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
8 * Data type definitions, declarations, prototypes.
10 * Started by: Thomas Gleixner and Ingo Molnar
12 * For licencing details see kernel-base/COPYING
14 #ifndef _LINUX_PERF_EVENT_H
15 #define _LINUX_PERF_EVENT_H
17 #include <linux/types.h>
18 #include <linux/ioctl.h>
19 #include <asm/byteorder.h>
22 * User-space ABI bits:
29 PERF_TYPE_HARDWARE
= 0,
30 PERF_TYPE_SOFTWARE
= 1,
31 PERF_TYPE_TRACEPOINT
= 2,
32 PERF_TYPE_HW_CACHE
= 3,
34 PERF_TYPE_BREAKPOINT
= 5,
36 PERF_TYPE_MAX
, /* non-ABI */
40 * Generalized performance event event_id types, used by the
41 * attr.event_id parameter of the sys_perf_event_open()
46 * Common hardware events, generalized by the kernel:
48 PERF_COUNT_HW_CPU_CYCLES
= 0,
49 PERF_COUNT_HW_INSTRUCTIONS
= 1,
50 PERF_COUNT_HW_CACHE_REFERENCES
= 2,
51 PERF_COUNT_HW_CACHE_MISSES
= 3,
52 PERF_COUNT_HW_BRANCH_INSTRUCTIONS
= 4,
53 PERF_COUNT_HW_BRANCH_MISSES
= 5,
54 PERF_COUNT_HW_BUS_CYCLES
= 6,
56 PERF_COUNT_HW_MAX
, /* non-ABI */
60 * Generalized hardware cache events:
62 * { L1-D, L1-I, LLC, ITLB, DTLB, BPU } x
63 * { read, write, prefetch } x
64 * { accesses, misses }
66 enum perf_hw_cache_id
{
67 PERF_COUNT_HW_CACHE_L1D
= 0,
68 PERF_COUNT_HW_CACHE_L1I
= 1,
69 PERF_COUNT_HW_CACHE_LL
= 2,
70 PERF_COUNT_HW_CACHE_DTLB
= 3,
71 PERF_COUNT_HW_CACHE_ITLB
= 4,
72 PERF_COUNT_HW_CACHE_BPU
= 5,
74 PERF_COUNT_HW_CACHE_MAX
, /* non-ABI */
77 enum perf_hw_cache_op_id
{
78 PERF_COUNT_HW_CACHE_OP_READ
= 0,
79 PERF_COUNT_HW_CACHE_OP_WRITE
= 1,
80 PERF_COUNT_HW_CACHE_OP_PREFETCH
= 2,
82 PERF_COUNT_HW_CACHE_OP_MAX
, /* non-ABI */
85 enum perf_hw_cache_op_result_id
{
86 PERF_COUNT_HW_CACHE_RESULT_ACCESS
= 0,
87 PERF_COUNT_HW_CACHE_RESULT_MISS
= 1,
89 PERF_COUNT_HW_CACHE_RESULT_MAX
, /* non-ABI */
93 * Special "software" events provided by the kernel, even if the hardware
94 * does not support performance events. These events measure various
95 * physical and sw events of the kernel (and allow the profiling of them as
99 PERF_COUNT_SW_CPU_CLOCK
= 0,
100 PERF_COUNT_SW_TASK_CLOCK
= 1,
101 PERF_COUNT_SW_PAGE_FAULTS
= 2,
102 PERF_COUNT_SW_CONTEXT_SWITCHES
= 3,
103 PERF_COUNT_SW_CPU_MIGRATIONS
= 4,
104 PERF_COUNT_SW_PAGE_FAULTS_MIN
= 5,
105 PERF_COUNT_SW_PAGE_FAULTS_MAJ
= 6,
106 PERF_COUNT_SW_ALIGNMENT_FAULTS
= 7,
107 PERF_COUNT_SW_EMULATION_FAULTS
= 8,
109 PERF_COUNT_SW_MAX
, /* non-ABI */
113 * Bits that can be set in attr.sample_type to request information
114 * in the overflow packets.
