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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 void (*handle_intel_pt_intr)(void);
34};
35
36#ifdef CONFIG_HAVE_HW_BREAKPOINT
37#include <asm/hw_breakpoint.h>
38#endif
39
40#include <linux/list.h>
41#include <linux/mutex.h>
42#include <linux/rculist.h>
43#include <linux/rcupdate.h>
44#include <linux/spinlock.h>
45#include <linux/hrtimer.h>
46#include <linux/fs.h>
47#include <linux/pid_namespace.h>
48#include <linux/workqueue.h>
49#include <linux/ftrace.h>
50#include <linux/cpu.h>
51#include <linux/irq_work.h>
52#include <linux/static_key.h>
53#include <linux/jump_label_ratelimit.h>
54#include <linux/atomic.h>
55#include <linux/sysfs.h>
56#include <linux/perf_regs.h>
57#include <linux/cgroup.h>
58#include <linux/refcount.h>
59#include <asm/local.h>
60
61struct perf_callchain_entry {
62 __u64 nr;
63 __u64 ip[0];
64};
65
66struct perf_callchain_entry_ctx {
67 struct perf_callchain_entry *entry;
68 u32 max_stack;
69 u32 nr;
70 short contexts;
71 bool contexts_maxed;
72};
73
74typedef unsigned long (*perf_copy_f)(void *dst, const void *src,
75 unsigned long off, unsigned long len);
76
77struct perf_raw_frag {
78 union {
79 struct perf_raw_frag *next;
80 unsigned long pad;
81 };
82 perf_copy_f copy;
83 void *data;
84 u32 size;
85} __packed;
86
87struct perf_raw_record {
88 struct perf_raw_frag frag;
89 u32 size;
90};
91
92
93
94
95
96
97
98
99
100
101struct perf_branch_stack {
102 __u64 nr;
103 struct perf_branch_entry entries[0];
104};
105
106struct task_struct;
107
108
109
110
111struct hw_perf_event_extra {
112 u64 config;
113 unsigned int reg;
114 int alloc;
115 int idx;
116};
117
118
119
120
121struct hw_perf_event {
122#ifdef CONFIG_PERF_EVENTS
123 union {
124 struct {
125 u64 config;
126 u64 last_tag;
127 unsigned long config_base;
128 unsigned long event_base;
129 int event_base_rdpmc;
130 int idx;
131 int last_cpu;
132 int flags;
133
134 struct hw_perf_event_extra extra_reg;
135 struct hw_perf_event_extra branch_reg;
136 };
137 struct {
138 struct hrtimer hrtimer;
139 };
140 struct {
141
142 struct list_head tp_list;
143 };
144 struct {
145 u64 pwr_acc;
146 u64 ptsc;
147 };
148#ifdef CONFIG_HAVE_HW_BREAKPOINT
149 struct {
150
151
152
153
154
155 struct arch_hw_breakpoint info;
156 struct list_head bp_list;
157 };
158#endif
159 struct {
160 u8 iommu_bank;
161 u8 iommu_cntr;
162 u16 padding;
163 u64 conf;
164 u64 conf1;
165 };
166 };
167
168
169
170
171 struct task_struct *target;
172
173
174
175
176
177 void *addr_filters;
178
179
180 unsigned long addr_filters_gen;
181
182
183
184
185#define PERF_HES_STOPPED 0x01
186#define PERF_HES_UPTODATE 0x02
187#define PERF_HES_ARCH 0x04
188
189 int state;
190
191
192
193
194
195 local64_t prev_count;
196
197
198
199
200 u64 sample_period;
201
202
203
204
205 u64 last_period;
206
207
208
209
210
211
212 local64_t period_left;
213
214
215
216
217
218 u64 interrupts_seq;
219 u64 interrupts;
220
221
222
223
224
225 u64 freq_time_stamp;
226 u64 freq_count_stamp;
227#endif
228};
229
230struct perf_event;
231
232
233
234
235#define PERF_PMU_TXN_ADD 0x1
236#define PERF_PMU_TXN_READ 0x2
237
238
239
240
241#define PERF_PMU_CAP_NO_INTERRUPT 0x01
242#define PERF_PMU_CAP_NO_NMI 0x02
243#define PERF_PMU_CAP_AUX_NO_SG 0x04
244#define PERF_PMU_CAP_EXTENDED_REGS 0x08
245#define PERF_PMU_CAP_EXCLUSIVE 0x10
246#define PERF_PMU_CAP_ITRACE 0x20
247#define PERF_PMU_CAP_HETEROGENEOUS_CPUS 0x40
248#define PERF_PMU_CAP_NO_EXCLUDE 0x80
249
250
251
252
253struct pmu {
254 struct list_head entry;
255
256 struct module *module;
257 struct device *dev;
258 const struct attribute_group **attr_groups;
259 const struct attribute_group **attr_update;
260 const char *name;
261 int type;
262
263
264
265
266 int capabilities;
267
268 int __percpu *pmu_disable_count;
269 struct perf_cpu_context __percpu *pmu_cpu_context;
270 atomic_t exclusive_cnt;
271 int task_ctx_nr;
272 int hrtimer_interval_ms;
273
274
275 unsigned int nr_addr_filters;
276
277
278
279
280
281 void (*pmu_enable) (struct pmu *pmu);
282 void (*pmu_disable) (struct pmu *pmu);
283
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298
299
