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USB: add hex/bcd detection to usb modalias generation
[linux-2.6.git] / include / linux / perf_event.h
blob43adbd7f0010c21719f75dc05dfbf5d61465abf7
1 /*
2 * Performance events:
3 *
4 * Copyright (C) 2008-2009, Thomas Gleixner <tglx@linutronix.de>
5 * Copyright (C) 2008-2009, Red Hat, Inc., Ingo Molnar
6 * Copyright (C) 2008-2009, Red Hat, Inc., Peter Zijlstra
7 *
8 * Data type definitions, declarations, prototypes.
9 *
10 * Started by: Thomas Gleixner and Ingo Molnar
11 *
12 * For licencing details see kernel-base/COPYING
13 */
14 #ifndef _LINUX_PERF_EVENT_H
15 #define _LINUX_PERF_EVENT_H
16
17 #include <linux/types.h>
18 #include <linux/ioctl.h>
19 #include <asm/byteorder.h>
20
21 #ifdef CONFIG_HAVE_HW_BREAKPOINT
22 #include <asm/hw_breakpoint.h>
23 #endif
24
25 /*
26 * User-space ABI bits:
27 */
28
29 /*
30 * attr.type
31 */
32 enum perf_type_id {
33 PERF_TYPE_HARDWARE = 0,
34 PERF_TYPE_SOFTWARE = 1,
35 PERF_TYPE_TRACEPOINT = 2,
36 PERF_TYPE_HW_CACHE = 3,
37 PERF_TYPE_RAW = 4,
38 PERF_TYPE_BREAKPOINT = 5,
39
40 PERF_TYPE_MAX, /* non-ABI */
41 };
42
43 /*
44 * Generalized performance event event_id types, used by the
45 * attr.event_id parameter of the sys_perf_event_open()
46 * syscall:
47 */
48 enum perf_hw_id {
49 /*
50 * Common hardware events, generalized by the kernel:
51 */
52 PERF_COUNT_HW_CPU_CYCLES = 0,
53 PERF_COUNT_HW_INSTRUCTIONS = 1,
54 PERF_COUNT_HW_CACHE_REFERENCES = 2,
55 PERF_COUNT_HW_CACHE_MISSES = 3,
56 PERF_COUNT_HW_BRANCH_INSTRUCTIONS = 4,
57 PERF_COUNT_HW_BRANCH_MISSES = 5,
58 PERF_COUNT_HW_BUS_CYCLES = 6,
59
60 PERF_COUNT_HW_MAX, /* non-ABI */
61 };
62
63 /*
64 * Generalized hardware cache events:
65 *
66 * { L1-D, L1-I, LLC, ITLB, DTLB, BPU } x
67 * { read, write, prefetch } x
68 * { accesses, misses }
69 */
70 enum perf_hw_cache_id {
71 PERF_COUNT_HW_CACHE_L1D = 0,
72 PERF_COUNT_HW_CACHE_L1I = 1,
73 PERF_COUNT_HW_CACHE_LL = 2,
74 PERF_COUNT_HW_CACHE_DTLB = 3,
75 PERF_COUNT_HW_CACHE_ITLB = 4,
76 PERF_COUNT_HW_CACHE_BPU = 5,
77
78 PERF_COUNT_HW_CACHE_MAX, /* non-ABI */
79 };
80
81 enum perf_hw_cache_op_id {
82 PERF_COUNT_HW_CACHE_OP_READ = 0,
83 PERF_COUNT_HW_CACHE_OP_WRITE = 1,
84 PERF_COUNT_HW_CACHE_OP_PREFETCH = 2,
85
86 PERF_COUNT_HW_CACHE_OP_MAX, /* non-ABI */
87 };
88
89 enum perf_hw_cache_op_result_id {
90 PERF_COUNT_HW_CACHE_RESULT_ACCESS = 0,
91 PERF_COUNT_HW_CACHE_RESULT_MISS = 1,
92
93 PERF_COUNT_HW_CACHE_RESULT_MAX, /* non-ABI */
94 };
95
96 /*
97 * Special "software" events provided by the kernel, even if the hardware
98 * does not support performance events. These events measure various
99 * physical and sw events of the kernel (and allow the profiling of them as
100 * well):
101 */
102 enum perf_sw_ids {
103 PERF_COUNT_SW_CPU_CLOCK = 0,
104 PERF_COUNT_SW_TASK_CLOCK = 1,
105 PERF_COUNT_SW_PAGE_FAULTS = 2,
106 PERF_COUNT_SW_CONTEXT_SWITCHES = 3,
107 PERF_COUNT_SW_CPU_MIGRATIONS = 4,
108 PERF_COUNT_SW_PAGE_FAULTS_MIN = 5,
109 PERF_COUNT_SW_PAGE_FAULTS_MAJ = 6,
110 PERF_COUNT_SW_ALIGNMENT_FAULTS = 7,
111 PERF_COUNT_SW_EMULATION_FAULTS = 8,
112
113 PERF_COUNT_SW_MAX, /* non-ABI */
114 };
115
116 /*
117 * Bits that can be set in attr.sample_type to request information
118 * in the overflow packets.