116 enum perf_event_sample_format
{
117 PERF_SAMPLE_IP
= 1U << 0,
118 PERF_SAMPLE_TID
= 1U << 1,
119 PERF_SAMPLE_TIME
= 1U << 2,
120 PERF_SAMPLE_ADDR
= 1U << 3,
121 PERF_SAMPLE_READ
= 1U << 4,
122 PERF_SAMPLE_CALLCHAIN
= 1U << 5,
123 PERF_SAMPLE_ID
= 1U << 6,
124 PERF_SAMPLE_CPU
= 1U << 7,
125 PERF_SAMPLE_PERIOD
= 1U << 8,
126 PERF_SAMPLE_STREAM_ID
= 1U << 9,
127 PERF_SAMPLE_RAW
= 1U << 10,
129 PERF_SAMPLE_MAX
= 1U << 11, /* non-ABI */
133 * The format of the data returned by read() on a perf event fd,
134 * as specified by attr.read_format:
136 * struct read_format {
138 * { u64 time_enabled; } && PERF_FORMAT_ENABLED
139 * { u64 time_running; } && PERF_FORMAT_RUNNING
140 * { u64 id; } && PERF_FORMAT_ID
141 * } && !PERF_FORMAT_GROUP
144 * { u64 time_enabled; } && PERF_FORMAT_ENABLED
145 * { u64 time_running; } && PERF_FORMAT_RUNNING
147 * { u64 id; } && PERF_FORMAT_ID
149 * } && PERF_FORMAT_GROUP
152 enum perf_event_read_format
{
153 PERF_FORMAT_TOTAL_TIME_ENABLED
= 1U << 0,
154 PERF_FORMAT_TOTAL_TIME_RUNNING
= 1U << 1,
155 PERF_FORMAT_ID
= 1U << 2,
156 PERF_FORMAT_GROUP
= 1U << 3,
158 PERF_FORMAT_MAX
= 1U << 4, /* non-ABI */
161 #define PERF_ATTR_SIZE_VER0 64 /* sizeof first published struct */
164 * Hardware event_id to monitor via a performance monitoring event:
166 struct perf_event_attr
{
169 * Major type: hardware/software/tracepoint/etc.
174 * Size of the attr structure, for fwd/bwd compat.
179 * Type specific configuration information.
191 __u64 disabled
: 1, /* off by default */
192 inherit
: 1, /* children inherit it */
193 pinned
: 1, /* must always be on PMU */
194 exclusive
: 1, /* only group on PMU */
195 exclude_user
: 1, /* don't count user */
196 exclude_kernel
: 1, /* ditto kernel */
197 exclude_hv
: 1, /* ditto hypervisor */
198 exclude_idle
: 1, /* don't count when idle */
199 mmap
: 1, /* include mmap data */
200 comm
: 1, /* include comm data */
201 freq
: 1, /* use freq, not period */
202 inherit_stat
: 1, /* per task counts */
203 enable_on_exec
: 1, /* next exec enables */
204 task
: 1, /* trace fork/exit */
205 watermark
: 1, /* wakeup_watermark */
210 __u32 wakeup_events
; /* wakeup every n events */
211 __u32 wakeup_watermark
; /* bytes before wakeup */
222 * Ioctls that can be done on a perf event fd:
224 #define PERF_EVENT_IOC_ENABLE _IO ('$', 0)
225 #define PERF_EVENT_IOC_DISABLE _IO ('$', 1)
226 #define PERF_EVENT_IOC_REFRESH _IO ('$', 2)
227 #define PERF_EVENT_IOC_RESET _IO ('$', 3)
228 #define PERF_EVENT_IOC_PERIOD _IOW('$', 4, __u64)
229 #define PERF_EVENT_IOC_SET_OUTPUT _IO ('$', 5)
230 #define PERF_EVENT_IOC_SET_FILTER _IOW('$', 6, char *)
232 enum perf_event_ioc_flags
{
233 PERF_IOC_FLAG_GROUP
= 1U << 0,
237 * Structure of the page that can be mapped via mmap
239 struct perf_event_mmap_page
{
240 __u32 version
; /* version number of this structure */
241 __u32 compat_version
; /* lowest version this is compat with */
244 * Bits needed to read the hw events in user-space.
254 * count = pmc_read(pc->index - 1);
255 * count += pc->offset;
260 * } while (pc->lock != seq);
262 * NOTE: for obvious reason this only works on self-monitoring
265 __u32 lock
; /* seqlock for synchronization */
266 __u32 index
; /* hardware event identifier */
267 __s64 offset
; /* add to hardware event value */
268 __u64 time_enabled
; /* time event active */
269 __u64 time_running
; /* time event on cpu */
272 * Hole for extension of the self monitor capabilities
275 __u64 __reserved
[123]; /* align to 1k */
278 * Control data for the mmap() data buffer.
