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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 <linux/security.h>
60#include <asm/local.h>
61
62struct perf_callchain_entry {
63 __u64 nr;
64 __u64 ip[];
65};
66
67struct perf_callchain_entry_ctx {
68 struct perf_callchain_entry *entry;
69 u32 max_stack;
70 u32 nr;
71 short contexts;
72 bool contexts_maxed;
73};
74
75typedef unsigned long (*perf_copy_f)(void *dst, const void *src,
76 unsigned long off, unsigned long len);
77
78struct perf_raw_frag {
79 union {
80 struct perf_raw_frag *next;
81 unsigned long pad;
82 };
83 perf_copy_f copy;
84 void *data;
85 u32 size;
86} __packed;
87
88struct perf_raw_record {
89 struct perf_raw_frag frag;
90 u32 size;
91};
92
93
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111
112
113struct perf_branch_stack {
114 __u64 nr;
115 __u64 hw_idx;
116 struct perf_branch_entry entries[];
117};
118
119struct task_struct;
120
121
122
123
124struct hw_perf_event_extra {
125 u64 config;
126 unsigned int reg;
127 int alloc;
128 int idx;
129};
130
131
132
133
134struct hw_perf_event {
135#ifdef CONFIG_PERF_EVENTS
136 union {
137 struct {
138 u64 config;
139 u64 last_tag;
140 unsigned long config_base;
141 unsigned long event_base;
142 int event_base_rdpmc;
143 int idx;
144 int last_cpu;
145 int flags;
146
147 struct hw_perf_event_extra extra_reg;
148 struct hw_perf_event_extra branch_reg;
149 };
150 struct {
151 struct hrtimer hrtimer;
152 };
153 struct {
154
155 struct list_head tp_list;
156 };
157 struct {
158 u64 pwr_acc;
159 u64 ptsc;
160 };
161#ifdef CONFIG_HAVE_HW_BREAKPOINT
162 struct {
163
164
165
166
167
168 struct arch_hw_breakpoint info;
169 struct list_head bp_list;
170 };
171#endif
172 struct {
173 u8 iommu_bank;
174 u8 iommu_cntr;
175 u16 padding;
176 u64 conf;
177 u64 conf1;
178 };
179 };
180
181
182
183
184 struct task_struct *target;
185
186
187
188
189
190 void *addr_filters;
191
192
193 unsigned long addr_filters_gen;
194
195
196
197
198#define PERF_HES_STOPPED 0x01
199#define PERF_HES_UPTODATE 0x02
200#define PERF_HES_ARCH 0x04
201
202 int state;
203
204
205
206
207
208 local64_t prev_count;
209
210
211
212
213 u64 sample_period;
214
215 union {
216 struct {
217
218
219
220 u64 last_period;
221
222
223
224
225
226
227
228 local64_t period_left;
229 };
230 struct {
231 u64 saved_metric;
232 u64 saved_slots;
233 };
234 };
235
236
237
238
239
240 u64 interrupts_seq;
241 u64 interrupts;
242
243
244
245
246
247 u64 freq_time_stamp;
248 u64 freq_count_stamp;
249#endif
250};
251
252struct perf_event;
253
254
255
256
257#define PERF_PMU_TXN_ADD 0x1
258#define PERF_PMU_TXN_READ 0x2
259
260
261
262
263#define PERF_PMU_CAP_NO_INTERRUPT 0x01
264#define PERF_PMU_CAP_NO_NMI 0x02
265#define PERF_PMU_CAP_AUX_NO_SG 0x04
266#define PERF_PMU_CAP_EXTENDED_REGS 0x08
267#define PERF_PMU_CAP_EXCLUSIVE 0x10
268#define PERF_PMU_CAP_ITRACE 0x20
269#define PERF_PMU_CAP_HETEROGENEOUS_CPUS 0x40
270#define PERF_PMU_CAP_NO_EXCLUDE 0x80
271#define PERF_PMU_CAP_AUX_OUTPUT 0x100
272
273struct perf_output_handle;
274
275
276
277
278struct pmu {
279 struct list_head entry;
280
281 struct module *module;
282 struct device *dev;
283 const struct attribute_group **attr_groups;
284 const struct attribute_group **attr_update;
285 const char *name;
286 int type;
287
288
289
290
291 int capabilities;
292
293 int __percpu *pmu_disable_count;
294 struct perf_cpu_context __percpu *pmu_cpu_context;
295 atomic_t exclusive_cnt;
296 int task_ctx_nr;
297 int hrtimer_interval_ms;
298
299
300 unsigned int nr_addr_filters;
301
302
303
304
305
306 void (*pmu_enable) (struct pmu *pmu);
307 void (*pmu_disable) (struct pmu *pmu);
308
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324
325 int (*event_init) (struct perf_event *event);
326
327
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329
330
331 void (*event_mapped) (struct perf_event *event, struct mm_struct *mm);
332 void (*event_unmapped) (struct perf_event *event, struct mm_struct *mm);
333
334
335
336
337
338#define PERF_EF_START 0x01
339#define PERF_EF_RELOAD 0x02
340#define PERF_EF_UPDATE 0x04
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359
360 int (*add) (struct perf_event *event, int flags);
361 void (*del) (struct perf_event *event, int flags);
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380
381 void (*start) (struct perf_event *event, int flags);
382 void (*stop) (struct perf_event *event, int flags);
