182 static bool is_kernel_event(struct perf_event *event)  in is_kernel_event()  argument
184 	return READ_ONCE(event->owner) == TASK_TOMBSTONE;  in is_kernel_event()
196  *  - removing the last event from a task ctx; this is relatively straight
199  *  - adding the first event to a task ctx; this is tricky because we cannot
210 	struct perf_event *event;  member
218 	struct perf_event *event = efs->event;  in event_function()  local
219 	struct perf_event_context *ctx = event->ctx;  in event_function()
254 	efs->func(event, cpuctx, ctx, efs->data);  in event_function()
261 static void event_function_call(struct perf_event *event, event_f func, void *data)  in event_function_call()  argument
263 	struct perf_event_context *ctx = event->ctx;  in event_function_call()
266 		.event = event,  in event_function_call()
271 	if (!event->parent) {  in event_function_call()
273 		 * If this is a !child event, we must hold ctx::mutex to  in event_function_call()
274 		 * stabilize the event->ctx relation. See  in event_function_call()
281 		cpu_function_call(event->cpu, event_function, &efs);  in event_function_call()
306 	func(event, NULL, ctx, data);  in event_function_call()
314 static void event_function_local(struct perf_event *event, event_f func, void *data)  in event_function_local()  argument
316 	struct perf_event_context *ctx = event->ctx;  in event_function_local()
353 	func(event, cpuctx, ctx, data);  in event_function_local()
413  * perf event paranoia level:
425  * max perf event sample rate
581 static u64 perf_event_time(struct perf_event *event);
590 static inline u64 perf_event_clock(struct perf_event *event)  in perf_event_clock()  argument
592 	return event->clock();  in perf_event_clock()
596  * State based event timekeeping...
598  * The basic idea is to use event->state to determine which (if any) time
603  * Event groups make things a little more complicated, but not terribly so. The
618 __perf_effective_state(struct perf_event *event)  in __perf_effective_state()  argument
620 	struct perf_event *leader = event->group_leader;  in __perf_effective_state()
625 	return event->state;  in __perf_effective_state()
629 __perf_update_times(struct perf_event *event, u64 now, u64 *enabled, u64 *running)  in __perf_update_times()  argument
631 	enum perf_event_state state = __perf_effective_state(event);  in __perf_update_times()
632 	u64 delta = now - event->tstamp;  in __perf_update_times()
634 	*enabled = event->total_time_enabled;  in __perf_update_times()
638 	*running = event->total_time_running;  in __perf_update_times()
643 static void perf_event_update_time(struct perf_event *event)  in perf_event_update_time()  argument
645 	u64 now = perf_event_time(event);  in perf_event_update_time()
647 	__perf_update_times(event, now, &event->total_time_enabled,  in perf_event_update_time()
648 					&event->total_time_running);  in perf_event_update_time()
649 	event->tstamp = now;  in perf_event_update_time()
661 perf_event_set_state(struct perf_event *event, enum perf_event_state state)  in perf_event_set_state()  argument
663 	if (event->state == state)  in perf_event_set_state()
666 	perf_event_update_time(event);  in perf_event_set_state()
671 	if ((event->state < 0) ^ (state < 0))  in perf_event_set_state()
672 		perf_event_update_sibling_time(event);  in perf_event_set_state()
674 	WRITE_ONCE(event->state, state);  in perf_event_set_state()
697 perf_cgroup_match(struct perf_event *event)  in perf_cgroup_match()  argument
699 	struct perf_event_context *ctx = event->ctx;  in perf_cgroup_match()
702 	/* @event doesn't care about cgroup */  in perf_cgroup_match()
703 	if (!event->cgrp)  in perf_cgroup_match()
711 	 * Cgroup scoping is recursive.  An event enabled for a cgroup is  in perf_cgroup_match()
713 	 * cgroup is a descendant of @event's (the test covers identity  in perf_cgroup_match()
717 				    event->cgrp->css.cgroup);  in perf_cgroup_match()
720 static inline void perf_detach_cgroup(struct perf_event *event)  in perf_detach_cgroup()  argument
722 	css_put(&event->cgrp->css);  in perf_detach_cgroup()
723 	event->cgrp = NULL;  in perf_detach_cgroup()
726 static inline int is_cgroup_event(struct perf_event *event)  in is_cgroup_event()  argument
728 	return event->cgrp != NULL;  in is_cgroup_event()
731 static inline u64 perf_cgroup_event_time(struct perf_event *event)  in perf_cgroup_event_time()  argument
735 	t = per_cpu_ptr(event->cgrp->info, event->cpu);  in perf_cgroup_event_time()
739 static inline u64 perf_cgroup_event_time_now(struct perf_event *event, u64 now)  in perf_cgroup_event_time_now()  argument
743 	t = per_cpu_ptr(event->cgrp->info, event->cpu);  in perf_cgroup_event_time_now()
781 static inline void update_cgrp_time_from_event(struct perf_event *event)  in update_cgrp_time_from_event()  argument
789 	if (!is_cgroup_event(event))  in update_cgrp_time_from_event()
792 	info = this_cpu_ptr(event->cgrp->info);  in update_cgrp_time_from_event()
876 static int perf_cgroup_ensure_storage(struct perf_event *event,  in perf_cgroup_ensure_storage()  argument
891 		cpuctx = per_cpu_ptr(event->pmu->pmu_cpu_context, cpu);  in perf_cgroup_ensure_storage()
917 static inline int perf_cgroup_connect(int fd, struct perf_event *event,  in perf_cgroup_connect()  argument
936 	ret = perf_cgroup_ensure_storage(event, css);  in perf_cgroup_connect()
941 	event->cgrp = cgrp;  in perf_cgroup_connect()
949 		perf_detach_cgroup(event);  in perf_cgroup_connect()
958 perf_cgroup_event_enable(struct perf_event *event, struct perf_event_context *ctx)  in perf_cgroup_event_enable()  argument
962 	if (!is_cgroup_event(event))  in perf_cgroup_event_enable()
976 			per_cpu_ptr(&cgrp_cpuctx_list, event->cpu));  in perf_cgroup_event_enable()
980 perf_cgroup_event_disable(struct perf_event *event, struct perf_event_context *ctx)  in perf_cgroup_event_disable()  argument
984 	if (!is_cgroup_event(event))  in perf_cgroup_event_disable()
1003 perf_cgroup_match(struct perf_event *event)  in perf_cgroup_match()  argument
1008 static inline void perf_detach_cgroup(struct perf_event *event)  in perf_detach_cgroup()  argument
1011 static inline int is_cgroup_event(struct perf_event *event)  in is_cgroup_event()  argument
1016 static inline void update_cgrp_time_from_event(struct perf_event *event)  in update_cgrp_time_from_event()  argument
1025 static inline int perf_cgroup_connect(pid_t pid, struct perf_event *event,  in perf_cgroup_connect()  argument
1037 static inline u64 perf_cgroup_event_time(struct perf_event *event)  in perf_cgroup_event_time()  argument
1042 static inline u64 perf_cgroup_event_time_now(struct perf_event *event, u64 now)  in perf_cgroup_event_time_now()  argument
1048 perf_cgroup_event_enable(struct perf_event *event, struct perf_event_context *ctx)  in perf_cgroup_event_enable()  argument
1053 perf_cgroup_event_disable(struct perf_event *event, struct perf_event_context *ctx)  in perf_cgroup_event_disable()  argument
1249  * because the sys_perf_event_open() case will install a new event and break
1260  * quiesce the event, after which we can install it in the new location. This
1261  * means that only external vectors (perf_fops, prctl) can perturb the event
1265  * However; because event->ctx can change while we're waiting to acquire
1284 perf_event_ctx_lock_nested(struct perf_event *event, int nesting)  in perf_event_ctx_lock_nested()  argument
1290 	ctx = READ_ONCE(event->ctx);  in perf_event_ctx_lock_nested()
1298 	if (event->ctx != ctx) {  in perf_event_ctx_lock_nested()
1308 perf_event_ctx_lock(struct perf_event *event)  in perf_event_ctx_lock()  argument
1310 	return perf_event_ctx_lock_nested(event, 0);  in perf_event_ctx_lock()
1313 static void perf_event_ctx_unlock(struct perf_event *event,  in perf_event_ctx_unlock()  argument
1339 static u32 perf_event_pid_type(struct perf_event *event, struct task_struct *p,  in perf_event_pid_type()  argument
1346 	if (event->parent)  in perf_event_pid_type()
1347 		event = event->parent;  in perf_event_pid_type()
1349 	nr = __task_pid_nr_ns(p, type, event->ns);  in perf_event_pid_type()
1356 static u32 perf_event_pid(struct perf_event *event, struct task_struct *p)  in perf_event_pid()  argument
1358 	return perf_event_pid_type(event, p, PIDTYPE_TGID);  in perf_event_pid()
1361 static u32 perf_event_tid(struct perf_event *event, struct task_struct *p)  in perf_event_tid()  argument
1363 	return perf_event_pid_type(event, p, PIDTYPE_PID);  in perf_event_tid()
1367  * If we inherit events we want to return the parent event id
1370 static u64 primary_event_id(struct perf_event *event)  in primary_event_id()  argument
1372 	u64 id = event->id;  in primary_event_id()
1374 	if (event->parent)  in primary_event_id()
1375 		id = event->parent->id;  in primary_event_id()
1495 static u64 perf_event_time(struct perf_event *event)  in perf_event_time()  argument
1497 	struct perf_event_context *ctx = event->ctx;  in perf_event_time()
1502 	if (is_cgroup_event(event))  in perf_event_time()
1503 		return perf_cgroup_event_time(event);  in perf_event_time()
1508 static u64 perf_event_time_now(struct perf_event *event, u64 now)  in perf_event_time_now()  argument
1510 	struct perf_event_context *ctx = event->ctx;  in perf_event_time_now()
1515 	if (is_cgroup_event(event))  in perf_event_time_now()
1516 		return perf_cgroup_event_time_now(event, now);  in perf_event_time_now()
1525 static enum event_type_t get_event_type(struct perf_event *event)  in get_event_type()  argument
1527 	struct perf_event_context *ctx = event->ctx;  in get_event_type()
1536 	if (event->group_leader != event)  in get_event_type()
1537 		event = event->group_leader;  in get_event_type()
1539 	event_type = event->attr.pinned ? EVENT_PINNED : EVENT_FLEXIBLE;  in get_event_type()
1547  * Helper function to initialize event group nodes.
1549 static void init_event_group(struct perf_event *event)  in init_event_group()  argument
1551 	RB_CLEAR_NODE(&event->group_node);  in init_event_group()
1552 	event->group_index = 0;  in init_event_group()
1557  * based on event attrs bits.
1560 get_event_groups(struct perf_event *event, struct perf_event_context *ctx)  in get_event_groups()  argument
1562 	if (event->attr.pinned)  in get_event_groups()
1577 static inline struct cgroup *event_cgroup(const struct perf_event *event)  in event_cgroup()  argument
1582 	if (event->cgrp)  in event_cgroup()
1583 		cgroup = event->cgrp->css.cgroup;  in event_cgroup()
1590  * Compare function for event groups;
1665  * Insert @event into @groups' tree; using {@event->cpu, ++@groups->index} for
1671 			 struct perf_event *event)  in perf_event_groups_insert()  argument
1673 	event->group_index = ++groups->index;  in perf_event_groups_insert()
1675 	rb_add(&event->group_node, &groups->tree, __group_less);  in perf_event_groups_insert()
1679  * Helper function to insert event into the pinned or flexible groups.
1682 add_event_to_groups(struct perf_event *event, struct perf_event_context *ctx)  in add_event_to_groups()  argument
1686 	groups = get_event_groups(event, ctx);  in add_event_to_groups()
1687 	perf_event_groups_insert(groups, event);  in add_event_to_groups()
1695 			 struct perf_event *event)  in perf_event_groups_delete()  argument
1697 	WARN_ON_ONCE(RB_EMPTY_NODE(&event->group_node) ||  in perf_event_groups_delete()
1700 	rb_erase(&event->group_node, &groups->tree);  in perf_event_groups_delete()
1701 	init_event_group(event);  in perf_event_groups_delete()
1705  * Helper function to delete event from its groups.
1708 del_event_from_groups(struct perf_event *event, struct perf_event_context *ctx)  in del_event_from_groups()  argument
1712 	groups = get_event_groups(event, ctx);  in del_event_from_groups()
1713 	perf_event_groups_delete(groups, event);  in del_event_from_groups()
1717  * Get the leftmost event in the cpu/cgroup subtree.
1740 perf_event_groups_next(struct perf_event *event)  in perf_event_groups_next()  argument
1743 		.cpu = event->cpu,  in perf_event_groups_next()
1744 		.cgroup = event_cgroup(event),  in perf_event_groups_next()
1748 	next = rb_next_match(&key, &event->group_node, __group_cmp);  in perf_event_groups_next()
1758 #define perf_event_groups_for_each(event, groups)			\  argument
1759 	for (event = rb_entry_safe(rb_first(&((groups)->tree)),		\
1760 				typeof(*event), group_node); event;	\
1761 		event = rb_entry_safe(rb_next(&event->group_node),	\
1762 				typeof(*event), group_node))
1765  * Add an event from the lists for its context.
1769 list_add_event(struct perf_event *event, struct perf_event_context *ctx)  in list_add_event()  argument
1773 	WARN_ON_ONCE(event->attach_state & PERF_ATTACH_CONTEXT);  in list_add_event()
1774 	event->attach_state |= PERF_ATTACH_CONTEXT;  in list_add_event()
1776 	event->tstamp = perf_event_time(event);  in list_add_event()
1779 	 * If we're a stand alone event or group leader, we go to the context  in list_add_event()
1783 	if (event->group_leader == event) {  in list_add_event()
1784 		event->group_caps = event->event_caps;  in list_add_event()
1785 		add_event_to_groups(event, ctx);  in list_add_event()
1788 	list_add_rcu(&event->event_entry, &ctx->event_list);  in list_add_event()
1790 	if (event->hw.flags & PERF_EVENT_FLAG_USER_READ_CNT)  in list_add_event()
1792 	if (event->attr.inherit_stat)  in list_add_event()
1795 	if (event->state > PERF_EVENT_STATE_OFF)  in list_add_event()
1796 		perf_cgroup_event_enable(event, ctx);  in list_add_event()
1802  * Initialize event state based on the perf_event_attr::disabled.
1804 static inline void perf_event__state_init(struct perf_event *event)  in perf_event__state_init()  argument
1806 	event->state = event->attr.disabled ? PERF_EVENT_STATE_OFF :  in perf_event__state_init()
1810 static void __perf_event_read_size(struct perf_event *event, int nr_siblings)  in __perf_event_read_size()  argument
1816 	if (event->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)  in __perf_event_read_size()
1819 	if (event->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)  in __perf_event_read_size()
1822 	if (event->attr.read_format & PERF_FORMAT_ID)  in __perf_event_read_size()
1825 	if (event->attr.read_format & PERF_FORMAT_LOST)  in __perf_event_read_size()
1828 	if (event->attr.read_format & PERF_FORMAT_GROUP) {  in __perf_event_read_size()
1834 	event->read_size = size;  in __perf_event_read_size()
1837 static void __perf_event_header_size(struct perf_event *event, u64 sample_type)  in __perf_event_header_size()  argument
1855 		size += event->read_size;  in __perf_event_header_size()
1875 	event->header_size = size;  in __perf_event_header_size()
1882 static void perf_event__header_size(struct perf_event *event)  in perf_event__header_size()  argument
1884 	__perf_event_read_size(event,  in perf_event__header_size()
1885 			       event->group_leader->nr_siblings);  in perf_event__header_size()
1886 	__perf_event_header_size(event, event->attr.sample_type);  in perf_event__header_size()
1889 static void perf_event__id_header_size(struct perf_event *event)  in perf_event__id_header_size()  argument
1892 	u64 sample_type = event->attr.sample_type;  in perf_event__id_header_size()
1913 	event->id_header_size = size;  in perf_event__id_header_size()
1916 static bool perf_event_validate_size(struct perf_event *event)  in perf_event_validate_size()  argument
1920 	 * attach the event.  in perf_event_validate_size()
1922 	__perf_event_read_size(event, event->group_leader->nr_siblings + 1);  in perf_event_validate_size()
1923 	__perf_event_header_size(event, event->attr.sample_type & ~PERF_SAMPLE_READ);  in perf_event_validate_size()
1924 	perf_event__id_header_size(event);  in perf_event_validate_size()
1930 	if (event->read_size + event->header_size +  in perf_event_validate_size()
1931 	    event->id_header_size + sizeof(struct perf_event_header) >= 16*1024)  in perf_event_validate_size()
1937 static void perf_group_attach(struct perf_event *event)  in perf_group_attach()  argument
1939 	struct perf_event *group_leader = event->group_leader, *pos;  in perf_group_attach()
1941 	lockdep_assert_held(&event->ctx->lock);  in perf_group_attach()
1946 	if (event->attach_state & PERF_ATTACH_GROUP)  in perf_group_attach()
1949 	event->attach_state |= PERF_ATTACH_GROUP;  in perf_group_attach()
1951 	if (group_leader == event)  in perf_group_attach()
1954 	WARN_ON_ONCE(group_leader->ctx != event->ctx);  in perf_group_attach()
1956 	group_leader->group_caps &= event->event_caps;  in perf_group_attach()
1958 	list_add_tail(&event->sibling_list, &group_leader->sibling_list);  in perf_group_attach()
1968  * Remove an event from the lists for its context.
