211 static bool is_kernel_event(struct perf_event *event)  in is_kernel_event()  argument
213 	return READ_ONCE(event->owner) == TASK_TOMBSTONE;  in is_kernel_event()
233  *  - removing the last event from a task ctx; this is relatively straight
236  *  - adding the first event to a task ctx; this is tricky because we cannot
247 	struct perf_event *event;  member
255 	struct perf_event *event = efs->event;  in event_function()  local
256 	struct perf_event_context *ctx = event->ctx;  in event_function()
291 	efs->func(event, cpuctx, ctx, efs->data);  in event_function()
298 static void event_function_call(struct perf_event *event, event_f func, void *data)  in event_function_call()  argument
300 	struct perf_event_context *ctx = event->ctx;  in event_function_call()
304 		.event = event,  in event_function_call()
309 	if (!event->parent) {  in event_function_call()
311 		 * If this is a !child event, we must hold ctx::mutex to  in event_function_call()
312 		 * stabilize the event->ctx relation. See  in event_function_call()
319 		cpu_function_call(event->cpu, event_function, &efs);  in event_function_call()
345 	func(event, NULL, ctx, data);  in event_function_call()
355 static void event_function_local(struct perf_event *event, event_f func, void *data)  in event_function_local()  argument
357 	struct perf_event_context *ctx = event->ctx;  in event_function_local()
394 	func(event, cpuctx, ctx, data);  in event_function_local()
447  * perf event paranoia level:
459  * max perf event sample rate
609 static u64 perf_event_time(struct perf_event *event);
618 static inline u64 perf_event_clock(struct perf_event *event)  in perf_event_clock()  argument
620 	return event->clock();  in perf_event_clock()
624  * State based event timekeeping...
626  * The basic idea is to use event->state to determine which (if any) time
631  * Event groups make things a little more complicated, but not terribly so. The
646 __perf_effective_state(struct perf_event *event)  in __perf_effective_state()  argument
648 	struct perf_event *leader = event->group_leader;  in __perf_effective_state()
653 	return event->state;  in __perf_effective_state()
657 __perf_update_times(struct perf_event *event, u64 now, u64 *enabled, u64 *running)  in __perf_update_times()  argument
659 	enum perf_event_state state = __perf_effective_state(event);  in __perf_update_times()
660 	u64 delta = now - event->tstamp;  in __perf_update_times()
662 	*enabled = event->total_time_enabled;  in __perf_update_times()
666 	*running = event->total_time_running;  in __perf_update_times()
671 static void perf_event_update_time(struct perf_event *event)  in perf_event_update_time()  argument
673 	u64 now = perf_event_time(event);  in perf_event_update_time()
675 	__perf_update_times(event, now, &event->total_time_enabled,  in perf_event_update_time()
676 					&event->total_time_running);  in perf_event_update_time()
677 	event->tstamp = now;  in perf_event_update_time()
689 perf_event_set_state(struct perf_event *event, enum perf_event_state state)  in perf_event_set_state()  argument
691 	if (event->state == state)  in perf_event_set_state()
694 	perf_event_update_time(event);  in perf_event_set_state()
699 	if ((event->state < 0) ^ (state < 0))  in perf_event_set_state()
700 		perf_event_update_sibling_time(event);  in perf_event_set_state()
702 	WRITE_ONCE(event->state, state);  in perf_event_set_state()
752 perf_cgroup_match(struct perf_event *event)  in perf_cgroup_match()  argument
756 	/* @event doesn't care about cgroup */  in perf_cgroup_match()
757 	if (!event->cgrp)  in perf_cgroup_match()
765 	 * Cgroup scoping is recursive.  An event enabled for a cgroup is  in perf_cgroup_match()
767 	 * cgroup is a descendant of @event's (the test covers identity  in perf_cgroup_match()
771 				    event->cgrp->css.cgroup);  in perf_cgroup_match()
774 static inline void perf_detach_cgroup(struct perf_event *event)  in perf_detach_cgroup()  argument
776 	css_put(&event->cgrp->css);  in perf_detach_cgroup()
777 	event->cgrp = NULL;  in perf_detach_cgroup()
780 static inline int is_cgroup_event(struct perf_event *event)  in is_cgroup_event()  argument
782 	return event->cgrp != NULL;  in is_cgroup_event()
785 static inline u64 perf_cgroup_event_time(struct perf_event *event)  in perf_cgroup_event_time()  argument
789 	t = per_cpu_ptr(event->cgrp->info, event->cpu);  in perf_cgroup_event_time()
793 static inline u64 perf_cgroup_event_time_now(struct perf_event *event, u64 now)  in perf_cgroup_event_time_now()  argument
797 	t = per_cpu_ptr(event->cgrp->info, event->cpu);  in perf_cgroup_event_time_now()
835 static inline void update_cgrp_time_from_event(struct perf_event *event)  in update_cgrp_time_from_event()  argument
843 	if (!is_cgroup_event(event))  in update_cgrp_time_from_event()
846 	info = this_cpu_ptr(event->cgrp->info);  in update_cgrp_time_from_event()
889 	 * cpuctx->cgrp is set when the first cgroup event enabled,  in perf_cgroup_switch()
890 	 * and is cleared when the last cgroup event disabled.  in perf_cgroup_switch()
922 static int perf_cgroup_ensure_storage(struct perf_event *event,  in perf_cgroup_ensure_storage()  argument
963 static inline int perf_cgroup_connect(int fd, struct perf_event *event,  in perf_cgroup_connect()  argument
982 	ret = perf_cgroup_ensure_storage(event, css);  in perf_cgroup_connect()
987 	event->cgrp = cgrp;  in perf_cgroup_connect()
995 		perf_detach_cgroup(event);  in perf_cgroup_connect()
1004 perf_cgroup_event_enable(struct perf_event *event, struct perf_event_context *ctx)  in perf_cgroup_event_enable()  argument
1008 	if (!is_cgroup_event(event))  in perf_cgroup_event_enable()
1011 	event->pmu_ctx->nr_cgroups++;  in perf_cgroup_event_enable()
1026 perf_cgroup_event_disable(struct perf_event *event, struct perf_event_context *ctx)  in perf_cgroup_event_disable()  argument
1030 	if (!is_cgroup_event(event))  in perf_cgroup_event_disable()
1033 	event->pmu_ctx->nr_cgroups--;  in perf_cgroup_event_disable()
1050 perf_cgroup_match(struct perf_event *event)  in perf_cgroup_match()  argument
1055 static inline void perf_detach_cgroup(struct perf_event *event)  in perf_detach_cgroup()  argument
1058 static inline int is_cgroup_event(struct perf_event *event)  in is_cgroup_event()  argument
1063 static inline void update_cgrp_time_from_event(struct perf_event *event)  in update_cgrp_time_from_event()  argument
1072 static inline int perf_cgroup_connect(pid_t pid, struct perf_event *event,  in perf_cgroup_connect()  argument
1084 static inline u64 perf_cgroup_event_time(struct perf_event *event)  in perf_cgroup_event_time()  argument
1089 static inline u64 perf_cgroup_event_time_now(struct perf_event *event, u64 now)  in perf_cgroup_event_time_now()  argument
1095 perf_cgroup_event_enable(struct perf_event *event, struct perf_event_context *ctx)  in perf_cgroup_event_enable()  argument
1100 perf_cgroup_event_disable(struct perf_event *event, struct perf_event_context *ctx)  in perf_cgroup_event_disable()  argument
1268  * because the sys_perf_event_open() case will install a new event and break
1279  * quiesce the event, after which we can install it in the new location. This
1280  * means that only external vectors (perf_fops, prctl) can perturb the event
1284  * However; because event->ctx can change while we're waiting to acquire
1304 perf_event_ctx_lock_nested(struct perf_event *event, int nesting)  in perf_event_ctx_lock_nested()  argument
1310 	ctx = READ_ONCE(event->ctx);  in perf_event_ctx_lock_nested()
1318 	if (event->ctx != ctx) {  in perf_event_ctx_lock_nested()
1328 perf_event_ctx_lock(struct perf_event *event)  in perf_event_ctx_lock()  argument
1330 	return perf_event_ctx_lock_nested(event, 0);  in perf_event_ctx_lock()
1333 static void perf_event_ctx_unlock(struct perf_event *event,  in perf_event_ctx_unlock()  argument
1359 static u32 perf_event_pid_type(struct perf_event *event, struct task_struct *p,  in perf_event_pid_type()  argument
1366 	if (event->parent)  in perf_event_pid_type()
1367 		event = event->parent;  in perf_event_pid_type()
1369 	nr = __task_pid_nr_ns(p, type, event->ns);  in perf_event_pid_type()
1376 static u32 perf_event_pid(struct perf_event *event, struct task_struct *p)  in perf_event_pid()  argument
1378 	return perf_event_pid_type(event, p, PIDTYPE_TGID);  in perf_event_pid()
1381 static u32 perf_event_tid(struct perf_event *event, struct task_struct *p)  in perf_event_tid()  argument
1383 	return perf_event_pid_type(event, p, PIDTYPE_PID);  in perf_event_tid()
1387  * If we inherit events we want to return the parent event id
1390 static u64 primary_event_id(struct perf_event *event)  in primary_event_id()  argument
1392 	u64 id = event->id;  in primary_event_id()
1394 	if (event->parent)  in primary_event_id()
1395 		id = event->parent->id;  in primary_event_id()
1515 static u64 perf_event_time(struct perf_event *event)  in perf_event_time()  argument
1517 	struct perf_event_context *ctx = event->ctx;  in perf_event_time()
1522 	if (is_cgroup_event(event))  in perf_event_time()
1523 		return perf_cgroup_event_time(event);  in perf_event_time()
1528 static u64 perf_event_time_now(struct perf_event *event, u64 now)  in perf_event_time_now()  argument
1530 	struct perf_event_context *ctx = event->ctx;  in perf_event_time_now()
1535 	if (is_cgroup_event(event))  in perf_event_time_now()
1536 		return perf_cgroup_event_time_now(event, now);  in perf_event_time_now()
1545 static enum event_type_t get_event_type(struct perf_event *event)  in get_event_type()  argument
1547 	struct perf_event_context *ctx = event->ctx;  in get_event_type()
1556 	if (event->group_leader != event)  in get_event_type()
1557 		event = event->group_leader;  in get_event_type()
1559 	event_type = event->attr.pinned ? EVENT_PINNED : EVENT_FLEXIBLE;  in get_event_type()
1567  * Helper function to initialize event group nodes.
1569 static void init_event_group(struct perf_event *event)  in init_event_group()  argument
1571 	RB_CLEAR_NODE(&event->group_node);  in init_event_group()
1572 	event->group_index = 0;  in init_event_group()
1577  * based on event attrs bits.
1580 get_event_groups(struct perf_event *event, struct perf_event_context *ctx)  in get_event_groups()  argument
1582 	if (event->attr.pinned)  in get_event_groups()
1597 static inline struct cgroup *event_cgroup(const struct perf_event *event)  in event_cgroup()  argument
1602 	if (event->cgrp)  in event_cgroup()
1603 		cgroup = event->cgrp->css.cgroup;  in event_cgroup()
1610  * Compare function for event groups;
1705  * Insert @event into @groups' tree; using
1706  *   {@event->cpu, @event->pmu_ctx->pmu, event_cgroup(@event), ++@groups->index}
1711 			 struct perf_event *event)  in perf_event_groups_insert()  argument
1713 	event->group_index = ++groups->index;  in perf_event_groups_insert()
1715 	rb_add(&event->group_node, &groups->tree, __group_less);  in perf_event_groups_insert()
1719  * Helper function to insert event into the pinned or flexible groups.
1722 add_event_to_groups(struct perf_event *event, struct perf_event_context *ctx)  in add_event_to_groups()  argument
1726 	groups = get_event_groups(event, ctx);  in add_event_to_groups()
1727 	perf_event_groups_insert(groups, event);  in add_event_to_groups()
1735 			 struct perf_event *event)  in perf_event_groups_delete()  argument
1737 	WARN_ON_ONCE(RB_EMPTY_NODE(&event->group_node) ||  in perf_event_groups_delete()
1740 	rb_erase(&event->group_node, &groups->tree);  in perf_event_groups_delete()
1741 	init_event_group(event);  in perf_event_groups_delete()
1745  * Helper function to delete event from its groups.
1748 del_event_from_groups(struct perf_event *event, struct perf_event_context *ctx)  in del_event_from_groups()  argument
1752 	groups = get_event_groups(event, ctx);  in del_event_from_groups()
1753 	perf_event_groups_delete(groups, event);  in del_event_from_groups()
1757  * Get the leftmost event in the {cpu,pmu,cgroup} subtree.
1778 perf_event_groups_next(struct perf_event *event, struct pmu *pmu)  in perf_event_groups_next()  argument
1781 		.cpu = event->cpu,  in perf_event_groups_next()
1783 		.cgroup = event_cgroup(event),  in perf_event_groups_next()
1787 	next = rb_next_match(&key, &event->group_node, __group_cmp);  in perf_event_groups_next()
1794 #define perf_event_groups_for_cpu_pmu(event, groups, cpu, pmu)		\  argument
1795 	for (event = perf_event_groups_first(groups, cpu, pmu, NULL);	\
1796 	     event; event = perf_event_groups_next(event, pmu))
1801 #define perf_event_groups_for_each(event, groups)			\  argument
1802 	for (event = rb_entry_safe(rb_first(&((groups)->tree)),		\
1803 				typeof(*event), group_node); event;	\
1804 		event = rb_entry_safe(rb_next(&event->group_node),	\
1805 				typeof(*event), group_node))
1808  * Does the event attribute request inherit with PERF_SAMPLE_READ
1816  * Add an event from the lists for its context.
1820 list_add_event(struct perf_event *event, struct perf_event_context *ctx)  in list_add_event()  argument
1824 	WARN_ON_ONCE(event->attach_state & PERF_ATTACH_CONTEXT);  in list_add_event()
1825 	event->attach_state |= PERF_ATTACH_CONTEXT;  in list_add_event()
1827 	event->tstamp = perf_event_time(event);  in list_add_event()
1830 	 * If we're a stand alone event or group leader, we go to the context  in list_add_event()
1834 	if (event->group_leader == event) {  in list_add_event()
1835 		event->group_caps = event->event_caps;  in list_add_event()
1836 		add_event_to_groups(event, ctx);  in list_add_event()
1839 	list_add_rcu(&event->event_entry, &ctx->event_list);  in list_add_event()
1841 	if (event->hw.flags & PERF_EVENT_FLAG_USER_READ_CNT)  in list_add_event()
1843 	if (event->attr.inherit_stat)  in list_add_event()
1845 	if (has_inherit_and_sample_read(&event->attr))  in list_add_event()
1848 	if (event->state > PERF_EVENT_STATE_OFF)  in list_add_event()
1849 		perf_cgroup_event_enable(event, ctx);  in list_add_event()
1852 	event->pmu_ctx->nr_events++;  in list_add_event()
1856  * Initialize event state based on the perf_event_attr::disabled.
1858 static inline void perf_event__state_init(struct perf_event *event)  in perf_event__state_init()  argument
1860 	event->state = event->attr.disabled ? PERF_EVENT_STATE_OFF :  in perf_event__state_init()
1894 static void __perf_event_header_size(struct perf_event *event, u64 sample_type)  in __perf_event_header_size()  argument
1912 		size += event->read_size;  in __perf_event_header_size()
1932 	event->header_size = size;  in __perf_event_header_size()
1939 static void perf_event__header_size(struct perf_event *event)  in perf_event__header_size()  argument
1941 	event->read_size =  in perf_event__header_size()
1942 		__perf_event_read_size(event->attr.read_format,  in perf_event__header_size()
1943 				       event->group_leader->nr_siblings);  in perf_event__header_size()
1944 	__perf_event_header_size(event, event->attr.sample_type);  in perf_event__header_size()
1947 static void perf_event__id_header_size(struct perf_event *event)  in perf_event__id_header_size()  argument
1950 	u64 sample_type = event->attr.sample_type;  in perf_event__id_header_size()
1971 	event->id_header_size = size;  in perf_event__id_header_size()
1975  * Check that adding an event to the group does not result in anybody
1976  * overflowing the 64k event limit imposed by the output buffer.
1978  * Specifically, check that the read_size for the event does not exceed 16k,
1980  * depends on per-event read_format, also (re)check the existing events.
1985 static bool perf_event_validate_size(struct perf_event *event)  in perf_event_validate_size()  argument
1987 	struct perf_event *sibling, *group_leader = event->group_leader;  in perf_event_validate_size()
1989 	if (__perf_event_read_size(event->attr.read_format,  in perf_event_validate_size()
2004 	if (event == group_leader)  in perf_event_validate_size()
2016 static void perf_group_attach(struct perf_event *event)  in perf_group_attach()  argument
2018 	struct perf_event *group_leader = event->group_leader, *pos;  in perf_group_attach()
2020 	lockdep_assert_held(&event->ctx->lock);  in perf_group_attach()
2026 	if (event->attach_state & PERF_ATTACH_GROUP)  in perf_group_attach()
2029 	event->attach_state |= PERF_ATTACH_GROUP;  in perf_group_attach()
2031 	if (group_leader == event)  in perf_group_attach()
2034 	WARN_ON_ONCE(group_leader->ctx != event->ctx);  in perf_group_attach()
2036 	group_leader->group_caps &= event->event_caps;  in perf_group_attach()
2038 	list_add_tail(&event->sibling_list, &group_leader->sibling_list);  in perf_group_attach()
2049  * Remove an event from the lists for its context.