383
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389
390 void (*read) (struct perf_event *event);
391
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401
402 void (*start_txn) (struct pmu *pmu, unsigned int txn_flags);
403
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410
411 int (*commit_txn) (struct pmu *pmu);
412
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416
417
418 void (*cancel_txn) (struct pmu *pmu);
419
420
421
422
423
424 int (*event_idx) (struct perf_event *event);
425
426
427
428
429 void (*sched_task) (struct perf_event_context *ctx,
430 bool sched_in);
431
432
433
434
435 struct kmem_cache *task_ctx_cache;
436
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440
441
442
443 void (*swap_task_ctx) (struct perf_event_context *prev,
444 struct perf_event_context *next);
445
446
447
448
449
450 void *(*setup_aux) (struct perf_event *event, void **pages,
451 int nr_pages, bool overwrite);
452
453
454
455
456
457 void (*free_aux) (void *aux);
458
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467
468 long (*snapshot_aux) (struct perf_event *event,
469 struct perf_output_handle *handle,
470 unsigned long size);
471
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477
478
479
480 int (*addr_filters_validate) (struct list_head *filters);
481
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493
494 void (*addr_filters_sync) (struct perf_event *event);
495
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503
504 int (*aux_output_match) (struct perf_event *event);
505
506
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508
509
510 int (*filter_match) (struct perf_event *event);
511
512
513
514
515 int (*check_period) (struct perf_event *event, u64 value);
516};
517
518enum perf_addr_filter_action_t {
519 PERF_ADDR_FILTER_ACTION_STOP = 0,
520 PERF_ADDR_FILTER_ACTION_START,
521 PERF_ADDR_FILTER_ACTION_FILTER,
522};
523
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533
534struct perf_addr_filter {
535 struct list_head entry;
536 struct path path;
537 unsigned long offset;
538 unsigned long size;
539 enum perf_addr_filter_action_t action;
540};
541
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551
552struct perf_addr_filters_head {
553 struct list_head list;
554 raw_spinlock_t lock;
555 unsigned int nr_file_filters;
556};
557
558struct perf_addr_filter_range {
559 unsigned long start;
560 unsigned long size;
561};
562
563
564
565
566enum perf_event_state {
567 PERF_EVENT_STATE_DEAD = -4,
568 PERF_EVENT_STATE_EXIT = -3,
569 PERF_EVENT_STATE_ERROR = -2,
570 PERF_EVENT_STATE_OFF = -1,
571 PERF_EVENT_STATE_INACTIVE = 0,
572 PERF_EVENT_STATE_ACTIVE = 1,
573};
574
575struct file;
576struct perf_sample_data;
577
578typedef void (*perf_overflow_handler_t)(struct perf_event *,
579 struct perf_sample_data *,
580 struct pt_regs *regs);
581
582
583
584
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591
592#define PERF_EV_CAP_SOFTWARE BIT(0)
593#define PERF_EV_CAP_READ_ACTIVE_PKG BIT(1)
594#define PERF_EV_CAP_SIBLING BIT(2)
595
596#define SWEVENT_HLIST_BITS 8
597#define SWEVENT_HLIST_SIZE (1 << SWEVENT_HLIST_BITS)
598
599struct swevent_hlist {
600 struct hlist_head heads[SWEVENT_HLIST_SIZE];
601 struct rcu_head rcu_head;
602};
603
604#define PERF_ATTACH_CONTEXT 0x01
605#define PERF_ATTACH_GROUP 0x02
606#define PERF_ATTACH_TASK 0x04
607#define PERF_ATTACH_TASK_DATA 0x08
608#define PERF_ATTACH_ITRACE 0x10
609
610struct perf_cgroup;
611struct perf_buffer;
612
613struct pmu_event_list {
614 raw_spinlock_t lock;
615 struct list_head list;
616};
617
618#define for_each_sibling_event(sibling, event) \
619 if ((event)->group_leader == (event)) \
620 list_for_each_entry((sibling), &(event)->sibling_list, sibling_list)
621
622
623
624
625struct perf_event {
626#ifdef CONFIG_PERF_EVENTS
627
628
629
630
631
632 struct list_head event_entry;
633
634
635
636
637
638 struct list_head sibling_list;
639 struct list_head active_list;
640
641
642
643 struct rb_node group_node;
644 u64 group_index;
645
646
647
648
649
650 struct list_head migrate_entry;
651
652 struct hlist_node hlist_entry;
653 struct list_head active_entry;
654 int nr_siblings;
655
656
657 int event_caps;
658
659 int group_caps;
660
661 struct perf_event *group_leader;
662 struct pmu *pmu;
663 void *pmu_private;
664
665 enum perf_event_state state;
666 unsigned int attach_state;
667 local64_t count;
668 atomic64_t child_count;
669
