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 */
206 precise : 1, /* OoO invariant counter */
211 __u32 wakeup_events; /* wakeup every n events */
212 __u32 wakeup_watermark; /* bytes before wakeup */
221 * Ioctls that can be done on a perf event fd:
223 #define PERF_EVENT_IOC_ENABLE _IO ('$', 0)
224 #define PERF_EVENT_IOC_DISABLE _IO ('$', 1)
225 #define PERF_EVENT_IOC_REFRESH _IO ('$', 2)
226 #define PERF_EVENT_IOC_RESET _IO ('$', 3)
227 #define PERF_EVENT_IOC_PERIOD _IOW('$', 4, __u64)
228 #define PERF_EVENT_IOC_SET_OUTPUT _IO ('$', 5)
229 #define PERF_EVENT_IOC_SET_FILTER _IOW('$', 6, char *)
231 enum perf_event_ioc_flags {
232 PERF_IOC_FLAG_GROUP = 1U << 0,
236 * Structure of the page that can be mapped via mmap
238 struct perf_event_mmap_page {
239 __u32 version; /* version number of this structure */
240 __u32 compat_version; /* lowest version this is compat with */
243 * Bits needed to read the hw events in user-space.
253 * count = pmc_read(pc->index - 1);
254 * count += pc->offset;
259 * } while (pc->lock != seq);
261 * NOTE: for obvious reason this only works on self-monitoring
264 __u32 lock; /* seqlock for synchronization */
265 __u32 index; /* hardware event identifier */
266 __s64 offset; /* add to hardware event value */
267 __u64 time_enabled; /* time event active */
268 __u64 time_running; /* time event on cpu */
271 * Hole for extension of the self monitor capabilities
274 __u64 __reserved[123]; /* align to 1k */
277 * Control data for the mmap() data buffer.
279 * User-space reading the @data_head value should issue an rmb(), on
280 * SMP capable platforms, after reading this value -- see
281 * perf_event_wakeup().
283 * When the mapping is PROT_WRITE the @data_tail value should be
284 * written by userspace to reflect the last read data. In this case
285 * the kernel will not over-write unread data.
287 __u64 data_head; /* head in the data section */
288 __u64 data_tail; /* user-space written tail */
291 #define PERF_RECORD_MISC_CPUMODE_MASK (7 << 0)
292 #define PERF_RECORD_MISC_CPUMODE_UNKNOWN (0 << 0)
293 #define PERF_RECORD_MISC_KERNEL (1 << 0)
294 #define PERF_RECORD_MISC_USER (2 << 0)
295 #define PERF_RECORD_MISC_HYPERVISOR (3 << 0)
296 #define PERF_RECORD_MISC_GUEST_KERNEL (4 << 0)
297 #define PERF_RECORD_MISC_GUEST_USER (5 << 0)
299 #define PERF_RECORD_MISC_EXACT (1 << 14)
301 * Reserve the last bit to indicate some extended misc field
303 #define PERF_RECORD_MISC_EXT_RESERVED (1 << 15)
305 struct perf_event_header {
311 enum perf_event_type {
314 * The MMAP events record the PROT_EXEC mappings so that we can
315 * correlate userspace IPs to code. They have the following structure:
318 * struct perf_event_header header;
327 PERF_RECORD_MMAP = 1,
331 * struct perf_event_header header;
336 PERF_RECORD_LOST = 2,
340 * struct perf_event_header header;
346 PERF_RECORD_COMM = 3,
350 * struct perf_event_header header;
356 PERF_RECORD_EXIT = 4,
360 * struct perf_event_header header;
366 PERF_RECORD_THROTTLE = 5,
367 PERF_RECORD_UNTHROTTLE = 6,
371 * struct perf_event_header header;
377 PERF_RECORD_FORK = 7,
381 * struct perf_event_header header;
384 * struct read_format values;
387 PERF_RECORD_READ = 8,
391 * struct perf_event_header header;
393 * { u64 ip; } && PERF_SAMPLE_IP
394 * { u32 pid, tid; } && PERF_SAMPLE_TID
395 * { u64 time; } && PERF_SAMPLE_TIME
396 * { u64 addr; } && PERF_SAMPLE_ADDR
397 * { u64 id; } && PERF_SAMPLE_ID
398 * { u64 stream_id;} && PERF_SAMPLE_STREAM_ID
399 * { u32 cpu, res; } && PERF_SAMPLE_CPU
400 * { u64 period; } && PERF_SAMPLE_PERIOD
402 * { struct read_format values; } && PERF_SAMPLE_READ
405 * u64 ips[nr]; } && PERF_SAMPLE_CALLCHAIN
408 * # The RAW record below is opaque data wrt the ABI
410 * # That is, the ABI doesn't make any promises wrt to
411 * # the stability of its content, it may vary depending
412 * # on event, hardware, kernel version and phase of
415 * # In other words, PERF_SAMPLE_RAW contents are not an ABI.