119 */
120 enum perf_event_sample_format {
121 PERF_SAMPLE_IP = 1U << 0,
122 PERF_SAMPLE_TID = 1U << 1,
123 PERF_SAMPLE_TIME = 1U << 2,
124 PERF_SAMPLE_ADDR = 1U << 3,
125 PERF_SAMPLE_READ = 1U << 4,
126 PERF_SAMPLE_CALLCHAIN = 1U << 5,
127 PERF_SAMPLE_ID = 1U << 6,
128 PERF_SAMPLE_CPU = 1U << 7,
129 PERF_SAMPLE_PERIOD = 1U << 8,
130 PERF_SAMPLE_STREAM_ID = 1U << 9,
131 PERF_SAMPLE_RAW = 1U << 10,
132
133 PERF_SAMPLE_MAX = 1U << 11, /* non-ABI */
134 };
135
136 /*
137 * The format of the data returned by read() on a perf event fd,
138 * as specified by attr.read_format:
139 *
140 * struct read_format {
141 * { u64 value;
142 * { u64 time_enabled; } && PERF_FORMAT_ENABLED
143 * { u64 time_running; } && PERF_FORMAT_RUNNING
144 * { u64 id; } && PERF_FORMAT_ID
145 * } && !PERF_FORMAT_GROUP
146 *
147 * { u64 nr;
148 * { u64 time_enabled; } && PERF_FORMAT_ENABLED
149 * { u64 time_running; } && PERF_FORMAT_RUNNING
150 * { u64 value;
151 * { u64 id; } && PERF_FORMAT_ID
152 * } cntr[nr];
153 * } && PERF_FORMAT_GROUP
154 * };
155 */
156 enum perf_event_read_format {
157 PERF_FORMAT_TOTAL_TIME_ENABLED = 1U << 0,
158 PERF_FORMAT_TOTAL_TIME_RUNNING = 1U << 1,
159 PERF_FORMAT_ID = 1U << 2,
160 PERF_FORMAT_GROUP = 1U << 3,
161
162 PERF_FORMAT_MAX = 1U << 4, /* non-ABI */
163 };
164
165 #define PERF_ATTR_SIZE_VER0 64 /* sizeof first published struct */
166
167 /*
168 * Hardware event_id to monitor via a performance monitoring event:
169 */
170 struct perf_event_attr {
171
172 /*
173 * Major type: hardware/software/tracepoint/etc.
174 */
175 __u32 type;
176
177 /*
178 * Size of the attr structure, for fwd/bwd compat.
179 */
180 __u32 size;
181
182 /*
183 * Type specific configuration information.
