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2023-12-11 6778948f9de86c3cfaf36725a7c87dcff9ba247f 
 kernel/include/linux/perf_event.h
....@@ -30,6 +30,7 @@
3030 	int				(*is_in_guest)(void);
3131 	int				(*is_user_mode)(void);
3232 	unsigned long			(*get_guest_ip)(void);
33
+	void				(*handle_intel_pt_intr)(void);
3334 };
3435 
3536 #ifdef CONFIG_HAVE_HW_BREAKPOINT
....@@ -53,14 +54,14 @@
5354 #include <linux/atomic.h>
5455 #include <linux/sysfs.h>
5556 #include <linux/perf_regs.h>
56
-#include <linux/workqueue.h>
5757 #include <linux/cgroup.h>
58
+#include <linux/refcount.h>
5859 #include <linux/security.h>
5960 #include <asm/local.h>
6061 
6162 struct perf_callchain_entry {
6263 	__u64				nr;
63
-	__u64				ip[0]; /* /proc/sys/kernel/perf_event_max_stack */
64
+	__u64				ip[]; /* /proc/sys/kernel/perf_event_max_stack */
6465 };
6566 
6667 struct perf_callchain_entry_ctx {
....@@ -92,15 +93,27 @@
9293 /*
9394  * branch stack layout:
9495  *  nr: number of taken branches stored in entries[]
96
+ *  hw_idx: The low level index of raw branch records
97
+ *          for the most recent branch.
98
+ *          -1ULL means invalid/unknown.
9599  *
96100  * Note that nr can vary from sample to sample
97101  * branches (to, from) are stored from most recent
98102  * to least recent, i.e., entries[0] contains the most
99103  * recent branch.
104
+ * The entries[] is an abstraction of raw branch records,
105
+ * which may not be stored in age order in HW, e.g. Intel LBR.
106
+ * The hw_idx is to expose the low level index of raw
107
+ * branch record for the most recent branch aka entries[0].
108
+ * The hw_idx index is between -1 (unknown) and max depth,
109
+ * which can be retrieved in /sys/devices/cpu/caps/branches.
110
+ * For the architectures whose raw branch records are
111
+ * already stored in age order, the hw_idx should be 0.
100112  */
101113 struct perf_branch_stack {
102114 	__u64				nr;
103
-	struct perf_branch_entry	entries[0];
115
+	__u64				hw_idx;
116
+	struct perf_branch_entry	entries[];
104117 };
105118 
106119 struct task_struct;
....@@ -199,17 +212,26 @@
199212 	 */
200213 	u64				sample_period;
201214 
202
-	/*
203
-	 * The period we started this sample with.
204
-	 */
205
-	u64				last_period;
215
+	union {
216
+		struct { /* Sampling */
217
+			/*
218
+			 * The period we started this sample with.
219
+			 */
220
+			u64				last_period;
206221 
207
-	/*
208
-	 * However much is left of the current period; note that this is
209
-	 * a full 64bit value and allows for generation of periods longer
210
-	 * than hardware might allow.
211
-	 */
212
-	local64_t			period_left;
222
+			/*
223
+			 * However much is left of the current period;
224
+			 * note that this is a full 64bit value and
225
+			 * allows for generation of periods longer
226
+			 * than hardware might allow.