2053 list_del_event(struct perf_event *event, struct perf_event_context *ctx)  in list_del_event()  argument
2055 	WARN_ON_ONCE(event->ctx != ctx);  in list_del_event()
2061 	if (!(event->attach_state & PERF_ATTACH_CONTEXT))  in list_del_event()
2064 	event->attach_state &= ~PERF_ATTACH_CONTEXT;  in list_del_event()
2067 	if (event->hw.flags & PERF_EVENT_FLAG_USER_READ_CNT)  in list_del_event()
2069 	if (event->attr.inherit_stat)  in list_del_event()
2071 	if (has_inherit_and_sample_read(&event->attr))  in list_del_event()
2074 	list_del_rcu(&event->event_entry);  in list_del_event()
2076 	if (event->group_leader == event)  in list_del_event()
2077 		del_event_from_groups(event, ctx);  in list_del_event()
2080 	 * If event was in error state, then keep it  in list_del_event()
2084 	 * of the event  in list_del_event()
2086 	if (event->state > PERF_EVENT_STATE_OFF) {  in list_del_event()
2087 		perf_cgroup_event_disable(event, ctx);  in list_del_event()
2088 		perf_event_set_state(event, PERF_EVENT_STATE_OFF);  in list_del_event()
2092 	event->pmu_ctx->nr_events--;  in list_del_event()
2096 perf_aux_output_match(struct perf_event *event, struct perf_event *aux_event)  in perf_aux_output_match()  argument
2101 	if (!event->pmu->aux_output_match)  in perf_aux_output_match()
2104 	return event->pmu->aux_output_match(aux_event);  in perf_aux_output_match()
2107 static void put_event(struct perf_event *event);
2108 static void event_sched_out(struct perf_event *event,
2111 static void perf_put_aux_event(struct perf_event *event)  in perf_put_aux_event()  argument
2113 	struct perf_event_context *ctx = event->ctx;  in perf_put_aux_event()
2117 	 * If event uses aux_event tear down the link  in perf_put_aux_event()
2119 	if (event->aux_event) {  in perf_put_aux_event()
2120 		iter = event->aux_event;  in perf_put_aux_event()
2121 		event->aux_event = NULL;  in perf_put_aux_event()
2127 	 * If the event is an aux_event, tear down all links to  in perf_put_aux_event()
2130 	for_each_sibling_event(iter, event->group_leader) {  in perf_put_aux_event()
2131 		if (iter->aux_event != event)  in perf_put_aux_event()
2135 		put_event(event);  in perf_put_aux_event()
2143 		perf_event_set_state(event, PERF_EVENT_STATE_ERROR);  in perf_put_aux_event()
2147 static bool perf_need_aux_event(struct perf_event *event)  in perf_need_aux_event()  argument
2149 	return !!event->attr.aux_output || !!event->attr.aux_sample_size;  in perf_need_aux_event()
2152 static int perf_get_aux_event(struct perf_event *event,  in perf_get_aux_event()  argument
2156 	 * Our group leader must be an aux event if we want to be  in perf_get_aux_event()
2157 	 * an aux_output. This way, the aux event will precede its  in perf_get_aux_event()
2167 	if (event->attr.aux_output && event->attr.aux_sample_size)  in perf_get_aux_event()
2170 	if (event->attr.aux_output &&  in perf_get_aux_event()
2171 	    !perf_aux_output_match(event, group_leader))  in perf_get_aux_event()
2174 	if (event->attr.aux_sample_size && !group_leader->pmu->snapshot_aux)  in perf_get_aux_event()
2181 	 * Link aux_outputs to their aux event; this is undone in  in perf_get_aux_event()
2186 	event->aux_event = group_leader;  in perf_get_aux_event()
2191 static inline struct list_head *get_event_list(struct perf_event *event)  in get_event_list()  argument
2193 	return event->attr.pinned ? &event->pmu_ctx->pinned_active :  in get_event_list()
2194 				    &event->pmu_ctx->flexible_active;  in get_event_list()
2203 static inline void perf_remove_sibling_event(struct perf_event *event)  in perf_remove_sibling_event()  argument
2205 	event_sched_out(event, event->ctx);  in perf_remove_sibling_event()
2206 	perf_event_set_state(event, PERF_EVENT_STATE_ERROR);  in perf_remove_sibling_event()
2209 static void perf_group_detach(struct perf_event *event)  in perf_group_detach()  argument
2211 	struct perf_event *leader = event->group_leader;  in perf_group_detach()
2213 	struct perf_event_context *ctx = event->ctx;  in perf_group_detach()
2220 	if (!(event->attach_state & PERF_ATTACH_GROUP))  in perf_group_detach()
2223 	event->attach_state &= ~PERF_ATTACH_GROUP;  in perf_group_detach()
2225 	perf_put_aux_event(event);  in perf_group_detach()
2230 	if (leader != event) {  in perf_group_detach()
2231 		list_del_init(&event->sibling_list);  in perf_group_detach()
2232 		event->group_leader->nr_siblings--;  in perf_group_detach()
2233 		event->group_leader->group_generation++;  in perf_group_detach()
2238 	 * If this was a group event with sibling events then  in perf_group_detach()
2242 	list_for_each_entry_safe(sibling, tmp, &event->sibling_list, sibling_list) {  in perf_group_detach()
2251 		sibling->group_caps = event->group_caps;  in perf_group_detach()
2254 			add_event_to_groups(sibling, event->ctx);  in perf_group_detach()
2260 		WARN_ON_ONCE(sibling->ctx != event->ctx);  in perf_group_detach()
2272 static void perf_child_detach(struct perf_event *event)  in perf_child_detach()  argument
2274 	struct perf_event *parent_event = event->parent;  in perf_child_detach()
2276 	if (!(event->attach_state & PERF_ATTACH_CHILD))  in perf_child_detach()
2279 	event->attach_state &= ~PERF_ATTACH_CHILD;  in perf_child_detach()
2286 	sync_child_event(event);  in perf_child_detach()
2287 	list_del_init(&event->child_list);  in perf_child_detach()
2290 static bool is_orphaned_event(struct perf_event *event)  in is_orphaned_event()  argument
2292 	return event->state == PERF_EVENT_STATE_DEAD;  in is_orphaned_event()
2296 event_filter_match(struct perf_event *event)  in event_filter_match()  argument
2298 	return (event->cpu == -1 || event->cpu == smp_processor_id()) &&  in event_filter_match()
2299 	       perf_cgroup_match(event);  in event_filter_match()
2303 event_sched_out(struct perf_event *event, struct perf_event_context *ctx)  in event_sched_out()  argument
2305 	struct perf_event_pmu_context *epc = event->pmu_ctx;  in event_sched_out()
2311 	WARN_ON_ONCE(event->ctx != ctx);  in event_sched_out()
2314 	if (event->state != PERF_EVENT_STATE_ACTIVE)  in event_sched_out()
2322 	list_del_init(&event->active_list);  in event_sched_out()
2324 	perf_pmu_disable(event->pmu);  in event_sched_out()
2326 	event->pmu->del(event, 0);  in event_sched_out()
2327 	event->oncpu = -1;  in event_sched_out()
2329 	if (event->pending_disable) {  in event_sched_out()
2330 		event->pending_disable = 0;  in event_sched_out()
2331 		perf_cgroup_event_disable(event, ctx);  in event_sched_out()
2335 	perf_event_set_state(event, state);  in event_sched_out()
2337 	if (!is_software_event(event))  in event_sched_out()
2339 	if (event->attr.freq && event->attr.sample_freq) {  in event_sched_out()
2343 	if (event->attr.exclusive || !cpc->active_oncpu)  in event_sched_out()
2346 	perf_pmu_enable(event->pmu);  in event_sched_out()
2352 	struct perf_event *event;  in group_sched_out()  local
2364 	for_each_sibling_event(event, group_event)  in group_sched_out()
2365 		event_sched_out(event, ctx);  in group_sched_out()
2397 ctx_time_update_event(struct perf_event_context *ctx, struct perf_event *event)  in ctx_time_update_event()  argument
2403 		update_cgrp_time_from_event(event);  in ctx_time_update_event()
2412  * Cross CPU call to remove a performance event
2414  * We disable the event on the hardware level first. After that we
2418 __perf_remove_from_context(struct perf_event *event,  in __perf_remove_from_context()  argument
2423 	struct perf_event_pmu_context *pmu_ctx = event->pmu_ctx;  in __perf_remove_from_context()
2433 		event->pending_disable = 1;  in __perf_remove_from_context()
2434 	event_sched_out(event, ctx);  in __perf_remove_from_context()
2436 		perf_group_detach(event);  in __perf_remove_from_context()
2438 		perf_child_detach(event);  in __perf_remove_from_context()
2439 	list_del_event(event, ctx);  in __perf_remove_from_context()
2441 		event->state = PERF_EVENT_STATE_DEAD;  in __perf_remove_from_context()
2468  * Remove the event from a task's (or a CPU's) list of events.
2470  * If event->ctx is a cloned context, callers must make sure that
2471  * every task struct that event->ctx->task could possibly point to
2477 static void perf_remove_from_context(struct perf_event *event, unsigned long flags)  in perf_remove_from_context()  argument
2479 	struct perf_event_context *ctx = event->ctx;  in perf_remove_from_context()
2490 		__perf_remove_from_context(event, this_cpu_ptr(&perf_cpu_context),  in perf_remove_from_context()
2497 	event_function_call(event, __perf_remove_from_context, (void *)flags);  in perf_remove_from_context()
2501  * Cross CPU call to disable a performance event
2503 static void __perf_event_disable(struct perf_event *event,  in __perf_event_disable()  argument
2508 	if (event->state < PERF_EVENT_STATE_INACTIVE)  in __perf_event_disable()
2511 	perf_pmu_disable(event->pmu_ctx->pmu);  in __perf_event_disable()
2512 	ctx_time_update_event(ctx, event);  in __perf_event_disable()
2514 	if (event == event->group_leader)  in __perf_event_disable()
2515 		group_sched_out(event, ctx);  in __perf_event_disable()
2517 		event_sched_out(event, ctx);  in __perf_event_disable()
2519 	perf_event_set_state(event, PERF_EVENT_STATE_OFF);  in __perf_event_disable()
2520 	perf_cgroup_event_disable(event, ctx);  in __perf_event_disable()
2522 	perf_pmu_enable(event->pmu_ctx->pmu);  in __perf_event_disable()
2526  * Disable an event.
2528  * If event->ctx is a cloned context, callers must make sure that
2529  * every task struct that event->ctx->task could possibly point to
2532  * hold the top-level event's child_mutex, so any descendant that
2535  * When called from perf_pending_disable it's OK because event->ctx
2539 static void _perf_event_disable(struct perf_event *event)  in _perf_event_disable()  argument
2541 	struct perf_event_context *ctx = event->ctx;  in _perf_event_disable()
2544 	if (event->state <= PERF_EVENT_STATE_OFF) {  in _perf_event_disable()
2550 	event_function_call(event, __perf_event_disable, NULL);  in _perf_event_disable()
2553 void perf_event_disable_local(struct perf_event *event)  in perf_event_disable_local()  argument
2555 	event_function_local(event, __perf_event_disable, NULL);  in perf_event_disable_local()
2562 void perf_event_disable(struct perf_event *event)  in perf_event_disable()  argument
2566 	ctx = perf_event_ctx_lock(event);  in perf_event_disable()
2567 	_perf_event_disable(event);  in perf_event_disable()
2568 	perf_event_ctx_unlock(event, ctx);  in perf_event_disable()
2572 void perf_event_disable_inatomic(struct perf_event *event)  in perf_event_disable_inatomic()  argument
2574 	event->pending_disable = 1;  in perf_event_disable_inatomic()
2575 	irq_work_queue(&event->pending_disable_irq);  in perf_event_disable_inatomic()
2580 static void perf_log_throttle(struct perf_event *event, int enable);
2581 static void perf_log_itrace_start(struct perf_event *event);
2584 event_sched_in(struct perf_event *event, struct perf_event_context *ctx)  in event_sched_in()  argument
2586 	struct perf_event_pmu_context *epc = event->pmu_ctx;  in event_sched_in()
2590 	WARN_ON_ONCE(event->ctx != ctx);  in event_sched_in()
2594 	if (event->state <= PERF_EVENT_STATE_OFF)  in event_sched_in()
2597 	WRITE_ONCE(event->oncpu, smp_processor_id());  in event_sched_in()
2599 	 * Order event::oncpu write to happen before the ACTIVE state is  in event_sched_in()
2604 	perf_event_set_state(event, PERF_EVENT_STATE_ACTIVE);  in event_sched_in()
2611 	if (unlikely(event->hw.interrupts == MAX_INTERRUPTS)) {  in event_sched_in()
2612 		perf_log_throttle(event, 1);  in event_sched_in()
2613 		event->hw.interrupts = 0;  in event_sched_in()
2616 	perf_pmu_disable(event->pmu);  in event_sched_in()
2618 	perf_log_itrace_start(event);  in event_sched_in()
2620 	if (event->pmu->add(event, PERF_EF_START)) {  in event_sched_in()
2621 		perf_event_set_state(event, PERF_EVENT_STATE_INACTIVE);  in event_sched_in()
2622 		event->oncpu = -1;  in event_sched_in()
2627 	if (!is_software_event(event))  in event_sched_in()
2629 	if (event->attr.freq && event->attr.sample_freq) {  in event_sched_in()
2633 	if (event->attr.exclusive)  in event_sched_in()
2637 	perf_pmu_enable(event->pmu);  in event_sched_in()
2645 	struct perf_event *event, *partial_group = NULL;  in group_sched_in()  local
2659 	for_each_sibling_event(event, group_event) {  in group_sched_in()
2660 		if (event_sched_in(event, ctx)) {  in group_sched_in()
2661 			partial_group = event;  in group_sched_in()
2673 	 * The events up to the failed event are scheduled out normally.  in group_sched_in()
2675 	for_each_sibling_event(event, group_event) {  in group_sched_in()
2676 		if (event == partial_group)  in group_sched_in()
2679 		event_sched_out(event, ctx);  in group_sched_in()
2689  * Work out whether we can put this event group on the CPU now.
2691 static int group_can_go_on(struct perf_event *event, int can_add_hw)  in group_can_go_on()  argument
2693 	struct perf_event_pmu_context *epc = event->pmu_ctx;  in group_can_go_on()
2699 	if (event->group_caps & PERF_EV_CAP_SOFTWARE)  in group_can_go_on()
2711 	if (event->attr.exclusive && !list_empty(get_event_list(event)))  in group_can_go_on()
2720 static void add_event_to_ctx(struct perf_event *event,  in add_event_to_ctx()  argument
2723 	list_add_event(event, ctx);  in add_event_to_ctx()
2724 	perf_group_attach(event);  in add_event_to_ctx()
2762  * time an event is added, only do it for the groups of equal priority and
2829  * Cross CPU call to install and enable a performance event
2836 	struct perf_event *event = info;  in __perf_install_in_context()  local
2837 	struct perf_event_context *ctx = event->ctx;  in __perf_install_in_context()
2868 	if (event->state > PERF_EVENT_STATE_OFF && is_cgroup_event(event)) {  in __perf_install_in_context()
2870 		 * If the current cgroup doesn't match the event's  in __perf_install_in_context()
2875 					event->cgrp->css.cgroup);  in __perf_install_in_context()
2881 		add_event_to_ctx(event, ctx);  in __perf_install_in_context()
2882 		ctx_resched(cpuctx, task_ctx, event->pmu_ctx->pmu,  in __perf_install_in_context()
2883 			    get_event_type(event));  in __perf_install_in_context()
2885 		add_event_to_ctx(event, ctx);  in __perf_install_in_context()
2894 static bool exclusive_event_installable(struct perf_event *event,
2898  * Attach a performance event to a context.
2904 			struct perf_event *event,  in perf_install_in_context()  argument
2911 	WARN_ON_ONCE(!exclusive_event_installable(event, ctx));  in perf_install_in_context()
2913 	if (event->cpu != -1)  in perf_install_in_context()
2914 		WARN_ON_ONCE(event->cpu != cpu);  in perf_install_in_context()
2917 	 * Ensures that if we can observe event->ctx, both the event and ctx  in perf_install_in_context()
2920 	smp_store_release(&event->ctx, ctx);  in perf_install_in_context()
2924 	 * without IPI. Except when this is the first event for the context, in  in perf_install_in_context()
2928 	 * event will issue the IPI and reprogram the hardware.  in perf_install_in_context()
2930 	if (__perf_effective_state(event) == PERF_EVENT_STATE_OFF &&  in perf_install_in_context()
2931 	    ctx->nr_events && !is_cgroup_event(event)) {  in perf_install_in_context()
2937 		add_event_to_ctx(event, ctx);  in perf_install_in_context()
2943 		cpu_function_call(cpu, __perf_install_in_context, event);  in perf_install_in_context()
2985 	if (!task_function_call(task, __perf_install_in_context, event))  in perf_install_in_context()
3001 	 * thus we can safely install the event.  in perf_install_in_context()
3007 	add_event_to_ctx(event, ctx);  in perf_install_in_context()
3012  * Cross CPU call to enable a performance event
3014 static void __perf_event_enable(struct perf_event *event,  in __perf_event_enable()  argument
3019 	struct perf_event *leader = event->group_leader;  in __perf_event_enable()
3022 	if (event->state >= PERF_EVENT_STATE_INACTIVE ||  in __perf_event_enable()
3023 	    event->state <= PERF_EVENT_STATE_ERROR)  in __perf_event_enable()
3028 	perf_event_set_state(event, PERF_EVENT_STATE_INACTIVE);  in __perf_event_enable()
3029 	perf_cgroup_event_enable(event, ctx);  in __perf_event_enable()
3034 	if (!event_filter_match(event))  in __perf_event_enable()
3038 	 * If the event is in a group and isn't the group leader,  in __perf_event_enable()
3041 	if (leader != event && leader->state != PERF_EVENT_STATE_ACTIVE)  in __perf_event_enable()
3048 	ctx_resched(cpuctx, task_ctx, event->pmu_ctx->pmu, get_event_type(event));  in __perf_event_enable()
3052  * Enable an event.
