perf_counter: PERF_SAMPLE_ID and inherited counters
[linux-2.6.git] / include / linux / perf_counter.h
1 /*
2  *  Performance counters:
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_COUNTER_H
15 #define _LINUX_PERF_COUNTER_H
16
17 #include <linux/types.h>
18 #include <linux/ioctl.h>
19 #include <asm/byteorder.h>
20
21 /*
22  * User-space ABI bits:
23  */
24
25 /*
26  * attr.type
27  */
28 enum perf_type_id {
29         PERF_TYPE_HARDWARE                      = 0,
30         PERF_TYPE_SOFTWARE                      = 1,
31         PERF_TYPE_TRACEPOINT                    = 2,
32         PERF_TYPE_HW_CACHE                      = 3,
33         PERF_TYPE_RAW                           = 4,
34
35         PERF_TYPE_MAX,                          /* non-ABI */
36 };
37
38 /*
39  * Generalized performance counter event types, used by the
40  * attr.event_id parameter of the sys_perf_counter_open()
41  * syscall:
42  */
43 enum perf_hw_id {
44         /*
45          * Common hardware events, generalized by the kernel:
46          */
47         PERF_COUNT_HW_CPU_CYCLES                = 0,
48         PERF_COUNT_HW_INSTRUCTIONS              = 1,
49         PERF_COUNT_HW_CACHE_REFERENCES          = 2,
50         PERF_COUNT_HW_CACHE_MISSES              = 3,
51         PERF_COUNT_HW_BRANCH_INSTRUCTIONS       = 4,
52         PERF_COUNT_HW_BRANCH_MISSES             = 5,
53         PERF_COUNT_HW_BUS_CYCLES                = 6,
54
55         PERF_COUNT_HW_MAX,                      /* non-ABI */
56 };
57
58 /*
59  * Generalized hardware cache counters:
60  *
61  *       { L1-D, L1-I, LLC, ITLB, DTLB, BPU } x
62  *       { read, write, prefetch } x
63  *       { accesses, misses }
64  */
65 enum perf_hw_cache_id {
66         PERF_COUNT_HW_CACHE_L1D                 = 0,
67         PERF_COUNT_HW_CACHE_L1I                 = 1,
68         PERF_COUNT_HW_CACHE_LL                  = 2,
69         PERF_COUNT_HW_CACHE_DTLB                = 3,
70         PERF_COUNT_HW_CACHE_ITLB                = 4,
71         PERF_COUNT_HW_CACHE_BPU                 = 5,
72
73         PERF_COUNT_HW_CACHE_MAX,                /* non-ABI */
74 };
75
76 enum perf_hw_cache_op_id {
77         PERF_COUNT_HW_CACHE_OP_READ             = 0,
78         PERF_COUNT_HW_CACHE_OP_WRITE            = 1,
79         PERF_COUNT_HW_CACHE_OP_PREFETCH         = 2,
80
81         PERF_COUNT_HW_CACHE_OP_MAX,             /* non-ABI */
82 };
83
84 enum perf_hw_cache_op_result_id {
85         PERF_COUNT_HW_CACHE_RESULT_ACCESS       = 0,
86         PERF_COUNT_HW_CACHE_RESULT_MISS         = 1,
87
88         PERF_COUNT_HW_CACHE_RESULT_MAX,         /* non-ABI */
89 };
90
91 /*
92  * Special "software" counters provided by the kernel, even if the hardware
93  * does not support performance counters. These counters measure various
94  * physical and sw events of the kernel (and allow the profiling of them as
95  * well):
96  */
97 enum perf_sw_ids {
98         PERF_COUNT_SW_CPU_CLOCK                 = 0,
99         PERF_COUNT_SW_TASK_CLOCK                = 1,
100         PERF_COUNT_SW_PAGE_FAULTS               = 2,
101         PERF_COUNT_SW_CONTEXT_SWITCHES          = 3,
102         PERF_COUNT_SW_CPU_MIGRATIONS            = 4,
103         PERF_COUNT_SW_PAGE_FAULTS_MIN           = 5,
104         PERF_COUNT_SW_PAGE_FAULTS_MAJ           = 6,
105
106         PERF_COUNT_SW_MAX,                      /* non-ABI */
107 };
108
109 /*
110  * Bits that can be set in attr.sample_type to request information
111  * in the overflow packets.