300 int (*event_init) (struct perf_event *event);
301
302
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304
305
306 void (*event_mapped) (struct perf_event *event, struct mm_struct *mm);
307 void (*event_unmapped) (struct perf_event *event, struct mm_struct *mm);
308
309
310
311
312
313#define PERF_EF_START 0x01
314#define PERF_EF_RELOAD 0x02
315#define PERF_EF_UPDATE 0x04
316
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333
334
335 int (*add) (struct perf_event *event, int flags);
336 void (*del) (struct perf_event *event, int flags);
337
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354
355
356 void (*start) (struct perf_event *event, int flags);
357 void (*stop) (struct perf_event *event, int flags);
358
359
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362
363
364
365 void (*read) (struct perf_event *event);
366
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375
376
377 void (*start_txn) (struct pmu *pmu, unsigned int txn_flags);
378
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384
385
386 int (*commit_txn) (struct pmu *pmu);
387
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391
392
393 void (*cancel_txn) (struct pmu *pmu);
394
395
396
397
398
399 int (*event_idx) (struct perf_event *event);
400
401
402
403
404 void (*sched_task) (struct perf_event_context *ctx,
405 bool sched_in);
406
407
408
409 size_t task_ctx_size;
410
411
412
413
414
415 void *(*setup_aux) (struct perf_event *event, void **pages,
416 int nr_pages, bool overwrite);
417
418
419
420
421
422 void (*free_aux) (void *aux);
423
424
425
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430
431
432 int (*addr_filters_validate) (struct list_head *filters);
433
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444
445
446 void (*addr_filters_sync) (struct perf_event *event);
447
448
449
450
451
452 int (*filter_match) (struct perf_event *event);
453
454
455
456
457 int (*check_period) (struct perf_event *event, u64 value);
458};
459
460enum perf_addr_filter_action_t {
461 PERF_ADDR_FILTER_ACTION_STOP = 0,
462 PERF_ADDR_FILTER_ACTION_START,
463 PERF_ADDR_FILTER_ACTION_FILTER,
464};
465
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473
474
475
476struct perf_addr_filter {
477 struct list_head entry;
478 struct path path;
479 unsigned long offset;
480 unsigned long size;
481 enum perf_addr_filter_action_t action;
482};
483
484
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491
492
493
494struct perf_addr_filters_head {
495 struct list_head list;
496 raw_spinlock_t lock;
497 unsigned int nr_file_filters;
498};
499
500struct perf_addr_filter_range {
501 unsigned long start;
502 unsigned long size;
503};
504
505
506
507
508enum perf_event_state {
509 PERF_EVENT_STATE_DEAD = -4,
510 PERF_EVENT_STATE_EXIT = -3,
511 PERF_EVENT_STATE_ERROR = -2,
512 PERF_EVENT_STATE_OFF = -1,
513 PERF_EVENT_STATE_INACTIVE = 0,
514 PERF_EVENT_STATE_ACTIVE = 1,
515};
516
517struct file;
518struct perf_sample_data;
519
520typedef void (*perf_overflow_handler_t)(struct perf_event *,
521 struct perf_sample_data *,
522 struct pt_regs *regs);
523
524
525
526
527
528
529
530
531#define PERF_EV_CAP_SOFTWARE BIT(0)
532#define PERF_EV_CAP_READ_ACTIVE_PKG BIT(1)
533
534#define SWEVENT_HLIST_BITS 8
535#define SWEVENT_HLIST_SIZE (1 << SWEVENT_HLIST_BITS)
536
537struct swevent_hlist {
538 struct hlist_head heads[SWEVENT_HLIST_SIZE];
539 struct rcu_head rcu_head;
540};
541
542#define PERF_ATTACH_CONTEXT 0x01
543#define PERF_ATTACH_GROUP 0x02
544#define PERF_ATTACH_TASK 0x04
545#define PERF_ATTACH_TASK_DATA 0x08
546#define PERF_ATTACH_ITRACE 0x10
547
548struct perf_cgroup;
549struct ring_buffer;
550
551struct pmu_event_list {
552 raw_spinlock_t lock;
553 struct list_head list;
554};
555
556#define for_each_sibling_event(sibling, event) \
557 if ((event)->group_leader == (event)) \
558 list_for_each_entry((sibling), &(event)->sibling_list, sibling_list)
559
560
561
562
563struct perf_event {
564#ifdef CONFIG_PERF_EVENTS
565
566
567
568
569
570 struct list_head event_entry;
571
572
573
574
575
576 struct list_head sibling_list;
577 struct list_head active_list;
578
579
580