184 */
185 __u64 config;
186
187 union {
188 __u64 sample_period;
189 __u64 sample_freq;
190 };
191
192 __u64 sample_type;
193 __u64 read_format;
194
195 __u64 disabled : 1, /* off by default */
196 inherit : 1, /* children inherit it */
197 pinned : 1, /* must always be on PMU */
198 exclusive : 1, /* only group on PMU */
199 exclude_user : 1, /* don't count user */
200 exclude_kernel : 1, /* ditto kernel */
201 exclude_hv : 1, /* ditto hypervisor */
202 exclude_idle : 1, /* don't count when idle */
203 mmap : 1, /* include mmap data */
204 comm : 1, /* include comm data */
205 freq : 1, /* use freq, not period */
206 inherit_stat : 1, /* per task counts */
207 enable_on_exec : 1, /* next exec enables */
208 task : 1, /* trace fork/exit */
209 watermark : 1, /* wakeup_watermark */
210
211 __reserved_1 : 49;
212
213 union {
214 __u32 wakeup_events; /* wakeup every n events */
215 __u32 wakeup_watermark; /* bytes before wakeup */
216 };
217
218 union {
219 struct { /* Hardware breakpoint info */
220 __u64 bp_addr;
221 __u32 bp_type;
222 __u32 bp_len;
223 };
224 };
225
226 __u32 __reserved_2;
227
228 __u64 __reserved_3;
229 };
230
231 /*
232 * Ioctls that can be done on a perf event fd:
233 */
234 #define PERF_EVENT_IOC_ENABLE _IO ('$', 0)
235 #define PERF_EVENT_IOC_DISABLE _IO ('$', 1)
236 #define PERF_EVENT_IOC_REFRESH _IO ('$', 2)
237 #define PERF_EVENT_IOC_RESET _IO ('$', 3)
238 #define PERF_EVENT_IOC_PERIOD _IOW('$', 4, __u64)
239 #define PERF_EVENT_IOC_SET_OUTPUT _IO ('$', 5)
240 #define PERF_EVENT_IOC_SET_FILTER _IOW('$', 6, char *)
241
242 enum perf_event_ioc_flags {
243 PERF_IOC_FLAG_GROUP = 1U << 0,
244 };
245
246 /*
247 * Structure of the page that can be mapped via mmap
248 */
249 struct perf_event_mmap_page {
250 __u32 version; /* version number of this structure */
251 __u32 compat_version; /* lowest version this is compat with */
252
253 /*
254 * Bits needed to read the hw events in user-space.
255 *
256 * u32 seq;
257 * s64 count;
258 *
259 * do {
260 * seq = pc->lock;
261 *
262 * barrier()
263 * if (pc->index) {
264 * count = pmc_read(pc->index - 1);
265 * count += pc->offset;
266 * } else
267 * goto regular_read;
268 *
269 * barrier();
270 * } while (pc->lock != seq);
271 *
272 * NOTE: for obvious reason this only works on self-monitoring
273 * processes.
274 */
275 __u32 lock; /* seqlock for synchronization */
276 __u32 index; /* hardware event identifier */
277 __s64 offset; /* add to hardware event value */
278 __u64 time_enabled; /* time event active */
279 __u64 time_running; /* time event on cpu */
280
281 /*
282 * Hole for extension of the self monitor capabilities
283 */
284
285 __u64 __reserved[123]; /* align to 1k */
286
287 /*
288 * Control data for the mmap() data buffer.
289 *
290 * User-space reading the @data_head value should issue an rmb(), on
291 * SMP capable platforms, after reading this value -- see
292 * perf_event_wakeup().
293 *
294 * When the mapping is PROT_WRITE the @data_tail value should be
295 * written by userspace to reflect the last read data. In this case
296 * the kernel will not over-write unread data.
