \ | |
1583 | })[0].attr.attr) | |
1584 | ||
641cc938 JO |
1585 | #define PMU_FORMAT_ATTR(_name, _format) \ |
1586 | static ssize_t \ | |
1587 | _name##_show(struct device *dev, \ | |
1588 | struct device_attribute *attr, \ | |
1589 | char *page) \ | |
1590 | { \ | |
1591 | BUILD_BUG_ON(sizeof(_format) >= PAGE_SIZE); \ | |
1592 | return sprintf(page, _format "\n"); \ | |
1593 | } \ | |
1594 | \ | |
1595 | static struct device_attribute format_attr_##_name = __ATTR_RO(_name) | |
1596 | ||
00e16c3d TG |
1597 | /* Performance counter hotplug functions */ |
1598 | #ifdef CONFIG_PERF_EVENTS | |
1599 | int perf_event_init_cpu(unsigned int cpu); | |
1600 | int perf_event_exit_cpu(unsigned int cpu); | |
1601 | #else | |
1602 | #define perf_event_init_cpu NULL | |
1603 | #define perf_event_exit_cpu NULL | |
1604 | #endif | |
1605 | ||
f1ec3a51 BT |
1606 | extern void __weak arch_perf_update_userpage(struct perf_event *event, |
1607 | struct perf_event_mmap_page *userpg, | |
1608 | u64 now); | |
1609 | ||
51b646b2 PZ |
1610 | #ifdef CONFIG_MMU |
1611 | extern __weak u64 arch_perf_get_page_size(struct mm_struct *mm, unsigned long addr); | |
1612 | #endif | |
1613 | ||
cdd6c482 | 1614 | #endif /* _LINUX_PERF_EVENT_H */ |