670
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673
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675
676 u64 total_time_enabled;
677 u64 total_time_running;
678 u64 tstamp;
679
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686
687
688 u64 shadow_ctx_time;
689
690 struct perf_event_attr attr;
691 u16 header_size;
692 u16 id_header_size;
693 u16 read_size;
694 struct hw_perf_event hw;
695
696 struct perf_event_context *ctx;
697 atomic_long_t refcount;
698
699
700
701
702
703 atomic64_t child_total_time_enabled;
704 atomic64_t child_total_time_running;
705
706
707
708
709 struct mutex child_mutex;
710 struct list_head child_list;
711 struct perf_event *parent;
712
713 int oncpu;
714 int cpu;
715
716 struct list_head owner_entry;
717 struct task_struct *owner;
718
719
720 struct mutex mmap_mutex;
721 atomic_t mmap_count;
722
723 struct perf_buffer *rb;
724 struct list_head rb_entry;
725 unsigned long rcu_batches;
726 int rcu_pending;
727
728
729 wait_queue_head_t waitq;
730 struct fasync_struct *fasync;
731
732
733 int pending_wakeup;
734 int pending_kill;
735 int pending_disable;
736 struct irq_work pending;
737
738 atomic_t event_limit;
739
740
741 struct perf_addr_filters_head addr_filters;
742
743 struct perf_addr_filter_range *addr_filter_ranges;
744 unsigned long addr_filters_gen;
745
746
747 struct perf_event *aux_event;
748
749 void (*destroy)(struct perf_event *);
750 struct rcu_head rcu_head;
751
752 struct pid_namespace *ns;
753 u64 id;
754
755 u64 (*clock)(void);
756 perf_overflow_handler_t overflow_handler;
757 void *overflow_handler_context;
758#ifdef CONFIG_BPF_SYSCALL
759 perf_overflow_handler_t orig_overflow_handler;
760 struct bpf_prog *prog;
761#endif
762
763#ifdef CONFIG_EVENT_TRACING
764 struct trace_event_call *tp_event;
765 struct event_filter *filter;
766#ifdef CONFIG_FUNCTION_TRACER
767 struct ftrace_ops ftrace_ops;
768#endif
769#endif
770
771#ifdef CONFIG_CGROUP_PERF
772 struct perf_cgroup *cgrp;
773#endif
774
775#ifdef CONFIG_SECURITY
776 void *security;
777#endif
778 struct list_head sb_list;
779#endif
780};
781
782
783struct perf_event_groups {
784 struct rb_root tree;
785 u64 index;
786};
787
788
789
790
791
792
793struct perf_event_context {
794 struct pmu *pmu;
795
796
797
798
799 raw_spinlock_t lock;
800
801
802
803
804
805 struct mutex mutex;
806
807 struct list_head active_ctx_list;
808 struct perf_event_groups pinned_groups;
809 struct perf_event_groups flexible_groups;
810 struct list_head event_list;
811
812 struct list_head pinned_active;
813 struct list_head flexible_active;
814
815 int nr_events;
816 int nr_active;
817 int is_active;
818 int nr_stat;
819 int nr_freq;
820 int rotate_disable;
821
822
823
824
825 int rotate_necessary;
826 refcount_t refcount;
827 struct task_struct *task;
828
829
830
831
832 u64 time;
833 u64 timestamp;
834
835
836
837
838
839 struct perf_event_context *parent_ctx;
840 u64 parent_gen;
841 u64 generation;
842 int pin_count;
843#ifdef CONFIG_CGROUP_PERF
844 int nr_cgroups;
845#endif
846 void *task_ctx_data;
847 struct rcu_head rcu_head;
848};
849
850
851
852
853
854#define PERF_NR_CONTEXTS 4
855
856
857
858
859struct perf_cpu_context {
860 struct perf_event_context ctx;
861 struct perf_event_context *task_ctx;
862 int active_oncpu;
863 int exclusive;
864
865 raw_spinlock_t hrtimer_lock;
866 struct hrtimer hrtimer;
867 ktime_t hrtimer_interval;
868 unsigned int hrtimer_active;
869
870#ifdef CONFIG_CGROUP_PERF
871 struct perf_cgroup *cgrp;
872 struct list_head cgrp_cpuctx_entry;
873#endif
874
875 int sched_cb_usage;
876
877 int online;
878
879
880
881
882 int heap_size;
883 struct perf_event **heap;
884 struct perf_event *heap_default[2];
885};
886
887struct perf_output_handle {
888 struct perf_event *event;
889 struct perf_buffer *rb;
890 unsigned long wakeup;
891 unsigned long size;
892 u64 aux_flags;
893 union {
894 void *addr;
895 unsigned long head;
896 };
897 int page;
898};
899
900struct bpf_perf_event_data_kern {
901 bpf_user_pt_regs_t *regs;
902 struct perf_sample_data *data;
903 struct perf_event *event;
904};
905
906#ifdef CONFIG_CGROUP_PERF
907
908
909
910
911
912struct perf_cgroup_info {
913 u64 time;
914 u64 timestamp;
915};
916
917struct perf_cgroup {
918 struct cgroup_subsys_state css;
919 struct perf_cgroup_info __percpu *info;
920};
921
922
923
924
925
926
927static inline struct perf_cgroup *
928perf_cgroup_from_task(struct task_struct *task, struct perf_event_context *ctx)