3054  * If event->ctx is a cloned context, callers must make sure that
3055  * every task struct that event->ctx->task could possibly point to
3060 static void _perf_event_enable(struct perf_event *event)  in _perf_event_enable()  argument
3062 	struct perf_event_context *ctx = event->ctx;  in _perf_event_enable()
3065 	if (event->state >= PERF_EVENT_STATE_INACTIVE ||  in _perf_event_enable()
3066 	    event->state <  PERF_EVENT_STATE_ERROR) {  in _perf_event_enable()
3073 	 * If the event is in error state, clear that first.  in _perf_event_enable()
3075 	 * That way, if we see the event in error state below, we know that it  in _perf_event_enable()
3079 	if (event->state == PERF_EVENT_STATE_ERROR) {  in _perf_event_enable()
3083 		if (event->event_caps & PERF_EV_CAP_SIBLING &&  in _perf_event_enable()
3084 		    event->group_leader == event)  in _perf_event_enable()
3087 		event->state = PERF_EVENT_STATE_OFF;  in _perf_event_enable()
3091 	event_function_call(event, __perf_event_enable, NULL);  in _perf_event_enable()
3097 void perf_event_enable(struct perf_event *event)  in perf_event_enable()  argument
3101 	ctx = perf_event_ctx_lock(event);  in perf_event_enable()
3102 	_perf_event_enable(event);  in perf_event_enable()
3103 	perf_event_ctx_unlock(event, ctx);  in perf_event_enable()
3108 	struct perf_event	*event;  member
3115 	struct perf_event *event = sd->event;  in __perf_event_stop()  local
3118 	if (READ_ONCE(event->state) != PERF_EVENT_STATE_ACTIVE)  in __perf_event_stop()
3126 	 * so we need to check again lest we try to stop another CPU's event.  in __perf_event_stop()
3128 	if (READ_ONCE(event->oncpu) != smp_processor_id())  in __perf_event_stop()
3131 	event->pmu->stop(event, PERF_EF_UPDATE);  in __perf_event_stop()
3139 	 * Since this is happening on an event-local CPU, no trace is lost  in __perf_event_stop()
3143 		event->pmu->start(event, 0);  in __perf_event_stop()
3148 static int perf_event_stop(struct perf_event *event, int restart)  in perf_event_stop()  argument
3151 		.event		= event,  in perf_event_stop()
3157 		if (READ_ONCE(event->state) != PERF_EVENT_STATE_ACTIVE)  in perf_event_stop()
3164 		 * We only want to restart ACTIVE events, so if the event goes  in perf_event_stop()
3165 		 * inactive here (event->oncpu==-1), there's nothing more to do;  in perf_event_stop()
3168 		ret = cpu_function_call(READ_ONCE(event->oncpu),  in perf_event_stop()
3181  *	event::addr_filter_ranges array and bump the event::addr_filters_gen;
3182  * (p2) when an event is scheduled in (pmu::add), it calls
3186  * If (p1) happens while the event is active, we restart it to force (p2).
3197 void perf_event_addr_filters_sync(struct perf_event *event)  in perf_event_addr_filters_sync()  argument
3199 	struct perf_addr_filters_head *ifh = perf_event_addr_filters(event);  in perf_event_addr_filters_sync()
3201 	if (!has_addr_filter(event))  in perf_event_addr_filters_sync()
3205 	if (event->addr_filters_gen != event->hw.addr_filters_gen) {  in perf_event_addr_filters_sync()
3206 		event->pmu->addr_filters_sync(event);  in perf_event_addr_filters_sync()
3207 		event->hw.addr_filters_gen = event->addr_filters_gen;  in perf_event_addr_filters_sync()
3213 static int _perf_event_refresh(struct perf_event *event, int refresh)  in _perf_event_refresh()  argument
3218 	if (event->attr.inherit || !is_sampling_event(event))  in _perf_event_refresh()
3221 	atomic_add(refresh, &event->event_limit);  in _perf_event_refresh()
3222 	_perf_event_enable(event);  in _perf_event_refresh()
3230 int perf_event_refresh(struct perf_event *event, int refresh)  in perf_event_refresh()  argument
3235 	ctx = perf_event_ctx_lock(event);  in perf_event_refresh()
3236 	ret = _perf_event_refresh(event, refresh);  in perf_event_refresh()
3237 	perf_event_ctx_unlock(event, ctx);  in perf_event_refresh()
3259  * Copy event-type-independent attributes that may be modified.
3267 static int perf_event_modify_attr(struct perf_event *event,  in perf_event_modify_attr()  argument
3274 	if (event->attr.type != attr->type)  in perf_event_modify_attr()
3277 	switch (event->attr.type) {  in perf_event_modify_attr()
3286 	WARN_ON_ONCE(event->ctx->parent_ctx);  in perf_event_modify_attr()
3288 	mutex_lock(&event->child_mutex);  in perf_event_modify_attr()
3290 	 * Event-type-independent attributes must be copied before event-type  in perf_event_modify_attr()
3294 	perf_event_modify_copy_attr(&event->attr, attr);  in perf_event_modify_attr()
3295 	err = func(event, attr);  in perf_event_modify_attr()
3298 	list_for_each_entry(child, &event->child_list, child_list) {  in perf_event_modify_attr()
3305 	mutex_unlock(&event->child_mutex);  in perf_event_modify_attr()
3313 	struct perf_event *event, *tmp;  in __pmu_ctx_sched_out()  local
3329 		list_for_each_entry_safe(event, tmp,  in __pmu_ctx_sched_out()
3332 			group_sched_out(event, ctx);  in __pmu_ctx_sched_out()
3336 		list_for_each_entry_safe(event, tmp,  in __pmu_ctx_sched_out()
3339 			group_sched_out(event, ctx);  in __pmu_ctx_sched_out()
3461 static void __perf_event_sync_stat(struct perf_event *event,  in __perf_event_sync_stat()  argument
3466 	if (!event->attr.inherit_stat)  in __perf_event_sync_stat()
3470 	 * Update the event value, we cannot use perf_event_read()  in __perf_event_sync_stat()
3473 	 * we know the event must be on the current CPU, therefore we  in __perf_event_sync_stat()
3476 	if (event->state == PERF_EVENT_STATE_ACTIVE)  in __perf_event_sync_stat()
3477 		event->pmu->read(event);  in __perf_event_sync_stat()
3479 	perf_event_update_time(event);  in __perf_event_sync_stat()
3482 	 * In order to keep per-task stats reliable we need to flip the event  in __perf_event_sync_stat()
3486 	value = local64_xchg(&event->count, value);  in __perf_event_sync_stat()
3489 	swap(event->total_time_enabled, next_event->total_time_enabled);  in __perf_event_sync_stat()
3490 	swap(event->total_time_running, next_event->total_time_running);  in __perf_event_sync_stat()
3495 	perf_event_update_userpage(event);  in __perf_event_sync_stat()
3502 	struct perf_event *event, *next_event;  in perf_event_sync_stat()  local
3509 	event = list_first_entry(&ctx->event_list,  in perf_event_sync_stat()
3515 	while (&event->event_entry != &ctx->event_list &&  in perf_event_sync_stat()
3518 		__perf_event_sync_stat(event, next_event);  in perf_event_sync_stat()
3520 		event = list_next_entry(event, event_entry);  in perf_event_sync_stat()
3701  * This callback is relevant even to per-cpu events; for example multi event
3747  * We stop each event and update the event value in event->count.
3750  * sets the disabled bit in the control field of event _before_
3751  * accessing the event control register. If a NMI hits, then it will
3752  * not restart the event.
3768 	 * cgroup event are system-wide mode only  in __perf_event_task_sched_out()
3795 static void __heap_add(struct perf_event_min_heap *heap, struct perf_event *event)  in __heap_add()  argument
3799 	if (event) {  in __heap_add()
3800 		itrs[heap->nr] = event;  in __heap_add()
3827 	/* Space for per CPU and/or any CPU event iterators. */  in visit_groups_merge()
3891  * Because the userpage is strictly per-event (there is no concept of context,
3897 static inline bool event_update_userpage(struct perf_event *event)  in event_update_userpage()  argument
3899 	if (likely(!atomic_read(&event->mmap_count)))  in event_update_userpage()
3902 	perf_event_update_time(event);  in event_update_userpage()
3903 	perf_event_update_userpage(event);  in event_update_userpage()
3910 	struct perf_event *event;  in group_update_userpage()  local
3915 	for_each_sibling_event(event, group_event)  in group_update_userpage()
3916 		event_update_userpage(event);  in group_update_userpage()
3919 static int merge_sched_in(struct perf_event *event, void *data)  in merge_sched_in()  argument
3921 	struct perf_event_context *ctx = event->ctx;  in merge_sched_in()
3924 	if (event->state <= PERF_EVENT_STATE_OFF)  in merge_sched_in()
3927 	if (!event_filter_match(event))  in merge_sched_in()
3930 	if (group_can_go_on(event, *can_add_hw)) {  in merge_sched_in()
3931 		if (!group_sched_in(event, ctx))  in merge_sched_in()
3932 			list_add_tail(&event->active_list, get_event_list(event));  in merge_sched_in()
3935 	if (event->state == PERF_EVENT_STATE_INACTIVE) {  in merge_sched_in()
3937 		if (event->attr.pinned) {  in merge_sched_in()
3938 			perf_cgroup_event_disable(event, ctx);  in merge_sched_in()
3939 			perf_event_set_state(event, PERF_EVENT_STATE_ERROR);  in merge_sched_in()
3943 			event->pmu_ctx->rotate_necessary = 1;  in merge_sched_in()
3944 			cpc = this_cpu_ptr(event->pmu_ctx->pmu->cpu_pmu_context);  in merge_sched_in()
3946 			group_update_userpage(event);  in merge_sched_in()
4087  * We restore the event value and then enable it.
4090  * sets the enabled bit in the control field of event _before_
4091  * accessing the event control register. If a NMI hits, then it will
4092  * keep the event running.
4106 static u64 perf_calculate_period(struct perf_event *event, u64 nsec, u64 count)  in perf_calculate_period()  argument
4108 	u64 frequency = event->attr.sample_freq;  in perf_calculate_period()
4182 static void perf_adjust_period(struct perf_event *event, u64 nsec, u64 count, bool disable)  in perf_adjust_period()  argument
4184 	struct hw_perf_event *hwc = &event->hw;  in perf_adjust_period()
4188 	period = perf_calculate_period(event, nsec, count);  in perf_adjust_period()
4206 			event->pmu->stop(event, PERF_EF_UPDATE);  in perf_adjust_period()
4211 			event->pmu->start(event, PERF_EF_RELOAD);  in perf_adjust_period()
4217 	struct perf_event *event;  in perf_adjust_freq_unthr_events()  local
4222 	list_for_each_entry(event, event_list, active_list) {  in perf_adjust_freq_unthr_events()
4223 		if (event->state != PERF_EVENT_STATE_ACTIVE)  in perf_adjust_freq_unthr_events()
4227 		if (!event_filter_match(event))  in perf_adjust_freq_unthr_events()
4230 		hwc = &event->hw;  in perf_adjust_freq_unthr_events()
4234 			perf_log_throttle(event, 1);  in perf_adjust_freq_unthr_events()
4235 			if (!event->attr.freq || !event->attr.sample_freq)  in perf_adjust_freq_unthr_events()
4236 				event->pmu->start(event, 0);  in perf_adjust_freq_unthr_events()
4239 		if (!event->attr.freq || !event->attr.sample_freq)  in perf_adjust_freq_unthr_events()
4243 		 * stop the event and update event->count  in perf_adjust_freq_unthr_events()
4245 		event->pmu->stop(event, PERF_EF_UPDATE);  in perf_adjust_freq_unthr_events()
4247 		now = local64_read(&event->count);  in perf_adjust_freq_unthr_events()
4252 		 * restart the event  in perf_adjust_freq_unthr_events()
4254 		 * we have stopped the event so tell that  in perf_adjust_freq_unthr_events()
4259 			perf_adjust_period(event, period, delta, false);  in perf_adjust_freq_unthr_events()
4261 		event->pmu->start(event, delta > 0 ? PERF_EF_RELOAD : 0);  in perf_adjust_freq_unthr_events()
4303  * Move @event to the tail of the @ctx's elegible events.