581 struct rb_node group_node;
582 u64 group_index;
583
584
585
586
587
588 struct list_head migrate_entry;
589
590 struct hlist_node hlist_entry;
591 struct list_head active_entry;
592 int nr_siblings;
593
594
595 int event_caps;
596
597 int group_caps;
598
599 struct perf_event *group_leader;
600 struct pmu *pmu;
601 void *pmu_private;
602
603 enum perf_event_state state;
604 unsigned int attach_state;
605 local64_t count;
606 atomic64_t child_count;
607
608
609
610
611
612
613
614 u64 total_time_enabled;
615 u64 total_time_running;
616 u64 tstamp;
617
618
619
620
621
622
623
624
625
626 u64 shadow_ctx_time;
627
628 struct perf_event_attr attr;
629 u16 header_size;
630 u16 id_header_size;
631 u16 read_size;
632 struct hw_perf_event hw;
633
634 struct perf_event_context *ctx;
635 atomic_long_t refcount;
636
637
638
639
640
641 atomic64_t child_total_time_enabled;
642 atomic64_t child_total_time_running;
643
644
645
646
647 struct mutex child_mutex;
648 struct list_head child_list;
649 struct perf_event *parent;
650
651 int oncpu;
652 int cpu;
653
654 struct list_head owner_entry;
655 struct task_struct *owner;
656
657
658 struct mutex mmap_mutex;
659 atomic_t mmap_count;
660
661 struct ring_buffer *rb;
662 struct list_head rb_entry;
663 unsigned long rcu_batches;
664 int rcu_pending;
665
666
667 wait_queue_head_t waitq;
668 struct fasync_struct *fasync;
669
670
671 int pending_wakeup;
672 int pending_kill;
673 int pending_disable;
674 struct irq_work pending;
675
676 atomic_t event_limit;
677
678
679 struct perf_addr_filters_head addr_filters;
680
681 struct perf_addr_filter_range *addr_filter_ranges;
682 unsigned long addr_filters_gen;
683
684 void (*destroy)(struct perf_event *);
685 struct rcu_head rcu_head;
686
687 struct pid_namespace *ns;
688 u64 id;
689
690 u64 (*clock)(void);
691 perf_overflow_handler_t overflow_handler;
692 void *overflow_handler_context;
693#ifdef CONFIG_BPF_SYSCALL
694 perf_overflow_handler_t orig_overflow_handler;
695 struct bpf_prog *prog;
696#endif
697
698#ifdef CONFIG_EVENT_TRACING
699 struct trace_event_call *tp_event;
700 struct event_filter *filter;
701#ifdef CONFIG_FUNCTION_TRACER
702 struct ftrace_ops ftrace_ops;
703#endif
704#endif
705
706#ifdef CONFIG_CGROUP_PERF
707 struct perf_cgroup *cgrp;
708#endif
709
710 struct list_head sb_list;
711#endif
712};
713
714
715struct perf_event_groups {
716 struct rb_root tree;
717 u64 index;
718};
719
720
721
722
723
724
725struct perf_event_context {
726 struct pmu *pmu;
727
728
729
730
731 raw_spinlock_t lock;
732
733
734
735
736
737 struct mutex mutex;
738
739 struct list_head active_ctx_list;
740 struct perf_event_groups pinned_groups;
741 struct perf_event_groups flexible_groups;
742 struct list_head event_list;
743
744 struct list_head pinned_active;
745 struct list_head flexible_active;
746
747 int nr_events;
748 int nr_active;
749 int is_active;
750 int nr_stat;
751 int nr_freq;
752 int rotate_disable;
753
754
755
756
757 int rotate_necessary;
758 refcount_t refcount;
759 struct task_struct *task;
760
761
762
763
764 u64 time;
765 u64 timestamp;
766
767
768
769
770
771 struct perf_event_context *parent_ctx;
772 u64 parent_gen;
773 u64 generation;
774 int pin_count;
775#ifdef CONFIG_CGROUP_PERF
776 int nr_cgroups;
777#endif
778 void *task_ctx_data;
779 struct rcu_head rcu_head;
780};
781
782
783
784
785
786#define PERF_NR_CONTEXTS 4
787
788
789
790
791struct perf_cpu_context {
792 struct perf_event_context ctx;
793 struct perf_event_context *task_ctx;
794 int active_oncpu;
795 int exclusive;
796
797 raw_spinlock_t hrtimer_lock;
798 struct hrtimer hrtimer;
799 ktime_t hrtimer_interval;
800 unsigned int hrtimer_active;
801
802#ifdef CONFIG_CGROUP_PERF
803 struct perf_cgroup *cgrp;
804 struct list_head cgrp_cpuctx_entry;
805#endif
806
807 struct list_head sched_cb_entry;
808 int sched_cb_usage;
809
810 int online;
811};
812
813struct perf_output_handle {
814 struct perf_event *event;
815 struct ring_buffer *rb;
816 unsigned long wakeup;
817 unsigned long size;
818 u64 aux_flags;
819 union {
820 void *addr;
821 unsigned long head;
822 };
823 int page;
824};
825
826struct bpf_perf_event_data_kern {