929{
930 return container_of(task_css_check(task, perf_event_cgrp_id,
931 ctx ? lockdep_is_held(&ctx->lock)
932 : true),
933 struct perf_cgroup, css);
934}
935#endif
936
937#ifdef CONFIG_PERF_EVENTS
938
939extern void *perf_aux_output_begin(struct perf_output_handle *handle,
940 struct perf_event *event);
941extern void perf_aux_output_end(struct perf_output_handle *handle,
942 unsigned long size);
943extern int perf_aux_output_skip(struct perf_output_handle *handle,
944 unsigned long size);
945extern void *perf_get_aux(struct perf_output_handle *handle);
946extern void perf_aux_output_flag(struct perf_output_handle *handle, u64 flags);
947extern void perf_event_itrace_started(struct perf_event *event);
948
949extern int perf_pmu_register(struct pmu *pmu, const char *name, int type);
950extern void perf_pmu_unregister(struct pmu *pmu);
951
952extern int perf_num_counters(void);
953extern const char *perf_pmu_name(void);
954extern void __perf_event_task_sched_in(struct task_struct *prev,
955 struct task_struct *task);
956extern void __perf_event_task_sched_out(struct task_struct *prev,
957 struct task_struct *next);
958extern int perf_event_init_task(struct task_struct *child);
959extern void perf_event_exit_task(struct task_struct *child);
960extern void perf_event_free_task(struct task_struct *task);
961extern void perf_event_delayed_put(struct task_struct *task);
962extern struct file *perf_event_get(unsigned int fd);
963extern const struct perf_event *perf_get_event(struct file *file);
964extern const struct perf_event_attr *perf_event_attrs(struct perf_event *event);
965extern void perf_event_print_debug(void);
966extern void perf_pmu_disable(struct pmu *pmu);
967extern void perf_pmu_enable(struct pmu *pmu);
968extern void perf_sched_cb_dec(struct pmu *pmu);
969extern void perf_sched_cb_inc(struct pmu *pmu);
970extern int perf_event_task_disable(void);
971extern int perf_event_task_enable(void);
972
973extern void perf_pmu_resched(struct pmu *pmu);
974
975extern int perf_event_refresh(struct perf_event *event, int refresh);
976extern void perf_event_update_userpage(struct perf_event *event);
977extern int perf_event_release_kernel(struct perf_event *event);
978extern struct perf_event *
979perf_event_create_kernel_counter(struct perf_event_attr *attr,
980 int cpu,
981 struct task_struct *task,
982 perf_overflow_handler_t callback,
983 void *context);
984extern void perf_pmu_migrate_context(struct pmu *pmu,
985 int src_cpu, int dst_cpu);
986int perf_event_read_local(struct perf_event *event, u64 *value,
987 u64 *enabled, u64 *running);
988extern u64 perf_event_read_value(struct perf_event *event,
989 u64 *enabled, u64 *running);
990
991
992struct perf_sample_data {
993
994
995
996
997 u64 addr;
998 struct perf_raw_record *raw;
999 struct perf_branch_stack *br_stack;
1000 u64 period;
1001 u64 weight;
1002 u64 txn;
1003 union perf_mem_data_src data_src;
1004
1005
1006
1007
1008
1009 u64 type;
1010 u64 ip;
1011 struct {
1012 u32 pid;
1013 u32 tid;
1014 } tid_entry;
1015 u64 time;
1016 u64 id;
1017 u64 stream_id;
1018 struct {
1019 u32 cpu;
1020 u32 reserved;
1021 } cpu_entry;
1022 struct perf_callchain_entry *callchain;
1023 u64 aux_size;
1024
1025 struct perf_regs regs_user;
1026 struct perf_regs regs_intr;
1027 u64 stack_user_size;
1028
1029 u64 phys_addr;
1030 u64 cgroup;
1031} ____cacheline_aligned;
1032
1033
1034#define PERF_MEM_NA (PERF_MEM_S(OP, NA) |\
1035 PERF_MEM_S(LVL, NA) |\
1036 PERF_MEM_S(SNOOP, NA) |\
1037 PERF_MEM_S(LOCK, NA) |\
1038 PERF_MEM_S(TLB, NA))
1039
1040static inline void perf_sample_data_init(struct perf_sample_data *data,
1041 u64 addr, u64 period)
1042{
1043
1044 data->addr = addr;
1045 data->raw = NULL;
1046 data->br_stack = NULL;
1047 data->period = period;
1048 data->weight = 0;
1049 data->data_src.val = PERF_MEM_NA;
1050 data->txn = 0;
1051}
1052
1053extern void perf_output_sample(struct perf_output_handle *handle,
1054 struct perf_event_header *header,
1055 struct perf_sample_data *data,
1056 struct perf_event *event);
1057extern void perf_prepare_sample(struct perf_event_header *header,
1058 struct perf_sample_data *data,
1059 struct perf_event *event,
1060 struct pt_regs *regs);
1061
1062extern int perf_event_overflow(struct perf_event *event,
1063 struct perf_sample_data *data,
1064 struct pt_regs *regs);
1065
1066extern void perf_event_output_forward(struct perf_event *event,