227
+			 */
228
+			local64_t			period_left;
229
+		};
230
+		struct { /* Topdown events counting for context switch */
231
+			u64				saved_metric;
232
+			u64				saved_slots;
233
+		};
234
+	};
213235 
214236 	/*
215237 	 * State for throttling the event, see __perf_event_overflow() and
....@@ -241,10 +263,14 @@
241263 #define PERF_PMU_CAP_NO_INTERRUPT		0x01
242264 #define PERF_PMU_CAP_NO_NMI			0x02
243265 #define PERF_PMU_CAP_AUX_NO_SG			0x04
244
-#define PERF_PMU_CAP_AUX_SW_DOUBLEBUF		0x08
266
+#define PERF_PMU_CAP_EXTENDED_REGS		0x08
245267 #define PERF_PMU_CAP_EXCLUSIVE			0x10
246268 #define PERF_PMU_CAP_ITRACE			0x20
247269 #define PERF_PMU_CAP_HETEROGENEOUS_CPUS		0x40
270
+#define PERF_PMU_CAP_NO_EXCLUDE			0x80
271
+#define PERF_PMU_CAP_AUX_OUTPUT			0x100
272
+
273
+struct perf_output_handle;
248274 
249275 /**
250276  * struct pmu - generic performance monitoring unit
....@@ -255,6 +281,7 @@
255281 	struct module			*module;
256282 	struct device			*dev;
257283 	const struct attribute_group	**attr_groups;
284
+	const struct attribute_group	**attr_update;
258285 	const char			*name;
259286 	int				type;
260287 
....@@ -263,13 +290,11 @@
263290 	 */
264291 	int				capabilities;
265292 
266
-	int * __percpu			pmu_disable_count;
267
-	struct perf_cpu_context * __percpu pmu_cpu_context;
293
+	int __percpu			*pmu_disable_count;
294
+	struct perf_cpu_context __percpu *pmu_cpu_context;
268295 	atomic_t			exclusive_cnt; /* < 0: cpu; > 0: tsk */
269296 	int				task_ctx_nr;
270297 	int				hrtimer_interval_ms;
271
-	u32				events_across_hotplug:1,
272
-					reserved:31;
273298 
274299 	/* number of address filters this PMU can do */
275300 	unsigned int			nr_addr_filters;
....@@ -291,7 +316,7 @@
291316 	 *  -EBUSY	-- @event is for this PMU but PMU temporarily unavailable
292317 	 *  -EINVAL	-- @event is for this PMU but @event is not valid
293318 	 *  -EOPNOTSUPP -- @event is for this PMU, @event is valid, but not supported
294
-	 *  -EACCESS	-- @event is for this PMU, @event is valid, but no privilidges
319
+	 *  -EACCES	-- @event is for this PMU, @event is valid, but no privileges
295320 	 *
296321 	 *  0		-- @event is for this PMU and valid
297322 	 *
....@@ -350,7 +375,7 @@
350375 	 * ->stop() with PERF_EF_UPDATE will read the counter and update
351376 	 *  period/count values like ->read() would.
352377 	 *
353
-	 * ->start() with PERF_EF_RELOAD will reprogram the the counter
378
+	 * ->start() with PERF_EF_RELOAD will reprogram the counter
354379 	 *  value, must be preceded by a ->stop() with PERF_EF_UPDATE.
355380 	 */
356381 	void (*start)			(struct perf_event *event, int flags);
....@@ -403,11 +428,21 @@
403428 	 */
404429 	void (*sched_task)		(struct perf_event_context *ctx,
405430 					bool sched_in);
406
-	/*
407
-	 * PMU specific data size
408
-	 */
409
-	size_t				task_ctx_size;
410431 
432
+	/*
433
+	 * Kmem cache of PMU specific data
434
+	 */
435
+	struct kmem_cache		*task_ctx_cache;
436
+
437
+	/*
438
+	 * PMU specific parts of task perf event context (i.e. ctx->task_ctx_data)
439
+	 * can be synchronized using this function. See Intel LBR callstack support
440
+	 * implementation and Perf core context switch handling callbacks for usage
441
+	 * examples.
442
+	 */
443
+	void (*swap_task_ctx)		(struct perf_event_context *prev,
444
+					 struct perf_event_context *next);
445
+					/* optional */
411446 
412447 	/*
413448 	 * Set up pmu-private data structures for an AUX area
....@@ -420,6 +455,19 @@
420455 	 * Free pmu-private AUX data structures
421456 	 */
422457 	void (*free_aux)		(void *aux); /* optional */
458
+
459
+	/*
460
+	 * Take a snapshot of the AUX buffer without touching the event
461
+	 * state, so that preempting ->start()/->stop() callbacks does
462
+	 * not interfere with their logic. Called in PMI context.
463
+	 *
464
+	 * Returns the size of AUX data copied to the output handle.