280 * User-space reading the @data_head value should issue an rmb(), on
281 * SMP capable platforms, after reading this value -- see
282 * perf_event_wakeup().
284 * When the mapping is PROT_WRITE the @data_tail value should be
285 * written by userspace to reflect the last read data. In this case
286 * the kernel will not over-write unread data.
288 __u64 data_head
; /* head in the data section */
289 __u64 data_tail
; /* user-space written tail */
292 #define PERF_RECORD_MISC_CPUMODE_MASK (3 << 0)
293 #define PERF_RECORD_MISC_CPUMODE_UNKNOWN (0 << 0)
294 #define PERF_RECORD_MISC_KERNEL (1 << 0)
295 #define PERF_RECORD_MISC_USER (2 << 0)
296 #define PERF_RECORD_MISC_HYPERVISOR (3 << 0)
298 struct perf_event_header
{
304 enum perf_event_type
{
307 * The MMAP events record the PROT_EXEC mappings so that we can
308 * correlate userspace IPs to code. They have the following structure:
311 * struct perf_event_header header;
320 PERF_RECORD_MMAP
= 1,
324 * struct perf_event_header header;
329 PERF_RECORD_LOST
= 2,
333 * struct perf_event_header header;
339 PERF_RECORD_COMM
= 3,
343 * struct perf_event_header header;
349 PERF_RECORD_EXIT
= 4,
353 * struct perf_event_header header;
359 PERF_RECORD_THROTTLE
= 5,
360 PERF_RECORD_UNTHROTTLE
= 6,
364 * struct perf_event_header header;
370 PERF_RECORD_FORK
= 7,
374 * struct perf_event_header header;
377 * struct read_format values;
380 PERF_RECORD_READ
= 8,
384 * struct perf_event_header header;
386 * { u64 ip; } && PERF_SAMPLE_IP
387 * { u32 pid, tid; } && PERF_SAMPLE_TID
388 * { u64 time; } && PERF_SAMPLE_TIME
389 * { u64 addr; } && PERF_SAMPLE_ADDR
390 * { u64 id; } && PERF_SAMPLE_ID
391 * { u64 stream_id;} && PERF_SAMPLE_STREAM_ID
392 * { u32 cpu, res; } && PERF_SAMPLE_CPU
393 * { u64 period; } && PERF_SAMPLE_PERIOD
395 * { struct read_format values; } && PERF_SAMPLE_READ
398 * u64 ips[nr]; } && PERF_SAMPLE_CALLCHAIN
401 * # The RAW record below is opaque data wrt the ABI
403 * # That is, the ABI doesn't make any promises wrt to
404 * # the stability of its content, it may vary depending
405 * # on event, hardware, kernel version and phase of
408 * # In other words, PERF_SAMPLE_RAW contents are not an ABI.
412 * char data[size];}&& PERF_SAMPLE_RAW
415 PERF_RECORD_SAMPLE
= 9,
417 PERF_RECORD_MAX
, /* non-ABI */
420 enum perf_callchain_context
{
421 PERF_CONTEXT_HV
= (__u64
)-32,
422 PERF_CONTEXT_KERNEL
= (__u64
)-128,
423 PERF_CONTEXT_USER
= (__u64
)-512,
425 PERF_CONTEXT_GUEST
= (__u64
)-2048,
426 PERF_CONTEXT_GUEST_KERNEL
= (__u64
)-2176,
427 PERF_CONTEXT_GUEST_USER
= (__u64
)-2560,
429 PERF_CONTEXT_MAX
= (__u64
)-4095,
432 #define PERF_FLAG_FD_NO_GROUP (1U << 0)
433 #define PERF_FLAG_FD_OUTPUT (1U << 1)
437 * Kernel-internal data types and definitions:
440 #ifdef CONFIG_PERF_EVENTS
441 # include <asm/perf_event.h>
444 #ifdef CONFIG_HAVE_HW_BREAKPOINT
445 #include <asm/hw_breakpoint.h>
448 #include <linux/list.h>
449 #include <linux/mutex.h>
450 #include <linux/rculist.h>
451 #include <linux/rcupdate.h>
452 #include <linux/spinlock.h>
453 #include <linux/hrtimer.h>
454 #include <linux/fs.h>
455 #include <linux/pid_namespace.h>
456 #include <linux/workqueue.h>
457 #include <asm/atomic.h>
459 #define PERF_MAX_STACK_DEPTH 255
461 struct perf_callchain_entry
{
463 __u64 ip
[PERF_MAX_STACK_DEPTH
];
466 struct perf_raw_record
{
474 * struct hw_perf_event - performance event hardware details:
