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14#ifndef _LINUX_PERF_EVENT_H
15#define _LINUX_PERF_EVENT_H
16
17#include <uapi/linux/perf_event.h>
18#include <uapi/linux/bpf_perf_event.h>
19
20
21
22
23
24#ifdef CONFIG_PERF_EVENTS
25# include <asm/perf_event.h>
26# include <asm/local64.h>
27#endif
28
29struct perf_guest_info_callbacks {
30 int (*is_in_guest)(void);
31 int (*is_user_mode)(void);
32 unsigned long (*get_guest_ip)(void);
33};
34
35#ifdef CONFIG_HAVE_HW_BREAKPOINT
36#include <asm/hw_breakpoint.h>
37#endif
38
39#include <linux/list.h>
40#include <linux/mutex.h>
41#include <linux/rculist.h>
42#include <linux/rcupdate.h>
43#include <linux/spinlock.h>
44#include <linux/hrtimer.h>
45#include <linux/fs.h>
46#include <linux/pid_namespace.h>
47#include <linux/workqueue.h>
48#include <linux/ftrace.h>
49#include <linux/cpu.h>
50#include <linux/irq_work.h>
51#include <linux/static_key.h>
52#include <linux/jump_label_ratelimit.h>
53#include <linux/atomic.h>
54#include <linux/sysfs.h>
55#include <linux/perf_regs.h>
56#include <linux/workqueue.h>
57#include <linux/cgroup.h>
58#include <asm/local.h>
59
60struct perf_callchain_entry {
61 __u64 nr;
62 __u64 ip[0];
63};
64
65struct perf_callchain_entry_ctx {
66 struct perf_callchain_entry *entry;
67 u32 max_stack;
68 u32 nr;
69 short contexts;
70 bool contexts_maxed;
71};
72
73typedef unsigned long (*perf_copy_f)(void *dst, const void *src,
74 unsigned long off, unsigned long len);
75
76struct perf_raw_frag {
77 union {
78 struct perf_raw_frag *next;
79 unsigned long pad;
80 };
81 perf_copy_f copy;
82 void *data;
83 u32 size;
84} __packed;
85
86struct perf_raw_record {
87 struct perf_raw_frag frag;
88 u32 size;
89};
90
91
92
93
94
95
96
97
98
99
100struct perf_branch_stack {
101 __u64 nr;
102 struct perf_branch_entry entries[0];
103};
104
105struct task_struct;
106
107
108
109
110struct hw_perf_event_extra {
111 u64 config;
112 unsigned int reg;
113 int alloc;
114 int idx;
115};
116
117
118
119
120struct hw_perf_event {
121#ifdef CONFIG_PERF_EVENTS
122 union {
123 struct {
124 u64 config;
125 u64 last_tag;
126 unsigned long config_base;
127 unsigned long event_base;
128 int event_base_rdpmc;
129 int idx;
130 int last_cpu;
131 int flags;
132
133 struct hw_perf_event_extra extra_reg;
134 struct hw_perf_event_extra branch_reg;
135 };
136 struct {
137 struct hrtimer hrtimer;
138 };
139 struct {
140
141 struct list_head tp_list;
142 };
143 struct {
144 u64 pwr_acc;
145 u64 ptsc;
146 };
147#ifdef CONFIG_HAVE_HW_BREAKPOINT
148 struct {
149
150
151
152
153
154 struct arch_hw_breakpoint info;
155 struct list_head bp_list;
156 };
157#endif
158 struct {
159 u8 iommu_bank;
160 u8 iommu_cntr;
161 u16 padding;
162 u64 conf;
163 u64 conf1;
164 };
165 };
166
167
168
169
170 struct task_struct *target;
171
172
173
174
175
176 void *addr_filters;
177
178
179 unsigned long addr_filters_gen;
180
181
182
183
184#define PERF_HES_STOPPED 0x01
185#define PERF_HES_UPTODATE 0x02
186#define PERF_HES_ARCH 0x04
187
188 int state;
189
190
191
192
193
194 local64_t prev_count;
195
196
197
198
199 u64 sample_period;
200
201
202
203
204 u64 last_period;
205
206
207
208
209
210
211 local64_t period_left;
212
213
214
215
216
217 u64 interrupts_seq;
218 u64 interrupts;
219
220
221
222
223
224 u64 freq_time_stamp;
225 u64 freq_count_stamp;
226#endif
227};
228
229struct perf_event;
230
231
232
233
234#define PERF_PMU_TXN_ADD 0x1
235#define PERF_PMU_TXN_READ 0x2
236
237
238
239
240#define PERF_PMU_CAP_NO_INTERRUPT 0x01
241#define PERF_PMU_CAP_NO_NMI 0x02
242#define PERF_PMU_CAP_AUX_NO_SG 0x04
243#define PERF_PMU_CAP_AUX_SW_DOUBLEBUF 0x08
244#define PERF_PMU_CAP_EXCLUSIVE 0x10
245#define PERF_PMU_CAP_ITRACE 0x20
246#define PERF_PMU_CAP_HETEROGENEOUS_CPUS 0x40
247
248
249
250
251struct pmu {
252 struct list_head entry;
253
254 struct module *module;
255 struct device *dev;
256 const struct attribute_group **attr_groups;
257 const char *name;
258 int type;
259
260
261
262
