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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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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
356
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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 path path;
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
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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 *perf_get_event(struct file *file);
872extern const struct perf_event_attr *perf_event_attrs(struct perf_event *event);
873extern void perf_event_print_debug(void);
874extern void perf_pmu_disable(struct pmu *pmu);
875extern void perf_pmu_enable(struct pmu *pmu);
876extern void perf_sched_cb_dec(struct pmu *pmu);
877extern void perf_sched_cb_inc(struct pmu *pmu);
878extern int perf_event_task_disable(void);
879extern int perf_event_task_enable(void);
880extern int perf_event_refresh(struct perf_event *event, int refresh);
881extern void perf_event_update_userpage(struct perf_event *event);
882extern int perf_event_release_kernel(struct perf_event *event);
883extern struct perf_event *
884perf_event_create_kernel_counter(struct perf_event_attr *attr,
885 int cpu,
886 struct task_struct *task,
887 perf_overflow_handler_t callback,
888 void *context);
889extern void perf_pmu_migrate_context(struct pmu *pmu,
890 int src_cpu, int dst_cpu);
891int perf_event_read_local(struct perf_event *event, u64 *value,
892 u64 *enabled, u64 *running);
893extern u64 perf_event_read_value(struct perf_event *event,
894 u64 *enabled, u64 *running);
895
896
897struct perf_sample_data {
898
899
900
901
902 u64 addr;
903 struct perf_raw_record *raw;
904 struct perf_branch_stack *br_stack;
905 u64 period;
906 u64 weight;
907 u64 txn;
908 union perf_mem_data_src data_src;
909
910
911
912
913
914 u64 type;
915 u64 ip;
916 struct {
917 u32 pid;
918 u32 tid;
919 } tid_entry;
920 u64 time;
921 u64 id;
922 u64 stream_id;
923 struct {
924 u32 cpu;
925 u32 reserved;
926 } cpu_entry;
927 struct perf_callchain_entry *callchain;
928
929
930
931
932
933 struct perf_regs regs_user;
934 struct pt_regs regs_user_copy;
935
936 struct perf_regs regs_intr;
937 u64 stack_user_size;
938
939 u64 phys_addr;
940} ____cacheline_aligned;
941
942
943#define PERF_MEM_NA (PERF_MEM_S(OP, NA) |\
944 PERF_MEM_S(LVL, NA) |\
945 PERF_MEM_S(SNOOP, NA) |\
946 PERF_MEM_S(LOCK, NA) |\
947 PERF_MEM_S(TLB, NA))
948
949static inline void perf_sample_data_init(struct perf_sample_data *data,
950 u64 addr, u64 period)
951{
952
953 data->addr = addr;
954 data->raw = NULL;
955 data->br_stack = NULL;
956 data->period = period;
957 data->weight = 0;
958 data->data_src.val = PERF_MEM_NA;
959 data->txn = 0;
960}
961
962extern void perf_output_sample(struct perf_output_handle *handle,
963 struct perf_event_header *header,
964 struct perf_sample_data *data,
965 struct perf_event *event);
966extern void perf_prepare_sample(struct perf_event_header *header,
967 struct perf_sample_data *data,
968 struct perf_event *event,
969 struct pt_regs *regs);
970
971extern int perf_event_overflow(struct perf_event *event,
972 struct perf_sample_data *data,
973 struct pt_regs *regs);
974
975extern void perf_event_output_forward(struct perf_event *event,
976 struct perf_sample_data *data,
977 struct pt_regs *regs);
978extern void perf_event_output_backward(struct perf_event *event,
979 struct perf_sample_data *data,
980 struct pt_regs *regs);
981extern void perf_event_output(struct perf_event *event,
982 struct perf_sample_data *data,
983 struct pt_regs *regs);
984
985static inline bool