465
+	 *
466
+	 * Optional.
467
+	 */
468
+	long (*snapshot_aux)		(struct perf_event *event,
469
+					 struct perf_output_handle *handle,
470
+					 unsigned long size);
423471 
424472 	/*
425473 	 * Validate address range filters: make sure the HW supports the
....@@ -447,6 +495,16 @@
447495 					/* optional */
448496 
449497 	/*
498
+	 * Check if event can be used for aux_output purposes for
499
+	 * events of this PMU.
500
+	 *
501
+	 * Runs from perf_event_open(). Should return 0 for "no match"
502
+	 * or non-zero for "match".
503
+	 */
504
+	int (*aux_output_match)		(struct perf_event *event);
505
+					/* optional */
506
+
507
+	/*
450508 	 * Filter events for PMU-specific reasons.
451509 	 */
452510 	int (*filter_match)		(struct perf_event *event); /* optional */
....@@ -466,7 +524,7 @@
466524 /**
467525  * struct perf_addr_filter - address range filter definition
468526  * @entry:	event's filter list linkage
469
- * @inode:	object file's inode for file-based filters
527
+ * @path:	object file's path for file-based filters
470528  * @offset:	filter range offset
471529  * @size:	filter range size (size==0 means single address trigger)
472530  * @action:	filter/start/stop
....@@ -506,7 +564,6 @@
506564  * enum perf_event_state - the states of an event:
507565  */
508566 enum perf_event_state {
509
-	PERF_EVENT_STATE_DORMANT	= -5,
510567 	PERF_EVENT_STATE_DEAD		= -4,
511568 	PERF_EVENT_STATE_EXIT		= -3,
512569 	PERF_EVENT_STATE_ERROR		= -2,
....@@ -528,9 +585,13 @@
528585  * PERF_EV_CAP_SOFTWARE: Is a software event.
529586  * PERF_EV_CAP_READ_ACTIVE_PKG: A CPU event (or cgroup event) that can be read
530587  * from any CPU in the package where it is active.
588
+ * PERF_EV_CAP_SIBLING: An event with this flag must be a group sibling and
589
+ * cannot be a group leader. If an event with this flag is detached from the
590
+ * group it is scheduled out and moved into an unrecoverable ERROR state.
531591  */
532592 #define PERF_EV_CAP_SOFTWARE		BIT(0)
533593 #define PERF_EV_CAP_READ_ACTIVE_PKG	BIT(1)
594
+#define PERF_EV_CAP_SIBLING		BIT(2)
534595 
535596 #define SWEVENT_HLIST_BITS		8
536597 #define SWEVENT_HLIST_SIZE		(1 << SWEVENT_HLIST_BITS)
....@@ -545,9 +606,10 @@
545606 #define PERF_ATTACH_TASK	0x04
546607 #define PERF_ATTACH_TASK_DATA	0x08
547608 #define PERF_ATTACH_ITRACE	0x10
609
+#define PERF_ATTACH_SCHED_CB	0x20
548610 
549611 struct perf_cgroup;
550
-struct ring_buffer;
612
+struct perf_buffer;
551613 
552614 struct pmu_event_list {
553615 	raw_spinlock_t		lock;
....@@ -619,7 +681,9 @@
619681 	/*
620682 	 * timestamp shadows the actual context timing but it can
621683 	 * be safely used in NMI interrupt context. It reflects the
622
-	 * context time as it was when the event was last scheduled in.
684
+	 * context time as it was when the event was last scheduled in,
685
+	 * or when ctx_sched_in failed to schedule the event because we
686
+	 * run out of PMC.
623687 	 *
624688 	 * ctx_time already accounts for ctx->timestamp. Therefore to
625689 	 * compute ctx_time for a sample, simply add perf_clock().