297 */
298 __u64 data_head; /* head in the data section */
299 __u64 data_tail; /* user-space written tail */
300 };
301
302 #define PERF_RECORD_MISC_CPUMODE_MASK (3 << 0)
303 #define PERF_RECORD_MISC_CPUMODE_UNKNOWN (0 << 0)
304 #define PERF_RECORD_MISC_KERNEL (1 << 0)
305 #define PERF_RECORD_MISC_USER (2 << 0)
306 #define PERF_RECORD_MISC_HYPERVISOR (3 << 0)
307
308 struct perf_event_header {
309 __u32 type;
310 __u16 misc;
311 __u16 size;
312 };
313
314 enum perf_event_type {
315
316 /*
317 * The MMAP events record the PROT_EXEC mappings so that we can
318 * correlate userspace IPs to code. They have the following structure:
319 *
320 * struct {
321 * struct perf_event_header header;
322 *
323 * u32 pid, tid;
324 * u64 addr;
325 * u64 len;
326 * u64 pgoff;
327 * char filename[];
328 * };
329 */
330 PERF_RECORD_MMAP = 1,
331
332 /*
333 * struct {
334 * struct perf_event_header header;
335 * u64 id;
336 * u64 lost;
337 * };
338 */
339 PERF_RECORD_LOST = 2,
340
341 /*
342 * struct {
343 * struct perf_event_header header;
344 *
345 * u32 pid, tid;
346 * char comm[];
347 * };
348 */
349 PERF_RECORD_COMM = 3,
350
351 /*
352 * struct {
353 * struct perf_event_header header;
354 * u32 pid, ppid;
355 * u32 tid, ptid;
356 * u64 time;
357 * };
358 */
359 PERF_RECORD_EXIT = 4,
360
361 /*
362 * struct {
363 * struct perf_event_header header;
364 * u64 time;
365 * u64 id;
366 * u64 stream_id;
367 * };
368 */
369 PERF_RECORD_THROTTLE = 5,
370 PERF_RECORD_UNTHROTTLE = 6,
371
372 /*
373 * struct {
374 * struct perf_event_header header;
375 * u32 pid, ppid;
376 * u32 tid, ptid;
377 * u64 time;
378 * };
379 */
380 PERF_RECORD_FORK = 7,
381
382 /*
383 * struct {
384 * struct perf_event_header header;
385 * u32 pid, tid;
386 *
387 * struct read_format values;
388 * };
389 */
390 PERF_RECORD_READ = 8,
391
392 /*
393 * struct {
394 * struct perf_event_header header;
395 *
396 * { u64 ip; } && PERF_SAMPLE_IP
397 * { u32 pid, tid; } && PERF_SAMPLE_TID
398 * { u64 time; } && PERF_SAMPLE_TIME
399 * { u64 addr; } && PERF_SAMPLE_ADDR
400 * { u64 id; } && PERF_SAMPLE_ID
401 * { u64 stream_id;} && PERF_SAMPLE_STREAM_ID
402 * { u32 cpu, res; } && PERF_SAMPLE_CPU
403 * { u64 period; } && PERF_SAMPLE_PERIOD
404 *
405 * { struct read_format values; } && PERF_SAMPLE_READ
406 *
407 * { u64 nr,
408 * u64 ips[nr]; } && PERF_SAMPLE_CALLCHAIN
409 *
410 * #
411 * # The RAW record below is opaque data wrt the ABI
412 * #
413 * # That is, the ABI doesn't make any promises wrt to
414 * # the stability of its content, it may vary depending
415 * # on event, hardware, kernel version and phase of
416 * # the moon.
417 * #
418 * # In other words, PERF_SAMPLE_RAW contents are not an ABI.