419 * char data[size];}&& PERF_SAMPLE_RAW
422 PERF_RECORD_SAMPLE = 9,
424 PERF_RECORD_MAX, /* non-ABI */
427 enum perf_callchain_context {
428 PERF_CONTEXT_HV = (__u64)-32,
429 PERF_CONTEXT_KERNEL = (__u64)-128,
430 PERF_CONTEXT_USER = (__u64)-512,
432 PERF_CONTEXT_GUEST = (__u64)-2048,
433 PERF_CONTEXT_GUEST_KERNEL = (__u64)-2176,
434 PERF_CONTEXT_GUEST_USER = (__u64)-2560,
436 PERF_CONTEXT_MAX = (__u64)-4095,
439 #define PERF_FLAG_FD_NO_GROUP (1U << 0)
440 #define PERF_FLAG_FD_OUTPUT (1U << 1)
444 * Kernel-internal data types and definitions:
447 #ifdef CONFIG_PERF_EVENTS
448 # include <asm/perf_event.h>
451 struct perf_guest_info_callbacks {
452 int (*is_in_guest) (void);
453 int (*is_user_mode) (void);
454 unsigned long (*get_guest_ip) (void);
457 #ifdef CONFIG_HAVE_HW_BREAKPOINT
458 #include <asm/hw_breakpoint.h>
461 #include <linux/list.h>
462 #include <linux/mutex.h>
463 #include <linux/rculist.h>
464 #include <linux/rcupdate.h>
465 #include <linux/spinlock.h>
466 #include <linux/hrtimer.h>
467 #include <linux/fs.h>
468 #include <linux/pid_namespace.h>
469 #include <linux/workqueue.h>
470 #include <linux/ftrace.h>
471 #include <linux/cpu.h>
472 #include <asm/atomic.h>
474 #define PERF_MAX_STACK_DEPTH 255
476 struct perf_callchain_entry {
478 __u64 ip[PERF_MAX_STACK_DEPTH];
481 struct perf_raw_record {
486 struct perf_branch_entry {
492 struct perf_branch_stack {
494 struct perf_branch_entry entries[0];
500 * struct hw_perf_event - performance event hardware details:
502 struct hw_perf_event {
503 #ifdef CONFIG_PERF_EVENTS
505 struct { /* hardware */
508 unsigned long config_base;
509 unsigned long event_base;
513 struct { /* software */
515 struct hrtimer hrtimer;
517 #ifdef CONFIG_HAVE_HW_BREAKPOINT
519 struct arch_hw_breakpoint info;
522 atomic64_t prev_count;
525 atomic64_t period_left;
529 u64 freq_count_stamp;
536 * struct pmu - generic performance monitoring unit
539 int (*enable) (struct perf_event *event);
540 void (*disable) (struct perf_event *event);
541 int (*start) (struct perf_event *event);
542 void (*stop) (struct perf_event *event);
543 void (*read) (struct perf_event *event);
544 void (*unthrottle) (struct perf_event *event);
548 * enum perf_event_active_state - the states of a event
550 enum perf_event_active_state {
551 PERF_EVENT_STATE_FREE = -3,
552 PERF_EVENT_STATE_ERROR = -2,
553 PERF_EVENT_STATE_OFF = -1,
554 PERF_EVENT_STATE_INACTIVE = 0,
555 PERF_EVENT_STATE_ACTIVE = 1,
560 struct perf_mmap_data {
561 struct rcu_head rcu_head;
562 #ifdef CONFIG_PERF_USE_VMALLOC
563 struct work_struct work;
566 int nr_pages; /* nr of data pages */
567 int writable; /* are we writable */
568 int nr_locked; /* nr pages mlocked */
570 atomic_t poll; /* POLL_ for wakeups */
571 atomic_t events; /* event_id limit */
573 atomic_long_t head; /* write position */
574 atomic_long_t done_head; /* completed head */
576 atomic_t lock; /* concurrent writes */
577 atomic_t wakeup; /* needs a wakeup */
578 atomic_t lost; /* nr records lost */
580 long watermark; /* wakeup watermark */
582 struct perf_event_mmap_page *user_page;
586 struct perf_pending_entry {
587 struct perf_pending_entry *next;
588 void (*func)(struct perf_pending_entry *);
591 struct perf_sample_data;
593 typedef void (*perf_overflow_handler_t)(struct perf_event *, int,