1972 list_del_event(struct perf_event *event, struct perf_event_context *ctx)  in list_del_event()  argument
1974 	WARN_ON_ONCE(event->ctx != ctx);  in list_del_event()
1980 	if (!(event->attach_state & PERF_ATTACH_CONTEXT))  in list_del_event()
1983 	event->attach_state &= ~PERF_ATTACH_CONTEXT;  in list_del_event()
1986 	if (event->hw.flags & PERF_EVENT_FLAG_USER_READ_CNT)  in list_del_event()
1988 	if (event->attr.inherit_stat)  in list_del_event()
1991 	list_del_rcu(&event->event_entry);  in list_del_event()
1993 	if (event->group_leader == event)  in list_del_event()
1994 		del_event_from_groups(event, ctx);  in list_del_event()
1997 	 * If event was in error state, then keep it  in list_del_event()
2001 	 * of the event  in list_del_event()
2003 	if (event->state > PERF_EVENT_STATE_OFF) {  in list_del_event()
2004 		perf_cgroup_event_disable(event, ctx);  in list_del_event()
2005 		perf_event_set_state(event, PERF_EVENT_STATE_OFF);  in list_del_event()
2012 perf_aux_output_match(struct perf_event *event, struct perf_event *aux_event)  in perf_aux_output_match()  argument
2017 	if (!event->pmu->aux_output_match)  in perf_aux_output_match()
2020 	return event->pmu->aux_output_match(aux_event);  in perf_aux_output_match()
2023 static void put_event(struct perf_event *event);
2024 static void event_sched_out(struct perf_event *event,
2028 static void perf_put_aux_event(struct perf_event *event)  in perf_put_aux_event()  argument
2030 	struct perf_event_context *ctx = event->ctx;  in perf_put_aux_event()
2035 	 * If event uses aux_event tear down the link  in perf_put_aux_event()
2037 	if (event->aux_event) {  in perf_put_aux_event()
2038 		iter = event->aux_event;  in perf_put_aux_event()
2039 		event->aux_event = NULL;  in perf_put_aux_event()
2045 	 * If the event is an aux_event, tear down all links to  in perf_put_aux_event()
2048 	for_each_sibling_event(iter, event->group_leader) {  in perf_put_aux_event()
2049 		if (iter->aux_event != event)  in perf_put_aux_event()
2053 		put_event(event);  in perf_put_aux_event()
2061 		perf_event_set_state(event, PERF_EVENT_STATE_ERROR);  in perf_put_aux_event()
2065 static bool perf_need_aux_event(struct perf_event *event)  in perf_need_aux_event()  argument
2067 	return !!event->attr.aux_output || !!event->attr.aux_sample_size;  in perf_need_aux_event()
2070 static int perf_get_aux_event(struct perf_event *event,  in perf_get_aux_event()  argument
2074 	 * Our group leader must be an aux event if we want to be  in perf_get_aux_event()
2075 	 * an aux_output. This way, the aux event will precede its  in perf_get_aux_event()
2085 	if (event->attr.aux_output && event->attr.aux_sample_size)  in perf_get_aux_event()
2088 	if (event->attr.aux_output &&  in perf_get_aux_event()
2089 	    !perf_aux_output_match(event, group_leader))  in perf_get_aux_event()
2092 	if (event->attr.aux_sample_size && !group_leader->pmu->snapshot_aux)  in perf_get_aux_event()
2099 	 * Link aux_outputs to their aux event; this is undone in  in perf_get_aux_event()
2104 	event->aux_event = group_leader;  in perf_get_aux_event()
2109 static inline struct list_head *get_event_list(struct perf_event *event)  in get_event_list()  argument
2111 	struct perf_event_context *ctx = event->ctx;  in get_event_list()
2112 	return event->attr.pinned ? &ctx->pinned_active : &ctx->flexible_active;  in get_event_list()
2121 static inline void perf_remove_sibling_event(struct perf_event *event)  in perf_remove_sibling_event()  argument
2123 	struct perf_event_context *ctx = event->ctx;  in perf_remove_sibling_event()
2126 	event_sched_out(event, cpuctx, ctx);  in perf_remove_sibling_event()
2127 	perf_event_set_state(event, PERF_EVENT_STATE_ERROR);  in perf_remove_sibling_event()
2130 static void perf_group_detach(struct perf_event *event)  in perf_group_detach()  argument
2132 	struct perf_event *leader = event->group_leader;  in perf_group_detach()
2134 	struct perf_event_context *ctx = event->ctx;  in perf_group_detach()
2141 	if (!(event->attach_state & PERF_ATTACH_GROUP))  in perf_group_detach()
2144 	event->attach_state &= ~PERF_ATTACH_GROUP;  in perf_group_detach()
2146 	perf_put_aux_event(event);  in perf_group_detach()
2151 	if (leader != event) {  in perf_group_detach()
2152 		list_del_init(&event->sibling_list);  in perf_group_detach()
2153 		event->group_leader->nr_siblings--;  in perf_group_detach()
2158 	 * If this was a group event with sibling events then  in perf_group_detach()
2162 	list_for_each_entry_safe(sibling, tmp, &event->sibling_list, sibling_list) {  in perf_group_detach()
2171 		sibling->group_caps = event->group_caps;  in perf_group_detach()
2173 		if (!RB_EMPTY_NODE(&event->group_node)) {  in perf_group_detach()
2174 			add_event_to_groups(sibling, event->ctx);  in perf_group_detach()
2180 		WARN_ON_ONCE(sibling->ctx != event->ctx);  in perf_group_detach()
2192 static void perf_child_detach(struct perf_event *event)  in perf_child_detach()  argument
2194 	struct perf_event *parent_event = event->parent;  in perf_child_detach()
2196 	if (!(event->attach_state & PERF_ATTACH_CHILD))  in perf_child_detach()
2199 	event->attach_state &= ~PERF_ATTACH_CHILD;  in perf_child_detach()
2206 	sync_child_event(event);  in perf_child_detach()
2207 	list_del_init(&event->child_list);  in perf_child_detach()
2210 static bool is_orphaned_event(struct perf_event *event)  in is_orphaned_event()  argument
2212 	return event->state == PERF_EVENT_STATE_DEAD;  in is_orphaned_event()
2215 static inline int __pmu_filter_match(struct perf_event *event)  in __pmu_filter_match()  argument
2217 	struct pmu *pmu = event->pmu;  in __pmu_filter_match()
2218 	return pmu->filter_match ? pmu->filter_match(event) : 1;  in __pmu_filter_match()
2222  * Check whether we should attempt to schedule an event group based on
2223  * PMU-specific filtering. An event group can consist of HW and SW events,
2227 static inline int pmu_filter_match(struct perf_event *event)  in pmu_filter_match()  argument
2233 	if (!__pmu_filter_match(event))  in pmu_filter_match()
2237 	for_each_sibling_event(sibling, event) {  in pmu_filter_match()
2249 event_filter_match(struct perf_event *event)  in event_filter_match()  argument
2251 	return (event->cpu == -1 || event->cpu == smp_processor_id()) &&  in event_filter_match()
2252 	       perf_cgroup_match(event) && pmu_filter_match(event);  in event_filter_match()
2256 event_sched_out(struct perf_event *event,  in event_sched_out()  argument
2262 	WARN_ON_ONCE(event->ctx != ctx);  in event_sched_out()
2265 	if (event->state != PERF_EVENT_STATE_ACTIVE)  in event_sched_out()
2273 	list_del_init(&event->active_list);  in event_sched_out()
2275 	perf_pmu_disable(event->pmu);  in event_sched_out()
2277 	event->pmu->del(event, 0);  in event_sched_out()
2278 	event->oncpu = -1;  in event_sched_out()
2280 	if (event->pending_disable) {  in event_sched_out()
2281 		event->pending_disable = 0;  in event_sched_out()
2282 		perf_cgroup_event_disable(event, ctx);  in event_sched_out()
2286 	if (event->pending_sigtrap) {  in event_sched_out()
2289 		event->pending_sigtrap = 0;  in event_sched_out()
2291 		    !event->pending_work) {  in event_sched_out()
2292 			event->pending_work = 1;  in event_sched_out()
2294 			WARN_ON_ONCE(!atomic_long_inc_not_zero(&event->refcount));  in event_sched_out()
2295 			task_work_add(current, &event->pending_task, TWA_RESUME);  in event_sched_out()
2298 			local_dec(&event->ctx->nr_pending);  in event_sched_out()
2301 	perf_event_set_state(event, state);  in event_sched_out()
2303 	if (!is_software_event(event))  in event_sched_out()
2307 	if (event->attr.freq && event->attr.sample_freq)  in event_sched_out()
2309 	if (event->attr.exclusive || !cpuctx->active_oncpu)  in event_sched_out()
2312 	perf_pmu_enable(event->pmu);  in event_sched_out()
2320 	struct perf_event *event;  in group_sched_out()  local
2332 	for_each_sibling_event(event, group_event)  in group_sched_out()
2333 		event_sched_out(event, cpuctx, ctx);  in group_sched_out()
2343  * Cross CPU call to remove a performance event
2345  * We disable the event on the hardware level first. After that we
2349 __perf_remove_from_context(struct perf_event *event,  in __perf_remove_from_context()  argument
2366 		event->pending_disable = 1;  in __perf_remove_from_context()
2367 	event_sched_out(event, cpuctx, ctx);  in __perf_remove_from_context()
2369 		perf_group_detach(event);  in __perf_remove_from_context()
2371 		perf_child_detach(event);  in __perf_remove_from_context()
2372 	list_del_event(event, ctx);  in __perf_remove_from_context()
2374 		event->state = PERF_EVENT_STATE_DEAD;  in __perf_remove_from_context()
2390  * Remove the event from a task's (or a CPU's) list of events.
2392  * If event->ctx is a cloned context, callers must make sure that
2393  * every task struct that event->ctx->task could possibly point to
2399 static void perf_remove_from_context(struct perf_event *event, unsigned long flags)  in perf_remove_from_context()  argument
2401 	struct perf_event_context *ctx = event->ctx;  in perf_remove_from_context()
2415 	if (!ctx->is_active && !is_cgroup_event(event)) {  in perf_remove_from_context()
2416 		__perf_remove_from_context(event, __get_cpu_context(ctx),  in perf_remove_from_context()
2423 	event_function_call(event, __perf_remove_from_context, (void *)flags);  in perf_remove_from_context()
2427  * Cross CPU call to disable a performance event
2429 static void __perf_event_disable(struct perf_event *event,  in __perf_event_disable()  argument
2434 	if (event->state < PERF_EVENT_STATE_INACTIVE)  in __perf_event_disable()
2439 		update_cgrp_time_from_event(event);  in __perf_event_disable()
2442 	if (event == event->group_leader)  in __perf_event_disable()
2443 		group_sched_out(event, cpuctx, ctx);  in __perf_event_disable()
2445 		event_sched_out(event, cpuctx, ctx);  in __perf_event_disable()
2447 	perf_event_set_state(event, PERF_EVENT_STATE_OFF);  in __perf_event_disable()
2448 	perf_cgroup_event_disable(event, ctx);  in __perf_event_disable()
2452  * Disable an event.
2454  * If event->ctx is a cloned context, callers must make sure that
2455  * every task struct that event->ctx->task could possibly point to
2458  * hold the top-level event's child_mutex, so any descendant that
2461  * When called from perf_pending_irq it's OK because event->ctx
2465 static void _perf_event_disable(struct perf_event *event)  in _perf_event_disable()  argument
2467 	struct perf_event_context *ctx = event->ctx;  in _perf_event_disable()
2470 	if (event->state <= PERF_EVENT_STATE_OFF) {  in _perf_event_disable()
2476 	event_function_call(event, __perf_event_disable, NULL);  in _perf_event_disable()
2479 void perf_event_disable_local(struct perf_event *event)  in perf_event_disable_local()  argument
2481 	event_function_local(event, __perf_event_disable, NULL);  in perf_event_disable_local()
2488 void perf_event_disable(struct perf_event *event)  in perf_event_disable()  argument
2492 	ctx = perf_event_ctx_lock(event);  in perf_event_disable()
2493 	_perf_event_disable(event);  in perf_event_disable()
2494 	perf_event_ctx_unlock(event, ctx);  in perf_event_disable()
2498 void perf_event_disable_inatomic(struct perf_event *event)  in perf_event_disable_inatomic()  argument
2500 	event->pending_disable = 1;  in perf_event_disable_inatomic()
2501 	irq_work_queue(&event->pending_irq);  in perf_event_disable_inatomic()
2506 static void perf_log_throttle(struct perf_event *event, int enable);
2507 static void perf_log_itrace_start(struct perf_event *event);
2510 event_sched_in(struct perf_event *event,  in event_sched_in()  argument
2516 	WARN_ON_ONCE(event->ctx != ctx);  in event_sched_in()
2520 	if (event->state <= PERF_EVENT_STATE_OFF)  in event_sched_in()
2523 	WRITE_ONCE(event->oncpu, smp_processor_id());  in event_sched_in()
2525 	 * Order event::oncpu write to happen before the ACTIVE state is  in event_sched_in()
2530 	perf_event_set_state(event, PERF_EVENT_STATE_ACTIVE);  in event_sched_in()
2537 	if (unlikely(event->hw.interrupts == MAX_INTERRUPTS)) {  in event_sched_in()
2538 		perf_log_throttle(event, 1);  in event_sched_in()
2539 		event->hw.interrupts = 0;  in event_sched_in()
2542 	perf_pmu_disable(event->pmu);  in event_sched_in()
2544 	perf_log_itrace_start(event);  in event_sched_in()
2546 	if (event->pmu->add(event, PERF_EF_START)) {  in event_sched_in()
2547 		perf_event_set_state(event, PERF_EVENT_STATE_INACTIVE);  in event_sched_in()
2548 		event->oncpu = -1;  in event_sched_in()
2553 	if (!is_software_event(event))  in event_sched_in()
2557 	if (event->attr.freq && event->attr.sample_freq)  in event_sched_in()
2560 	if (event->attr.exclusive)  in event_sched_in()
2564 	perf_pmu_enable(event->pmu);  in event_sched_in()
2574 	struct perf_event *event, *partial_group = NULL;  in group_sched_in()  local
2588 	for_each_sibling_event(event, group_event) {  in group_sched_in()
2589 		if (event_sched_in(event, cpuctx, ctx)) {  in group_sched_in()
2590 			partial_group = event;  in group_sched_in()
2602 	 * The events up to the failed event are scheduled out normally.  in group_sched_in()
2604 	for_each_sibling_event(event, group_event) {  in group_sched_in()
2605 		if (event == partial_group)  in group_sched_in()
2608 		event_sched_out(event, cpuctx, ctx);  in group_sched_in()
2618  * Work out whether we can put this event group on the CPU now.
2620 static int group_can_go_on(struct perf_event *event,  in group_can_go_on()  argument
2627 	if (event->group_caps & PERF_EV_CAP_SOFTWARE)  in group_can_go_on()
2639 	if (event->attr.exclusive && !list_empty(get_event_list(event)))  in group_can_go_on()
2648 static void add_event_to_ctx(struct perf_event *event,  in add_event_to_ctx()  argument
2651 	list_add_event(event, ctx);  in add_event_to_ctx()
2652 	perf_group_attach(event);  in add_event_to_ctx()
2695  * time an event is added, only do it for the groups of equal priority and
2749  * Cross CPU call to install and enable a performance event
2756 	struct perf_event *event = info;  in __perf_install_in_context()  local
2757 	struct perf_event_context *ctx = event->ctx;  in __perf_install_in_context()
2788 	if (event->state > PERF_EVENT_STATE_OFF && is_cgroup_event(event)) {  in __perf_install_in_context()
2790 		 * If the current cgroup doesn't match the event's  in __perf_install_in_context()
2795 					event->cgrp->css.cgroup);  in __perf_install_in_context()
2801 		add_event_to_ctx(event, ctx);  in __perf_install_in_context()
2802 		ctx_resched(cpuctx, task_ctx, get_event_type(event));  in __perf_install_in_context()
2804 		add_event_to_ctx(event, ctx);  in __perf_install_in_context()
2813 static bool exclusive_event_installable(struct perf_event *event,
2817  * Attach a performance event to a context.
2823 			struct perf_event *event,  in perf_install_in_context()  argument
2830 	WARN_ON_ONCE(!exclusive_event_installable(event, ctx));  in perf_install_in_context()
2832 	if (event->cpu != -1)  in perf_install_in_context()
2833 		event->cpu = cpu;  in perf_install_in_context()
2836 	 * Ensures that if we can observe event->ctx, both the event and ctx  in perf_install_in_context()
2839 	smp_store_release(&event->ctx, ctx);  in perf_install_in_context()
2843 	 * without IPI. Except when this is the first event for the context, in  in perf_install_in_context()
2849 	 * event will issue the IPI and reprogram the hardware.  in perf_install_in_context()
2851 	if (__perf_effective_state(event) == PERF_EVENT_STATE_OFF &&  in perf_install_in_context()
2852 	    ctx->nr_events && !is_cgroup_event(event)) {  in perf_install_in_context()
2858 		add_event_to_ctx(event, ctx);  in perf_install_in_context()
2864 		cpu_function_call(cpu, __perf_install_in_context, event);  in perf_install_in_context()
2906 	if (!task_function_call(task, __perf_install_in_context, event))  in perf_install_in_context()
2922 	 * thus we can safely install the event.  in perf_install_in_context()
2928 	add_event_to_ctx(event, ctx);  in perf_install_in_context()
2933  * Cross CPU call to enable a performance event
2935 static void __perf_event_enable(struct perf_event *event,  in __perf_event_enable()  argument
2940 	struct perf_event *leader = event->group_leader;  in __perf_event_enable()
2943 	if (event->state >= PERF_EVENT_STATE_INACTIVE ||  in __perf_event_enable()
2944 	    event->state <= PERF_EVENT_STATE_ERROR)  in __perf_event_enable()
2950 	perf_event_set_state(event, PERF_EVENT_STATE_INACTIVE);  in __perf_event_enable()
2951 	perf_cgroup_event_enable(event, ctx);  in __perf_event_enable()
2956 	if (!event_filter_match(event)) {  in __perf_event_enable()
2962 	 * If the event is in a group and isn't the group leader,  in __perf_event_enable()
2965 	if (leader != event && leader->state != PERF_EVENT_STATE_ACTIVE) {  in __perf_event_enable()
2974 	ctx_resched(cpuctx, task_ctx, get_event_type(event));  in __perf_event_enable()
2978  * Enable an event.
2980  * If event->ctx is a cloned context, callers must make sure that
2981  * every task struct that event->ctx->task could possibly point to
2986 static void _perf_event_enable(struct perf_event *event)  in _perf_event_enable()  argument
2988 	struct perf_event_context *ctx = event->ctx;  in _perf_event_enable()
2991 	if (event->state >= PERF_EVENT_STATE_INACTIVE ||  in _perf_event_enable()
2992 	    event->state <  PERF_EVENT_STATE_ERROR) {  in _perf_event_enable()
2999 	 * If the event is in error state, clear that first.  in _perf_event_enable()
3001 	 * That way, if we see the event in error state below, we know that it  in _perf_event_enable()
3005 	if (event->state == PERF_EVENT_STATE_ERROR) {  in _perf_event_enable()
3009 		if (event->event_caps & PERF_EV_CAP_SIBLING &&  in _perf_event_enable()
3010 		    event->group_leader == event)  in _perf_event_enable()
3013 		event->state = PERF_EVENT_STATE_OFF;  in _perf_event_enable()
3017 	event_function_call(event, __perf_event_enable, NULL);  in _perf_event_enable()
3023 void perf_event_enable(struct perf_event *event)  in perf_event_enable()  argument
3027 	ctx = perf_event_ctx_lock(event);  in perf_event_enable()
3028 	_perf_event_enable(event);  in perf_event_enable()
3029 	perf_event_ctx_unlock(event, ctx);  in perf_event_enable()
3034 	struct perf_event	*event;  member
3041 	struct perf_event *event = sd->event;  in __perf_event_stop()  local
3044 	if (READ_ONCE(event->state) != PERF_EVENT_STATE_ACTIVE)  in __perf_event_stop()
3052 	 * so we need to check again lest we try to stop another CPU's event.  in __perf_event_stop()
3054 	if (READ_ONCE(event->oncpu) != smp_processor_id())  in __perf_event_stop()
3057 	event->pmu->stop(event, PERF_EF_UPDATE);  in __perf_event_stop()
3065 	 * Since this is happening on an event-local CPU, no trace is lost  in __perf_event_stop()
3069 		event->pmu->start(event, 0);  in __perf_event_stop()
3074 static int perf_event_stop(struct perf_event *event, int restart)  in perf_event_stop()  argument
3077 		.event		= event,  in perf_event_stop()
3083 		if (READ_ONCE(event->state) != PERF_EVENT_STATE_ACTIVE)  in perf_event_stop()
3090 		 * We only want to restart ACTIVE events, so if the event goes  in perf_event_stop()
3091 		 * inactive here (event->oncpu==-1), there's nothing more to do;  in perf_event_stop()
3094 		ret = cpu_function_call(READ_ONCE(event->oncpu),  in perf_event_stop()
3107  *	event::addr_filter_ranges array and bump the event::addr_filters_gen;
3108  * (p2) when an event is scheduled in (pmu::add), it calls
3112  * If (p1) happens while the event is active, we restart it to force (p2).
3123 void perf_event_addr_filters_sync(struct perf_event *event)  in perf_event_addr_filters_sync()  argument
3125 	struct perf_addr_filters_head *ifh = perf_event_addr_filters(event);  in perf_event_addr_filters_sync()
3127 	if (!has_addr_filter(event))  in perf_event_addr_filters_sync()
3131 	if (event->addr_filters_gen != event->hw.addr_filters_gen) {  in perf_event_addr_filters_sync()
3132 		event->pmu->addr_filters_sync(event);  in perf_event_addr_filters_sync()
3133 		event->hw.addr_filters_gen = event->addr_filters_gen;  in perf_event_addr_filters_sync()
3139 static int _perf_event_refresh(struct perf_event *event, int refresh)  in _perf_event_refresh()  argument
3144 	if (event->attr.inherit || !is_sampling_event(event))  in _perf_event_refresh()
3147 	atomic_add(refresh, &event->event_limit);  in _perf_event_refresh()
3148 	_perf_event_enable(event);  in _perf_event_refresh()
3156 int perf_event_refresh(struct perf_event *event, int refresh)  in perf_event_refresh()  argument
3161 	ctx = perf_event_ctx_lock(event);  in perf_event_refresh()
3162 	ret = _perf_event_refresh(event, refresh);  in perf_event_refresh()
3163 	perf_event_ctx_unlock(event, ctx);  in perf_event_refresh()
3185  * Copy event-type-independent attributes that may be modified.