476 struct hw_perf_event
{
477 #ifdef CONFIG_PERF_EVENTS
479 struct { /* hardware */
482 unsigned long config_base
;
483 unsigned long event_base
;
487 struct { /* software */
489 struct hrtimer hrtimer
;
491 #ifdef CONFIG_HAVE_HW_BREAKPOINT
492 union { /* breakpoint */
493 struct arch_hw_breakpoint info
;
497 atomic64_t prev_count
;
500 atomic64_t period_left
;
504 u64 freq_count_stamp
;
511 * struct pmu - generic performance monitoring unit
514 int (*enable
) (struct perf_event
*event
);
515 void (*disable
) (struct perf_event
*event
);
516 int (*start
) (struct perf_event
*event
);
517 void (*stop
) (struct perf_event
*event
);
518 void (*read
) (struct perf_event
*event
);
519 void (*unthrottle
) (struct perf_event
*event
);
523 * enum perf_event_active_state - the states of a event
525 enum perf_event_active_state
{
526 PERF_EVENT_STATE_ERROR
= -2,
527 PERF_EVENT_STATE_OFF
= -1,
528 PERF_EVENT_STATE_INACTIVE
= 0,
529 PERF_EVENT_STATE_ACTIVE
= 1,
534 struct perf_mmap_data
{
535 struct rcu_head rcu_head
;
536 #ifdef CONFIG_PERF_USE_VMALLOC
537 struct work_struct work
;
540 int nr_pages
; /* nr of data pages */
541 int writable
; /* are we writable */
542 int nr_locked
; /* nr pages mlocked */
544 atomic_t poll
; /* POLL_ for wakeups */
545 atomic_t events
; /* event_id limit */
547 atomic_long_t head
; /* write position */
548 atomic_long_t done_head
; /* completed head */
550 atomic_t lock
; /* concurrent writes */
551 atomic_t wakeup
; /* needs a wakeup */
552 atomic_t lost
; /* nr records lost */
554 long watermark
; /* wakeup watermark */
556 struct perf_event_mmap_page
*user_page
;
560 struct perf_pending_entry
{
561 struct perf_pending_entry
*next
;
562 void (*func
)(struct perf_pending_entry
*);
565 struct perf_sample_data
;
567 typedef void (*perf_overflow_handler_t
)(struct perf_event
*, int,
568 struct perf_sample_data
*,
569 struct pt_regs
*regs
);
571 enum perf_group_flag
{
572 PERF_GROUP_SOFTWARE
= 0x1,
576 * struct perf_event - performance event kernel representation:
579 #ifdef CONFIG_PERF_EVENTS
580 struct list_head group_entry
;
581 struct list_head event_entry
;
582 struct list_head sibling_list
;
585 struct perf_event
*group_leader
;
586 struct perf_event
*output
;
587 const struct pmu
*pmu
;
589 enum perf_event_active_state state
;
593 * These are the total time in nanoseconds that the event
594 * has been enabled (i.e. eligible to run, and the task has
595 * been scheduled in, if this is a per-task event)
596 * and running (scheduled onto the CPU), respectively.
598 * They are computed from tstamp_enabled, tstamp_running and
599 * tstamp_stopped when the event is in INACTIVE or ACTIVE state.
601 u64 total_time_enabled
;
602 u64 total_time_running
;
605 * These are timestamps used for computing total_time_enabled
606 * and total_time_running when the event is in INACTIVE or
607 * ACTIVE state, measured in nanoseconds from an arbitrary point
609 * tstamp_enabled: the notional time when the event was enabled
610 * tstamp_running: the notional time when the event was scheduled on
611 * tstamp_stopped: in INACTIVE state, the notional time when the
612 * event was scheduled off.
618 struct perf_event_attr attr
;
619 struct hw_perf_event hw
;
621 struct perf_event_context
*ctx
;
625 * These accumulate total time (in nanoseconds) that children
626 * events have been enabled and running, respectively.