....@@ -651,7 +715,6 @@
651715 
652716 	int				oncpu;
653717 	int				cpu;
654
-	cpumask_t			readable_on_cpus;
655718 
656719 	struct list_head		owner_entry;
657720 	struct task_struct		*owner;
....@@ -660,7 +723,7 @@
660723 	struct mutex			mmap_mutex;
661724 	atomic_t			mmap_count;
662725 
663
-	struct ring_buffer		*rb;
726
+	struct perf_buffer		*rb;
664727 	struct list_head		rb_entry;
665728 	unsigned long			rcu_batches;
666729 	int				rcu_pending;
....@@ -682,6 +745,9 @@
682745 	/* vma address array for file-based filders */
683746 	struct perf_addr_filter_range	*addr_filter_ranges;
684747 	unsigned long			addr_filters_gen;
748
+
749
+	/* for aux_output events */
750
+	struct perf_event		*aux_event;
685751 
686752 	void (*destroy)(struct perf_event *);
687753 	struct rcu_head			rcu_head;
....@@ -713,12 +779,6 @@
713779 	void *security;
714780 #endif
715781 	struct list_head		sb_list;
716
-	/* Is this event shared with other events */
717
-	bool				shared;
718
-
719
-	/* TODO: need to cherry-pick 3d3eb5fb85d97. This is just padding for now
720
-	 * to reduce the ABI diff */
721
-	struct list_head		dormant_event_entry;
722782 #endif /* CONFIG_PERF_EVENTS */
723783 };
724784 
....@@ -761,7 +821,12 @@
761821 	int				nr_stat;
762822 	int				nr_freq;
763823 	int				rotate_disable;
764
-	atomic_t			refcount;
824
+	/*
825
+	 * Set when nr_events != nr_active, except tolerant to events not
826
+	 * necessary to be active due to scheduling constraints, such as cgroups.
827
+	 */
828
+	int				rotate_necessary;
829
+	refcount_t			refcount;
765830 	struct task_struct		*task;
766831 
767832 	/*
....@@ -814,11 +879,18 @@
814879 	int				sched_cb_usage;
815880 
816881 	int				online;
882
+	/*
883
+	 * Per-CPU storage for iterators used in visit_groups_merge. The default
884
+	 * storage is of size 2 to hold the CPU and any CPU event iterators.
885
+	 */
886
+	int				heap_size;
887
+	struct perf_event		**heap;
888
+	struct perf_event		*heap_default[2];
817889 };
818890 
819891 struct perf_output_handle {
820892 	struct perf_event		*event;
821
-	struct ring_buffer		*rb;
893
+	struct perf_buffer		*rb;
822894 	unsigned long			wakeup;
823895 	unsigned long			size;
824896 	u64				aux_flags;
....@@ -901,6 +973,9 @@
901973 extern void perf_sched_cb_inc(struct pmu *pmu);
902974 extern int perf_event_task_disable(void);
903975 extern int perf_event_task_enable(void);
976
+
977
+extern void perf_pmu_resched(struct pmu *pmu);
978
+
904979 extern int perf_event_refresh(struct perf_event *event, int refresh);
905980 extern void perf_event_update_userpage(struct perf_event *event);
906981 extern int perf_event_release_kernel(struct perf_event *event);
....@@ -949,18 +1024,14 @@
9491024 		u32	reserved;
9501025 	}				cpu_entry;
9511026 	struct perf_callchain_entry	*callchain;
1027
+	u64				aux_size;
9521028 
953
-	/*
954
-	 * regs_user may point to task_pt_regs or to regs_user_copy, depending
955
-	 * on arch details.
