211 static bool is_kernel_event(struct perf_event *event)  in is_kernel_event()  argument
213 	return READ_ONCE(event->owner) == TASK_TOMBSTONE;  in is_kernel_event()
233  *  - removing the last event from a task ctx; this is relatively straight
236  *  - adding the first event to a task ctx; this is tricky because we cannot
247 	struct perf_event *event;  member
255 	struct perf_event *event = efs->event;  in event_function()  local
256 	struct perf_event_context *ctx = event->ctx;  in event_function()
291 	efs->func(event, cpuctx, ctx, efs->data);  in event_function()
298 static void event_function_call(struct perf_event *event, event_f func, void *data)  in event_function_call()  argument
300 	struct perf_event_context *ctx = event->ctx;  in event_function_call()
304 		.event = event,  in event_function_call()
309 	if (!event->parent) {  in event_function_call()
311 		 * If this is a !child event, we must hold ctx::mutex to  in event_function_call()
312 		 * stabilize the event->ctx relation. See  in event_function_call()
319 		cpu_function_call(event->cpu, event_function, &efs);  in event_function_call()
345 	func(event, NULL, ctx, data);  in event_function_call()
355 static void event_function_local(struct perf_event *event, event_f func, void *data)  in event_function_local()  argument
357 	struct perf_event_context *ctx = event->ctx;  in event_function_local()
394 	func(event, cpuctx, ctx, data);  in event_function_local()
447  * perf event paranoia level:
459  * max perf event sample rate
609 static u64 perf_event_time(struct perf_event *event);
618 static inline u64 perf_event_clock(struct perf_event *event)  in perf_event_clock()  argument
620 	return event->clock();  in perf_event_clock()
624  * State based event timekeeping...
626  * The basic idea is to use event->state to determine which (if any) time
631  * Event groups make things a little more complicated, but not terribly so. The
646 __perf_effective_state(struct perf_event *event)  in __perf_effective_state()  argument
648 	struct perf_event *leader = event->group_leader;  in __perf_effective_state()
653 	return event->state;  in __perf_effective_state()
657 __perf_update_times(struct perf_event *event, u64 now, u64 *enabled, u64 *running)  in __perf_update_times()  argument
659 	enum perf_event_state state = __perf_effective_state(event);  in __perf_update_times()
660 	u64 delta = now - event->tstamp;  in __perf_update_times()
662 	*enabled = event->total_time_enabled;  in __perf_update_times()
666 	*running = event->total_time_running;  in __perf_update_times()
671 static void perf_event_update_time(struct perf_event *event)  in perf_event_update_time()  argument
673 	u64 now = perf_event_time(event);  in perf_event_update_time()
675 	__perf_update_times(event, now, &event->total_time_enabled,  in perf_event_update_time()
676 					&event->total_time_running);  in perf_event_update_time()
677 	event->tstamp = now;  in perf_event_update_time()
689 perf_event_set_state(struct perf_event *event, enum perf_event_state state)  in perf_event_set_state()  argument
691 	if (event->state == state)  in perf_event_set_state()
694 	perf_event_update_time(event);  in perf_event_set_state()
699 	if ((event->state < 0) ^ (state < 0))  in perf_event_set_state()
700 		perf_event_update_sibling_time(event);  in perf_event_set_state()
702 	WRITE_ONCE(event->state, state);  in perf_event_set_state()
752 perf_cgroup_match(struct perf_event *event)  in perf_cgroup_match()  argument
756 	/* @event doesn't care about cgroup */  in perf_cgroup_match()
757 	if (!event->cgrp)  in perf_cgroup_match()
765 	 * Cgroup scoping is recursive.  An event enabled for a cgroup is  in perf_cgroup_match()
767 	 * cgroup is a descendant of @event's (the test covers identity  in perf_cgroup_match()
771 				    event->cgrp->css.cgroup);  in perf_cgroup_match()
774 static inline void perf_detach_cgroup(struct perf_event *event)  in perf_detach_cgroup()  argument
776 	css_put(&event->cgrp->css);  in perf_detach_cgroup()
777 	event->cgrp = NULL;  in perf_detach_cgroup()
780 static inline int is_cgroup_event(struct perf_event *event)  in is_cgroup_event()  argument
782 	return event->cgrp != NULL;  in is_cgroup_event()
785 static inline u64 perf_cgroup_event_time(struct perf_event *event)  in perf_cgroup_event_time()  argument
789 	t = per_cpu_ptr(event->cgrp->info, event->cpu);  in perf_cgroup_event_time()
793 static inline u64 perf_cgroup_event_time_now(struct perf_event *event, u64 now)  in perf_cgroup_event_time_now()  argument
797 	t = per_cpu_ptr(event->cgrp->info, event->cpu);  in perf_cgroup_event_time_now()
835 static inline void update_cgrp_time_from_event(struct perf_event *event)  in update_cgrp_time_from_event()  argument
843 	if (!is_cgroup_event(event))  in update_cgrp_time_from_event()
846 	info = this_cpu_ptr(event->cgrp->info);  in update_cgrp_time_from_event()
889 	 * cpuctx->cgrp is set when the first cgroup event enabled,  in perf_cgroup_switch()
890 	 * and is cleared when the last cgroup event disabled.  in perf_cgroup_switch()
922 static int perf_cgroup_ensure_storage(struct perf_event *event,  in perf_cgroup_ensure_storage()  argument
963 static inline int perf_cgroup_connect(int fd, struct perf_event *event,  in perf_cgroup_connect()  argument
980 	ret = perf_cgroup_ensure_storage(event, css);  in perf_cgroup_connect()
985 	event->cgrp = cgrp;  in perf_cgroup_connect()
993 		perf_detach_cgroup(event);  in perf_cgroup_connect()
1000 perf_cgroup_event_enable(struct perf_event *event, struct perf_event_context *ctx)  in perf_cgroup_event_enable()  argument
1004 	if (!is_cgroup_event(event))  in perf_cgroup_event_enable()
1007 	event->pmu_ctx->nr_cgroups++;  in perf_cgroup_event_enable()
1022 perf_cgroup_event_disable(struct perf_event *event, struct perf_event_context *ctx)  in perf_cgroup_event_disable()  argument
1026 	if (!is_cgroup_event(event))  in perf_cgroup_event_disable()
1029 	event->pmu_ctx->nr_cgroups--;  in perf_cgroup_event_disable()
1046 perf_cgroup_match(struct perf_event *event)  in perf_cgroup_match()  argument
1051 static inline void perf_detach_cgroup(struct perf_event *event)  in perf_detach_cgroup()  argument
1054 static inline int is_cgroup_event(struct perf_event *event)  in is_cgroup_event()  argument
1059 static inline void update_cgrp_time_from_event(struct perf_event *event)  in update_cgrp_time_from_event()  argument
1068 static inline int perf_cgroup_connect(pid_t pid, struct perf_event *event,  in perf_cgroup_connect()  argument
1080 static inline u64 perf_cgroup_event_time(struct perf_event *event)  in perf_cgroup_event_time()  argument
1085 static inline u64 perf_cgroup_event_time_now(struct perf_event *event, u64 now)  in perf_cgroup_event_time_now()  argument
1091 perf_cgroup_event_enable(struct perf_event *event, struct perf_event_context *ctx)  in perf_cgroup_event_enable()  argument
1096 perf_cgroup_event_disable(struct perf_event *event, struct perf_event_context *ctx)  in perf_cgroup_event_disable()  argument
1264  * because the sys_perf_event_open() case will install a new event and break
1275  * quiesce the event, after which we can install it in the new location. This
1276  * means that only external vectors (perf_fops, prctl) can perturb the event
1280  * However; because event->ctx can change while we're waiting to acquire
1300 perf_event_ctx_lock_nested(struct perf_event *event, int nesting)  in perf_event_ctx_lock_nested()  argument
1306 	ctx = READ_ONCE(event->ctx);  in perf_event_ctx_lock_nested()
1314 	if (event->ctx != ctx) {  in perf_event_ctx_lock_nested()
1324 perf_event_ctx_lock(struct perf_event *event)  in perf_event_ctx_lock()  argument
1326 	return perf_event_ctx_lock_nested(event, 0);  in perf_event_ctx_lock()
1329 static void perf_event_ctx_unlock(struct perf_event *event,  in perf_event_ctx_unlock()  argument
1355 static u32 perf_event_pid_type(struct perf_event *event, struct task_struct *p,  in perf_event_pid_type()  argument
1362 	if (event->parent)  in perf_event_pid_type()
1363 		event = event->parent;  in perf_event_pid_type()
1365 	nr = __task_pid_nr_ns(p, type, event->ns);  in perf_event_pid_type()
1372 static u32 perf_event_pid(struct perf_event *event, struct task_struct *p)  in perf_event_pid()  argument
1374 	return perf_event_pid_type(event, p, PIDTYPE_TGID);  in perf_event_pid()
1377 static u32 perf_event_tid(struct perf_event *event, struct task_struct *p)  in perf_event_tid()  argument
1379 	return perf_event_pid_type(event, p, PIDTYPE_PID);  in perf_event_tid()
1383  * If we inherit events we want to return the parent event id
1386 static u64 primary_event_id(struct perf_event *event)  in primary_event_id()  argument
1388 	u64 id = event->id;  in primary_event_id()
1390 	if (event->parent)  in primary_event_id()
1391 		id = event->parent->id;  in primary_event_id()
1511 static u64 perf_event_time(struct perf_event *event)  in perf_event_time()  argument
1513 	struct perf_event_context *ctx = event->ctx;  in perf_event_time()
1518 	if (is_cgroup_event(event))  in perf_event_time()
1519 		return perf_cgroup_event_time(event);  in perf_event_time()
1524 static u64 perf_event_time_now(struct perf_event *event, u64 now)  in perf_event_time_now()  argument
1526 	struct perf_event_context *ctx = event->ctx;  in perf_event_time_now()
1531 	if (is_cgroup_event(event))  in perf_event_time_now()
1532 		return perf_cgroup_event_time_now(event, now);  in perf_event_time_now()
1541 static enum event_type_t get_event_type(struct perf_event *event)  in get_event_type()  argument
1543 	struct perf_event_context *ctx = event->ctx;  in get_event_type()
1552 	if (event->group_leader != event)  in get_event_type()
1553 		event = event->group_leader;  in get_event_type()
1555 	event_type = event->attr.pinned ? EVENT_PINNED : EVENT_FLEXIBLE;  in get_event_type()
1563  * Helper function to initialize event group nodes.
1565 static void init_event_group(struct perf_event *event)  in init_event_group()  argument
1567 	RB_CLEAR_NODE(&event->group_node);  in init_event_group()
1568 	event->group_index = 0;  in init_event_group()
1573  * based on event attrs bits.
1576 get_event_groups(struct perf_event *event, struct perf_event_context *ctx)  in get_event_groups()  argument
1578 	if (event->attr.pinned)  in get_event_groups()
1593 static inline struct cgroup *event_cgroup(const struct perf_event *event)  in event_cgroup()  argument
1598 	if (event->cgrp)  in event_cgroup()
1599 		cgroup = event->cgrp->css.cgroup;  in event_cgroup()
1606  * Compare function for event groups;
1701  * Insert @event into @groups' tree; using
1702  *   {@event->cpu, @event->pmu_ctx->pmu, event_cgroup(@event), ++@groups->index}
1707 			 struct perf_event *event)  in perf_event_groups_insert()  argument
1709 	event->group_index = ++groups->index;  in perf_event_groups_insert()
1711 	rb_add(&event->group_node, &groups->tree, __group_less);  in perf_event_groups_insert()
1715  * Helper function to insert event into the pinned or flexible groups.
1718 add_event_to_groups(struct perf_event *event, struct perf_event_context *ctx)  in add_event_to_groups()  argument
1722 	groups = get_event_groups(event, ctx);  in add_event_to_groups()
1723 	perf_event_groups_insert(groups, event);  in add_event_to_groups()
1731 			 struct perf_event *event)  in perf_event_groups_delete()  argument
1733 	WARN_ON_ONCE(RB_EMPTY_NODE(&event->group_node) ||  in perf_event_groups_delete()
1736 	rb_erase(&event->group_node, &groups->tree);  in perf_event_groups_delete()
1737 	init_event_group(event);  in perf_event_groups_delete()
1741  * Helper function to delete event from its groups.
1744 del_event_from_groups(struct perf_event *event, struct perf_event_context *ctx)  in del_event_from_groups()  argument
1748 	groups = get_event_groups(event, ctx);  in del_event_from_groups()
1749 	perf_event_groups_delete(groups, event);  in del_event_from_groups()
1753  * Get the leftmost event in the {cpu,pmu,cgroup} subtree.
1774 perf_event_groups_next(struct perf_event *event, struct pmu *pmu)  in perf_event_groups_next()  argument
1777 		.cpu = event->cpu,  in perf_event_groups_next()
1779 		.cgroup = event_cgroup(event),  in perf_event_groups_next()
1783 	next = rb_next_match(&key, &event->group_node, __group_cmp);  in perf_event_groups_next()
1790 #define perf_event_groups_for_cpu_pmu(event, groups, cpu, pmu)		\  argument
1791 	for (event = perf_event_groups_first(groups, cpu, pmu, NULL);	\
1792 	     event; event = perf_event_groups_next(event, pmu))
1797 #define perf_event_groups_for_each(event, groups)			\  argument
1798 	for (event = rb_entry_safe(rb_first(&((groups)->tree)),		\
1799 				typeof(*event), group_node); event;	\
1800 		event = rb_entry_safe(rb_next(&event->group_node),	\
1801 				typeof(*event), group_node))
1804  * Does the event attribute request inherit with PERF_SAMPLE_READ
1812  * Add an event from the lists for its context.
1816 list_add_event(struct perf_event *event, struct perf_event_context *ctx)  in list_add_event()  argument
1820 	WARN_ON_ONCE(event->attach_state & PERF_ATTACH_CONTEXT);  in list_add_event()
1821 	event->attach_state |= PERF_ATTACH_CONTEXT;  in list_add_event()
1823 	event->tstamp = perf_event_time(event);  in list_add_event()
1826 	 * If we're a stand alone event or group leader, we go to the context  in list_add_event()
1830 	if (event->group_leader == event) {  in list_add_event()
1831 		event->group_caps = event->event_caps;  in list_add_event()
1832 		add_event_to_groups(event, ctx);  in list_add_event()
1835 	list_add_rcu(&event->event_entry, &ctx->event_list);  in list_add_event()
1837 	if (event->hw.flags & PERF_EVENT_FLAG_USER_READ_CNT)  in list_add_event()
1839 	if (event->attr.inherit_stat)  in list_add_event()
1841 	if (has_inherit_and_sample_read(&event->attr))  in list_add_event()
1844 	if (event->state > PERF_EVENT_STATE_OFF)  in list_add_event()
1845 		perf_cgroup_event_enable(event, ctx);  in list_add_event()
1848 	event->pmu_ctx->nr_events++;  in list_add_event()
1852  * Initialize event state based on the perf_event_attr::disabled.
1854 static inline void perf_event__state_init(struct perf_event *event)  in perf_event__state_init()  argument
1856 	event->state = event->attr.disabled ? PERF_EVENT_STATE_OFF :  in perf_event__state_init()
1890 static void __perf_event_header_size(struct perf_event *event, u64 sample_type)  in __perf_event_header_size()  argument
1908 		size += event->read_size;  in __perf_event_header_size()
1928 	event->header_size = size;  in __perf_event_header_size()
1935 static void perf_event__header_size(struct perf_event *event)  in perf_event__header_size()  argument
1937 	event->read_size =  in perf_event__header_size()
1938 		__perf_event_read_size(event->attr.read_format,  in perf_event__header_size()
1939 				       event->group_leader->nr_siblings);  in perf_event__header_size()
1940 	__perf_event_header_size(event, event->attr.sample_type);  in perf_event__header_size()
1943 static void perf_event__id_header_size(struct perf_event *event)  in perf_event__id_header_size()  argument
1946 	u64 sample_type = event->attr.sample_type;  in perf_event__id_header_size()
1967 	event->id_header_size = size;  in perf_event__id_header_size()
1971  * Check that adding an event to the group does not result in anybody
1972  * overflowing the 64k event limit imposed by the output buffer.
1974  * Specifically, check that the read_size for the event does not exceed 16k,
1976  * depends on per-event read_format, also (re)check the existing events.
1981 static bool perf_event_validate_size(struct perf_event *event)  in perf_event_validate_size()  argument
1983 	struct perf_event *sibling, *group_leader = event->group_leader;  in perf_event_validate_size()
1985 	if (__perf_event_read_size(event->attr.read_format,  in perf_event_validate_size()
2000 	if (event == group_leader)  in perf_event_validate_size()
2012 static void perf_group_attach(struct perf_event *event)  in perf_group_attach()  argument
2014 	struct perf_event *group_leader = event->group_leader, *pos;  in perf_group_attach()
2016 	lockdep_assert_held(&event->ctx->lock);  in perf_group_attach()
2022 	if (event->attach_state & PERF_ATTACH_GROUP)  in perf_group_attach()
2025 	event->attach_state |= PERF_ATTACH_GROUP;  in perf_group_attach()
2027 	if (group_leader == event)  in perf_group_attach()
2030 	WARN_ON_ONCE(group_leader->ctx != event->ctx);  in perf_group_attach()
2032 	group_leader->group_caps &= event->event_caps;  in perf_group_attach()
2034 	list_add_tail(&event->sibling_list, &group_leader->sibling_list);  in perf_group_attach()
2045  * Remove an event from the lists for its context.