3193 static int perf_event_modify_attr(struct perf_event *event,  in perf_event_modify_attr()  argument
3200 	if (event->attr.type != attr->type)  in perf_event_modify_attr()
3203 	switch (event->attr.type) {  in perf_event_modify_attr()
3212 	WARN_ON_ONCE(event->ctx->parent_ctx);  in perf_event_modify_attr()
3214 	mutex_lock(&event->child_mutex);  in perf_event_modify_attr()
3216 	 * Event-type-independent attributes must be copied before event-type  in perf_event_modify_attr()
3220 	perf_event_modify_copy_attr(&event->attr, attr);  in perf_event_modify_attr()
3221 	err = func(event, attr);  in perf_event_modify_attr()
3224 	list_for_each_entry(child, &event->child_list, child_list) {  in perf_event_modify_attr()
3231 	mutex_unlock(&event->child_mutex);  in perf_event_modify_attr()
3239 	struct perf_event *event, *tmp;  in ctx_sched_out()  local
3292 		list_for_each_entry_safe(event, tmp, &ctx->pinned_active, active_list)  in ctx_sched_out()
3293 			group_sched_out(event, cpuctx, ctx);  in ctx_sched_out()
3297 		list_for_each_entry_safe(event, tmp, &ctx->flexible_active, active_list)  in ctx_sched_out()
3298 			group_sched_out(event, cpuctx, ctx);  in ctx_sched_out()
3348 static void __perf_event_sync_stat(struct perf_event *event,  in __perf_event_sync_stat()  argument
3353 	if (!event->attr.inherit_stat)  in __perf_event_sync_stat()
3357 	 * Update the event value, we cannot use perf_event_read()  in __perf_event_sync_stat()
3360 	 * we know the event must be on the current CPU, therefore we  in __perf_event_sync_stat()
3363 	if (event->state == PERF_EVENT_STATE_ACTIVE)  in __perf_event_sync_stat()
3364 		event->pmu->read(event);  in __perf_event_sync_stat()
3366 	perf_event_update_time(event);  in __perf_event_sync_stat()
3369 	 * In order to keep per-task stats reliable we need to flip the event  in __perf_event_sync_stat()
3373 	value = local64_xchg(&event->count, value);  in __perf_event_sync_stat()
3376 	swap(event->total_time_enabled, next_event->total_time_enabled);  in __perf_event_sync_stat()
3377 	swap(event->total_time_running, next_event->total_time_running);  in __perf_event_sync_stat()
3382 	perf_event_update_userpage(event);  in __perf_event_sync_stat()
3389 	struct perf_event *event, *next_event;  in perf_event_sync_stat()  local
3396 	event = list_first_entry(&ctx->event_list,  in perf_event_sync_stat()
3402 	while (&event->event_entry != &ctx->event_list &&  in perf_event_sync_stat()
3405 		__perf_event_sync_stat(event, next_event);  in perf_event_sync_stat()
3407 		event = list_next_entry(event, event_entry);  in perf_event_sync_stat()
3550  * This callback is relevant even to per-cpu events; for example multi event
3600  * We stop each event and update the event value in event->count.
3603  * sets the disabled bit in the control field of event _before_
3604  * accessing the event control register. If a NMI hits, then it will
3605  * not restart the event.
3624 	 * cgroup event are system-wide mode only  in __perf_event_task_sched_out()
3660 static void __heap_add(struct min_heap *heap, struct perf_event *event)  in __heap_add()  argument
3664 	if (event) {  in __heap_add()
3665 		itrs[heap->nr] = event;  in __heap_add()
3678 	/* Space for per CPU and/or any CPU event iterators. */  in visit_groups_merge()
3733  * Because the userpage is strictly per-event (there is no concept of context,
3739 static inline bool event_update_userpage(struct perf_event *event)  in event_update_userpage()  argument
3741 	if (likely(!atomic_read(&event->mmap_count)))  in event_update_userpage()
3744 	perf_event_update_time(event);  in event_update_userpage()
3745 	perf_event_update_userpage(event);  in event_update_userpage()
3752 	struct perf_event *event;  in group_update_userpage()  local
3757 	for_each_sibling_event(event, group_event)  in group_update_userpage()
3758 		event_update_userpage(event);  in group_update_userpage()
3761 static int merge_sched_in(struct perf_event *event, void *data)  in merge_sched_in()  argument
3763 	struct perf_event_context *ctx = event->ctx;  in merge_sched_in()
3767 	if (event->state <= PERF_EVENT_STATE_OFF)  in merge_sched_in()
3770 	if (!event_filter_match(event))  in merge_sched_in()
3773 	if (group_can_go_on(event, cpuctx, *can_add_hw)) {  in merge_sched_in()
3774 		if (!group_sched_in(event, cpuctx, ctx))  in merge_sched_in()
3775 			list_add_tail(&event->active_list, get_event_list(event));  in merge_sched_in()
3778 	if (event->state == PERF_EVENT_STATE_INACTIVE) {  in merge_sched_in()
3780 		if (event->attr.pinned) {  in merge_sched_in()
3781 			perf_cgroup_event_disable(event, ctx);  in merge_sched_in()
3782 			perf_event_set_state(event, PERF_EVENT_STATE_ERROR);  in merge_sched_in()
3786 			group_update_userpage(event);  in merge_sched_in()
3928  * We restore the event value and then enable it.
3931  * sets the enabled bit in the control field of event _before_
3932  * accessing the event control register. If a NMI hits, then it will
3933  * keep the event running.
3956 static u64 perf_calculate_period(struct perf_event *event, u64 nsec, u64 count)  in perf_calculate_period()  argument
3958 	u64 frequency = event->attr.sample_freq;  in perf_calculate_period()
4032 static void perf_adjust_period(struct perf_event *event, u64 nsec, u64 count, bool disable)  in perf_adjust_period()  argument
4034 	struct hw_perf_event *hwc = &event->hw;  in perf_adjust_period()
4038 	period = perf_calculate_period(event, nsec, count);  in perf_adjust_period()
4052 			event->pmu->stop(event, PERF_EF_UPDATE);  in perf_adjust_period()
4057 			event->pmu->start(event, PERF_EF_RELOAD);  in perf_adjust_period()
4069 	struct perf_event *event;  in perf_adjust_freq_unthr_context()  local
4085 	list_for_each_entry_rcu(event, &ctx->event_list, event_entry) {  in perf_adjust_freq_unthr_context()
4086 		if (event->state != PERF_EVENT_STATE_ACTIVE)  in perf_adjust_freq_unthr_context()
4089 		if (!event_filter_match(event))  in perf_adjust_freq_unthr_context()
4092 		perf_pmu_disable(event->pmu);  in perf_adjust_freq_unthr_context()
4094 		hwc = &event->hw;  in perf_adjust_freq_unthr_context()
4098 			perf_log_throttle(event, 1);  in perf_adjust_freq_unthr_context()
4099 			event->pmu->start(event, 0);  in perf_adjust_freq_unthr_context()
4102 		if (!event->attr.freq || !event->attr.sample_freq)  in perf_adjust_freq_unthr_context()
4106 		 * stop the event and update event->count  in perf_adjust_freq_unthr_context()
4108 		event->pmu->stop(event, PERF_EF_UPDATE);  in perf_adjust_freq_unthr_context()
4110 		now = local64_read(&event->count);  in perf_adjust_freq_unthr_context()
4115 		 * restart the event  in perf_adjust_freq_unthr_context()
4117 		 * we have stopped the event so tell that  in perf_adjust_freq_unthr_context()
4122 			perf_adjust_period(event, period, delta, false);  in perf_adjust_freq_unthr_context()
4124 		event->pmu->start(event, delta > 0 ? PERF_EF_RELOAD : 0);  in perf_adjust_freq_unthr_context()
4126 		perf_pmu_enable(event->pmu);  in perf_adjust_freq_unthr_context()
4134  * Move @event to the tail of the @ctx's elegible events.
4136 static void rotate_ctx(struct perf_event_context *ctx, struct perf_event *event)  in rotate_ctx()  argument
4145 	perf_event_groups_delete(&ctx->flexible_groups, event);  in rotate_ctx()
4146 	perf_event_groups_insert(&ctx->flexible_groups, event);  in rotate_ctx()
4149 /* pick an event from the flexible_groups to rotate */
4153 	struct perf_event *event;  in ctx_event_to_rotate()  local
4155 	/* pick the first active flexible event */  in ctx_event_to_rotate()
4156 	event = list_first_entry_or_null(&ctx->flexible_active,  in ctx_event_to_rotate()
4159 	/* if no active flexible event, pick the first event */  in ctx_event_to_rotate()
4160 	if (!event) {  in ctx_event_to_rotate()
4161 		event = rb_entry_safe(rb_first(&ctx->flexible_groups.tree),  in ctx_event_to_rotate()
4162 				      typeof(*event), group_node);  in ctx_event_to_rotate()
4171 	return event;  in ctx_event_to_rotate()
4182 	 * events, thus the event count values are stable.  in perf_rotate_context()
4238 static int event_enable_on_exec(struct perf_event *event,  in event_enable_on_exec()  argument
4241 	if (!event->attr.enable_on_exec)  in event_enable_on_exec()
4244 	event->attr.enable_on_exec = 0;  in event_enable_on_exec()
4245 	if (event->state >= PERF_EVENT_STATE_INACTIVE)  in event_enable_on_exec()
4248 	perf_event_set_state(event, PERF_EVENT_STATE_INACTIVE);  in event_enable_on_exec()
4262 	struct perf_event *event;  in perf_event_enable_on_exec()  local
4274 	list_for_each_entry(event, &ctx->event_list, event_entry) {  in perf_event_enable_on_exec()
4275 		enabled |= event_enable_on_exec(event, ctx);  in perf_event_enable_on_exec()
4276 		event_type |= get_event_type(event);  in perf_event_enable_on_exec()
4280 	 * Unclone and reschedule this context if we enabled any event.  in perf_event_enable_on_exec()
4297 static void perf_remove_from_owner(struct perf_event *event);
4298 static void perf_event_exit_event(struct perf_event *event,
4308 	struct perf_event *event, *next;  in perf_event_remove_on_exec()  local
4321 	list_for_each_entry_safe(event, next, &ctx->event_list, event_entry) {  in perf_event_remove_on_exec()
4322 		if (!event->attr.remove_on_exec)  in perf_event_remove_on_exec()
4325 		if (!is_kernel_event(event))  in perf_event_remove_on_exec()
4326 			perf_remove_from_owner(event);  in perf_event_remove_on_exec()
4330 		perf_event_exit_event(event, ctx);  in perf_event_remove_on_exec()
4348 	struct perf_event *event;  member
4353 static int __perf_event_read_cpu(struct perf_event *event, int event_cpu)  in __perf_event_read_cpu()  argument
4357 	if (event->group_caps & PERF_EV_CAP_READ_ACTIVE_PKG) {  in __perf_event_read_cpu()
4371  * Cross CPU call to read the hardware event
4376 	struct perf_event *sub, *event = data->event;  in __perf_event_read()  local
4377 	struct perf_event_context *ctx = event->ctx;  in __perf_event_read()
4379 	struct pmu *pmu = event->pmu;  in __perf_event_read()
4385 	 * event->count would have been updated to a recent sample  in __perf_event_read()
4386 	 * when the event was scheduled out.  in __perf_event_read()
4394 		update_cgrp_time_from_event(event);  in __perf_event_read()
4397 	perf_event_update_time(event);  in __perf_event_read()
4399 		perf_event_update_sibling_time(event);  in __perf_event_read()
4401 	if (event->state != PERF_EVENT_STATE_ACTIVE)  in __perf_event_read()
4405 		pmu->read(event);  in __perf_event_read()
4412 	pmu->read(event);  in __perf_event_read()
4414 	for_each_sibling_event(sub, event) {  in __perf_event_read()
4417 			 * Use sibling's PMU rather than @event's since  in __perf_event_read()
4430 static inline u64 perf_event_count(struct perf_event *event)  in perf_event_count()  argument
4432 	return local64_read(&event->count) + atomic64_read(&event->child_count);  in perf_event_count()
4435 static void calc_timer_values(struct perf_event *event,  in calc_timer_values()  argument
4443 	ctx_time = perf_event_time_now(event, *now);  in calc_timer_values()
4444 	__perf_update_times(event, ctx_time, enabled, running);  in calc_timer_values()
4448  * NMI-safe method to read a local event, that is an event that
4455 int perf_event_read_local(struct perf_event *event, u64 *value,  in perf_event_read_local()  argument
4468 	 * It must not be an event with inherit set, we cannot read  in perf_event_read_local()
4471 	if (event->attr.inherit) {  in perf_event_read_local()
4476 	/* If this is a per-task event, it must be for current */  in perf_event_read_local()
4477 	if ((event->attach_state & PERF_ATTACH_TASK) &&  in perf_event_read_local()
4478 	    event->hw.target != current) {  in perf_event_read_local()
4483 	/* If this is a per-CPU event, it must be for this CPU */  in perf_event_read_local()
4484 	if (!(event->attach_state & PERF_ATTACH_TASK) &&  in perf_event_read_local()
4485 	    event->cpu != smp_processor_id()) {  in perf_event_read_local()
4490 	/* If this is a pinned event it must be running on this CPU */  in perf_event_read_local()
4491 	if (event->attr.pinned && event->oncpu != smp_processor_id()) {  in perf_event_read_local()
4497 	 * If the event is currently on this CPU, its either a per-task event,  in perf_event_read_local()
4501 	if (event->oncpu == smp_processor_id())  in perf_event_read_local()
4502 		event->pmu->read(event);  in perf_event_read_local()
4504 	*value = local64_read(&event->count);  in perf_event_read_local()
4508 		calc_timer_values(event, &__now, &__enabled, &__running);  in perf_event_read_local()
4520 static int perf_event_read(struct perf_event *event, bool group)  in perf_event_read()  argument
4522 	enum perf_event_state state = READ_ONCE(event->state);  in perf_event_read()
4526 	 * If event is enabled and currently active on a CPU, update the  in perf_event_read()
4527 	 * value in the event structure:  in perf_event_read()
4541 		event_cpu = READ_ONCE(event->oncpu);  in perf_event_read()
4546 			.event = event,  in perf_event_read()
4552 		event_cpu = __perf_event_read_cpu(event, event_cpu);  in perf_event_read()
4558 		 * If event_cpu isn't a valid CPU it means the event got  in perf_event_read()
4559 		 * scheduled out and that will have updated the event count.  in perf_event_read()
4561 		 * Therefore, either way, we'll have an up-to-date event count  in perf_event_read()
4569 		struct perf_event_context *ctx = event->ctx;  in perf_event_read()
4573 		state = event->state;  in perf_event_read()
4585 			update_cgrp_time_from_event(event);  in perf_event_read()
4588 		perf_event_update_time(event);  in perf_event_read()
4590 			perf_event_update_sibling_time(event);  in perf_event_read()
4655 		struct perf_event *event)  in find_get_context()  argument
4662 	int cpu = event->cpu;  in find_get_context()
4665 		/* Must be root to operate on a CPU event: */  in find_get_context()
4666 		err = perf_allow_cpu(&event->attr);  in find_get_context()
4685 	if (event->attach_state & PERF_ATTACH_TASK_DATA) {  in find_get_context()
4752 static void perf_event_free_filter(struct perf_event *event);
4756 	struct perf_event *event;  in free_event_rcu()  local
4758 	event = container_of(head, struct perf_event, rcu_head);  in free_event_rcu()
4759 	if (event->ns)  in free_event_rcu()
4760 		put_pid_ns(event->ns);  in free_event_rcu()
4761 	perf_event_free_filter(event);  in free_event_rcu()
4762 	kmem_cache_free(perf_event_cache, event);  in free_event_rcu()
4765 static void ring_buffer_attach(struct perf_event *event,
4768 static void detach_sb_event(struct perf_event *event)  in detach_sb_event()  argument
4770 	struct pmu_event_list *pel = per_cpu_ptr(&pmu_sb_events, event->cpu);  in detach_sb_event()
4773 	list_del_rcu(&event->sb_list);  in detach_sb_event()
4777 static bool is_sb_event(struct perf_event *event)  in is_sb_event()  argument
4779 	struct perf_event_attr *attr = &event->attr;  in is_sb_event()
4781 	if (event->parent)  in is_sb_event()
4784 	if (event->attach_state & PERF_ATTACH_TASK)  in is_sb_event()
4796 static void unaccount_pmu_sb_event(struct perf_event *event)  in unaccount_pmu_sb_event()  argument
4798 	if (is_sb_event(event))  in unaccount_pmu_sb_event()
4799 		detach_sb_event(event);  in unaccount_pmu_sb_event()
4802 static void unaccount_event_cpu(struct perf_event *event, int cpu)  in unaccount_event_cpu()  argument
4804 	if (event->parent)  in unaccount_event_cpu()
4807 	if (is_cgroup_event(event))  in unaccount_event_cpu()
4833 static void unaccount_event(struct perf_event *event)  in unaccount_event()  argument
4837 	if (event->parent)  in unaccount_event()
4840 	if (event->attach_state & (PERF_ATTACH_TASK | PERF_ATTACH_SCHED_CB))  in unaccount_event()
4842 	if (event->attr.mmap || event->attr.mmap_data)  in unaccount_event()
4844 	if (event->attr.build_id)  in unaccount_event()
4846 	if (event->attr.comm)  in unaccount_event()
4848 	if (event->attr.namespaces)  in unaccount_event()
4850 	if (event->attr.cgroup)  in unaccount_event()
4852 	if (event->attr.task)  in unaccount_event()
4854 	if (event->attr.freq)  in unaccount_event()
4856 	if (event->attr.context_switch) {  in unaccount_event()
4860 	if (is_cgroup_event(event))  in unaccount_event()
4862 	if (has_branch_stack(event))  in unaccount_event()
4864 	if (event->attr.ksymbol)  in unaccount_event()
4866 	if (event->attr.bpf_event)  in unaccount_event()
4868 	if (event->attr.text_poke)  in unaccount_event()
4876 	unaccount_event_cpu(event, event->cpu);  in unaccount_event()
4878 	unaccount_pmu_sb_event(event);  in unaccount_event()
4891  * (PERF_PMU_CAP_EXCLUSIVE). Such pmus can only have one event scheduled
4901 static int exclusive_event_init(struct perf_event *event)  in exclusive_event_init()  argument
4903 	struct pmu *pmu = event->pmu;  in exclusive_event_init()
4916 	 * Since this is called in perf_event_alloc() path, event::ctx  in exclusive_event_init()
4918 	 * to mean "per-task event", because unlike other attach states it  in exclusive_event_init()
4921 	if (event->attach_state & PERF_ATTACH_TASK) {  in exclusive_event_init()
4932 static void exclusive_event_destroy(struct perf_event *event)  in exclusive_event_destroy()  argument
4934 	struct pmu *pmu = event->pmu;  in exclusive_event_destroy()
4940 	if (event->attach_state & PERF_ATTACH_TASK)  in exclusive_event_destroy()
4956 static bool exclusive_event_installable(struct perf_event *event,  in exclusive_event_installable()  argument
4960 	struct pmu *pmu = event->pmu;  in exclusive_event_installable()
4968 		if (exclusive_event_match(iter_event, event))  in exclusive_event_installable()
4975 static void perf_addr_filters_splice(struct perf_event *event,
4978 static void _free_event(struct perf_event *event)  in _free_event()  argument
4980 	irq_work_sync(&event->pending_irq);  in _free_event()
4982 	unaccount_event(event);  in _free_event()
4984 	security_perf_event_free(event);  in _free_event()
4986 	if (event->rb) {  in _free_event()
4988 		 * Can happen when we close an event with re-directed output.  in _free_event()
4993 		mutex_lock(&event->mmap_mutex);  in _free_event()
4994 		ring_buffer_attach(event, NULL);  in _free_event()
4995 		mutex_unlock(&event->mmap_mutex);  in _free_event()
4998 	if (is_cgroup_event(event))  in _free_event()
4999 		perf_detach_cgroup(event);  in _free_event()
5001 	if (!event->parent) {  in _free_event()
5002 		if (event->attr.sample_type & PERF_SAMPLE_CALLCHAIN)  in _free_event()
5006 	perf_event_free_bpf_prog(event);  in _free_event()
5007 	perf_addr_filters_splice(event, NULL);  in _free_event()
5008 	kfree(event->addr_filter_ranges);  in _free_event()
5010 	if (event->destroy)  in _free_event()
5011 		event->destroy(event);  in _free_event()
5017 	if (event->hw.target)  in _free_event()
5018 		put_task_struct(event->hw.target);  in _free_event()
5024 	if (event->ctx)  in _free_event()
5025 		put_ctx(event->ctx);  in _free_event()
5027 	exclusive_event_destroy(event);  in _free_event()
5028 	module_put(event->pmu->module);  in _free_event()
5030 	call_rcu(&event->rcu_head, free_event_rcu);  in _free_event()
5035  * where the event isn't exposed yet and inherited events.