956
-	 */
9571029 	struct perf_regs		regs_user;
958
-	struct pt_regs			regs_user_copy;
959
-
9601030 	struct perf_regs		regs_intr;
9611031 	u64				stack_user_size;
9621032 
9631033 	u64				phys_addr;
1034
+	u64				cgroup;
9641035 } ____cacheline_aligned;
9651036 
9661037 /* default value for data source */
....@@ -1002,9 +1073,9 @@
10021073 extern void perf_event_output_backward(struct perf_event *event,
10031074 				       struct perf_sample_data *data,
10041075 				       struct pt_regs *regs);
1005
-extern void perf_event_output(struct perf_event *event,
1006
-			      struct perf_sample_data *data,
1007
-			      struct pt_regs *regs);
1076
+extern int perf_event_output(struct perf_event *event,
1077
+			     struct perf_sample_data *data,
1078
+			     struct pt_regs *regs);
10081079 
10091080 static inline bool
10101081 is_default_overflow_handler(struct perf_event *event)
....@@ -1027,6 +1098,15 @@
10271098 
10281099 extern void
10291100 perf_log_lost_samples(struct perf_event *event, u64 lost);
1101
+
1102
+static inline bool event_has_any_exclude_flag(struct perf_event *event)
1103
+{
1104
+	struct perf_event_attr *attr = &event->attr;
1105
+
1106
+	return attr->exclude_idle || attr->exclude_user ||
1107
+	       attr->exclude_kernel || attr->exclude_hv ||
1108
+	       attr->exclude_guest || attr->exclude_host;
1109
+}
10301110 
10311111 static inline bool is_sampling_event(struct perf_event *event)
10321112 {
....@@ -1064,12 +1144,18 @@
10641144 #endif
10651145 
10661146 /*
1067
- * Take a snapshot of the regs. Skip ip and frame pointer to
1068
- * the nth caller. We only need a few of the regs:
1147
+ * When generating a perf sample in-line, instead of from an interrupt /
1148
+ * exception, we lack a pt_regs. This is typically used from software events
1149
+ * like: SW_CONTEXT_SWITCHES, SW_MIGRATIONS and the tie-in with tracepoints.
1150
+ *
1151
+ * We typically don't need a full set, but (for x86) do require:
10691152  * - ip for PERF_SAMPLE_IP
10701153  * - cs for user_mode() tests
1071
- * - bp for callchains
1072
- * - eflags, for future purposes, just in case
1154
+ * - sp for PERF_SAMPLE_CALLCHAIN
1155
+ * - eflags for MISC bits and CALLCHAIN (see: perf_hw_regs())
1156
+ *
1157
+ * NOTE: assumes @regs is otherwise already 0 filled; this is important for
1158
+ * things like PERF_SAMPLE_REGS_INTR.
10731159  */
10741160 static inline void perf_fetch_caller_regs(struct pt_regs *regs)
10751161 {
....@@ -1142,7 +1228,25 @@
11421228 }
11431229 
11441230 extern void perf_event_mmap(struct vm_area_struct *vma);
1145
-extern struct perf_guest_info_callbacks *perf_guest_cbs;
1231
+
1232
+extern void perf_event_ksymbol(u16 ksym_type, u64 addr, u32 len,
1233
+			       bool unregister, const char *sym);
1234
+extern void perf_event_bpf_event(struct bpf_prog *prog,
1235
+				 enum perf_bpf_event_type type,
1236
+				 u16 flags);
1237
+
1238
+extern struct perf_guest_info_callbacks __rcu *perf_guest_cbs;
1239
+static inline struct perf_guest_info_callbacks *perf_get_guest_cbs(void)
1240
+{
1241
+	/*
1242
+	 * Callbacks are RCU-protected and must be READ_ONCE to avoid reloading
1243
+	 * the callbacks between a !NULL check and dereferences, to ensure
1244
+	 * pending stores/changes to the callback pointers are visible before a
1245
+	 * non-NULL perf_guest_cbs is visible to readers, and to prevent a
1246
+	 * module from unloading callbacks while readers are active.