1067 struct perf_sample_data *data,
1068 struct pt_regs *regs);
1069extern void perf_event_output_backward(struct perf_event *event,
1070 struct perf_sample_data *data,
1071 struct pt_regs *regs);
1072extern int perf_event_output(struct perf_event *event,
1073 struct perf_sample_data *data,
1074 struct pt_regs *regs);
1075
1076static inline bool
1077is_default_overflow_handler(struct perf_event *event)
1078{
1079 if (likely(event->overflow_handler == perf_event_output_forward))
1080 return true;
1081 if (unlikely(event->overflow_handler == perf_event_output_backward))
1082 return true;
1083 return false;
1084}
1085
1086extern void
1087perf_event_header__init_id(struct perf_event_header *header,
1088 struct perf_sample_data *data,
1089 struct perf_event *event);
1090extern void
1091perf_event__output_id_sample(struct perf_event *event,
1092 struct perf_output_handle *handle,
1093 struct perf_sample_data *sample);
1094
1095extern void
1096perf_log_lost_samples(struct perf_event *event, u64 lost);
1097
1098static inline bool event_has_any_exclude_flag(struct perf_event *event)
1099{
1100 struct perf_event_attr *attr = &event->attr;
1101
1102 return attr->exclude_idle || attr->exclude_user ||
1103 attr->exclude_kernel || attr->exclude_hv ||
1104 attr->exclude_guest || attr->exclude_host;
1105}
1106
1107static inline bool is_sampling_event(struct perf_event *event)
1108{
1109 return event->attr.sample_period != 0;
1110}
1111
1112
1113
1114
1115static inline int is_software_event(struct perf_event *event)
1116{
1117 return event->event_caps & PERF_EV_CAP_SOFTWARE;
1118}
1119
1120
1121
1122
1123static inline int in_software_context(struct perf_event *event)
1124{
1125 return event->ctx->pmu->task_ctx_nr == perf_sw_context;
1126}
1127
1128static inline int is_exclusive_pmu(struct pmu *pmu)
1129{
1130 return pmu->capabilities & PERF_PMU_CAP_EXCLUSIVE;
1131}
1132
1133extern struct static_key perf_swevent_enabled[PERF_COUNT_SW_MAX];
1134
1135extern void ___perf_sw_event(u32, u64, struct pt_regs *, u64);
1136extern void __perf_sw_event(u32, u64, struct pt_regs *, u64);
1137
1138#ifndef perf_arch_fetch_caller_regs
1139static inline void perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip) { }
1140#endif
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156static inline void perf_fetch_caller_regs(struct pt_regs *regs)
1157{
1158 perf_arch_fetch_caller_regs(regs, CALLER_ADDR0);
1159}
1160
1161static __always_inline void
1162perf_sw_event(u32 event_id, u64 nr, struct pt_regs *regs, u64 addr)
1163{
1164 if (static_key_false(&perf_swevent_enabled[event_id]))
1165 __perf_sw_event(event_id, nr, regs, addr);
1166}
1167
1168DECLARE_PER_CPU(struct pt_regs, __perf_regs[4]);
1169
1170
1171
1172
1173
1174
1175static __always_inline void
1176perf_sw_event_sched(u32 event_id, u64 nr, u64 addr)
1177{
1178 if (static_key_false(&perf_swevent_enabled[event_id])) {
1179 struct pt_regs *regs = this_cpu_ptr(&__perf_regs[0]);
1180
1181 perf_fetch_caller_regs(regs);
1182 ___perf_sw_event(event_id, nr, regs, addr);
1183 }
1184}
1185
1186extern struct static_key_false perf_sched_events;
1187
1188static __always_inline bool
1189perf_sw_migrate_enabled(void)
1190{
1191 if (static_key_false(&perf_swevent_enabled[PERF_COUNT_SW_CPU_MIGRATIONS]))
1192 return true;
1193 return false;
1194}
1195
1196static inline void perf_event_task_migrate(struct task_struct *task)
1197{
1198 if (perf_sw_migrate_enabled())
1199 task->sched_migrated = 1;
1200}
1201
1202static inline void perf_event_task_sched_in(struct task_struct *prev,
1203 struct task_struct *task)
1204{
1205 if (static_branch_unlikely(&perf_sched_events))
1206 __perf_event_task_sched_in(prev, task);
1207
1208 if (perf_sw_migrate_enabled() && task->sched_migrated) {
1209 struct pt_regs *regs = this_cpu_ptr(&__perf_regs[0]);
1210
1211 perf_fetch_caller_regs(regs);
1212 ___perf_sw_event(PERF_COUNT_SW_CPU_MIGRATIONS, 1, regs, 0);
1213 task->sched_migrated = 0;
1214 }
1215}
1216
1217static inline void perf_event_task_sched_out(struct task_struct *prev,
1218 struct task_struct *next)
1219{
1220 perf_sw_event_sched(PERF_COUNT_SW_CONTEXT_SWITCHES, 1, 0);
1221
1222 if (static_branch_unlikely(&perf_sched_events))
1223 __perf_event_task_sched_out(prev, next);
1224}
1225
1226extern void perf_event_mmap(struct vm_area_struct *vma);
1227
1228extern void perf_event_ksymbol(u16 ksym_type, u64 addr, u32 len,
1229 bool unregister, const char *sym);