4305 static void rotate_ctx(struct perf_event_context *ctx, struct perf_event *event)  in rotate_ctx()  argument
4314 	perf_event_groups_delete(&ctx->flexible_groups, event);  in rotate_ctx()
4315 	perf_event_groups_insert(&ctx->flexible_groups, event);  in rotate_ctx()
4318 /* pick an event from the flexible_groups to rotate */
4322 	struct perf_event *event;  in ctx_event_to_rotate()  local
4329 	/* pick the first active flexible event */  in ctx_event_to_rotate()
4330 	event = list_first_entry_or_null(&pmu_ctx->flexible_active,  in ctx_event_to_rotate()
4332 	if (event)  in ctx_event_to_rotate()
4335 	/* if no active flexible event, pick the first event */  in ctx_event_to_rotate()
4343 			event = __node_2_pe(node);  in ctx_event_to_rotate()
4350 		event = __node_2_pe(node);  in ctx_event_to_rotate()
4357 		event = __node_2_pe(node);  in ctx_event_to_rotate()
4366 	return event;  in ctx_event_to_rotate()
4379 	 * events, thus the event count values are stable.  in perf_rotate_context()
4449 static int event_enable_on_exec(struct perf_event *event,  in event_enable_on_exec()  argument
4452 	if (!event->attr.enable_on_exec)  in event_enable_on_exec()
4455 	event->attr.enable_on_exec = 0;  in event_enable_on_exec()
4456 	if (event->state >= PERF_EVENT_STATE_INACTIVE)  in event_enable_on_exec()
4459 	perf_event_set_state(event, PERF_EVENT_STATE_INACTIVE);  in event_enable_on_exec()
4473 	struct perf_event *event;  in perf_event_enable_on_exec()  local
4488 	list_for_each_entry(event, &ctx->event_list, event_entry) {  in perf_event_enable_on_exec()
4489 		enabled |= event_enable_on_exec(event, ctx);  in perf_event_enable_on_exec()
4490 		event_type |= get_event_type(event);  in perf_event_enable_on_exec()
4494 	 * Unclone and reschedule this context if we enabled any event.  in perf_event_enable_on_exec()
4509 static void perf_remove_from_owner(struct perf_event *event);
4510 static void perf_event_exit_event(struct perf_event *event,
4520 	struct perf_event *event, *next;  in perf_event_remove_on_exec()  local
4529 	list_for_each_entry_safe(event, next, &ctx->event_list, event_entry) {  in perf_event_remove_on_exec()
4530 		if (!event->attr.remove_on_exec)  in perf_event_remove_on_exec()
4533 		if (!is_kernel_event(event))  in perf_event_remove_on_exec()
4534 			perf_remove_from_owner(event);  in perf_event_remove_on_exec()
4538 		perf_event_exit_event(event, ctx);  in perf_event_remove_on_exec()
4554 	struct perf_event *event;  member
4561 static int __perf_event_read_cpu(struct perf_event *event, int event_cpu)  in __perf_event_read_cpu()  argument
4569 	if (event->group_caps & PERF_EV_CAP_READ_SCOPE) {  in __perf_event_read_cpu()
4570 		const struct cpumask *cpumask = perf_scope_cpu_topology_cpumask(event->pmu->scope, event_cpu);  in __perf_event_read_cpu()
4576 	if (event->group_caps & PERF_EV_CAP_READ_ACTIVE_PKG) {  in __perf_event_read_cpu()
4588  * Cross CPU call to read the hardware event
4593 	struct perf_event *sub, *event = data->event;  in __perf_event_read()  local
4594 	struct perf_event_context *ctx = event->ctx;  in __perf_event_read()
4596 	struct pmu *pmu = event->pmu;  in __perf_event_read()
4602 	 * event->count would have been updated to a recent sample  in __perf_event_read()
4603 	 * when the event was scheduled out.  in __perf_event_read()
4609 	ctx_time_update_event(ctx, event);  in __perf_event_read()
4611 	perf_event_update_time(event);  in __perf_event_read()
4613 		perf_event_update_sibling_time(event);  in __perf_event_read()
4615 	if (event->state != PERF_EVENT_STATE_ACTIVE)  in __perf_event_read()
4619 		pmu->read(event);  in __perf_event_read()
4626 	pmu->read(event);  in __perf_event_read()
4628 	for_each_sibling_event(sub, event) {  in __perf_event_read()
4631 			 * Use sibling's PMU rather than @event's since  in __perf_event_read()
4644 static inline u64 perf_event_count(struct perf_event *event, bool self)  in perf_event_count()  argument
4647 		return local64_read(&event->count);  in perf_event_count()
4649 	return local64_read(&event->count) + atomic64_read(&event->child_count);  in perf_event_count()
4652 static void calc_timer_values(struct perf_event *event,  in calc_timer_values()  argument
4660 	ctx_time = perf_event_time_now(event, *now);  in calc_timer_values()
4661 	__perf_update_times(event, ctx_time, enabled, running);  in calc_timer_values()
4665  * NMI-safe method to read a local event, that is an event that
4672 int perf_event_read_local(struct perf_event *event, u64 *value,  in perf_event_read_local()  argument
4687 	 * It must not be an event with inherit set, we cannot read  in perf_event_read_local()
4690 	if (event->attr.inherit) {  in perf_event_read_local()
4695 	/* If this is a per-task event, it must be for current */  in perf_event_read_local()
4696 	if ((event->attach_state & PERF_ATTACH_TASK) &&  in perf_event_read_local()
4697 	    event->hw.target != current) {  in perf_event_read_local()
4703 	 * Get the event CPU numbers, and adjust them to local if the event is  in perf_event_read_local()
4704 	 * a per-package event that can be read locally  in perf_event_read_local()
4706 	event_oncpu = __perf_event_read_cpu(event, event->oncpu);  in perf_event_read_local()
4707 	event_cpu = __perf_event_read_cpu(event, event->cpu);  in perf_event_read_local()
4709 	/* If this is a per-CPU event, it must be for this CPU */  in perf_event_read_local()
4710 	if (!(event->attach_state & PERF_ATTACH_TASK) &&  in perf_event_read_local()
4716 	/* If this is a pinned event it must be running on this CPU */  in perf_event_read_local()
4717 	if (event->attr.pinned && event_oncpu != smp_processor_id()) {  in perf_event_read_local()
4723 	 * If the event is currently on this CPU, its either a per-task event,  in perf_event_read_local()
4728 		event->pmu->read(event);  in perf_event_read_local()
4730 	*value = local64_read(&event->count);  in perf_event_read_local()
4734 		calc_timer_values(event, &__now, &__enabled, &__running);  in perf_event_read_local()
4746 static int perf_event_read(struct perf_event *event, bool group)  in perf_event_read()  argument
4748 	enum perf_event_state state = READ_ONCE(event->state);  in perf_event_read()
4752 	 * If event is enabled and currently active on a CPU, update the  in perf_event_read()
4753 	 * value in the event structure:  in perf_event_read()
4767 		event_cpu = READ_ONCE(event->oncpu);  in perf_event_read()
4772 			.event = event,  in perf_event_read()
4778 		event_cpu = __perf_event_read_cpu(event, event_cpu);  in perf_event_read()
4784 		 * If event_cpu isn't a valid CPU it means the event got  in perf_event_read()
4785 		 * scheduled out and that will have updated the event count.  in perf_event_read()
4787 		 * Therefore, either way, we'll have an up-to-date event count  in perf_event_read()
4795 		struct perf_event_context *ctx = event->ctx;  in perf_event_read()
4799 		state = event->state;  in perf_event_read()
4809 		ctx_time_update_event(ctx, event);  in perf_event_read()
4811 		perf_event_update_time(event);  in perf_event_read()
4813 			perf_event_update_sibling_time(event);  in perf_event_read()
4884 find_get_context(struct task_struct *task, struct perf_event *event)  in find_get_context()  argument
4892 		/* Must be root to operate on a CPU event: */  in find_get_context()
4893 		err = perf_allow_cpu(&event->attr);  in find_get_context()
4897 		cpuctx = per_cpu_ptr(&perf_cpu_context, event->cpu);  in find_get_context()
4958 		     struct perf_event *event)  in find_get_pmu_context()  argument
4971 		cpc = per_cpu_ptr(pmu->cpu_pmu_context, event->cpu);  in find_get_pmu_context()
4991 	if (event->attach_state & PERF_ATTACH_TASK_DATA) {  in find_get_pmu_context()
5084 static void perf_event_free_filter(struct perf_event *event);
5088 	struct perf_event *event = container_of(head, typeof(*event), rcu_head);  in free_event_rcu()  local
5090 	if (event->ns)  in free_event_rcu()
5091 		put_pid_ns(event->ns);  in free_event_rcu()
5092 	perf_event_free_filter(event);  in free_event_rcu()
5093 	kmem_cache_free(perf_event_cache, event);  in free_event_rcu()
5096 static void ring_buffer_attach(struct perf_event *event,
5099 static void detach_sb_event(struct perf_event *event)  in detach_sb_event()  argument
5101 	struct pmu_event_list *pel = per_cpu_ptr(&pmu_sb_events, event->cpu);  in detach_sb_event()
5104 	list_del_rcu(&event->sb_list);  in detach_sb_event()
5108 static bool is_sb_event(struct perf_event *event)  in is_sb_event()  argument
5110 	struct perf_event_attr *attr = &event->attr;  in is_sb_event()
5112 	if (event->parent)  in is_sb_event()
5115 	if (event->attach_state & PERF_ATTACH_TASK)  in is_sb_event()
5127 static void unaccount_pmu_sb_event(struct perf_event *event)  in unaccount_pmu_sb_event()  argument
5129 	if (is_sb_event(event))  in unaccount_pmu_sb_event()
5130 		detach_sb_event(event);  in unaccount_pmu_sb_event()
5155 static void unaccount_event(struct perf_event *event)  in unaccount_event()  argument
5159 	if (event->parent)  in unaccount_event()
5162 	if (event->attach_state & (PERF_ATTACH_TASK | PERF_ATTACH_SCHED_CB))  in unaccount_event()
5164 	if (event->attr.mmap || event->attr.mmap_data)  in unaccount_event()
5166 	if (event->attr.build_id)  in unaccount_event()
5168 	if (event->attr.comm)  in unaccount_event()
5170 	if (event->attr.namespaces)  in unaccount_event()
5172 	if (event->attr.cgroup)  in unaccount_event()
5174 	if (event->attr.task)  in unaccount_event()
5176 	if (event->attr.freq)  in unaccount_event()
5178 	if (event->attr.context_switch) {  in unaccount_event()
5182 	if (is_cgroup_event(event))  in unaccount_event()
5184 	if (has_branch_stack(event))  in unaccount_event()
5186 	if (event->attr.ksymbol)  in unaccount_event()
5188 	if (event->attr.bpf_event)  in unaccount_event()
5190 	if (event->attr.text_poke)  in unaccount_event()
5198 	unaccount_pmu_sb_event(event);  in unaccount_event()
5211  * (PERF_PMU_CAP_EXCLUSIVE). Such pmus can only have one event scheduled
5221 static int exclusive_event_init(struct perf_event *event)  in exclusive_event_init()  argument
5223 	struct pmu *pmu = event->pmu;  in exclusive_event_init()
5236 	 * Since this is called in perf_event_alloc() path, event::ctx  in exclusive_event_init()
5238 	 * to mean "per-task event", because unlike other attach states it  in exclusive_event_init()
5241 	if (event->attach_state & PERF_ATTACH_TASK) {  in exclusive_event_init()
5252 static void exclusive_event_destroy(struct perf_event *event)  in exclusive_event_destroy()  argument
5254 	struct pmu *pmu = event->pmu;  in exclusive_event_destroy()
5260 	if (event->attach_state & PERF_ATTACH_TASK)  in exclusive_event_destroy()
5276 static bool exclusive_event_installable(struct perf_event *event,  in exclusive_event_installable()  argument
5280 	struct pmu *pmu = event->pmu;  in exclusive_event_installable()
5288 		if (exclusive_event_match(iter_event, event))  in exclusive_event_installable()
5295 static void perf_addr_filters_splice(struct perf_event *event,
5298 static void perf_pending_task_sync(struct perf_event *event)  in perf_pending_task_sync()  argument
5300 	struct callback_head *head = &event->pending_task;  in perf_pending_task_sync()
5302 	if (!event->pending_work)  in perf_pending_task_sync()
5309 		event->pending_work = 0;  in perf_pending_task_sync()
5310 		local_dec(&event->ctx->nr_no_switch_fast);  in perf_pending_task_sync()
5315 	 * All accesses related to the event are within the same RCU section in  in perf_pending_task_sync()
5316 	 * perf_pending_task(). The RCU grace period before the event is freed  in perf_pending_task_sync()
5319 	rcuwait_wait_event(&event->pending_work_wait, !event->pending_work, TASK_UNINTERRUPTIBLE);  in perf_pending_task_sync()
5322 static void _free_event(struct perf_event *event)  in _free_event()  argument
5324 	irq_work_sync(&event->pending_irq);  in _free_event()
5325 	irq_work_sync(&event->pending_disable_irq);  in _free_event()
5326 	perf_pending_task_sync(event);  in _free_event()
5328 	unaccount_event(event);  in _free_event()
5330 	security_perf_event_free(event);  in _free_event()
5332 	if (event->rb) {  in _free_event()
5334 		 * Can happen when we close an event with re-directed output.  in _free_event()
5339 		mutex_lock(&event->mmap_mutex);  in _free_event()
5340 		ring_buffer_attach(event, NULL);  in _free_event()
5341 		mutex_unlock(&event->mmap_mutex);  in _free_event()
5344 	if (is_cgroup_event(event))  in _free_event()
5345 		perf_detach_cgroup(event);  in _free_event()
5347 	if (!event->parent) {  in _free_event()
5348 		if (event->attr.sample_type & PERF_SAMPLE_CALLCHAIN)  in _free_event()
5352 	perf_event_free_bpf_prog(event);  in _free_event()
5353 	perf_addr_filters_splice(event, NULL);  in _free_event()
5354 	kfree(event->addr_filter_ranges);  in _free_event()
5356 	if (event->destroy)  in _free_event()
5357 		event->destroy(event);  in _free_event()
5363 	if (event->hw.target)  in _free_event()
5364 		put_task_struct(event->hw.target);  in _free_event()
5366 	if (event->pmu_ctx)  in _free_event()
5367 		put_pmu_ctx(event->pmu_ctx);  in _free_event()
5373 	if (event->ctx)  in _free_event()
5374 		put_ctx(event->ctx);  in _free_event()
5376 	exclusive_event_destroy(event);  in _free_event()
5377 	module_put(event->pmu->module);  in _free_event()
5379 	call_rcu(&event->rcu_head, free_event_rcu);  in _free_event()
5384  * where the event isn't exposed yet and inherited events.
5386 static void free_event(struct perf_event *event)  in free_event()  argument
5388 	if (WARN(atomic_long_cmpxchg(&event->refcount, 1, 0) != 1,  in free_event()
5389 				"unexpected event refcount: %ld; ptr=%p\n",  in free_event()
5390 				atomic_long_read(&event->refcount), event)) {  in free_event()
5395 	_free_event(event);  in free_event()
5399  * Remove user event from the owner task.
5401 static void perf_remove_from_owner(struct perf_event *event)  in perf_remove_from_owner()  argument
5409 	 * indeed free this event, otherwise we need to serialize on  in perf_remove_from_owner()
5412 	owner = READ_ONCE(event->owner);  in perf_remove_from_owner()
5435 		 * We have to re-check the event->owner field, if it is cleared  in perf_remove_from_owner()
5438 		 * event.  in perf_remove_from_owner()
5440 		if (event->owner) {  in perf_remove_from_owner()
5441 			list_del_init(&event->owner_entry);  in perf_remove_from_owner()
5442 			smp_store_release(&event->owner, NULL);  in perf_remove_from_owner()
5449 static void put_event(struct perf_event *event)  in put_event()  argument
5451 	if (!atomic_long_dec_and_test(&event->refcount))  in put_event()
5454 	_free_event(event);  in put_event()
5458  * Kill an event dead; while event:refcount will preserve the event
5462 int perf_event_release_kernel(struct perf_event *event)  in perf_event_release_kernel()  argument
5464 	struct perf_event_context *ctx = event->ctx;  in perf_event_release_kernel()
5469 	 * If we got here through err_alloc: free_event(event); we will not  in perf_event_release_kernel()
5473 		WARN_ON_ONCE(event->attach_state &  in perf_event_release_kernel()
5478 	if (!is_kernel_event(event))  in perf_event_release_kernel()
5479 		perf_remove_from_owner(event);  in perf_event_release_kernel()
5481 	ctx = perf_event_ctx_lock(event);  in perf_event_release_kernel()
5485 	 * Mark this event as STATE_DEAD, there is no external reference to it  in perf_event_release_kernel()
5488 	 * Anybody acquiring event->child_mutex after the below loop _must_  in perf_event_release_kernel()
5495 	perf_remove_from_context(event, DETACH_GROUP|DETACH_DEAD);  in perf_event_release_kernel()
5497 	perf_event_ctx_unlock(event, ctx);  in perf_event_release_kernel()
5500 	mutex_lock(&event->child_mutex);  in perf_event_release_kernel()
5501 	list_for_each_entry(child, &event->child_list, child_list) {  in perf_event_release_kernel()
5513 		 * Since the event cannot get freed while we hold the  in perf_event_release_kernel()
5524 		mutex_unlock(&event->child_mutex);  in perf_event_release_kernel()
5526 		mutex_lock(&event->child_mutex);  in perf_event_release_kernel()
5533 		tmp = list_first_entry_or_null(&event->child_list,  in perf_event_release_kernel()
5542 			put_event(event);  in perf_event_release_kernel()
5547 		mutex_unlock(&event->child_mutex);  in perf_event_release_kernel()
5562 	mutex_unlock(&event->child_mutex);  in perf_event_release_kernel()
5571 		 * Wake any perf_event_free_task() waiting for this event to be  in perf_event_release_kernel()
5579 	put_event(event); /* Must be the 'last' reference */  in perf_event_release_kernel()
5593 static u64 __perf_event_read_value(struct perf_event *event, u64 *enabled, u64 *running)  in __perf_event_read_value()  argument
5601 	mutex_lock(&event->child_mutex);  in __perf_event_read_value()
5603 	(void)perf_event_read(event, false);  in __perf_event_read_value()
5604 	total += perf_event_count(event, false);  in __perf_event_read_value()
5606 	*enabled += event->total_time_enabled +  in __perf_event_read_value()
5607 			atomic64_read(&event->child_total_time_enabled);  in __perf_event_read_value()