628 atomic64_t child_total_time_enabled
;
629 atomic64_t child_total_time_running
;
632 * Protect attach/detach and child_list:
634 struct mutex child_mutex
;
635 struct list_head child_list
;
636 struct perf_event
*parent
;
641 struct list_head owner_entry
;
642 struct task_struct
*owner
;
645 struct mutex mmap_mutex
;
647 struct perf_mmap_data
*data
;
650 wait_queue_head_t waitq
;
651 struct fasync_struct
*fasync
;
653 /* delayed work for NMIs and such */
657 struct perf_pending_entry pending
;
659 atomic_t event_limit
;
661 void (*destroy
)(struct perf_event
*);
662 struct rcu_head rcu_head
;
664 struct pid_namespace
*ns
;
667 perf_overflow_handler_t overflow_handler
;
669 #ifdef CONFIG_EVENT_TRACING
670 struct event_filter
*filter
;
673 #endif /* CONFIG_PERF_EVENTS */
677 * struct perf_event_context - event context structure
679 * Used as a container for task events and CPU events as well:
681 struct perf_event_context
{
683 * Protect the states of the events in the list,
684 * nr_active, and the list:
688 * Protect the list of events. Locking either mutex or lock
689 * is sufficient to ensure the list doesn't change; to change
690 * the list you need to lock both the mutex and the spinlock.
694 struct list_head pinned_groups
;
695 struct list_head flexible_groups
;
696 struct list_head event_list
;
702 struct task_struct
*task
;
705 * Context clock, runs when context enabled.
711 * These fields let us detect when two contexts have both
712 * been cloned (inherited) from a common ancestor.
714 struct perf_event_context
*parent_ctx
;
718 struct rcu_head rcu_head
;
722 * struct perf_event_cpu_context - per cpu event context structure
724 struct perf_cpu_context
{
725 struct perf_event_context ctx
;
726 struct perf_event_context
*task_ctx
;
732 * Recursion avoidance:
734 * task, softirq, irq, nmi context
739 struct perf_output_handle
{
740 struct perf_event
*event
;
741 struct perf_mmap_data
*data
;
743 unsigned long offset
;
749 #ifdef CONFIG_PERF_EVENTS
752 * Set by architecture code:
754 extern int perf_max_events
;
756 extern const struct pmu
*hw_perf_event_init(struct perf_event
*event
);
758 extern void perf_event_task_sched_in(struct task_struct
*task
);
759 extern void perf_event_task_sched_out(struct task_struct
*task
, struct task_struct
*next
);
760 extern void perf_event_task_tick(struct task_struct
*task
);
761 extern int perf_event_init_task(struct task_struct
*child
);
762 extern void perf_event_exit_task(struct task_struct
*child
);
763 extern void perf_event_free_task(struct task_struct
*task
);
764 extern void set_perf_event_pending(void);
765 extern void perf_event_do_pending(void);
766 extern void perf_event_print_debug(void);
767 extern void __perf_disable(void);
768 extern bool __perf_enable(void);
769 extern void perf_disable(void);
770 extern void perf_enable(void);
771 extern int perf_event_task_disable(void);
772 extern int perf_event_task_enable(void);
773 extern int hw_perf_group_sched_in(struct perf_event
*group_leader
,
774 struct perf_cpu_context
*cpuctx
,
775 struct perf_event_context
*ctx
);
776 extern void perf_event_update_userpage(struct perf_event
*event
);
777 extern int perf_event_release_kernel(struct perf_event
*event
);
778 extern struct perf_event
*
779 perf_event_create_kernel_counter(struct perf_event_attr
*attr
,
782 perf_overflow_handler_t callback
);
783 extern u64
perf_event_read_value(struct perf_event
*event
,
784 u64
*enabled
, u64
*running
);
786 struct perf_sample_data
{
803 struct perf_callchain_entry
*callchain
;
804 struct perf_raw_record
*raw
;
807 extern void perf_output_sample(struct perf_output_handle
*handle
,
808 struct perf_event_header
*header
,
809 struct perf_sample_data
*data
,
810 struct perf_event
*event
);
811 extern void perf_prepare_sample(struct perf_event_header
*header
,
812 struct perf_sample_data
*data
,
813 struct perf_event
*event
,
814 struct pt_regs
*regs
);