2049 list_del_event(struct perf_event *event, struct perf_event_context *ctx)  in list_del_event()  argument
2051 	WARN_ON_ONCE(event->ctx != ctx);  in list_del_event()
2057 	if (!(event->attach_state & PERF_ATTACH_CONTEXT))  in list_del_event()
2060 	event->attach_state &= ~PERF_ATTACH_CONTEXT;  in list_del_event()
2063 	if (event->hw.flags & PERF_EVENT_FLAG_USER_READ_CNT)  in list_del_event()
2065 	if (event->attr.inherit_stat)  in list_del_event()
2067 	if (has_inherit_and_sample_read(&event->attr))  in list_del_event()
2070 	list_del_rcu(&event->event_entry);  in list_del_event()
2072 	if (event->group_leader == event)  in list_del_event()
2073 		del_event_from_groups(event, ctx);  in list_del_event()
2076 	 * If event was in error state, then keep it  in list_del_event()
2080 	 * of the event  in list_del_event()
2082 	if (event->state > PERF_EVENT_STATE_OFF) {  in list_del_event()
2083 		perf_cgroup_event_disable(event, ctx);  in list_del_event()
2084 		perf_event_set_state(event, PERF_EVENT_STATE_OFF);  in list_del_event()
2088 	event->pmu_ctx->nr_events--;  in list_del_event()
2092 perf_aux_output_match(struct perf_event *event, struct perf_event *aux_event)  in perf_aux_output_match()  argument
2097 	if (!event->pmu->aux_output_match)  in perf_aux_output_match()
2100 	return event->pmu->aux_output_match(aux_event);  in perf_aux_output_match()
2103 static void put_event(struct perf_event *event);
2104 static void event_sched_out(struct perf_event *event,
2107 static void perf_put_aux_event(struct perf_event *event)  in perf_put_aux_event()  argument
2109 	struct perf_event_context *ctx = event->ctx;  in perf_put_aux_event()
2113 	 * If event uses aux_event tear down the link  in perf_put_aux_event()
2115 	if (event->aux_event) {  in perf_put_aux_event()
2116 		iter = event->aux_event;  in perf_put_aux_event()
2117 		event->aux_event = NULL;  in perf_put_aux_event()
2123 	 * If the event is an aux_event, tear down all links to  in perf_put_aux_event()
2126 	for_each_sibling_event(iter, event->group_leader) {  in perf_put_aux_event()
2127 		if (iter->aux_event != event)  in perf_put_aux_event()
2131 		put_event(event);  in perf_put_aux_event()
2139 		perf_event_set_state(event, PERF_EVENT_STATE_ERROR);  in perf_put_aux_event()
2143 static bool perf_need_aux_event(struct perf_event *event)  in perf_need_aux_event()  argument
2145 	return event->attr.aux_output || has_aux_action(event);  in perf_need_aux_event()
2148 static int perf_get_aux_event(struct perf_event *event,  in perf_get_aux_event()  argument
2152 	 * Our group leader must be an aux event if we want to be  in perf_get_aux_event()
2153 	 * an aux_output. This way, the aux event will precede its  in perf_get_aux_event()
2163 	if (event->attr.aux_output && event->attr.aux_sample_size)  in perf_get_aux_event()
2166 	if (event->attr.aux_output &&  in perf_get_aux_event()
2167 	    !perf_aux_output_match(event, group_leader))  in perf_get_aux_event()
2170 	if ((event->attr.aux_pause || event->attr.aux_resume) &&  in perf_get_aux_event()
2174 	if (event->attr.aux_sample_size && !group_leader->pmu->snapshot_aux)  in perf_get_aux_event()
2181 	 * Link aux_outputs to their aux event; this is undone in  in perf_get_aux_event()
2186 	event->aux_event = group_leader;  in perf_get_aux_event()
2191 static inline struct list_head *get_event_list(struct perf_event *event)  in get_event_list()  argument
2193 	return event->attr.pinned ? &event->pmu_ctx->pinned_active :  in get_event_list()
2194 				    &event->pmu_ctx->flexible_active;  in get_event_list()
2203 static inline void perf_remove_sibling_event(struct perf_event *event)  in perf_remove_sibling_event()  argument
2205 	event_sched_out(event, event->ctx);  in perf_remove_sibling_event()
2206 	perf_event_set_state(event, PERF_EVENT_STATE_ERROR);  in perf_remove_sibling_event()
2209 static void perf_group_detach(struct perf_event *event)  in perf_group_detach()  argument
2211 	struct perf_event *leader = event->group_leader;  in perf_group_detach()
2213 	struct perf_event_context *ctx = event->ctx;  in perf_group_detach()
2220 	if (!(event->attach_state & PERF_ATTACH_GROUP))  in perf_group_detach()
2223 	event->attach_state &= ~PERF_ATTACH_GROUP;  in perf_group_detach()
2225 	perf_put_aux_event(event);  in perf_group_detach()
2230 	if (leader != event) {  in perf_group_detach()
2231 		list_del_init(&event->sibling_list);  in perf_group_detach()
2232 		event->group_leader->nr_siblings--;  in perf_group_detach()
2233 		event->group_leader->group_generation++;  in perf_group_detach()
2238 	 * If this was a group event with sibling events then  in perf_group_detach()
2242 	list_for_each_entry_safe(sibling, tmp, &event->sibling_list, sibling_list) {  in perf_group_detach()
2251 		sibling->group_caps = event->group_caps;  in perf_group_detach()
2254 			add_event_to_groups(sibling, event->ctx);  in perf_group_detach()
2260 		WARN_ON_ONCE(sibling->ctx != event->ctx);  in perf_group_detach()
2272 static void perf_child_detach(struct perf_event *event)  in perf_child_detach()  argument
2274 	struct perf_event *parent_event = event->parent;  in perf_child_detach()
2276 	if (!(event->attach_state & PERF_ATTACH_CHILD))  in perf_child_detach()
2279 	event->attach_state &= ~PERF_ATTACH_CHILD;  in perf_child_detach()
2286 	sync_child_event(event);  in perf_child_detach()
2287 	list_del_init(&event->child_list);  in perf_child_detach()
2290 static bool is_orphaned_event(struct perf_event *event)  in is_orphaned_event()  argument
2292 	return event->state == PERF_EVENT_STATE_DEAD;  in is_orphaned_event()
2296 event_filter_match(struct perf_event *event)  in event_filter_match()  argument
2298 	return (event->cpu == -1 || event->cpu == smp_processor_id()) &&  in event_filter_match()
2299 	       perf_cgroup_match(event);  in event_filter_match()
2303 event_sched_out(struct perf_event *event, struct perf_event_context *ctx)  in event_sched_out()  argument
2305 	struct perf_event_pmu_context *epc = event->pmu_ctx;  in event_sched_out()
2311 	WARN_ON_ONCE(event->ctx != ctx);  in event_sched_out()
2314 	if (event->state != PERF_EVENT_STATE_ACTIVE)  in event_sched_out()
2322 	list_del_init(&event->active_list);  in event_sched_out()
2324 	perf_pmu_disable(event->pmu);  in event_sched_out()
2326 	event->pmu->del(event, 0);  in event_sched_out()
2327 	event->oncpu = -1;  in event_sched_out()
2329 	if (event->pending_disable) {  in event_sched_out()
2330 		event->pending_disable = 0;  in event_sched_out()
2331 		perf_cgroup_event_disable(event, ctx);  in event_sched_out()
2335 	perf_event_set_state(event, state);  in event_sched_out()
2337 	if (!is_software_event(event))  in event_sched_out()
2339 	if (event->attr.freq && event->attr.sample_freq) {  in event_sched_out()
2343 	if (event->attr.exclusive || !cpc->active_oncpu)  in event_sched_out()
2346 	perf_pmu_enable(event->pmu);  in event_sched_out()
2352 	struct perf_event *event;  in group_sched_out()  local
2364 	for_each_sibling_event(event, group_event)  in group_sched_out()
2365 		event_sched_out(event, ctx);  in group_sched_out()
2397 ctx_time_update_event(struct perf_event_context *ctx, struct perf_event *event)  in ctx_time_update_event()  argument
2403 		update_cgrp_time_from_event(event);  in ctx_time_update_event()
2413  * Cross CPU call to remove a performance event
2415  * We disable the event on the hardware level first. After that we
2419 __perf_remove_from_context(struct perf_event *event,  in __perf_remove_from_context()  argument
2424 	struct perf_event_pmu_context *pmu_ctx = event->pmu_ctx;  in __perf_remove_from_context()
2437 		event->pending_disable = 1;  in __perf_remove_from_context()
2440 	event_sched_out(event, ctx);  in __perf_remove_from_context()
2441 	perf_event_set_state(event, min(event->state, state));  in __perf_remove_from_context()
2443 		perf_group_detach(event);  in __perf_remove_from_context()
2445 		perf_child_detach(event);  in __perf_remove_from_context()
2446 	list_del_event(event, ctx);  in __perf_remove_from_context()
2473  * Remove the event from a task's (or a CPU's) list of events.
2475  * If event->ctx is a cloned context, callers must make sure that
2476  * every task struct that event->ctx->task could possibly point to
2482 static void perf_remove_from_context(struct perf_event *event, unsigned long flags)  in perf_remove_from_context()  argument
2484 	struct perf_event_context *ctx = event->ctx;  in perf_remove_from_context()
2495 		__perf_remove_from_context(event, this_cpu_ptr(&perf_cpu_context),  in perf_remove_from_context()
2502 	event_function_call(event, __perf_remove_from_context, (void *)flags);  in perf_remove_from_context()
2506  * Cross CPU call to disable a performance event
2508 static void __perf_event_disable(struct perf_event *event,  in __perf_event_disable()  argument
2513 	if (event->state < PERF_EVENT_STATE_INACTIVE)  in __perf_event_disable()
2516 	perf_pmu_disable(event->pmu_ctx->pmu);  in __perf_event_disable()
2517 	ctx_time_update_event(ctx, event);  in __perf_event_disable()
2519 	if (event == event->group_leader)  in __perf_event_disable()
2520 		group_sched_out(event, ctx);  in __perf_event_disable()
2522 		event_sched_out(event, ctx);  in __perf_event_disable()
2524 	perf_event_set_state(event, PERF_EVENT_STATE_OFF);  in __perf_event_disable()
2525 	perf_cgroup_event_disable(event, ctx);  in __perf_event_disable()
2527 	perf_pmu_enable(event->pmu_ctx->pmu);  in __perf_event_disable()
2531  * Disable an event.
2533  * If event->ctx is a cloned context, callers must make sure that
2534  * every task struct that event->ctx->task could possibly point to
2537  * hold the top-level event's child_mutex, so any descendant that
2540  * When called from perf_pending_disable it's OK because event->ctx
2544 static void _perf_event_disable(struct perf_event *event)  in _perf_event_disable()  argument
2546 	struct perf_event_context *ctx = event->ctx;  in _perf_event_disable()
2549 	if (event->state <= PERF_EVENT_STATE_OFF) {  in _perf_event_disable()
2555 	event_function_call(event, __perf_event_disable, NULL);  in _perf_event_disable()
2558 void perf_event_disable_local(struct perf_event *event)  in perf_event_disable_local()  argument
2560 	event_function_local(event, __perf_event_disable, NULL);  in perf_event_disable_local()
2567 void perf_event_disable(struct perf_event *event)  in perf_event_disable()  argument
2571 	ctx = perf_event_ctx_lock(event);  in perf_event_disable()
2572 	_perf_event_disable(event);  in perf_event_disable()
2573 	perf_event_ctx_unlock(event, ctx);  in perf_event_disable()
2577 void perf_event_disable_inatomic(struct perf_event *event)  in perf_event_disable_inatomic()  argument
2579 	event->pending_disable = 1;  in perf_event_disable_inatomic()
2580 	irq_work_queue(&event->pending_disable_irq);  in perf_event_disable_inatomic()
2585 static void perf_log_throttle(struct perf_event *event, int enable);
2586 static void perf_log_itrace_start(struct perf_event *event);
2589 event_sched_in(struct perf_event *event, struct perf_event_context *ctx)  in event_sched_in()  argument
2591 	struct perf_event_pmu_context *epc = event->pmu_ctx;  in event_sched_in()
2595 	WARN_ON_ONCE(event->ctx != ctx);  in event_sched_in()
2599 	if (event->state <= PERF_EVENT_STATE_OFF)  in event_sched_in()
2602 	WRITE_ONCE(event->oncpu, smp_processor_id());  in event_sched_in()
2604 	 * Order event::oncpu write to happen before the ACTIVE state is  in event_sched_in()
2609 	perf_event_set_state(event, PERF_EVENT_STATE_ACTIVE);  in event_sched_in()
2616 	if (unlikely(event->hw.interrupts == MAX_INTERRUPTS)) {  in event_sched_in()
2617 		perf_log_throttle(event, 1);  in event_sched_in()
2618 		event->hw.interrupts = 0;  in event_sched_in()
2621 	perf_pmu_disable(event->pmu);  in event_sched_in()
2623 	perf_log_itrace_start(event);  in event_sched_in()
2625 	if (event->pmu->add(event, PERF_EF_START)) {  in event_sched_in()
2626 		perf_event_set_state(event, PERF_EVENT_STATE_INACTIVE);  in event_sched_in()
2627 		event->oncpu = -1;  in event_sched_in()
2632 	if (!is_software_event(event))  in event_sched_in()
2634 	if (event->attr.freq && event->attr.sample_freq) {  in event_sched_in()
2638 	if (event->attr.exclusive)  in event_sched_in()
2642 	perf_pmu_enable(event->pmu);  in event_sched_in()
2650 	struct perf_event *event, *partial_group = NULL;  in group_sched_in()  local
2664 	for_each_sibling_event(event, group_event) {  in group_sched_in()
2665 		if (event_sched_in(event, ctx)) {  in group_sched_in()
2666 			partial_group = event;  in group_sched_in()
2678 	 * The events up to the failed event are scheduled out normally.  in group_sched_in()
2680 	for_each_sibling_event(event, group_event) {  in group_sched_in()
2681 		if (event == partial_group)  in group_sched_in()
2684 		event_sched_out(event, ctx);  in group_sched_in()
2694  * Work out whether we can put this event group on the CPU now.
2696 static int group_can_go_on(struct perf_event *event, int can_add_hw)  in group_can_go_on()  argument
2698 	struct perf_event_pmu_context *epc = event->pmu_ctx;  in group_can_go_on()
2704 	if (event->group_caps & PERF_EV_CAP_SOFTWARE)  in group_can_go_on()
2716 	if (event->attr.exclusive && !list_empty(get_event_list(event)))  in group_can_go_on()
2725 static void add_event_to_ctx(struct perf_event *event,  in add_event_to_ctx()  argument
2728 	list_add_event(event, ctx);  in add_event_to_ctx()
2729 	perf_group_attach(event);  in add_event_to_ctx()
2767  * time an event is added, only do it for the groups of equal priority and
2834  * Cross CPU call to install and enable a performance event
2841 	struct perf_event *event = info;  in __perf_install_in_context()  local
2842 	struct perf_event_context *ctx = event->ctx;  in __perf_install_in_context()
2873 	if (event->state > PERF_EVENT_STATE_OFF && is_cgroup_event(event)) {  in __perf_install_in_context()
2875 		 * If the current cgroup doesn't match the event's  in __perf_install_in_context()
2880 					event->cgrp->css.cgroup);  in __perf_install_in_context()
2886 		add_event_to_ctx(event, ctx);  in __perf_install_in_context()
2887 		ctx_resched(cpuctx, task_ctx, event->pmu_ctx->pmu,  in __perf_install_in_context()
2888 			    get_event_type(event));  in __perf_install_in_context()
2890 		add_event_to_ctx(event, ctx);  in __perf_install_in_context()
2899 static bool exclusive_event_installable(struct perf_event *event,
2903  * Attach a performance event to a context.
2909 			struct perf_event *event,  in perf_install_in_context()  argument
2916 	WARN_ON_ONCE(!exclusive_event_installable(event, ctx));  in perf_install_in_context()
2918 	if (event->cpu != -1)  in perf_install_in_context()
2919 		WARN_ON_ONCE(event->cpu != cpu);  in perf_install_in_context()
2922 	 * Ensures that if we can observe event->ctx, both the event and ctx  in perf_install_in_context()
2925 	smp_store_release(&event->ctx, ctx);  in perf_install_in_context()
2929 	 * without IPI. Except when this is the first event for the context, in  in perf_install_in_context()
2933 	 * event will issue the IPI and reprogram the hardware.  in perf_install_in_context()
2935 	if (__perf_effective_state(event) == PERF_EVENT_STATE_OFF &&  in perf_install_in_context()
2936 	    ctx->nr_events && !is_cgroup_event(event)) {  in perf_install_in_context()
2942 		add_event_to_ctx(event, ctx);  in perf_install_in_context()
2948 		cpu_function_call(cpu, __perf_install_in_context, event);  in perf_install_in_context()
2990 	if (!task_function_call(task, __perf_install_in_context, event))  in perf_install_in_context()
3006 	 * thus we can safely install the event.  in perf_install_in_context()
3012 	add_event_to_ctx(event, ctx);  in perf_install_in_context()
3017  * Cross CPU call to enable a performance event
3019 static void __perf_event_enable(struct perf_event *event,  in __perf_event_enable()  argument
3024 	struct perf_event *leader = event->group_leader;  in __perf_event_enable()
3027 	if (event->state >= PERF_EVENT_STATE_INACTIVE ||  in __perf_event_enable()
3028 	    event->state <= PERF_EVENT_STATE_ERROR)  in __perf_event_enable()
3033 	perf_event_set_state(event, PERF_EVENT_STATE_INACTIVE);  in __perf_event_enable()
3034 	perf_cgroup_event_enable(event, ctx);  in __perf_event_enable()
3039 	if (!event_filter_match(event))  in __perf_event_enable()
3043 	 * If the event is in a group and isn't the group leader,  in __perf_event_enable()
3046 	if (leader != event && leader->state != PERF_EVENT_STATE_ACTIVE)  in __perf_event_enable()
3053 	ctx_resched(cpuctx, task_ctx, event->pmu_ctx->pmu, get_event_type(event));  in __perf_event_enable()
3057  * Enable an event.
3059  * If event->ctx is a cloned context, callers must make sure that
3060  * every task struct that event->ctx->task could possibly point to
3065 static void _perf_event_enable(struct perf_event *event)  in _perf_event_enable()  argument
3067 	struct perf_event_context *ctx = event->ctx;  in _perf_event_enable()
3070 	if (event->state >= PERF_EVENT_STATE_INACTIVE ||  in _perf_event_enable()
3071 	    event->state <  PERF_EVENT_STATE_ERROR) {  in _perf_event_enable()
3078 	 * If the event is in error state, clear that first.  in _perf_event_enable()
3080 	 * That way, if we see the event in error state below, we know that it  in _perf_event_enable()
3084 	if (event->state == PERF_EVENT_STATE_ERROR) {  in _perf_event_enable()
3088 		if (event->event_caps & PERF_EV_CAP_SIBLING &&  in _perf_event_enable()
3089 		    event->group_leader == event)  in _perf_event_enable()
3092 		event->state = PERF_EVENT_STATE_OFF;  in _perf_event_enable()
3096 	event_function_call(event, __perf_event_enable, NULL);  in _perf_event_enable()
3102 void perf_event_enable(struct perf_event *event)  in perf_event_enable()  argument
3106 	ctx = perf_event_ctx_lock(event);  in perf_event_enable()
3107 	_perf_event_enable(event);  in perf_event_enable()
3108 	perf_event_ctx_unlock(event, ctx);  in perf_event_enable()
3113 	struct perf_event	*event;  member
3120 	struct perf_event *event = sd->event;  in __perf_event_stop()  local
3123 	if (READ_ONCE(event->state) != PERF_EVENT_STATE_ACTIVE)  in __perf_event_stop()
3131 	 * so we need to check again lest we try to stop another CPU's event.  in __perf_event_stop()
3133 	if (READ_ONCE(event->oncpu) != smp_processor_id())  in __perf_event_stop()
3136 	event->pmu->stop(event, PERF_EF_UPDATE);  in __perf_event_stop()
3144 	 * Since this is happening on an event-local CPU, no trace is lost  in __perf_event_stop()
3148 		event->pmu->start(event, 0);  in __perf_event_stop()
3153 static int perf_event_stop(struct perf_event *event, int restart)  in perf_event_stop()  argument
3156 		.event		= event,  in perf_event_stop()
3162 		if (READ_ONCE(event->state) != PERF_EVENT_STATE_ACTIVE)  in perf_event_stop()
3169 		 * We only want to restart ACTIVE events, so if the event goes  in perf_event_stop()
3170 		 * inactive here (event->oncpu==-1), there's nothing more to do;  in perf_event_stop()
3173 		ret = cpu_function_call(READ_ONCE(event->oncpu),  in perf_event_stop()
3186  *	event::addr_filter_ranges array and bump the event::addr_filters_gen;
3187  * (p2) when an event is scheduled in (pmu::add), it calls
3191  * If (p1) happens while the event is active, we restart it to force (p2).
3202 void perf_event_addr_filters_sync(struct perf_event *event)  in perf_event_addr_filters_sync()  argument
3204 	struct perf_addr_filters_head *ifh = perf_event_addr_filters(event);  in perf_event_addr_filters_sync()
3206 	if (!has_addr_filter(event))  in perf_event_addr_filters_sync()
3210 	if (event->addr_filters_gen != event->hw.addr_filters_gen) {  in perf_event_addr_filters_sync()
3211 		event->pmu->addr_filters_sync(event);  in perf_event_addr_filters_sync()
3212 		event->hw.addr_filters_gen = event->addr_filters_gen;  in perf_event_addr_filters_sync()
3218 static int _perf_event_refresh(struct perf_event *event, int refresh)  in _perf_event_refresh()  argument
3223 	if (event->attr.inherit || !is_sampling_event(event))  in _perf_event_refresh()
3226 	atomic_add(refresh, &event->event_limit);  in _perf_event_refresh()
3227 	_perf_event_enable(event);  in _perf_event_refresh()
3235 int perf_event_refresh(struct perf_event *event, int refresh)  in perf_event_refresh()  argument
3240 	ctx = perf_event_ctx_lock(event);  in perf_event_refresh()
3241 	ret = _perf_event_refresh(event, refresh);  in perf_event_refresh()
3242 	perf_event_ctx_unlock(event, ctx);  in perf_event_refresh()
3264  * Copy event-type-independent attributes that may be modified.