112  */
113 enum perf_counter_sample_format {
114         PERF_SAMPLE_IP                          = 1U << 0,
115         PERF_SAMPLE_TID                         = 1U << 1,
116         PERF_SAMPLE_TIME                        = 1U << 2,
117         PERF_SAMPLE_ADDR                        = 1U << 3,
118         PERF_SAMPLE_GROUP                       = 1U << 4,
119         PERF_SAMPLE_CALLCHAIN                   = 1U << 5,
120         PERF_SAMPLE_ID                          = 1U << 6,
121         PERF_SAMPLE_CPU                         = 1U << 7,
122         PERF_SAMPLE_PERIOD                      = 1U << 8,
123         PERF_SAMPLE_STREAM_ID                   = 1U << 9,
124
125         PERF_SAMPLE_MAX = 1U << 10,             /* non-ABI */
126 };
127
128 /*
129  * Bits that can be set in attr.read_format to request that
130  * reads on the counter should return the indicated quantities,
131  * in increasing order of bit value, after the counter value.
132  */
133 enum perf_counter_read_format {
134         PERF_FORMAT_TOTAL_TIME_ENABLED          = 1U << 0,
135         PERF_FORMAT_TOTAL_TIME_RUNNING          = 1U << 1,
136         PERF_FORMAT_ID                          = 1U << 2,
137
138         PERF_FORMAT_MAX = 1U << 3,              /* non-ABI */
139 };
140
141 #define PERF_ATTR_SIZE_VER0     64      /* sizeof first published struct */
142
143 /*
144  * Hardware event to monitor via a performance monitoring counter:
145  */
146 struct perf_counter_attr {
147
148         /*
149          * Major type: hardware/software/tracepoint/etc.
150          */
151         __u32                   type;
152
153         /*
154          * Size of the attr structure, for fwd/bwd compat.
155          */
156         __u32                   size;
157
158         /*
159          * Type specific configuration information.
160          */
161         __u64                   config;
162
163         union {
164                 __u64           sample_period;
165                 __u64           sample_freq;
166         };
167
168         __u64                   sample_type;
169         __u64                   read_format;
170
171         __u64                   disabled       :  1, /* off by default        */
172                                 inherit        :  1, /* children inherit it   */
173                                 pinned         :  1, /* must always be on PMU */
174                                 exclusive      :  1, /* only group on PMU     */
175                                 exclude_user   :  1, /* don't count user      */
176                                 exclude_kernel :  1, /* ditto kernel          */
177                                 exclude_hv     :  1, /* ditto hypervisor      */
178                                 exclude_idle   :  1, /* don't count when idle */
179                                 mmap           :  1, /* include mmap data     */
180                                 comm           :  1, /* include comm data     */
181                                 freq           :  1, /* use freq, not period  */
182                                 inherit_stat   :  1, /* per task counts       */
183                                 enable_on_exec :  1, /* next exec enables     */
184
185                                 __reserved_1   : 51;
186
187         __u32                   wakeup_events;  /* wakeup every n events */
188         __u32                   __reserved_2;
189
190         __u64                   __reserved_3;
191 };
192
193 /*
194  * Ioctls that can be done on a perf counter fd:
195  */
196 #define PERF_COUNTER_IOC_ENABLE         _IO ('$', 0)
197 #define PERF_COUNTER_IOC_DISABLE        _IO ('$', 1)
198 #define PERF_COUNTER_IOC_REFRESH        _IO ('$', 2)
199 #define PERF_COUNTER_IOC_RESET          _IO ('$', 3)
200 #define PERF_COUNTER_IOC_PERIOD         _IOW('$', 4, u64)
201
202 enum perf_counter_ioc_flags {
203         PERF_IOC_FLAG_GROUP             = 1U << 0,
204 };
205
206 /*
207  * Structure of the page that can be mapped via mmap
208  */
209 struct perf_counter_mmap_page {
210         __u32   version;                /* version number of this structure */
211         __u32   compat_version;         /* lowest version this is compat with */
212
213         /*
214          * Bits needed to read the hw counters in user-space.