5037 static void free_event(struct perf_event *event)  in free_event()  argument
5039 	if (WARN(atomic_long_cmpxchg(&event->refcount, 1, 0) != 1,  in free_event()
5040 				"unexpected event refcount: %ld; ptr=%p\n",  in free_event()
5041 				atomic_long_read(&event->refcount), event)) {  in free_event()
5046 	_free_event(event);  in free_event()
5050  * Remove user event from the owner task.
5052 static void perf_remove_from_owner(struct perf_event *event)  in perf_remove_from_owner()  argument
5060 	 * indeed free this event, otherwise we need to serialize on  in perf_remove_from_owner()
5063 	owner = READ_ONCE(event->owner);  in perf_remove_from_owner()
5086 		 * We have to re-check the event->owner field, if it is cleared  in perf_remove_from_owner()
5089 		 * event.  in perf_remove_from_owner()
5091 		if (event->owner) {  in perf_remove_from_owner()
5092 			list_del_init(&event->owner_entry);  in perf_remove_from_owner()
5093 			smp_store_release(&event->owner, NULL);  in perf_remove_from_owner()
5100 static void put_event(struct perf_event *event)  in put_event()  argument
5102 	if (!atomic_long_dec_and_test(&event->refcount))  in put_event()
5105 	_free_event(event);  in put_event()
5109  * Kill an event dead; while event:refcount will preserve the event
5113 int perf_event_release_kernel(struct perf_event *event)  in perf_event_release_kernel()  argument
5115 	struct perf_event_context *ctx = event->ctx;  in perf_event_release_kernel()
5124 		WARN_ON_ONCE(event->attach_state &  in perf_event_release_kernel()
5129 	if (!is_kernel_event(event))  in perf_event_release_kernel()
5130 		perf_remove_from_owner(event);  in perf_event_release_kernel()
5132 	ctx = perf_event_ctx_lock(event);  in perf_event_release_kernel()
5136 	 * Mark this event as STATE_DEAD, there is no external reference to it  in perf_event_release_kernel()
5139 	 * Anybody acquiring event->child_mutex after the below loop _must_  in perf_event_release_kernel()
5146 	perf_remove_from_context(event, DETACH_GROUP|DETACH_DEAD);  in perf_event_release_kernel()
5148 	perf_event_ctx_unlock(event, ctx);  in perf_event_release_kernel()
5151 	mutex_lock(&event->child_mutex);  in perf_event_release_kernel()
5152 	list_for_each_entry(child, &event->child_list, child_list) {  in perf_event_release_kernel()
5163 		 * Since the event cannot get freed while we hold the  in perf_event_release_kernel()
5174 		mutex_unlock(&event->child_mutex);  in perf_event_release_kernel()
5176 		mutex_lock(&event->child_mutex);  in perf_event_release_kernel()
5183 		tmp = list_first_entry_or_null(&event->child_list,  in perf_event_release_kernel()
5192 			put_event(event);  in perf_event_release_kernel()
5195 		mutex_unlock(&event->child_mutex);  in perf_event_release_kernel()
5200 	mutex_unlock(&event->child_mutex);  in perf_event_release_kernel()
5209 		 * Wake any perf_event_free_task() waiting for this event to be  in perf_event_release_kernel()
5217 	put_event(event); /* Must be the 'last' reference */  in perf_event_release_kernel()
5231 static u64 __perf_event_read_value(struct perf_event *event, u64 *enabled, u64 *running)  in __perf_event_read_value()  argument
5239 	mutex_lock(&event->child_mutex);  in __perf_event_read_value()
5241 	(void)perf_event_read(event, false);  in __perf_event_read_value()
5242 	total += perf_event_count(event);  in __perf_event_read_value()
5244 	*enabled += event->total_time_enabled +  in __perf_event_read_value()
5245 			atomic64_read(&event->child_total_time_enabled);  in __perf_event_read_value()
5246 	*running += event->total_time_running +  in __perf_event_read_value()
5247 			atomic64_read(&event->child_total_time_running);  in __perf_event_read_value()
5249 	list_for_each_entry(child, &event->child_list, child_list) {  in __perf_event_read_value()
5255 	mutex_unlock(&event->child_mutex);  in __perf_event_read_value()
5260 u64 perf_event_read_value(struct perf_event *event, u64 *enabled, u64 *running)  in perf_event_read_value()  argument
5265 	ctx = perf_event_ctx_lock(event);  in perf_event_read_value()
5266 	count = __perf_event_read_value(event, enabled, running);  in perf_event_read_value()
5267 	perf_event_ctx_unlock(event, ctx);  in perf_event_read_value()
5324 static int perf_read_group(struct perf_event *event,  in perf_read_group()  argument
5327 	struct perf_event *leader = event->group_leader, *child;  in perf_read_group()
5334 	values = kzalloc(event->read_size, GFP_KERNEL);  in perf_read_group()
5358 	ret = event->read_size;  in perf_read_group()
5359 	if (copy_to_user(buf, values, event->read_size))  in perf_read_group()
5370 static int perf_read_one(struct perf_event *event,  in perf_read_one()  argument
5377 	values[n++] = __perf_event_read_value(event, &enabled, &running);  in perf_read_one()
5383 		values[n++] = primary_event_id(event);  in perf_read_one()
5385 		values[n++] = atomic64_read(&event->lost_samples);  in perf_read_one()
5393 static bool is_event_hup(struct perf_event *event)  in is_event_hup()  argument
5397 	if (event->state > PERF_EVENT_STATE_EXIT)  in is_event_hup()
5400 	mutex_lock(&event->child_mutex);  in is_event_hup()
5401 	no_children = list_empty(&event->child_list);  in is_event_hup()
5402 	mutex_unlock(&event->child_mutex);  in is_event_hup()
5407  * Read the performance event - simple non blocking version for now
5410 __perf_read(struct perf_event *event, char __user *buf, size_t count)  in __perf_read()  argument
5412 	u64 read_format = event->attr.read_format;  in __perf_read()
5416 	 * Return end-of-file for a read on an event that is in  in __perf_read()
5420 	if (event->state == PERF_EVENT_STATE_ERROR)  in __perf_read()
5423 	if (count < event->read_size)  in __perf_read()
5426 	WARN_ON_ONCE(event->ctx->parent_ctx);  in __perf_read()
5428 		ret = perf_read_group(event, read_format, buf);  in __perf_read()
5430 		ret = perf_read_one(event, read_format, buf);  in __perf_read()
5438 	struct perf_event *event = file->private_data;  in perf_read()  local
5442 	ret = security_perf_event_read(event);  in perf_read()
5446 	ctx = perf_event_ctx_lock(event);  in perf_read()
5447 	ret = __perf_read(event, buf, count);  in perf_read()
5448 	perf_event_ctx_unlock(event, ctx);  in perf_read()
5455 	struct perf_event *event = file->private_data;  in perf_poll()  local
5459 	poll_wait(file, &event->waitq, wait);  in perf_poll()
5461 	if (is_event_hup(event))  in perf_poll()
5465 	 * Pin the event->rb by taking event->mmap_mutex; otherwise  in perf_poll()
5468 	mutex_lock(&event->mmap_mutex);  in perf_poll()
5469 	rb = event->rb;  in perf_poll()
5472 	mutex_unlock(&event->mmap_mutex);  in perf_poll()
5476 static void _perf_event_reset(struct perf_event *event)  in _perf_event_reset()  argument
5478 	(void)perf_event_read(event, false);  in _perf_event_reset()
5479 	local64_set(&event->count, 0);  in _perf_event_reset()
5480 	perf_event_update_userpage(event);  in _perf_event_reset()
5483 /* Assume it's not an event with inherit set. */
5484 u64 perf_event_pause(struct perf_event *event, bool reset)  in perf_event_pause()  argument
5489 	ctx = perf_event_ctx_lock(event);  in perf_event_pause()
5490 	WARN_ON_ONCE(event->attr.inherit);  in perf_event_pause()
5491 	_perf_event_disable(event);  in perf_event_pause()
5492 	count = local64_read(&event->count);  in perf_event_pause()
5494 		local64_set(&event->count, 0);  in perf_event_pause()
5495 	perf_event_ctx_unlock(event, ctx);  in perf_event_pause()
5502  * Holding the top-level event's child_mutex means that any
5503  * descendant process that has inherited this event will block
5507 static void perf_event_for_each_child(struct perf_event *event,  in perf_event_for_each_child()  argument
5512 	WARN_ON_ONCE(event->ctx->parent_ctx);  in perf_event_for_each_child()
5514 	mutex_lock(&event->child_mutex);  in perf_event_for_each_child()
5515 	func(event);  in perf_event_for_each_child()
5516 	list_for_each_entry(child, &event->child_list, child_list)  in perf_event_for_each_child()
5518 	mutex_unlock(&event->child_mutex);  in perf_event_for_each_child()
5521 static void perf_event_for_each(struct perf_event *event,  in perf_event_for_each()  argument
5524 	struct perf_event_context *ctx = event->ctx;  in perf_event_for_each()
5529 	event = event->group_leader;  in perf_event_for_each()
5531 	perf_event_for_each_child(event, func);  in perf_event_for_each()
5532 	for_each_sibling_event(sibling, event)  in perf_event_for_each()
5536 static void __perf_event_period(struct perf_event *event,  in __perf_event_period()  argument
5544 	if (event->attr.freq) {  in __perf_event_period()
5545 		event->attr.sample_freq = value;  in __perf_event_period()
5547 		event->attr.sample_period = value;  in __perf_event_period()
5548 		event->hw.sample_period = value;  in __perf_event_period()
5551 	active = (event->state == PERF_EVENT_STATE_ACTIVE);  in __perf_event_period()
5556 		 * trying to unthrottle while we already re-started the event.  in __perf_event_period()
5558 		if (event->hw.interrupts == MAX_INTERRUPTS) {  in __perf_event_period()
5559 			event->hw.interrupts = 0;  in __perf_event_period()
5560 			perf_log_throttle(event, 1);  in __perf_event_period()
5562 		event->pmu->stop(event, PERF_EF_UPDATE);  in __perf_event_period()
5565 	local64_set(&event->hw.period_left, 0);  in __perf_event_period()
5568 		event->pmu->start(event, PERF_EF_RELOAD);  in __perf_event_period()
5573 static int perf_event_check_period(struct perf_event *event, u64 value)  in perf_event_check_period()  argument
5575 	return event->pmu->check_period(event, value);  in perf_event_check_period()
5578 static int _perf_event_period(struct perf_event *event, u64 value)  in _perf_event_period()  argument
5580 	if (!is_sampling_event(event))  in _perf_event_period()
5586 	if (event->attr.freq && value > sysctl_perf_event_sample_rate)  in _perf_event_period()
5589 	if (perf_event_check_period(event, value))  in _perf_event_period()
5592 	if (!event->attr.freq && (value & (1ULL << 63)))  in _perf_event_period()
5595 	event_function_call(event, __perf_event_period, &value);  in _perf_event_period()
5600 int perf_event_period(struct perf_event *event, u64 value)  in perf_event_period()  argument
5605 	ctx = perf_event_ctx_lock(event);  in perf_event_period()
5606 	ret = _perf_event_period(event, value);  in perf_event_period()
5607 	perf_event_ctx_unlock(event, ctx);  in perf_event_period()
5629 static int perf_event_set_output(struct perf_event *event,
5631 static int perf_event_set_filter(struct perf_event *event, void __user *arg);
5635 static long _perf_ioctl(struct perf_event *event, unsigned int cmd, unsigned long arg)  in _perf_ioctl()  argument
5652 		return _perf_event_refresh(event, arg);  in _perf_ioctl()
5661 		return _perf_event_period(event, value);  in _perf_ioctl()
5665 		u64 id = primary_event_id(event);  in _perf_ioctl()
5682 			ret = perf_event_set_output(event, output_event);  in _perf_ioctl()
5685 			ret = perf_event_set_output(event, NULL);  in _perf_ioctl()
5691 		return perf_event_set_filter(event, (void __user *)arg);  in _perf_ioctl()
5702 		err = perf_event_set_bpf_prog(event, prog, 0);  in _perf_ioctl()
5715 		rb = rcu_dereference(event->rb);  in _perf_ioctl()
5726 		return perf_event_query_prog_array(event, (void __user *)arg);  in _perf_ioctl()
5736 		return perf_event_modify_attr(event,  &new_attr);  in _perf_ioctl()
5743 		perf_event_for_each(event, func);  in _perf_ioctl()
5745 		perf_event_for_each_child(event, func);  in _perf_ioctl()
5752 	struct perf_event *event = file->private_data;  in perf_ioctl()  local
5757 	ret = security_perf_event_write(event);  in perf_ioctl()
5761 	ctx = perf_event_ctx_lock(event);  in perf_ioctl()
5762 	ret = _perf_ioctl(event, cmd, arg);  in perf_ioctl()
5763 	perf_event_ctx_unlock(event, ctx);  in perf_ioctl()
5793 	struct perf_event *event;  in perf_event_task_enable()  local
5796 	list_for_each_entry(event, &current->perf_event_list, owner_entry) {  in perf_event_task_enable()
5797 		ctx = perf_event_ctx_lock(event);  in perf_event_task_enable()
5798 		perf_event_for_each_child(event, _perf_event_enable);  in perf_event_task_enable()
5799 		perf_event_ctx_unlock(event, ctx);  in perf_event_task_enable()
5809 	struct perf_event *event;  in perf_event_task_disable()  local
5812 	list_for_each_entry(event, &current->perf_event_list, owner_entry) {  in perf_event_task_disable()
5813 		ctx = perf_event_ctx_lock(event);  in perf_event_task_disable()
5814 		perf_event_for_each_child(event, _perf_event_disable);  in perf_event_task_disable()
5815 		perf_event_ctx_unlock(event, ctx);  in perf_event_task_disable()
5822 static int perf_event_index(struct perf_event *event)  in perf_event_index()  argument
5824 	if (event->hw.state & PERF_HES_STOPPED)  in perf_event_index()
5827 	if (event->state != PERF_EVENT_STATE_ACTIVE)  in perf_event_index()
5830 	return event->pmu->event_idx(event);  in perf_event_index()
5833 static void perf_event_init_userpage(struct perf_event *event)  in perf_event_init_userpage()  argument
5839 	rb = rcu_dereference(event->rb);  in perf_event_init_userpage()
5856 	struct perf_event *event, struct perf_event_mmap_page *userpg, u64 now)  in arch_perf_update_userpage()  argument
5865 void perf_event_update_userpage(struct perf_event *event)  in perf_event_update_userpage()  argument
5872 	rb = rcu_dereference(event->rb);  in perf_event_update_userpage()
5878 	 * based on snapshot values taken when the event  in perf_event_update_userpage()
5885 	calc_timer_values(event, &now, &enabled, &running);  in perf_event_update_userpage()
5895 	userpg->index = perf_event_index(event);  in perf_event_update_userpage()
5896 	userpg->offset = perf_event_count(event);  in perf_event_update_userpage()
5898 		userpg->offset -= local64_read(&event->hw.prev_count);  in perf_event_update_userpage()
5901 			atomic64_read(&event->child_total_time_enabled);  in perf_event_update_userpage()
5904 			atomic64_read(&event->child_total_time_running);  in perf_event_update_userpage()
5906 	arch_perf_update_userpage(event, userpg, now);  in perf_event_update_userpage()
5918 	struct perf_event *event = vmf->vma->vm_file->private_data;  in perf_mmap_fault()  local
5929 	rb = rcu_dereference(event->rb);  in perf_mmap_fault()
5951 static void ring_buffer_attach(struct perf_event *event,  in ring_buffer_attach()  argument
5957 	WARN_ON_ONCE(event->parent);  in ring_buffer_attach()
5959 	if (event->rb) {  in ring_buffer_attach()
5962 		 * event->rb_entry and wait/clear when adding event->rb_entry.  in ring_buffer_attach()
5964 		WARN_ON_ONCE(event->rcu_pending);  in ring_buffer_attach()
5966 		old_rb = event->rb;  in ring_buffer_attach()
5968 		list_del_rcu(&event->rb_entry);  in ring_buffer_attach()
5971 		event->rcu_batches = get_state_synchronize_rcu();  in ring_buffer_attach()
5972 		event->rcu_pending = 1;  in ring_buffer_attach()
5976 		if (event->rcu_pending) {  in ring_buffer_attach()
5977 			cond_synchronize_rcu(event->rcu_batches);  in ring_buffer_attach()
5978 			event->rcu_pending = 0;  in ring_buffer_attach()
5982 		list_add_rcu(&event->rb_entry, &rb->event_list);  in ring_buffer_attach()
5987 	 * Avoid racing with perf_mmap_close(AUX): stop the event  in ring_buffer_attach()
5988 	 * before swizzling the event::rb pointer; if it's getting  in ring_buffer_attach()
5996 	if (has_aux(event))  in ring_buffer_attach()
5997 		perf_event_stop(event, 0);  in ring_buffer_attach()
5999 	rcu_assign_pointer(event->rb, rb);  in ring_buffer_attach()
6008 		wake_up_all(&event->waitq);  in ring_buffer_attach()
6012 static void ring_buffer_wakeup(struct perf_event *event)  in ring_buffer_wakeup()  argument
6016 	if (event->parent)  in ring_buffer_wakeup()
6017 		event = event->parent;  in ring_buffer_wakeup()
6020 	rb = rcu_dereference(event->rb);  in ring_buffer_wakeup()
6022 		list_for_each_entry_rcu(event, &rb->event_list, rb_entry)  in ring_buffer_wakeup()
6023 			wake_up_all(&event->waitq);  in ring_buffer_wakeup()
6028 struct perf_buffer *ring_buffer_get(struct perf_event *event)  in ring_buffer_get()  argument
6032 	if (event->parent)  in ring_buffer_get()
6033 		event = event->parent;  in ring_buffer_get()
6036 	rb = rcu_dereference(event->rb);  in ring_buffer_get()
6058 	struct perf_event *event = vma->vm_file->private_data;  in perf_mmap_open()  local
6060 	atomic_inc(&event->mmap_count);  in perf_mmap_open()
6061 	atomic_inc(&event->rb->mmap_count);  in perf_mmap_open()
6064 		atomic_inc(&event->rb->aux_mmap_count);  in perf_mmap_open()
6066 	if (event->pmu->event_mapped)  in perf_mmap_open()
6067 		event->pmu->event_mapped(event, vma->vm_mm);  in perf_mmap_open()
6070 static void perf_pmu_output_stop(struct perf_event *event);
6074  * event, or through other events by use of perf_event_set_output().