827 bpf_user_pt_regs_t *regs;
828 struct perf_sample_data *data;
829 struct perf_event *event;
830};
831
832#ifdef CONFIG_CGROUP_PERF
833
834
835
836
837
838struct perf_cgroup_info {
839 u64 time;
840 u64 timestamp;
841};
842
843struct perf_cgroup {
844 struct cgroup_subsys_state css;
845 struct perf_cgroup_info __percpu *info;
846};
847
848
849
850
851
852
853static inline struct perf_cgroup *
854perf_cgroup_from_task(struct task_struct *task, struct perf_event_context *ctx)
855{
856 return container_of(task_css_check(task, perf_event_cgrp_id,
857 ctx ? lockdep_is_held(&ctx->lock)
858 : true),
859 struct perf_cgroup, css);
860}
861#endif
862
863#ifdef CONFIG_PERF_EVENTS
864
865extern void *perf_aux_output_begin(struct perf_output_handle *handle,
866 struct perf_event *event);
867extern void perf_aux_output_end(struct perf_output_handle *handle,
868 unsigned long size);
869extern int perf_aux_output_skip(struct perf_output_handle *handle,
870 unsigned long size);
871extern void *perf_get_aux(struct perf_output_handle *handle);
872extern void perf_aux_output_flag(struct perf_output_handle *handle, u64 flags);
873extern void perf_event_itrace_started(struct perf_event *event);
874
875extern int perf_pmu_register(struct pmu *pmu, const char *name, int type);
876extern void perf_pmu_unregister(struct pmu *pmu);
877
878extern int perf_num_counters(void);
879extern const char *perf_pmu_name(void);
880extern void __perf_event_task_sched_in(struct task_struct *prev,
881 struct task_struct *task);
882extern void __perf_event_task_sched_out(struct task_struct *prev,
883 struct task_struct *next);
884extern int perf_event_init_task(struct task_struct *child);
885extern void perf_event_exit_task(struct task_struct *child);
886extern void perf_event_free_task(struct task_struct *task);
887extern void perf_event_delayed_put(struct task_struct *task);
888extern struct file *perf_event_get(unsigned int fd);
889extern const struct perf_event *perf_get_event(struct file *file);
890extern const struct perf_event_attr *perf_event_attrs(struct perf_event *event);
891extern void perf_event_print_debug(void);
892extern void perf_pmu_disable(struct pmu *pmu);
893extern void perf_pmu_enable(struct pmu *pmu);
894extern void perf_sched_cb_dec(struct pmu *pmu);
895extern void perf_sched_cb_inc(struct pmu *pmu);
896extern int perf_event_task_disable(void);
897extern int perf_event_task_enable(void);
898
899extern void perf_pmu_resched(struct pmu *pmu);
900
901extern int perf_event_refresh(struct perf_event *event, int refresh);
902extern void perf_event_update_userpage(struct perf_event *event);
903extern int perf_event_release_kernel(struct perf_event *event);
904extern struct perf_event *
905perf_event_create_kernel_counter(struct perf_event_attr *attr,
906 int cpu,
907 struct task_struct *task,
908 perf_overflow_handler_t callback,
909 void *context);
910extern void perf_pmu_migrate_context(struct pmu *pmu,
911 int src_cpu, int dst_cpu);
912int perf_event_read_local(struct perf_event *event, u64 *value,
913 u64 *enabled, u64 *running);
914extern u64 perf_event_read_value(struct perf_event *event,
915 u64 *enabled, u64 *running);
916
917
918struct perf_sample_data {
919
920
921
922
923 u64 addr;
924 struct perf_raw_record *raw;
925 struct perf_branch_stack *br_stack;
926 u64 period;
927 u64 weight;
928 u64 txn;
929 union perf_mem_data_src data_src;
930
931
932
933
934
935 u64 type;
936 u64 ip;
937 struct {
938 u32 pid;
939 u32 tid;
940 } tid_entry;
941 u64 time;
942 u64 id;
943 u64 stream_id;
944 struct {
945 u32 cpu;
946 u32 reserved;
947 } cpu_entry;
948 struct perf_callchain_entry *callchain;
949
950
951
952
953
954 struct perf_regs regs_user;
955 struct pt_regs regs_user_copy;
956
957 struct perf_regs regs_intr;
958 u64 stack_user_size;
959
960 u64 phys_addr;
961} ____cacheline_aligned;
962
963
964#define PERF_MEM_NA (PERF_MEM_S(OP, NA) |\
965 PERF_MEM_S(LVL, NA) |\
966 PERF_MEM_S(SNOOP, NA) |\
967 PERF_MEM_S(LOCK, NA) |\
968 PERF_MEM_S(TLB, NA))
969
970static inline void perf_sample_data_init(struct perf_sample_data *data,
971 u64 addr, u64 period)
972{
973
974 data->addr = addr;
975 data->raw = NULL;