215          *
216          *   u32 seq;
217          *   s64 count;
218          *
219          *   do {
220          *     seq = pc->lock;
221          *
222          *     barrier()
223          *     if (pc->index) {
224          *       count = pmc_read(pc->index - 1);
225          *       count += pc->offset;
226          *     } else
227          *       goto regular_read;
228          *
229          *     barrier();
230          *   } while (pc->lock != seq);
231          *
232          * NOTE: for obvious reason this only works on self-monitoring
233          *       processes.
234          */
235         __u32   lock;                   /* seqlock for synchronization */
236         __u32   index;                  /* hardware counter identifier */
237         __s64   offset;                 /* add to hardware counter value */
238         __u64   time_enabled;           /* time counter active */
239         __u64   time_running;           /* time counter on cpu */
240
241                 /*
242                  * Hole for extension of the self monitor capabilities
243                  */
244
245         __u64   __reserved[123];        /* align to 1k */
246
247         /*
248          * Control data for the mmap() data buffer.
249          *
250          * User-space reading the @data_head value should issue an rmb(), on
251          * SMP capable platforms, after reading this value -- see
252          * perf_counter_wakeup().
253          *
254          * When the mapping is PROT_WRITE the @data_tail value should be
255          * written by userspace to reflect the last read data. In this case
256          * the kernel will not over-write unread data.
257          */
258         __u64   data_head;              /* head in the data section */
259         __u64   data_tail;              /* user-space written tail */
260 };
261
262 #define PERF_EVENT_MISC_CPUMODE_MASK            (3 << 0)
263 #define PERF_EVENT_MISC_CPUMODE_UNKNOWN         (0 << 0)
264 #define PERF_EVENT_MISC_KERNEL                  (1 << 0)
265 #define PERF_EVENT_MISC_USER                    (2 << 0)
266 #define PERF_EVENT_MISC_HYPERVISOR              (3 << 0)
267
268 struct perf_event_header {
269         __u32   type;
270         __u16   misc;
271         __u16   size;
272 };
273
274 enum perf_event_type {
275
276         /*
277          * The MMAP events record the PROT_EXEC mappings so that we can
278          * correlate userspace IPs to code. They have the following structure:
279          *
280          * struct {
281          *      struct perf_event_header        header;
282          *
283          *      u32                             pid, tid;
284          *      u64                             addr;
285          *      u64                             len;
286          *      u64                             pgoff;
287          *      char                            filename[];
288          * };
289          */
290         PERF_EVENT_MMAP                 = 1,
291
292         /*
293          * struct {
294          *      struct perf_event_header        header;
295          *      u64                             id;
296          *      u64                             lost;
297          * };
298          */
299         PERF_EVENT_LOST                 = 2,
300
301         /*
302          * struct {
303          *      struct perf_event_header        header;
304          *
305          *      u32                             pid, tid;
306          *      char                            comm[];
307          * };
308          */
309         PERF_EVENT_COMM                 = 3,
310
311         /*
312          * struct {
313          *      struct perf_event_header        header;
314          *      u64                             time;
315          *      u64                             id;
316          *      u64                             stream_id;
317          * };
318          */
319         PERF_EVENT_THROTTLE             = 5,
320         PERF_EVENT_UNTHROTTLE           = 6,
321
322         /*
323          * struct {
324          *      struct perf_event_header        header;
325          *      u32                             pid, ppid;