263 int capabilities;
264
265 int * __percpu pmu_disable_count;
266 struct perf_cpu_context * __percpu pmu_cpu_context;
267 atomic_t exclusive_cnt;
268 int task_ctx_nr;
269 int hrtimer_interval_ms;
270
271
272 unsigned int nr_addr_filters;
273
274
275
276
277
278 void (*pmu_enable) (struct pmu *pmu);
279 void (*pmu_disable) (struct pmu *pmu);
280
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295
296
297 int (*event_init) (struct perf_event *event);
298
299
300
301
302
303 void (*event_mapped) (struct perf_event *event, struct mm_struct *mm);
304 void (*event_unmapped) (struct perf_event *event, struct mm_struct *mm);
305
306
307
308
309
310#define PERF_EF_START 0x01
311#define PERF_EF_RELOAD 0x02
312#define PERF_EF_UPDATE 0x04
313
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329
330
331
332 int (*add) (struct perf_event *event, int flags);
333 void (*del) (struct perf_event *event, int flags);
334
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351
352
353 void (*start) (struct perf_event *event, int flags);
354 void (*stop) (struct perf_event *event, int flags);
355
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359
360
361
362 void (*read) (struct perf_event *event);
363
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373
374 void (*start_txn) (struct pmu *pmu, unsigned int txn_flags);
375
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381
382
383 int (*commit_txn) (struct pmu *pmu);
384
385
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387
388
389
390 void (*cancel_txn) (struct pmu *pmu);
391
392
393
394
395
396 int (*event_idx) (struct perf_event *event);
397
398
399
400
401 void (*sched_task) (struct perf_event_context *ctx,
402 bool sched_in);
403
404
405
406 size_t task_ctx_size;
407
408
409
410
411
412 void *(*setup_aux) (int cpu, void **pages,
413 int nr_pages, bool overwrite);
414
415
416
417
418
419 void (*free_aux) (void *aux);
420
421
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425
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427
428
429 int (*addr_filters_validate) (struct list_head *filters);
430
431
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440
441
442
443 void (*addr_filters_sync) (struct perf_event *event);
444
445
446
447
448
449 int (*filter_match) (struct perf_event *event);
450};
451
452enum perf_addr_filter_action_t {
453 PERF_ADDR_FILTER_ACTION_STOP = 0,
454 PERF_ADDR_FILTER_ACTION_START,
455 PERF_ADDR_FILTER_ACTION_FILTER,
456};
457
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466
467
468struct perf_addr_filter {
469 struct list_head entry;
470 struct inode *inode;
471 unsigned long offset;
472 unsigned long size;
473 enum perf_addr_filter_action_t action;
474};
475
476
477
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483
484
485
486struct perf_addr_filters_head {
487 struct list_head list;
488 raw_spinlock_t lock;
489 unsigned int nr_file_filters;
490};
491
492
493
494
495enum perf_event_state {
496 PERF_EVENT_STATE_DEAD = -4,
497 PERF_EVENT_STATE_EXIT = -3,
498 PERF_EVENT_STATE_ERROR = -2,
499 PERF_EVENT_STATE_OFF = -1,
500 PERF_EVENT_STATE_INACTIVE = 0,
501 PERF_EVENT_STATE_ACTIVE = 1,
502};
503
504struct file;
505struct perf_sample_data;
506
507typedef void (*perf_overflow_handler_t)(struct perf_event *,
508 struct perf_sample_data *,
509 struct pt_regs *regs);
510
511
512
513
514
515
516
517
518#define PERF_EV_CAP_SOFTWARE BIT(0)
519#define PERF_EV_CAP_READ_ACTIVE_PKG BIT(1)
520
521#define SWEVENT_HLIST_BITS 8
522#define SWEVENT_HLIST_SIZE (1 << SWEVENT_HLIST_BITS)
523
524struct swevent_hlist {
525 struct hlist_head heads[SWEVENT_HLIST_SIZE];
526 struct rcu_head rcu_head;
527};
528
529#define PERF_ATTACH_CONTEXT 0x01
530#define PERF_ATTACH_GROUP 0x02
531#define PERF_ATTACH_TASK 0x04
532#define PERF_ATTACH_TASK_DATA 0x08
533#define PERF_ATTACH_ITRACE 0x10
534
535struct perf_cgroup;
536struct ring_buffer;
537
538struct pmu_event_list {
539 raw_spinlock_t lock;