1247
+	 */
1248
+	return rcu_dereference(perf_guest_cbs);
1249
+}
11461250 extern int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
11471251 extern int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
11481252 
....@@ -1150,6 +1254,9 @@
11501254 extern void perf_event_comm(struct task_struct *tsk, bool exec);
11511255 extern void perf_event_namespaces(struct task_struct *tsk);
11521256 extern void perf_event_fork(struct task_struct *tsk);
1257
+extern void perf_event_text_poke(const void *addr,
1258
+				 const void *old_bytes, size_t old_len,
1259
+				 const void *new_bytes, size_t new_len);
11531260 
11541261 /* Callchains */
11551262 DECLARE_PER_CPU(struct perf_callchain_entry, perf_callchain_entry);
....@@ -1162,6 +1269,8 @@
11621269 extern struct perf_callchain_entry *perf_callchain(struct perf_event *event, struct pt_regs *regs);
11631270 extern int get_callchain_buffers(int max_stack);
11641271 extern void put_callchain_buffers(void);
1272
+extern struct perf_callchain_entry *get_callchain_entry(int *rctx);
1273
+extern void put_callchain_entry(int rctx);
11651274 
11661275 extern int sysctl_perf_event_max_stack;
11671276 extern int sysctl_perf_event_max_contexts_per_stack;
....@@ -1198,15 +1307,12 @@
11981307 
11991308 extern void perf_sample_event_took(u64 sample_len_ns);
12001309 
1201
-extern int perf_proc_update_handler(struct ctl_table *table, int write,
1202
-		void __user *buffer, size_t *lenp,
1203
-		loff_t *ppos);
1204
-extern int perf_cpu_time_max_percent_handler(struct ctl_table *table, int write,
1205
-		void __user *buffer, size_t *lenp,
1206
-		loff_t *ppos);
1207
-
1310
+int perf_proc_update_handler(struct ctl_table *table, int write,
1311
+		void *buffer, size_t *lenp, loff_t *ppos);
1312
+int perf_cpu_time_max_percent_handler(struct ctl_table *table, int write,
1313
+		void *buffer, size_t *lenp, loff_t *ppos);
12081314 int perf_event_max_stack_handler(struct ctl_table *table, int write,
1209
-				 void __user *buffer, size_t *lenp, loff_t *ppos);
1315
+		void *buffer, size_t *lenp, loff_t *ppos);
12101316 
12111317 /* Access to perf_event_open(2) syscall. */
12121318 #define PERF_SECURITY_OPEN		0
....@@ -1216,11 +1322,6 @@
12161322 #define PERF_SECURITY_KERNEL		2
12171323 #define PERF_SECURITY_TRACEPOINT	3
12181324 
1219
-static inline bool perf_paranoid_any(void)
1220
-{
1221
-	return sysctl_perf_event_paranoid > 2;
1222
-}
1223
-
12241325 static inline int perf_is_paranoid(void)
12251326 {
12261327 	return sysctl_perf_event_paranoid > -1;
....@@ -1228,7 +1329,7 @@
12281329 
12291330 static inline int perf_allow_kernel(struct perf_event_attr *attr)
12301331 {
1231
-	if (sysctl_perf_event_paranoid > 1 && !capable(CAP_SYS_ADMIN))
1332
+	if (sysctl_perf_event_paranoid > 1 && !perfmon_capable())
12321333 		return -EACCES;
12331334 
12341335 	return security_perf_event_open(attr, PERF_SECURITY_KERNEL);
....@@ -1236,7 +1337,7 @@
12361337 
12371338 static inline int perf_allow_cpu(struct perf_event_attr *attr)
12381339 {
1239
-	if (sysctl_perf_event_paranoid > 0 && !capable(CAP_SYS_ADMIN))
1340
+	if (sysctl_perf_event_paranoid > 0 && !perfmon_capable())
12401341 		return -EACCES;
12411342 
12421343 	return security_perf_event_open(attr, PERF_SECURITY_CPU);
....@@ -1244,7 +1345,7 @@
12441345 
12451346 static inline int perf_allow_tracepoint(struct perf_event_attr *attr)
12461347 {
1247
-	if (sysctl_perf_event_paranoid > -1 && !capable(CAP_SYS_ADMIN))
1348
+	if (sysctl_perf_event_paranoid > -1 && !perfmon_capable())
12481349 		return -EPERM;
12491350 
12501351 	return security_perf_event_open(attr, PERF_SECURITY_TRACEPOINT);
....@@ -1308,11 +1409,14 @@
13081409 extern void perf_event_addr_filters_sync(struct perf_event *event);
13091410 
13101411 extern int perf_output_begin(struct perf_output_handle *handle,
1412