419 * #
420 *
421 * { u32 size;
422 * char data[size];}&& PERF_SAMPLE_RAW
423 * };
424 */
425 PERF_RECORD_SAMPLE = 9,
426
427 PERF_RECORD_MAX, /* non-ABI */
428 };
429
430 enum perf_callchain_context {
431 PERF_CONTEXT_HV = (__u64)-32,
432 PERF_CONTEXT_KERNEL = (__u64)-128,
433 PERF_CONTEXT_USER = (__u64)-512,
434
435 PERF_CONTEXT_GUEST = (__u64)-2048,
436 PERF_CONTEXT_GUEST_KERNEL = (__u64)-2176,
437 PERF_CONTEXT_GUEST_USER = (__u64)-2560,
438
439 PERF_CONTEXT_MAX = (__u64)-4095,
440 };
441
442 #define PERF_FLAG_FD_NO_GROUP (1U << 0)
443 #define PERF_FLAG_FD_OUTPUT (1U << 1)
444
445 #ifdef __KERNEL__
446 /*
447 * Kernel-internal data types and definitions:
448 */
449
450 #ifdef CONFIG_PERF_EVENTS
451 # include <asm/perf_event.h>
452 #endif
453
454 #include <linux/list.h>
455 #include <linux/mutex.h>
456 #include <linux/rculist.h>
457 #include <linux/rcupdate.h>
458 #include <linux/spinlock.h>
459 #include <linux/hrtimer.h>
460 #include <linux/fs.h>
461 #include <linux/pid_namespace.h>
462 #include <linux/workqueue.h>
463 #include <asm/atomic.h>
464
465 #define PERF_MAX_STACK_DEPTH 255
466
467 struct perf_callchain_entry {
468 __u64 nr;
469 __u64 ip[PERF_MAX_STACK_DEPTH];
470 };
471
472 struct perf_raw_record {
473 u32 size;
474 void *data;
475 };
476
477 struct task_struct;
478
479 /**
480 * struct hw_perf_event - performance event hardware details:
481 */
482 struct hw_perf_event {
483 #ifdef CONFIG_PERF_EVENTS
484 union {
485 struct { /* hardware */
486 u64 config;
487 unsigned long config_base;
488 unsigned long event_base;
489 int idx;
490 };
491 struct { /* software */
492 s64 remaining;
493 struct hrtimer hrtimer;
494 };
495 #ifdef CONFIG_HAVE_HW_BREAKPOINT
496 union { /* breakpoint */
497 struct arch_hw_breakpoint info;
498 };
499 #endif
500 };
501 atomic64_t prev_count;
502 u64 sample_period;
503 u64 last_period;
504 atomic64_t period_left;
505 u64 interrupts;
506
507 u64 freq_count;
508 u64 freq_interrupts;
509 u64 freq_stamp;
510 #endif
511 };
512
513 struct perf_event;
514
515 /**
516 * struct pmu - generic performance monitoring unit
517 */
518 struct pmu {
519 int (*enable) (struct perf_event *event);
520 void (*disable) (struct perf_event *event);
521 void (*read) (struct perf_event *event);
522 void (*unthrottle) (struct perf_event *event);
523 };
524
525 /**
526 * enum perf_event_active_state - the states of a event
527 */
528 enum perf_event_active_state {
529 PERF_EVENT_STATE_ERROR = -2,
530 PERF_EVENT_STATE_OFF = -1,
531 PERF_EVENT_STATE_INACTIVE = 0,
532 PERF_EVENT_STATE_ACTIVE = 1,
533 };
534
535 struct file;
536
537 struct perf_mmap_data {
538 struct rcu_head rcu_head;
539 #ifdef CONFIG_PERF_USE_VMALLOC
540 struct work_struct work;
541 #endif
542 int data_order;
543 int nr_pages; /* nr of data pages */
544 int writable; /* are we writable */
545 int nr_locked; /* nr pages mlocked */
546
547 atomic_t poll; /* POLL_ for wakeups */
548 atomic_t events; /* event_id limit */
549
550 atomic_long_t head; /* write position */
551 atomic_long_t done_head; /* completed head */
552
553 atomic_t lock; /* concurrent writes */
554 atomic_t wakeup; /* needs a wakeup */
555 atomic_t lost; /* nr records lost */
556
557 long watermark; /* wakeup watermark */
558
559 struct perf_event_mmap_page *user_page;
560 void *data_pages[0];
561 };
562
563 struct perf_pending_entry {
564 struct perf_pending_entry *next;
565 void (*func)(struct perf_pending_entry *);
566 };
567
568 typedef void (*perf_callback_t)(struct perf_event *, void *);
569
570 struct perf_sample_data;
571
572 /**
573 * struct perf_event - performance event kernel representation:
574 */
575 struct perf_event {
576 #ifdef CONFIG_PERF_EVENTS
577 struct list_head group_entry;
578 struct list_head event_entry;
579 struct list_head sibling_list;
580 int nr_siblings;
581 struct perf_event *group_leader;
582 struct perf_event *output;
583 const struct pmu *pmu;
584
585 enum perf_event_active_state state;
586 atomic64_t count;
587
588 /*
589 * These are the total time in nanoseconds that the event
590 * has been enabled (i.e. eligible to run, and the task has
591 * been scheduled in, if this is a per-task event)
592 * and running (scheduled onto the CPU), respectively.