5608 	*running += event->total_time_running +  in __perf_event_read_value()
5609 			atomic64_read(&event->child_total_time_running);  in __perf_event_read_value()
5611 	list_for_each_entry(child, &event->child_list, child_list) {  in __perf_event_read_value()
5617 	mutex_unlock(&event->child_mutex);  in __perf_event_read_value()
5622 u64 perf_event_read_value(struct perf_event *event, u64 *enabled, u64 *running)  in perf_event_read_value()  argument
5627 	ctx = perf_event_ctx_lock(event);  in perf_event_read_value()
5628 	count = __perf_event_read_value(event, enabled, running);  in perf_event_read_value()
5629 	perf_event_ctx_unlock(event, ctx);  in perf_event_read_value()
5714 static int perf_read_group(struct perf_event *event,  in perf_read_group()  argument
5717 	struct perf_event *leader = event->group_leader, *child;  in perf_read_group()
5724 	values = kzalloc(event->read_size, GFP_KERNEL);  in perf_read_group()
5744 	ret = event->read_size;  in perf_read_group()
5745 	if (copy_to_user(buf, values, event->read_size))  in perf_read_group()
5756 static int perf_read_one(struct perf_event *event,  in perf_read_one()  argument
5763 	values[n++] = __perf_event_read_value(event, &enabled, &running);  in perf_read_one()
5769 		values[n++] = primary_event_id(event);  in perf_read_one()
5771 		values[n++] = atomic64_read(&event->lost_samples);  in perf_read_one()
5779 static bool is_event_hup(struct perf_event *event)  in is_event_hup()  argument
5783 	if (event->state > PERF_EVENT_STATE_EXIT)  in is_event_hup()
5786 	mutex_lock(&event->child_mutex);  in is_event_hup()
5787 	no_children = list_empty(&event->child_list);  in is_event_hup()
5788 	mutex_unlock(&event->child_mutex);  in is_event_hup()
5793  * Read the performance event - simple non blocking version for now
5796 __perf_read(struct perf_event *event, char __user *buf, size_t count)  in __perf_read()  argument
5798 	u64 read_format = event->attr.read_format;  in __perf_read()
5802 	 * Return end-of-file for a read on an event that is in  in __perf_read()
5806 	if (event->state == PERF_EVENT_STATE_ERROR)  in __perf_read()
5809 	if (count < event->read_size)  in __perf_read()
5812 	WARN_ON_ONCE(event->ctx->parent_ctx);  in __perf_read()
5814 		ret = perf_read_group(event, read_format, buf);  in __perf_read()
5816 		ret = perf_read_one(event, read_format, buf);  in __perf_read()
5824 	struct perf_event *event = file->private_data;  in perf_read()  local
5828 	ret = security_perf_event_read(event);  in perf_read()
5832 	ctx = perf_event_ctx_lock(event);  in perf_read()
5833 	ret = __perf_read(event, buf, count);  in perf_read()
5834 	perf_event_ctx_unlock(event, ctx);  in perf_read()
5841 	struct perf_event *event = file->private_data;  in perf_poll()  local
5845 	poll_wait(file, &event->waitq, wait);  in perf_poll()
5847 	if (is_event_hup(event))  in perf_poll()
5851 	 * Pin the event->rb by taking event->mmap_mutex; otherwise  in perf_poll()
5854 	mutex_lock(&event->mmap_mutex);  in perf_poll()
5855 	rb = event->rb;  in perf_poll()
5858 	mutex_unlock(&event->mmap_mutex);  in perf_poll()
5862 static void _perf_event_reset(struct perf_event *event)  in _perf_event_reset()  argument
5864 	(void)perf_event_read(event, false);  in _perf_event_reset()
5865 	local64_set(&event->count, 0);  in _perf_event_reset()
5866 	perf_event_update_userpage(event);  in _perf_event_reset()
5869 /* Assume it's not an event with inherit set. */
5870 u64 perf_event_pause(struct perf_event *event, bool reset)  in perf_event_pause()  argument
5875 	ctx = perf_event_ctx_lock(event);  in perf_event_pause()
5876 	WARN_ON_ONCE(event->attr.inherit);  in perf_event_pause()
5877 	_perf_event_disable(event);  in perf_event_pause()
5878 	count = local64_read(&event->count);  in perf_event_pause()
5880 		local64_set(&event->count, 0);  in perf_event_pause()
5881 	perf_event_ctx_unlock(event, ctx);  in perf_event_pause()
5888  * Holding the top-level event's child_mutex means that any
5889  * descendant process that has inherited this event will block
5893 static void perf_event_for_each_child(struct perf_event *event,  in perf_event_for_each_child()  argument
5898 	WARN_ON_ONCE(event->ctx->parent_ctx);  in perf_event_for_each_child()
5900 	mutex_lock(&event->child_mutex);  in perf_event_for_each_child()
5901 	func(event);  in perf_event_for_each_child()
5902 	list_for_each_entry(child, &event->child_list, child_list)  in perf_event_for_each_child()
5904 	mutex_unlock(&event->child_mutex);  in perf_event_for_each_child()
5907 static void perf_event_for_each(struct perf_event *event,  in perf_event_for_each()  argument
5910 	struct perf_event_context *ctx = event->ctx;  in perf_event_for_each()
5915 	event = event->group_leader;  in perf_event_for_each()
5917 	perf_event_for_each_child(event, func);  in perf_event_for_each()
5918 	for_each_sibling_event(sibling, event)  in perf_event_for_each()
5922 static void __perf_event_period(struct perf_event *event,  in __perf_event_period()  argument
5930 	if (event->attr.freq) {  in __perf_event_period()
5931 		event->attr.sample_freq = value;  in __perf_event_period()
5933 		event->attr.sample_period = value;  in __perf_event_period()
5934 		event->hw.sample_period = value;  in __perf_event_period()
5937 	active = (event->state == PERF_EVENT_STATE_ACTIVE);  in __perf_event_period()
5939 		perf_pmu_disable(event->pmu);  in __perf_event_period()
5942 		 * trying to unthrottle while we already re-started the event.  in __perf_event_period()
5944 		if (event->hw.interrupts == MAX_INTERRUPTS) {  in __perf_event_period()
5945 			event->hw.interrupts = 0;  in __perf_event_period()
5946 			perf_log_throttle(event, 1);  in __perf_event_period()
5948 		event->pmu->stop(event, PERF_EF_UPDATE);  in __perf_event_period()
5951 	local64_set(&event->hw.period_left, 0);  in __perf_event_period()
5954 		event->pmu->start(event, PERF_EF_RELOAD);  in __perf_event_period()
5955 		perf_pmu_enable(event->pmu);  in __perf_event_period()
5959 static int perf_event_check_period(struct perf_event *event, u64 value)  in perf_event_check_period()  argument
5961 	return event->pmu->check_period(event, value);  in perf_event_check_period()
5964 static int _perf_event_period(struct perf_event *event, u64 value)  in _perf_event_period()  argument
5966 	if (!is_sampling_event(event))  in _perf_event_period()
5972 	if (event->attr.freq && value > sysctl_perf_event_sample_rate)  in _perf_event_period()
5975 	if (perf_event_check_period(event, value))  in _perf_event_period()
5978 	if (!event->attr.freq && (value & (1ULL << 63)))  in _perf_event_period()
5981 	event_function_call(event, __perf_event_period, &value);  in _perf_event_period()
5986 int perf_event_period(struct perf_event *event, u64 value)  in perf_event_period()  argument
5991 	ctx = perf_event_ctx_lock(event);  in perf_event_period()
5992 	ret = _perf_event_period(event, value);  in perf_event_period()
5993 	perf_event_ctx_unlock(event, ctx);  in perf_event_period()
6015 static int perf_event_set_output(struct perf_event *event,
6017 static int perf_event_set_filter(struct perf_event *event, void __user *arg);
6021 static long _perf_ioctl(struct perf_event *event, unsigned int cmd, unsigned long arg)  in _perf_ioctl()  argument
6038 		return _perf_event_refresh(event, arg);  in _perf_ioctl()
6047 		return _perf_event_period(event, value);  in _perf_ioctl()
6051 		u64 id = primary_event_id(event);  in _perf_ioctl()
6068 			ret = perf_event_set_output(event, output_event);  in _perf_ioctl()
6071 			ret = perf_event_set_output(event, NULL);  in _perf_ioctl()
6077 		return perf_event_set_filter(event, (void __user *)arg);  in _perf_ioctl()
6088 		err = perf_event_set_bpf_prog(event, prog, 0);  in _perf_ioctl()
6101 		rb = rcu_dereference(event->rb);  in _perf_ioctl()
6112 		return perf_event_query_prog_array(event, (void __user *)arg);  in _perf_ioctl()
6122 		return perf_event_modify_attr(event,  &new_attr);  in _perf_ioctl()
6129 		perf_event_for_each(event, func);  in _perf_ioctl()
6131 		perf_event_for_each_child(event, func);  in _perf_ioctl()
6138 	struct perf_event *event = file->private_data;  in perf_ioctl()  local
6143 	ret = security_perf_event_write(event);  in perf_ioctl()
6147 	ctx = perf_event_ctx_lock(event);  in perf_ioctl()
6148 	ret = _perf_ioctl(event, cmd, arg);  in perf_ioctl()
6149 	perf_event_ctx_unlock(event, ctx);  in perf_ioctl()
6179 	struct perf_event *event;  in perf_event_task_enable()  local
6182 	list_for_each_entry(event, &current->perf_event_list, owner_entry) {  in perf_event_task_enable()
6183 		ctx = perf_event_ctx_lock(event);  in perf_event_task_enable()
6184 		perf_event_for_each_child(event, _perf_event_enable);  in perf_event_task_enable()
6185 		perf_event_ctx_unlock(event, ctx);  in perf_event_task_enable()
6195 	struct perf_event *event;  in perf_event_task_disable()  local
6198 	list_for_each_entry(event, &current->perf_event_list, owner_entry) {  in perf_event_task_disable()
6199 		ctx = perf_event_ctx_lock(event);  in perf_event_task_disable()
6200 		perf_event_for_each_child(event, _perf_event_disable);  in perf_event_task_disable()
6201 		perf_event_ctx_unlock(event, ctx);  in perf_event_task_disable()
6208 static int perf_event_index(struct perf_event *event)  in perf_event_index()  argument
6210 	if (event->hw.state & PERF_HES_STOPPED)  in perf_event_index()
6213 	if (event->state != PERF_EVENT_STATE_ACTIVE)  in perf_event_index()
6216 	return event->pmu->event_idx(event);  in perf_event_index()
6219 static void perf_event_init_userpage(struct perf_event *event)  in perf_event_init_userpage()  argument
6225 	rb = rcu_dereference(event->rb);  in perf_event_init_userpage()
6242 	struct perf_event *event, struct perf_event_mmap_page *userpg, u64 now)  in arch_perf_update_userpage()  argument
6251 void perf_event_update_userpage(struct perf_event *event)  in perf_event_update_userpage()  argument
6258 	rb = rcu_dereference(event->rb);  in perf_event_update_userpage()
6264 	 * based on snapshot values taken when the event  in perf_event_update_userpage()
6271 	calc_timer_values(event, &now, &enabled, &running);  in perf_event_update_userpage()
6281 	userpg->index = perf_event_index(event);  in perf_event_update_userpage()
6282 	userpg->offset = perf_event_count(event, false);  in perf_event_update_userpage()
6284 		userpg->offset -= local64_read(&event->hw.prev_count);  in perf_event_update_userpage()
6287 			atomic64_read(&event->child_total_time_enabled);  in perf_event_update_userpage()
6290 			atomic64_read(&event->child_total_time_running);  in perf_event_update_userpage()
6292 	arch_perf_update_userpage(event, userpg, now);  in perf_event_update_userpage()
6304 	struct perf_event *event = vmf->vma->vm_file->private_data;  in perf_mmap_fault()  local
6315 	rb = rcu_dereference(event->rb);  in perf_mmap_fault()
6337 static void ring_buffer_attach(struct perf_event *event,  in ring_buffer_attach()  argument
6343 	WARN_ON_ONCE(event->parent);  in ring_buffer_attach()
6345 	if (event->rb) {  in ring_buffer_attach()
6348 		 * event->rb_entry and wait/clear when adding event->rb_entry.  in ring_buffer_attach()
6350 		WARN_ON_ONCE(event->rcu_pending);  in ring_buffer_attach()
6352 		old_rb = event->rb;  in ring_buffer_attach()
6354 		list_del_rcu(&event->rb_entry);  in ring_buffer_attach()
6357 		event->rcu_batches = get_state_synchronize_rcu();  in ring_buffer_attach()
6358 		event->rcu_pending = 1;  in ring_buffer_attach()
6362 		if (event->rcu_pending) {  in ring_buffer_attach()
6363 			cond_synchronize_rcu(event->rcu_batches);  in ring_buffer_attach()
6364 			event->rcu_pending = 0;  in ring_buffer_attach()
6368 		list_add_rcu(&event->rb_entry, &rb->event_list);  in ring_buffer_attach()
6373 	 * Avoid racing with perf_mmap_close(AUX): stop the event  in ring_buffer_attach()
6374 	 * before swizzling the event::rb pointer; if it's getting  in ring_buffer_attach()
6382 	if (has_aux(event))  in ring_buffer_attach()
6383 		perf_event_stop(event, 0);  in ring_buffer_attach()
6385 	rcu_assign_pointer(event->rb, rb);  in ring_buffer_attach()
6394 		wake_up_all(&event->waitq);  in ring_buffer_attach()
6398 static void ring_buffer_wakeup(struct perf_event *event)  in ring_buffer_wakeup()  argument
6402 	if (event->parent)  in ring_buffer_wakeup()
6403 		event = event->parent;  in ring_buffer_wakeup()
6406 	rb = rcu_dereference(event->rb);  in ring_buffer_wakeup()
6408 		list_for_each_entry_rcu(event, &rb->event_list, rb_entry)  in ring_buffer_wakeup()
6409 			wake_up_all(&event->waitq);  in ring_buffer_wakeup()
6414 struct perf_buffer *ring_buffer_get(struct perf_event *event)  in ring_buffer_get()  argument
6418 	if (event->parent)  in ring_buffer_get()
6419 		event = event->parent;  in ring_buffer_get()
6422 	rb = rcu_dereference(event->rb);  in ring_buffer_get()
6444 	struct perf_event *event = vma->vm_file->private_data;  in perf_mmap_open()  local
6446 	atomic_inc(&event->mmap_count);  in perf_mmap_open()
6447 	atomic_inc(&event->rb->mmap_count);  in perf_mmap_open()
6450 		atomic_inc(&event->rb->aux_mmap_count);  in perf_mmap_open()
6452 	if (event->pmu->event_mapped)  in perf_mmap_open()
6453 		event->pmu->event_mapped(event, vma->vm_mm);  in perf_mmap_open()
6456 static void perf_pmu_output_stop(struct perf_event *event);
6460  * event, or through other events by use of perf_event_set_output().
6468 	struct perf_event *event = vma->vm_file->private_data;  in perf_mmap_close()  local
6469 	struct perf_buffer *rb = ring_buffer_get(event);  in perf_mmap_close()
6475 	if (event->pmu->event_unmapped)  in perf_mmap_close()
6476 		event->pmu->event_unmapped(event, vma->vm_mm);  in perf_mmap_close()
6490 		perf_pmu_output_stop(event);  in perf_mmap_close()
6506 	if (!atomic_dec_and_mutex_lock(&event->mmap_count, &event->mmap_mutex))  in perf_mmap_close()
6509 	ring_buffer_attach(event, NULL);  in perf_mmap_close()
6510 	mutex_unlock(&event->mmap_mutex);  in perf_mmap_close()
6523 	list_for_each_entry_rcu(event, &rb->event_list, rb_entry) {  in perf_mmap_close()
6524 		if (!atomic_long_inc_not_zero(&event->refcount)) {  in perf_mmap_close()
6526 			 * This event is en-route to free_event() which will  in perf_mmap_close()
6533 		mutex_lock(&event->mmap_mutex);  in perf_mmap_close()
6539 		 * If we find a different rb; ignore this event, a next  in perf_mmap_close()
6544 		if (event->rb == rb)  in perf_mmap_close()
6545 			ring_buffer_attach(event, NULL);  in perf_mmap_close()
6547 		mutex_unlock(&event->mmap_mutex);  in perf_mmap_close()
6548 		put_event(event);  in perf_mmap_close()
6585 	struct perf_event *event = file->private_data;  in perf_mmap()  local
6601 	if (event->cpu == -1 && event->attr.inherit)  in perf_mmap()
6607 	ret = security_perf_event_read(event);  in perf_mmap()
6623 		if (!event->rb)  in perf_mmap()
6630 		mutex_lock(&event->mmap_mutex);  in perf_mmap()
6633 		rb = event->rb;  in perf_mmap()
6688 	WARN_ON_ONCE(event->ctx->parent_ctx);  in perf_mmap()
6690 	mutex_lock(&event->mmap_mutex);  in perf_mmap()
6691 	if (event->rb) {  in perf_mmap()
6692 		if (data_page_nr(event->rb) != nr_pages) {  in perf_mmap()
6697 		if (!atomic_inc_not_zero(&event->rb->mmap_count)) {  in perf_mmap()
6700 			 * event and try again.  in perf_mmap()
6702 			ring_buffer_attach(event, NULL);  in perf_mmap()
6703 			mutex_unlock(&event->mmap_mutex);  in perf_mmap()
6749 	WARN_ON(!rb && event->rb);  in perf_mmap()
6756 			      event->attr.watermark ? event->attr.wakeup_watermark : 0,  in perf_mmap()
6757 			      event->cpu, flags);  in perf_mmap()
6768 		ring_buffer_attach(event, rb);  in perf_mmap()
6770 		perf_event_update_time(event);  in perf_mmap()
6771 		perf_event_init_userpage(event);  in perf_mmap()
6772 		perf_event_update_userpage(event);  in perf_mmap()
6774 		ret = rb_alloc_aux(rb, event, vma->vm_pgoff, nr_pages,  in perf_mmap()
6775 				   event->attr.aux_watermark, flags);  in perf_mmap()
6785 		atomic_inc(&event->mmap_count);  in perf_mmap()
6792 	mutex_unlock(&event->mmap_mutex);  in perf_mmap()
6801 	if (event->pmu->event_mapped)  in perf_mmap()
6802 		event->pmu->event_mapped(event, vma->vm_mm);  in perf_mmap()
6810 	struct perf_event *event = filp->private_data;  in perf_fasync()  local
6814 	retval = fasync_helper(fd, filp, on, &event->fasync);  in perf_fasync()
6834  * Perf event wakeup
6840 void perf_event_wakeup(struct perf_event *event)  in perf_event_wakeup()  argument
6842 	ring_buffer_wakeup(event);  in perf_event_wakeup()
6844 	if (event->pending_kill) {  in perf_event_wakeup()
6845 		kill_fasync(perf_event_fasync(event), SIGIO, event->pending_kill);  in perf_event_wakeup()
6846 		event->pending_kill = 0;  in perf_event_wakeup()
6850 static void perf_sigtrap(struct perf_event *event)  in perf_sigtrap()  argument
6857 	if (WARN_ON_ONCE(event->ctx->task != current))  in perf_sigtrap()
6867 	send_sig_perf((void __user *)event->pending_addr,  in perf_sigtrap()
6868 		      event->orig_type, event->attr.sig_data);  in perf_sigtrap()
6872  * Deliver the pending work in-event-context or follow the context.