+			     struct perf_sample_data *data,
13111413 			     struct perf_event *event, unsigned int size);
13121414 extern int perf_output_begin_forward(struct perf_output_handle *handle,
1313
-				    struct perf_event *event,
1314
-				    unsigned int size);
1415
+				     struct perf_sample_data *data,
1416
+				     struct perf_event *event,
1417
+				     unsigned int size);
13151418 extern int perf_output_begin_backward(struct perf_output_handle *handle,
1419
+				      struct perf_sample_data *data,
13161420 				      struct perf_event *event,
13171421 				      unsigned int size);
13181422 
....@@ -1321,6 +1425,9 @@
13211425 			     const void *buf, unsigned int len);
13221426 extern unsigned int perf_output_skip(struct perf_output_handle *handle,
13231427 				     unsigned int len);
1428
+extern long perf_output_copy_aux(struct perf_output_handle *aux_handle,
1429
+				 struct perf_output_handle *handle,
1430
+				 unsigned long from, unsigned long to);
13241431 extern int perf_swevent_get_recursion_context(void);
13251432 extern void perf_swevent_put_recursion_context(int rctx);
13261433 extern u64 perf_swevent_set_period(struct perf_event *event);
....@@ -1330,6 +1437,8 @@
13301437 extern void perf_event_disable_inatomic(struct perf_event *event);
13311438 extern void perf_event_task_tick(void);
13321439 extern int perf_event_account_interrupt(struct perf_event *event);
1440
+extern int perf_event_period(struct perf_event *event, u64 value);
1441
+extern u64 perf_event_pause(struct perf_event *event, bool reset);
13331442 #else /* !CONFIG_PERF_EVENTS: */
13341443 static inline void *
13351444 perf_aux_output_begin(struct perf_output_handle *handle,
....@@ -1389,10 +1498,22 @@
13891498 (struct perf_guest_info_callbacks *callbacks)				{ return 0; }
13901499 
13911500 static inline void perf_event_mmap(struct vm_area_struct *vma)		{ }
1501
+
1502
+typedef int (perf_ksymbol_get_name_f)(char *name, int name_len, void *data);
1503
+static inline void perf_event_ksymbol(u16 ksym_type, u64 addr, u32 len,
1504
+				      bool unregister, const char *sym)	{ }
1505
+static inline void perf_event_bpf_event(struct bpf_prog *prog,
1506
+					enum perf_bpf_event_type type,
1507
+					u16 flags)			{ }
13921508 static inline void perf_event_exec(void)				{ }
13931509 static inline void perf_event_comm(struct task_struct *tsk, bool exec)	{ }
13941510 static inline void perf_event_namespaces(struct task_struct *tsk)	{ }
13951511 static inline void perf_event_fork(struct task_struct *tsk)		{ }
1512
+static inline void perf_event_text_poke(const void *addr,
1513
+					const void *old_bytes,
1514
+					size_t old_len,
1515
+					const void *new_bytes,
1516
+					size_t new_len)			{ }
13961517 static inline void perf_event_init(void)				{ }
13971518 static inline int  perf_swevent_get_recursion_context(void)		{ return -1; }
13981519 static inline void perf_swevent_put_recursion_context(int rctx)		{ }
....@@ -1402,6 +1523,14 @@
14021523 static inline int __perf_event_disable(void *info)			{ return -1; }
14031524 static inline void perf_event_task_tick(void)				{ }
14041525 static inline int perf_event_release_kernel(struct perf_event *event)	{ return 0; }
1526
+static inline int perf_event_period(struct perf_event *event, u64 value)
1527
+{
1528
+	return -EINVAL;
1529
+}
1530
+static inline u64 perf_event_pause(struct perf_event *event, bool reset)
1531
+{
1532
+	return 0;
1533
+}
14051534 #endif
14061535 
14071536 #if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_CPU_SUP_INTEL)
....@@ -1467,4 +1596,8 @@
14671596 #define perf_event_exit_cpu	NULL
14681597 #endif
14691598 
1599
+extern void __weak arch_perf_update_userpage(struct perf_event *event,
1600
+					     struct perf_event_mmap_page *userpg,
1601
+					     u64 now);
1602
+
14701603 #endif /* _LINUX_PERF_EVENT_H */