1230extern void perf_event_bpf_event(struct bpf_prog *prog,
1231 enum perf_bpf_event_type type,
1232 u16 flags);
1233
1234extern struct perf_guest_info_callbacks *perf_guest_cbs;
1235extern int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
1236extern int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
1237
1238extern void perf_event_exec(void);
1239extern void perf_event_comm(struct task_struct *tsk, bool exec);
1240extern void perf_event_namespaces(struct task_struct *tsk);
1241extern void perf_event_fork(struct task_struct *tsk);
1242extern void perf_event_text_poke(const void *addr,
1243 const void *old_bytes, size_t old_len,
1244 const void *new_bytes, size_t new_len);
1245
1246
1247DECLARE_PER_CPU(struct perf_callchain_entry, perf_callchain_entry);
1248
1249extern void perf_callchain_user(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs);
1250extern void perf_callchain_kernel(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs);
1251extern struct perf_callchain_entry *
1252get_perf_callchain(struct pt_regs *regs, u32 init_nr, bool kernel, bool user,
1253 u32 max_stack, bool crosstask, bool add_mark);
1254extern struct perf_callchain_entry *perf_callchain(struct perf_event *event, struct pt_regs *regs);
1255extern int get_callchain_buffers(int max_stack);
1256extern void put_callchain_buffers(void);
1257extern struct perf_callchain_entry *get_callchain_entry(int *rctx);
1258extern void put_callchain_entry(int rctx);
1259
1260extern int sysctl_perf_event_max_stack;
1261extern int sysctl_perf_event_max_contexts_per_stack;
1262
1263static inline int perf_callchain_store_context(struct perf_callchain_entry_ctx *ctx, u64 ip)
1264{
1265 if (ctx->contexts < sysctl_perf_event_max_contexts_per_stack) {
1266 struct perf_callchain_entry *entry = ctx->entry;
1267 entry->ip[entry->nr++] = ip;
1268 ++ctx->contexts;
1269 return 0;
1270 } else {
1271 ctx->contexts_maxed = true;
1272 return -1;
1273 }
1274}
1275
1276static inline int perf_callchain_store(struct perf_callchain_entry_ctx *ctx, u64 ip)
1277{
1278 if (ctx->nr < ctx->max_stack && !ctx->contexts_maxed) {
1279 struct perf_callchain_entry *entry = ctx->entry;
1280 entry->ip[entry->nr++] = ip;
1281 ++ctx->nr;
1282 return 0;
1283 } else {
1284 return -1;
1285 }
1286}
1287
1288extern int sysctl_perf_event_paranoid;
1289extern int sysctl_perf_event_mlock;
1290extern int sysctl_perf_event_sample_rate;
1291extern int sysctl_perf_cpu_time_max_percent;
1292
1293extern void perf_sample_event_took(u64 sample_len_ns);
1294
1295int perf_proc_update_handler(struct ctl_table *table, int write,
1296 void *buffer, size_t *lenp, loff_t *ppos);
1297int perf_cpu_time_max_percent_handler(struct ctl_table *table, int write,
1298 void *buffer, size_t *lenp, loff_t *ppos);
1299int perf_event_max_stack_handler(struct ctl_table *table, int write,
1300 void *buffer, size_t *lenp, loff_t *ppos);
1301
1302
1303#define PERF_SECURITY_OPEN 0
1304
1305
1306#define PERF_SECURITY_CPU 1
1307#define PERF_SECURITY_KERNEL 2
1308#define PERF_SECURITY_TRACEPOINT 3
1309
1310static inline int perf_is_paranoid(void)
1311{
1312 return sysctl_perf_event_paranoid > -1;
1313}
1314
1315static inline int perf_allow_kernel(struct perf_event_attr *attr)
1316{
1317 if (sysctl_perf_event_paranoid > 1 && !perfmon_capable())
1318 return -EACCES;
1319
1320 return security_perf_event_open(attr, PERF_SECURITY_KERNEL);
1321}
1322
1323static inline int perf_allow_cpu(struct perf_event_attr *attr)
1324{
1325 if (sysctl_perf_event_paranoid > 0 && !perfmon_capable())
1326 return -EACCES;
1327
1328 return security_perf_event_open(attr, PERF_SECURITY_CPU);
1329}
1330
1331static inline int perf_allow_tracepoint(struct perf_event_attr *attr)
1332{
1333 if (sysctl_perf_event_paranoid > -1 && !perfmon_capable())
1334 return -EPERM;
1335
1336 return security_perf_event_open(attr, PERF_SECURITY_TRACEPOINT);
1337}
1338
1339extern void perf_event_init(void);
1340extern void perf_tp_event(u16 event_type, u64 count, void *record,
1341 int entry_size, struct pt_regs *regs,
1342 struct hlist_head *head, int rctx,
1343 struct task_struct *task);
1344extern void perf_bp_event(struct perf_event *event, void *data);
1345
1346#ifndef perf_misc_flags
1347# define perf_misc_flags(regs) \
1348 (user_mode(regs) ? PERF_RECORD_MISC_USER : PERF_RECORD_MISC_KERNEL)
1349# define perf_instruction_pointer(regs) instruction_pointer(regs)
1350#endif