976 data->br_stack = NULL;
977 data->period = period;
978 data->weight = 0;
979 data->data_src.val = PERF_MEM_NA;
980 data->txn = 0;
981}
982
983extern void perf_output_sample(struct perf_output_handle *handle,
984 struct perf_event_header *header,
985 struct perf_sample_data *data,
986 struct perf_event *event);
987extern void perf_prepare_sample(struct perf_event_header *header,
988 struct perf_sample_data *data,
989 struct perf_event *event,
990 struct pt_regs *regs);
991
992extern int perf_event_overflow(struct perf_event *event,
993 struct perf_sample_data *data,
994 struct pt_regs *regs);
995
996extern void perf_event_output_forward(struct perf_event *event,
997 struct perf_sample_data *data,
998 struct pt_regs *regs);
999extern void perf_event_output_backward(struct perf_event *event,
1000 struct perf_sample_data *data,
1001 struct pt_regs *regs);
1002extern int perf_event_output(struct perf_event *event,
1003 struct perf_sample_data *data,
1004 struct pt_regs *regs);
1005
1006static inline bool
1007is_default_overflow_handler(struct perf_event *event)
1008{
1009 if (likely(event->overflow_handler == perf_event_output_forward))
1010 return true;
1011 if (unlikely(event->overflow_handler == perf_event_output_backward))
1012 return true;
1013 return false;
1014}
1015
1016extern void
1017perf_event_header__init_id(struct perf_event_header *header,
1018 struct perf_sample_data *data,
1019 struct perf_event *event);
1020extern void
1021perf_event__output_id_sample(struct perf_event *event,
1022 struct perf_output_handle *handle,
1023 struct perf_sample_data *sample);
1024
1025extern void
1026perf_log_lost_samples(struct perf_event *event, u64 lost);
1027
1028static inline bool event_has_any_exclude_flag(struct perf_event *event)
1029{
1030 struct perf_event_attr *attr = &event->attr;
1031
1032 return attr->exclude_idle || attr->exclude_user ||
1033 attr->exclude_kernel || attr->exclude_hv ||
1034 attr->exclude_guest || attr->exclude_host;
1035}
1036
1037static inline bool is_sampling_event(struct perf_event *event)
1038{
1039 return event->attr.sample_period != 0;
1040}
1041
1042
1043
1044
1045static inline int is_software_event(struct perf_event *event)
1046{
1047 return event->event_caps & PERF_EV_CAP_SOFTWARE;
1048}
1049
1050
1051
1052
1053static inline int in_software_context(struct perf_event *event)
1054{
1055 return event->ctx->pmu->task_ctx_nr == perf_sw_context;
1056}
1057
1058static inline int is_exclusive_pmu(struct pmu *pmu)
1059{
1060 return pmu->capabilities & PERF_PMU_CAP_EXCLUSIVE;
1061}
1062
1063extern struct static_key perf_swevent_enabled[PERF_COUNT_SW_MAX];
1064
1065extern void ___perf_sw_event(u32, u64, struct pt_regs *, u64);
1066extern void __perf_sw_event(u32, u64, struct pt_regs *, u64);
1067
1068#ifndef perf_arch_fetch_caller_regs
1069static inline void perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip) { }
1070#endif
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086static inline void perf_fetch_caller_regs(struct pt_regs *regs)
1087{
1088 perf_arch_fetch_caller_regs(regs, CALLER_ADDR0);
1089}
1090
1091static __always_inline void
1092perf_sw_event(u32 event_id, u64 nr, struct pt_regs *regs, u64 addr)
1093{
1094 if (static_key_false(&perf_swevent_enabled[event_id]))
1095 __perf_sw_event(event_id, nr, regs, addr);
1096}
1097
1098DECLARE_PER_CPU(struct pt_regs, __perf_regs[4]);
1099
1100
1101
1102
1103
1104
1105static __always_inline void
1106perf_sw_event_sched(u32 event_id, u64 nr, u64 addr)
1107{
1108 if (static_key_false(&perf_swevent_enabled[event_id])) {
1109 struct pt_regs *regs = this_cpu_ptr(&__perf_regs[0]);
1110
1111 perf_fetch_caller_regs(regs);
1112 ___perf_sw_event(event_id, nr, regs, addr);
1113 }
1114}
1115
1116extern struct static_key_false perf_sched_events;
1117
1118static __always_inline bool
1119perf_sw_migrate_enabled(void)
1120{
1121 if (static_key_false(&perf_swevent_enabled[PERF_COUNT_SW_CPU_MIGRATIONS]))
1122 return true;
1123 return false;
1124}
1125
1126static inline void perf_event_task_migrate(struct task_struct *task)
1127{
1128 if (perf_sw_migrate_enabled())
1129 task->sched_migrated = 1;