326          * };
327          */
328         PERF_EVENT_FORK                 = 7,
329
330         /*
331          * struct {
332          *      struct perf_event_header        header;
333          *      u32                             pid, tid;
334          *      u64                             value;
335          *      { u64           time_enabled;   } && PERF_FORMAT_ENABLED
336          *      { u64           time_running;   } && PERF_FORMAT_RUNNING
337          *      { u64           parent_id;      } && PERF_FORMAT_ID
338          * };
339          */
340         PERF_EVENT_READ                 = 8,
341
342         /*
343          * struct {
344          *      struct perf_event_header        header;
345          *
346          *      { u64                   ip;       } && PERF_SAMPLE_IP
347          *      { u32                   pid, tid; } && PERF_SAMPLE_TID
348          *      { u64                   time;     } && PERF_SAMPLE_TIME
349          *      { u64                   addr;     } && PERF_SAMPLE_ADDR
350          *      { u64                   id;       } && PERF_SAMPLE_ID
351          *      { u64                   stream_id;} && PERF_SAMPLE_STREAM_ID
352          *      { u32                   cpu, res; } && PERF_SAMPLE_CPU
353          *      { u64                   period;   } && PERF_SAMPLE_PERIOD
354          *
355          *      { u64                   nr;
356          *        { u64 id, val; }      cnt[nr];  } && PERF_SAMPLE_GROUP
357          *
358          *      { u64                   nr,
359          *        u64                   ips[nr];  } && PERF_SAMPLE_CALLCHAIN
360          * };
361          */
362         PERF_EVENT_SAMPLE               = 9,
363
364         PERF_EVENT_MAX,                 /* non-ABI */
365 };
366
367 enum perf_callchain_context {
368         PERF_CONTEXT_HV                 = (__u64)-32,
369         PERF_CONTEXT_KERNEL             = (__u64)-128,
370         PERF_CONTEXT_USER               = (__u64)-512,
371
372         PERF_CONTEXT_GUEST              = (__u64)-2048,
373         PERF_CONTEXT_GUEST_KERNEL       = (__u64)-2176,
374         PERF_CONTEXT_GUEST_USER         = (__u64)-2560,
375
376         PERF_CONTEXT_MAX                = (__u64)-4095,
377 };
378
379 #ifdef __KERNEL__
380 /*
381  * Kernel-internal data types and definitions:
382  */
383
384 #ifdef CONFIG_PERF_COUNTERS
385 # include <asm/perf_counter.h>
386 #endif
387
388 #include <linux/list.h>
389 #include <linux/mutex.h>
390 #include <linux/rculist.h>
391 #include <linux/rcupdate.h>
392 #include <linux/spinlock.h>
393 #include <linux/hrtimer.h>
394 #include <linux/fs.h>
395 #include <linux/pid_namespace.h>
396 #include <asm/atomic.h>
397
398 #define PERF_MAX_STACK_DEPTH            255
399
400 struct perf_callchain_entry {
401         __u64                           nr;
402         __u64                           ip[PERF_MAX_STACK_DEPTH];
403 };
404
405 struct task_struct;
406
407 /**
408  * struct hw_perf_counter - performance counter hardware details:
409  */
410 struct hw_perf_counter {
411 #ifdef CONFIG_PERF_COUNTERS
412         union {
413                 struct { /* hardware */
414                         u64             config;
415                         unsigned long   config_base;
416                         unsigned long   counter_base;
417                         int             idx;
418                 };
419                 union { /* software */
420                         atomic64_t      count;
421                         struct hrtimer  hrtimer;
422                 };
423         };
424         atomic64_t                      prev_count;
425         u64                             sample_period;
426         u64                             last_period;
427         atomic64_t                      period_left;
428         u64                             interrupts;
429
430         u64                             freq_count;
431         u64                             freq_interrupts;
432         u64                             freq_stamp;
433 #endif
434 };
435
436 struct perf_counter;
437
438 /**
439  * struct pmu - generic performance monitoring unit
440  */
441 struct pmu {