1351#ifndef perf_arch_bpf_user_pt_regs
1352# define perf_arch_bpf_user_pt_regs(regs) regs
1353#endif
1354
1355static inline bool has_branch_stack(struct perf_event *event)
1356{
1357 return event->attr.sample_type & PERF_SAMPLE_BRANCH_STACK;
1358}
1359
1360static inline bool needs_branch_stack(struct perf_event *event)
1361{
1362 return event->attr.branch_sample_type != 0;
1363}
1364
1365static inline bool has_aux(struct perf_event *event)
1366{
1367 return event->pmu->setup_aux;
1368}
1369
1370static inline bool is_write_backward(struct perf_event *event)
1371{
1372 return !!event->attr.write_backward;
1373}
1374
1375static inline bool has_addr_filter(struct perf_event *event)
1376{
1377 return event->pmu->nr_addr_filters;
1378}
1379
1380
1381
1382
1383static inline struct perf_addr_filters_head *
1384perf_event_addr_filters(struct perf_event *event)
1385{
1386 struct perf_addr_filters_head *ifh = &event->addr_filters;
1387
1388 if (event->parent)
1389 ifh = &event->parent->addr_filters;
1390
1391 return ifh;
1392}
1393
1394extern void perf_event_addr_filters_sync(struct perf_event *event);
1395
1396extern int perf_output_begin(struct perf_output_handle *handle,
1397 struct perf_sample_data *data,
1398 struct perf_event *event, unsigned int size);
1399extern int perf_output_begin_forward(struct perf_output_handle *handle,
1400 struct perf_sample_data *data,
1401 struct perf_event *event,
1402 unsigned int size);
1403extern int perf_output_begin_backward(struct perf_output_handle *handle,
1404 struct perf_sample_data *data,
1405 struct perf_event *event,
1406 unsigned int size);
1407
1408extern void perf_output_end(struct perf_output_handle *handle);
1409extern unsigned int perf_output_copy(struct perf_output_handle *handle,
1410 const void *buf, unsigned int len);
1411extern unsigned int perf_output_skip(struct perf_output_handle *handle,
1412 unsigned int len);
1413extern long perf_output_copy_aux(struct perf_output_handle *aux_handle,
1414 struct perf_output_handle *handle,
1415 unsigned long from, unsigned long to);
1416extern int perf_swevent_get_recursion_context(void);
1417extern void perf_swevent_put_recursion_context(int rctx);
1418extern u64 perf_swevent_set_period(struct perf_event *event);
1419extern void perf_event_enable(struct perf_event *event);
1420extern void perf_event_disable(struct perf_event *event);
1421extern void perf_event_disable_local(struct perf_event *event);
1422extern void perf_event_disable_inatomic(struct perf_event *event);
1423extern void perf_event_task_tick(void);
1424extern int perf_event_account_interrupt(struct perf_event *event);
1425extern int perf_event_period(struct perf_event *event, u64 value);
1426extern u64 perf_event_pause(struct perf_event *event, bool reset);
1427#else
1428static inline void *
1429perf_aux_output_begin(struct perf_output_handle *handle,
1430 struct perf_event *event) { return NULL; }
1431static inline void
1432perf_aux_output_end(struct perf_output_handle *handle, unsigned long size)
1433 { }
1434static inline int
1435perf_aux_output_skip(struct perf_output_handle *handle,
1436 unsigned long size) { return -EINVAL; }
1437static inline void *
1438perf_get_aux(struct perf_output_handle *handle) { return NULL; }
1439static inline void
1440perf_event_task_migrate(struct task_struct *task) { }
1441static inline void
1442perf_event_task_sched_in(struct task_struct *prev,
1443 struct task_struct *task) { }
1444static inline void
1445perf_event_task_sched_out(struct task_struct *prev,
1446 struct task_struct *next) { }
1447static inline int perf_event_init_task(struct task_struct *child) { return 0; }
1448static inline void perf_event_exit_task(struct task_struct *child) { }
1449static inline void perf_event_free_task(struct task_struct *task) { }
1450static inline void perf_event_delayed_put(struct task_struct *task) { }
1451static inline struct file *perf_event_get(unsigned int fd) { return ERR_PTR(-EINVAL); }
1452static inline const struct perf_event *perf_get_event(struct file *file)
1453{
1454 return ERR_PTR(-EINVAL);
1455}
1456static inline const struct perf_event_attr *perf_event_attrs(struct perf_event *event)
1457{
1458 return ERR_PTR(-EINVAL);
1459}
1460static inline int perf_event_read_local(struct perf_event *event, u64 *value,
1461 u64 *enabled, u64 *running)
1462{
1463 return -EINVAL;
1464}
1465static inline void perf_event_print_debug(void) { }