540 struct list_head list;
541};
542
543#define for_each_sibling_event(sibling, event) \
544 if ((event)->group_leader == (event)) \
545 list_for_each_entry((sibling), &(event)->sibling_list, sibling_list)
546
547
548
549
550struct perf_event {
551#ifdef CONFIG_PERF_EVENTS
552
553
554
555
556
557 struct list_head event_entry;
558
559
560
561
562
563 struct list_head sibling_list;
564 struct list_head active_list;
565
566
567
568 struct rb_node group_node;
569 u64 group_index;
570
571
572
573
574
575 struct list_head migrate_entry;
576
577 struct hlist_node hlist_entry;
578 struct list_head active_entry;
579 int nr_siblings;
580
581
582 int event_caps;
583
584 int group_caps;
585
586 struct perf_event *group_leader;
587 struct pmu *pmu;
588 void *pmu_private;
589
590 enum perf_event_state state;
591 unsigned int attach_state;
592 local64_t count;
593 atomic64_t child_count;
594
595
596
597
598
599
600
601 u64 total_time_enabled;
602 u64 total_time_running;
603 u64 tstamp;
604
605
606
607
608
609
610
611
612
613 u64 shadow_ctx_time;
614
615 struct perf_event_attr attr;
616 u16 header_size;
617 u16 id_header_size;
618 u16 read_size;
619 struct hw_perf_event hw;
620
621 struct perf_event_context *ctx;
622 atomic_long_t refcount;
623
624
625
626
627
628 atomic64_t child_total_time_enabled;
629 atomic64_t child_total_time_running;
630
631
632
633
634 struct mutex child_mutex;
635 struct list_head child_list;
636 struct perf_event *parent;
637
638 int oncpu;
639 int cpu;
640
641 struct list_head owner_entry;
642 struct task_struct *owner;
643
644
645 struct mutex mmap_mutex;
646 atomic_t mmap_count;
647
648 struct ring_buffer *rb;
649 struct list_head rb_entry;
650 unsigned long rcu_batches;
651 int rcu_pending;
652
653
654 wait_queue_head_t waitq;
655 struct fasync_struct *fasync;
656
657
658 int pending_wakeup;
659 int pending_kill;
660 int pending_disable;
661 struct irq_work pending;
662
663 atomic_t event_limit;
664
665
666 struct perf_addr_filters_head addr_filters;
667
668 unsigned long *addr_filters_offs;
669 unsigned long addr_filters_gen;
670
671 void (*destroy)(struct perf_event *);
672 struct rcu_head rcu_head;
673
674 struct pid_namespace *ns;
675 u64 id;
676
677 u64 (*clock)(void);
678 perf_overflow_handler_t overflow_handler;
679 void *overflow_handler_context;
680#ifdef CONFIG_BPF_SYSCALL
681 perf_overflow_handler_t orig_overflow_handler;
682 struct bpf_prog *prog;
683#endif
684
685#ifdef CONFIG_EVENT_TRACING
686 struct trace_event_call *tp_event;
687 struct event_filter *filter;
688#ifdef CONFIG_FUNCTION_TRACER
689 struct ftrace_ops ftrace_ops;
690#endif
691#endif
692
693#ifdef CONFIG_CGROUP_PERF
694 struct perf_cgroup *cgrp;
695#endif
696
697 struct list_head sb_list;
698#endif
699};
700
701
702struct perf_event_groups {
703 struct rb_root tree;
704 u64 index;
705};
706
707
708
709
710
711
712struct perf_event_context {
713 struct pmu *pmu;
714
715
716
717
718 raw_spinlock_t lock;
719
720
721
722
723
724 struct mutex mutex;
725
726 struct list_head active_ctx_list;
727 struct perf_event_groups pinned_groups;
728 struct perf_event_groups flexible_groups;
729 struct list_head event_list;
730
731 struct list_head pinned_active;
732 struct list_head flexible_active;
733
734 int nr_events;
735 int nr_active;
736 int is_active;
737 int nr_stat;
738 int nr_freq;
739 int rotate_disable;
740 atomic_t refcount;
741 struct task_struct *task;
742
743
744
745
746 u64 time;
747 u64 timestamp;
748
749
750
751
752
753 struct perf_event_context *parent_ctx;
754 u64 parent_gen;
755 u64 generation;
756 int pin_count;
757#ifdef CONFIG_CGROUP_PERF
758 int nr_cgroups;
759#endif
760 void *task_ctx_data;
761 struct rcu_head rcu_head;
762};
763
764
765
766
767
768#define PERF_NR_CONTEXTS 4
769
770
771
772
773struct perf_cpu_context {
774 struct perf_event_context ctx;
775 struct perf_event_context *task_ctx;
776 int active_oncpu;
777 int exclusive;
778
779 raw_spinlock_t hrtimer_lock;
780 struct hrtimer hrtimer;