3272 static int perf_event_modify_attr(struct perf_event *event,  in perf_event_modify_attr()  argument
3279 	if (event->attr.type != attr->type)  in perf_event_modify_attr()
3282 	switch (event->attr.type) {  in perf_event_modify_attr()
3291 	WARN_ON_ONCE(event->ctx->parent_ctx);  in perf_event_modify_attr()
3293 	mutex_lock(&event->child_mutex);  in perf_event_modify_attr()
3295 	 * Event-type-independent attributes must be copied before event-type  in perf_event_modify_attr()
3299 	perf_event_modify_copy_attr(&event->attr, attr);  in perf_event_modify_attr()
3300 	err = func(event, attr);  in perf_event_modify_attr()
3303 	list_for_each_entry(child, &event->child_list, child_list) {  in perf_event_modify_attr()
3310 	mutex_unlock(&event->child_mutex);  in perf_event_modify_attr()
3318 	struct perf_event *event, *tmp;  in __pmu_ctx_sched_out()  local
3334 		list_for_each_entry_safe(event, tmp,  in __pmu_ctx_sched_out()
3337 			group_sched_out(event, ctx);  in __pmu_ctx_sched_out()
3341 		list_for_each_entry_safe(event, tmp,  in __pmu_ctx_sched_out()
3344 			group_sched_out(event, ctx);  in __pmu_ctx_sched_out()
3466 static void __perf_event_sync_stat(struct perf_event *event,  in __perf_event_sync_stat()  argument
3471 	if (!event->attr.inherit_stat)  in __perf_event_sync_stat()
3475 	 * Update the event value, we cannot use perf_event_read()  in __perf_event_sync_stat()
3478 	 * we know the event must be on the current CPU, therefore we  in __perf_event_sync_stat()
3481 	if (event->state == PERF_EVENT_STATE_ACTIVE)  in __perf_event_sync_stat()
3482 		event->pmu->read(event);  in __perf_event_sync_stat()
3484 	perf_event_update_time(event);  in __perf_event_sync_stat()
3487 	 * In order to keep per-task stats reliable we need to flip the event  in __perf_event_sync_stat()
3491 	value = local64_xchg(&event->count, value);  in __perf_event_sync_stat()
3494 	swap(event->total_time_enabled, next_event->total_time_enabled);  in __perf_event_sync_stat()
3495 	swap(event->total_time_running, next_event->total_time_running);  in __perf_event_sync_stat()
3500 	perf_event_update_userpage(event);  in __perf_event_sync_stat()
3507 	struct perf_event *event, *next_event;  in perf_event_sync_stat()  local
3514 	event = list_first_entry(&ctx->event_list,  in perf_event_sync_stat()
3520 	while (&event->event_entry != &ctx->event_list &&  in perf_event_sync_stat()
3523 		__perf_event_sync_stat(event, next_event);  in perf_event_sync_stat()
3525 		event = list_next_entry(event, event_entry);  in perf_event_sync_stat()
3707  * This callback is relevant even to per-cpu events; for example multi event
3754  * We stop each event and update the event value in event->count.
3757  * sets the disabled bit in the control field of event _before_
3758  * accessing the event control register. If a NMI hits, then it will
3759  * not restart the event.
3775 	 * cgroup event are system-wide mode only  in __perf_event_task_sched_out()
3795 static void __heap_add(struct perf_event_min_heap *heap, struct perf_event *event)  in __heap_add()  argument
3799 	if (event) {  in __heap_add()
3800 		itrs[heap->nr] = event;  in __heap_add()
3827 	/* Space for per CPU and/or any CPU event iterators. */  in visit_groups_merge()
3891  * Because the userpage is strictly per-event (there is no concept of context,
3897 static inline bool event_update_userpage(struct perf_event *event)  in event_update_userpage()  argument
3899 	if (likely(!atomic_read(&event->mmap_count)))  in event_update_userpage()
3902 	perf_event_update_time(event);  in event_update_userpage()
3903 	perf_event_update_userpage(event);  in event_update_userpage()
3910 	struct perf_event *event;  in group_update_userpage()  local
3915 	for_each_sibling_event(event, group_event)  in group_update_userpage()
3916 		event_update_userpage(event);  in group_update_userpage()
3919 static int merge_sched_in(struct perf_event *event, void *data)  in merge_sched_in()  argument
3921 	struct perf_event_context *ctx = event->ctx;  in merge_sched_in()
3924 	if (event->state <= PERF_EVENT_STATE_OFF)  in merge_sched_in()
3927 	if (!event_filter_match(event))  in merge_sched_in()
3930 	if (group_can_go_on(event, *can_add_hw)) {  in merge_sched_in()
3931 		if (!group_sched_in(event, ctx))  in merge_sched_in()
3932 			list_add_tail(&event->active_list, get_event_list(event));  in merge_sched_in()
3935 	if (event->state == PERF_EVENT_STATE_INACTIVE) {  in merge_sched_in()
3937 		if (event->attr.pinned) {  in merge_sched_in()
3938 			perf_cgroup_event_disable(event, ctx);  in merge_sched_in()
3939 			perf_event_set_state(event, PERF_EVENT_STATE_ERROR);  in merge_sched_in()
3943 			event->pmu_ctx->rotate_necessary = 1;  in merge_sched_in()
3944 			cpc = this_cpu_ptr(event->pmu_ctx->pmu->cpu_pmu_context);  in merge_sched_in()
3946 			group_update_userpage(event);  in merge_sched_in()
4087  * We restore the event value and then enable it.
4090  * sets the enabled bit in the control field of event _before_
4091  * accessing the event control register. If a NMI hits, then it will
4092  * keep the event running.
4106 static u64 perf_calculate_period(struct perf_event *event, u64 nsec, u64 count)  in perf_calculate_period()  argument
4108 	u64 frequency = event->attr.sample_freq;  in perf_calculate_period()
4182 static void perf_adjust_period(struct perf_event *event, u64 nsec, u64 count, bool disable)  in perf_adjust_period()  argument
4184 	struct hw_perf_event *hwc = &event->hw;  in perf_adjust_period()
4188 	period = perf_calculate_period(event, nsec, count);  in perf_adjust_period()
4206 			event->pmu->stop(event, PERF_EF_UPDATE);  in perf_adjust_period()
4211 			event->pmu->start(event, PERF_EF_RELOAD);  in perf_adjust_period()
4217 	struct perf_event *event;  in perf_adjust_freq_unthr_events()  local
4222 	list_for_each_entry(event, event_list, active_list) {  in perf_adjust_freq_unthr_events()
4223 		if (event->state != PERF_EVENT_STATE_ACTIVE)  in perf_adjust_freq_unthr_events()
4227 		if (!event_filter_match(event))  in perf_adjust_freq_unthr_events()
4230 		hwc = &event->hw;  in perf_adjust_freq_unthr_events()
4234 			perf_log_throttle(event, 1);  in perf_adjust_freq_unthr_events()
4235 			if (!event->attr.freq || !event->attr.sample_freq)  in perf_adjust_freq_unthr_events()
4236 				event->pmu->start(event, 0);  in perf_adjust_freq_unthr_events()
4239 		if (!event->attr.freq || !event->attr.sample_freq)  in perf_adjust_freq_unthr_events()
4243 		 * stop the event and update event->count  in perf_adjust_freq_unthr_events()
4245 		event->pmu->stop(event, PERF_EF_UPDATE);  in perf_adjust_freq_unthr_events()
4247 		now = local64_read(&event->count);  in perf_adjust_freq_unthr_events()
4252 		 * restart the event  in perf_adjust_freq_unthr_events()
4254 		 * we have stopped the event so tell that  in perf_adjust_freq_unthr_events()
4259 			perf_adjust_period(event, period, delta, false);  in perf_adjust_freq_unthr_events()
4261 		event->pmu->start(event, delta > 0 ? PERF_EF_RELOAD : 0);  in perf_adjust_freq_unthr_events()
4303  * Move @event to the tail of the @ctx's elegible events.
4305 static void rotate_ctx(struct perf_event_context *ctx, struct perf_event *event)  in rotate_ctx()  argument
4314 	perf_event_groups_delete(&ctx->flexible_groups, event);  in rotate_ctx()
4315 	perf_event_groups_insert(&ctx->flexible_groups, event);  in rotate_ctx()
4318 /* pick an event from the flexible_groups to rotate */
4322 	struct perf_event *event;  in ctx_event_to_rotate()  local
4329 	/* pick the first active flexible event */  in ctx_event_to_rotate()
4330 	event = list_first_entry_or_null(&pmu_ctx->flexible_active,  in ctx_event_to_rotate()
4332 	if (event)  in ctx_event_to_rotate()
4335 	/* if no active flexible event, pick the first event */  in ctx_event_to_rotate()
4343 			event = __node_2_pe(node);  in ctx_event_to_rotate()
4350 		event = __node_2_pe(node);  in ctx_event_to_rotate()
4357 		event = __node_2_pe(node);  in ctx_event_to_rotate()
4366 	return event;  in ctx_event_to_rotate()
4379 	 * events, thus the event count values are stable.  in perf_rotate_context()
4449 static int event_enable_on_exec(struct perf_event *event,  in event_enable_on_exec()  argument
4452 	if (!event->attr.enable_on_exec)  in event_enable_on_exec()
4455 	event->attr.enable_on_exec = 0;  in event_enable_on_exec()
4456 	if (event->state >= PERF_EVENT_STATE_INACTIVE)  in event_enable_on_exec()
4459 	perf_event_set_state(event, PERF_EVENT_STATE_INACTIVE);  in event_enable_on_exec()
4473 	struct perf_event *event;  in perf_event_enable_on_exec()  local
4488 	list_for_each_entry(event, &ctx->event_list, event_entry) {  in perf_event_enable_on_exec()
4489 		enabled |= event_enable_on_exec(event, ctx);  in perf_event_enable_on_exec()
4490 		event_type |= get_event_type(event);  in perf_event_enable_on_exec()
4494 	 * Unclone and reschedule this context if we enabled any event.  in perf_event_enable_on_exec()
4509 static void perf_remove_from_owner(struct perf_event *event);
4510 static void perf_event_exit_event(struct perf_event *event,
4520 	struct perf_event *event, *next;  in perf_event_remove_on_exec()  local
4529 	list_for_each_entry_safe(event, next, &ctx->event_list, event_entry) {  in perf_event_remove_on_exec()
4530 		if (!event->attr.remove_on_exec)  in perf_event_remove_on_exec()
4533 		if (!is_kernel_event(event))  in perf_event_remove_on_exec()
4534 			perf_remove_from_owner(event);  in perf_event_remove_on_exec()
4538 		perf_event_exit_event(event, ctx);  in perf_event_remove_on_exec()
4554 	struct perf_event *event;  member
4561 static int __perf_event_read_cpu(struct perf_event *event, int event_cpu)  in __perf_event_read_cpu()  argument
4569 	if (event->group_caps & PERF_EV_CAP_READ_SCOPE) {  in __perf_event_read_cpu()
4570 		const struct cpumask *cpumask = perf_scope_cpu_topology_cpumask(event->pmu->scope, event_cpu);  in __perf_event_read_cpu()
4576 	if (event->group_caps & PERF_EV_CAP_READ_ACTIVE_PKG) {  in __perf_event_read_cpu()
4588  * Cross CPU call to read the hardware event
4593 	struct perf_event *sub, *event = data->event;  in __perf_event_read()  local
4594 	struct perf_event_context *ctx = event->ctx;  in __perf_event_read()
4596 	struct pmu *pmu = event->pmu;  in __perf_event_read()
4602 	 * event->count would have been updated to a recent sample  in __perf_event_read()
4603 	 * when the event was scheduled out.  in __perf_event_read()
4609 	ctx_time_update_event(ctx, event);  in __perf_event_read()
4611 	perf_event_update_time(event);  in __perf_event_read()
4613 		perf_event_update_sibling_time(event);  in __perf_event_read()
4615 	if (event->state != PERF_EVENT_STATE_ACTIVE)  in __perf_event_read()
4619 		pmu->read(event);  in __perf_event_read()
4626 	pmu->read(event);  in __perf_event_read()
4628 	for_each_sibling_event(sub, event) {  in __perf_event_read()
4631 			 * Use sibling's PMU rather than @event's since  in __perf_event_read()
4644 static inline u64 perf_event_count(struct perf_event *event, bool self)  in perf_event_count()  argument
4647 		return local64_read(&event->count);  in perf_event_count()
4649 	return local64_read(&event->count) + atomic64_read(&event->child_count);  in perf_event_count()
4652 static void calc_timer_values(struct perf_event *event,  in calc_timer_values()  argument
4660 	ctx_time = perf_event_time_now(event, *now);  in calc_timer_values()
4661 	__perf_update_times(event, ctx_time, enabled, running);  in calc_timer_values()
4665  * NMI-safe method to read a local event, that is an event that
4672 int perf_event_read_local(struct perf_event *event, u64 *value,  in perf_event_read_local()  argument
4687 	 * It must not be an event with inherit set, we cannot read  in perf_event_read_local()
4690 	if (event->attr.inherit) {  in perf_event_read_local()
4695 	/* If this is a per-task event, it must be for current */  in perf_event_read_local()
4696 	if ((event->attach_state & PERF_ATTACH_TASK) &&  in perf_event_read_local()
4697 	    event->hw.target != current) {  in perf_event_read_local()
4703 	 * Get the event CPU numbers, and adjust them to local if the event is  in perf_event_read_local()
4704 	 * a per-package event that can be read locally  in perf_event_read_local()
4706 	event_oncpu = __perf_event_read_cpu(event, event->oncpu);  in perf_event_read_local()
4707 	event_cpu = __perf_event_read_cpu(event, event->cpu);  in perf_event_read_local()
4709 	/* If this is a per-CPU event, it must be for this CPU */  in perf_event_read_local()
4710 	if (!(event->attach_state & PERF_ATTACH_TASK) &&  in perf_event_read_local()
4716 	/* If this is a pinned event it must be running on this CPU */  in perf_event_read_local()
4717 	if (event->attr.pinned && event_oncpu != smp_processor_id()) {  in perf_event_read_local()
4723 	 * If the event is currently on this CPU, its either a per-task event,  in perf_event_read_local()
4728 		event->pmu->read(event);  in perf_event_read_local()
4730 	*value = local64_read(&event->count);  in perf_event_read_local()
4734 		calc_timer_values(event, &__now, &__enabled, &__running);  in perf_event_read_local()
4746 static int perf_event_read(struct perf_event *event, bool group)  in perf_event_read()  argument
4748 	enum perf_event_state state = READ_ONCE(event->state);  in perf_event_read()
4752 	 * If event is enabled and currently active on a CPU, update the  in perf_event_read()
4753 	 * value in the event structure:  in perf_event_read()
4767 		event_cpu = READ_ONCE(event->oncpu);  in perf_event_read()
4772 			.event = event,  in perf_event_read()
4778 		event_cpu = __perf_event_read_cpu(event, event_cpu);  in perf_event_read()
4784 		 * If event_cpu isn't a valid CPU it means the event got  in perf_event_read()
4785 		 * scheduled out and that will have updated the event count.  in perf_event_read()
4787 		 * Therefore, either way, we'll have an up-to-date event count  in perf_event_read()
4795 		struct perf_event_context *ctx = event->ctx;  in perf_event_read()
4799 		state = event->state;  in perf_event_read()
4809 		ctx_time_update_event(ctx, event);  in perf_event_read()
4811 		perf_event_update_time(event);  in perf_event_read()
4813 			perf_event_update_sibling_time(event);  in perf_event_read()
4884 find_get_context(struct task_struct *task, struct perf_event *event)  in find_get_context()  argument
4892 		/* Must be root to operate on a CPU event: */  in find_get_context()
4893 		err = perf_allow_cpu(&event->attr);  in find_get_context()
4897 		cpuctx = per_cpu_ptr(&perf_cpu_context, event->cpu);  in find_get_context()
4958 		     struct perf_event *event)  in find_get_pmu_context()  argument
4971 		cpc = per_cpu_ptr(pmu->cpu_pmu_context, event->cpu);  in find_get_pmu_context()
4991 	if (event->attach_state & PERF_ATTACH_TASK_DATA) {  in find_get_pmu_context()
5091 static void perf_event_free_filter(struct perf_event *event);
5095 	struct perf_event *event = container_of(head, typeof(*event), rcu_head);  in free_event_rcu()  local
5097 	if (event->ns)  in free_event_rcu()
5098 		put_pid_ns(event->ns);  in free_event_rcu()
5099 	perf_event_free_filter(event);  in free_event_rcu()
5100 	kmem_cache_free(perf_event_cache, event);  in free_event_rcu()
5103 static void ring_buffer_attach(struct perf_event *event,
5106 static void detach_sb_event(struct perf_event *event)  in detach_sb_event()  argument
5108 	struct pmu_event_list *pel = per_cpu_ptr(&pmu_sb_events, event->cpu);  in detach_sb_event()
5111 	list_del_rcu(&event->sb_list);  in detach_sb_event()
5115 static bool is_sb_event(struct perf_event *event)  in is_sb_event()  argument
5117 	struct perf_event_attr *attr = &event->attr;  in is_sb_event()
5119 	if (event->parent)  in is_sb_event()
5122 	if (event->attach_state & PERF_ATTACH_TASK)  in is_sb_event()
5134 static void unaccount_pmu_sb_event(struct perf_event *event)  in unaccount_pmu_sb_event()  argument
5136 	if (is_sb_event(event))  in unaccount_pmu_sb_event()
5137 		detach_sb_event(event);  in unaccount_pmu_sb_event()
5162 static void unaccount_event(struct perf_event *event)  in unaccount_event()  argument
5166 	if (event->parent)  in unaccount_event()
5169 	if (event->attach_state & (PERF_ATTACH_TASK | PERF_ATTACH_SCHED_CB))  in unaccount_event()
5171 	if (event->attr.mmap || event->attr.mmap_data)  in unaccount_event()
5173 	if (event->attr.build_id)  in unaccount_event()
5175 	if (event->attr.comm)  in unaccount_event()
5177 	if (event->attr.namespaces)  in unaccount_event()
5179 	if (event->attr.cgroup)  in unaccount_event()
5181 	if (event->attr.task)  in unaccount_event()
5183 	if (event->attr.freq)  in unaccount_event()
5185 	if (event->attr.context_switch) {  in unaccount_event()
5189 	if (is_cgroup_event(event))  in unaccount_event()
5191 	if (has_branch_stack(event))  in unaccount_event()
5193 	if (event->attr.ksymbol)  in unaccount_event()
5195 	if (event->attr.bpf_event)  in unaccount_event()
5197 	if (event->attr.text_poke)  in unaccount_event()
5205 	unaccount_pmu_sb_event(event);  in unaccount_event()
5218  * (PERF_PMU_CAP_EXCLUSIVE). Such pmus can only have one event scheduled
5228 static int exclusive_event_init(struct perf_event *event)  in exclusive_event_init()  argument
5230 	struct pmu *pmu = event->pmu;  in exclusive_event_init()
5243 	 * Since this is called in perf_event_alloc() path, event::ctx  in exclusive_event_init()
5245 	 * to mean "per-task event", because unlike other attach states it  in exclusive_event_init()
5248 	if (event->attach_state & PERF_ATTACH_TASK) {  in exclusive_event_init()
5256 	event->attach_state |= PERF_ATTACH_EXCLUSIVE;  in exclusive_event_init()
5261 static void exclusive_event_destroy(struct perf_event *event)  in exclusive_event_destroy()  argument
5263 	struct pmu *pmu = event->pmu;  in exclusive_event_destroy()
5266 	if (event->attach_state & PERF_ATTACH_TASK)  in exclusive_event_destroy()
5271 	event->attach_state &= ~PERF_ATTACH_EXCLUSIVE;  in exclusive_event_destroy()
5284 static bool exclusive_event_installable(struct perf_event *event,  in exclusive_event_installable()  argument
5288 	struct pmu *pmu = event->pmu;  in exclusive_event_installable()
5296 		if (exclusive_event_match(iter_event, event))  in exclusive_event_installable()
5303 static void perf_addr_filters_splice(struct perf_event *event,
5307 static void __free_event(struct perf_event *event)  in __free_event()  argument
5309 	if (event->attach_state & PERF_ATTACH_CALLCHAIN)  in __free_event()
5312 	kfree(event->addr_filter_ranges);  in __free_event()
5314 	if (event->attach_state & PERF_ATTACH_EXCLUSIVE)  in __free_event()
5315 		exclusive_event_destroy(event);  in __free_event()
5317 	if (is_cgroup_event(event))  in __free_event()
5318 		perf_detach_cgroup(event);  in __free_event()
5320 	if (event->destroy)  in __free_event()
5321 		event->destroy(event);  in __free_event()
5327 	if (event->hw.target)  in __free_event()
5328 		put_task_struct(event->hw.target);  in __free_event()
5330 	if (event->pmu_ctx) {  in __free_event()
5332 		 * put_pmu_ctx() needs an event->ctx reference, because of  in __free_event()
5335 		WARN_ON_ONCE(!event->ctx);  in __free_event()
5336 		WARN_ON_ONCE(event->pmu_ctx->ctx != event->ctx);  in __free_event()
5337 		put_pmu_ctx(event->pmu_ctx);  in __free_event()
5344 	if (event->ctx)  in __free_event()
5345 		put_ctx(event->ctx);  in __free_event()
5347 	if (event->pmu)  in __free_event()
5348 		module_put(event->pmu->module);  in __free_event()
5350 	call_rcu(&event->rcu_head, free_event_rcu);  in __free_event()
5354 static void _free_event(struct perf_event *event)  in _free_event()  argument
5356 	irq_work_sync(&event->pending_irq);  in _free_event()
5357 	irq_work_sync(&event->pending_disable_irq);  in _free_event()
5359 	unaccount_event(event);  in _free_event()
5361 	security_perf_event_free(event);  in _free_event()
5363 	if (event->rb) {  in _free_event()
5365 		 * Can happen when we close an event with re-directed output.  in _free_event()
5370 		mutex_lock(&event->mmap_mutex);  in _free_event()
5371 		ring_buffer_attach(event, NULL);  in _free_event()
5372 		mutex_unlock(&event->mmap_mutex);  in _free_event()
5375 	perf_event_free_bpf_prog(event);  in _free_event()
5376 	perf_addr_filters_splice(event, NULL);  in _free_event()
5378 	__free_event(event);  in _free_event()
5383  * where the event isn't exposed yet and inherited events.