6874 static void __perf_pending_disable(struct perf_event *event)  in __perf_pending_disable()  argument
6876 	int cpu = READ_ONCE(event->oncpu);  in __perf_pending_disable()
6879 	 * If the event isn't running; we done. event_sched_out() will have  in __perf_pending_disable()
6886 	 * Yay, we hit home and are in the context of the event.  in __perf_pending_disable()
6889 		if (event->pending_disable) {  in __perf_pending_disable()
6890 			event->pending_disable = 0;  in __perf_pending_disable()
6891 			perf_event_disable_local(event);  in __perf_pending_disable()
6914 	 * But the event runs on CPU-B and wants disabling there.  in __perf_pending_disable()
6916 	irq_work_queue_on(&event->pending_disable_irq, cpu);  in __perf_pending_disable()
6921 	struct perf_event *event = container_of(entry, struct perf_event, pending_disable_irq);  in perf_pending_disable()  local
6929 	__perf_pending_disable(event);  in perf_pending_disable()
6936 	struct perf_event *event = container_of(entry, struct perf_event, pending_irq);  in perf_pending_irq()  local
6946 	 * The wakeup isn't bound to the context of the event -- it can happen  in perf_pending_irq()
6947 	 * irrespective of where the event is.  in perf_pending_irq()
6949 	if (event->pending_wakeup) {  in perf_pending_irq()
6950 		event->pending_wakeup = 0;  in perf_pending_irq()
6951 		perf_event_wakeup(event);  in perf_pending_irq()
6960 	struct perf_event *event = container_of(head, struct perf_event, pending_task);  in perf_pending_task()  local
6964 	 * All accesses to the event must belong to the same implicit RCU read-side  in perf_pending_task()
6975 	if (event->pending_work) {  in perf_pending_task()
6976 		event->pending_work = 0;  in perf_pending_task()
6977 		perf_sigtrap(event);  in perf_pending_task()
6978 		local_dec(&event->ctx->nr_no_switch_fast);  in perf_pending_task()
6979 		rcuwait_wake_up(&event->pending_work_wait);  in perf_pending_task()
7158 static unsigned long perf_prepare_sample_aux(struct perf_event *event,  in perf_prepare_sample_aux()  argument
7162 	struct perf_event *sampler = event->aux_event;  in perf_prepare_sample_aux()
7197                                  struct perf_event *event,  in perf_pmu_snapshot_aux()  argument
7207 	 * the IRQ ones, that is, for example, re-starting an event that's just  in perf_pmu_snapshot_aux()
7209 	 * doesn't change the event state.  in perf_pmu_snapshot_aux()
7221 	ret = event->pmu->snapshot_aux(event, handle, size);  in perf_pmu_snapshot_aux()
7230 static void perf_aux_sample_output(struct perf_event *event,  in perf_aux_sample_output()  argument
7234 	struct perf_event *sampler = event->aux_event;  in perf_aux_sample_output()
7276  * when event->attr.sample_id_all is set.
7283 					 struct perf_event *event,  in __perf_event_header__init_id()  argument
7286 	data->type = event->attr.sample_type;  in __perf_event_header__init_id()
7291 		data->tid_entry.pid = perf_event_pid(event, current);  in __perf_event_header__init_id()
7292 		data->tid_entry.tid = perf_event_tid(event, current);  in __perf_event_header__init_id()
7296 		data->time = perf_event_clock(event);  in __perf_event_header__init_id()
7299 		data->id = primary_event_id(event);  in __perf_event_header__init_id()
7302 		data->stream_id = event->id;  in __perf_event_header__init_id()
7312 				struct perf_event *event)  in perf_event_header__init_id()  argument
7314 	if (event->attr.sample_id_all) {  in perf_event_header__init_id()
7315 		header->size += event->id_header_size;  in perf_event_header__init_id()
7316 		__perf_event_header__init_id(data, event, event->attr.sample_type);  in perf_event_header__init_id()
7344 void perf_event__output_id_sample(struct perf_event *event,  in perf_event__output_id_sample()  argument
7348 	if (event->attr.sample_id_all)  in perf_event__output_id_sample()
7353 				 struct perf_event *event,  in perf_output_read_one()  argument
7356 	u64 read_format = event->attr.read_format;  in perf_output_read_one()
7360 	values[n++] = perf_event_count(event, has_inherit_and_sample_read(&event->attr));  in perf_output_read_one()
7363 			atomic64_read(&event->child_total_time_enabled);  in perf_output_read_one()
7367 			atomic64_read(&event->child_total_time_running);  in perf_output_read_one()
7370 		values[n++] = primary_event_id(event);  in perf_output_read_one()
7372 		values[n++] = atomic64_read(&event->lost_samples);  in perf_output_read_one()
7378 				   struct perf_event *event,  in perf_output_read_group()  argument
7381 	struct perf_event *leader = event->group_leader, *sub;  in perf_output_read_group()
7382 	u64 read_format = event->attr.read_format;  in perf_output_read_group()
7386 	bool self = has_inherit_and_sample_read(&event->attr);  in perf_output_read_group()
7402 	if ((leader != event) &&  in perf_output_read_group()
7417 		if ((sub != event) &&  in perf_output_read_group()
7448 			     struct perf_event *event)  in perf_output_read()  argument
7451 	u64 read_format = event->attr.read_format;  in perf_output_read()
7455 	 * based on snapshot values taken when the event  in perf_output_read()
7463 		calc_timer_values(event, &now, &enabled, &running);  in perf_output_read()
7465 	if (event->attr.read_format & PERF_FORMAT_GROUP)  in perf_output_read()
7466 		perf_output_read_group(handle, event, enabled, running);  in perf_output_read()
7468 		perf_output_read_one(handle, event, enabled, running);  in perf_output_read()
7474 			struct perf_event *event)  in perf_output_sample()  argument
7508 		perf_output_read(handle, event);  in perf_output_sample()
7559 			if (branch_sample_hw_index(event))  in perf_output_sample()
7589 			u64 mask = event->attr.sample_regs_user;  in perf_output_sample()
7620 			u64 mask = event->attr.sample_regs_intr;  in perf_output_sample()
7644 			perf_aux_sample_output(event, handle, data);  in perf_output_sample()
7647 	if (!event->attr.watermark) {  in perf_output_sample()
7648 		int wakeup_events = event->attr.wakeup_events;  in perf_output_sample()
7791 perf_callchain(struct perf_event *event, struct pt_regs *regs)  in perf_callchain()  argument
7793 	bool kernel = !event->attr.exclude_callchain_kernel;  in perf_callchain()
7794 	bool user   = !event->attr.exclude_callchain_user;  in perf_callchain()
7796 	bool crosstask = event->ctx->task && event->ctx->task != current;  in perf_callchain()
7797 	const u32 max_stack = event->attr.sample_max_stack;  in perf_callchain()
7814 			 struct perf_event *event,  in perf_prepare_sample()  argument
7817 	u64 sample_type = event->attr.sample_type;  in perf_prepare_sample()
7835 		data->type = event->attr.sample_type;  in perf_prepare_sample()
7839 	__perf_event_header__init_id(data, event, filtered_sample_type);  in perf_prepare_sample()
7847 		perf_sample_save_callchain(data, event, regs);  in perf_prepare_sample()
7874 			u64 mask = event->attr.sample_regs_user;  in perf_prepare_sample()
7889 		u16 stack_size = event->attr.sample_stack_user;  in perf_prepare_sample()
7890 		u16 header_size = perf_sample_data_size(data, event);  in perf_prepare_sample()
7936 			u64 mask = event->attr.sample_regs_intr;  in perf_prepare_sample()
7978 		u16 header_size = perf_sample_data_size(data, event);  in perf_prepare_sample()
7989 			     event->attr.aux_sample_size);  in perf_prepare_sample()
7991 		size = perf_prepare_sample_aux(event, data, size);  in perf_prepare_sample()
8001 			 struct perf_event *event,  in perf_prepare_header()  argument
8005 	header->size = perf_sample_data_size(data, event);  in perf_prepare_header()
8020 __perf_event_output(struct perf_event *event,  in __perf_event_output()  argument
8035 	perf_prepare_sample(data, event, regs);  in __perf_event_output()
8036 	perf_prepare_header(&header, data, event, regs);  in __perf_event_output()
8038 	err = output_begin(&handle, data, event, header.size);  in __perf_event_output()
8042 	perf_output_sample(&handle, &header, data, event);  in __perf_event_output()
8052 perf_event_output_forward(struct perf_event *event,  in perf_event_output_forward()  argument
8056 	__perf_event_output(event, data, regs, perf_output_begin_forward);  in perf_event_output_forward()
8060 perf_event_output_backward(struct perf_event *event,  in perf_event_output_backward()  argument
8064 	__perf_event_output(event, data, regs, perf_output_begin_backward);  in perf_event_output_backward()
8068 perf_event_output(struct perf_event *event,  in perf_event_output()  argument
8072 	return __perf_event_output(event, data, regs, perf_output_begin);  in perf_event_output()
8087 perf_event_read_event(struct perf_event *event,  in perf_event_read_event()  argument
8096 			.size = sizeof(read_event) + event->read_size,  in perf_event_read_event()
8098 		.pid = perf_event_pid(event, task),  in perf_event_read_event()
8099 		.tid = perf_event_tid(event, task),  in perf_event_read_event()
8103 	perf_event_header__init_id(&read_event.header, &sample, event);  in perf_event_read_event()
8104 	ret = perf_output_begin(&handle, &sample, event, read_event.header.size);  in perf_event_read_event()
8109 	perf_output_read(&handle, event);  in perf_event_read_event()
8110 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_read_event()
8115 typedef void (perf_iterate_f)(struct perf_event *event, void *data);
8122 	struct perf_event *event;  in perf_iterate_ctx()  local
8124 	list_for_each_entry_rcu(event, &ctx->event_list, event_entry) {  in perf_iterate_ctx()
8126 			if (event->state < PERF_EVENT_STATE_INACTIVE)  in perf_iterate_ctx()
8128 			if (!event_filter_match(event))  in perf_iterate_ctx()
8132 		output(event, data);  in perf_iterate_ctx()
8139 	struct perf_event *event;  in perf_iterate_sb_cpu()  local
8141 	list_for_each_entry_rcu(event, &pel->list, sb_list) {  in perf_iterate_sb_cpu()
8144 		 * if we observe event->ctx, both event and ctx will be  in perf_iterate_sb_cpu()
8147 		if (!smp_load_acquire(&event->ctx))  in perf_iterate_sb_cpu()
8150 		if (event->state < PERF_EVENT_STATE_INACTIVE)  in perf_iterate_sb_cpu()
8152 		if (!event_filter_match(event))  in perf_iterate_sb_cpu()
8154 		output(event, data);  in perf_iterate_sb_cpu()
8162  * your event, otherwise it might not get delivered.
8197 static void perf_event_addr_filters_exec(struct perf_event *event, void *data)  in perf_event_addr_filters_exec()  argument
8199 	struct perf_addr_filters_head *ifh = perf_event_addr_filters(event);  in perf_event_addr_filters_exec()
8204 	if (!has_addr_filter(event))  in perf_event_addr_filters_exec()
8210 			event->addr_filter_ranges[count].start = 0;  in perf_event_addr_filters_exec()
8211 			event->addr_filter_ranges[count].size = 0;  in perf_event_addr_filters_exec()
8219 		event->addr_filters_gen++;  in perf_event_addr_filters_exec()
8223 		perf_event_stop(event, 1);  in perf_event_addr_filters_exec()
8247 static void __perf_event_output_stop(struct perf_event *event, void *data)  in __perf_event_output_stop()  argument
8249 	struct perf_event *parent = event->parent;  in __perf_event_output_stop()
8253 		.event	= event,  in __perf_event_output_stop()
8256 	if (!has_aux(event))  in __perf_event_output_stop()
8260 		parent = event;  in __perf_event_output_stop()
8266 	 * We are using event::rb to determine if the event should be stopped,  in __perf_event_output_stop()
8268 	 * which will make us skip the event that actually needs to be stopped.  in __perf_event_output_stop()
8269 	 * So ring_buffer_attach() has to stop an aux event before re-assigning  in __perf_event_output_stop()
8278 	struct perf_event *event = info;  in __perf_pmu_output_stop()  local
8281 		.rb	= event->rb,  in __perf_pmu_output_stop()
8294 static void perf_pmu_output_stop(struct perf_event *event)  in perf_pmu_output_stop()  argument
8301 	list_for_each_entry_rcu(iter, &event->rb->event_list, rb_entry) {  in perf_pmu_output_stop()
8305 		 * sufficient to stop the event itself if it's active, since  in perf_pmu_output_stop()
8315 		err = cpu_function_call(cpu, __perf_pmu_output_stop, event);  in perf_pmu_output_stop()
8345 static int perf_event_task_match(struct perf_event *event)  in perf_event_task_match()  argument
8347 	return event->attr.comm  || event->attr.mmap ||  in perf_event_task_match()
8348 	       event->attr.mmap2 || event->attr.mmap_data ||  in perf_event_task_match()
8349 	       event->attr.task;  in perf_event_task_match()
8352 static void perf_event_task_output(struct perf_event *event,  in perf_event_task_output()  argument
8361 	if (!perf_event_task_match(event))  in perf_event_task_output()
8364 	perf_event_header__init_id(&task_event->event_id.header, &sample, event);  in perf_event_task_output()
8366 	ret = perf_output_begin(&handle, &sample, event,  in perf_event_task_output()
8371 	task_event->event_id.pid = perf_event_pid(event, task);  in perf_event_task_output()
8372 	task_event->event_id.tid = perf_event_tid(event, task);  in perf_event_task_output()
8375 		task_event->event_id.ppid = perf_event_pid(event,  in perf_event_task_output()
8377 		task_event->event_id.ptid = perf_event_pid(event,  in perf_event_task_output()
8380 		task_event->event_id.ppid = perf_event_pid(event, current);  in perf_event_task_output()
8381 		task_event->event_id.ptid = perf_event_tid(event, current);  in perf_event_task_output()
8384 	task_event->event_id.time = perf_event_clock(event);  in perf_event_task_output()
8388 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_task_output()
8451 static int perf_event_comm_match(struct perf_event *event)  in perf_event_comm_match()  argument
8453 	return event->attr.comm;  in perf_event_comm_match()
8456 static void perf_event_comm_output(struct perf_event *event,  in perf_event_comm_output()  argument
8465 	if (!perf_event_comm_match(event))  in perf_event_comm_output()
8468 	perf_event_header__init_id(&comm_event->event_id.header, &sample, event);  in perf_event_comm_output()
8469 	ret = perf_output_begin(&handle, &sample, event,  in perf_event_comm_output()
8475 	comm_event->event_id.pid = perf_event_pid(event, comm_event->task);  in perf_event_comm_output()
8476 	comm_event->event_id.tid = perf_event_tid(event, comm_event->task);  in perf_event_comm_output()
8482 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_comm_output()
8550 static int perf_event_namespaces_match(struct perf_event *event)  in perf_event_namespaces_match()  argument
8552 	return event->attr.namespaces;  in perf_event_namespaces_match()
8555 static void perf_event_namespaces_output(struct perf_event *event,  in perf_event_namespaces_output()  argument
8564 	if (!perf_event_namespaces_match(event))  in perf_event_namespaces_output()
8568 				   &sample, event);  in perf_event_namespaces_output()
8569 	ret = perf_output_begin(&handle, &sample, event,  in perf_event_namespaces_output()
8574 	namespaces_event->event_id.pid = perf_event_pid(event,  in perf_event_namespaces_output()
8576 	namespaces_event->event_id.tid = perf_event_tid(event,  in perf_event_namespaces_output()
8581 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_namespaces_output()
8678 static int perf_event_cgroup_match(struct perf_event *event)  in perf_event_cgroup_match()  argument
8680 	return event->attr.cgroup;  in perf_event_cgroup_match()
8683 static void perf_event_cgroup_output(struct perf_event *event, void *data)  in perf_event_cgroup_output()  argument
8691 	if (!perf_event_cgroup_match(event))  in perf_event_cgroup_output()
8695 				   &sample, event);  in perf_event_cgroup_output()
8696 	ret = perf_output_begin(&handle, &sample, event,  in perf_event_cgroup_output()
8704 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_cgroup_output()
8789 static int perf_event_mmap_match(struct perf_event *event,  in perf_event_mmap_match()  argument
8796 	return (!executable && event->attr.mmap_data) ||  in perf_event_mmap_match()
8797 	       (executable && (event->attr.mmap || event->attr.mmap2));  in perf_event_mmap_match()
8800 static void perf_event_mmap_output(struct perf_event *event,  in perf_event_mmap_output()  argument
8811 	if (!perf_event_mmap_match(event, data))  in perf_event_mmap_output()
8814 	if (event->attr.mmap2) {  in perf_event_mmap_output()
8824 	perf_event_header__init_id(&mmap_event->event_id.header, &sample, event);  in perf_event_mmap_output()
8825 	ret = perf_output_begin(&handle, &sample, event,  in perf_event_mmap_output()
8830 	mmap_event->event_id.pid = perf_event_pid(event, current);  in perf_event_mmap_output()
8831 	mmap_event->event_id.tid = perf_event_tid(event, current);  in perf_event_mmap_output()