986is_default_overflow_handler(struct perf_event *event)
987{
988 if (likely(event->overflow_handler == perf_event_output_forward))
989 return true;
990 if (unlikely(event->overflow_handler == perf_event_output_backward))
991 return true;
992 return false;
993}
994
995extern void
996perf_event_header__init_id(struct perf_event_header *header,
997 struct perf_sample_data *data,
998 struct perf_event *event);
999extern void
1000perf_event__output_id_sample(struct perf_event *event,
1001 struct perf_output_handle *handle,
1002 struct perf_sample_data *sample);
1003
1004extern void
1005perf_log_lost_samples(struct perf_event *event, u64 lost);
1006
1007static inline bool is_sampling_event(struct perf_event *event)
1008{
1009 return event->attr.sample_period != 0;
1010}
1011
1012
1013
1014
1015static inline int is_software_event(struct perf_event *event)
1016{
1017 return event->event_caps & PERF_EV_CAP_SOFTWARE;
1018}
1019
1020
1021
1022
1023static inline int in_software_context(struct perf_event *event)
1024{
1025 return event->ctx->pmu->task_ctx_nr == perf_sw_context;
1026}
1027
1028extern struct static_key perf_swevent_enabled[PERF_COUNT_SW_MAX];
1029
1030extern void ___perf_sw_event(u32, u64, struct pt_regs *, u64);
1031extern void __perf_sw_event(u32, u64, struct pt_regs *, u64);
1032
1033#ifndef perf_arch_fetch_caller_regs
1034static inline void perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip) { }
1035#endif
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045static inline void perf_fetch_caller_regs(struct pt_regs *regs)
1046{
1047 perf_arch_fetch_caller_regs(regs, CALLER_ADDR0);
1048}
1049
1050static __always_inline void
1051perf_sw_event(u32 event_id, u64 nr, struct pt_regs *regs, u64 addr)
1052{
1053 if (static_key_false(&perf_swevent_enabled[event_id]))
1054 __perf_sw_event(event_id, nr, regs, addr);
1055}
1056
1057DECLARE_PER_CPU(struct pt_regs, __perf_regs[4]);
1058
1059
1060
1061
1062
1063
1064static __always_inline void
1065perf_sw_event_sched(u32 event_id, u64 nr, u64 addr)
1066{
1067 if (static_key_false(&perf_swevent_enabled[event_id])) {
1068 struct pt_regs *regs = this_cpu_ptr(&__perf_regs[0]);
1069
1070 perf_fetch_caller_regs(regs);
1071 ___perf_sw_event(event_id, nr, regs, addr);
1072 }
1073}
1074
1075extern struct static_key_false perf_sched_events;
1076
1077static __always_inline bool
1078perf_sw_migrate_enabled(void)
1079{
1080 if (static_key_false(&perf_swevent_enabled[PERF_COUNT_SW_CPU_MIGRATIONS]))
1081 return true;
1082 return false;
1083}
1084
1085static inline void perf_event_task_migrate(struct task_struct *task)
1086{
1087 if (perf_sw_migrate_enabled())
1088 task->sched_migrated = 1;
1089}
1090
1091static inline void perf_event_task_sched_in(struct task_struct *prev,
1092 struct task_struct *task)
1093{
1094 if (static_branch_unlikely(&perf_sched_events))
1095 __perf_event_task_sched_in(prev, task);
1096
1097 if (perf_sw_migrate_enabled() && task->sched_migrated) {
1098 struct pt_regs *regs = this_cpu_ptr(&__perf_regs[0]);
1099
1100 perf_fetch_caller_regs(regs);
1101 ___perf_sw_event(PERF_COUNT_SW_CPU_MIGRATIONS, 1, regs, 0);
1102 task->sched_migrated = 0;
1103 }
1104}
1105
1106static inline void perf_event_task_sched_out(struct task_struct *prev,
1107 struct task_struct *next)
1108{
1109 perf_sw_event_sched(PERF_COUNT_SW_CONTEXT_SWITCHES, 1, 0);
1110
1111 if (static_branch_unlikely(&perf_sched_events))
1112 __perf_event_task_sched_out(prev, next);
1113}
1114
1115extern void perf_event_mmap(struct vm_area_struct *vma);
1116extern struct perf_guest_info_callbacks *perf_guest_cbs;
1117extern int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