5385 static void free_event(struct perf_event *event)  in free_event()  argument
5387 	if (WARN(atomic_long_cmpxchg(&event->refcount, 1, 0) != 1,  in free_event()
5388 				"unexpected event refcount: %ld; ptr=%p\n",  in free_event()
5389 				atomic_long_read(&event->refcount), event)) {  in free_event()
5394 	_free_event(event);  in free_event()
5398  * Remove user event from the owner task.
5400 static void perf_remove_from_owner(struct perf_event *event)  in perf_remove_from_owner()  argument
5408 	 * indeed free this event, otherwise we need to serialize on  in perf_remove_from_owner()
5411 	owner = READ_ONCE(event->owner);  in perf_remove_from_owner()
5434 		 * We have to re-check the event->owner field, if it is cleared  in perf_remove_from_owner()
5437 		 * event.  in perf_remove_from_owner()
5439 		if (event->owner) {  in perf_remove_from_owner()
5440 			list_del_init(&event->owner_entry);  in perf_remove_from_owner()
5441 			smp_store_release(&event->owner, NULL);  in perf_remove_from_owner()
5448 static void put_event(struct perf_event *event)  in put_event()  argument
5452 	if (!atomic_long_dec_and_test(&event->refcount))  in put_event()
5455 	parent = event->parent;  in put_event()
5456 	_free_event(event);  in put_event()
5464  * Kill an event dead; while event:refcount will preserve the event
5468 int perf_event_release_kernel(struct perf_event *event)  in perf_event_release_kernel()  argument
5470 	struct perf_event_context *ctx = event->ctx;  in perf_event_release_kernel()
5475 	 * If we got here through err_alloc: free_event(event); we will not  in perf_event_release_kernel()
5479 		WARN_ON_ONCE(event->attach_state &  in perf_event_release_kernel()
5484 	if (!is_kernel_event(event))  in perf_event_release_kernel()
5485 		perf_remove_from_owner(event);  in perf_event_release_kernel()
5487 	ctx = perf_event_ctx_lock(event);  in perf_event_release_kernel()
5491 	 * Mark this event as STATE_DEAD, there is no external reference to it  in perf_event_release_kernel()
5494 	 * Anybody acquiring event->child_mutex after the below loop _must_  in perf_event_release_kernel()
5501 	perf_remove_from_context(event, DETACH_GROUP|DETACH_DEAD);  in perf_event_release_kernel()
5503 	perf_event_ctx_unlock(event, ctx);  in perf_event_release_kernel()
5506 	mutex_lock(&event->child_mutex);  in perf_event_release_kernel()
5507 	list_for_each_entry(child, &event->child_list, child_list) {  in perf_event_release_kernel()
5519 		 * Since the event cannot get freed while we hold the  in perf_event_release_kernel()
5530 		mutex_unlock(&event->child_mutex);  in perf_event_release_kernel()
5532 		mutex_lock(&event->child_mutex);  in perf_event_release_kernel()
5539 		tmp = list_first_entry_or_null(&event->child_list,  in perf_event_release_kernel()
5548 		mutex_unlock(&event->child_mutex);  in perf_event_release_kernel()
5563 	mutex_unlock(&event->child_mutex);  in perf_event_release_kernel()
5573 		 * Wake any perf_event_free_task() waiting for this event to be  in perf_event_release_kernel()
5582 	 * Last reference unless ->pending_task work is pending on this event  in perf_event_release_kernel()
5585 	put_event(event);  in perf_event_release_kernel()
5599 static u64 __perf_event_read_value(struct perf_event *event, u64 *enabled, u64 *running)  in __perf_event_read_value()  argument
5607 	mutex_lock(&event->child_mutex);  in __perf_event_read_value()
5609 	(void)perf_event_read(event, false);  in __perf_event_read_value()
5610 	total += perf_event_count(event, false);  in __perf_event_read_value()
5612 	*enabled += event->total_time_enabled +  in __perf_event_read_value()
5613 			atomic64_read(&event->child_total_time_enabled);  in __perf_event_read_value()
5614 	*running += event->total_time_running +  in __perf_event_read_value()
5615 			atomic64_read(&event->child_total_time_running);  in __perf_event_read_value()
5617 	list_for_each_entry(child, &event->child_list, child_list) {  in __perf_event_read_value()
5623 	mutex_unlock(&event->child_mutex);  in __perf_event_read_value()
5628 u64 perf_event_read_value(struct perf_event *event, u64 *enabled, u64 *running)  in perf_event_read_value()  argument
5633 	ctx = perf_event_ctx_lock(event);  in perf_event_read_value()
5634 	count = __perf_event_read_value(event, enabled, running);  in perf_event_read_value()
5635 	perf_event_ctx_unlock(event, ctx);  in perf_event_read_value()
5720 static int perf_read_group(struct perf_event *event,  in perf_read_group()  argument
5723 	struct perf_event *leader = event->group_leader, *child;  in perf_read_group()
5730 	values = kzalloc(event->read_size, GFP_KERNEL);  in perf_read_group()
5750 	ret = event->read_size;  in perf_read_group()
5751 	if (copy_to_user(buf, values, event->read_size))  in perf_read_group()
5762 static int perf_read_one(struct perf_event *event,  in perf_read_one()  argument
5769 	values[n++] = __perf_event_read_value(event, &enabled, &running);  in perf_read_one()
5775 		values[n++] = primary_event_id(event);  in perf_read_one()
5777 		values[n++] = atomic64_read(&event->lost_samples);  in perf_read_one()
5785 static bool is_event_hup(struct perf_event *event)  in is_event_hup()  argument
5789 	if (event->state > PERF_EVENT_STATE_EXIT)  in is_event_hup()
5792 	mutex_lock(&event->child_mutex);  in is_event_hup()
5793 	no_children = list_empty(&event->child_list);  in is_event_hup()
5794 	mutex_unlock(&event->child_mutex);  in is_event_hup()
5799  * Read the performance event - simple non blocking version for now
5802 __perf_read(struct perf_event *event, char __user *buf, size_t count)  in __perf_read()  argument
5804 	u64 read_format = event->attr.read_format;  in __perf_read()
5808 	 * Return end-of-file for a read on an event that is in  in __perf_read()
5812 	if (event->state == PERF_EVENT_STATE_ERROR)  in __perf_read()
5815 	if (count < event->read_size)  in __perf_read()
5818 	WARN_ON_ONCE(event->ctx->parent_ctx);  in __perf_read()
5820 		ret = perf_read_group(event, read_format, buf);  in __perf_read()
5822 		ret = perf_read_one(event, read_format, buf);  in __perf_read()
5830 	struct perf_event *event = file->private_data;  in perf_read()  local
5834 	ret = security_perf_event_read(event);  in perf_read()
5838 	ctx = perf_event_ctx_lock(event);  in perf_read()
5839 	ret = __perf_read(event, buf, count);  in perf_read()
5840 	perf_event_ctx_unlock(event, ctx);  in perf_read()
5847 	struct perf_event *event = file->private_data;  in perf_poll()  local
5851 	poll_wait(file, &event->waitq, wait);  in perf_poll()
5853 	if (is_event_hup(event))  in perf_poll()
5857 	 * Pin the event->rb by taking event->mmap_mutex; otherwise  in perf_poll()
5860 	mutex_lock(&event->mmap_mutex);  in perf_poll()
5861 	rb = event->rb;  in perf_poll()
5864 	mutex_unlock(&event->mmap_mutex);  in perf_poll()
5868 static void _perf_event_reset(struct perf_event *event)  in _perf_event_reset()  argument
5870 	(void)perf_event_read(event, false);  in _perf_event_reset()
5871 	local64_set(&event->count, 0);  in _perf_event_reset()
5872 	perf_event_update_userpage(event);  in _perf_event_reset()
5875 /* Assume it's not an event with inherit set. */
5876 u64 perf_event_pause(struct perf_event *event, bool reset)  in perf_event_pause()  argument
5881 	ctx = perf_event_ctx_lock(event);  in perf_event_pause()
5882 	WARN_ON_ONCE(event->attr.inherit);  in perf_event_pause()
5883 	_perf_event_disable(event);  in perf_event_pause()
5884 	count = local64_read(&event->count);  in perf_event_pause()
5886 		local64_set(&event->count, 0);  in perf_event_pause()
5887 	perf_event_ctx_unlock(event, ctx);  in perf_event_pause()
5894  * Holding the top-level event's child_mutex means that any
5895  * descendant process that has inherited this event will block
5899 static void perf_event_for_each_child(struct perf_event *event,  in perf_event_for_each_child()  argument
5904 	WARN_ON_ONCE(event->ctx->parent_ctx);  in perf_event_for_each_child()
5906 	mutex_lock(&event->child_mutex);  in perf_event_for_each_child()
5907 	func(event);  in perf_event_for_each_child()
5908 	list_for_each_entry(child, &event->child_list, child_list)  in perf_event_for_each_child()
5910 	mutex_unlock(&event->child_mutex);  in perf_event_for_each_child()
5913 static void perf_event_for_each(struct perf_event *event,  in perf_event_for_each()  argument
5916 	struct perf_event_context *ctx = event->ctx;  in perf_event_for_each()
5921 	event = event->group_leader;  in perf_event_for_each()
5923 	perf_event_for_each_child(event, func);  in perf_event_for_each()
5924 	for_each_sibling_event(sibling, event)  in perf_event_for_each()
5928 static void __perf_event_period(struct perf_event *event,  in __perf_event_period()  argument
5936 	if (event->attr.freq) {  in __perf_event_period()
5937 		event->attr.sample_freq = value;  in __perf_event_period()
5939 		event->attr.sample_period = value;  in __perf_event_period()
5940 		event->hw.sample_period = value;  in __perf_event_period()
5943 	active = (event->state == PERF_EVENT_STATE_ACTIVE);  in __perf_event_period()
5945 		perf_pmu_disable(event->pmu);  in __perf_event_period()
5948 		 * trying to unthrottle while we already re-started the event.  in __perf_event_period()
5950 		if (event->hw.interrupts == MAX_INTERRUPTS) {  in __perf_event_period()
5951 			event->hw.interrupts = 0;  in __perf_event_period()
5952 			perf_log_throttle(event, 1);  in __perf_event_period()
5954 		event->pmu->stop(event, PERF_EF_UPDATE);  in __perf_event_period()
5957 	local64_set(&event->hw.period_left, 0);  in __perf_event_period()
5960 		event->pmu->start(event, PERF_EF_RELOAD);  in __perf_event_period()
5961 		perf_pmu_enable(event->pmu);  in __perf_event_period()
5965 static int perf_event_check_period(struct perf_event *event, u64 value)  in perf_event_check_period()  argument
5967 	return event->pmu->check_period(event, value);  in perf_event_check_period()
5970 static int _perf_event_period(struct perf_event *event, u64 value)  in _perf_event_period()  argument
5972 	if (!is_sampling_event(event))  in _perf_event_period()
5978 	if (event->attr.freq) {  in _perf_event_period()
5982 		if (perf_event_check_period(event, value))  in _perf_event_period()
5988 	event_function_call(event, __perf_event_period, &value);  in _perf_event_period()
5993 int perf_event_period(struct perf_event *event, u64 value)  in perf_event_period()  argument
5998 	ctx = perf_event_ctx_lock(event);  in perf_event_period()
5999 	ret = _perf_event_period(event, value);  in perf_event_period()
6000 	perf_event_ctx_unlock(event, ctx);  in perf_event_period()
6013 static int perf_event_set_output(struct perf_event *event,
6015 static int perf_event_set_filter(struct perf_event *event, void __user *arg);
6019 static long _perf_ioctl(struct perf_event *event, unsigned int cmd, unsigned long arg)  in _perf_ioctl()  argument
6036 		return _perf_event_refresh(event, arg);  in _perf_ioctl()
6045 		return _perf_event_period(event, value);  in _perf_ioctl()
6049 		u64 id = primary_event_id(event);  in _perf_ioctl()
6065 		return perf_event_set_output(event, output_event);  in _perf_ioctl()
6069 		return perf_event_set_filter(event, (void __user *)arg);  in _perf_ioctl()
6080 		err = perf_event_set_bpf_prog(event, prog, 0);  in _perf_ioctl()
6093 		rb = rcu_dereference(event->rb);  in _perf_ioctl()
6104 		return perf_event_query_prog_array(event, (void __user *)arg);  in _perf_ioctl()
6114 		return perf_event_modify_attr(event,  &new_attr);  in _perf_ioctl()
6121 		perf_event_for_each(event, func);  in _perf_ioctl()
6123 		perf_event_for_each_child(event, func);  in _perf_ioctl()
6130 	struct perf_event *event = file->private_data;  in perf_ioctl()  local
6135 	ret = security_perf_event_write(event);  in perf_ioctl()
6139 	ctx = perf_event_ctx_lock(event);  in perf_ioctl()
6140 	ret = _perf_ioctl(event, cmd, arg);  in perf_ioctl()
6141 	perf_event_ctx_unlock(event, ctx);  in perf_ioctl()
6171 	struct perf_event *event;  in perf_event_task_enable()  local
6174 	list_for_each_entry(event, &current->perf_event_list, owner_entry) {  in perf_event_task_enable()
6175 		ctx = perf_event_ctx_lock(event);  in perf_event_task_enable()
6176 		perf_event_for_each_child(event, _perf_event_enable);  in perf_event_task_enable()
6177 		perf_event_ctx_unlock(event, ctx);  in perf_event_task_enable()
6187 	struct perf_event *event;  in perf_event_task_disable()  local
6190 	list_for_each_entry(event, &current->perf_event_list, owner_entry) {  in perf_event_task_disable()
6191 		ctx = perf_event_ctx_lock(event);  in perf_event_task_disable()
6192 		perf_event_for_each_child(event, _perf_event_disable);  in perf_event_task_disable()
6193 		perf_event_ctx_unlock(event, ctx);  in perf_event_task_disable()
6200 static int perf_event_index(struct perf_event *event)  in perf_event_index()  argument
6202 	if (event->hw.state & PERF_HES_STOPPED)  in perf_event_index()
6205 	if (event->state != PERF_EVENT_STATE_ACTIVE)  in perf_event_index()
6208 	return event->pmu->event_idx(event);  in perf_event_index()
6211 static void perf_event_init_userpage(struct perf_event *event)  in perf_event_init_userpage()  argument
6217 	rb = rcu_dereference(event->rb);  in perf_event_init_userpage()
6234 	struct perf_event *event, struct perf_event_mmap_page *userpg, u64 now)  in arch_perf_update_userpage()  argument
6243 void perf_event_update_userpage(struct perf_event *event)  in perf_event_update_userpage()  argument
6250 	rb = rcu_dereference(event->rb);  in perf_event_update_userpage()
6256 	 * based on snapshot values taken when the event  in perf_event_update_userpage()
6263 	calc_timer_values(event, &now, &enabled, &running);  in perf_event_update_userpage()
6273 	userpg->index = perf_event_index(event);  in perf_event_update_userpage()
6274 	userpg->offset = perf_event_count(event, false);  in perf_event_update_userpage()
6276 		userpg->offset -= local64_read(&event->hw.prev_count);  in perf_event_update_userpage()
6279 			atomic64_read(&event->child_total_time_enabled);  in perf_event_update_userpage()
6282 			atomic64_read(&event->child_total_time_running);  in perf_event_update_userpage()
6284 	arch_perf_update_userpage(event, userpg, now);  in perf_event_update_userpage()
6294 static void ring_buffer_attach(struct perf_event *event,  in ring_buffer_attach()  argument
6300 	WARN_ON_ONCE(event->parent);  in ring_buffer_attach()
6302 	if (event->rb) {  in ring_buffer_attach()
6305 		 * event->rb_entry and wait/clear when adding event->rb_entry.  in ring_buffer_attach()
6307 		WARN_ON_ONCE(event->rcu_pending);  in ring_buffer_attach()
6309 		old_rb = event->rb;  in ring_buffer_attach()
6311 		list_del_rcu(&event->rb_entry);  in ring_buffer_attach()
6314 		event->rcu_batches = get_state_synchronize_rcu();  in ring_buffer_attach()
6315 		event->rcu_pending = 1;  in ring_buffer_attach()
6319 		if (event->rcu_pending) {  in ring_buffer_attach()
6320 			cond_synchronize_rcu(event->rcu_batches);  in ring_buffer_attach()
6321 			event->rcu_pending = 0;  in ring_buffer_attach()
6325 		list_add_rcu(&event->rb_entry, &rb->event_list);  in ring_buffer_attach()
6330 	 * Avoid racing with perf_mmap_close(AUX): stop the event  in ring_buffer_attach()
6331 	 * before swizzling the event::rb pointer; if it's getting  in ring_buffer_attach()
6339 	if (has_aux(event))  in ring_buffer_attach()
6340 		perf_event_stop(event, 0);  in ring_buffer_attach()
6342 	rcu_assign_pointer(event->rb, rb);  in ring_buffer_attach()
6351 		wake_up_all(&event->waitq);  in ring_buffer_attach()
6355 static void ring_buffer_wakeup(struct perf_event *event)  in ring_buffer_wakeup()  argument
6359 	if (event->parent)  in ring_buffer_wakeup()
6360 		event = event->parent;  in ring_buffer_wakeup()
6363 	rb = rcu_dereference(event->rb);  in ring_buffer_wakeup()
6365 		list_for_each_entry_rcu(event, &rb->event_list, rb_entry)  in ring_buffer_wakeup()
6366 			wake_up_all(&event->waitq);  in ring_buffer_wakeup()
6371 struct perf_buffer *ring_buffer_get(struct perf_event *event)  in ring_buffer_get()  argument
6375 	if (event->parent)  in ring_buffer_get()
6376 		event = event->parent;  in ring_buffer_get()
6379 	rb = rcu_dereference(event->rb);  in ring_buffer_get()
6401 	struct perf_event *event = vma->vm_file->private_data;  in perf_mmap_open()  local
6403 	atomic_inc(&event->mmap_count);  in perf_mmap_open()
6404 	atomic_inc(&event->rb->mmap_count);  in perf_mmap_open()
6407 		atomic_inc(&event->rb->aux_mmap_count);  in perf_mmap_open()
6409 	if (event->pmu->event_mapped)  in perf_mmap_open()
6410 		event->pmu->event_mapped(event, vma->vm_mm);  in perf_mmap_open()
6413 static void perf_pmu_output_stop(struct perf_event *event);
6417  * event, or through other events by use of perf_event_set_output().