781 ktime_t hrtimer_interval;
782 unsigned int hrtimer_active;
783
784#ifdef CONFIG_CGROUP_PERF
785 struct perf_cgroup *cgrp;
786 struct list_head cgrp_cpuctx_entry;
787#endif
788
789 struct list_head sched_cb_entry;
790 int sched_cb_usage;
791
792 int online;
793};
794
795struct perf_output_handle {
796 struct perf_event *event;
797 struct ring_buffer *rb;
798 unsigned long wakeup;
799 unsigned long size;
800 u64 aux_flags;
801 union {
802 void *addr;
803 unsigned long head;
804 };
805 int page;
806};
807
808struct bpf_perf_event_data_kern {
809 bpf_user_pt_regs_t *regs;
810 struct perf_sample_data *data;
811 struct perf_event *event;
812};
813
814#ifdef CONFIG_CGROUP_PERF
815
816
817
818
819
820struct perf_cgroup_info {
821 u64 time;
822 u64 timestamp;
823};
824
825struct perf_cgroup {
826 struct cgroup_subsys_state css;
827 struct perf_cgroup_info __percpu *info;
828};
829
830
831
832
833
834
835static inline struct perf_cgroup *
836perf_cgroup_from_task(struct task_struct *task, struct perf_event_context *ctx)
837{
838 return container_of(task_css_check(task, perf_event_cgrp_id,
839 ctx ? lockdep_is_held(&ctx->lock)
840 : true),
841 struct perf_cgroup, css);
842}
843#endif
844
845#ifdef CONFIG_PERF_EVENTS
846
847extern void *perf_aux_output_begin(struct perf_output_handle *handle,
848 struct perf_event *event);
849extern void perf_aux_output_end(struct perf_output_handle *handle,
850 unsigned long size);
851extern int perf_aux_output_skip(struct perf_output_handle *handle,
852 unsigned long size);
853extern void *perf_get_aux(struct perf_output_handle *handle);
854extern void perf_aux_output_flag(struct perf_output_handle *handle, u64 flags);
855extern void perf_event_itrace_started(struct perf_event *event);
856
857extern int perf_pmu_register(struct pmu *pmu, const char *name, int type);
858extern void perf_pmu_unregister(struct pmu *pmu);
859
860extern int perf_num_counters(void);
861extern const char *perf_pmu_name(void);
862extern void __perf_event_task_sched_in(struct task_struct *prev,
863 struct task_struct *task);
864extern void __perf_event_task_sched_out(struct task_struct *prev,
865 struct task_struct *next);
866extern int perf_event_init_task(struct task_struct *child);
867extern void perf_event_exit_task(struct task_struct *child);
868extern void perf_event_free_task(struct task_struct *task);
869extern void perf_event_delayed_put(struct task_struct *task);
870extern struct file *perf_event_get(unsigned int fd);
871extern const struct perf_event_attr *perf_event_attrs(struct perf_event *event);
872extern void perf_event_print_debug(void);
873extern void perf_pmu_disable(struct pmu *pmu);
874extern void perf_pmu_enable(struct pmu *pmu);
875extern void perf_sched_cb_dec(struct pmu *pmu);
876extern void perf_sched_cb_inc(struct pmu *pmu);
877extern int perf_event_task_disable(void);
878extern int perf_event_task_enable(void);
879extern int perf_event_refresh(struct perf_event *event, int refresh);
880extern void perf_event_update_userpage(struct perf_event *event);
881extern int perf_event_release_kernel(struct perf_event *event);
882extern struct perf_event *
883perf_event_create_kernel_counter(struct perf_event_attr *attr,
884 int cpu,
885 struct task_struct *task,
886 perf_overflow_handler_t callback,
887 void *context);
888extern void perf_pmu_migrate_context(struct pmu *pmu,
889 int src_cpu, int dst_cpu);
890int perf_event_read_local(struct perf_event *event, u64 *value,
891 u64 *enabled, u64 *running);
892extern u64 perf_event_read_value(struct perf_event *event,
893 u64 *enabled, u64 *running);
894
895
896struct perf_sample_data {
897
898
899
900
901 u64 addr;
902 struct perf_raw_record *raw;
903 struct perf_branch_stack *br_stack;
904 u64 period;
905 u64 weight;
906 u64 txn;
907 union perf_mem_data_src data_src;
908
909
910
911
912
913 u64 type;
914 u64 ip;
915 struct {
916 u32 pid;
917 u32 tid;
918 } tid_entry;
919 u64 time;
920 u64 id;