816 extern int perf_event_overflow(struct perf_event
*event
, int nmi
,
817 struct perf_sample_data
*data
,
818 struct pt_regs
*regs
);
821 * Return 1 for a software event, 0 for a hardware event
823 static inline int is_software_event(struct perf_event
*event
)
825 switch (event
->attr
.type
) {
826 case PERF_TYPE_SOFTWARE
:
827 case PERF_TYPE_TRACEPOINT
:
828 /* for now the breakpoint stuff also works as software event */
829 case PERF_TYPE_BREAKPOINT
:
835 extern atomic_t perf_swevent_enabled
[PERF_COUNT_SW_MAX
];
837 extern void __perf_sw_event(u32
, u64
, int, struct pt_regs
*, u64
);
840 perf_sw_event(u32 event_id
, u64 nr
, int nmi
, struct pt_regs
*regs
, u64 addr
)
842 if (atomic_read(&perf_swevent_enabled
[event_id
]))
843 __perf_sw_event(event_id
, nr
, nmi
, regs
, addr
);
846 extern void __perf_event_mmap(struct vm_area_struct
*vma
);
848 static inline void perf_event_mmap(struct vm_area_struct
*vma
)
850 if (vma
->vm_flags
& VM_EXEC
)
851 __perf_event_mmap(vma
);
854 extern void perf_event_comm(struct task_struct
*tsk
);
855 extern void perf_event_fork(struct task_struct
*tsk
);
857 extern struct perf_callchain_entry
*perf_callchain(struct pt_regs
*regs
);
859 extern int sysctl_perf_event_paranoid
;
860 extern int sysctl_perf_event_mlock
;
861 extern int sysctl_perf_event_sample_rate
;
863 extern void perf_event_init(void);
864 extern void perf_tp_event(int event_id
, u64 addr
, u64 count
, void *record
, int entry_size
);
865 extern void perf_bp_event(struct perf_event
*event
, void *data
);
867 #ifndef perf_misc_flags
868 #define perf_misc_flags(regs) (user_mode(regs) ? PERF_RECORD_MISC_USER : \
869 PERF_RECORD_MISC_KERNEL)
870 #define perf_instruction_pointer(regs) instruction_pointer(regs)
873 extern int perf_output_begin(struct perf_output_handle
*handle
,
874 struct perf_event
*event
, unsigned int size
,
875 int nmi
, int sample
);
876 extern void perf_output_end(struct perf_output_handle
*handle
);
877 extern void perf_output_copy(struct perf_output_handle
*handle
,
878 const void *buf
, unsigned int len
);
879 extern int perf_swevent_get_recursion_context(void);
880 extern void perf_swevent_put_recursion_context(int rctx
);
881 extern void perf_event_enable(struct perf_event
*event
);
882 extern void perf_event_disable(struct perf_event
*event
);
885 perf_event_task_sched_in(struct task_struct
*task
) { }
887 perf_event_task_sched_out(struct task_struct
*task
,
888 struct task_struct
*next
) { }
890 perf_event_task_tick(struct task_struct
*task
) { }
891 static inline int perf_event_init_task(struct task_struct
*child
) { return 0; }
892 static inline void perf_event_exit_task(struct task_struct
*child
) { }
893 static inline void perf_event_free_task(struct task_struct
*task
) { }
894 static inline void perf_event_do_pending(void) { }
895 static inline void perf_event_print_debug(void) { }
896 static inline void perf_disable(void) { }
897 static inline void perf_enable(void) { }
898 static inline int perf_event_task_disable(void) { return -EINVAL
; }
899 static inline int perf_event_task_enable(void) { return -EINVAL
; }
902 perf_sw_event(u32 event_id
, u64 nr
, int nmi
,
903 struct pt_regs
*regs
, u64 addr
) { }
905 perf_bp_event(struct perf_event
*event
, void *data
) { }
907 static inline void perf_event_mmap(struct vm_area_struct
*vma
) { }
908 static inline void perf_event_comm(struct task_struct
*tsk
) { }
909 static inline void perf_event_fork(struct task_struct
*tsk
) { }
910 static inline void perf_event_init(void) { }
911 static inline int perf_swevent_get_recursion_context(void) { return -1; }
912 static inline void perf_swevent_put_recursion_context(int rctx
) { }
913 static inline void perf_event_enable(struct perf_event
*event
) { }
914 static inline void perf_event_disable(struct perf_event
*event
) { }
917 #define perf_output_put(handle, x) \
918 perf_output_copy((handle), &(x), sizeof(x))
920 #endif /* __KERNEL__ */
921 #endif /* _LINUX_PERF_EVENT_H */