6425 	struct perf_event *event = vma->vm_file->private_data;  in perf_mmap_close()  local
6426 	struct perf_buffer *rb = ring_buffer_get(event);  in perf_mmap_close()
6432 	if (event->pmu->event_unmapped)  in perf_mmap_close()
6433 		event->pmu->event_unmapped(event, vma->vm_mm);  in perf_mmap_close()
6447 		perf_pmu_output_stop(event);  in perf_mmap_close()
6463 	if (!atomic_dec_and_mutex_lock(&event->mmap_count, &event->mmap_mutex))  in perf_mmap_close()
6466 	ring_buffer_attach(event, NULL);  in perf_mmap_close()
6467 	mutex_unlock(&event->mmap_mutex);  in perf_mmap_close()
6480 	list_for_each_entry_rcu(event, &rb->event_list, rb_entry) {  in perf_mmap_close()
6481 		if (!atomic_long_inc_not_zero(&event->refcount)) {  in perf_mmap_close()
6483 			 * This event is en-route to free_event() which will  in perf_mmap_close()
6490 		mutex_lock(&event->mmap_mutex);  in perf_mmap_close()
6496 		 * If we find a different rb; ignore this event, a next  in perf_mmap_close()
6501 		if (event->rb == rb)  in perf_mmap_close()
6502 			ring_buffer_attach(event, NULL);  in perf_mmap_close()
6504 		mutex_unlock(&event->mmap_mutex);  in perf_mmap_close()
6505 		put_event(event);  in perf_mmap_close()
6616 	struct perf_event *event = file->private_data;  in perf_mmap()  local
6632 	if (event->cpu == -1 && event->attr.inherit)  in perf_mmap()
6638 	ret = security_perf_event_read(event);  in perf_mmap()
6654 		if (!event->rb)  in perf_mmap()
6661 		mutex_lock(&event->mmap_mutex);  in perf_mmap()
6664 		rb = event->rb;  in perf_mmap()
6719 	WARN_ON_ONCE(event->ctx->parent_ctx);  in perf_mmap()
6721 	mutex_lock(&event->mmap_mutex);  in perf_mmap()
6722 	if (event->rb) {  in perf_mmap()
6723 		if (data_page_nr(event->rb) != nr_pages) {  in perf_mmap()
6728 		if (!atomic_inc_not_zero(&event->rb->mmap_count)) {  in perf_mmap()
6731 			 * event and try again.  in perf_mmap()
6733 			ring_buffer_attach(event, NULL);  in perf_mmap()
6734 			mutex_unlock(&event->mmap_mutex);  in perf_mmap()
6739 		rb = event->rb;  in perf_mmap()
6782 	WARN_ON(!rb && event->rb);  in perf_mmap()
6789 			      event->attr.watermark ? event->attr.wakeup_watermark : 0,  in perf_mmap()
6790 			      event->cpu, flags);  in perf_mmap()
6801 		ring_buffer_attach(event, rb);  in perf_mmap()
6803 		perf_event_update_time(event);  in perf_mmap()
6804 		perf_event_init_userpage(event);  in perf_mmap()
6805 		perf_event_update_userpage(event);  in perf_mmap()
6807 		ret = rb_alloc_aux(rb, event, vma->vm_pgoff, nr_pages,  in perf_mmap()
6808 				   event->attr.aux_watermark, flags);  in perf_mmap()
6818 		atomic_inc(&event->mmap_count);  in perf_mmap()
6825 	mutex_unlock(&event->mmap_mutex);  in perf_mmap()
6837 	if (event->pmu->event_mapped)  in perf_mmap()
6838 		event->pmu->event_mapped(event, vma->vm_mm);  in perf_mmap()
6846 	struct perf_event *event = filp->private_data;  in perf_fasync()  local
6850 	retval = fasync_helper(fd, filp, on, &event->fasync);  in perf_fasync()
6870  * Perf event wakeup
6876 void perf_event_wakeup(struct perf_event *event)  in perf_event_wakeup()  argument
6878 	ring_buffer_wakeup(event);  in perf_event_wakeup()
6880 	if (event->pending_kill) {  in perf_event_wakeup()
6881 		kill_fasync(perf_event_fasync(event), SIGIO, event->pending_kill);  in perf_event_wakeup()
6882 		event->pending_kill = 0;  in perf_event_wakeup()
6886 static void perf_sigtrap(struct perf_event *event)  in perf_sigtrap()  argument
6893 	if (WARN_ON_ONCE(event->ctx->task != current))  in perf_sigtrap()
6903 	send_sig_perf((void __user *)event->pending_addr,  in perf_sigtrap()
6904 		      event->orig_type, event->attr.sig_data);  in perf_sigtrap()
6908  * Deliver the pending work in-event-context or follow the context.
6910 static void __perf_pending_disable(struct perf_event *event)  in __perf_pending_disable()  argument
6912 	int cpu = READ_ONCE(event->oncpu);  in __perf_pending_disable()
6915 	 * If the event isn't running; we done. event_sched_out() will have  in __perf_pending_disable()
6922 	 * Yay, we hit home and are in the context of the event.  in __perf_pending_disable()
6925 		if (event->pending_disable) {  in __perf_pending_disable()
6926 			event->pending_disable = 0;  in __perf_pending_disable()
6927 			perf_event_disable_local(event);  in __perf_pending_disable()
6950 	 * But the event runs on CPU-B and wants disabling there.  in __perf_pending_disable()
6952 	irq_work_queue_on(&event->pending_disable_irq, cpu);  in __perf_pending_disable()
6957 	struct perf_event *event = container_of(entry, struct perf_event, pending_disable_irq);  in perf_pending_disable()  local
6965 	__perf_pending_disable(event);  in perf_pending_disable()
6972 	struct perf_event *event = container_of(entry, struct perf_event, pending_irq);  in perf_pending_irq()  local
6982 	 * The wakeup isn't bound to the context of the event -- it can happen  in perf_pending_irq()
6983 	 * irrespective of where the event is.  in perf_pending_irq()
6985 	if (event->pending_wakeup) {  in perf_pending_irq()
6986 		event->pending_wakeup = 0;  in perf_pending_irq()
6987 		perf_event_wakeup(event);  in perf_pending_irq()
6996 	struct perf_event *event = container_of(head, struct perf_event, pending_task);  in perf_pending_task()  local
7005 	if (event->pending_work) {  in perf_pending_task()
7006 		event->pending_work = 0;  in perf_pending_task()
7007 		perf_sigtrap(event);  in perf_pending_task()
7008 		local_dec(&event->ctx->nr_no_switch_fast);  in perf_pending_task()
7010 	put_event(event);  in perf_pending_task()
7054 static bool should_sample_guest(struct perf_event *event)  in should_sample_guest()  argument
7056 	return !event->attr.exclude_guest && perf_guest_state();  in should_sample_guest()
7059 unsigned long perf_misc_flags(struct perf_event *event,  in perf_misc_flags()  argument
7062 	if (should_sample_guest(event))  in perf_misc_flags()
7068 unsigned long perf_instruction_pointer(struct perf_event *event,  in perf_instruction_pointer()  argument
7071 	if (should_sample_guest(event))  in perf_instruction_pointer()
7210 static unsigned long perf_prepare_sample_aux(struct perf_event *event,  in perf_prepare_sample_aux()  argument
7214 	struct perf_event *sampler = event->aux_event;  in perf_prepare_sample_aux()
7249                                  struct perf_event *event,  in perf_pmu_snapshot_aux()  argument
7259 	 * the IRQ ones, that is, for example, re-starting an event that's just  in perf_pmu_snapshot_aux()
7261 	 * doesn't change the event state.  in perf_pmu_snapshot_aux()
7273 	ret = event->pmu->snapshot_aux(event, handle, size);  in perf_pmu_snapshot_aux()
7282 static void perf_aux_sample_output(struct perf_event *event,  in perf_aux_sample_output()  argument
7286 	struct perf_event *sampler = event->aux_event;  in perf_aux_sample_output()
7328  * when event->attr.sample_id_all is set.
7335 					 struct perf_event *event,  in __perf_event_header__init_id()  argument
7338 	data->type = event->attr.sample_type;  in __perf_event_header__init_id()
7343 		data->tid_entry.pid = perf_event_pid(event, current);  in __perf_event_header__init_id()
7344 		data->tid_entry.tid = perf_event_tid(event, current);  in __perf_event_header__init_id()
7348 		data->time = perf_event_clock(event);  in __perf_event_header__init_id()
7351 		data->id = primary_event_id(event);  in __perf_event_header__init_id()
7354 		data->stream_id = event->id;  in __perf_event_header__init_id()
7364 				struct perf_event *event)  in perf_event_header__init_id()  argument
7366 	if (event->attr.sample_id_all) {  in perf_event_header__init_id()
7367 		header->size += event->id_header_size;  in perf_event_header__init_id()
7368 		__perf_event_header__init_id(data, event, event->attr.sample_type);  in perf_event_header__init_id()
7396 void perf_event__output_id_sample(struct perf_event *event,  in perf_event__output_id_sample()  argument
7400 	if (event->attr.sample_id_all)  in perf_event__output_id_sample()
7405 				 struct perf_event *event,  in perf_output_read_one()  argument
7408 	u64 read_format = event->attr.read_format;  in perf_output_read_one()
7412 	values[n++] = perf_event_count(event, has_inherit_and_sample_read(&event->attr));  in perf_output_read_one()
7415 			atomic64_read(&event->child_total_time_enabled);  in perf_output_read_one()
7419 			atomic64_read(&event->child_total_time_running);  in perf_output_read_one()
7422 		values[n++] = primary_event_id(event);  in perf_output_read_one()
7424 		values[n++] = atomic64_read(&event->lost_samples);  in perf_output_read_one()
7430 				   struct perf_event *event,  in perf_output_read_group()  argument
7433 	struct perf_event *leader = event->group_leader, *sub;  in perf_output_read_group()
7434 	u64 read_format = event->attr.read_format;  in perf_output_read_group()
7438 	bool self = has_inherit_and_sample_read(&event->attr);  in perf_output_read_group()
7454 	if ((leader != event) &&  in perf_output_read_group()
7469 		if ((sub != event) &&  in perf_output_read_group()
7500 			     struct perf_event *event)  in perf_output_read()  argument
7503 	u64 read_format = event->attr.read_format;  in perf_output_read()
7507 	 * based on snapshot values taken when the event  in perf_output_read()
7515 		calc_timer_values(event, &now, &enabled, &running);  in perf_output_read()
7517 	if (event->attr.read_format & PERF_FORMAT_GROUP)  in perf_output_read()
7518 		perf_output_read_group(handle, event, enabled, running);  in perf_output_read()
7520 		perf_output_read_one(handle, event, enabled, running);  in perf_output_read()
7526 			struct perf_event *event)  in perf_output_sample()  argument
7560 		perf_output_read(handle, event);  in perf_output_sample()
7611 			if (branch_sample_hw_index(event))  in perf_output_sample()
7641 			u64 mask = event->attr.sample_regs_user;  in perf_output_sample()
7672 			u64 mask = event->attr.sample_regs_intr;  in perf_output_sample()
7696 			perf_aux_sample_output(event, handle, data);  in perf_output_sample()
7699 	if (!event->attr.watermark) {  in perf_output_sample()
7700 		int wakeup_events = event->attr.wakeup_events;  in perf_output_sample()
7843 perf_callchain(struct perf_event *event, struct pt_regs *regs)  in perf_callchain()  argument
7845 	bool kernel = !event->attr.exclude_callchain_kernel;  in perf_callchain()
7846 	bool user   = !event->attr.exclude_callchain_user;  in perf_callchain()
7848 	bool crosstask = event->ctx->task && event->ctx->task != current;  in perf_callchain()
7849 	const u32 max_stack = event->attr.sample_max_stack;  in perf_callchain()
7866 			 struct perf_event *event,  in perf_prepare_sample()  argument
7869 	u64 sample_type = event->attr.sample_type;  in perf_prepare_sample()
7887 		data->type = event->attr.sample_type;  in perf_prepare_sample()
7891 	__perf_event_header__init_id(data, event, filtered_sample_type);  in perf_prepare_sample()
7894 		data->ip = perf_instruction_pointer(event, regs);  in perf_prepare_sample()
7899 		perf_sample_save_callchain(data, event, regs);  in perf_prepare_sample()
7926 			u64 mask = event->attr.sample_regs_user;  in perf_prepare_sample()
7941 		u16 stack_size = event->attr.sample_stack_user;  in perf_prepare_sample()
7942 		u16 header_size = perf_sample_data_size(data, event);  in perf_prepare_sample()
7988 			u64 mask = event->attr.sample_regs_intr;  in perf_prepare_sample()
8030 		u16 header_size = perf_sample_data_size(data, event);  in perf_prepare_sample()
8041 			     event->attr.aux_sample_size);  in perf_prepare_sample()
8043 		size = perf_prepare_sample_aux(event, data, size);  in perf_prepare_sample()
8053 			 struct perf_event *event,  in perf_prepare_header()  argument
8057 	header->size = perf_sample_data_size(data, event);  in perf_prepare_header()
8058 	header->misc = perf_misc_flags(event, regs);  in perf_prepare_header()
8071 static void __perf_event_aux_pause(struct perf_event *event, bool pause)  in __perf_event_aux_pause()  argument
8074 		if (!event->hw.aux_paused) {  in __perf_event_aux_pause()
8075 			event->hw.aux_paused = 1;  in __perf_event_aux_pause()
8076 			event->pmu->stop(event, PERF_EF_PAUSE);  in __perf_event_aux_pause()
8079 		if (event->hw.aux_paused) {  in __perf_event_aux_pause()
8080 			event->hw.aux_paused = 0;  in __perf_event_aux_pause()
8081 			event->pmu->start(event, PERF_EF_RESUME);  in __perf_event_aux_pause()
8086 static void perf_event_aux_pause(struct perf_event *event, bool pause)  in perf_event_aux_pause()  argument
8090 	if (WARN_ON_ONCE(!event))  in perf_event_aux_pause()
8093 	rb = ring_buffer_get(event);  in perf_event_aux_pause()
8099 		 * Guard against self-recursion here. Another event could trip  in perf_event_aux_pause()
8107 		__perf_event_aux_pause(event, pause);  in perf_event_aux_pause()
8115 __perf_event_output(struct perf_event *event,  in __perf_event_output()  argument
8130 	perf_prepare_sample(data, event, regs);  in __perf_event_output()
8131 	perf_prepare_header(&header, data, event, regs);  in __perf_event_output()
8133 	err = output_begin(&handle, data, event, header.size);  in __perf_event_output()
8137 	perf_output_sample(&handle, &header, data, event);  in __perf_event_output()
8147 perf_event_output_forward(struct perf_event *event,  in perf_event_output_forward()  argument
8151 	__perf_event_output(event, data, regs, perf_output_begin_forward);  in perf_event_output_forward()
8155 perf_event_output_backward(struct perf_event *event,  in perf_event_output_backward()  argument
8159 	__perf_event_output(event, data, regs, perf_output_begin_backward);  in perf_event_output_backward()
8163 perf_event_output(struct perf_event *event,  in perf_event_output()  argument
8167 	return __perf_event_output(event, data, regs, perf_output_begin);  in perf_event_output()
8182 perf_event_read_event(struct perf_event *event,  in perf_event_read_event()  argument
8191 			.size = sizeof(read_event) + event->read_size,  in perf_event_read_event()
8193 		.pid = perf_event_pid(event, task),  in perf_event_read_event()
8194 		.tid = perf_event_tid(event, task),  in perf_event_read_event()
8198 	perf_event_header__init_id(&read_event.header, &sample, event);  in perf_event_read_event()
8199 	ret = perf_output_begin(&handle, &sample, event, read_event.header.size);  in perf_event_read_event()
8204 	perf_output_read(&handle, event);  in perf_event_read_event()
8205 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_read_event()
8210 typedef void (perf_iterate_f)(struct perf_event *event, void *data);
8217 	struct perf_event *event;  in perf_iterate_ctx()  local
8219 	list_for_each_entry_rcu(event, &ctx->event_list, event_entry) {  in perf_iterate_ctx()
8221 			if (event->state < PERF_EVENT_STATE_INACTIVE)  in perf_iterate_ctx()
8223 			if (!event_filter_match(event))  in perf_iterate_ctx()
8227 		output(event, data);  in perf_iterate_ctx()
8234 	struct perf_event *event;  in perf_iterate_sb_cpu()  local
8236 	list_for_each_entry_rcu(event, &pel->list, sb_list) {  in perf_iterate_sb_cpu()
8239 		 * if we observe event->ctx, both event and ctx will be  in perf_iterate_sb_cpu()
8242 		if (!smp_load_acquire(&event->ctx))  in perf_iterate_sb_cpu()
8245 		if (event->state < PERF_EVENT_STATE_INACTIVE)  in perf_iterate_sb_cpu()
8247 		if (!event_filter_match(event))  in perf_iterate_sb_cpu()
8249 		output(event, data);  in perf_iterate_sb_cpu()
8257  * your event, otherwise it might not get delivered.