594 struct perf_sample_data *,
595 struct pt_regs *regs);
597 enum perf_group_flag {
598 PERF_GROUP_SOFTWARE = 0x1,
601 #define SWEVENT_HLIST_BITS 8
602 #define SWEVENT_HLIST_SIZE (1 << SWEVENT_HLIST_BITS)
604 struct swevent_hlist {
605 struct hlist_head heads[SWEVENT_HLIST_SIZE];
606 struct rcu_head rcu_head;
610 * struct perf_event - performance event kernel representation:
613 #ifdef CONFIG_PERF_EVENTS
614 struct list_head group_entry;
615 struct list_head event_entry;
616 struct list_head sibling_list;
617 struct hlist_node hlist_entry;
620 struct perf_event *group_leader;
621 struct perf_event *output;
622 const struct pmu *pmu;
624 enum perf_event_active_state state;
628 * These are the total time in nanoseconds that the event
629 * has been enabled (i.e. eligible to run, and the task has
630 * been scheduled in, if this is a per-task event)
631 * and running (scheduled onto the CPU), respectively.
633 * They are computed from tstamp_enabled, tstamp_running and
634 * tstamp_stopped when the event is in INACTIVE or ACTIVE state.
636 u64 total_time_enabled;
637 u64 total_time_running;
640 * These are timestamps used for computing total_time_enabled
641 * and total_time_running when the event is in INACTIVE or
642 * ACTIVE state, measured in nanoseconds from an arbitrary point
644 * tstamp_enabled: the notional time when the event was enabled
645 * tstamp_running: the notional time when the event was scheduled on
646 * tstamp_stopped: in INACTIVE state, the notional time when the
647 * event was scheduled off.
653 struct perf_event_attr attr;
654 struct hw_perf_event hw;
656 struct perf_event_context *ctx;
660 * These accumulate total time (in nanoseconds) that children
661 * events have been enabled and running, respectively.
663 atomic64_t child_total_time_enabled;
664 atomic64_t child_total_time_running;
667 * Protect attach/detach and child_list:
669 struct mutex child_mutex;
670 struct list_head child_list;
671 struct perf_event *parent;
676 struct list_head owner_entry;
677 struct task_struct *owner;
680 struct mutex mmap_mutex;
682 struct perf_mmap_data *data;
685 wait_queue_head_t waitq;
686 struct fasync_struct *fasync;
688 /* delayed work for NMIs and such */
692 struct perf_pending_entry pending;
694 atomic_t event_limit;
696 void (*destroy)(struct perf_event *);
697 struct rcu_head rcu_head;
699 struct pid_namespace *ns;
702 perf_overflow_handler_t overflow_handler;
704 #ifdef CONFIG_EVENT_TRACING
705 struct event_filter *filter;
708 #endif /* CONFIG_PERF_EVENTS */
712 * struct perf_event_context - event context structure
714 * Used as a container for task events and CPU events as well:
716 struct perf_event_context {
718 * Protect the states of the events in the list,
719 * nr_active, and the list:
723 * Protect the list of events. Locking either mutex or lock
724 * is sufficient to ensure the list doesn't change; to change
725 * the list you need to lock both the mutex and the spinlock.
729 struct list_head pinned_groups;
730 struct list_head flexible_groups;
731 struct list_head event_list;
737 struct task_struct *task;
740 * Context clock, runs when context enabled.
746 * These fields let us detect when two contexts have both
747 * been cloned (inherited) from a common ancestor.