921 u64 stream_id;
922 struct {
923 u32 cpu;
924 u32 reserved;
925 } cpu_entry;
926 struct perf_callchain_entry *callchain;
927
928
929
930
931
932 struct perf_regs regs_user;
933 struct pt_regs regs_user_copy;
934
935 struct perf_regs regs_intr;
936 u64 stack_user_size;
937
938 u64 phys_addr;
939} ____cacheline_aligned;
940
941
942#define PERF_MEM_NA (PERF_MEM_S(OP, NA) |\
943 PERF_MEM_S(LVL, NA) |\
944 PERF_MEM_S(SNOOP, NA) |\
945 PERF_MEM_S(LOCK, NA) |\
946 PERF_MEM_S(TLB, NA))
947
948static inline void perf_sample_data_init(struct perf_sample_data *data,
949 u64 addr, u64 period)
950{
951
952 data->addr = addr;
953 data->raw = NULL;
954 data->br_stack = NULL;
955 data->period = period;
956 data->weight = 0;
957 data->data_src.val = PERF_MEM_NA;
958 data->txn = 0;
959}
960
961extern void perf_output_sample(struct perf_output_handle *handle,
962 struct perf_event_header *header,
963 struct perf_sample_data *data,
964 struct perf_event *event);
965extern void perf_prepare_sample(struct perf_event_header *header,
966 struct perf_sample_data *data,
967 struct perf_event *event,
968 struct pt_regs *regs);
969
970extern int perf_event_overflow(struct perf_event *event,
971 struct perf_sample_data *data,
972 struct pt_regs *regs);
973
974extern void perf_event_output_forward(struct perf_event *event,
975 struct perf_sample_data *data,
976 struct pt_regs *regs);
977extern void perf_event_output_backward(struct perf_event *event,
978 struct perf_sample_data *data,
979 struct pt_regs *regs);
980extern void perf_event_output(struct perf_event *event,
981 struct perf_sample_data *data,
982 struct pt_regs *regs);
983
984static inline bool
985is_default_overflow_handler(struct perf_event *event)
986{
987 if (likely(event->overflow_handler == perf_event_output_forward))
988 return true;
989 if (unlikely(event->overflow_handler == perf_event_output_backward))
990 return true;
991 return false;
992}
993
994extern void
995perf_event_header__init_id(struct perf_event_header *header,
996 struct perf_sample_data *data,
997 struct perf_event *event);
998extern void
999perf_event__output_id_sample(struct perf_event *event,
1000 struct perf_output_handle *handle,
1001 struct perf_sample_data *sample);
1002
1003extern void
1004perf_log_lost_samples(struct perf_event *event, u64 lost);
1005
1006static inline bool is_sampling_event(struct perf_event *event)
1007{
1008 return event->attr.sample_period != 0;
1009}
1010
1011
1012
1013
1014static inline int is_software_event(struct perf_event *event)
1015{
1016 return event->event_caps & PERF_EV_CAP_SOFTWARE;
1017}
1018
1019extern struct static_key perf_swevent_enabled[PERF_COUNT_SW_MAX];
1020
1021extern void ___perf_sw_event(u32, u64, struct pt_regs *, u64);
1022extern void __perf_sw_event(u32, u64, struct pt_regs *, u64);
1023
1024#ifndef perf_arch_fetch_caller_regs
1025static inline void perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip) { }
1026#endif
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036static inline void perf_fetch_caller_regs(struct pt_regs *regs)
1037{
1038 perf_arch_fetch_caller_regs(regs, CALLER_ADDR0);
1039}
1040
1041static __always_inline void
1042perf_sw_event(u32 event_id, u64 nr, struct pt_regs *regs, u64 addr)
1043{
1044 if (static_key_false(&perf_swevent_enabled[event_id]))
1045 __perf_sw_event(event_id, nr, regs, addr);
1046}
1047
1048DECLARE_PER_CPU(struct pt_regs, __perf_regs[4]);
1049
1050
1051
1052
1053
1054
1055static __always_inline void
1056perf_sw_event_sched(u32 event_id, u64 nr, u64 addr)
1057{
1058 if (static_key_false(&perf_swevent_enabled[event_id])) {
1059 struct pt_regs *regs = this_cpu_ptr(&__perf_regs[0]);
1060
1061 perf_fetch_caller_regs(regs);
1062 ___perf_sw_event(event_id, nr, regs, addr);
1063 }
1064}
1065
1066extern struct static_key_false perf_sched_events;
1067
1068static __always_inline bool
1069perf_sw_migrate_enabled(void)
1070{
1071 if (static_key_false(&perf_swevent_enabled[PERF_COUNT_SW_CPU_MIGRATIONS]))