8833 	use_build_id = event->attr.build_id && mmap_event->build_id_size;  in perf_event_mmap_output()
8835 	if (event->attr.mmap2 && use_build_id)  in perf_event_mmap_output()
8840 	if (event->attr.mmap2) {  in perf_event_mmap_output()
8859 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_mmap_output()
9020 static void __perf_addr_filters_adjust(struct perf_event *event, void *data)  in __perf_addr_filters_adjust()  argument
9022 	struct perf_addr_filters_head *ifh = perf_event_addr_filters(event);  in __perf_addr_filters_adjust()
9028 	if (!has_addr_filter(event))  in __perf_addr_filters_adjust()
9037 						&event->addr_filter_ranges[count]))  in __perf_addr_filters_adjust()
9044 		event->addr_filters_gen++;  in __perf_addr_filters_adjust()
9048 		perf_event_stop(event, 1);  in __perf_addr_filters_adjust()
9107 void perf_event_aux_event(struct perf_event *event, unsigned long head,  in perf_event_aux_event()  argument
9129 	perf_event_header__init_id(&rec.header, &sample, event);  in perf_event_aux_event()
9130 	ret = perf_output_begin(&handle, &sample, event, rec.header.size);  in perf_event_aux_event()
9136 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_aux_event()
9144 void perf_log_lost_samples(struct perf_event *event, u64 lost)  in perf_log_lost_samples()  argument
9162 	perf_event_header__init_id(&lost_samples_event.header, &sample, event);  in perf_log_lost_samples()
9164 	ret = perf_output_begin(&handle, &sample, event,  in perf_log_lost_samples()
9170 	perf_event__output_id_sample(event, &handle, &sample);  in perf_log_lost_samples()
9189 static int perf_event_switch_match(struct perf_event *event)  in perf_event_switch_match()  argument
9191 	return event->attr.context_switch;  in perf_event_switch_match()
9194 static void perf_event_switch_output(struct perf_event *event, void *data)  in perf_event_switch_output()  argument
9201 	if (!perf_event_switch_match(event))  in perf_event_switch_output()
9205 	if (event->ctx->task) {  in perf_event_switch_output()
9212 					perf_event_pid(event, se->next_prev);  in perf_event_switch_output()
9214 					perf_event_tid(event, se->next_prev);  in perf_event_switch_output()
9217 	perf_event_header__init_id(&se->event_id.header, &sample, event);  in perf_event_switch_output()
9219 	ret = perf_output_begin(&handle, &sample, event, se->event_id.header.size);  in perf_event_switch_output()
9223 	if (event->ctx->task)  in perf_event_switch_output()
9228 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_switch_output()
9266 static void perf_log_throttle(struct perf_event *event, int enable)  in perf_log_throttle()  argument
9283 		.time		= perf_event_clock(event),  in perf_log_throttle()
9284 		.id		= primary_event_id(event),  in perf_log_throttle()
9285 		.stream_id	= event->id,  in perf_log_throttle()
9291 	perf_event_header__init_id(&throttle_event.header, &sample, event);  in perf_log_throttle()
9293 	ret = perf_output_begin(&handle, &sample, event,  in perf_log_throttle()
9299 	perf_event__output_id_sample(event, &handle, &sample);  in perf_log_throttle()
9319 static int perf_event_ksymbol_match(struct perf_event *event)  in perf_event_ksymbol_match()  argument
9321 	return event->attr.ksymbol;  in perf_event_ksymbol_match()
9324 static void perf_event_ksymbol_output(struct perf_event *event, void *data)  in perf_event_ksymbol_output()  argument
9331 	if (!perf_event_ksymbol_match(event))  in perf_event_ksymbol_output()
9335 				   &sample, event);  in perf_event_ksymbol_output()
9336 	ret = perf_output_begin(&handle, &sample, event,  in perf_event_ksymbol_output()
9343 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_ksymbol_output()
9409 static int perf_event_bpf_match(struct perf_event *event)  in perf_event_bpf_match()  argument
9411 	return event->attr.bpf_event;  in perf_event_bpf_match()
9414 static void perf_event_bpf_output(struct perf_event *event, void *data)  in perf_event_bpf_output()  argument
9421 	if (!perf_event_bpf_match(event))  in perf_event_bpf_output()
9425 				   &sample, event);  in perf_event_bpf_output()
9426 	ret = perf_output_begin(&handle, &sample, event,  in perf_event_bpf_output()
9432 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_bpf_output()
9511 static int perf_event_text_poke_match(struct perf_event *event)  in perf_event_text_poke_match()  argument
9513 	return event->attr.text_poke;  in perf_event_text_poke_match()
9516 static void perf_event_text_poke_output(struct perf_event *event, void *data)  in perf_event_text_poke_output()  argument
9524 	if (!perf_event_text_poke_match(event))  in perf_event_text_poke_output()
9527 	perf_event_header__init_id(&text_poke_event->event_id.header, &sample, event);  in perf_event_text_poke_output()
9529 	ret = perf_output_begin(&handle, &sample, event,  in perf_event_text_poke_output()
9544 	perf_event__output_id_sample(event, &handle, &sample);  in perf_event_text_poke_output()
9581 void perf_event_itrace_started(struct perf_event *event)  in perf_event_itrace_started()  argument
9583 	event->attach_state |= PERF_ATTACH_ITRACE;  in perf_event_itrace_started()
9586 static void perf_log_itrace_start(struct perf_event *event)  in perf_log_itrace_start()  argument
9597 	if (event->parent)  in perf_log_itrace_start()
9598 		event = event->parent;  in perf_log_itrace_start()
9600 	if (!(event->pmu->capabilities & PERF_PMU_CAP_ITRACE) ||  in perf_log_itrace_start()
9601 	    event->attach_state & PERF_ATTACH_ITRACE)  in perf_log_itrace_start()
9607 	rec.pid	= perf_event_pid(event, current);  in perf_log_itrace_start()
9608 	rec.tid	= perf_event_tid(event, current);  in perf_log_itrace_start()
9610 	perf_event_header__init_id(&rec.header, &sample, event);  in perf_log_itrace_start()
9611 	ret = perf_output_begin(&handle, &sample, event, rec.header.size);  in perf_log_itrace_start()
9617 	perf_event__output_id_sample(event, &handle, &sample);  in perf_log_itrace_start()
9622 void perf_report_aux_output_id(struct perf_event *event, u64 hw_id)  in perf_report_aux_output_id()  argument
9632 	if (event->parent)  in perf_report_aux_output_id()
9633 		event = event->parent;  in perf_report_aux_output_id()
9640 	perf_event_header__init_id(&rec.header, &sample, event);  in perf_report_aux_output_id()
9641 	ret = perf_output_begin(&handle, &sample, event, rec.header.size);  in perf_report_aux_output_id()
9647 	perf_event__output_id_sample(event, &handle, &sample);  in perf_report_aux_output_id()
9654 __perf_event_account_interrupt(struct perf_event *event, int throttle)  in __perf_event_account_interrupt()  argument
9656 	struct hw_perf_event *hwc = &event->hw;  in __perf_event_account_interrupt()
9671 			perf_log_throttle(event, 0);  in __perf_event_account_interrupt()
9676 	if (event->attr.freq) {  in __perf_event_account_interrupt()
9683 			perf_adjust_period(event, delta, hwc->last_period, true);  in __perf_event_account_interrupt()
9689 int perf_event_account_interrupt(struct perf_event *event)  in perf_event_account_interrupt()  argument
9691 	return __perf_event_account_interrupt(event, 1);  in perf_event_account_interrupt()
9694 static inline bool sample_is_allowed(struct perf_event *event, struct pt_regs *regs)  in sample_is_allowed()  argument
9701 	if (event->attr.exclude_kernel && !user_mode(regs))  in sample_is_allowed()
9708 static int bpf_overflow_handler(struct perf_event *event,  in bpf_overflow_handler()  argument
9714 		.event = event,  in bpf_overflow_handler()
9723 	prog = READ_ONCE(event->prog);  in bpf_overflow_handler()
9725 		perf_prepare_sample(data, event, regs);  in bpf_overflow_handler()
9735 static inline int perf_event_set_bpf_handler(struct perf_event *event,  in perf_event_set_bpf_handler()  argument
9739 	if (event->overflow_handler_context)  in perf_event_set_bpf_handler()
9743 	if (event->prog)  in perf_event_set_bpf_handler()
9749 	if (event->attr.precise_ip &&  in perf_event_set_bpf_handler()
9751 	    (!(event->attr.sample_type & PERF_SAMPLE_CALLCHAIN) ||  in perf_event_set_bpf_handler()
9752 	     event->attr.exclude_callchain_kernel ||  in perf_event_set_bpf_handler()
9753 	     event->attr.exclude_callchain_user)) {  in perf_event_set_bpf_handler()
9766 	event->prog = prog;  in perf_event_set_bpf_handler()
9767 	event->bpf_cookie = bpf_cookie;  in perf_event_set_bpf_handler()
9771 static inline void perf_event_free_bpf_handler(struct perf_event *event)  in perf_event_free_bpf_handler()  argument
9773 	struct bpf_prog *prog = event->prog;  in perf_event_free_bpf_handler()
9778 	event->prog = NULL;  in perf_event_free_bpf_handler()
9782 static inline int bpf_overflow_handler(struct perf_event *event,  in bpf_overflow_handler()  argument
9789 static inline int perf_event_set_bpf_handler(struct perf_event *event,  in perf_event_set_bpf_handler()  argument
9796 static inline void perf_event_free_bpf_handler(struct perf_event *event)  in perf_event_free_bpf_handler()  argument
9802  * Generic event overflow handling, sampling.
9805 static int __perf_event_overflow(struct perf_event *event,  in __perf_event_overflow()  argument
9809 	int events = atomic_read(&event->event_limit);  in __perf_event_overflow()
9816 	if (unlikely(!is_sampling_event(event)))  in __perf_event_overflow()
9819 	ret = __perf_event_account_interrupt(event, throttle);  in __perf_event_overflow()
9821 	if (event->prog && event->prog->type == BPF_PROG_TYPE_PERF_EVENT &&  in __perf_event_overflow()
9822 	    !bpf_overflow_handler(event, data, regs))  in __perf_event_overflow()
9830 	event->pending_kill = POLL_IN;  in __perf_event_overflow()
9831 	if (events && atomic_dec_and_test(&event->event_limit)) {  in __perf_event_overflow()
9833 		event->pending_kill = POLL_HUP;  in __perf_event_overflow()
9834 		perf_event_disable_inatomic(event);  in __perf_event_overflow()
9837 	if (event->attr.sigtrap) {  in __perf_event_overflow()
9841 		 * it is the first event, on the other hand, we should also not  in __perf_event_overflow()
9844 		bool valid_sample = sample_is_allowed(event, regs);  in __perf_event_overflow()
9853 		if (!event->pending_work &&  in __perf_event_overflow()
9854 		    !task_work_add(current, &event->pending_task, notify_mode)) {  in __perf_event_overflow()
9855 			event->pending_work = pending_id;  in __perf_event_overflow()
9856 			local_inc(&event->ctx->nr_no_switch_fast);  in __perf_event_overflow()
9858 			event->pending_addr = 0;  in __perf_event_overflow()
9860 				event->pending_addr = data->addr;  in __perf_event_overflow()
9862 		} else if (event->attr.exclude_kernel && valid_sample) {  in __perf_event_overflow()
9875 			WARN_ON_ONCE(event->pending_work != pending_id);  in __perf_event_overflow()
9879 	READ_ONCE(event->overflow_handler)(event, data, regs);  in __perf_event_overflow()  local
9881 	if (*perf_event_fasync(event) && event->pending_kill) {  in __perf_event_overflow()
9882 		event->pending_wakeup = 1;  in __perf_event_overflow()
9883 		irq_work_queue(&event->pending_irq);  in __perf_event_overflow()
9889 int perf_event_overflow(struct perf_event *event,  in perf_event_overflow()  argument
9893 	return __perf_event_overflow(event, 1, data, regs);  in perf_event_overflow()
9897  * Generic software event infrastructure
9908  * We directly increment event->count and keep a second value in
9909  * event->hw.period_left to count intervals. This period event
9914 u64 perf_swevent_set_period(struct perf_event *event)  in perf_swevent_set_period()  argument
9916 	struct hw_perf_event *hwc = &event->hw;  in perf_swevent_set_period()
9937 static void perf_swevent_overflow(struct perf_event *event, u64 overflow,  in perf_swevent_overflow()  argument
9941 	struct hw_perf_event *hwc = &event->hw;  in perf_swevent_overflow()
9945 		overflow = perf_swevent_set_period(event);  in perf_swevent_overflow()
9951 		if (__perf_event_overflow(event, throttle,  in perf_swevent_overflow()
9963 static void perf_swevent_event(struct perf_event *event, u64 nr,  in perf_swevent_event()  argument
9967 	struct hw_perf_event *hwc = &event->hw;  in perf_swevent_event()
9969 	local64_add(nr, &event->count);  in perf_swevent_event()
9974 	if (!is_sampling_event(event))  in perf_swevent_event()
9977 	if ((event->attr.sample_type & PERF_SAMPLE_PERIOD) && !event->attr.freq) {  in perf_swevent_event()
9979 		return perf_swevent_overflow(event, 1, data, regs);  in perf_swevent_event()
9981 		data->period = event->hw.last_period;  in perf_swevent_event()
9983 	if (nr == 1 && hwc->sample_period == 1 && !event->attr.freq)  in perf_swevent_event()
9984 		return perf_swevent_overflow(event, 1, data, regs);  in perf_swevent_event()
9989 	perf_swevent_overflow(event, 0, data, regs);  in perf_swevent_event()
9992 static int perf_exclude_event(struct perf_event *event,  in perf_exclude_event()  argument
9995 	if (event->hw.state & PERF_HES_STOPPED)  in perf_exclude_event()
9999 		if (event->attr.exclude_user && user_mode(regs))  in perf_exclude_event()
10002 		if (event->attr.exclude_kernel && !user_mode(regs))  in perf_exclude_event()
10009 static int perf_swevent_match(struct perf_event *event,  in perf_swevent_match()  argument
10015 	if (event->attr.type != type)  in perf_swevent_match()
10018 	if (event->attr.config != event_id)  in perf_swevent_match()
10021 	if (perf_exclude_event(event, regs))  in perf_swevent_match()
10055 /* For the event head insertion and removal in the hlist */
10057 find_swevent_head(struct swevent_htable *swhash, struct perf_event *event)  in find_swevent_head()  argument
10060 	u32 event_id = event->attr.config;  in find_swevent_head()
10061 	u64 type = event->attr.type;  in find_swevent_head()
10064 	 * Event scheduling is always serialized against hlist allocation  in find_swevent_head()
10069 					  lockdep_is_held(&event->ctx->lock));  in find_swevent_head()
10082 	struct perf_event *event;  in do_perf_sw_event()  local
10090 	hlist_for_each_entry_rcu(event, head, hlist_entry) {  in do_perf_sw_event()
10091 		if (perf_swevent_match(event, type, event_id, data, regs))  in do_perf_sw_event()
10092 			perf_swevent_event(event, nr, data, regs);  in do_perf_sw_event()
10138 static void perf_swevent_read(struct perf_event *event)  in perf_swevent_read()  argument
10142 static int perf_swevent_add(struct perf_event *event, int flags)  in perf_swevent_add()  argument
10145 	struct hw_perf_event *hwc = &event->hw;  in perf_swevent_add()
10148 	if (is_sampling_event(event)) {  in perf_swevent_add()
10150 		perf_swevent_set_period(event);  in perf_swevent_add()
10155 	head = find_swevent_head(swhash, event);  in perf_swevent_add()
10159 	hlist_add_head_rcu(&event->hlist_entry, head);  in perf_swevent_add()
10160 	perf_event_update_userpage(event);  in perf_swevent_add()
10165 static void perf_swevent_del(struct perf_event *event, int flags)  in perf_swevent_del()  argument
10167 	hlist_del_rcu(&event->hlist_entry);  in perf_swevent_del()
10170 static void perf_swevent_start(struct perf_event *event, int flags)  in perf_swevent_start()  argument
10172 	event->hw.state = 0;  in perf_swevent_start()
10175 static void perf_swevent_stop(struct perf_event *event, int flags)  in perf_swevent_stop()  argument
10177 	event->hw.state = PERF_HES_STOPPED;  in perf_swevent_stop()
10269 static void sw_perf_event_destroy(struct perf_event *event)  in sw_perf_event_destroy()  argument
10271 	u64 event_id = event->attr.config;  in sw_perf_event_destroy()
10273 	WARN_ON(event->parent);  in sw_perf_event_destroy()
10282 static int perf_swevent_init(struct perf_event *event)  in perf_swevent_init()  argument
10284 	u64 event_id = event->attr.config;  in perf_swevent_init()
10286 	if (event->attr.type != PERF_TYPE_SOFTWARE)  in perf_swevent_init()
10292 	if (has_branch_stack(event))  in perf_swevent_init()
10297 		event->attr.type = perf_cpu_clock.type;  in perf_swevent_init()
10300 		event->attr.type = perf_task_clock.type;  in perf_swevent_init()
10310 	if (!event->parent) {  in perf_swevent_init()
10318 		event->destroy = sw_perf_event_destroy;  in perf_swevent_init()
10339 static void tp_perf_event_destroy(struct perf_event *event)  in tp_perf_event_destroy()  argument
10341 	perf_trace_destroy(event);  in tp_perf_event_destroy()
10344 static int perf_tp_event_init(struct perf_event *event)  in perf_tp_event_init()  argument
10348 	if (event->attr.type != PERF_TYPE_TRACEPOINT)  in perf_tp_event_init()
10354 	if (has_branch_stack(event))  in perf_tp_event_init()
10357 	err = perf_trace_init(event);  in perf_tp_event_init()