749 struct perf_event_context *parent_ctx;
753 struct rcu_head rcu_head;
757 * struct perf_event_cpu_context - per cpu event context structure
759 struct perf_cpu_context {
760 struct perf_event_context ctx;
761 struct perf_event_context *task_ctx;
765 struct swevent_hlist *swevent_hlist;
766 struct mutex hlist_mutex;
770 * Recursion avoidance:
772 * task, softirq, irq, nmi context
777 struct perf_output_handle {
778 struct perf_event *event;
779 struct perf_mmap_data *data;
781 unsigned long offset;
787 #ifdef CONFIG_PERF_EVENTS
790 * Set by architecture code:
792 extern int perf_max_events;
794 extern const struct pmu *hw_perf_event_init(struct perf_event *event);
796 extern void perf_event_task_sched_in(struct task_struct *task);
797 extern void perf_event_task_sched_out(struct task_struct *task, struct task_struct *next);
798 extern void perf_event_task_tick(struct task_struct *task);
799 extern int perf_event_init_task(struct task_struct *child);
800 extern void perf_event_exit_task(struct task_struct *child);
801 extern void perf_event_free_task(struct task_struct *task);
802 extern void set_perf_event_pending(void);
803 extern void perf_event_do_pending(void);
804 extern void perf_event_print_debug(void);
805 extern void __perf_disable(void);
806 extern bool __perf_enable(void);
807 extern void perf_disable(void);
808 extern void perf_enable(void);
809 extern int perf_event_task_disable(void);
810 extern int perf_event_task_enable(void);
811 extern int hw_perf_group_sched_in(struct perf_event *group_leader,
812 struct perf_cpu_context *cpuctx,
813 struct perf_event_context *ctx);
814 extern void perf_event_update_userpage(struct perf_event *event);
815 extern int perf_event_release_kernel(struct perf_event *event);
816 extern struct perf_event *
817 perf_event_create_kernel_counter(struct perf_event_attr *attr,
820 perf_overflow_handler_t callback);
821 extern u64 perf_event_read_value(struct perf_event *event,
822 u64 *enabled, u64 *running);
824 struct perf_sample_data {
841 struct perf_callchain_entry *callchain;
842 struct perf_raw_record *raw;
846 void perf_sample_data_init(struct perf_sample_data *data, u64 addr)
852 extern void perf_output_sample(struct perf_output_handle *handle,
853 struct perf_event_header *header,
854 struct perf_sample_data *data,
855 struct perf_event *event);
856 extern void perf_prepare_sample(struct perf_event_header *header,
857 struct perf_sample_data *data,
858 struct perf_event *event,
859 struct pt_regs *regs);
861 extern int perf_event_overflow(struct perf_event *event, int nmi,
862 struct perf_sample_data *data,
863 struct pt_regs *regs);
866 * Return 1 for a software event, 0 for a hardware event
868 static inline int is_software_event(struct perf_event *event)
870 switch (event->attr.type) {
871 case PERF_TYPE_SOFTWARE:
872 case PERF_TYPE_TRACEPOINT:
873 /* for now the breakpoint stuff also works as software event */
874 case PERF_TYPE_BREAKPOINT:
880 extern atomic_t perf_swevent_enabled[PERF_COUNT_SW_MAX];
882 extern void __perf_sw_event(u32, u64, int, struct pt_regs *, u64);
885 perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip, int skip);
888 * Take a snapshot of the regs. Skip ip and frame pointer to
889 * the nth caller. We only need a few of the regs:
890 * - ip for PERF_SAMPLE_IP
891 * - cs for user_mode() tests
892 * - bp for callchains
893 * - eflags, for future purposes, just in case
895 static inline void perf_fetch_caller_regs(struct pt_regs *regs, int skip)
899 memset(regs, 0, sizeof(*regs));
914 /* No need to support further for now */
919 return perf_arch_fetch_caller_regs(regs, ip, skip);
923 perf_sw_event(u32 event_id, u64 nr, int nmi, struct pt_regs *regs, u64 addr)
925 if (atomic_read(&perf_swevent_enabled[event_id])) {
926 struct pt_regs hot_regs;
929 perf_fetch_caller_regs(&hot_regs, 1);
932 __perf_sw_event(event_id, nr, nmi, regs, addr);
936 extern void __perf_event_mmap(struct vm_area_struct *vma);
938 static inline void perf_event_mmap(struct vm_area_struct *vma)
940 if (vma->vm_flags & VM_EXEC)
941 __perf_event_mmap(vma);
944 extern struct perf_guest_info_callbacks *perf_guest_cbs;
945 extern int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