1072 return true;
1073 return false;
1074}
1075
1076static inline void perf_event_task_migrate(struct task_struct *task)
1077{
1078 if (perf_sw_migrate_enabled())
1079 task->sched_migrated = 1;
1080}
1081
1082static inline void perf_event_task_sched_in(struct task_struct *prev,
1083 struct task_struct *task)
1084{
1085 if (static_branch_unlikely(&perf_sched_events))
1086 __perf_event_task_sched_in(prev, task);
1087
1088 if (perf_sw_migrate_enabled() && task->sched_migrated) {
1089 struct pt_regs *regs = this_cpu_ptr(&__perf_regs[0]);
1090
1091 perf_fetch_caller_regs(regs);
1092 ___perf_sw_event(PERF_COUNT_SW_CPU_MIGRATIONS, 1, regs, 0);
1093 task->sched_migrated = 0;
1094 }
1095}
1096
1097static inline void perf_event_task_sched_out(struct task_struct *prev,
1098 struct task_struct *next)
1099{
1100 perf_sw_event_sched(PERF_COUNT_SW_CONTEXT_SWITCHES, 1, 0);
1101
1102 if (static_branch_unlikely(&perf_sched_events))
1103 __perf_event_task_sched_out(prev, next);
1104}
1105
1106extern void perf_event_mmap(struct vm_area_struct *vma);
1107extern struct perf_guest_info_callbacks *perf_guest_cbs;
1108extern int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
1109extern int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
1110
1111extern void perf_event_exec(void);
1112extern void perf_event_comm(struct task_struct *tsk, bool exec);
1113extern void perf_event_namespaces(struct task_struct *tsk);
1114extern void perf_event_fork(struct task_struct *tsk);
1115
1116
1117DECLARE_PER_CPU(struct perf_callchain_entry, perf_callchain_entry);
1118
1119extern void perf_callchain_user(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs);
1120extern void perf_callchain_kernel(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs);
1121extern struct perf_callchain_entry *
1122get_perf_callchain(struct pt_regs *regs, u32 init_nr, bool kernel, bool user,
1123 u32 max_stack, bool crosstask, bool add_mark);
1124extern int get_callchain_buffers(int max_stack);
1125extern void put_callchain_buffers(void);
1126
1127extern int sysctl_perf_event_max_stack;
1128extern int sysctl_perf_event_max_contexts_per_stack;
1129
1130static inline int perf_callchain_store_context(struct perf_callchain_entry_ctx *ctx, u64 ip)
1131{
1132 if (ctx->contexts < sysctl_perf_event_max_contexts_per_stack) {
1133 struct perf_callchain_entry *entry = ctx->entry;
1134 entry->ip[entry->nr++] = ip;
1135 ++ctx->contexts;
1136 return 0;
1137 } else {
1138 ctx->contexts_maxed = true;
1139 return -1;
1140 }
1141}
1142
1143static inline int perf_callchain_store(struct perf_callchain_entry_ctx *ctx, u64 ip)
1144{
1145 if (ctx->nr < ctx->max_stack && !ctx->contexts_maxed) {
1146 struct perf_callchain_entry *entry = ctx->entry;
1147 entry->ip[entry->nr++] = ip;
1148 ++ctx->nr;
1149 return 0;
1150 } else {
1151 return -1;
1152 }
1153}
1154
1155extern int sysctl_perf_event_paranoid;
1156extern int sysctl_perf_event_mlock;
1157extern int sysctl_perf_event_sample_rate;
1158extern int sysctl_perf_cpu_time_max_percent;
1159
1160extern void perf_sample_event_took(u64 sample_len_ns);
1161
1162extern int perf_proc_update_handler(struct ctl_table *table, int write,
1163 void __user *buffer, size_t *lenp,
1164 loff_t *ppos);
1165extern int perf_cpu_time_max_percent_handler(struct ctl_table *table, int write,
1166 void __user *buffer, size_t *lenp,
1167 loff_t *ppos);
1168
1169int perf_event_max_stack_handler(struct ctl_table *table, int write,
1170 void __user *buffer, size_t *lenp, loff_t *ppos);
1171
1172static inline bool perf_paranoid_tracepoint_raw(void)
1173{
1174 return sysctl_perf_event_paranoid > -1;
1175}
1176
1177static inline bool perf_paranoid_cpu(void)
1178{
1179 return sysctl_perf_event_paranoid > 0;
1180}
1181
1182static inline bool perf_paranoid_kernel(void)
1183{
1184 return sysctl_perf_event_paranoid > 1;
1185}
1186
1187extern void perf_event_init(void);
1188extern void perf_tp_event(u16 event_type, u64 count, void *record,