8292 static void perf_event_addr_filters_exec(struct perf_event *event, void *data)  in perf_event_addr_filters_exec()  argument
8294 	struct perf_addr_filters_head *ifh = perf_event_addr_filters(event);  in perf_event_addr_filters_exec()
8299 	if (!has_addr_filter(event))  in perf_event_addr_filters_exec()
8305 			event->addr_filter_ranges[count].start = 0;  in perf_event_addr_filters_exec()
8306 			event->addr_filter_ranges[count].size = 0;  in perf_event_addr_filters_exec()
8314 		event->addr_filters_gen++;  in perf_event_addr_filters_exec()
8318 		perf_event_stop(event, 1);  in perf_event_addr_filters_exec()
8343 static void __perf_event_output_stop(struct perf_event *event, void *data)  in __perf_event_output_stop()  argument
8345 	struct perf_event *parent = event->parent;  in __perf_event_output_stop()
8349 		.event	= event,  in __perf_event_output_stop()
8352 	if (!has_aux(event))  in __perf_event_output_stop()
8356 		parent = event;  in __perf_event_output_stop()
8362 	 * We are using event::rb to determine if the event should be stopped,  in __perf_event_output_stop()
8364 	 * which will make us skip the event that actually needs to be stopped.  in __perf_event_output_stop()
8365 	 * So ring_buffer_attach() has to stop an aux event before re-assigning  in __perf_event_output_stop()
8374 	struct perf_event *event = info;  in __perf_pmu_output_stop()  local
8377 		.rb	= event->rb,  in __perf_pmu_output_stop()
8390 static void perf_pmu_output_stop(struct perf_event *event)  in perf_pmu_output_stop()  argument
8397 	list_for_each_entry_rcu(iter, &event->rb->event_list, rb_entry) {  in perf_pmu_output_stop()
8401 		 * sufficient to stop the event itself if it's active, since  in perf_pmu_output_stop()
8411 		err = cpu_function_call(cpu, __perf_pmu_output_stop, event);  in perf_pmu_output_stop()
8441 static int perf_event_task_match(struct perf_event *event)  in perf_event_task_match()  argument
8443 	return event->attr.comm  || event->attr.mmap ||  in perf_event_task_match()
8444 	       event->attr.mmap2 || event->attr.mmap_data ||  in perf_event_task_match()
8445 	       event->attr.task;  in perf_event_task_match()
8448 static void perf_event_task_output(struct perf_event *event,  in perf_event_task_output()  argument
8457 	if (!perf_event_task_match(event))  in perf_event_task_output()
8460 	perf_event_header__init_id(&task_event->event_id.header, &sample, event);  in perf_event_task_output()
8462 	ret = perf_output_begin(&handle, &sample, event,  in perf_event_task_output()
8467 	task_event->event_id.pid = perf_event_pid(event, task);  in perf_event_task_output()
8468 	task_event->event_id.tid = perf_event_tid(event, task);  in perf_event_task_output()
8471 		task_event->event_id.ppid = perf_event_pid(event,  in perf_event_task_output()
8473 		task_event->event_id.ptid = perf_event_pid(event,  in perf_event_task_output()
8476 		task_event->event_id.ppid = perf_event_pid(event, current);  in perf_event_task_output()
8477 		task_event->event_id.ptid = perf_event_tid(event, current);  in perf_event_task_output()
8480 	task_event->event_id.time = perf_event_clock(event);  in perf_event_task_output()
8484 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_task_output()
8547 static int perf_event_comm_match(struct perf_event *event)  in perf_event_comm_match()  argument
8549 	return event->attr.comm;  in perf_event_comm_match()
8552 static void perf_event_comm_output(struct perf_event *event,  in perf_event_comm_output()  argument
8561 	if (!perf_event_comm_match(event))  in perf_event_comm_output()
8564 	perf_event_header__init_id(&comm_event->event_id.header, &sample, event);  in perf_event_comm_output()
8565 	ret = perf_output_begin(&handle, &sample, event,  in perf_event_comm_output()
8571 	comm_event->event_id.pid = perf_event_pid(event, comm_event->task);  in perf_event_comm_output()
8572 	comm_event->event_id.tid = perf_event_tid(event, comm_event->task);  in perf_event_comm_output()
8578 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_comm_output()
8646 static int perf_event_namespaces_match(struct perf_event *event)  in perf_event_namespaces_match()  argument
8648 	return event->attr.namespaces;  in perf_event_namespaces_match()
8651 static void perf_event_namespaces_output(struct perf_event *event,  in perf_event_namespaces_output()  argument
8660 	if (!perf_event_namespaces_match(event))  in perf_event_namespaces_output()
8664 				   &sample, event);  in perf_event_namespaces_output()
8665 	ret = perf_output_begin(&handle, &sample, event,  in perf_event_namespaces_output()
8670 	namespaces_event->event_id.pid = perf_event_pid(event,  in perf_event_namespaces_output()
8672 	namespaces_event->event_id.tid = perf_event_tid(event,  in perf_event_namespaces_output()
8677 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_namespaces_output()
8774 static int perf_event_cgroup_match(struct perf_event *event)  in perf_event_cgroup_match()  argument
8776 	return event->attr.cgroup;  in perf_event_cgroup_match()
8779 static void perf_event_cgroup_output(struct perf_event *event, void *data)  in perf_event_cgroup_output()  argument
8787 	if (!perf_event_cgroup_match(event))  in perf_event_cgroup_output()
8791 				   &sample, event);  in perf_event_cgroup_output()
8792 	ret = perf_output_begin(&handle, &sample, event,  in perf_event_cgroup_output()
8800 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_cgroup_output()
8885 static int perf_event_mmap_match(struct perf_event *event,  in perf_event_mmap_match()  argument
8892 	return (!executable && event->attr.mmap_data) ||  in perf_event_mmap_match()
8893 	       (executable && (event->attr.mmap || event->attr.mmap2));  in perf_event_mmap_match()
8896 static void perf_event_mmap_output(struct perf_event *event,  in perf_event_mmap_output()  argument
8907 	if (!perf_event_mmap_match(event, data))  in perf_event_mmap_output()
8910 	if (event->attr.mmap2) {  in perf_event_mmap_output()
8920 	perf_event_header__init_id(&mmap_event->event_id.header, &sample, event);  in perf_event_mmap_output()
8921 	ret = perf_output_begin(&handle, &sample, event,  in perf_event_mmap_output()
8926 	mmap_event->event_id.pid = perf_event_pid(event, current);  in perf_event_mmap_output()
8927 	mmap_event->event_id.tid = perf_event_tid(event, current);  in perf_event_mmap_output()
8929 	use_build_id = event->attr.build_id && mmap_event->build_id_size;  in perf_event_mmap_output()
8931 	if (event->attr.mmap2 && use_build_id)  in perf_event_mmap_output()
8936 	if (event->attr.mmap2) {  in perf_event_mmap_output()
8955 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_mmap_output()
9116 static void __perf_addr_filters_adjust(struct perf_event *event, void *data)  in __perf_addr_filters_adjust()  argument
9118 	struct perf_addr_filters_head *ifh = perf_event_addr_filters(event);  in __perf_addr_filters_adjust()
9124 	if (!has_addr_filter(event))  in __perf_addr_filters_adjust()
9133 						&event->addr_filter_ranges[count]))  in __perf_addr_filters_adjust()
9140 		event->addr_filters_gen++;  in __perf_addr_filters_adjust()
9144 		perf_event_stop(event, 1);  in __perf_addr_filters_adjust()
9203 void perf_event_aux_event(struct perf_event *event, unsigned long head,  in perf_event_aux_event()  argument
9225 	perf_event_header__init_id(&rec.header, &sample, event);  in perf_event_aux_event()
9226 	ret = perf_output_begin(&handle, &sample, event, rec.header.size);  in perf_event_aux_event()
9232 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_aux_event()
9240 void perf_log_lost_samples(struct perf_event *event, u64 lost)  in perf_log_lost_samples()  argument
9258 	perf_event_header__init_id(&lost_samples_event.header, &sample, event);  in perf_log_lost_samples()
9260 	ret = perf_output_begin(&handle, &sample, event,  in perf_log_lost_samples()
9266 	perf_event__output_id_sample(event, &handle, &sample);  in perf_log_lost_samples()
9285 static int perf_event_switch_match(struct perf_event *event)  in perf_event_switch_match()  argument
9287 	return event->attr.context_switch;  in perf_event_switch_match()
9290 static void perf_event_switch_output(struct perf_event *event, void *data)  in perf_event_switch_output()  argument
9297 	if (!perf_event_switch_match(event))  in perf_event_switch_output()
9301 	if (event->ctx->task) {  in perf_event_switch_output()
9308 					perf_event_pid(event, se->next_prev);  in perf_event_switch_output()
9310 					perf_event_tid(event, se->next_prev);  in perf_event_switch_output()
9313 	perf_event_header__init_id(&se->event_id.header, &sample, event);  in perf_event_switch_output()
9315 	ret = perf_output_begin(&handle, &sample, event, se->event_id.header.size);  in perf_event_switch_output()
9319 	if (event->ctx->task)  in perf_event_switch_output()
9324 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_switch_output()
9362 static void perf_log_throttle(struct perf_event *event, int enable)  in perf_log_throttle()  argument
9379 		.time		= perf_event_clock(event),  in perf_log_throttle()
9380 		.id		= primary_event_id(event),  in perf_log_throttle()
9381 		.stream_id	= event->id,  in perf_log_throttle()
9387 	perf_event_header__init_id(&throttle_event.header, &sample, event);  in perf_log_throttle()
9389 	ret = perf_output_begin(&handle, &sample, event,  in perf_log_throttle()
9395 	perf_event__output_id_sample(event, &handle, &sample);  in perf_log_throttle()
9415 static int perf_event_ksymbol_match(struct perf_event *event)  in perf_event_ksymbol_match()  argument
9417 	return event->attr.ksymbol;  in perf_event_ksymbol_match()
9420 static void perf_event_ksymbol_output(struct perf_event *event, void *data)  in perf_event_ksymbol_output()  argument
9427 	if (!perf_event_ksymbol_match(event))  in perf_event_ksymbol_output()
9431 				   &sample, event);  in perf_event_ksymbol_output()
9432 	ret = perf_output_begin(&handle, &sample, event,  in perf_event_ksymbol_output()
9439 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_ksymbol_output()
9505 static int perf_event_bpf_match(struct perf_event *event)  in perf_event_bpf_match()  argument
9507 	return event->attr.bpf_event;  in perf_event_bpf_match()
9510 static void perf_event_bpf_output(struct perf_event *event, void *data)  in perf_event_bpf_output()  argument
9517 	if (!perf_event_bpf_match(event))  in perf_event_bpf_output()
9521 				   &sample, event);  in perf_event_bpf_output()
9522 	ret = perf_output_begin(&handle, &sample, event,  in perf_event_bpf_output()
9528 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_bpf_output()
9607 static int perf_event_text_poke_match(struct perf_event *event)  in perf_event_text_poke_match()  argument
9609 	return event->attr.text_poke;  in perf_event_text_poke_match()
9612 static void perf_event_text_poke_output(struct perf_event *event, void *data)  in perf_event_text_poke_output()  argument
9620 	if (!perf_event_text_poke_match(event))  in perf_event_text_poke_output()
9623 	perf_event_header__init_id(&text_poke_event->event_id.header, &sample, event);  in perf_event_text_poke_output()
9625 	ret = perf_output_begin(&handle, &sample, event,  in perf_event_text_poke_output()
9640 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_text_poke_output()
9677 void perf_event_itrace_started(struct perf_event *event)  in perf_event_itrace_started()  argument
9679 	event->attach_state |= PERF_ATTACH_ITRACE;  in perf_event_itrace_started()
9682 static void perf_log_itrace_start(struct perf_event *event)  in perf_log_itrace_start()  argument
9693 	if (event->parent)  in perf_log_itrace_start()
9694 		event = event->parent;  in perf_log_itrace_start()
9696 	if (!(event->pmu->capabilities & PERF_PMU_CAP_ITRACE) ||  in perf_log_itrace_start()
9697 	    event->attach_state & PERF_ATTACH_ITRACE)  in perf_log_itrace_start()
9703 	rec.pid	= perf_event_pid(event, current);  in perf_log_itrace_start()
9704 	rec.tid	= perf_event_tid(event, current);  in perf_log_itrace_start()
9706 	perf_event_header__init_id(&rec.header, &sample, event);  in perf_log_itrace_start()
9707 	ret = perf_output_begin(&handle, &sample, event, rec.header.size);  in perf_log_itrace_start()
9713 	perf_event__output_id_sample(event, &handle, &sample);  in perf_log_itrace_start()
9718 void perf_report_aux_output_id(struct perf_event *event, u64 hw_id)  in perf_report_aux_output_id()  argument
9728 	if (event->parent)  in perf_report_aux_output_id()
9729 		event = event->parent;  in perf_report_aux_output_id()
9736 	perf_event_header__init_id(&rec.header, &sample, event);  in perf_report_aux_output_id()
9737 	ret = perf_output_begin(&handle, &sample, event, rec.header.size);  in perf_report_aux_output_id()
9743 	perf_event__output_id_sample(event, &handle, &sample);  in perf_report_aux_output_id()
9750 __perf_event_account_interrupt(struct perf_event *event, int throttle)  in __perf_event_account_interrupt()  argument
9752 	struct hw_perf_event *hwc = &event->hw;  in __perf_event_account_interrupt()
9767 			perf_log_throttle(event, 0);  in __perf_event_account_interrupt()
9772 	if (event->attr.freq) {  in __perf_event_account_interrupt()
9779 			perf_adjust_period(event, delta, hwc->last_period, true);  in __perf_event_account_interrupt()
9785 int perf_event_account_interrupt(struct perf_event *event)  in perf_event_account_interrupt()  argument
9787 	return __perf_event_account_interrupt(event, 1);  in perf_event_account_interrupt()
9790 static inline bool sample_is_allowed(struct perf_event *event, struct pt_regs *regs)  in sample_is_allowed()  argument
9797 	if (event->attr.exclude_kernel && !user_mode(regs))  in sample_is_allowed()
9804 static int bpf_overflow_handler(struct perf_event *event,  in bpf_overflow_handler()  argument
9810 		.event = event,  in bpf_overflow_handler()
9819 	prog = READ_ONCE(event->prog);  in bpf_overflow_handler()
9821 		perf_prepare_sample(data, event, regs);  in bpf_overflow_handler()
9831 static inline int perf_event_set_bpf_handler(struct perf_event *event,  in perf_event_set_bpf_handler()  argument
9835 	if (event->overflow_handler_context)  in perf_event_set_bpf_handler()
9839 	if (event->prog)  in perf_event_set_bpf_handler()
9845 	if (event->attr.precise_ip &&  in perf_event_set_bpf_handler()
9847 	    (!(event->attr.sample_type & PERF_SAMPLE_CALLCHAIN) ||  in perf_event_set_bpf_handler()
9848 	     event->attr.exclude_callchain_kernel ||  in perf_event_set_bpf_handler()
9849 	     event->attr.exclude_callchain_user)) {  in perf_event_set_bpf_handler()
9862 	event->prog = prog;  in perf_event_set_bpf_handler()
9863 	event->bpf_cookie = bpf_cookie;  in perf_event_set_bpf_handler()
9867 static inline void perf_event_free_bpf_handler(struct perf_event *event)  in perf_event_free_bpf_handler()  argument
9869 	struct bpf_prog *prog = event->prog;  in perf_event_free_bpf_handler()
9874 	event->prog = NULL;  in perf_event_free_bpf_handler()
9878 static inline int bpf_overflow_handler(struct perf_event *event,  in bpf_overflow_handler()  argument
9885 static inline int perf_event_set_bpf_handler(struct perf_event *event,  in perf_event_set_bpf_handler()  argument
9892 static inline void perf_event_free_bpf_handler(struct perf_event *event)  in perf_event_free_bpf_handler()  argument
9898  * Generic event overflow handling, sampling.
9901 static int __perf_event_overflow(struct perf_event *event,  in __perf_event_overflow()  argument
9905 	int events = atomic_read(&event->event_limit);  in __perf_event_overflow()
9912 	if (unlikely(!is_sampling_event(event)))  in __perf_event_overflow()
9915 	ret = __perf_event_account_interrupt(event, throttle);  in __perf_event_overflow()
9917 	if (event->attr.aux_pause)  in __perf_event_overflow()
9918 		perf_event_aux_pause(event->aux_event, true);  in __perf_event_overflow()
9920 	if (event->prog && event->prog->type == BPF_PROG_TYPE_PERF_EVENT &&  in __perf_event_overflow()
9921 	    !bpf_overflow_handler(event, data, regs))  in __perf_event_overflow()
9929 	event->pending_kill = POLL_IN;  in __perf_event_overflow()
9930 	if (events && atomic_dec_and_test(&event->event_limit)) {  in __perf_event_overflow()
9932 		event->pending_kill = POLL_HUP;  in __perf_event_overflow()
9933 		perf_event_disable_inatomic(event);  in __perf_event_overflow()
9936 	if (event->attr.sigtrap) {  in __perf_event_overflow()
9940 		 * it is the first event, on the other hand, we should also not  in __perf_event_overflow()
9943 		bool valid_sample = sample_is_allowed(event, regs);  in __perf_event_overflow()
9952 		if (!event->pending_work &&  in __perf_event_overflow()
9953 		    !task_work_add(current, &event->pending_task, notify_mode)) {  in __perf_event_overflow()
9954 			event->pending_work = pending_id;  in __perf_event_overflow()
9955 			local_inc(&event->ctx->nr_no_switch_fast);  in __perf_event_overflow()
9956 			WARN_ON_ONCE(!atomic_long_inc_not_zero(&event->refcount));  in __perf_event_overflow()
9958 			event->pending_addr = 0;  in __perf_event_overflow()
9960 				event->pending_addr = data->addr;  in __perf_event_overflow()
9962 		} else if (event->attr.exclude_kernel && valid_sample) {  in __perf_event_overflow()
9975 			WARN_ON_ONCE(event->pending_work != pending_id);  in __perf_event_overflow()
9979 	READ_ONCE(event->overflow_handler)(event, data, regs);  in __perf_event_overflow()  local
9981 	if (*perf_event_fasync(event) && event->pending_kill) {  in __perf_event_overflow()
9982 		event->pending_wakeup = 1;  in __perf_event_overflow()
9983 		irq_work_queue(&event->pending_irq);  in __perf_event_overflow()
9986 	if (event->attr.aux_resume)  in __perf_event_overflow()
9987 		perf_event_aux_pause(event->aux_event, false);  in __perf_event_overflow()
9992 int perf_event_overflow(struct perf_event *event,  in perf_event_overflow()  argument
9996 	return __perf_event_overflow(event, 1, data, regs);  in perf_event_overflow()
10000  * Generic software event infrastructure
10011  * We directly increment event->count and keep a second value in
10012  * event->hw.period_left to count intervals. This period event
10017 u64 perf_swevent_set_period(struct perf_event *event)  in perf_swevent_set_period()  argument
10019 	struct hw_perf_event *hwc = &event->hw;  in perf_swevent_set_period()
10040 static void perf_swevent_overflow(struct perf_event *event, u64 overflow,  in perf_swevent_overflow()  argument
10044 	struct hw_perf_event *hwc = &event->hw;  in perf_swevent_overflow()
10048 		overflow = perf_swevent_set_period(event);  in perf_swevent_overflow()
10054 		if (__perf_event_overflow(event, throttle,  in perf_swevent_overflow()
10066 static void perf_swevent_event(struct perf_event *event, u64 nr,  in perf_swevent_event()  argument
10070 	struct hw_perf_event *hwc = &event->hw;  in perf_swevent_event()
10072 	local64_add(nr, &event->count);  in perf_swevent_event()
10077 	if (!is_sampling_event(event))  in perf_swevent_event()
10080 	if ((event->attr.sample_type & PERF_SAMPLE_PERIOD) && !event->attr.freq) {  in perf_swevent_event()
10082 		return perf_swevent_overflow(event, 1, data, regs);  in perf_swevent_event()
10084 		data->period = event->hw.last_period;  in perf_swevent_event()
10086 	if (nr == 1 && hwc->sample_period == 1 && !event->attr.freq)  in perf_swevent_event()
10087 		return perf_swevent_overflow(event, 1, data, regs);  in perf_swevent_event()
10092 	perf_swevent_overflow(event, 0, data, regs);  in perf_swevent_event()
10095 int perf_exclude_event(struct perf_event *event, struct pt_regs *regs)  in perf_exclude_event()  argument
10097 	if (event->hw.state & PERF_HES_STOPPED)  in perf_exclude_event()
10101 		if (event->attr.exclude_user && user_mode(regs))  in perf_exclude_event()