1130}
1131
1132static inline void perf_event_task_sched_in(struct task_struct *prev,
1133 struct task_struct *task)
1134{
1135 if (static_branch_unlikely(&perf_sched_events))
1136 __perf_event_task_sched_in(prev, task);
1137
1138 if (perf_sw_migrate_enabled() && task->sched_migrated) {
1139 struct pt_regs *regs = this_cpu_ptr(&__perf_regs[0]);
1140
1141 perf_fetch_caller_regs(regs);
1142 ___perf_sw_event(PERF_COUNT_SW_CPU_MIGRATIONS, 1, regs, 0);
1143 task->sched_migrated = 0;
1144 }
1145}
1146
1147static inline void perf_event_task_sched_out(struct task_struct *prev,
1148 struct task_struct *next)
1149{
1150 perf_sw_event_sched(PERF_COUNT_SW_CONTEXT_SWITCHES, 1, 0);
1151
1152 if (static_branch_unlikely(&perf_sched_events))
1153 __perf_event_task_sched_out(prev, next);
1154}
1155
1156extern void perf_event_mmap(struct vm_area_struct *vma);
1157
1158extern void perf_event_ksymbol(u16 ksym_type, u64 addr, u32 len,
1159 bool unregister, const char *sym);
1160extern void perf_event_bpf_event(struct bpf_prog *prog,
1161 enum perf_bpf_event_type type,
1162 u16 flags);
1163
1164extern struct perf_guest_info_callbacks *perf_guest_cbs;
1165extern int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
1166extern int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
1167
1168extern void perf_event_exec(void);
1169extern void perf_event_comm(struct task_struct *tsk, bool exec);
1170extern void perf_event_namespaces(struct task_struct *tsk);
1171extern void perf_event_fork(struct task_struct *tsk);
1172
1173
1174DECLARE_PER_CPU(struct perf_callchain_entry, perf_callchain_entry);
1175
1176extern void perf_callchain_user(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs);
1177extern void perf_callchain_kernel(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs);
1178extern struct perf_callchain_entry *
1179get_perf_callchain(struct pt_regs *regs, u32 init_nr, bool kernel, bool user,
1180 u32 max_stack, bool crosstask, bool add_mark);
1181extern struct perf_callchain_entry *perf_callchain(struct perf_event *event, struct pt_regs *regs);
1182extern int get_callchain_buffers(int max_stack);
1183extern void put_callchain_buffers(void);
1184
1185extern int sysctl_perf_event_max_stack;
1186extern int sysctl_perf_event_max_contexts_per_stack;
1187
1188static inline int perf_callchain_store_context(struct perf_callchain_entry_ctx *ctx, u64 ip)
1189{
1190 if (ctx->contexts < sysctl_perf_event_max_contexts_per_stack) {
1191 struct perf_callchain_entry *entry = ctx->entry;
1192 entry->ip[entry->nr++] = ip;
1193 ++ctx->contexts;
1194 return 0;
1195 } else {
1196 ctx->contexts_maxed = true;
1197 return -1;
1198 }
1199}
1200
1201static inline int perf_callchain_store(struct perf_callchain_entry_ctx *ctx, u64 ip)
1202{
1203 if (ctx->nr < ctx->max_stack && !ctx->contexts_maxed) {
1204 struct perf_callchain_entry *entry = ctx->entry;
1205 entry->ip[entry->nr++] = ip;
1206 ++ctx->nr;
1207 return 0;
1208 } else {
1209 return -1;
1210 }
1211}
1212
1213extern int sysctl_perf_event_paranoid;
1214extern int sysctl_perf_event_mlock;
1215extern int sysctl_perf_event_sample_rate;
1216extern int sysctl_perf_cpu_time_max_percent;
1217
1218extern void perf_sample_event_took(u64 sample_len_ns);
1219
1220extern int perf_proc_update_handler(struct ctl_table *table, int write,
1221 void __user *buffer, size_t *lenp,
1222 loff_t *ppos);
1223extern int perf_cpu_time_max_percent_handler(struct ctl_table *table, int write,
1224 void __user *buffer, size_t *lenp,
1225 loff_t *ppos);
1226
1227int perf_event_max_stack_handler(struct ctl_table *table, int write,
1228 void __user *buffer, size_t *lenp, loff_t *ppos);
1229
1230static inline bool perf_paranoid_tracepoint_raw(void)
1231{
1232 return sysctl_perf_event_paranoid > -1;
1233}
1234
1235static inline bool perf_paranoid_cpu(void)
1236{
1237 return sysctl_perf_event_paranoid > 0;
1238}
1239
1240static inline bool perf_paranoid_kernel(void)
1241{
1242 return sysctl_perf_event_paranoid > 1;
1243}
1244
1245extern void perf_event_init(void);
1246extern void perf_tp_event(u16 event_type, u64 count, void *record,
1247 int entry_size, struct pt_regs *regs,