442         int (*enable)                   (struct perf_counter *counter);
443         void (*disable)                 (struct perf_counter *counter);
444         void (*read)                    (struct perf_counter *counter);
445         void (*unthrottle)              (struct perf_counter *counter);
446 };
447
448 /**
449  * enum perf_counter_active_state - the states of a counter
450  */
451 enum perf_counter_active_state {
452         PERF_COUNTER_STATE_ERROR        = -2,
453         PERF_COUNTER_STATE_OFF          = -1,
454         PERF_COUNTER_STATE_INACTIVE     =  0,
455         PERF_COUNTER_STATE_ACTIVE       =  1,
456 };
457
458 struct file;
459
460 struct perf_mmap_data {
461         struct rcu_head                 rcu_head;
462         int                             nr_pages;       /* nr of data pages  */
463         int                             writable;       /* are we writable   */
464         int                             nr_locked;      /* nr pages mlocked  */
465
466         atomic_t                        poll;           /* POLL_ for wakeups */
467         atomic_t                        events;         /* event limit       */
468
469         atomic_long_t                   head;           /* write position    */
470         atomic_long_t                   done_head;      /* completed head    */
471
472         atomic_t                        lock;           /* concurrent writes */
473         atomic_t                        wakeup;         /* needs a wakeup    */
474         atomic_t                        lost;           /* nr records lost   */
475
476         struct perf_counter_mmap_page   *user_page;
477         void                            *data_pages[0];
478 };
479
480 struct perf_pending_entry {
481         struct perf_pending_entry *next;
482         void (*func)(struct perf_pending_entry *);
483 };
484
485 /**
486  * struct perf_counter - performance counter kernel representation:
487  */
488 struct perf_counter {
489 #ifdef CONFIG_PERF_COUNTERS
490         struct list_head                list_entry;
491         struct list_head                event_entry;
492         struct list_head                sibling_list;
493         int                             nr_siblings;
494         struct perf_counter             *group_leader;
495         const struct pmu                *pmu;
496
497         enum perf_counter_active_state  state;
498         atomic64_t                      count;
499
500         /*
501          * These are the total time in nanoseconds that the counter
502          * has been enabled (i.e. eligible to run, and the task has
503          * been scheduled in, if this is a per-task counter)
504          * and running (scheduled onto the CPU), respectively.
505          *
506          * They are computed from tstamp_enabled, tstamp_running and
507          * tstamp_stopped when the counter is in INACTIVE or ACTIVE state.
508          */
509         u64                             total_time_enabled;
510         u64                             total_time_running;
511
512         /*
513          * These are timestamps used for computing total_time_enabled
514          * and total_time_running when the counter is in INACTIVE or
515          * ACTIVE state, measured in nanoseconds from an arbitrary point
516          * in time.
517          * tstamp_enabled: the notional time when the counter was enabled
518          * tstamp_running: the notional time when the counter was scheduled on
519          * tstamp_stopped: in INACTIVE state, the notional time when the
520          *      counter was scheduled off.
521          */
522         u64                             tstamp_enabled;
523         u64                             tstamp_running;
524         u64                             tstamp_stopped;
525
526         struct perf_counter_attr        attr;
527         struct hw_perf_counter          hw;
528
529         struct perf_counter_context     *ctx;
530         struct file                     *filp;
531
532         /*
533          * These accumulate total time (in nanoseconds) that children
534          * counters have been enabled and running, respectively.