10104 		if (event->attr.exclude_kernel && !user_mode(regs))  in perf_exclude_event()
10111 static int perf_swevent_match(struct perf_event *event,  in perf_swevent_match()  argument
10117 	if (event->attr.type != type)  in perf_swevent_match()
10120 	if (event->attr.config != event_id)  in perf_swevent_match()
10123 	if (perf_exclude_event(event, regs))  in perf_swevent_match()
10157 /* For the event head insertion and removal in the hlist */
10159 find_swevent_head(struct swevent_htable *swhash, struct perf_event *event)  in find_swevent_head()  argument
10162 	u32 event_id = event->attr.config;  in find_swevent_head()
10163 	u64 type = event->attr.type;  in find_swevent_head()
10166 	 * Event scheduling is always serialized against hlist allocation  in find_swevent_head()
10171 					  lockdep_is_held(&event->ctx->lock));  in find_swevent_head()
10184 	struct perf_event *event;  in do_perf_sw_event()  local
10192 	hlist_for_each_entry_rcu(event, head, hlist_entry) {  in do_perf_sw_event()
10193 		if (perf_swevent_match(event, type, event_id, data, regs))  in do_perf_sw_event()
10194 			perf_swevent_event(event, nr, data, regs);  in do_perf_sw_event()
10240 static void perf_swevent_read(struct perf_event *event)  in perf_swevent_read()  argument
10244 static int perf_swevent_add(struct perf_event *event, int flags)  in perf_swevent_add()  argument
10247 	struct hw_perf_event *hwc = &event->hw;  in perf_swevent_add()
10250 	if (is_sampling_event(event)) {  in perf_swevent_add()
10252 		perf_swevent_set_period(event);  in perf_swevent_add()
10257 	head = find_swevent_head(swhash, event);  in perf_swevent_add()
10261 	hlist_add_head_rcu(&event->hlist_entry, head);  in perf_swevent_add()
10262 	perf_event_update_userpage(event);  in perf_swevent_add()
10267 static void perf_swevent_del(struct perf_event *event, int flags)  in perf_swevent_del()  argument
10269 	hlist_del_rcu(&event->hlist_entry);  in perf_swevent_del()
10272 static void perf_swevent_start(struct perf_event *event, int flags)  in perf_swevent_start()  argument
10274 	event->hw.state = 0;  in perf_swevent_start()
10277 static void perf_swevent_stop(struct perf_event *event, int flags)  in perf_swevent_stop()  argument
10279 	event->hw.state = PERF_HES_STOPPED;  in perf_swevent_stop()
10371 static void sw_perf_event_destroy(struct perf_event *event)  in sw_perf_event_destroy()  argument
10373 	u64 event_id = event->attr.config;  in sw_perf_event_destroy()
10375 	WARN_ON(event->parent);  in sw_perf_event_destroy()
10384 static int perf_swevent_init(struct perf_event *event)  in perf_swevent_init()  argument
10386 	u64 event_id = event->attr.config;  in perf_swevent_init()
10388 	if (event->attr.type != PERF_TYPE_SOFTWARE)  in perf_swevent_init()
10394 	if (has_branch_stack(event))  in perf_swevent_init()
10399 		event->attr.type = perf_cpu_clock.type;  in perf_swevent_init()
10402 		event->attr.type = perf_task_clock.type;  in perf_swevent_init()
10412 	if (!event->parent) {  in perf_swevent_init()
10420 		event->destroy = sw_perf_event_destroy;  in perf_swevent_init()
10441 static void tp_perf_event_destroy(struct perf_event *event)  in tp_perf_event_destroy()  argument
10443 	perf_trace_destroy(event);  in tp_perf_event_destroy()
10446 static int perf_tp_event_init(struct perf_event *event)  in perf_tp_event_init()  argument
10450 	if (event->attr.type != PERF_TYPE_TRACEPOINT)  in perf_tp_event_init()
10456 	if (has_branch_stack(event))  in perf_tp_event_init()
10459 	err = perf_trace_init(event);  in perf_tp_event_init()
10463 	event->destroy = tp_perf_event_destroy;  in perf_tp_event_init()
10479 static int perf_tp_filter_match(struct perf_event *event,  in perf_tp_filter_match()  argument
10485 	if (event->parent)  in perf_tp_filter_match()
10486 		event = event->parent;  in perf_tp_filter_match()
10488 	if (likely(!event->filter) || filter_match_preds(event->filter, record))  in perf_tp_filter_match()
10493 static int perf_tp_event_match(struct perf_event *event,  in perf_tp_event_match()  argument
10497 	if (event->hw.state & PERF_HES_STOPPED)  in perf_tp_event_match()
10502 	if (event->attr.exclude_kernel && !user_mode(regs))  in perf_tp_event_match()
10505 	if (!perf_tp_filter_match(event, raw))  in perf_tp_event_match()
10523 	perf_tp_event(call->event.type, count, raw_data, size, regs, head,  in perf_trace_run_bpf_submit()
10532 					struct perf_event *event)  in __perf_tp_event_target_task()  argument
10536 	if (event->attr.config != entry->type)  in __perf_tp_event_target_task()
10539 	if (event->attr.sigtrap)  in __perf_tp_event_target_task()
10541 	if (perf_tp_event_match(event, raw, regs)) {  in __perf_tp_event_target_task()
10543 		perf_sample_save_raw_data(data, event, raw);  in __perf_tp_event_target_task()
10544 		perf_swevent_event(event, count, data, regs);  in __perf_tp_event_target_task()
10556 	struct perf_event *event, *sibling;  in perf_tp_event_target_task()  local
10558 	perf_event_groups_for_cpu_pmu(event, &ctx->pinned_groups, cpu, pmu) {  in perf_tp_event_target_task()
10559 		__perf_tp_event_target_task(count, record, regs, data, raw, event);  in perf_tp_event_target_task()
10560 		for_each_sibling_event(sibling, event)  in perf_tp_event_target_task()
10564 	perf_event_groups_for_cpu_pmu(event, &ctx->flexible_groups, cpu, pmu) {  in perf_tp_event_target_task()
10565 		__perf_tp_event_target_task(count, record, regs, data, raw, event);  in perf_tp_event_target_task()
10566 		for_each_sibling_event(sibling, event)  in perf_tp_event_target_task()
10576 	struct perf_event *event;  in perf_tp_event()  local
10587 	hlist_for_each_entry_rcu(event, head, hlist_entry) {  in perf_tp_event()
10588 		if (perf_tp_event_match(event, &raw, regs)) {  in perf_tp_event()
10591 			 * some members in data are event-specific and  in perf_tp_event()
10594 			 * the problem that next event skips preparing data  in perf_tp_event()
10598 			perf_sample_save_raw_data(&data, event, &raw);  in perf_tp_event()
10599 			perf_swevent_event(event, count, &data, regs);  in perf_tp_event()
10605 	 * deliver this event there too.  in perf_tp_event()
10666 static int perf_kprobe_event_init(struct perf_event *event);
10678 static int perf_kprobe_event_init(struct perf_event *event)  in perf_kprobe_event_init()  argument
10683 	if (event->attr.type != perf_kprobe.type)  in perf_kprobe_event_init()
10692 	if (has_branch_stack(event))  in perf_kprobe_event_init()
10695 	is_retprobe = event->attr.config & PERF_PROBE_CONFIG_IS_RETPROBE;  in perf_kprobe_event_init()
10696 	err = perf_kprobe_init(event, is_retprobe);  in perf_kprobe_event_init()
10700 	event->destroy = perf_kprobe_destroy;  in perf_kprobe_event_init()
10725 static int perf_uprobe_event_init(struct perf_event *event);
10737 static int perf_uprobe_event_init(struct perf_event *event)  in perf_uprobe_event_init()  argument
10743 	if (event->attr.type != perf_uprobe.type)  in perf_uprobe_event_init()
10752 	if (has_branch_stack(event))  in perf_uprobe_event_init()
10755 	is_retprobe = event->attr.config & PERF_PROBE_CONFIG_IS_RETPROBE;  in perf_uprobe_event_init()
10756 	ref_ctr_offset = event->attr.config >> PERF_UPROBE_REF_CTR_OFFSET_SHIFT;  in perf_uprobe_event_init()
10757 	err = perf_uprobe_init(event, ref_ctr_offset, is_retprobe);  in perf_uprobe_event_init()
10761 	event->destroy = perf_uprobe_destroy;  in perf_uprobe_event_init()
10778 static void perf_event_free_filter(struct perf_event *event)  in perf_event_free_filter()  argument
10780 	ftrace_profile_free_filter(event);  in perf_event_free_filter()
10784  * returns true if the event is a tracepoint, or a kprobe/upprobe created
10787 static inline bool perf_event_is_tracing(struct perf_event *event)  in perf_event_is_tracing()  argument
10789 	if (event->pmu == &perf_tracepoint)  in perf_event_is_tracing()
10792 	if (event->pmu == &perf_kprobe)  in perf_event_is_tracing()
10796 	if (event->pmu == &perf_uprobe)  in perf_event_is_tracing()
10802 int perf_event_set_bpf_prog(struct perf_event *event, struct bpf_prog *prog,  in perf_event_set_bpf_prog()  argument
10807 	if (!perf_event_is_tracing(event))  in perf_event_set_bpf_prog()
10808 		return perf_event_set_bpf_handler(event, prog, bpf_cookie);  in perf_event_set_bpf_prog()
10810 	is_kprobe = event->tp_event->flags & TRACE_EVENT_FL_KPROBE;  in perf_event_set_bpf_prog()
10811 	is_uprobe = event->tp_event->flags & TRACE_EVENT_FL_UPROBE;  in perf_event_set_bpf_prog()
10812 	is_tracepoint = event->tp_event->flags & TRACE_EVENT_FL_TRACEPOINT;  in perf_event_set_bpf_prog()
10813 	is_syscall_tp = is_syscall_trace_event(event->tp_event);  in perf_event_set_bpf_prog()
10832 		int off = trace_event_get_offsets(event->tp_event);  in perf_event_set_bpf_prog()
10838 	return perf_event_attach_bpf_prog(event, prog, bpf_cookie);  in perf_event_set_bpf_prog()
10841 void perf_event_free_bpf_prog(struct perf_event *event)  in perf_event_free_bpf_prog()  argument
10843 	if (!perf_event_is_tracing(event)) {  in perf_event_free_bpf_prog()
10844 		perf_event_free_bpf_handler(event);  in perf_event_free_bpf_prog()
10847 	perf_event_detach_bpf_prog(event);  in perf_event_free_bpf_prog()
10856 static void perf_event_free_filter(struct perf_event *event)  in perf_event_free_filter()  argument
10860 int perf_event_set_bpf_prog(struct perf_event *event, struct bpf_prog *prog,  in perf_event_set_bpf_prog()  argument
10866 void perf_event_free_bpf_prog(struct perf_event *event)  in perf_event_free_bpf_prog()  argument
10888 perf_addr_filter_new(struct perf_event *event, struct list_head *filters)  in perf_addr_filter_new()  argument
10890 	int node = cpu_to_node(event->cpu == -1 ? 0 : event->cpu);  in perf_addr_filter_new()
10917 static void perf_addr_filters_splice(struct perf_event *event,  in perf_addr_filters_splice()  argument
10923 	if (!has_addr_filter(event))  in perf_addr_filters_splice()
10927 	if (event->parent)  in perf_addr_filters_splice()
10930 	raw_spin_lock_irqsave(&event->addr_filters.lock, flags);  in perf_addr_filters_splice()
10932 	list_splice_init(&event->addr_filters.list, &list);  in perf_addr_filters_splice()
10934 		list_splice(head, &event->addr_filters.list);  in perf_addr_filters_splice()
10936 	raw_spin_unlock_irqrestore(&event->addr_filters.lock, flags);  in perf_addr_filters_splice()
10963  * Update event's address range filters based on the
10966 static void perf_event_addr_filters_apply(struct perf_event *event)  in perf_event_addr_filters_apply()  argument
10968 	struct perf_addr_filters_head *ifh = perf_event_addr_filters(event);  in perf_event_addr_filters_apply()
10969 	struct task_struct *task = READ_ONCE(event->ctx->task);  in perf_event_addr_filters_apply()
10976 	 * We may observe TASK_TOMBSTONE, which means that the event tear-down  in perf_event_addr_filters_apply()
10997 			event->addr_filter_ranges[count].start = 0;  in perf_event_addr_filters_apply()
10998 			event->addr_filter_ranges[count].size = 0;  in perf_event_addr_filters_apply()
11000 			perf_addr_filter_apply(filter, mm, &event->addr_filter_ranges[count]);  in perf_event_addr_filters_apply()
11002 			event->addr_filter_ranges[count].start = filter->offset;  in perf_event_addr_filters_apply()
11003 			event->addr_filter_ranges[count].size  = filter->size;  in perf_event_addr_filters_apply()
11009 	event->addr_filters_gen++;  in perf_event_addr_filters_apply()
11019 	perf_event_stop(event, 1);  in perf_event_addr_filters_apply()
11073 perf_event_parse_addr_filter(struct perf_event *event, char *fstr,  in perf_event_parse_addr_filter()  argument
11100 			filter = perf_addr_filter_new(event, filters);  in perf_event_parse_addr_filter()
11159 		 * Make sure that it doesn't contradict itself or the event's  in perf_event_parse_addr_filter()
11186 				if (!event->ctx->task)  in perf_event_parse_addr_filter()
11201 				event->addr_filters.nr_file_filters++;  in perf_event_parse_addr_filter()
11230 perf_event_set_addr_filter(struct perf_event *event, char *filter_str)  in perf_event_set_addr_filter()  argument
11239 	lockdep_assert_held(&event->ctx->mutex);  in perf_event_set_addr_filter()
11241 	if (WARN_ON_ONCE(event->parent))  in perf_event_set_addr_filter()
11244 	ret = perf_event_parse_addr_filter(event, filter_str, &filters);  in perf_event_set_addr_filter()
11248 	ret = event->pmu->addr_filters_validate(&filters);  in perf_event_set_addr_filter()
11253 	perf_addr_filters_splice(event, &filters);  in perf_event_set_addr_filter()
11256 	perf_event_for_each_child(event, perf_event_addr_filters_apply);  in perf_event_set_addr_filter()
11264 	event->addr_filters.nr_file_filters = 0;  in perf_event_set_addr_filter()
11269 static int perf_event_set_filter(struct perf_event *event, void __user *arg)  in perf_event_set_filter()  argument
11279 	if (perf_event_is_tracing(event)) {  in perf_event_set_filter()
11280 		struct perf_event_context *ctx = event->ctx;  in perf_event_set_filter()
11290 		 * This can result in event getting moved to a different ctx,  in perf_event_set_filter()
11294 		ret = ftrace_profile_set_filter(event, event->attr.config, filter_str);  in perf_event_set_filter()
11298 	if (has_addr_filter(event))  in perf_event_set_filter()
11299 		ret = perf_event_set_addr_filter(event, filter_str);  in perf_event_set_filter()
11314 	struct perf_event *event;  in perf_swevent_hrtimer()  local
11317 	event = container_of(hrtimer, struct perf_event, hw.hrtimer);  in perf_swevent_hrtimer()
11319 	if (event->state != PERF_EVENT_STATE_ACTIVE)  in perf_swevent_hrtimer()
11322 	event->pmu->read(event);  in perf_swevent_hrtimer()
11324 	perf_sample_data_init(&data, 0, event->hw.last_period);  in perf_swevent_hrtimer()
11327 	if (regs && !perf_exclude_event(event, regs)) {  in perf_swevent_hrtimer()
11328 		if (!(event->attr.exclude_idle && is_idle_task(current)))  in perf_swevent_hrtimer()
11329 			if (__perf_event_overflow(event, 1, &data, regs))  in perf_swevent_hrtimer()
11333 	period = max_t(u64, 10000, event->hw.sample_period);  in perf_swevent_hrtimer()
11339 static void perf_swevent_start_hrtimer(struct perf_event *event)  in perf_swevent_start_hrtimer()  argument
11341 	struct hw_perf_event *hwc = &event->hw;  in perf_swevent_start_hrtimer()
11344 	if (!is_sampling_event(event))  in perf_swevent_start_hrtimer()
11360 static void perf_swevent_cancel_hrtimer(struct perf_event *event)  in perf_swevent_cancel_hrtimer()  argument
11362 	struct hw_perf_event *hwc = &event->hw;  in perf_swevent_cancel_hrtimer()
11364 	if (is_sampling_event(event)) {  in perf_swevent_cancel_hrtimer()
11372 static void perf_swevent_init_hrtimer(struct perf_event *event)  in perf_swevent_init_hrtimer()  argument
11374 	struct hw_perf_event *hwc = &event->hw;  in perf_swevent_init_hrtimer()
11376 	if (!is_sampling_event(event))  in perf_swevent_init_hrtimer()
11386 	if (event->attr.freq) {  in perf_swevent_init_hrtimer()
11387 		long freq = event->attr.sample_freq;  in perf_swevent_init_hrtimer()
11389 		event->attr.sample_period = NSEC_PER_SEC / freq;  in perf_swevent_init_hrtimer()
11390 		hwc->sample_period = event->attr.sample_period;  in perf_swevent_init_hrtimer()
11393 		event->attr.freq = 0;  in perf_swevent_init_hrtimer()
11398  * Software event: cpu wall time clock
11401 static void cpu_clock_event_update(struct perf_event *event)  in cpu_clock_event_update()  argument
11407 	prev = local64_xchg(&event->hw.prev_count, now);  in cpu_clock_event_update()
11408 	local64_add(now - prev, &event->count);  in cpu_clock_event_update()
11411 static void cpu_clock_event_start(struct perf_event *event, int flags)  in cpu_clock_event_start()  argument
11413 	local64_set(&event->hw.prev_count, local_clock());  in cpu_clock_event_start()
11414 	perf_swevent_start_hrtimer(event);  in cpu_clock_event_start()
11417 static void cpu_clock_event_stop(struct perf_event *event, int flags)  in cpu_clock_event_stop()  argument
11419 	perf_swevent_cancel_hrtimer(event);  in cpu_clock_event_stop()
11420 	cpu_clock_event_update(event);  in cpu_clock_event_stop()
11423 static int cpu_clock_event_add(struct perf_event *event, int flags)  in cpu_clock_event_add()  argument
11426 		cpu_clock_event_start(event, flags);  in cpu_clock_event_add()
11427 	perf_event_update_userpage(event);  in cpu_clock_event_add()
11432 static void cpu_clock_event_del(struct perf_event *event, int flags)  in cpu_clock_event_del()  argument
11434 	cpu_clock_event_stop(event, flags);  in cpu_clock_event_del()
11437 static void cpu_clock_event_read(struct perf_event *event)  in cpu_clock_event_read()  argument
11439 	cpu_clock_event_update(event);  in cpu_clock_event_read()
11442 static int cpu_clock_event_init(struct perf_event *event)  in cpu_clock_event_init()  argument
11444 	if (event->attr.type != perf_cpu_clock.type)  in cpu_clock_event_init()
11447 	if (event->attr.config != PERF_COUNT_SW_CPU_CLOCK)  in cpu_clock_event_init()
11453 	if (has_branch_stack(event))  in cpu_clock_event_init()
11456 	perf_swevent_init_hrtimer(event);  in cpu_clock_event_init()
11476  * Software event: task time clock
11479 static void task_clock_event_update(struct perf_event *event, u64 now)  in task_clock_event_update()  argument
11484 	prev = local64_xchg(&event->hw.prev_count, now);  in task_clock_event_update()
11486 	local64_add(delta, &event->count);  in task_clock_event_update()
11489 static void task_clock_event_start(struct perf_event *event, int flags)  in task_clock_event_start()  argument
11491 	local64_set(&event->hw.prev_count, event->ctx->time);  in task_clock_event_start()
11492 	perf_swevent_start_hrtimer(event);  in task_clock_event_start()
11495 static void task_clock_event_stop(struct perf_event *event, int flags)  in task_clock_event_stop()  argument
11497 	perf_swevent_cancel_hrtimer(event);  in task_clock_event_stop()
11498 	task_clock_event_update(event, event->ctx->time);  in task_clock_event_stop()
11501 static int task_clock_event_add(struct perf_event *event, int flags)  in task_clock_event_add()  argument
11504 		task_clock_event_start(event, flags);  in task_clock_event_add()
11505 	perf_event_update_userpage(event);  in task_clock_event_add()
11510 static void task_clock_event_del(struct perf_event *event, int flags)  in task_clock_event_del()  argument
11512 	task_clock_event_stop(event, PERF_EF_UPDATE);  in task_clock_event_del()
11515 static void task_clock_event_read(struct perf_event *event)  in task_clock_event_read()  argument
11518 	u64 delta = now - event->ctx->timestamp;  in task_clock_event_read()
11519 	u64 time = event->ctx->time + delta;  in task_clock_event_read()
11521 	task_clock_event_update(event, time);  in task_clock_event_read()
11524 static int task_clock_event_init(struct perf_event *event)  in task_clock_event_init()  argument
11526 	if (event->attr.type != perf_task_clock.type)  in task_clock_event_init()
11529 	if (event->attr.config != PERF_COUNT_SW_TASK_CLOCK)  in task_clock_event_init()
11535 	if (has_branch_stack(event))  in task_clock_event_init()
11538 	perf_swevent_init_hrtimer(event);  in task_clock_event_init()
11570 static int perf_event_nop_int(struct perf_event *event, u64 value)  in perf_event_nop_int()  argument
11612 static int perf_event_idx_default(struct perf_event *event)  in perf_event_idx_default()  argument
11987 static inline bool has_extended_regs(struct perf_event *event)  in has_extended_regs()  argument
11989 	return (event->attr.sample_regs_user & PERF_REG_EXTENDED_MASK) ||  in has_extended_regs()
11990 	       (event->attr.sample_regs_intr & PERF_REG_EXTENDED_MASK);  in has_extended_regs()
11993 static int perf_try_init_event(struct pmu *pmu, struct perf_event *event)  in perf_try_init_event()  argument
12004 	 * if this is a sibling event, acquire the ctx->mutex to protect  in perf_try_init_event()