1189 int entry_size, struct pt_regs *regs,
1190 struct hlist_head *head, int rctx,
1191 struct task_struct *task);
1192extern void perf_bp_event(struct perf_event *event, void *data);
1193
1194#ifndef perf_misc_flags
1195# define perf_misc_flags(regs) \
1196 (user_mode(regs) ? PERF_RECORD_MISC_USER : PERF_RECORD_MISC_KERNEL)
1197# define perf_instruction_pointer(regs) instruction_pointer(regs)
1198#endif
1199#ifndef perf_arch_bpf_user_pt_regs
1200# define perf_arch_bpf_user_pt_regs(regs) regs
1201#endif
1202
1203static inline bool has_branch_stack(struct perf_event *event)
1204{
1205 return event->attr.sample_type & PERF_SAMPLE_BRANCH_STACK;
1206}
1207
1208static inline bool needs_branch_stack(struct perf_event *event)
1209{
1210 return event->attr.branch_sample_type != 0;
1211}
1212
1213static inline bool has_aux(struct perf_event *event)
1214{
1215 return event->pmu->setup_aux;
1216}
1217
1218static inline bool is_write_backward(struct perf_event *event)
1219{
1220 return !!event->attr.write_backward;
1221}
1222
1223static inline bool has_addr_filter(struct perf_event *event)
1224{
1225 return event->pmu->nr_addr_filters;
1226}
1227
1228
1229
1230
1231static inline struct perf_addr_filters_head *
1232perf_event_addr_filters(struct perf_event *event)
1233{
1234 struct perf_addr_filters_head *ifh = &event->addr_filters;
1235
1236 if (event->parent)
1237 ifh = &event->parent->addr_filters;
1238
1239 return ifh;
1240}
1241
1242extern void perf_event_addr_filters_sync(struct perf_event *event);
1243
1244extern int perf_output_begin(struct perf_output_handle *handle,
1245 struct perf_event *event, unsigned int size);
1246extern int perf_output_begin_forward(struct perf_output_handle *handle,
1247 struct perf_event *event,
1248 unsigned int size);
1249extern int perf_output_begin_backward(struct perf_output_handle *handle,
1250 struct perf_event *event,
1251 unsigned int size);
1252
1253extern void perf_output_end(struct perf_output_handle *handle);
1254extern unsigned int perf_output_copy(struct perf_output_handle *handle,
1255 const void *buf, unsigned int len);
1256extern unsigned int perf_output_skip(struct perf_output_handle *handle,
1257 unsigned int len);
1258extern int perf_swevent_get_recursion_context(void);
1259extern void perf_swevent_put_recursion_context(int rctx);
1260extern u64 perf_swevent_set_period(struct perf_event *event);
1261extern void perf_event_enable(struct perf_event *event);
1262extern void perf_event_disable(struct perf_event *event);
1263extern void perf_event_disable_local(struct perf_event *event);
1264extern void perf_event_disable_inatomic(struct perf_event *event);
1265extern void perf_event_task_tick(void);
1266extern int perf_event_account_interrupt(struct perf_event *event);
1267#else
1268static inline void *
1269perf_aux_output_begin(struct perf_output_handle *handle,
1270 struct perf_event *event) { return NULL; }
1271static inline void
1272perf_aux_output_end(struct perf_output_handle *handle, unsigned long size)
1273 { }
1274static inline int
1275perf_aux_output_skip(struct perf_output_handle *handle,
1276 unsigned long size) { return -EINVAL; }
1277static inline void *
1278perf_get_aux(struct perf_output_handle *handle) { return NULL; }
1279static inline void
1280perf_event_task_migrate(struct task_struct *task) { }
1281static inline void
1282perf_event_task_sched_in(struct task_struct *prev,
1283 struct task_struct *task) { }
1284static inline void
1285perf_event_task_sched_out(struct task_struct *prev,
1286 struct task_struct *next) { }
1287static inline int perf_event_init_task(struct task_struct *child) { return 0; }
1288static inline void perf_event_exit_task(struct task_struct *child) { }
1289static inline void perf_event_free_task(struct task_struct *task) { }
1290static inline void perf_event_delayed_put(struct task_struct *task) { }
1291static inline struct file *perf_event_get(unsigned int fd) { return ERR_PTR(-EINVAL); }