946 extern int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
948 extern void perf_event_comm(struct task_struct *tsk);
949 extern void perf_event_fork(struct task_struct *tsk);
951 extern struct perf_callchain_entry *perf_callchain(struct pt_regs *regs);
953 extern int sysctl_perf_event_paranoid;
954 extern int sysctl_perf_event_mlock;
955 extern int sysctl_perf_event_sample_rate;
957 static inline bool perf_paranoid_tracepoint_raw(void)
959 return sysctl_perf_event_paranoid > -1;
962 static inline bool perf_paranoid_cpu(void)
964 return sysctl_perf_event_paranoid > 0;
967 static inline bool perf_paranoid_kernel(void)
969 return sysctl_perf_event_paranoid > 1;
972 extern void perf_event_init(void);
973 extern void perf_tp_event(int event_id, u64 addr, u64 count, void *record,
974 int entry_size, struct pt_regs *regs);
975 extern void perf_bp_event(struct perf_event *event, void *data);
977 #ifndef perf_misc_flags
978 #define perf_misc_flags(regs) (user_mode(regs) ? PERF_RECORD_MISC_USER : \
979 PERF_RECORD_MISC_KERNEL)
980 #define perf_instruction_pointer(regs) instruction_pointer(regs)
983 extern int perf_output_begin(struct perf_output_handle *handle,
984 struct perf_event *event, unsigned int size,
985 int nmi, int sample);
986 extern void perf_output_end(struct perf_output_handle *handle);
987 extern void perf_output_copy(struct perf_output_handle *handle,
988 const void *buf, unsigned int len);
989 extern int perf_swevent_get_recursion_context(void);
990 extern void perf_swevent_put_recursion_context(int rctx);
991 extern void perf_event_enable(struct perf_event *event);
992 extern void perf_event_disable(struct perf_event *event);
995 perf_event_task_sched_in(struct task_struct *task) { }
997 perf_event_task_sched_out(struct task_struct *task,
998 struct task_struct *next) { }
1000 perf_event_task_tick(struct task_struct *task) { }
1001 static inline int perf_event_init_task(struct task_struct *child) { return 0; }
1002 static inline void perf_event_exit_task(struct task_struct *child) { }
1003 static inline void perf_event_free_task(struct task_struct *task) { }
1004 static inline void perf_event_do_pending(void) { }
1005 static inline void perf_event_print_debug(void) { }
1006 static inline void perf_disable(void) { }
1007 static inline void perf_enable(void) { }
1008 static inline int perf_event_task_disable(void) { return -EINVAL; }
1009 static inline int perf_event_task_enable(void) { return -EINVAL; }
1012 perf_sw_event(u32 event_id, u64 nr, int nmi,
1013 struct pt_regs *regs, u64 addr) { }
1015 perf_bp_event(struct perf_event *event, void *data) { }
1017 static inline int perf_register_guest_info_callbacks
1018 (struct perf_guest_info_callbacks *callbacks) { return 0; }
1019 static inline int perf_unregister_guest_info_callbacks
1020 (struct perf_guest_info_callbacks *callbacks) { return 0; }
1022 static inline void perf_event_mmap(struct vm_area_struct *vma) { }
1023 static inline void perf_event_comm(struct task_struct *tsk) { }
1024 static inline void perf_event_fork(struct task_struct *tsk) { }
1025 static inline void perf_event_init(void) { }
1026 static inline int perf_swevent_get_recursion_context(void) { return -1; }
1027 static inline void perf_swevent_put_recursion_context(int rctx) { }
1028 static inline void perf_event_enable(struct perf_event *event) { }
1029 static inline void perf_event_disable(struct perf_event *event) { }
1032 #define perf_output_put(handle, x) \
1033 perf_output_copy((handle), &(x), sizeof(x))
1036 * This has to have a higher priority than migration_notifier in sched.c.
1038 #define perf_cpu_notifier(fn) \
1040 static struct notifier_block fn##_nb __cpuinitdata = \
1041 { .notifier_call = fn, .priority = 20 }; \
1042 fn(&fn##_nb, (unsigned long)CPU_UP_PREPARE, \
1043 (void *)(unsigned long)smp_processor_id()); \
1044 fn(&fn##_nb, (unsigned long)CPU_STARTING, \
1045 (void *)(unsigned long)smp_processor_id()); \
1046 fn(&fn##_nb, (unsigned long)CPU_ONLINE, \
1047 (void *)(unsigned long)smp_processor_id()); \
1048 register_cpu_notifier(&fn##_nb); \
1051 #endif /* __KERNEL__ */
1052 #endif /* _LINUX_PERF_EVENT_H */