12007 	if (event->group_leader != event && pmu->task_ctx_nr != perf_sw_context) {  in perf_try_init_event()
12012 		ctx = perf_event_ctx_lock_nested(event->group_leader,  in perf_try_init_event()
12017 	event->pmu = pmu;  in perf_try_init_event()
12018 	ret = pmu->event_init(event);  in perf_try_init_event()
12021 		perf_event_ctx_unlock(event->group_leader, ctx);  in perf_try_init_event()
12025 		    has_extended_regs(event))  in perf_try_init_event()
12029 		    event_has_any_exclude_flag(event))  in perf_try_init_event()
12032 		if (pmu->scope != PERF_PMU_SCOPE_NONE && event->cpu >= 0) {  in perf_try_init_event()
12033 			const struct cpumask *cpumask = perf_scope_cpu_topology_cpumask(pmu->scope, event->cpu);  in perf_try_init_event()
12042 					event->event_caps |= PERF_EV_CAP_READ_SCOPE;  in perf_try_init_event()
12048 		if (ret && event->destroy)  in perf_try_init_event()
12049 			event->destroy(event);  in perf_try_init_event()
12053 		event->pmu = NULL;  in perf_try_init_event()
12060 static struct pmu *perf_init_event(struct perf_event *event)  in perf_init_event()  argument
12070 	 * pmus overwrites event->attr.type to forward event to another pmu.  in perf_init_event()
12072 	event->orig_type = event->attr.type;  in perf_init_event()
12075 	if (event->parent && event->parent->pmu) {  in perf_init_event()
12076 		pmu = event->parent->pmu;  in perf_init_event()
12077 		ret = perf_try_init_event(pmu, event);  in perf_init_event()
12086 	type = event->attr.type;  in perf_init_event()
12088 		type = event->attr.config >> PERF_PMU_TYPE_SHIFT;  in perf_init_event()
12093 			event->attr.config &= PERF_HW_EVENT_MASK;  in perf_init_event()
12102 		if (event->attr.type != type && type != PERF_TYPE_RAW &&  in perf_init_event()
12106 		ret = perf_try_init_event(pmu, event);  in perf_init_event()
12107 		if (ret == -ENOENT && event->attr.type != type && !extended_type) {  in perf_init_event()
12108 			type = event->attr.type;  in perf_init_event()
12119 		ret = perf_try_init_event(pmu, event);  in perf_init_event()
12136 static void attach_sb_event(struct perf_event *event)  in attach_sb_event()  argument
12138 	struct pmu_event_list *pel = per_cpu_ptr(&pmu_sb_events, event->cpu);  in attach_sb_event()
12141 	list_add_rcu(&event->sb_list, &pel->list);  in attach_sb_event()
12152 static void account_pmu_sb_event(struct perf_event *event)  in account_pmu_sb_event()  argument
12154 	if (is_sb_event(event))  in account_pmu_sb_event()
12155 		attach_sb_event(event);  in account_pmu_sb_event()
12179 static void account_event(struct perf_event *event)  in account_event()  argument
12183 	if (event->parent)  in account_event()
12186 	if (event->attach_state & (PERF_ATTACH_TASK | PERF_ATTACH_SCHED_CB))  in account_event()
12188 	if (event->attr.mmap || event->attr.mmap_data)  in account_event()
12190 	if (event->attr.build_id)  in account_event()
12192 	if (event->attr.comm)  in account_event()
12194 	if (event->attr.namespaces)  in account_event()
12196 	if (event->attr.cgroup)  in account_event()
12198 	if (event->attr.task)  in account_event()
12200 	if (event->attr.freq)  in account_event()
12202 	if (event->attr.context_switch) {  in account_event()
12206 	if (has_branch_stack(event))  in account_event()
12208 	if (is_cgroup_event(event))  in account_event()
12210 	if (event->attr.ksymbol)  in account_event()
12212 	if (event->attr.bpf_event)  in account_event()
12214 	if (event->attr.text_poke)  in account_event()
12245 	account_pmu_sb_event(event);  in account_event()
12249  * Allocate and initialize an event structure
12260 	struct perf_event *event;  in perf_event_alloc()  local
12275 	event = kmem_cache_alloc_node(perf_event_cache, GFP_KERNEL | __GFP_ZERO,  in perf_event_alloc()
12277 	if (!event)  in perf_event_alloc()
12285 		group_leader = event;  in perf_event_alloc()
12287 	mutex_init(&event->child_mutex);  in perf_event_alloc()
12288 	INIT_LIST_HEAD(&event->child_list);  in perf_event_alloc()
12290 	INIT_LIST_HEAD(&event->event_entry);  in perf_event_alloc()
12291 	INIT_LIST_HEAD(&event->sibling_list);  in perf_event_alloc()
12292 	INIT_LIST_HEAD(&event->active_list);  in perf_event_alloc()
12293 	init_event_group(event);  in perf_event_alloc()
12294 	INIT_LIST_HEAD(&event->rb_entry);  in perf_event_alloc()
12295 	INIT_LIST_HEAD(&event->active_entry);  in perf_event_alloc()
12296 	INIT_LIST_HEAD(&event->addr_filters.list);  in perf_event_alloc()
12297 	INIT_HLIST_NODE(&event->hlist_entry);  in perf_event_alloc()
12300 	init_waitqueue_head(&event->waitq);  in perf_event_alloc()
12301 	init_irq_work(&event->pending_irq, perf_pending_irq);  in perf_event_alloc()
12302 	event->pending_disable_irq = IRQ_WORK_INIT_HARD(perf_pending_disable);  in perf_event_alloc()
12303 	init_task_work(&event->pending_task, perf_pending_task);  in perf_event_alloc()
12305 	mutex_init(&event->mmap_mutex);  in perf_event_alloc()
12306 	raw_spin_lock_init(&event->addr_filters.lock);  in perf_event_alloc()
12308 	atomic_long_set(&event->refcount, 1);  in perf_event_alloc()
12309 	event->cpu		= cpu;  in perf_event_alloc()
12310 	event->attr		= *attr;  in perf_event_alloc()
12311 	event->group_leader	= group_leader;  in perf_event_alloc()
12312 	event->pmu		= NULL;  in perf_event_alloc()
12313 	event->oncpu		= -1;  in perf_event_alloc()
12315 	event->parent		= parent_event;  in perf_event_alloc()
12317 	event->ns		= get_pid_ns(task_active_pid_ns(current));  in perf_event_alloc()
12318 	event->id		= atomic64_inc_return(&perf_event_id);  in perf_event_alloc()
12320 	event->state		= PERF_EVENT_STATE_INACTIVE;  in perf_event_alloc()
12323 		event->event_caps = parent_event->event_caps;  in perf_event_alloc()
12326 		event->attach_state = PERF_ATTACH_TASK;  in perf_event_alloc()
12332 		event->hw.target = get_task_struct(task);  in perf_event_alloc()
12335 	event->clock = &local_clock;  in perf_event_alloc()
12337 		event->clock = parent_event->clock;  in perf_event_alloc()
12347 			event->prog = prog;  in perf_event_alloc()
12353 		event->overflow_handler	= overflow_handler;  in perf_event_alloc()
12354 		event->overflow_handler_context = context;  in perf_event_alloc()
12355 	} else if (is_write_backward(event)){  in perf_event_alloc()
12356 		event->overflow_handler = perf_event_output_backward;  in perf_event_alloc()
12357 		event->overflow_handler_context = NULL;  in perf_event_alloc()
12359 		event->overflow_handler = perf_event_output_forward;  in perf_event_alloc()
12360 		event->overflow_handler_context = NULL;  in perf_event_alloc()
12363 	perf_event__state_init(event);  in perf_event_alloc()
12367 	hwc = &event->hw;  in perf_event_alloc()
12384 	if (!has_branch_stack(event))  in perf_event_alloc()
12385 		event->attr.branch_sample_type = 0;  in perf_event_alloc()
12387 	pmu = perf_init_event(event);  in perf_event_alloc()
12403 	if (event->attr.aux_output &&  in perf_event_alloc()
12405 	     event->attr.aux_pause || event->attr.aux_resume)) {  in perf_event_alloc()
12410 	if (event->attr.aux_pause && event->attr.aux_resume) {  in perf_event_alloc()
12415 	if (event->attr.aux_start_paused) {  in perf_event_alloc()
12420 		event->hw.aux_paused = 1;  in perf_event_alloc()
12424 		err = perf_cgroup_connect(cgroup_fd, event, attr, group_leader);  in perf_event_alloc()
12429 	err = exclusive_event_init(event);  in perf_event_alloc()
12433 	if (has_addr_filter(event)) {  in perf_event_alloc()
12434 		event->addr_filter_ranges = kcalloc(pmu->nr_addr_filters,  in perf_event_alloc()
12437 		if (!event->addr_filter_ranges) {  in perf_event_alloc()
12446 		if (event->parent) {  in perf_event_alloc()
12447 			struct perf_addr_filters_head *ifh = perf_event_addr_filters(event);  in perf_event_alloc()
12450 			memcpy(event->addr_filter_ranges,  in perf_event_alloc()
12451 			       event->parent->addr_filter_ranges,  in perf_event_alloc()
12457 		event->addr_filters_gen = 1;  in perf_event_alloc()
12460 	if (!event->parent) {  in perf_event_alloc()
12461 		if (event->attr.sample_type & PERF_SAMPLE_CALLCHAIN) {  in perf_event_alloc()
12465 			event->attach_state |= PERF_ATTACH_CALLCHAIN;  in perf_event_alloc()
12469 	err = security_perf_event_alloc(event);  in perf_event_alloc()
12474 	account_event(event);  in perf_event_alloc()
12476 	return event;  in perf_event_alloc()
12479 	__free_event(event);  in perf_event_alloc()
12619 perf_event_set_output(struct perf_event *event, struct perf_event *output_event)  in perf_event_set_output()  argument
12625 		mutex_lock(&event->mmap_mutex);  in perf_event_set_output()
12630 	if (event == output_event)  in perf_event_set_output()
12636 	if (output_event->cpu != event->cpu)  in perf_event_set_output()
12642 	if (output_event->cpu == -1 && output_event->hw.target != event->hw.target)  in perf_event_set_output()
12648 	if (output_event->clock != event->clock)  in perf_event_set_output()
12655 	if (is_write_backward(output_event) != is_write_backward(event))  in perf_event_set_output()
12661 	if (has_aux(event) && has_aux(output_event) &&  in perf_event_set_output()
12662 	    event->pmu != output_event->pmu)  in perf_event_set_output()
12668 	 * restarts after every removal, it is guaranteed this new event is  in perf_event_set_output()
12672 	mutex_lock_double(&event->mmap_mutex, &output_event->mmap_mutex);  in perf_event_set_output()
12675 	if (atomic_read(&event->mmap_count))  in perf_event_set_output()
12691 	ring_buffer_attach(event, rb);  in perf_event_set_output()
12695 	mutex_unlock(&event->mmap_mutex);  in perf_event_set_output()
12703 static int perf_event_set_clock(struct perf_event *event, clockid_t clk_id)  in perf_event_set_clock()  argument
12709 		event->clock = &ktime_get_mono_fast_ns;  in perf_event_set_clock()
12714 		event->clock = &ktime_get_raw_fast_ns;  in perf_event_set_clock()
12719 		event->clock = &ktime_get_real_ns;  in perf_event_set_clock()
12723 		event->clock = &ktime_get_boottime_ns;  in perf_event_set_clock()
12727 		event->clock = &ktime_get_clocktai_ns;  in perf_event_set_clock()
12734 	if (!nmi_safe && !(event->pmu->capabilities & PERF_PMU_CAP_NO_NMI))  in perf_event_set_clock()
12772  * sys_perf_event_open - open a performance event, associate it to a task/cpu
12777  * @group_fd:		group leader event fd
12778  * @flags:		perf event open flags
12786 	struct perf_event *event, *sibling;  in SYSCALL_DEFINE5()  local
12890 	event = perf_event_alloc(&attr, cpu, task, group_leader, NULL,  in SYSCALL_DEFINE5()
12892 	if (IS_ERR(event)) {  in SYSCALL_DEFINE5()
12893 		err = PTR_ERR(event);  in SYSCALL_DEFINE5()
12897 	if (is_sampling_event(event)) {  in SYSCALL_DEFINE5()
12898 		if (event->pmu->capabilities & PERF_PMU_CAP_NO_INTERRUPT) {  in SYSCALL_DEFINE5()
12908 	pmu = event->pmu;  in SYSCALL_DEFINE5()
12911 		err = perf_event_set_clock(event, attr.clockid);  in SYSCALL_DEFINE5()
12917 		event->event_caps |= PERF_EV_CAP_SOFTWARE;  in SYSCALL_DEFINE5()
12926 		 * perf_install_in_context() call for this new event to  in SYSCALL_DEFINE5()
12938 	ctx = find_get_context(task, event);  in SYSCALL_DEFINE5()
12953 		 * Check if the @cpu we're creating an event for is online.  in SYSCALL_DEFINE5()
12958 		struct perf_cpu_context *cpuctx = per_cpu_ptr(&perf_cpu_context, event->cpu);  in SYSCALL_DEFINE5()
12977 		if (group_leader->clock != event->clock)  in SYSCALL_DEFINE5()
12985 		if (group_leader->cpu != event->cpu)  in SYSCALL_DEFINE5()
13000 		if (is_software_event(event) &&  in SYSCALL_DEFINE5()
13003 			 * If the event is a sw event, but the group_leader  in SYSCALL_DEFINE5()
13014 		} else if (!is_software_event(event)) {  in SYSCALL_DEFINE5()
13019 				 * try to add a hardware event, move the whole group to  in SYSCALL_DEFINE5()
13035 	pmu_ctx = find_get_pmu_context(pmu, ctx, event);  in SYSCALL_DEFINE5()
13040 	event->pmu_ctx = pmu_ctx;  in SYSCALL_DEFINE5()
13043 		err = perf_event_set_output(event, output_event);  in SYSCALL_DEFINE5()
13048 	if (!perf_event_validate_size(event)) {  in SYSCALL_DEFINE5()
13053 	if (perf_need_aux_event(event) && !perf_get_aux_event(event, group_leader)) {  in SYSCALL_DEFINE5()
13060 	 * because we need to serialize with concurrent event creation.  in SYSCALL_DEFINE5()
13062 	if (!exclusive_event_installable(event, ctx)) {  in SYSCALL_DEFINE5()
13069 	event_file = anon_inode_getfile("[perf_event]", &perf_fops, event, f_flags);  in SYSCALL_DEFINE5()
13109 		 * event. What we want here is event in the initial  in SYSCALL_DEFINE5()
13121 	 * perf_install_in_context() which is the point the event is active and  in SYSCALL_DEFINE5()
13124 	perf_event__header_size(event);  in SYSCALL_DEFINE5()
13125 	perf_event__id_header_size(event);  in SYSCALL_DEFINE5()
13127 	event->owner = current;  in SYSCALL_DEFINE5()
13129 	perf_install_in_context(ctx, event, event->cpu);  in SYSCALL_DEFINE5()
13140 	list_add_tail(&event->owner_entry, &current->perf_event_list);  in SYSCALL_DEFINE5()
13145 	 * kept alive until we place the new event on the sibling_list.  in SYSCALL_DEFINE5()
13153 	put_pmu_ctx(event->pmu_ctx);  in SYSCALL_DEFINE5()
13154 	event->pmu_ctx = NULL; /* _free_event() */  in SYSCALL_DEFINE5()
13163 	free_event(event);  in SYSCALL_DEFINE5()
13178  * @overflow_handler: callback to trigger when we hit the event
13189 	struct perf_event *event;  in perf_event_create_kernel_counter()  local
13200 	event = perf_event_alloc(attr, cpu, task, NULL, NULL,  in perf_event_create_kernel_counter()
13202 	if (IS_ERR(event)) {  in perf_event_create_kernel_counter()
13203 		err = PTR_ERR(event);  in perf_event_create_kernel_counter()
13208 	event->owner = TASK_TOMBSTONE;  in perf_event_create_kernel_counter()
13209 	pmu = event->pmu;  in perf_event_create_kernel_counter()
13212 		event->event_caps |= PERF_EV_CAP_SOFTWARE;  in perf_event_create_kernel_counter()
13217 	ctx = find_get_context(task, event);  in perf_event_create_kernel_counter()
13230 	pmu_ctx = find_get_pmu_context(pmu, ctx, event);  in perf_event_create_kernel_counter()
13235 	event->pmu_ctx = pmu_ctx;  in perf_event_create_kernel_counter()
13239 		 * Check if the @cpu we're creating an event for is online.  in perf_event_create_kernel_counter()
13252 	if (!exclusive_event_installable(event, ctx)) {  in perf_event_create_kernel_counter()
13257 	perf_install_in_context(ctx, event, event->cpu);  in perf_event_create_kernel_counter()
13261 	return event;  in perf_event_create_kernel_counter()
13265 	event->pmu_ctx = NULL; /* _free_event() */  in perf_event_create_kernel_counter()
13271 	free_event(event);  in perf_event_create_kernel_counter()
13282 	struct perf_event *event, *sibling;  in __perf_pmu_remove()  local
13284 	perf_event_groups_for_cpu_pmu(event, groups, cpu, pmu) {  in __perf_pmu_remove()
13285 		perf_remove_from_context(event, 0);  in __perf_pmu_remove()
13286 		put_pmu_ctx(event->pmu_ctx);  in __perf_pmu_remove()
13287 		list_add(&event->migrate_entry, events);  in __perf_pmu_remove()
13289 		for_each_sibling_event(sibling, event) {  in __perf_pmu_remove()
13299 				     int cpu, struct perf_event *event)  in __perf_pmu_install_event()  argument
13302 	struct perf_event_context *old_ctx = event->ctx;  in __perf_pmu_install_event()
13306 	event->cpu = cpu;  in __perf_pmu_install_event()
13307 	epc = find_get_pmu_context(pmu, ctx, event);  in __perf_pmu_install_event()
13308 	event->pmu_ctx = epc;  in __perf_pmu_install_event()
13310 	if (event->state >= PERF_EVENT_STATE_OFF)  in __perf_pmu_install_event()
13311 		event->state = PERF_EVENT_STATE_INACTIVE;  in __perf_pmu_install_event()
13312 	perf_install_in_context(ctx, event, cpu);  in __perf_pmu_install_event()
13315 	 * Now that event->ctx is updated and visible, put the old ctx.  in __perf_pmu_install_event()
13323 	struct perf_event *event, *tmp;  in __perf_pmu_install()  local
13333 	list_for_each_entry_safe(event, tmp, events, migrate_entry) {  in __perf_pmu_install()
13334 		if (event->group_leader == event)  in __perf_pmu_install()
13337 		list_del(&event->migrate_entry);  in __perf_pmu_install()
13338 		__perf_pmu_install_event(pmu, ctx, cpu, event);  in __perf_pmu_install()
13345 	list_for_each_entry_safe(event, tmp, events, migrate_entry) {  in __perf_pmu_install()
13346 		list_del(&event->migrate_entry);  in __perf_pmu_install()
13347 		__perf_pmu_install_event(pmu, ctx, cpu, event);  in __perf_pmu_install()
13411 perf_event_exit_event(struct perf_event *event, struct perf_event_context *ctx)  in perf_event_exit_event()  argument
13413 	struct perf_event *parent_event = event->parent;  in perf_event_exit_event()
13433 	perf_remove_from_context(event, detach_flags | DETACH_EXIT);  in perf_event_exit_event()
13444 		put_event(event);  in perf_event_exit_event()
13451 	perf_event_wakeup(event);  in perf_event_exit_event()
13516  * When a child task exits, feed back event values to parent events.
13523 	struct perf_event *event, *tmp;  in perf_event_exit_task()  local
13526 	list_for_each_entry_safe(event, tmp, &child->perf_event_list,  in perf_event_exit_task()
13528 		list_del_init(&event->owner_entry);  in perf_event_exit_task()
13535 		smp_store_release(&event->owner, NULL);  in perf_event_exit_task()
13550 static void perf_free_event(struct perf_event *event,  in perf_free_event()  argument
13553 	struct perf_event *parent = event->parent;  in perf_free_event()
13559 	list_del_init(&event->child_list);  in perf_free_event()
13563 	perf_group_detach(event);  in perf_free_event()
13564 	list_del_event(event, ctx);  in perf_free_event()
13566 	put_event(event);  in perf_free_event()
13579 	struct perf_event *event, *tmp;  in perf_event_free_task()  local
13599 	list_for_each_entry_safe(event, tmp, &ctx->event_list, event_entry)  in perf_event_free_task()
13600 		perf_free_event(event, ctx);  in perf_event_free_task()
13613 	 * _free_event()'s put_task_struct(event->hw.target) will be a  in perf_event_free_task()
13649 const struct perf_event_attr *perf_event_attrs(struct perf_event *event)  in perf_event_attrs()  argument
13651 	if (!event)  in perf_event_attrs()
13654 	return &event->attr;  in perf_event_attrs()
13667  * Inherit an event from parent task to child task.
13729 	 * Make the child state follow the state of the parent event,  in inherit_event()
13768 	 * Link this into the parent event's child list  in inherit_event()
13777  * Inherits an event group.
13821  * Creates the child task context and tries to inherit the event-group.
13824  * inherited_all set when we 'fail' to inherit an orphaned event; this is
13832 inherit_task_group(struct perf_event *event, struct task_struct *parent,  in inherit_task_group()  argument
13840 	if (!event->attr.inherit ||  in inherit_task_group()
13841 	    (event->attr.inherit_thread && !(clone_flags & CLONE_THREAD)) ||  in inherit_task_group()
13843 	    (event->attr.sigtrap && (clone_flags & CLONE_CLEAR_SIGHAND))) {  in inherit_task_group()
13863 	ret = inherit_group(event, parent, parent_ctx, child, child_ctx);  in inherit_task_group()
13877 	struct perf_event *event;  in perf_event_init_context()  local
13911 	perf_event_groups_for_each(event, &parent_ctx->pinned_groups) {  in perf_event_init_context()
13912 		ret = inherit_task_group(event, parent, parent_ctx,  in perf_event_init_context()
13927 	perf_event_groups_for_each(event, &parent_ctx->flexible_groups) {  in perf_event_init_context()
13928 		ret = inherit_task_group(event, parent, parent_ctx,  in perf_event_init_context()
14043 	struct perf_event *event;  in __perf_event_exit_context()  local
14047 	list_for_each_entry(event, &ctx->event_list, event_entry)  in __perf_event_exit_context()
14048 		__perf_remove_from_context(event, cpuctx, ctx, (void *)DETACH_GROUP);  in __perf_event_exit_context()