1292static inline const struct perf_event_attr *perf_event_attrs(struct perf_event *event)
1293{
1294 return ERR_PTR(-EINVAL);
1295}
1296static inline int perf_event_read_local(struct perf_event *event, u64 *value,
1297 u64 *enabled, u64 *running)
1298{
1299 return -EINVAL;
1300}
1301static inline void perf_event_print_debug(void) { }
1302static inline int perf_event_task_disable(void) { return -EINVAL; }
1303static inline int perf_event_task_enable(void) { return -EINVAL; }
1304static inline int perf_event_refresh(struct perf_event *event, int refresh)
1305{
1306 return -EINVAL;
1307}
1308
1309static inline void
1310perf_sw_event(u32 event_id, u64 nr, struct pt_regs *regs, u64 addr) { }
1311static inline void
1312perf_sw_event_sched(u32 event_id, u64 nr, u64 addr) { }
1313static inline void
1314perf_bp_event(struct perf_event *event, void *data) { }
1315
1316static inline int perf_register_guest_info_callbacks
1317(struct perf_guest_info_callbacks *callbacks) { return 0; }
1318static inline int perf_unregister_guest_info_callbacks
1319(struct perf_guest_info_callbacks *callbacks) { return 0; }
1320
1321static inline void perf_event_mmap(struct vm_area_struct *vma) { }
1322static inline void perf_event_exec(void) { }
1323static inline void perf_event_comm(struct task_struct *tsk, bool exec) { }
1324static inline void perf_event_namespaces(struct task_struct *tsk) { }
1325static inline void perf_event_fork(struct task_struct *tsk) { }
1326static inline void perf_event_init(void) { }
1327static inline int perf_swevent_get_recursion_context(void) { return -1; }
1328static inline void perf_swevent_put_recursion_context(int rctx) { }
1329static inline u64 perf_swevent_set_period(struct perf_event *event) { return 0; }
1330static inline void perf_event_enable(struct perf_event *event) { }
1331static inline void perf_event_disable(struct perf_event *event) { }
1332static inline int __perf_event_disable(void *info) { return -1; }
1333static inline void perf_event_task_tick(void) { }
1334static inline int perf_event_release_kernel(struct perf_event *event) { return 0; }
1335#endif
1336
1337#if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_CPU_SUP_INTEL)
1338extern void perf_restore_debug_store(void);
1339#else
1340static inline void perf_restore_debug_store(void) { }
1341#endif
1342
1343static __always_inline bool perf_raw_frag_last(const struct perf_raw_frag *frag)
1344{
1345 return frag->pad < sizeof(u64);
1346}
1347
1348#define perf_output_put(handle, x) perf_output_copy((handle), &(x), sizeof(x))
1349
1350struct perf_pmu_events_attr {
1351 struct device_attribute attr;
1352 u64 id;
1353 const char *event_str;
1354};
1355
1356struct perf_pmu_events_ht_attr {
1357 struct device_attribute attr;
1358 u64 id;
1359 const char *event_str_ht;
1360 const char *event_str_noht;
1361};
1362
1363ssize_t perf_event_sysfs_show(struct device *dev, struct device_attribute *attr,
1364 char *page);
1365
1366#define PMU_EVENT_ATTR(_name, _var, _id, _show) \
1367static struct perf_pmu_events_attr _var = { \
1368 .attr = __ATTR(_name, 0444, _show, NULL), \
1369 .id = _id, \
1370};
1371
1372#define PMU_EVENT_ATTR_STRING(_name, _var, _str) \
1373static struct perf_pmu_events_attr _var = { \
1374 .attr = __ATTR(_name, 0444, perf_event_sysfs_show, NULL), \
1375 .id = 0, \
1376 .event_str = _str, \
1377};
1378
1379#define PMU_FORMAT_ATTR(_name, _format) \
1380static ssize_t \
1381_name##_show(struct device *dev, \
1382 struct device_attribute *attr, \
1383 char *page) \
1384{ \
1385 BUILD_BUG_ON(sizeof(_format) >= PAGE_SIZE); \
1386 return sprintf(page, _format "\n"); \
1387} \
1388 \
1389static struct device_attribute format_attr_##_name = __ATTR_RO(_name)
1390
1391
1392#ifdef CONFIG_PERF_EVENTS
1393int perf_event_init_cpu(unsigned int cpu);
1394int perf_event_exit_cpu(unsigned int cpu);
1395#else
1396#define perf_event_init_cpu NULL
1397#define perf_event_exit_cpu NULL
1398#endif
1399
1400#endif
1401