6082 	struct perf_event *event = vma->vm_file->private_data;  in perf_mmap_close()  local
6083 	struct perf_buffer *rb = ring_buffer_get(event);  in perf_mmap_close()
6089 	if (event->pmu->event_unmapped)  in perf_mmap_close()
6090 		event->pmu->event_unmapped(event, vma->vm_mm);  in perf_mmap_close()
6094 	 * event->mmap_count, so it is ok to use event->mmap_mutex to  in perf_mmap_close()
6098 	    atomic_dec_and_mutex_lock(&rb->aux_mmap_count, &event->mmap_mutex)) {  in perf_mmap_close()
6105 		perf_pmu_output_stop(event);  in perf_mmap_close()
6115 		mutex_unlock(&event->mmap_mutex);  in perf_mmap_close()
6121 	if (!atomic_dec_and_mutex_lock(&event->mmap_count, &event->mmap_mutex))  in perf_mmap_close()
6124 	ring_buffer_attach(event, NULL);  in perf_mmap_close()
6125 	mutex_unlock(&event->mmap_mutex);  in perf_mmap_close()
6138 	list_for_each_entry_rcu(event, &rb->event_list, rb_entry) {  in perf_mmap_close()
6139 		if (!atomic_long_inc_not_zero(&event->refcount)) {  in perf_mmap_close()
6141 			 * This event is en-route to free_event() which will  in perf_mmap_close()
6148 		mutex_lock(&event->mmap_mutex);  in perf_mmap_close()
6154 		 * If we find a different rb; ignore this event, a next  in perf_mmap_close()
6159 		if (event->rb == rb)  in perf_mmap_close()
6160 			ring_buffer_attach(event, NULL);  in perf_mmap_close()
6162 		mutex_unlock(&event->mmap_mutex);  in perf_mmap_close()
6163 		put_event(event);  in perf_mmap_close()
6200 	struct perf_event *event = file->private_data;  in perf_mmap()  local
6215 	if (event->cpu == -1 && event->attr.inherit)  in perf_mmap()
6221 	ret = security_perf_event_read(event);  in perf_mmap()
6237 		if (!event->rb)  in perf_mmap()
6242 		mutex_lock(&event->mmap_mutex);  in perf_mmap()
6245 		rb = event->rb;  in perf_mmap()
6297 	WARN_ON_ONCE(event->ctx->parent_ctx);  in perf_mmap()
6299 	mutex_lock(&event->mmap_mutex);  in perf_mmap()
6300 	if (event->rb) {  in perf_mmap()
6301 		if (data_page_nr(event->rb) != nr_pages) {  in perf_mmap()
6306 		if (!atomic_inc_not_zero(&event->rb->mmap_count)) {  in perf_mmap()
6309 			 * event and try again.  in perf_mmap()
6311 			ring_buffer_attach(event, NULL);  in perf_mmap()
6312 			mutex_unlock(&event->mmap_mutex);  in perf_mmap()
6358 	WARN_ON(!rb && event->rb);  in perf_mmap()
6365 			      event->attr.watermark ? event->attr.wakeup_watermark : 0,  in perf_mmap()
6366 			      event->cpu, flags);  in perf_mmap()
6377 		ring_buffer_attach(event, rb);  in perf_mmap()
6379 		perf_event_update_time(event);  in perf_mmap()
6380 		perf_event_init_userpage(event);  in perf_mmap()
6381 		perf_event_update_userpage(event);  in perf_mmap()
6383 		ret = rb_alloc_aux(rb, event, vma->vm_pgoff, nr_pages,  in perf_mmap()
6384 				   event->attr.aux_watermark, flags);  in perf_mmap()
6394 		atomic_inc(&event->mmap_count);  in perf_mmap()
6399 	mutex_unlock(&event->mmap_mutex);  in perf_mmap()
6408 	if (event->pmu->event_mapped)  in perf_mmap()
6409 		event->pmu->event_mapped(event, vma->vm_mm);  in perf_mmap()
6417 	struct perf_event *event = filp->private_data;  in perf_fasync()  local
6421 	retval = fasync_helper(fd, filp, on, &event->fasync);  in perf_fasync()
6442  * Perf event wakeup
6448 static inline struct fasync_struct **perf_event_fasync(struct perf_event *event)  in perf_event_fasync()  argument
6451 	if (event->parent)  in perf_event_fasync()
6452 		event = event->parent;  in perf_event_fasync()
6453 	return &event->fasync;  in perf_event_fasync()
6456 void perf_event_wakeup(struct perf_event *event)  in perf_event_wakeup()  argument
6458 	ring_buffer_wakeup(event);  in perf_event_wakeup()
6460 	if (event->pending_kill) {  in perf_event_wakeup()
6461 		kill_fasync(perf_event_fasync(event), SIGIO, event->pending_kill);  in perf_event_wakeup()
6462 		event->pending_kill = 0;  in perf_event_wakeup()
6466 static void perf_sigtrap(struct perf_event *event)  in perf_sigtrap()  argument
6473 	if (WARN_ON_ONCE(event->ctx->task != current))  in perf_sigtrap()
6483 	send_sig_perf((void __user *)event->pending_addr,  in perf_sigtrap()
6484 		      event->attr.type, event->attr.sig_data);  in perf_sigtrap()
6488  * Deliver the pending work in-event-context or follow the context.
6490 static void __perf_pending_irq(struct perf_event *event)  in __perf_pending_irq()  argument
6492 	int cpu = READ_ONCE(event->oncpu);  in __perf_pending_irq()
6495 	 * If the event isn't running; we done. event_sched_out() will have  in __perf_pending_irq()
6502 	 * Yay, we hit home and are in the context of the event.  in __perf_pending_irq()
6505 		if (event->pending_sigtrap) {  in __perf_pending_irq()
6506 			event->pending_sigtrap = 0;  in __perf_pending_irq()
6507 			perf_sigtrap(event);  in __perf_pending_irq()
6508 			local_dec(&event->ctx->nr_pending);  in __perf_pending_irq()
6510 		if (event->pending_disable) {  in __perf_pending_irq()
6511 			event->pending_disable = 0;  in __perf_pending_irq()
6512 			perf_event_disable_local(event);  in __perf_pending_irq()
6535 	 * But the event runs on CPU-B and wants disabling there.  in __perf_pending_irq()
6537 	irq_work_queue_on(&event->pending_irq, cpu);  in __perf_pending_irq()
6542 	struct perf_event *event = container_of(entry, struct perf_event, pending_irq);  in perf_pending_irq()  local
6552 	 * The wakeup isn't bound to the context of the event -- it can happen  in perf_pending_irq()
6553 	 * irrespective of where the event is.  in perf_pending_irq()
6555 	if (event->pending_wakeup) {  in perf_pending_irq()
6556 		event->pending_wakeup = 0;  in perf_pending_irq()
6557 		perf_event_wakeup(event);  in perf_pending_irq()
6560 	__perf_pending_irq(event);  in perf_pending_irq()
6568 	struct perf_event *event = container_of(head, struct perf_event, pending_task);  in perf_pending_task()  local
6578 	if (event->pending_work) {  in perf_pending_task()
6579 		event->pending_work = 0;  in perf_pending_task()
6580 		perf_sigtrap(event);  in perf_pending_task()
6581 		local_dec(&event->ctx->nr_pending);  in perf_pending_task()
6588 	put_event(event);  in perf_pending_task()
6762 static unsigned long perf_prepare_sample_aux(struct perf_event *event,  in perf_prepare_sample_aux()  argument
6766 	struct perf_event *sampler = event->aux_event;  in perf_prepare_sample_aux()
6801                                  struct perf_event *event,  in perf_pmu_snapshot_aux()  argument
6811 	 * the IRQ ones, that is, for example, re-starting an event that's just  in perf_pmu_snapshot_aux()
6813 	 * doesn't change the event state.  in perf_pmu_snapshot_aux()
6825 	ret = event->pmu->snapshot_aux(event, handle, size);  in perf_pmu_snapshot_aux()
6834 static void perf_aux_sample_output(struct perf_event *event,  in perf_aux_sample_output()  argument
6838 	struct perf_event *sampler = event->aux_event;  in perf_aux_sample_output()
6880 					 struct perf_event *event,  in __perf_event_header__init_id()  argument
6883 	data->type = event->attr.sample_type;  in __perf_event_header__init_id()
6884 	header->size += event->id_header_size;  in __perf_event_header__init_id()
6888 		data->tid_entry.pid = perf_event_pid(event, current);  in __perf_event_header__init_id()
6889 		data->tid_entry.tid = perf_event_tid(event, current);  in __perf_event_header__init_id()
6893 		data->time = perf_event_clock(event);  in __perf_event_header__init_id()
6896 		data->id = primary_event_id(event);  in __perf_event_header__init_id()
6899 		data->stream_id = event->id;  in __perf_event_header__init_id()
6909 				struct perf_event *event)  in perf_event_header__init_id()  argument
6911 	if (event->attr.sample_id_all)  in perf_event_header__init_id()
6912 		__perf_event_header__init_id(header, data, event, event->attr.sample_type);  in perf_event_header__init_id()
6939 void perf_event__output_id_sample(struct perf_event *event,  in perf_event__output_id_sample()  argument
6943 	if (event->attr.sample_id_all)  in perf_event__output_id_sample()
6948 				 struct perf_event *event,  in perf_output_read_one()  argument
6951 	u64 read_format = event->attr.read_format;  in perf_output_read_one()
6955 	values[n++] = perf_event_count(event);  in perf_output_read_one()
6958 			atomic64_read(&event->child_total_time_enabled);  in perf_output_read_one()
6962 			atomic64_read(&event->child_total_time_running);  in perf_output_read_one()
6965 		values[n++] = primary_event_id(event);  in perf_output_read_one()
6967 		values[n++] = atomic64_read(&event->lost_samples);  in perf_output_read_one()
6973 			    struct perf_event *event,  in perf_output_read_group()  argument
6976 	struct perf_event *leader = event->group_leader, *sub;  in perf_output_read_group()
6977 	u64 read_format = event->attr.read_format;  in perf_output_read_group()
6996 	if ((leader != event) &&  in perf_output_read_group()
7011 		if ((sub != event) &&  in perf_output_read_group()
7038 			     struct perf_event *event)  in perf_output_read()  argument
7041 	u64 read_format = event->attr.read_format;  in perf_output_read()
7045 	 * based on snapshot values taken when the event  in perf_output_read()
7053 		calc_timer_values(event, &now, &enabled, &running);  in perf_output_read()
7055 	if (event->attr.read_format & PERF_FORMAT_GROUP)  in perf_output_read()
7056 		perf_output_read_group(handle, event, enabled, running);  in perf_output_read()
7058 		perf_output_read_one(handle, event, enabled, running);  in perf_output_read()
7064 			struct perf_event *event)  in perf_output_sample()  argument
7098 		perf_output_read(handle, event);  in perf_output_sample()
7149 			if (branch_sample_hw_index(event))  in perf_output_sample()
7171 			u64 mask = event->attr.sample_regs_user;  in perf_output_sample()
7202 			u64 mask = event->attr.sample_regs_intr;  in perf_output_sample()
7226 			perf_aux_sample_output(event, handle, data);  in perf_output_sample()
7229 	if (!event->attr.watermark) {  in perf_output_sample()
7230 		int wakeup_events = event->attr.wakeup_events;  in perf_output_sample()
7369 perf_callchain(struct perf_event *event, struct pt_regs *regs)  in perf_callchain()  argument
7371 	bool kernel = !event->attr.exclude_callchain_kernel;  in perf_callchain()
7372 	bool user   = !event->attr.exclude_callchain_user;  in perf_callchain()
7374 	bool crosstask = event->ctx->task && event->ctx->task != current;  in perf_callchain()
7375 	const u32 max_stack = event->attr.sample_max_stack;  in perf_callchain()
7388 			 struct perf_event *event,  in perf_prepare_sample()  argument
7391 	u64 sample_type = event->attr.sample_type;  in perf_prepare_sample()
7395 	header->size = sizeof(*header) + event->header_size;  in perf_prepare_sample()
7405 	__perf_event_header__init_id(header, data, event, filtered_sample_type);  in perf_prepare_sample()
7414 			data->callchain = perf_callchain(event, regs);  in perf_prepare_sample()
7450 			if (branch_sample_hw_index(event))  in perf_prepare_sample()
7467 			u64 mask = event->attr.sample_regs_user;  in perf_prepare_sample()
7481 		u16 stack_size = event->attr.sample_stack_user;  in perf_prepare_sample()
7520 			u64 mask = event->attr.sample_regs_intr;  in perf_prepare_sample()
7565 			     event->attr.aux_sample_size);  in perf_prepare_sample()
7567 		size = perf_prepare_sample_aux(event, data, size);  in perf_prepare_sample()
7584 __perf_event_output(struct perf_event *event,  in __perf_event_output()  argument
7599 	perf_prepare_sample(&header, data, event, regs);  in __perf_event_output()
7601 	err = output_begin(&handle, data, event, header.size);  in __perf_event_output()
7605 	perf_output_sample(&handle, &header, data, event);  in __perf_event_output()
7615 perf_event_output_forward(struct perf_event *event,  in perf_event_output_forward()  argument
7619 	__perf_event_output(event, data, regs, perf_output_begin_forward);  in perf_event_output_forward()
7623 perf_event_output_backward(struct perf_event *event,  in perf_event_output_backward()  argument
7627 	__perf_event_output(event, data, regs, perf_output_begin_backward);  in perf_event_output_backward()
7631 perf_event_output(struct perf_event *event,  in perf_event_output()  argument
7635 	return __perf_event_output(event, data, regs, perf_output_begin);  in perf_event_output()
7650 perf_event_read_event(struct perf_event *event,  in perf_event_read_event()  argument
7659 			.size = sizeof(read_event) + event->read_size,  in perf_event_read_event()
7661 		.pid = perf_event_pid(event, task),  in perf_event_read_event()
7662 		.tid = perf_event_tid(event, task),  in perf_event_read_event()
7666 	perf_event_header__init_id(&read_event.header, &sample, event);  in perf_event_read_event()
7667 	ret = perf_output_begin(&handle, &sample, event, read_event.header.size);  in perf_event_read_event()
7672 	perf_output_read(&handle, event);  in perf_event_read_event()
7673 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_read_event()
7678 typedef void (perf_iterate_f)(struct perf_event *event, void *data);
7685 	struct perf_event *event;  in perf_iterate_ctx()  local
7687 	list_for_each_entry_rcu(event, &ctx->event_list, event_entry) {  in perf_iterate_ctx()
7689 			if (event->state < PERF_EVENT_STATE_INACTIVE)  in perf_iterate_ctx()
7691 			if (!event_filter_match(event))  in perf_iterate_ctx()
7695 		output(event, data);  in perf_iterate_ctx()
7702 	struct perf_event *event;  in perf_iterate_sb_cpu()  local
7704 	list_for_each_entry_rcu(event, &pel->list, sb_list) {  in perf_iterate_sb_cpu()
7707 		 * if we observe event->ctx, both event and ctx will be  in perf_iterate_sb_cpu()
7710 		if (!smp_load_acquire(&event->ctx))  in perf_iterate_sb_cpu()
7713 		if (event->state < PERF_EVENT_STATE_INACTIVE)  in perf_iterate_sb_cpu()
7715 		if (!event_filter_match(event))  in perf_iterate_sb_cpu()
7717 		output(event, data);  in perf_iterate_sb_cpu()
7725  * your event, otherwise it might not get delivered.