535          */
536         atomic64_t                      child_total_time_enabled;
537         atomic64_t                      child_total_time_running;
538
539         /*
540          * Protect attach/detach and child_list:
541          */
542         struct mutex                    child_mutex;
543         struct list_head                child_list;
544         struct perf_counter             *parent;
545
546         int                             oncpu;
547         int                             cpu;
548
549         struct list_head                owner_entry;
550         struct task_struct              *owner;
551
552         /* mmap bits */
553         struct mutex                    mmap_mutex;
554         atomic_t                        mmap_count;
555         struct perf_mmap_data           *data;
556
557         /* poll related */
558         wait_queue_head_t               waitq;
559         struct fasync_struct            *fasync;
560
561         /* delayed work for NMIs and such */
562         int                             pending_wakeup;
563         int                             pending_kill;
564         int                             pending_disable;
565         struct perf_pending_entry       pending;
566
567         atomic_t                        event_limit;
568
569         void (*destroy)(struct perf_counter *);
570         struct rcu_head                 rcu_head;
571
572         struct pid_namespace            *ns;
573         u64                             id;
574 #endif
575 };
576
577 /**
578  * struct perf_counter_context - counter context structure
579  *
580  * Used as a container for task counters and CPU counters as well:
581  */
582 struct perf_counter_context {
583         /*
584          * Protect the states of the counters in the list,
585          * nr_active, and the list:
586          */
587         spinlock_t                      lock;
588         /*
589          * Protect the list of counters.  Locking either mutex or lock
590          * is sufficient to ensure the list doesn't change; to change
591          * the list you need to lock both the mutex and the spinlock.
592          */
593         struct mutex                    mutex;
594
595         struct list_head                counter_list;
596         struct list_head                event_list;
597         int                             nr_counters;
598         int                             nr_active;
599         int                             is_active;
600         int                             nr_stat;
601         atomic_t                        refcount;
602         struct task_struct              *task;
603
604         /*
605          * Context clock, runs when context enabled.
606          */
607         u64                             time;
608         u64                             timestamp;
609
610         /*
611          * These fields let us detect when two contexts have both
612          * been cloned (inherited) from a common ancestor.
613          */
614         struct perf_counter_context     *parent_ctx;
615         u64                             parent_gen;
616         u64                             generation;
617         int                             pin_count;
618         struct rcu_head                 rcu_head;
619 };
620
621 /**
622  * struct perf_counter_cpu_context - per cpu counter context structure
623  */
624 struct perf_cpu_context {
625         struct perf_counter_context     ctx;
626         struct perf_counter_context     *task_ctx;
627         int                             active_oncpu;
628         int                             max_pertask;
629         int                             exclusive;
630
631         /*
632          * Recursion avoidance:
633          *
634          * task, softirq, irq, nmi context
635          */
636         int                             recursion[4];
637 };
638
639 #ifdef CONFIG_PERF_COUNTERS
640
641 /*
642  * Set by architecture code:
643  */
644 extern int perf_max_counters;
645
646 extern const struct pmu *hw_perf_counter_init(struct perf_counter *counter);
647
648 extern void perf_counter_task_sched_in(struct task_struct *task, int cpu);
649 extern void perf_counter_task_sched_out(struct task_struct *task,
650                                         struct task_struct *next, int cpu);
651 extern void perf_counter_task_tick(struct task_struct *task, int cpu);
652 extern int perf_counter_init_task(struct task_struct *child);