1466static inline int perf_event_task_disable(void) { return -EINVAL; }
1467static inline int perf_event_task_enable(void) { return -EINVAL; }
1468static inline int perf_event_refresh(struct perf_event *event, int refresh)
1469{
1470 return -EINVAL;
1471}
1472
1473static inline void
1474perf_sw_event(u32 event_id, u64 nr, struct pt_regs *regs, u64 addr) { }
1475static inline void
1476perf_sw_event_sched(u32 event_id, u64 nr, u64 addr) { }
1477static inline void
1478perf_bp_event(struct perf_event *event, void *data) { }
1479
1480static inline int perf_register_guest_info_callbacks
1481(struct perf_guest_info_callbacks *callbacks) { return 0; }
1482static inline int perf_unregister_guest_info_callbacks
1483(struct perf_guest_info_callbacks *callbacks) { return 0; }
1484
1485static inline void perf_event_mmap(struct vm_area_struct *vma) { }
1486
1487typedef int (perf_ksymbol_get_name_f)(char *name, int name_len, void *data);
1488static inline void perf_event_ksymbol(u16 ksym_type, u64 addr, u32 len,
1489 bool unregister, const char *sym) { }
1490static inline void perf_event_bpf_event(struct bpf_prog *prog,
1491 enum perf_bpf_event_type type,
1492 u16 flags) { }
1493static inline void perf_event_exec(void) { }
1494static inline void perf_event_comm(struct task_struct *tsk, bool exec) { }
1495static inline void perf_event_namespaces(struct task_struct *tsk) { }
1496static inline void perf_event_fork(struct task_struct *tsk) { }
1497static inline void perf_event_text_poke(const void *addr,
1498 const void *old_bytes,
1499 size_t old_len,
1500 const void *new_bytes,
1501 size_t new_len) { }
1502static inline void perf_event_init(void) { }
1503static inline int perf_swevent_get_recursion_context(void) { return -1; }
1504static inline void perf_swevent_put_recursion_context(int rctx) { }
1505static inline u64 perf_swevent_set_period(struct perf_event *event) { return 0; }
1506static inline void perf_event_enable(struct perf_event *event) { }
1507static inline void perf_event_disable(struct perf_event *event) { }
1508static inline int __perf_event_disable(void *info) { return -1; }
1509static inline void perf_event_task_tick(void) { }
1510static inline int perf_event_release_kernel(struct perf_event *event) { return 0; }
1511static inline int perf_event_period(struct perf_event *event, u64 value)
1512{
1513 return -EINVAL;
1514}
1515static inline u64 perf_event_pause(struct perf_event *event, bool reset)
1516{
1517 return 0;
1518}
1519#endif
1520
1521#if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_CPU_SUP_INTEL)
1522extern void perf_restore_debug_store(void);
1523#else
1524static inline void perf_restore_debug_store(void) { }
1525#endif
1526
1527static __always_inline bool perf_raw_frag_last(const struct perf_raw_frag *frag)
1528{
1529 return frag->pad < sizeof(u64);
1530}
1531
1532#define perf_output_put(handle, x) perf_output_copy((handle), &(x), sizeof(x))
1533
1534struct perf_pmu_events_attr {
1535 struct device_attribute attr;
1536 u64 id;
1537 const char *event_str;
1538};
1539
1540struct perf_pmu_events_ht_attr {
1541 struct device_attribute attr;
1542 u64 id;
1543 const char *event_str_ht;
1544 const char *event_str_noht;
1545};
1546
1547ssize_t perf_event_sysfs_show(struct device *dev, struct device_attribute *attr,
1548 char *page);
1549
1550#define PMU_EVENT_ATTR(_name, _var, _id, _show) \
1551static struct perf_pmu_events_attr _var = { \
1552 .attr = __ATTR(_name, 0444, _show, NULL), \
1553 .id = _id, \
1554};
1555
1556#define PMU_EVENT_ATTR_STRING(_name, _var, _str) \
1557static struct perf_pmu_events_attr _var = { \
1558 .attr = __ATTR(_name, 0444, perf_event_sysfs_show, NULL), \
1559 .id = 0, \
1560 .event_str = _str, \
1561};
1562
1563#define PMU_FORMAT_ATTR(_name, _format) \
1564static ssize_t \
1565_name##_show(struct device *dev, \
1566 struct device_attribute *attr, \
1567 char *page) \
1568{ \
1569 BUILD_BUG_ON(sizeof(_format) >= PAGE_SIZE); \
1570 return sprintf(page, _format "\n"); \
1571} \
1572 \
1573static struct device_attribute format_attr_##_name = __ATTR_RO(_name)
1574
1575
1576#ifdef CONFIG_PERF_EVENTS
1577int perf_event_init_cpu(unsigned int cpu);
1578int perf_event_exit_cpu(unsigned int cpu);
1579#else
1580#define perf_event_init_cpu NULL
1581#define perf_event_exit_cpu NULL
1582#endif
1583
1584extern void __weak arch_perf_update_userpage(struct perf_event *event,
1585 struct perf_event_mmap_page *userpg,
1586 u64 now);
1587
1588#endif
1589