7763 static void perf_event_addr_filters_exec(struct perf_event *event, void *data)  in perf_event_addr_filters_exec()  argument
7765 	struct perf_addr_filters_head *ifh = perf_event_addr_filters(event);  in perf_event_addr_filters_exec()
7770 	if (!has_addr_filter(event))  in perf_event_addr_filters_exec()
7776 			event->addr_filter_ranges[count].start = 0;  in perf_event_addr_filters_exec()
7777 			event->addr_filter_ranges[count].size = 0;  in perf_event_addr_filters_exec()
7785 		event->addr_filters_gen++;  in perf_event_addr_filters_exec()
7789 		perf_event_stop(event, 1);  in perf_event_addr_filters_exec()
7816 static void __perf_event_output_stop(struct perf_event *event, void *data)  in __perf_event_output_stop()  argument
7818 	struct perf_event *parent = event->parent;  in __perf_event_output_stop()
7822 		.event	= event,  in __perf_event_output_stop()
7825 	if (!has_aux(event))  in __perf_event_output_stop()
7829 		parent = event;  in __perf_event_output_stop()
7835 	 * We are using event::rb to determine if the event should be stopped,  in __perf_event_output_stop()
7837 	 * which will make us skip the event that actually needs to be stopped.  in __perf_event_output_stop()
7838 	 * So ring_buffer_attach() has to stop an aux event before re-assigning  in __perf_event_output_stop()
7847 	struct perf_event *event = info;  in __perf_pmu_output_stop()  local
7848 	struct pmu *pmu = event->ctx->pmu;  in __perf_pmu_output_stop()
7851 		.rb	= event->rb,  in __perf_pmu_output_stop()
7864 static void perf_pmu_output_stop(struct perf_event *event)  in perf_pmu_output_stop()  argument
7871 	list_for_each_entry_rcu(iter, &event->rb->event_list, rb_entry) {  in perf_pmu_output_stop()
7875 		 * sufficient to stop the event itself if it's active, since  in perf_pmu_output_stop()
7885 		err = cpu_function_call(cpu, __perf_pmu_output_stop, event);  in perf_pmu_output_stop()
7915 static int perf_event_task_match(struct perf_event *event)  in perf_event_task_match()  argument
7917 	return event->attr.comm  || event->attr.mmap ||  in perf_event_task_match()
7918 	       event->attr.mmap2 || event->attr.mmap_data ||  in perf_event_task_match()
7919 	       event->attr.task;  in perf_event_task_match()
7922 static void perf_event_task_output(struct perf_event *event,  in perf_event_task_output()  argument
7931 	if (!perf_event_task_match(event))  in perf_event_task_output()
7934 	perf_event_header__init_id(&task_event->event_id.header, &sample, event);  in perf_event_task_output()
7936 	ret = perf_output_begin(&handle, &sample, event,  in perf_event_task_output()
7941 	task_event->event_id.pid = perf_event_pid(event, task);  in perf_event_task_output()
7942 	task_event->event_id.tid = perf_event_tid(event, task);  in perf_event_task_output()
7945 		task_event->event_id.ppid = perf_event_pid(event,  in perf_event_task_output()
7947 		task_event->event_id.ptid = perf_event_pid(event,  in perf_event_task_output()
7950 		task_event->event_id.ppid = perf_event_pid(event, current);  in perf_event_task_output()
7951 		task_event->event_id.ptid = perf_event_tid(event, current);  in perf_event_task_output()
7954 	task_event->event_id.time = perf_event_clock(event);  in perf_event_task_output()
7958 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_task_output()
8021 static int perf_event_comm_match(struct perf_event *event)  in perf_event_comm_match()  argument
8023 	return event->attr.comm;  in perf_event_comm_match()
8026 static void perf_event_comm_output(struct perf_event *event,  in perf_event_comm_output()  argument
8035 	if (!perf_event_comm_match(event))  in perf_event_comm_output()
8038 	perf_event_header__init_id(&comm_event->event_id.header, &sample, event);  in perf_event_comm_output()
8039 	ret = perf_output_begin(&handle, &sample, event,  in perf_event_comm_output()
8045 	comm_event->event_id.pid = perf_event_pid(event, comm_event->task);  in perf_event_comm_output()
8046 	comm_event->event_id.tid = perf_event_tid(event, comm_event->task);  in perf_event_comm_output()
8052 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_comm_output()
8120 static int perf_event_namespaces_match(struct perf_event *event)  in perf_event_namespaces_match()  argument
8122 	return event->attr.namespaces;  in perf_event_namespaces_match()
8125 static void perf_event_namespaces_output(struct perf_event *event,  in perf_event_namespaces_output()  argument
8134 	if (!perf_event_namespaces_match(event))  in perf_event_namespaces_output()
8138 				   &sample, event);  in perf_event_namespaces_output()
8139 	ret = perf_output_begin(&handle, &sample, event,  in perf_event_namespaces_output()
8144 	namespaces_event->event_id.pid = perf_event_pid(event,  in perf_event_namespaces_output()
8146 	namespaces_event->event_id.tid = perf_event_tid(event,  in perf_event_namespaces_output()
8151 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_namespaces_output()
8248 static int perf_event_cgroup_match(struct perf_event *event)  in perf_event_cgroup_match()  argument
8250 	return event->attr.cgroup;  in perf_event_cgroup_match()
8253 static void perf_event_cgroup_output(struct perf_event *event, void *data)  in perf_event_cgroup_output()  argument
8261 	if (!perf_event_cgroup_match(event))  in perf_event_cgroup_output()
8265 				   &sample, event);  in perf_event_cgroup_output()
8266 	ret = perf_output_begin(&handle, &sample, event,  in perf_event_cgroup_output()
8274 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_cgroup_output()
8359 static int perf_event_mmap_match(struct perf_event *event,  in perf_event_mmap_match()  argument
8366 	return (!executable && event->attr.mmap_data) ||  in perf_event_mmap_match()
8367 	       (executable && (event->attr.mmap || event->attr.mmap2));  in perf_event_mmap_match()
8370 static void perf_event_mmap_output(struct perf_event *event,  in perf_event_mmap_output()  argument
8381 	if (!perf_event_mmap_match(event, data))  in perf_event_mmap_output()
8384 	if (event->attr.mmap2) {  in perf_event_mmap_output()
8394 	perf_event_header__init_id(&mmap_event->event_id.header, &sample, event);  in perf_event_mmap_output()
8395 	ret = perf_output_begin(&handle, &sample, event,  in perf_event_mmap_output()
8400 	mmap_event->event_id.pid = perf_event_pid(event, current);  in perf_event_mmap_output()
8401 	mmap_event->event_id.tid = perf_event_tid(event, current);  in perf_event_mmap_output()
8403 	use_build_id = event->attr.build_id && mmap_event->build_id_size;  in perf_event_mmap_output()
8405 	if (event->attr.mmap2 && use_build_id)  in perf_event_mmap_output()
8410 	if (event->attr.mmap2) {  in perf_event_mmap_output()
8429 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_mmap_output()
8601 static void __perf_addr_filters_adjust(struct perf_event *event, void *data)  in __perf_addr_filters_adjust()  argument
8603 	struct perf_addr_filters_head *ifh = perf_event_addr_filters(event);  in __perf_addr_filters_adjust()
8609 	if (!has_addr_filter(event))  in __perf_addr_filters_adjust()
8618 						&event->addr_filter_ranges[count]))  in __perf_addr_filters_adjust()
8625 		event->addr_filters_gen++;  in __perf_addr_filters_adjust()
8629 		perf_event_stop(event, 1);  in __perf_addr_filters_adjust()
8693 void perf_event_aux_event(struct perf_event *event, unsigned long head,  in perf_event_aux_event()  argument
8715 	perf_event_header__init_id(&rec.header, &sample, event);  in perf_event_aux_event()
8716 	ret = perf_output_begin(&handle, &sample, event, rec.header.size);  in perf_event_aux_event()
8722 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_aux_event()
8730 void perf_log_lost_samples(struct perf_event *event, u64 lost)  in perf_log_lost_samples()  argument
8748 	perf_event_header__init_id(&lost_samples_event.header, &sample, event);  in perf_log_lost_samples()
8750 	ret = perf_output_begin(&handle, &sample, event,  in perf_log_lost_samples()
8756 	perf_event__output_id_sample(event, &handle, &sample);  in perf_log_lost_samples()
8775 static int perf_event_switch_match(struct perf_event *event)  in perf_event_switch_match()  argument
8777 	return event->attr.context_switch;  in perf_event_switch_match()
8780 static void perf_event_switch_output(struct perf_event *event, void *data)  in perf_event_switch_output()  argument
8787 	if (!perf_event_switch_match(event))  in perf_event_switch_output()
8791 	if (event->ctx->task) {  in perf_event_switch_output()
8798 					perf_event_pid(event, se->next_prev);  in perf_event_switch_output()
8800 					perf_event_tid(event, se->next_prev);  in perf_event_switch_output()
8803 	perf_event_header__init_id(&se->event_id.header, &sample, event);  in perf_event_switch_output()
8805 	ret = perf_output_begin(&handle, &sample, event, se->event_id.header.size);  in perf_event_switch_output()
8809 	if (event->ctx->task)  in perf_event_switch_output()
8814 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_switch_output()
8852 static void perf_log_throttle(struct perf_event *event, int enable)  in perf_log_throttle()  argument
8869 		.time		= perf_event_clock(event),  in perf_log_throttle()
8870 		.id		= primary_event_id(event),  in perf_log_throttle()
8871 		.stream_id	= event->id,  in perf_log_throttle()
8877 	perf_event_header__init_id(&throttle_event.header, &sample, event);  in perf_log_throttle()
8879 	ret = perf_output_begin(&handle, &sample, event,  in perf_log_throttle()
8885 	perf_event__output_id_sample(event, &handle, &sample);  in perf_log_throttle()
8905 static int perf_event_ksymbol_match(struct perf_event *event)  in perf_event_ksymbol_match()  argument
8907 	return event->attr.ksymbol;  in perf_event_ksymbol_match()
8910 static void perf_event_ksymbol_output(struct perf_event *event, void *data)  in perf_event_ksymbol_output()  argument
8917 	if (!perf_event_ksymbol_match(event))  in perf_event_ksymbol_output()
8921 				   &sample, event);  in perf_event_ksymbol_output()
8922 	ret = perf_output_begin(&handle, &sample, event,  in perf_event_ksymbol_output()
8929 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_ksymbol_output()
8995 static int perf_event_bpf_match(struct perf_event *event)  in perf_event_bpf_match()  argument
8997 	return event->attr.bpf_event;  in perf_event_bpf_match()
9000 static void perf_event_bpf_output(struct perf_event *event, void *data)  in perf_event_bpf_output()  argument
9007 	if (!perf_event_bpf_match(event))  in perf_event_bpf_output()
9011 				   &sample, event);  in perf_event_bpf_output()
9012 	ret = perf_output_begin(&handle, data, event,  in perf_event_bpf_output()
9018 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_bpf_output()
9103 static int perf_event_text_poke_match(struct perf_event *event)  in perf_event_text_poke_match()  argument
9105 	return event->attr.text_poke;  in perf_event_text_poke_match()
9108 static void perf_event_text_poke_output(struct perf_event *event, void *data)  in perf_event_text_poke_output()  argument
9116 	if (!perf_event_text_poke_match(event))  in perf_event_text_poke_output()
9119 	perf_event_header__init_id(&text_poke_event->event_id.header, &sample, event);  in perf_event_text_poke_output()
9121 	ret = perf_output_begin(&handle, &sample, event,  in perf_event_text_poke_output()
9136 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_text_poke_output()
9173 void perf_event_itrace_started(struct perf_event *event)  in perf_event_itrace_started()  argument
9175 	event->attach_state |= PERF_ATTACH_ITRACE;  in perf_event_itrace_started()
9178 static void perf_log_itrace_start(struct perf_event *event)  in perf_log_itrace_start()  argument
9189 	if (event->parent)  in perf_log_itrace_start()
9190 		event = event->parent;  in perf_log_itrace_start()
9192 	if (!(event->pmu->capabilities & PERF_PMU_CAP_ITRACE) ||  in perf_log_itrace_start()
9193 	    event->attach_state & PERF_ATTACH_ITRACE)  in perf_log_itrace_start()
9199 	rec.pid	= perf_event_pid(event, current);  in perf_log_itrace_start()
9200 	rec.tid	= perf_event_tid(event, current);  in perf_log_itrace_start()
9202 	perf_event_header__init_id(&rec.header, &sample, event);  in perf_log_itrace_start()
9203 	ret = perf_output_begin(&handle, &sample, event, rec.header.size);  in perf_log_itrace_start()
9209 	perf_event__output_id_sample(event, &handle, &sample);  in perf_log_itrace_start()
9214 void perf_report_aux_output_id(struct perf_event *event, u64 hw_id)  in perf_report_aux_output_id()  argument
9224 	if (event->parent)  in perf_report_aux_output_id()
9225 		event = event->parent;  in perf_report_aux_output_id()
9232 	perf_event_header__init_id(&rec.header, &sample, event);  in perf_report_aux_output_id()
9233 	ret = perf_output_begin(&handle, &sample, event, rec.header.size);  in perf_report_aux_output_id()
9239 	perf_event__output_id_sample(event, &handle, &sample);  in perf_report_aux_output_id()
9245 __perf_event_account_interrupt(struct perf_event *event, int throttle)  in __perf_event_account_interrupt()  argument
9247 	struct hw_perf_event *hwc = &event->hw;  in __perf_event_account_interrupt()
9262 			perf_log_throttle(event, 0);  in __perf_event_account_interrupt()
9267 	if (event->attr.freq) {  in __perf_event_account_interrupt()
9274 			perf_adjust_period(event, delta, hwc->last_period, true);  in __perf_event_account_interrupt()
9280 int perf_event_account_interrupt(struct perf_event *event)  in perf_event_account_interrupt()  argument
9282 	return __perf_event_account_interrupt(event, 1);  in perf_event_account_interrupt()
9285 static inline bool sample_is_allowed(struct perf_event *event, struct pt_regs *regs)  in sample_is_allowed()  argument
9292 	if (event->attr.exclude_kernel && !user_mode(regs))  in sample_is_allowed()
9299  * Generic event overflow handling, sampling.
9302 static int __perf_event_overflow(struct perf_event *event,  in __perf_event_overflow()  argument
9306 	int events = atomic_read(&event->event_limit);  in __perf_event_overflow()
9313 	if (unlikely(!is_sampling_event(event)))  in __perf_event_overflow()
9316 	ret = __perf_event_account_interrupt(event, throttle);  in __perf_event_overflow()
9323 	event->pending_kill = POLL_IN;  in __perf_event_overflow()
9324 	if (events && atomic_dec_and_test(&event->event_limit)) {  in __perf_event_overflow()
9326 		event->pending_kill = POLL_HUP;  in __perf_event_overflow()
9327 		perf_event_disable_inatomic(event);  in __perf_event_overflow()
9330 	if (event->attr.sigtrap) {  in __perf_event_overflow()
9334 		 * it is the first event, on the other hand, we should also not  in __perf_event_overflow()
9337 		bool valid_sample = sample_is_allowed(event, regs);  in __perf_event_overflow()
9342 		if (!event->pending_sigtrap) {  in __perf_event_overflow()
9343 			event->pending_sigtrap = pending_id;  in __perf_event_overflow()
9344 			local_inc(&event->ctx->nr_pending);  in __perf_event_overflow()
9345 		} else if (event->attr.exclude_kernel && valid_sample) {  in __perf_event_overflow()
9358 			WARN_ON_ONCE(event->pending_sigtrap != pending_id);  in __perf_event_overflow()
9361 		event->pending_addr = 0;  in __perf_event_overflow()
9363 			event->pending_addr = data->addr;  in __perf_event_overflow()
9364 		irq_work_queue(&event->pending_irq);  in __perf_event_overflow()
9367 	READ_ONCE(event->overflow_handler)(event, data, regs);  in __perf_event_overflow()  local
9369 	if (*perf_event_fasync(event) && event->pending_kill) {  in __perf_event_overflow()
9370 		event->pending_wakeup = 1;  in __perf_event_overflow()
9371 		irq_work_queue(&event->pending_irq);  in __perf_event_overflow()
9377 int perf_event_overflow(struct perf_event *event,  in perf_event_overflow()  argument
9381 	return __perf_event_overflow(event, 1, data, regs);  in perf_event_overflow()
9385  * Generic software event infrastructure
9400  * We directly increment event->count and keep a second value in
9401  * event->hw.period_left to count intervals. This period event
9406 u64 perf_swevent_set_period(struct perf_event *event)  in perf_swevent_set_period()  argument
9408 	struct hw_perf_event *hwc = &event->hw;  in perf_swevent_set_period()
9429 static void perf_swevent_overflow(struct perf_event *event, u64 overflow,  in perf_swevent_overflow()  argument
9433 	struct hw_perf_event *hwc = &event->hw;  in perf_swevent_overflow()
9437 		overflow = perf_swevent_set_period(event);  in perf_swevent_overflow()
9443 		if (__perf_event_overflow(event, throttle,  in perf_swevent_overflow()
9455 static void perf_swevent_event(struct perf_event *event, u64 nr,  in perf_swevent_event()  argument
9459 	struct hw_perf_event *hwc = &event->hw;  in perf_swevent_event()
9461 	local64_add(nr, &event->count);  in perf_swevent_event()
9466 	if (!is_sampling_event(event))  in perf_swevent_event()
9469 	if ((event->attr.sample_type & PERF_SAMPLE_PERIOD) && !event->attr.freq) {  in perf_swevent_event()
9471 		return perf_swevent_overflow(event, 1, data, regs);  in perf_swevent_event()
9473 		data->period = event->hw.last_period;  in perf_swevent_event()
9475 	if (nr == 1 && hwc->sample_period == 1 && !event->attr.freq)  in perf_swevent_event()
9476 		return perf_swevent_overflow(event, 1, data, regs);  in perf_swevent_event()
9481 	perf_swevent_overflow(event, 0, data, regs);  in perf_swevent_event()
9484 static int perf_exclude_event(struct perf_event *event,  in perf_exclude_event()  argument
9487 	if (event->hw.state & PERF_HES_STOPPED)  in perf_exclude_event()
9491 		if (event->attr.exclude_user && user_mode(regs))  in perf_exclude_event()
9494 		if (event->attr.exclude_kernel && !user_mode(regs))  in perf_exclude_event()
9501 static int perf_swevent_match(struct perf_event *event,  in perf_swevent_match()  argument
9507 	if (event->attr.type != type)  in perf_swevent_match()
9510 	if (event->attr.config != event_id)  in perf_swevent_match()
9513 	if (perf_exclude_event(event, regs))  in perf_swevent_match()
9547 /* For the event head insertion and removal in the hlist */
9549 find_swevent_head(struct swevent_htable *swhash, struct perf_event *event)  in find_swevent_head()  argument
9552 	u32 event_id = event->attr.config;  in find_swevent_head()
9553 	u64 type = event->attr.type;  in find_swevent_head()
9556 	 * Event scheduling is always serialized against hlist allocation  in find_swevent_head()
9561 					  lockdep_is_held(&event->ctx->lock));  in find_swevent_head()
9574 	struct perf_event *event;  in do_perf_sw_event()  local
9582 	hlist_for_each_entry_rcu(event, head, hlist_entry) {  in do_perf_sw_event()
9583 		if (perf_swevent_match(event, type, event_id, data, regs))  in do_perf_sw_event()
9584 			perf_swevent_event(event, nr, data, regs);  in do_perf_sw_event()
9634 static void perf_swevent_read(struct perf_event *event)  in perf_swevent_read()  argument
9638 static int perf_swevent_add(struct perf_event *event, int flags)  in perf_swevent_add()  argument
9641 	struct hw_perf_event *hwc = &event->hw;  in perf_swevent_add()
9644 	if (is_sampling_event(event)) {  in perf_swevent_add()
9646 		perf_swevent_set_period(event);  in perf_swevent_add()