653 extern void perf_counter_exit_task(struct task_struct *child);
654 extern void perf_counter_free_task(struct task_struct *task);
655 extern void set_perf_counter_pending(void);
656 extern void perf_counter_do_pending(void);
657 extern void perf_counter_print_debug(void);
658 extern void __perf_disable(void);
659 extern bool __perf_enable(void);
660 extern void perf_disable(void);
661 extern void perf_enable(void);
662 extern int perf_counter_task_disable(void);
663 extern int perf_counter_task_enable(void);
664 extern int hw_perf_group_sched_in(struct perf_counter *group_leader,
665                struct perf_cpu_context *cpuctx,
666                struct perf_counter_context *ctx, int cpu);
667 extern void perf_counter_update_userpage(struct perf_counter *counter);
668
669 struct perf_sample_data {
670         struct pt_regs                  *regs;
671         u64                             addr;
672         u64                             period;
673 };
674
675 extern int perf_counter_overflow(struct perf_counter *counter, int nmi,
676                                  struct perf_sample_data *data);
677
678 /*
679  * Return 1 for a software counter, 0 for a hardware counter
680  */
681 static inline int is_software_counter(struct perf_counter *counter)
682 {
683         return (counter->attr.type != PERF_TYPE_RAW) &&
684                 (counter->attr.type != PERF_TYPE_HARDWARE) &&
685                 (counter->attr.type != PERF_TYPE_HW_CACHE);
686 }
687
688 extern atomic_t perf_swcounter_enabled[PERF_COUNT_SW_MAX];
689
690 extern void __perf_swcounter_event(u32, u64, int, struct pt_regs *, u64);
691
692 static inline void
693 perf_swcounter_event(u32 event, u64 nr, int nmi, struct pt_regs *regs, u64 addr)
694 {
695         if (atomic_read(&perf_swcounter_enabled[event]))
696                 __perf_swcounter_event(event, nr, nmi, regs, addr);
697 }
698
699 extern void __perf_counter_mmap(struct vm_area_struct *vma);
700
701 static inline void perf_counter_mmap(struct vm_area_struct *vma)
702 {
703         if (vma->vm_flags & VM_EXEC)
704                 __perf_counter_mmap(vma);
705 }
706
707 extern void perf_counter_comm(struct task_struct *tsk);
708 extern void perf_counter_fork(struct task_struct *tsk);
709
710 extern struct perf_callchain_entry *perf_callchain(struct pt_regs *regs);
711
712 extern int sysctl_perf_counter_paranoid;
713 extern int sysctl_perf_counter_mlock;
714 extern int sysctl_perf_counter_sample_rate;
715
716 extern void perf_counter_init(void);
717
718 #ifndef perf_misc_flags
719 #define perf_misc_flags(regs)   (user_mode(regs) ? PERF_EVENT_MISC_USER : \
720                                  PERF_EVENT_MISC_KERNEL)
721 #define perf_instruction_pointer(regs)  instruction_pointer(regs)
722 #endif
723
724 #else
725 static inline void
726 perf_counter_task_sched_in(struct task_struct *task, int cpu)           { }
727 static inline void
728 perf_counter_task_sched_out(struct task_struct *task,
729                             struct task_struct *next, int cpu)          { }
730 static inline void
731 perf_counter_task_tick(struct task_struct *task, int cpu)               { }
732 static inline int perf_counter_init_task(struct task_struct *child)     { return 0; }
733 static inline void perf_counter_exit_task(struct task_struct *child)    { }
734 static inline void perf_counter_free_task(struct task_struct *task)     { }
735 static inline void perf_counter_do_pending(void)                        { }
736 static inline void perf_counter_print_debug(void)                       { }
737 static inline void perf_disable(void)                                   { }
738 static inline void perf_enable(void)                                    { }
739 static inline int perf_counter_task_disable(void)       { return -EINVAL; }
740 static inline int perf_counter_task_enable(void)        { return -EINVAL; }
741
742 static inline void
743 perf_swcounter_event(u32 event, u64 nr, int nmi,
744                      struct pt_regs *regs, u64 addr)                    { }
745
746 static inline void perf_counter_mmap(struct vm_area_struct *vma)        { }
747 static inline void perf_counter_comm(struct task_struct *tsk)           { }
748 static inline void perf_counter_fork(struct task_struct *tsk)           { }
749 static inline void perf_counter_init(void)                              { }
750 #endif
751
752 #endif /* __KERNEL__ */
753 #endif /* _LINUX_PERF_COUNTER_H */