1118extern int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
1119
1120extern void perf_event_exec(void);
1121extern void perf_event_comm(struct task_struct *tsk, bool exec);
1122extern void perf_event_namespaces(struct task_struct *tsk);
1123extern void perf_event_fork(struct task_struct *tsk);
1124
1125
1126DECLARE_PER_CPU(struct perf_callchain_entry, perf_callchain_entry);
1127
1128extern void perf_callchain_user(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs);
1129extern void perf_callchain_kernel(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs);
1130extern struct perf_callchain_entry *
1131get_perf_callchain(struct pt_regs *regs, u32 init_nr, bool kernel, bool user,
1132 u32 max_stack, bool crosstask, bool add_mark);
1133extern struct perf_callchain_entry *perf_callchain(struct perf_event *event, struct pt_regs *regs);
1134extern int get_callchain_buffers(int max_stack);
1135extern void put_callchain_buffers(void);
1136
1137extern int sysctl_perf_event_max_stack;
1138extern int sysctl_perf_event_max_contexts_per_stack;
1139
1140static inline int perf_callchain_store_context(struct perf_callchain_entry_ctx *ctx, u64 ip)
1141{
1142 if (ctx->contexts < sysctl_perf_event_max_contexts_per_stack) {
1143 struct perf_callchain_entry *entry = ctx->entry;
1144 entry->ip[entry->nr++] = ip;
1145 ++ctx->contexts;
1146 return 0;
1147 } else {
1148 ctx->contexts_maxed = true;
1149 return -1;
1150 }
1151}
1152
1153static inline int perf_callchain_store(struct perf_callchain_entry_ctx *ctx, u64 ip)
1154{
1155 if (ctx->nr < ctx->max_stack && !ctx->contexts_maxed) {
1156 struct perf_callchain_entry *entry = ctx->entry;
1157 entry->ip[entry->nr++] = ip;
1158 ++ctx->nr;
1159 return 0;
1160 } else {
1161 return -1;
1162 }
1163}
1164
1165extern int sysctl_perf_event_paranoid;
1166extern int sysctl_perf_event_mlock;
1167extern int sysctl_perf_event_sample_rate;
1168extern int sysctl_perf_cpu_time_max_percent;
1169
1170extern void perf_sample_event_took(u64 sample_len_ns);
1171
1172extern int perf_proc_update_handler(struct ctl_table *table, int write,
1173 void __user *buffer, size_t *lenp,
1174 loff_t *ppos);
1175extern int perf_cpu_time_max_percent_handler(struct ctl_table *table, int write,
1176 void __user *buffer, size_t *lenp,
1177 loff_t *ppos);
1178
1179int perf_event_max_stack_handler(struct ctl_table *table, int write,
1180 void __user *buffer, size_t *lenp, loff_t *ppos);
1181
1182static inline bool perf_paranoid_tracepoint_raw(void)
1183{
1184 return sysctl_perf_event_paranoid > -1;
1185}
1186
1187static inline bool perf_paranoid_cpu(void)
1188{
1189 return sysctl_perf_event_paranoid > 0;
1190}
1191
1192static inline bool perf_paranoid_kernel(void)
1193{
1194 return sysctl_perf_event_paranoid > 1;
1195}
1196
1197extern void perf_event_init(void);
1198extern void perf_tp_event(u16 event_type, u64 count, void *record,
1199 int entry_size, struct pt_regs *regs,
1200 struct hlist_head *head, int rctx,
1201 struct task_struct *task);
1202extern void perf_bp_event(struct perf_event *event, void *data);
1203
1204#ifndef perf_misc_flags
1205# define perf_misc_flags(regs) \
1206 (user_mode(regs) ? PERF_RECORD_MISC_USER : PERF_RECORD_MISC_KERNEL)
1207# define perf_instruction_pointer(regs) instruction_pointer(regs)
1208#endif
1209#ifndef perf_arch_bpf_user_pt_regs
1210# define perf_arch_bpf_user_pt_regs(regs) regs
1211#endif
1212
1213static inline bool has_branch_stack(struct perf_event *event)
1214{
1215 return event->attr.sample_type & PERF_SAMPLE_BRANCH_STACK;
1216}
1217
1218static inline bool needs_branch_stack(struct perf_event *event)
1219{