593 *
594 * They are computed from tstamp_enabled, tstamp_running and
595 * tstamp_stopped when the event is in INACTIVE or ACTIVE state.
596 */
597 u64 total_time_enabled;
598 u64 total_time_running;
599
600 /*
601 * These are timestamps used for computing total_time_enabled
602 * and total_time_running when the event is in INACTIVE or
603 * ACTIVE state, measured in nanoseconds from an arbitrary point
604 * in time.
605 * tstamp_enabled: the notional time when the event was enabled
606 * tstamp_running: the notional time when the event was scheduled on
607 * tstamp_stopped: in INACTIVE state, the notional time when the
608 * event was scheduled off.
609 */
610 u64 tstamp_enabled;
611 u64 tstamp_running;
612 u64 tstamp_stopped;
613
614 struct perf_event_attr attr;
615 struct hw_perf_event hw;
616
617 struct perf_event_context *ctx;
618 struct file *filp;
619
620 /*
621 * These accumulate total time (in nanoseconds) that children
622 * events have been enabled and running, respectively.
623 */
624 atomic64_t child_total_time_enabled;
625 atomic64_t child_total_time_running;
626
627 /*
628 * Protect attach/detach and child_list:
629 */
630 struct mutex child_mutex;
631 struct list_head child_list;
632 struct perf_event *parent;
633
634 int oncpu;
635 int cpu;
636
637 struct list_head owner_entry;
638 struct task_struct *owner;
639
640 /* mmap bits */
641 struct mutex mmap_mutex;
642 atomic_t mmap_count;
643 struct perf_mmap_data *data;
644
645 /* poll related */
646 wait_queue_head_t waitq;
647 struct fasync_struct *fasync;
648
649 /* delayed work for NMIs and such */
650 int pending_wakeup;
651 int pending_kill;
652 int pending_disable;
653 struct perf_pending_entry pending;
654
655 atomic_t event_limit;
656
657 void (*destroy)(struct perf_event *);
658 struct rcu_head rcu_head;
659
660 struct pid_namespace *ns;
661 u64 id;
662
663 void (*overflow_handler)(struct perf_event *event,
664 int nmi, struct perf_sample_data *data,
665 struct pt_regs *regs);
666
667 #ifdef CONFIG_EVENT_PROFILE
668 struct event_filter *filter;
669 #endif
670
671 perf_callback_t callback;
672
673 perf_callback_t event_callback;
674
675 #endif /* CONFIG_PERF_EVENTS */
676 };
677
678 /**
679 * struct perf_event_context - event context structure
680 *
681 * Used as a container for task events and CPU events as well:
682 */
683 struct perf_event_context {
684 /*
685 * Protect the states of the events in the list,
686 * nr_active, and the list:
687 */
688 spinlock_t lock;
689 /*
690 * Protect the list of events. Locking either mutex or lock
691 * is sufficient to ensure the list doesn't change; to change
692 * the list you need to lock both the mutex and the spinlock.
693 */
694 struct mutex mutex;
695
696 struct list_head group_list;
697 struct list_head event_list;
698 int nr_events;
699 int nr_active;
700 int is_active;
701 int nr_stat;
702 atomic_t refcount;
703 struct task_struct *task;
704
705 /*
706 * Context clock, runs when context enabled.