9651 	head = find_swevent_head(swhash, event);  in perf_swevent_add()
9655 	hlist_add_head_rcu(&event->hlist_entry, head);  in perf_swevent_add()
9656 	perf_event_update_userpage(event);  in perf_swevent_add()
9661 static void perf_swevent_del(struct perf_event *event, int flags)  in perf_swevent_del()  argument
9663 	hlist_del_rcu(&event->hlist_entry);  in perf_swevent_del()
9666 static void perf_swevent_start(struct perf_event *event, int flags)  in perf_swevent_start()  argument
9668 	event->hw.state = 0;  in perf_swevent_start()
9671 static void perf_swevent_stop(struct perf_event *event, int flags)  in perf_swevent_stop()  argument
9673 	event->hw.state = PERF_HES_STOPPED;  in perf_swevent_stop()
9765 static void sw_perf_event_destroy(struct perf_event *event)  in sw_perf_event_destroy()  argument
9767 	u64 event_id = event->attr.config;  in sw_perf_event_destroy()
9769 	WARN_ON(event->parent);  in sw_perf_event_destroy()
9775 static int perf_swevent_init(struct perf_event *event)  in perf_swevent_init()  argument
9777 	u64 event_id = event->attr.config;  in perf_swevent_init()
9779 	if (event->attr.type != PERF_TYPE_SOFTWARE)  in perf_swevent_init()
9785 	if (has_branch_stack(event))  in perf_swevent_init()
9800 	if (!event->parent) {  in perf_swevent_init()
9808 		event->destroy = sw_perf_event_destroy;  in perf_swevent_init()
9829 static int perf_tp_filter_match(struct perf_event *event,  in perf_tp_filter_match()  argument
9835 	if (event->parent)  in perf_tp_filter_match()
9836 		event = event->parent;  in perf_tp_filter_match()
9838 	if (likely(!event->filter) || filter_match_preds(event->filter, record))  in perf_tp_filter_match()
9843 static int perf_tp_event_match(struct perf_event *event,  in perf_tp_event_match()  argument
9847 	if (event->hw.state & PERF_HES_STOPPED)  in perf_tp_event_match()
9852 	if (event->attr.exclude_kernel && !user_mode(regs))  in perf_tp_event_match()
9855 	if (!perf_tp_filter_match(event, data))  in perf_tp_event_match()
9873 	perf_tp_event(call->event.type, count, raw_data, size, regs, head,  in perf_trace_run_bpf_submit()
9883 	struct perf_event *event;  in perf_tp_event()  local
9898 	hlist_for_each_entry_rcu(event, head, hlist_entry) {  in perf_tp_event()
9899 		if (perf_tp_event_match(event, &data, regs))  in perf_tp_event()
9900 			perf_swevent_event(event, count, &data, regs);  in perf_tp_event()
9905 	 * deliver this event there too.  in perf_tp_event()
9916 		list_for_each_entry_rcu(event, &ctx->event_list, event_entry) {  in perf_tp_event()
9917 			if (event->cpu != smp_processor_id())  in perf_tp_event()
9919 			if (event->attr.type != PERF_TYPE_TRACEPOINT)  in perf_tp_event()
9921 			if (event->attr.config != entry->type)  in perf_tp_event()
9924 			if (event->attr.sigtrap)  in perf_tp_event()
9926 			if (perf_tp_event_match(event, &data, regs))  in perf_tp_event()
9927 				perf_swevent_event(event, count, &data, regs);  in perf_tp_event()
9937 static void tp_perf_event_destroy(struct perf_event *event)  in tp_perf_event_destroy()  argument
9939 	perf_trace_destroy(event);  in tp_perf_event_destroy()
9942 static int perf_tp_event_init(struct perf_event *event)  in perf_tp_event_init()  argument
9946 	if (event->attr.type != PERF_TYPE_TRACEPOINT)  in perf_tp_event_init()
9952 	if (has_branch_stack(event))  in perf_tp_event_init()
9955 	err = perf_trace_init(event);  in perf_tp_event_init()
9959 	event->destroy = tp_perf_event_destroy;  in perf_tp_event_init()
10015 static int perf_kprobe_event_init(struct perf_event *event);
10027 static int perf_kprobe_event_init(struct perf_event *event)  in perf_kprobe_event_init()  argument
10032 	if (event->attr.type != perf_kprobe.type)  in perf_kprobe_event_init()
10041 	if (has_branch_stack(event))  in perf_kprobe_event_init()
10044 	is_retprobe = event->attr.config & PERF_PROBE_CONFIG_IS_RETPROBE;  in perf_kprobe_event_init()
10045 	err = perf_kprobe_init(event, is_retprobe);  in perf_kprobe_event_init()
10049 	event->destroy = perf_kprobe_destroy;  in perf_kprobe_event_init()
10074 static int perf_uprobe_event_init(struct perf_event *event);
10086 static int perf_uprobe_event_init(struct perf_event *event)  in perf_uprobe_event_init()  argument
10092 	if (event->attr.type != perf_uprobe.type)  in perf_uprobe_event_init()
10101 	if (has_branch_stack(event))  in perf_uprobe_event_init()
10104 	is_retprobe = event->attr.config & PERF_PROBE_CONFIG_IS_RETPROBE;  in perf_uprobe_event_init()
10105 	ref_ctr_offset = event->attr.config >> PERF_UPROBE_REF_CTR_OFFSET_SHIFT;  in perf_uprobe_event_init()
10106 	err = perf_uprobe_init(event, ref_ctr_offset, is_retprobe);  in perf_uprobe_event_init()
10110 	event->destroy = perf_uprobe_destroy;  in perf_uprobe_event_init()
10127 static void perf_event_free_filter(struct perf_event *event)  in perf_event_free_filter()  argument
10129 	ftrace_profile_free_filter(event);  in perf_event_free_filter()
10133 static void bpf_overflow_handler(struct perf_event *event,  in bpf_overflow_handler()  argument
10139 		.event = event,  in bpf_overflow_handler()
10148 	prog = READ_ONCE(event->prog);  in bpf_overflow_handler()
10151 		    (event->attr.sample_type & PERF_SAMPLE_CALLCHAIN) &&  in bpf_overflow_handler()
10153 			data->callchain = perf_callchain(event, regs);  in bpf_overflow_handler()
10165 	event->orig_overflow_handler(event, data, regs);  in bpf_overflow_handler()
10168 static int perf_event_set_bpf_handler(struct perf_event *event,  in perf_event_set_bpf_handler()  argument
10172 	if (event->overflow_handler_context)  in perf_event_set_bpf_handler()
10176 	if (event->prog)  in perf_event_set_bpf_handler()
10182 	if (event->attr.precise_ip &&  in perf_event_set_bpf_handler()
10184 	    (!(event->attr.sample_type & PERF_SAMPLE_CALLCHAIN) ||  in perf_event_set_bpf_handler()
10185 	     event->attr.exclude_callchain_kernel ||  in perf_event_set_bpf_handler()
10186 	     event->attr.exclude_callchain_user)) {  in perf_event_set_bpf_handler()
10199 	event->prog = prog;  in perf_event_set_bpf_handler()
10200 	event->bpf_cookie = bpf_cookie;  in perf_event_set_bpf_handler()
10201 	event->orig_overflow_handler = READ_ONCE(event->overflow_handler);  in perf_event_set_bpf_handler()
10202 	WRITE_ONCE(event->overflow_handler, bpf_overflow_handler);  in perf_event_set_bpf_handler()
10206 static void perf_event_free_bpf_handler(struct perf_event *event)  in perf_event_free_bpf_handler()  argument
10208 	struct bpf_prog *prog = event->prog;  in perf_event_free_bpf_handler()
10213 	WRITE_ONCE(event->overflow_handler, event->orig_overflow_handler);  in perf_event_free_bpf_handler()
10214 	event->prog = NULL;  in perf_event_free_bpf_handler()
10218 static int perf_event_set_bpf_handler(struct perf_event *event,  in perf_event_set_bpf_handler()  argument
10224 static void perf_event_free_bpf_handler(struct perf_event *event)  in perf_event_free_bpf_handler()  argument
10230  * returns true if the event is a tracepoint, or a kprobe/upprobe created
10233 static inline bool perf_event_is_tracing(struct perf_event *event)  in perf_event_is_tracing()  argument
10235 	if (event->pmu == &perf_tracepoint)  in perf_event_is_tracing()
10238 	if (event->pmu == &perf_kprobe)  in perf_event_is_tracing()
10242 	if (event->pmu == &perf_uprobe)  in perf_event_is_tracing()
10248 int perf_event_set_bpf_prog(struct perf_event *event, struct bpf_prog *prog,  in perf_event_set_bpf_prog()  argument
10253 	if (!perf_event_is_tracing(event))  in perf_event_set_bpf_prog()
10254 		return perf_event_set_bpf_handler(event, prog, bpf_cookie);  in perf_event_set_bpf_prog()
10256 	is_kprobe = event->tp_event->flags & TRACE_EVENT_FL_KPROBE;  in perf_event_set_bpf_prog()
10257 	is_uprobe = event->tp_event->flags & TRACE_EVENT_FL_UPROBE;  in perf_event_set_bpf_prog()
10258 	is_tracepoint = event->tp_event->flags & TRACE_EVENT_FL_TRACEPOINT;  in perf_event_set_bpf_prog()
10259 	is_syscall_tp = is_syscall_trace_event(event->tp_event);  in perf_event_set_bpf_prog()
10278 		int off = trace_event_get_offsets(event->tp_event);  in perf_event_set_bpf_prog()
10284 	return perf_event_attach_bpf_prog(event, prog, bpf_cookie);  in perf_event_set_bpf_prog()
10287 void perf_event_free_bpf_prog(struct perf_event *event)  in perf_event_free_bpf_prog()  argument
10289 	if (!perf_event_is_tracing(event)) {  in perf_event_free_bpf_prog()
10290 		perf_event_free_bpf_handler(event);  in perf_event_free_bpf_prog()
10293 	perf_event_detach_bpf_prog(event);  in perf_event_free_bpf_prog()
10302 static void perf_event_free_filter(struct perf_event *event)  in perf_event_free_filter()  argument
10306 int perf_event_set_bpf_prog(struct perf_event *event, struct bpf_prog *prog,  in perf_event_set_bpf_prog()  argument
10312 void perf_event_free_bpf_prog(struct perf_event *event)  in perf_event_free_bpf_prog()  argument
10334 perf_addr_filter_new(struct perf_event *event, struct list_head *filters)  in perf_addr_filter_new()  argument
10336 	int node = cpu_to_node(event->cpu == -1 ? 0 : event->cpu);  in perf_addr_filter_new()
10363 static void perf_addr_filters_splice(struct perf_event *event,  in perf_addr_filters_splice()  argument
10369 	if (!has_addr_filter(event))  in perf_addr_filters_splice()
10373 	if (event->parent)  in perf_addr_filters_splice()
10376 	raw_spin_lock_irqsave(&event->addr_filters.lock, flags);  in perf_addr_filters_splice()
10378 	list_splice_init(&event->addr_filters.list, &list);  in perf_addr_filters_splice()
10380 		list_splice(head, &event->addr_filters.list);  in perf_addr_filters_splice()
10382 	raw_spin_unlock_irqrestore(&event->addr_filters.lock, flags);  in perf_addr_filters_splice()
10409  * Update event's address range filters based on the
10412 static void perf_event_addr_filters_apply(struct perf_event *event)  in perf_event_addr_filters_apply()  argument
10414 	struct perf_addr_filters_head *ifh = perf_event_addr_filters(event);  in perf_event_addr_filters_apply()
10415 	struct task_struct *task = READ_ONCE(event->ctx->task);  in perf_event_addr_filters_apply()
10422 	 * We may observe TASK_TOMBSTONE, which means that the event tear-down  in perf_event_addr_filters_apply()
10443 			event->addr_filter_ranges[count].start = 0;  in perf_event_addr_filters_apply()
10444 			event->addr_filter_ranges[count].size = 0;  in perf_event_addr_filters_apply()
10446 			perf_addr_filter_apply(filter, mm, &event->addr_filter_ranges[count]);  in perf_event_addr_filters_apply()
10448 			event->addr_filter_ranges[count].start = filter->offset;  in perf_event_addr_filters_apply()
10449 			event->addr_filter_ranges[count].size  = filter->size;  in perf_event_addr_filters_apply()
10455 	event->addr_filters_gen++;  in perf_event_addr_filters_apply()
10465 	perf_event_stop(event, 1);  in perf_event_addr_filters_apply()
10519 perf_event_parse_addr_filter(struct perf_event *event, char *fstr,  in perf_event_parse_addr_filter()  argument
10546 			filter = perf_addr_filter_new(event, filters);  in perf_event_parse_addr_filter()
10605 		 * Make sure that it doesn't contradict itself or the event's  in perf_event_parse_addr_filter()
10632 				if (!event->ctx->task)  in perf_event_parse_addr_filter()
10647 				event->addr_filters.nr_file_filters++;  in perf_event_parse_addr_filter()
10676 perf_event_set_addr_filter(struct perf_event *event, char *filter_str)  in perf_event_set_addr_filter()  argument
10685 	lockdep_assert_held(&event->ctx->mutex);  in perf_event_set_addr_filter()
10687 	if (WARN_ON_ONCE(event->parent))  in perf_event_set_addr_filter()
10690 	ret = perf_event_parse_addr_filter(event, filter_str, &filters);  in perf_event_set_addr_filter()
10694 	ret = event->pmu->addr_filters_validate(&filters);  in perf_event_set_addr_filter()
10699 	perf_addr_filters_splice(event, &filters);  in perf_event_set_addr_filter()
10702 	perf_event_for_each_child(event, perf_event_addr_filters_apply);  in perf_event_set_addr_filter()
10710 	event->addr_filters.nr_file_filters = 0;  in perf_event_set_addr_filter()
10715 static int perf_event_set_filter(struct perf_event *event, void __user *arg)  in perf_event_set_filter()  argument
10725 	if (perf_event_is_tracing(event)) {  in perf_event_set_filter()
10726 		struct perf_event_context *ctx = event->ctx;  in perf_event_set_filter()
10736 		 * This can result in event getting moved to a different ctx,  in perf_event_set_filter()
10740 		ret = ftrace_profile_set_filter(event, event->attr.config, filter_str);  in perf_event_set_filter()
10744 	if (has_addr_filter(event))  in perf_event_set_filter()
10745 		ret = perf_event_set_addr_filter(event, filter_str);  in perf_event_set_filter()
10760 	struct perf_event *event;  in perf_swevent_hrtimer()  local
10763 	event = container_of(hrtimer, struct perf_event, hw.hrtimer);  in perf_swevent_hrtimer()
10765 	if (event->state != PERF_EVENT_STATE_ACTIVE)  in perf_swevent_hrtimer()
10768 	event->pmu->read(event);  in perf_swevent_hrtimer()
10770 	perf_sample_data_init(&data, 0, event->hw.last_period);  in perf_swevent_hrtimer()
10773 	if (regs && !perf_exclude_event(event, regs)) {  in perf_swevent_hrtimer()
10774 		if (!(event->attr.exclude_idle && is_idle_task(current)))  in perf_swevent_hrtimer()
10775 			if (__perf_event_overflow(event, 1, &data, regs))  in perf_swevent_hrtimer()
10779 	period = max_t(u64, 10000, event->hw.sample_period);  in perf_swevent_hrtimer()
10785 static void perf_swevent_start_hrtimer(struct perf_event *event)  in perf_swevent_start_hrtimer()  argument
10787 	struct hw_perf_event *hwc = &event->hw;  in perf_swevent_start_hrtimer()
10790 	if (!is_sampling_event(event))  in perf_swevent_start_hrtimer()
10806 static void perf_swevent_cancel_hrtimer(struct perf_event *event)  in perf_swevent_cancel_hrtimer()  argument
10808 	struct hw_perf_event *hwc = &event->hw;  in perf_swevent_cancel_hrtimer()
10810 	if (is_sampling_event(event)) {  in perf_swevent_cancel_hrtimer()
10818 static void perf_swevent_init_hrtimer(struct perf_event *event)  in perf_swevent_init_hrtimer()  argument
10820 	struct hw_perf_event *hwc = &event->hw;  in perf_swevent_init_hrtimer()
10822 	if (!is_sampling_event(event))  in perf_swevent_init_hrtimer()
10832 	if (event->attr.freq) {  in perf_swevent_init_hrtimer()
10833 		long freq = event->attr.sample_freq;  in perf_swevent_init_hrtimer()
10835 		event->attr.sample_period = NSEC_PER_SEC / freq;  in perf_swevent_init_hrtimer()
10836 		hwc->sample_period = event->attr.sample_period;  in perf_swevent_init_hrtimer()
10839 		event->attr.freq = 0;  in perf_swevent_init_hrtimer()
10844  * Software event: cpu wall time clock
10847 static void cpu_clock_event_update(struct perf_event *event)  in cpu_clock_event_update()  argument
10853 	prev = local64_xchg(&event->hw.prev_count, now);  in cpu_clock_event_update()
10854 	local64_add(now - prev, &event->count);  in cpu_clock_event_update()
10857 static void cpu_clock_event_start(struct perf_event *event, int flags)  in cpu_clock_event_start()  argument
10859 	local64_set(&event->hw.prev_count, local_clock());  in cpu_clock_event_start()
10860 	perf_swevent_start_hrtimer(event);  in cpu_clock_event_start()
10863 static void cpu_clock_event_stop(struct perf_event *event, int flags)  in cpu_clock_event_stop()  argument
10865 	perf_swevent_cancel_hrtimer(event);  in cpu_clock_event_stop()
10866 	cpu_clock_event_update(event);  in cpu_clock_event_stop()
10869 static int cpu_clock_event_add(struct perf_event *event, int flags)  in cpu_clock_event_add()  argument
10872 		cpu_clock_event_start(event, flags);  in cpu_clock_event_add()
10873 	perf_event_update_userpage(event);  in cpu_clock_event_add()
10878 static void cpu_clock_event_del(struct perf_event *event, int flags)  in cpu_clock_event_del()  argument
10880 	cpu_clock_event_stop(event, flags);  in cpu_clock_event_del()
10883 static void cpu_clock_event_read(struct perf_event *event)  in cpu_clock_event_read()  argument
10885 	cpu_clock_event_update(event);  in cpu_clock_event_read()
10888 static int cpu_clock_event_init(struct perf_event *event)  in cpu_clock_event_init()  argument
10890 	if (event->attr.type != PERF_TYPE_SOFTWARE)  in cpu_clock_event_init()
10893 	if (event->attr.config != PERF_COUNT_SW_CPU_CLOCK)  in cpu_clock_event_init()
10899 	if (has_branch_stack(event))  in cpu_clock_event_init()
10902 	perf_swevent_init_hrtimer(event);  in cpu_clock_event_init()
10921  * Software event: task time clock
10924 static void task_clock_event_update(struct perf_event *event, u64 now)  in task_clock_event_update()  argument
10929 	prev = local64_xchg(&event->hw.prev_count, now);  in task_clock_event_update()
10931 	local64_add(delta, &event->count);  in task_clock_event_update()
10934 static void task_clock_event_start(struct perf_event *event, int flags)  in task_clock_event_start()  argument
10936 	local64_set(&event->hw.prev_count, event->ctx->time);  in task_clock_event_start()
10937 	perf_swevent_start_hrtimer(event);  in task_clock_event_start()
10940 static void task_clock_event_stop(struct perf_event *event, int flags)  in task_clock_event_stop()  argument
10942 	perf_swevent_cancel_hrtimer(event);  in task_clock_event_stop()
10943 	task_clock_event_update(event, event->ctx->time);  in task_clock_event_stop()
10946 static int task_clock_event_add(struct perf_event *event, int flags)  in task_clock_event_add()  argument
10949 		task_clock_event_start(event, flags);  in task_clock_event_add()
10950 	perf_event_update_userpage(event);  in task_clock_event_add()
10955 static void task_clock_event_del(struct perf_event *event, int flags)  in task_clock_event_del()  argument
10957 	task_clock_event_stop(event, PERF_EF_UPDATE);  in task_clock_event_del()
10960 static void task_clock_event_read(struct perf_event *event)  in task_clock_event_read()  argument
10963 	u64 delta = now - event->ctx->timestamp;  in task_clock_event_read()
10964 	u64 time = event->ctx->time + delta;  in task_clock_event_read()
10966 	task_clock_event_update(event, time);  in task_clock_event_read()
10969 static int task_clock_event_init(struct perf_event *event)  in task_clock_event_init()  argument
10971 	if (event->attr.type != PERF_TYPE_SOFTWARE)  in task_clock_event_init()
10974 	if (event->attr.config != PERF_COUNT_SW_TASK_CLOCK)  in task_clock_event_init()
10980 	if (has_branch_stack(event))  in task_clock_event_init()
10983 	perf_swevent_init_hrtimer(event);  in task_clock_event_init()
11014 static int perf_event_nop_int(struct perf_event *event, u64 value)  in perf_event_nop_int()  argument
11056 static int perf_event_idx_default(struct perf_event *event)  in perf_event_idx_default()  argument
11342 	 * is fast, provided a valid software event is provided.  in perf_pmu_register()
11396 static inline bool has_extended_regs(struct perf_event *event)  in has_extended_regs()  argument
11398 	return (event->attr.sample_regs_user & PERF_REG_EXTENDED_MASK) ||  in has_extended_regs()
11399 	       (event->attr.sample_regs_intr & PERF_REG_EXTENDED_MASK);  in has_extended_regs()
11402 static int perf_try_init_event(struct pmu *pmu, struct perf_event *event)  in perf_try_init_event()  argument