1220 return event->attr.branch_sample_type != 0;
1221}
1222
1223static inline bool has_aux(struct perf_event *event)
1224{
1225 return event->pmu->setup_aux;
1226}
1227
1228static inline bool is_write_backward(struct perf_event *event)
1229{
1230 return !!event->attr.write_backward;
1231}
1232
1233static inline bool has_addr_filter(struct perf_event *event)
1234{
1235 return event->pmu->nr_addr_filters;
1236}
1237
1238
1239
1240
1241static inline struct perf_addr_filters_head *
1242perf_event_addr_filters(struct perf_event *event)
1243{
1244 struct perf_addr_filters_head *ifh = &event->addr_filters;
1245
1246 if (event->parent)
1247 ifh = &event->parent->addr_filters;
1248
1249 return ifh;
1250}
1251
1252extern void perf_event_addr_filters_sync(struct perf_event *event);
1253
1254extern int perf_output_begin(struct perf_output_handle *handle,
1255 struct perf_event *event, unsigned int size);
1256extern int perf_output_begin_forward(struct perf_output_handle *handle,
1257 struct perf_event *event,
1258 unsigned int size);
1259extern int perf_output_begin_backward(struct perf_output_handle *handle,
1260 struct perf_event *event,
1261 unsigned int size);
1262
1263extern void perf_output_end(struct perf_output_handle *handle);
1264extern unsigned int perf_output_copy(struct perf_output_handle *handle,
1265 const void *buf, unsigned int len);
1266extern unsigned int perf_output_skip(struct perf_output_handle *handle,
1267 unsigned int len);
1268extern int perf_swevent_get_recursion_context(void);
1269extern void perf_swevent_put_recursion_context(int rctx);
1270extern u64 perf_swevent_set_period(struct perf_event *event);
1271extern void perf_event_enable(struct perf_event *event);
1272extern void perf_event_disable(struct perf_event *event);
1273extern void perf_event_disable_local(struct perf_event *event);
1274extern void perf_event_disable_inatomic(struct perf_event *event);
1275extern void perf_event_task_tick(void);
1276extern int perf_event_account_interrupt(struct perf_event *event);
1277#else
1278static inline void *
1279perf_aux_output_begin(struct perf_output_handle *handle,
1280 struct perf_event *event) { return NULL; }
1281static inline void
1282perf_aux_output_end(struct perf_output_handle *handle, unsigned long size)
1283 { }
1284static inline int
1285perf_aux_output_skip(struct perf_output_handle *handle,
1286 unsigned long size) { return -EINVAL; }
1287static inline void *
1288perf_get_aux(struct perf_output_handle *handle) { return NULL; }
1289static inline void
1290perf_event_task_migrate(struct task_struct *task) { }
1291static inline void
1292perf_event_task_sched_in(struct task_struct *prev,
1293 struct task_struct *task) { }
1294static inline void
1295perf_event_task_sched_out(struct task_struct *prev,
1296 struct task_struct *next) { }
1297static inline int perf_event_init_task(struct task_struct *child) { return 0; }
1298static inline void perf_event_exit_task(struct task_struct *child) { }
1299static inline void perf_event_free_task(struct task_struct *task) { }
1300static inline void perf_event_delayed_put(struct task_struct *task) { }
1301static inline struct file *perf_event_get(unsigned int fd) { return ERR_PTR(-EINVAL); }
1302static inline const struct perf_event *perf_get_event(struct file *file)
1303{
1304 return ERR_PTR(-EINVAL);
1305}
1306static inline const struct perf_event_attr *perf_event_attrs(struct perf_event *event)
1307{
1308 return ERR_PTR(-EINVAL);
1309}
1310static inline int perf_event_read_local(struct perf_event *event, u64 *value,
1311 u64 *enabled, u64 *running)
1312{
1313 return -EINVAL;
1314}
1315static inline void perf_event_print_debug(void) { }