707 */
708 u64 time;
709 u64 timestamp;
710
711 /*
712 * These fields let us detect when two contexts have both
713 * been cloned (inherited) from a common ancestor.
714 */
715 struct perf_event_context *parent_ctx;
716 u64 parent_gen;
717 u64 generation;
718 int pin_count;
719 struct rcu_head rcu_head;
720 };
721
722 /**
723 * struct perf_event_cpu_context - per cpu event context structure
724 */
725 struct perf_cpu_context {
726 struct perf_event_context ctx;
727 struct perf_event_context *task_ctx;
728 int active_oncpu;
729 int max_pertask;
730 int exclusive;
731
732 /*
733 * Recursion avoidance:
734 *
735 * task, softirq, irq, nmi context
736 */
737 int recursion[4];
738 };
739
740 struct perf_output_handle {
741 struct perf_event *event;
742 struct perf_mmap_data *data;
743 unsigned long head;
744 unsigned long offset;
745 int nmi;
746 int sample;
747 int locked;
748 };
749
750 #ifdef CONFIG_PERF_EVENTS
751
752 /*
753 * Set by architecture code:
754 */
755 extern int perf_max_events;
756
757 extern const struct pmu *hw_perf_event_init(struct perf_event *event);
758
759 extern void perf_event_task_sched_in(struct task_struct *task, int cpu);
760 extern void perf_event_task_sched_out(struct task_struct *task,
761 struct task_struct *next, int cpu);
762 extern void perf_event_task_tick(struct task_struct *task, int cpu);
763 extern int perf_event_init_task(struct task_struct *child);
764 extern void perf_event_exit_task(struct task_struct *child);
765 extern void perf_event_free_task(struct task_struct *task);
766 extern void set_perf_event_pending(void);
767 extern void perf_event_do_pending(void);
768 extern void perf_event_print_debug(void);
769 extern void __perf_disable(void);
770 extern bool __perf_enable(void);
771 extern void perf_disable(void);
772 extern void perf_enable(void);
773 extern int perf_event_task_disable(void);
774 extern int perf_event_task_enable(void);
775 extern int hw_perf_group_sched_in(struct perf_event *group_leader,
776 struct perf_cpu_context *cpuctx,
777 struct perf_event_context *ctx, int cpu);
778 extern void perf_event_update_userpage(struct perf_event *event);
779 extern int perf_event_release_kernel(struct perf_event *event);
780 extern struct perf_event *
781 perf_event_create_kernel_counter(struct perf_event_attr *attr,
782 int cpu,
783 pid_t pid,
784 perf_callback_t callback);
785 extern u64 perf_event_read_value(struct perf_event *event,
786 u64 *enabled, u64 *running);
787
788 struct perf_sample_data {
789 u64 type;
790
791 u64 ip;
792 struct {
793 u32 pid;
794 u32 tid;
795 } tid_entry;
796 u64 time;
797 u64 addr;
798 u64 id;
799 u64 stream_id;
800 struct {
801 u32 cpu;
802 u32 reserved;
803 } cpu_entry;
804 u64 period;
805 struct perf_callchain_entry *callchain;
806 struct perf_raw_record *raw;
807 };
808
809 extern void perf_output_sample(struct perf_output_handle *handle,
810 struct perf_event_header *header,
811 struct perf_sample_data *data,
812 struct perf_event *event);
813 extern void perf_prepare_sample(struct perf_event_header *header,
814 struct perf_sample_data *data,
815 struct perf_event *event,
816 struct pt_regs *regs);
817
818 extern int perf_event_overflow(struct perf_event *event, int nmi,
819 struct perf_sample_data *data,
820 struct pt_regs *regs);
821
822 /*
823 * Return 1 for a software event, 0 for a hardware event
824 */
825 static inline int is_software_event(struct perf_event *event)
826 {
827 return (event->attr.type != PERF_TYPE_RAW) &&
828 (event->attr.type != PERF_TYPE_HARDWARE) &&