1248 struct hlist_head *head, int rctx,
1249 struct task_struct *task);
1250extern void perf_bp_event(struct perf_event *event, void *data);
1251
1252#ifndef perf_misc_flags
1253# define perf_misc_flags(regs) \
1254 (user_mode(regs) ? PERF_RECORD_MISC_USER : PERF_RECORD_MISC_KERNEL)
1255# define perf_instruction_pointer(regs) instruction_pointer(regs)
1256#endif
1257#ifndef perf_arch_bpf_user_pt_regs
1258# define perf_arch_bpf_user_pt_regs(regs) regs
1259#endif
1260
1261static inline bool has_branch_stack(struct perf_event *event)
1262{
1263 return event->attr.sample_type & PERF_SAMPLE_BRANCH_STACK;
1264}
1265
1266static inline bool needs_branch_stack(struct perf_event *event)
1267{
1268 return event->attr.branch_sample_type != 0;
1269}
1270
1271static inline bool has_aux(struct perf_event *event)
1272{
1273 return event->pmu->setup_aux;
1274}
1275
1276static inline bool is_write_backward(struct perf_event *event)
1277{
1278 return !!event->attr.write_backward;
1279}
1280
1281static inline bool has_addr_filter(struct perf_event *event)
1282{
1283 return event->pmu->nr_addr_filters;
1284}
1285
1286
1287
1288
1289static inline struct perf_addr_filters_head *
1290perf_event_addr_filters(struct perf_event *event)
1291{
1292 struct perf_addr_filters_head *ifh = &event->addr_filters;
1293
1294 if (event->parent)
1295 ifh = &event->parent->addr_filters;
1296
1297 return ifh;
1298}
1299
1300extern void perf_event_addr_filters_sync(struct perf_event *event);
1301
1302extern int perf_output_begin(struct perf_output_handle *handle,
1303 struct perf_event *event, unsigned int size);
1304extern int perf_output_begin_forward(struct perf_output_handle *handle,
1305 struct perf_event *event,
1306 unsigned int size);
1307extern int perf_output_begin_backward(struct perf_output_handle *handle,
1308 struct perf_event *event,
1309 unsigned int size);
1310
1311extern void perf_output_end(struct perf_output_handle *handle);
1312extern unsigned int perf_output_copy(struct perf_output_handle *handle,
1313 const void *buf, unsigned int len);
1314extern unsigned int perf_output_skip(struct perf_output_handle *handle,
1315 unsigned int len);
1316extern int perf_swevent_get_recursion_context(void);
1317extern void perf_swevent_put_recursion_context(int rctx);
1318extern u64 perf_swevent_set_period(struct perf_event *event);
1319extern void perf_event_enable(struct perf_event *event);
1320extern void perf_event_disable(struct perf_event *event);
1321extern void perf_event_disable_local(struct perf_event *event);
1322extern void perf_event_disable_inatomic(struct perf_event *event);
1323extern void perf_event_task_tick(void);
1324extern int perf_event_account_interrupt(struct perf_event *event);
1325#else
1326static inline void *
1327perf_aux_output_begin(struct perf_output_handle *handle,
1328 struct perf_event *event) { return NULL; }
1329static inline void
1330perf_aux_output_end(struct perf_output_handle *handle, unsigned long size)
1331 { }
1332static inline int
1333perf_aux_output_skip(struct perf_output_handle *handle,
1334 unsigned long size) { return -EINVAL; }
1335static inline void *
1336perf_get_aux(struct perf_output_handle *handle) { return NULL; }
1337static inline void
1338perf_event_task_migrate(struct task_struct *task) { }
1339static inline void
1340perf_event_task_sched_in(struct task_struct *prev,
1341 struct task_struct *task) { }
1342static inline void
1343perf_event_task_sched_out(struct task_struct *prev,
1344 struct task_struct *next) { }
1345static inline int perf_event_init_task(struct task_struct *child) { return 0; }
1346static inline void perf_event_exit_task(struct task_struct *child) { }
1347static inline void perf_event_free_task(struct task_struct *task) { }
1348static inline void perf_event_delayed_put(struct task_struct *task) { }
1349static inline struct file *perf_event_get(unsigned int fd) { return ERR_PTR(-EINVAL); }
1350static inline const struct perf_event *perf_get_event(struct file *file)
1351{
1352 return ERR_PTR(-EINVAL);
1353}
1354static inline const struct perf_event_attr *perf_event_attrs(struct perf_event *event)
1355{
1356 return ERR_PTR(-EINVAL);
1357}