1316static inline int perf_event_task_disable(void) { return -EINVAL; }
1317static inline int perf_event_task_enable(void) { return -EINVAL; }
1318static inline int perf_event_refresh(struct perf_event *event, int refresh)
1319{
1320 return -EINVAL;
1321}
1322
1323static inline void
1324perf_sw_event(u32 event_id, u64 nr, struct pt_regs *regs, u64 addr) { }
1325static inline void
1326perf_sw_event_sched(u32 event_id, u64 nr, u64 addr) { }
1327static inline void
1328perf_bp_event(struct perf_event *event, void *data) { }
1329
1330static inline int perf_register_guest_info_callbacks
1331(struct perf_guest_info_callbacks *callbacks) { return 0; }
1332static inline int perf_unregister_guest_info_callbacks
1333(struct perf_guest_info_callbacks *callbacks) { return 0; }
1334
1335static inline void perf_event_mmap(struct vm_area_struct *vma) { }
1336static inline void perf_event_exec(void) { }
1337static inline void perf_event_comm(struct task_struct *tsk, bool exec) { }
1338static inline void perf_event_namespaces(struct task_struct *tsk) { }
1339static inline void perf_event_fork(struct task_struct *tsk) { }
1340static inline void perf_event_init(void) { }
1341static inline int perf_swevent_get_recursion_context(void) { return -1; }
1342static inline void perf_swevent_put_recursion_context(int rctx) { }
1343static inline u64 perf_swevent_set_period(struct perf_event *event) { return 0; }
1344static inline void perf_event_enable(struct perf_event *event) { }
1345static inline void perf_event_disable(struct perf_event *event) { }
1346static inline int __perf_event_disable(void *info) { return -1; }
1347static inline void perf_event_task_tick(void) { }
1348static inline int perf_event_release_kernel(struct perf_event *event) { return 0; }
1349#endif
1350
1351#if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_CPU_SUP_INTEL)
1352extern void perf_restore_debug_store(void);
1353#else
1354static inline void perf_restore_debug_store(void) { }
1355#endif
1356
1357static __always_inline bool perf_raw_frag_last(const struct perf_raw_frag *frag)
1358{
1359 return frag->pad < sizeof(u64);
1360}
1361
1362#define perf_output_put(handle, x) perf_output_copy((handle), &(x), sizeof(x))
1363
1364struct perf_pmu_events_attr {
1365 struct device_attribute attr;
1366 u64 id;
1367 const char *event_str;
1368};
1369
1370struct perf_pmu_events_ht_attr {
1371 struct device_attribute attr;
1372 u64 id;
1373 const char *event_str_ht;
1374 const char *event_str_noht;
1375};
1376
1377ssize_t perf_event_sysfs_show(struct device *dev, struct device_attribute *attr,
1378 char *page);
1379
1380#define PMU_EVENT_ATTR(_name, _var, _id, _show) \
1381static struct perf_pmu_events_attr _var = { \
1382 .attr = __ATTR(_name, 0444, _show, NULL), \
1383 .id = _id, \
1384};
1385
1386#define PMU_EVENT_ATTR_STRING(_name, _var, _str) \
1387static struct perf_pmu_events_attr _var = { \
1388 .attr = __ATTR(_name, 0444, perf_event_sysfs_show, NULL), \
1389 .id = 0, \
1390 .event_str = _str, \
1391};
1392
1393#define PMU_FORMAT_ATTR(_name, _format) \
1394static ssize_t \
1395_name##_show(struct device *dev, \
1396 struct device_attribute *attr, \
1397 char *page) \
1398{ \
1399 BUILD_BUG_ON(sizeof(_format) >= PAGE_SIZE); \
1400 return sprintf(page, _format "\n"); \
1401} \
1402 \
1403static struct device_attribute format_attr_##_name = __ATTR_RO(_name)
1404
1405
1406#ifdef CONFIG_PERF_EVENTS
1407int perf_event_init_cpu(unsigned int cpu);
1408int perf_event_exit_cpu(unsigned int cpu);
1409#else
1410#define perf_event_init_cpu NULL
1411#define perf_event_exit_cpu NULL
1412#endif
1413
1414#endif
1415