829 (event->attr.type != PERF_TYPE_HW_CACHE);
830 }
831
832 extern atomic_t perf_swevent_enabled[PERF_COUNT_SW_MAX];
833
834 extern void __perf_sw_event(u32, u64, int, struct pt_regs *, u64);
835
836 static inline void
837 perf_sw_event(u32 event_id, u64 nr, int nmi, struct pt_regs *regs, u64 addr)
838 {
839 if (atomic_read(&perf_swevent_enabled[event_id]))
840 __perf_sw_event(event_id, nr, nmi, regs, addr);
841 }
842
843 extern void __perf_event_mmap(struct vm_area_struct *vma);
844
845 static inline void perf_event_mmap(struct vm_area_struct *vma)
846 {
847 if (vma->vm_flags & VM_EXEC)
848 __perf_event_mmap(vma);
849 }
850
851 extern void perf_event_comm(struct task_struct *tsk);
852 extern void perf_event_fork(struct task_struct *tsk);
853
854 extern struct perf_callchain_entry *perf_callchain(struct pt_regs *regs);
855
856 extern int sysctl_perf_event_paranoid;
857 extern int sysctl_perf_event_mlock;
858 extern int sysctl_perf_event_sample_rate;
859
860 extern void perf_event_init(void);
861 extern void perf_tp_event(int event_id, u64 addr, u64 count,
862 void *record, int entry_size);
863 extern void perf_bp_event(struct perf_event *event, void *data);
864
865 #ifndef perf_misc_flags
866 #define perf_misc_flags(regs) (user_mode(regs) ? PERF_RECORD_MISC_USER : \
867 PERF_RECORD_MISC_KERNEL)
868 #define perf_instruction_pointer(regs) instruction_pointer(regs)
869 #endif
870
871 extern int perf_output_begin(struct perf_output_handle *handle,
872 struct perf_event *event, unsigned int size,
873 int nmi, int sample);
874 extern void perf_output_end(struct perf_output_handle *handle);
875 extern void perf_output_copy(struct perf_output_handle *handle,
876 const void *buf, unsigned int len);
877 extern int perf_swevent_get_recursion_context(void);
878 extern void perf_swevent_put_recursion_context(int rctx);
879 #else
880 static inline void
881 perf_event_task_sched_in(struct task_struct *task, int cpu) { }
882 static inline void
883 perf_event_task_sched_out(struct task_struct *task,
884 struct task_struct *next, int cpu) { }
885 static inline void
886 perf_event_task_tick(struct task_struct *task, int cpu) { }
887 static inline int perf_event_init_task(struct task_struct *child) { return 0; }
888 static inline void perf_event_exit_task(struct task_struct *child) { }
889 static inline void perf_event_free_task(struct task_struct *task) { }
890 static inline void perf_event_do_pending(void) { }
891 static inline void perf_event_print_debug(void) { }
892 static inline void perf_disable(void) { }
893 static inline void perf_enable(void) { }
894 static inline int perf_event_task_disable(void) { return -EINVAL; }
895 static inline int perf_event_task_enable(void) { return -EINVAL; }
896
897 static inline void
898 perf_sw_event(u32 event_id, u64 nr, int nmi,
899 struct pt_regs *regs, u64 addr) { }
900 static inline void
901 perf_bp_event(struct perf_event *event, void *data) { }
902
903 static inline void perf_event_mmap(struct vm_area_struct *vma) { }
904 static inline void perf_event_comm(struct task_struct *tsk) { }
905 static inline void perf_event_fork(struct task_struct *tsk) { }
906 static inline void perf_event_init(void) { }
907 static inline int perf_swevent_get_recursion_context(void) { return -1; }
908 static inline void perf_swevent_put_recursion_context(int rctx) { }
909
910 #endif
911
912 #define perf_output_put(handle, x) \
913 perf_output_copy((handle), &(x), sizeof(x))
914
915 #endif /* __KERNEL__ */
916 #endif /* _LINUX_PERF_EVENT_H */
Linus' kernel tree