1358static inline int perf_event_read_local(struct perf_event *event, u64 *value,
1359 u64 *enabled, u64 *running)
1360{
1361 return -EINVAL;
1362}
1363static inline void perf_event_print_debug(void) { }
1364static inline int perf_event_task_disable(void) { return -EINVAL; }
1365static inline int perf_event_task_enable(void) { return -EINVAL; }
1366static inline int perf_event_refresh(struct perf_event *event, int refresh)
1367{
1368 return -EINVAL;
1369}
1370
1371static inline void
1372perf_sw_event(u32 event_id, u64 nr, struct pt_regs *regs, u64 addr) { }
1373static inline void
1374perf_sw_event_sched(u32 event_id, u64 nr, u64 addr) { }
1375static inline void
1376perf_bp_event(struct perf_event *event, void *data) { }
1377
1378static inline int perf_register_guest_info_callbacks
1379(struct perf_guest_info_callbacks *callbacks) { return 0; }
1380static inline int perf_unregister_guest_info_callbacks
1381(struct perf_guest_info_callbacks *callbacks) { return 0; }
1382
1383static inline void perf_event_mmap(struct vm_area_struct *vma) { }
1384
1385typedef int (perf_ksymbol_get_name_f)(char *name, int name_len, void *data);
1386static inline void perf_event_ksymbol(u16 ksym_type, u64 addr, u32 len,
1387 bool unregister, const char *sym) { }
1388static inline void perf_event_bpf_event(struct bpf_prog *prog,
1389 enum perf_bpf_event_type type,
1390 u16 flags) { }
1391static inline void perf_event_exec(void) { }
1392static inline void perf_event_comm(struct task_struct *tsk, bool exec) { }
1393static inline void perf_event_namespaces(struct task_struct *tsk) { }
1394static inline void perf_event_fork(struct task_struct *tsk) { }
1395static inline void perf_event_init(void) { }
1396static inline int perf_swevent_get_recursion_context(void) { return -1; }
1397static inline void perf_swevent_put_recursion_context(int rctx) { }
1398static inline u64 perf_swevent_set_period(struct perf_event *event) { return 0; }
1399static inline void perf_event_enable(struct perf_event *event) { }
1400static inline void perf_event_disable(struct perf_event *event) { }
1401static inline int __perf_event_disable(void *info) { return -1; }
1402static inline void perf_event_task_tick(void) { }
1403static inline int perf_event_release_kernel(struct perf_event *event) { return 0; }
1404#endif
1405
1406#if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_CPU_SUP_INTEL)
1407extern void perf_restore_debug_store(void);
1408#else
1409static inline void perf_restore_debug_store(void) { }
1410#endif
1411
1412static __always_inline bool perf_raw_frag_last(const struct perf_raw_frag *frag)
1413{
1414 return frag->pad < sizeof(u64);
1415}
1416
1417#define perf_output_put(handle, x) perf_output_copy((handle), &(x), sizeof(x))
1418
1419struct perf_pmu_events_attr {
1420 struct device_attribute attr;
1421 u64 id;
1422 const char *event_str;
1423};
1424
1425struct perf_pmu_events_ht_attr {
1426 struct device_attribute attr;
1427 u64 id;
1428 const char *event_str_ht;
1429 const char *event_str_noht;
1430};
1431
1432ssize_t perf_event_sysfs_show(struct device *dev, struct device_attribute *attr,
1433 char *page);
1434
1435#define PMU_EVENT_ATTR(_name, _var, _id, _show) \
1436static struct perf_pmu_events_attr _var = { \
1437 .attr = __ATTR(_name, 0444, _show, NULL), \
1438 .id = _id, \
1439};
1440
1441#define PMU_EVENT_ATTR_STRING(_name, _var, _str) \
1442static struct perf_pmu_events_attr _var = { \
1443 .attr = __ATTR(_name, 0444, perf_event_sysfs_show, NULL), \
1444 .id = 0, \
1445 .event_str = _str, \
1446};
1447
1448#define PMU_FORMAT_ATTR(_name, _format) \
1449static ssize_t \
1450_name##_show(struct device *dev, \
1451 struct device_attribute *attr, \
1452 char *page) \
1453{ \
1454 BUILD_BUG_ON(sizeof(_format) >= PAGE_SIZE); \
1455 return sprintf(page, _format "\n"); \
1456} \
1457 \
1458static struct device_attribute format_attr_##_name = __ATTR_RO(_name)
1459
1460
1461#ifdef CONFIG_PERF_EVENTS
1462int perf_event_init_cpu(unsigned int cpu);
1463int perf_event_exit_cpu(unsigned int cpu);
1464#else
1465#define perf_event_init_cpu NULL
1466#define perf_event_exit_cpu NULL
1467#endif
1468
1469#endif
1470