11413 	 * if this is a sibling event, acquire the ctx->mutex to protect  in perf_try_init_event()
11416 	if (event->group_leader != event && pmu->task_ctx_nr != perf_sw_context) {  in perf_try_init_event()
11421 		ctx = perf_event_ctx_lock_nested(event->group_leader,  in perf_try_init_event()
11426 	event->pmu = pmu;  in perf_try_init_event()
11427 	ret = pmu->event_init(event);  in perf_try_init_event()
11430 		perf_event_ctx_unlock(event->group_leader, ctx);  in perf_try_init_event()
11434 		    has_extended_regs(event))  in perf_try_init_event()
11438 		    event_has_any_exclude_flag(event))  in perf_try_init_event()
11441 		if (ret && event->destroy)  in perf_try_init_event()
11442 			event->destroy(event);  in perf_try_init_event()
11451 static struct pmu *perf_init_event(struct perf_event *event)  in perf_init_event()  argument
11460 	if (event->parent && event->parent->pmu) {  in perf_init_event()
11461 		pmu = event->parent->pmu;  in perf_init_event()
11462 		ret = perf_try_init_event(pmu, event);  in perf_init_event()
11471 	type = event->attr.type;  in perf_init_event()
11473 		type = event->attr.config >> PERF_PMU_TYPE_SHIFT;  in perf_init_event()
11478 			event->attr.config &= PERF_HW_EVENT_MASK;  in perf_init_event()
11487 		if (event->attr.type != type && type != PERF_TYPE_RAW &&  in perf_init_event()
11491 		ret = perf_try_init_event(pmu, event);  in perf_init_event()
11492 		if (ret == -ENOENT && event->attr.type != type && !extended_type) {  in perf_init_event()
11493 			type = event->attr.type;  in perf_init_event()
11504 		ret = perf_try_init_event(pmu, event);  in perf_init_event()
11521 static void attach_sb_event(struct perf_event *event)  in attach_sb_event()  argument
11523 	struct pmu_event_list *pel = per_cpu_ptr(&pmu_sb_events, event->cpu);  in attach_sb_event()
11526 	list_add_rcu(&event->sb_list, &pel->list);  in attach_sb_event()
11537 static void account_pmu_sb_event(struct perf_event *event)  in account_pmu_sb_event()  argument
11539 	if (is_sb_event(event))  in account_pmu_sb_event()
11540 		attach_sb_event(event);  in account_pmu_sb_event()
11543 static void account_event_cpu(struct perf_event *event, int cpu)  in account_event_cpu()  argument
11545 	if (event->parent)  in account_event_cpu()
11548 	if (is_cgroup_event(event))  in account_event_cpu()
11573 static void account_event(struct perf_event *event)  in account_event()  argument
11577 	if (event->parent)  in account_event()
11580 	if (event->attach_state & (PERF_ATTACH_TASK | PERF_ATTACH_SCHED_CB))  in account_event()
11582 	if (event->attr.mmap || event->attr.mmap_data)  in account_event()
11584 	if (event->attr.build_id)  in account_event()
11586 	if (event->attr.comm)  in account_event()
11588 	if (event->attr.namespaces)  in account_event()
11590 	if (event->attr.cgroup)  in account_event()
11592 	if (event->attr.task)  in account_event()
11594 	if (event->attr.freq)  in account_event()
11596 	if (event->attr.context_switch) {  in account_event()
11600 	if (has_branch_stack(event))  in account_event()
11602 	if (is_cgroup_event(event))  in account_event()
11604 	if (event->attr.ksymbol)  in account_event()
11606 	if (event->attr.bpf_event)  in account_event()
11608 	if (event->attr.text_poke)  in account_event()
11639 	account_event_cpu(event, event->cpu);  in account_event()
11641 	account_pmu_sb_event(event);  in account_event()
11645  * Allocate and initialize an event structure
11656 	struct perf_event *event;  in perf_event_alloc()  local
11671 	event = kmem_cache_alloc_node(perf_event_cache, GFP_KERNEL | __GFP_ZERO,  in perf_event_alloc()
11673 	if (!event)  in perf_event_alloc()
11681 		group_leader = event;  in perf_event_alloc()
11683 	mutex_init(&event->child_mutex);  in perf_event_alloc()
11684 	INIT_LIST_HEAD(&event->child_list);  in perf_event_alloc()
11686 	INIT_LIST_HEAD(&event->event_entry);  in perf_event_alloc()
11687 	INIT_LIST_HEAD(&event->sibling_list);  in perf_event_alloc()
11688 	INIT_LIST_HEAD(&event->active_list);  in perf_event_alloc()
11689 	init_event_group(event);  in perf_event_alloc()
11690 	INIT_LIST_HEAD(&event->rb_entry);  in perf_event_alloc()
11691 	INIT_LIST_HEAD(&event->active_entry);  in perf_event_alloc()
11692 	INIT_LIST_HEAD(&event->addr_filters.list);  in perf_event_alloc()
11693 	INIT_HLIST_NODE(&event->hlist_entry);  in perf_event_alloc()
11696 	init_waitqueue_head(&event->waitq);  in perf_event_alloc()
11697 	init_irq_work(&event->pending_irq, perf_pending_irq);  in perf_event_alloc()
11698 	init_task_work(&event->pending_task, perf_pending_task);  in perf_event_alloc()
11700 	mutex_init(&event->mmap_mutex);  in perf_event_alloc()
11701 	raw_spin_lock_init(&event->addr_filters.lock);  in perf_event_alloc()
11703 	atomic_long_set(&event->refcount, 1);  in perf_event_alloc()
11704 	event->cpu		= cpu;  in perf_event_alloc()
11705 	event->attr		= *attr;  in perf_event_alloc()
11706 	event->group_leader	= group_leader;  in perf_event_alloc()
11707 	event->pmu		= NULL;  in perf_event_alloc()
11708 	event->oncpu		= -1;  in perf_event_alloc()
11710 	event->parent		= parent_event;  in perf_event_alloc()
11712 	event->ns		= get_pid_ns(task_active_pid_ns(current));  in perf_event_alloc()
11713 	event->id		= atomic64_inc_return(&perf_event_id);  in perf_event_alloc()
11715 	event->state		= PERF_EVENT_STATE_INACTIVE;  in perf_event_alloc()
11718 		event->event_caps = parent_event->event_caps;  in perf_event_alloc()
11721 		event->attach_state = PERF_ATTACH_TASK;  in perf_event_alloc()
11727 		event->hw.target = get_task_struct(task);  in perf_event_alloc()
11730 	event->clock = &local_clock;  in perf_event_alloc()
11732 		event->clock = parent_event->clock;  in perf_event_alloc()
11742 			event->prog = prog;  in perf_event_alloc()
11743 			event->orig_overflow_handler =  in perf_event_alloc()
11750 		event->overflow_handler	= overflow_handler;  in perf_event_alloc()
11751 		event->overflow_handler_context = context;  in perf_event_alloc()
11752 	} else if (is_write_backward(event)){  in perf_event_alloc()
11753 		event->overflow_handler = perf_event_output_backward;  in perf_event_alloc()
11754 		event->overflow_handler_context = NULL;  in perf_event_alloc()
11756 		event->overflow_handler = perf_event_output_forward;  in perf_event_alloc()
11757 		event->overflow_handler_context = NULL;  in perf_event_alloc()
11760 	perf_event__state_init(event);  in perf_event_alloc()
11764 	hwc = &event->hw;  in perf_event_alloc()
11779 	if (!has_branch_stack(event))  in perf_event_alloc()
11780 		event->attr.branch_sample_type = 0;  in perf_event_alloc()
11782 	pmu = perf_init_event(event);  in perf_event_alloc()
11797 	if (event->attr.aux_output &&  in perf_event_alloc()
11804 		err = perf_cgroup_connect(cgroup_fd, event, attr, group_leader);  in perf_event_alloc()
11809 	err = exclusive_event_init(event);  in perf_event_alloc()
11813 	if (has_addr_filter(event)) {  in perf_event_alloc()
11814 		event->addr_filter_ranges = kcalloc(pmu->nr_addr_filters,  in perf_event_alloc()
11817 		if (!event->addr_filter_ranges) {  in perf_event_alloc()
11826 		if (event->parent) {  in perf_event_alloc()
11827 			struct perf_addr_filters_head *ifh = perf_event_addr_filters(event);  in perf_event_alloc()
11830 			memcpy(event->addr_filter_ranges,  in perf_event_alloc()
11831 			       event->parent->addr_filter_ranges,  in perf_event_alloc()
11837 		event->addr_filters_gen = 1;  in perf_event_alloc()
11840 	if (!event->parent) {  in perf_event_alloc()
11841 		if (event->attr.sample_type & PERF_SAMPLE_CALLCHAIN) {  in perf_event_alloc()
11848 	err = security_perf_event_alloc(event);  in perf_event_alloc()
11853 	account_event(event);  in perf_event_alloc()
11855 	return event;  in perf_event_alloc()
11858 	if (!event->parent) {  in perf_event_alloc()
11859 		if (event->attr.sample_type & PERF_SAMPLE_CALLCHAIN)  in perf_event_alloc()
11863 	kfree(event->addr_filter_ranges);  in perf_event_alloc()
11866 	exclusive_event_destroy(event);  in perf_event_alloc()
11869 	if (is_cgroup_event(event))  in perf_event_alloc()
11870 		perf_detach_cgroup(event);  in perf_event_alloc()
11871 	if (event->destroy)  in perf_event_alloc()
11872 		event->destroy(event);  in perf_event_alloc()
11875 	if (event->hw.target)  in perf_event_alloc()
11876 		put_task_struct(event->hw.target);  in perf_event_alloc()
11877 	call_rcu(&event->rcu_head, free_event_rcu);  in perf_event_alloc()
12018 perf_event_set_output(struct perf_event *event, struct perf_event *output_event)  in perf_event_set_output()  argument
12024 		mutex_lock(&event->mmap_mutex);  in perf_event_set_output()
12029 	if (event == output_event)  in perf_event_set_output()
12035 	if (output_event->cpu != event->cpu)  in perf_event_set_output()
12041 	if (output_event->cpu == -1 && output_event->ctx != event->ctx)  in perf_event_set_output()
12047 	if (output_event->clock != event->clock)  in perf_event_set_output()
12054 	if (is_write_backward(output_event) != is_write_backward(event))  in perf_event_set_output()
12060 	if (has_aux(event) && has_aux(output_event) &&  in perf_event_set_output()
12061 	    event->pmu != output_event->pmu)  in perf_event_set_output()
12067 	 * restarts after every removal, it is guaranteed this new event is  in perf_event_set_output()
12071 	mutex_lock_double(&event->mmap_mutex, &output_event->mmap_mutex);  in perf_event_set_output()
12074 	if (atomic_read(&event->mmap_count))  in perf_event_set_output()
12090 	ring_buffer_attach(event, rb);  in perf_event_set_output()
12094 	mutex_unlock(&event->mmap_mutex);  in perf_event_set_output()
12102 static int perf_event_set_clock(struct perf_event *event, clockid_t clk_id)  in perf_event_set_clock()  argument
12108 		event->clock = &ktime_get_mono_fast_ns;  in perf_event_set_clock()
12113 		event->clock = &ktime_get_raw_fast_ns;  in perf_event_set_clock()
12118 		event->clock = &ktime_get_real_ns;  in perf_event_set_clock()
12122 		event->clock = &ktime_get_boottime_ns;  in perf_event_set_clock()
12126 		event->clock = &ktime_get_clocktai_ns;  in perf_event_set_clock()
12133 	if (!nmi_safe && !(event->pmu->capabilities & PERF_PMU_CAP_NO_NMI))  in perf_event_set_clock()
12202  * sys_perf_event_open - open a performance event, associate it to a task/cpu
12207  * @group_fd:		group leader event fd
12208  * @flags:		perf event open flags
12215 	struct perf_event *event, *sibling;  in SYSCALL_DEFINE5()  local
12318 	event = perf_event_alloc(&attr, cpu, task, group_leader, NULL,  in SYSCALL_DEFINE5()
12320 	if (IS_ERR(event)) {  in SYSCALL_DEFINE5()
12321 		err = PTR_ERR(event);  in SYSCALL_DEFINE5()
12325 	if (is_sampling_event(event)) {  in SYSCALL_DEFINE5()
12326 		if (event->pmu->capabilities & PERF_PMU_CAP_NO_INTERRUPT) {  in SYSCALL_DEFINE5()
12336 	pmu = event->pmu;  in SYSCALL_DEFINE5()
12339 		err = perf_event_set_clock(event, attr.clockid);  in SYSCALL_DEFINE5()
12345 		event->event_caps |= PERF_EV_CAP_SOFTWARE;  in SYSCALL_DEFINE5()
12348 		if (is_software_event(event) &&  in SYSCALL_DEFINE5()
12351 			 * If the event is a sw event, but the group_leader  in SYSCALL_DEFINE5()
12359 		} else if (!is_software_event(event) &&  in SYSCALL_DEFINE5()
12364 			 * try to add a hardware event, move the whole group to  in SYSCALL_DEFINE5()
12374 	ctx = find_get_context(pmu, task, event);  in SYSCALL_DEFINE5()
12381 	 * Look up the group leader (we will attach this event to it):  in SYSCALL_DEFINE5()
12394 		if (group_leader->clock != event->clock)  in SYSCALL_DEFINE5()
12402 		if (group_leader->cpu != event->cpu)  in SYSCALL_DEFINE5()
12431 		err = perf_event_set_output(event, output_event);  in SYSCALL_DEFINE5()
12436 	event_file = anon_inode_getfile("[perf_event]", &perf_fops, event,  in SYSCALL_DEFINE5()
12451 		 * perf_install_in_context() call for this new event to  in SYSCALL_DEFINE5()
12475 			 * if this new event wound up on the same ctx, if so  in SYSCALL_DEFINE5()
12518 	if (!perf_event_validate_size(event)) {  in SYSCALL_DEFINE5()
12525 		 * Check if the @cpu we're creating an event for is online.  in SYSCALL_DEFINE5()
12539 	if (perf_need_aux_event(event) && !perf_get_aux_event(event, group_leader)) {  in SYSCALL_DEFINE5()
12546 	 * because we need to serialize with concurrent event creation.  in SYSCALL_DEFINE5()
12548 	if (!exclusive_event_installable(event, ctx)) {  in SYSCALL_DEFINE5()
12597 		 * event. What we want here is event in the initial  in SYSCALL_DEFINE5()
12608 	 * perf_install_in_context() which is the point the event is active and  in SYSCALL_DEFINE5()
12611 	perf_event__header_size(event);  in SYSCALL_DEFINE5()
12612 	perf_event__id_header_size(event);  in SYSCALL_DEFINE5()
12614 	event->owner = current;  in SYSCALL_DEFINE5()
12616 	perf_install_in_context(ctx, event, event->cpu);  in SYSCALL_DEFINE5()
12629 	list_add_tail(&event->owner_entry, &current->perf_event_list);  in SYSCALL_DEFINE5()
12634 	 * new event on the sibling_list. This ensures destruction  in SYSCALL_DEFINE5()
12657 	 * and that will take care of freeing the event.  in SYSCALL_DEFINE5()
12660 		free_event(event);  in SYSCALL_DEFINE5()
12677  * @overflow_handler: callback to trigger when we hit the event
12687 	struct perf_event *event;  in perf_event_create_kernel_counter()  local
12697 	event = perf_event_alloc(attr, cpu, task, NULL, NULL,  in perf_event_create_kernel_counter()
12699 	if (IS_ERR(event)) {  in perf_event_create_kernel_counter()
12700 		err = PTR_ERR(event);  in perf_event_create_kernel_counter()
12705 	event->owner = TASK_TOMBSTONE;  in perf_event_create_kernel_counter()
12710 	ctx = find_get_context(event->pmu, task, event);  in perf_event_create_kernel_counter()
12725 		 * Check if the @cpu we're creating an event for is online.  in perf_event_create_kernel_counter()
12738 	if (!exclusive_event_installable(event, ctx)) {  in perf_event_create_kernel_counter()
12743 	perf_install_in_context(ctx, event, event->cpu);  in perf_event_create_kernel_counter()
12747 	return event;  in perf_event_create_kernel_counter()
12754 	free_event(event);  in perf_event_create_kernel_counter()
12764 	struct perf_event *event, *tmp;  in perf_pmu_migrate_context()  local
12775 	list_for_each_entry_safe(event, tmp, &src_ctx->event_list,  in perf_pmu_migrate_context()
12777 		perf_remove_from_context(event, 0);  in perf_pmu_migrate_context()
12778 		unaccount_event_cpu(event, src_cpu);  in perf_pmu_migrate_context()
12780 		list_add(&event->migrate_entry, &events);  in perf_pmu_migrate_context()
12796 	list_for_each_entry_safe(event, tmp, &events, migrate_entry) {  in perf_pmu_migrate_context()
12797 		if (event->group_leader == event)  in perf_pmu_migrate_context()
12800 		list_del(&event->migrate_entry);  in perf_pmu_migrate_context()
12801 		if (event->state >= PERF_EVENT_STATE_OFF)  in perf_pmu_migrate_context()
12802 			event->state = PERF_EVENT_STATE_INACTIVE;  in perf_pmu_migrate_context()
12803 		account_event_cpu(event, dst_cpu);  in perf_pmu_migrate_context()
12804 		perf_install_in_context(dst_ctx, event, dst_cpu);  in perf_pmu_migrate_context()
12812 	list_for_each_entry_safe(event, tmp, &events, migrate_entry) {  in perf_pmu_migrate_context()
12813 		list_del(&event->migrate_entry);  in perf_pmu_migrate_context()
12814 		if (event->state >= PERF_EVENT_STATE_OFF)  in perf_pmu_migrate_context()
12815 			event->state = PERF_EVENT_STATE_INACTIVE;  in perf_pmu_migrate_context()
12816 		account_event_cpu(event, dst_cpu);  in perf_pmu_migrate_context()
12817 		perf_install_in_context(dst_ctx, event, dst_cpu);  in perf_pmu_migrate_context()
12850 perf_event_exit_event(struct perf_event *event, struct perf_event_context *ctx)  in perf_event_exit_event()  argument
12852 	struct perf_event *parent_event = event->parent;  in perf_event_exit_event()
12872 	perf_remove_from_context(event, detach_flags);  in perf_event_exit_event()
12875 	if (event->state > PERF_EVENT_STATE_EXIT)  in perf_event_exit_event()
12876 		perf_event_set_state(event, PERF_EVENT_STATE_EXIT);  in perf_event_exit_event()
12888 		free_event(event);  in perf_event_exit_event()
12896 	perf_event_wakeup(event);  in perf_event_exit_event()
12961  * When a child task exits, feed back event values to parent events.
12968 	struct perf_event *event, *tmp;  in perf_event_exit_task()  local
12972 	list_for_each_entry_safe(event, tmp, &child->perf_event_list,  in perf_event_exit_task()
12974 		list_del_init(&event->owner_entry);  in perf_event_exit_task()
12981 		smp_store_release(&event->owner, NULL);  in perf_event_exit_task()
12997 static void perf_free_event(struct perf_event *event,  in perf_free_event()  argument
13000 	struct perf_event *parent = event->parent;  in perf_free_event()
13006 	list_del_init(&event->child_list);  in perf_free_event()
13012 	perf_group_detach(event);  in perf_free_event()
13013 	list_del_event(event, ctx);  in perf_free_event()
13015 	free_event(event);  in perf_free_event()
13028 	struct perf_event *event, *tmp;  in perf_event_free_task()  local
13049 		list_for_each_entry_safe(event, tmp, &ctx->event_list, event_entry)  in perf_event_free_task()
13050 			perf_free_event(event, ctx);  in perf_event_free_task()
13063 		 * _free_event()'s put_task_struct(event->hw.target) will be a  in perf_event_free_task()
13103 const struct perf_event_attr *perf_event_attrs(struct perf_event *event)  in perf_event_attrs()  argument
13105 	if (!event)  in perf_event_attrs()
13108 	return &event->attr;  in perf_event_attrs()
13112  * Inherit an event from parent task to child task.
13178 	 * Make the child state follow the state of the parent event,  in inherit_event()
13217 	 * Link this into the parent event's child list  in inherit_event()
13226  * Inherits an event group.
13268  * Creates the child task context and tries to inherit the event-group.
13271  * inherited_all set when we 'fail' to inherit an orphaned event; this is
13279 inherit_task_group(struct perf_event *event, struct task_struct *parent,  in inherit_task_group()  argument
13287 	if (!event->attr.inherit ||  in inherit_task_group()
13288 	    (event->attr.inherit_thread && !(clone_flags & CLONE_THREAD)) ||  in inherit_task_group()
13290 	    (event->attr.sigtrap && (clone_flags & CLONE_CLEAR_SIGHAND))) {  in inherit_task_group()
13310 	ret = inherit_group(event, parent, parent_ctx,  in inherit_task_group()
13327 	struct perf_event *event;  in perf_event_init_context()  local
13361 	perf_event_groups_for_each(event, &parent_ctx->pinned_groups) {  in perf_event_init_context()
13362 		ret = inherit_task_group(event, parent, parent_ctx,  in perf_event_init_context()
13378 	perf_event_groups_for_each(event, &parent_ctx->flexible_groups) {  in perf_event_init_context()
13379 		ret = inherit_task_group(event, parent, parent_ctx,  in perf_event_init_context()
13484 	struct perf_event *event;  in __perf_event_exit_context()  local
13488 	list_for_each_entry(event, &ctx->event_list, event_entry)  in __perf_event_exit_context()
13489 		__perf_remove_from_context(event, cpuctx, ctx, (void *)DETACH_GROUP);  in __perf_event_exit_context()