10361 	event->destroy = tp_perf_event_destroy;  in perf_tp_event_init()
10377 static int perf_tp_filter_match(struct perf_event *event,  in perf_tp_filter_match()  argument
10383 	if (event->parent)  in perf_tp_filter_match()
10384 		event = event->parent;  in perf_tp_filter_match()
10386 	if (likely(!event->filter) || filter_match_preds(event->filter, record))  in perf_tp_filter_match()
10391 static int perf_tp_event_match(struct perf_event *event,  in perf_tp_event_match()  argument
10395 	if (event->hw.state & PERF_HES_STOPPED)  in perf_tp_event_match()
10400 	if (event->attr.exclude_kernel && !user_mode(regs))  in perf_tp_event_match()
10403 	if (!perf_tp_filter_match(event, data))  in perf_tp_event_match()
10421 	perf_tp_event(call->event.type, count, raw_data, size, regs, head,  in perf_trace_run_bpf_submit()
10429 					struct perf_event *event)  in __perf_tp_event_target_task()  argument
10433 	if (event->attr.config != entry->type)  in __perf_tp_event_target_task()
10436 	if (event->attr.sigtrap)  in __perf_tp_event_target_task()
10438 	if (perf_tp_event_match(event, data, regs))  in __perf_tp_event_target_task()
10439 		perf_swevent_event(event, count, data, regs);  in __perf_tp_event_target_task()
10449 	struct perf_event *event, *sibling;  in perf_tp_event_target_task()  local
10451 	perf_event_groups_for_cpu_pmu(event, &ctx->pinned_groups, cpu, pmu) {  in perf_tp_event_target_task()
10452 		__perf_tp_event_target_task(count, record, regs, data, event);  in perf_tp_event_target_task()
10453 		for_each_sibling_event(sibling, event)  in perf_tp_event_target_task()
10457 	perf_event_groups_for_cpu_pmu(event, &ctx->flexible_groups, cpu, pmu) {  in perf_tp_event_target_task()
10458 		__perf_tp_event_target_task(count, record, regs, data, event);  in perf_tp_event_target_task()
10459 		for_each_sibling_event(sibling, event)  in perf_tp_event_target_task()
10469 	struct perf_event *event;  in perf_tp_event()  local
10483 	hlist_for_each_entry_rcu(event, head, hlist_entry) {  in perf_tp_event()
10484 		if (perf_tp_event_match(event, &data, regs)) {  in perf_tp_event()
10485 			perf_swevent_event(event, count, &data, regs);  in perf_tp_event()
10489 			 * some members in data are event-specific and  in perf_tp_event()
10492 			 * the problem that next event skips preparing data  in perf_tp_event()
10502 	 * deliver this event there too.  in perf_tp_event()
10563 static int perf_kprobe_event_init(struct perf_event *event);
10575 static int perf_kprobe_event_init(struct perf_event *event)  in perf_kprobe_event_init()  argument
10580 	if (event->attr.type != perf_kprobe.type)  in perf_kprobe_event_init()
10589 	if (has_branch_stack(event))  in perf_kprobe_event_init()
10592 	is_retprobe = event->attr.config & PERF_PROBE_CONFIG_IS_RETPROBE;  in perf_kprobe_event_init()
10593 	err = perf_kprobe_init(event, is_retprobe);  in perf_kprobe_event_init()
10597 	event->destroy = perf_kprobe_destroy;  in perf_kprobe_event_init()
10622 static int perf_uprobe_event_init(struct perf_event *event);
10634 static int perf_uprobe_event_init(struct perf_event *event)  in perf_uprobe_event_init()  argument
10640 	if (event->attr.type != perf_uprobe.type)  in perf_uprobe_event_init()
10649 	if (has_branch_stack(event))  in perf_uprobe_event_init()
10652 	is_retprobe = event->attr.config & PERF_PROBE_CONFIG_IS_RETPROBE;  in perf_uprobe_event_init()
10653 	ref_ctr_offset = event->attr.config >> PERF_UPROBE_REF_CTR_OFFSET_SHIFT;  in perf_uprobe_event_init()
10654 	err = perf_uprobe_init(event, ref_ctr_offset, is_retprobe);  in perf_uprobe_event_init()
10658 	event->destroy = perf_uprobe_destroy;  in perf_uprobe_event_init()
10675 static void perf_event_free_filter(struct perf_event *event)  in perf_event_free_filter()  argument
10677 	ftrace_profile_free_filter(event);  in perf_event_free_filter()
10681  * returns true if the event is a tracepoint, or a kprobe/upprobe created
10684 static inline bool perf_event_is_tracing(struct perf_event *event)  in perf_event_is_tracing()  argument
10686 	if (event->pmu == &perf_tracepoint)  in perf_event_is_tracing()
10689 	if (event->pmu == &perf_kprobe)  in perf_event_is_tracing()
10693 	if (event->pmu == &perf_uprobe)  in perf_event_is_tracing()
10699 int perf_event_set_bpf_prog(struct perf_event *event, struct bpf_prog *prog,  in perf_event_set_bpf_prog()  argument
10704 	if (!perf_event_is_tracing(event))  in perf_event_set_bpf_prog()
10705 		return perf_event_set_bpf_handler(event, prog, bpf_cookie);  in perf_event_set_bpf_prog()
10707 	is_kprobe = event->tp_event->flags & TRACE_EVENT_FL_KPROBE;  in perf_event_set_bpf_prog()
10708 	is_uprobe = event->tp_event->flags & TRACE_EVENT_FL_UPROBE;  in perf_event_set_bpf_prog()
10709 	is_tracepoint = event->tp_event->flags & TRACE_EVENT_FL_TRACEPOINT;  in perf_event_set_bpf_prog()
10710 	is_syscall_tp = is_syscall_trace_event(event->tp_event);  in perf_event_set_bpf_prog()
10729 		int off = trace_event_get_offsets(event->tp_event);  in perf_event_set_bpf_prog()
10735 	return perf_event_attach_bpf_prog(event, prog, bpf_cookie);  in perf_event_set_bpf_prog()
10738 void perf_event_free_bpf_prog(struct perf_event *event)  in perf_event_free_bpf_prog()  argument
10740 	if (!perf_event_is_tracing(event)) {  in perf_event_free_bpf_prog()
10741 		perf_event_free_bpf_handler(event);  in perf_event_free_bpf_prog()
10744 	perf_event_detach_bpf_prog(event);  in perf_event_free_bpf_prog()
10753 static void perf_event_free_filter(struct perf_event *event)  in perf_event_free_filter()  argument
10757 int perf_event_set_bpf_prog(struct perf_event *event, struct bpf_prog *prog,  in perf_event_set_bpf_prog()  argument
10763 void perf_event_free_bpf_prog(struct perf_event *event)  in perf_event_free_bpf_prog()  argument
10785 perf_addr_filter_new(struct perf_event *event, struct list_head *filters)  in perf_addr_filter_new()  argument
10787 	int node = cpu_to_node(event->cpu == -1 ? 0 : event->cpu);  in perf_addr_filter_new()
10814 static void perf_addr_filters_splice(struct perf_event *event,  in perf_addr_filters_splice()  argument
10820 	if (!has_addr_filter(event))  in perf_addr_filters_splice()
10824 	if (event->parent)  in perf_addr_filters_splice()
10827 	raw_spin_lock_irqsave(&event->addr_filters.lock, flags);  in perf_addr_filters_splice()
10829 	list_splice_init(&event->addr_filters.list, &list);  in perf_addr_filters_splice()
10831 		list_splice(head, &event->addr_filters.list);  in perf_addr_filters_splice()
10833 	raw_spin_unlock_irqrestore(&event->addr_filters.lock, flags);  in perf_addr_filters_splice()
10860  * Update event's address range filters based on the
10863 static void perf_event_addr_filters_apply(struct perf_event *event)  in perf_event_addr_filters_apply()  argument
10865 	struct perf_addr_filters_head *ifh = perf_event_addr_filters(event);  in perf_event_addr_filters_apply()
10866 	struct task_struct *task = READ_ONCE(event->ctx->task);  in perf_event_addr_filters_apply()
10873 	 * We may observe TASK_TOMBSTONE, which means that the event tear-down  in perf_event_addr_filters_apply()
10894 			event->addr_filter_ranges[count].start = 0;  in perf_event_addr_filters_apply()
10895 			event->addr_filter_ranges[count].size = 0;  in perf_event_addr_filters_apply()
10897 			perf_addr_filter_apply(filter, mm, &event->addr_filter_ranges[count]);  in perf_event_addr_filters_apply()
10899 			event->addr_filter_ranges[count].start = filter->offset;  in perf_event_addr_filters_apply()
10900 			event->addr_filter_ranges[count].size  = filter->size;  in perf_event_addr_filters_apply()
10906 	event->addr_filters_gen++;  in perf_event_addr_filters_apply()
10916 	perf_event_stop(event, 1);  in perf_event_addr_filters_apply()
10970 perf_event_parse_addr_filter(struct perf_event *event, char *fstr,  in perf_event_parse_addr_filter()  argument
10997 			filter = perf_addr_filter_new(event, filters);  in perf_event_parse_addr_filter()
11056 		 * Make sure that it doesn't contradict itself or the event's  in perf_event_parse_addr_filter()
11083 				if (!event->ctx->task)  in perf_event_parse_addr_filter()
11098 				event->addr_filters.nr_file_filters++;  in perf_event_parse_addr_filter()
11127 perf_event_set_addr_filter(struct perf_event *event, char *filter_str)  in perf_event_set_addr_filter()  argument
11136 	lockdep_assert_held(&event->ctx->mutex);  in perf_event_set_addr_filter()
11138 	if (WARN_ON_ONCE(event->parent))  in perf_event_set_addr_filter()
11141 	ret = perf_event_parse_addr_filter(event, filter_str, &filters);  in perf_event_set_addr_filter()
11145 	ret = event->pmu->addr_filters_validate(&filters);  in perf_event_set_addr_filter()
11150 	perf_addr_filters_splice(event, &filters);  in perf_event_set_addr_filter()
11153 	perf_event_for_each_child(event, perf_event_addr_filters_apply);  in perf_event_set_addr_filter()
11161 	event->addr_filters.nr_file_filters = 0;  in perf_event_set_addr_filter()
11166 static int perf_event_set_filter(struct perf_event *event, void __user *arg)  in perf_event_set_filter()  argument
11176 	if (perf_event_is_tracing(event)) {  in perf_event_set_filter()
11177 		struct perf_event_context *ctx = event->ctx;  in perf_event_set_filter()
11187 		 * This can result in event getting moved to a different ctx,  in perf_event_set_filter()
11191 		ret = ftrace_profile_set_filter(event, event->attr.config, filter_str);  in perf_event_set_filter()
11195 	if (has_addr_filter(event))  in perf_event_set_filter()
11196 		ret = perf_event_set_addr_filter(event, filter_str);  in perf_event_set_filter()
11211 	struct perf_event *event;  in perf_swevent_hrtimer()  local
11214 	event = container_of(hrtimer, struct perf_event, hw.hrtimer);  in perf_swevent_hrtimer()
11216 	if (event->state != PERF_EVENT_STATE_ACTIVE)  in perf_swevent_hrtimer()
11219 	event->pmu->read(event);  in perf_swevent_hrtimer()
11221 	perf_sample_data_init(&data, 0, event->hw.last_period);  in perf_swevent_hrtimer()
11224 	if (regs && !perf_exclude_event(event, regs)) {  in perf_swevent_hrtimer()
11225 		if (!(event->attr.exclude_idle && is_idle_task(current)))  in perf_swevent_hrtimer()
11226 			if (__perf_event_overflow(event, 1, &data, regs))  in perf_swevent_hrtimer()
11230 	period = max_t(u64, 10000, event->hw.sample_period);  in perf_swevent_hrtimer()
11236 static void perf_swevent_start_hrtimer(struct perf_event *event)  in perf_swevent_start_hrtimer()  argument
11238 	struct hw_perf_event *hwc = &event->hw;  in perf_swevent_start_hrtimer()
11241 	if (!is_sampling_event(event))  in perf_swevent_start_hrtimer()
11257 static void perf_swevent_cancel_hrtimer(struct perf_event *event)  in perf_swevent_cancel_hrtimer()  argument
11259 	struct hw_perf_event *hwc = &event->hw;  in perf_swevent_cancel_hrtimer()
11261 	if (is_sampling_event(event)) {  in perf_swevent_cancel_hrtimer()
11269 static void perf_swevent_init_hrtimer(struct perf_event *event)  in perf_swevent_init_hrtimer()  argument
11271 	struct hw_perf_event *hwc = &event->hw;  in perf_swevent_init_hrtimer()
11273 	if (!is_sampling_event(event))  in perf_swevent_init_hrtimer()
11283 	if (event->attr.freq) {  in perf_swevent_init_hrtimer()
11284 		long freq = event->attr.sample_freq;  in perf_swevent_init_hrtimer()
11286 		event->attr.sample_period = NSEC_PER_SEC / freq;  in perf_swevent_init_hrtimer()
11287 		hwc->sample_period = event->attr.sample_period;  in perf_swevent_init_hrtimer()
11290 		event->attr.freq = 0;  in perf_swevent_init_hrtimer()
11295  * Software event: cpu wall time clock
11298 static void cpu_clock_event_update(struct perf_event *event)  in cpu_clock_event_update()  argument
11304 	prev = local64_xchg(&event->hw.prev_count, now);  in cpu_clock_event_update()
11305 	local64_add(now - prev, &event->count);  in cpu_clock_event_update()
11308 static void cpu_clock_event_start(struct perf_event *event, int flags)  in cpu_clock_event_start()  argument
11310 	local64_set(&event->hw.prev_count, local_clock());  in cpu_clock_event_start()
11311 	perf_swevent_start_hrtimer(event);  in cpu_clock_event_start()
11314 static void cpu_clock_event_stop(struct perf_event *event, int flags)  in cpu_clock_event_stop()  argument
11316 	perf_swevent_cancel_hrtimer(event);  in cpu_clock_event_stop()
11317 	cpu_clock_event_update(event);  in cpu_clock_event_stop()
11320 static int cpu_clock_event_add(struct perf_event *event, int flags)  in cpu_clock_event_add()  argument
11323 		cpu_clock_event_start(event, flags);  in cpu_clock_event_add()
11324 	perf_event_update_userpage(event);  in cpu_clock_event_add()
11329 static void cpu_clock_event_del(struct perf_event *event, int flags)  in cpu_clock_event_del()  argument
11331 	cpu_clock_event_stop(event, flags);  in cpu_clock_event_del()
11334 static void cpu_clock_event_read(struct perf_event *event)  in cpu_clock_event_read()  argument
11336 	cpu_clock_event_update(event);  in cpu_clock_event_read()
11339 static int cpu_clock_event_init(struct perf_event *event)  in cpu_clock_event_init()  argument
11341 	if (event->attr.type != perf_cpu_clock.type)  in cpu_clock_event_init()
11344 	if (event->attr.config != PERF_COUNT_SW_CPU_CLOCK)  in cpu_clock_event_init()
11350 	if (has_branch_stack(event))  in cpu_clock_event_init()
11353 	perf_swevent_init_hrtimer(event);  in cpu_clock_event_init()
11373  * Software event: task time clock
11376 static void task_clock_event_update(struct perf_event *event, u64 now)  in task_clock_event_update()  argument
11381 	prev = local64_xchg(&event->hw.prev_count, now);  in task_clock_event_update()
11383 	local64_add(delta, &event->count);  in task_clock_event_update()
11386 static void task_clock_event_start(struct perf_event *event, int flags)  in task_clock_event_start()  argument
11388 	local64_set(&event->hw.prev_count, event->ctx->time);  in task_clock_event_start()
11389 	perf_swevent_start_hrtimer(event);  in task_clock_event_start()
11392 static void task_clock_event_stop(struct perf_event *event, int flags)  in task_clock_event_stop()  argument
11394 	perf_swevent_cancel_hrtimer(event);  in task_clock_event_stop()
11395 	task_clock_event_update(event, event->ctx->time);  in task_clock_event_stop()
11398 static int task_clock_event_add(struct perf_event *event, int flags)  in task_clock_event_add()  argument
11401 		task_clock_event_start(event, flags);  in task_clock_event_add()
11402 	perf_event_update_userpage(event);  in task_clock_event_add()
11407 static void task_clock_event_del(struct perf_event *event, int flags)  in task_clock_event_del()  argument
11409 	task_clock_event_stop(event, PERF_EF_UPDATE);  in task_clock_event_del()
11412 static void task_clock_event_read(struct perf_event *event)  in task_clock_event_read()  argument
11415 	u64 delta = now - event->ctx->timestamp;  in task_clock_event_read()
11416 	u64 time = event->ctx->time + delta;  in task_clock_event_read()
11418 	task_clock_event_update(event, time);  in task_clock_event_read()
11421 static int task_clock_event_init(struct perf_event *event)  in task_clock_event_init()  argument
11423 	if (event->attr.type != perf_task_clock.type)  in task_clock_event_init()
11426 	if (event->attr.config != PERF_COUNT_SW_TASK_CLOCK)  in task_clock_event_init()
11432 	if (has_branch_stack(event))  in task_clock_event_init()
11435 	perf_swevent_init_hrtimer(event);  in task_clock_event_init()
11467 static int perf_event_nop_int(struct perf_event *event, u64 value)  in perf_event_nop_int()  argument
11509 static int perf_event_idx_default(struct perf_event *event)  in perf_event_idx_default()  argument
11860 static inline bool has_extended_regs(struct perf_event *event)  in has_extended_regs()  argument
11862 	return (event->attr.sample_regs_user & PERF_REG_EXTENDED_MASK) ||  in has_extended_regs()
11863 	       (event->attr.sample_regs_intr & PERF_REG_EXTENDED_MASK);  in has_extended_regs()
11866 static int perf_try_init_event(struct pmu *pmu, struct perf_event *event)  in perf_try_init_event()  argument
11877 	 * if this is a sibling event, acquire the ctx->mutex to protect  in perf_try_init_event()
11880 	if (event->group_leader != event && pmu->task_ctx_nr != perf_sw_context) {  in perf_try_init_event()
11885 		ctx = perf_event_ctx_lock_nested(event->group_leader,  in perf_try_init_event()
11890 	event->pmu = pmu;  in perf_try_init_event()
11891 	ret = pmu->event_init(event);  in perf_try_init_event()
11894 		perf_event_ctx_unlock(event->group_leader, ctx);  in perf_try_init_event()
11898 		    has_extended_regs(event))  in perf_try_init_event()
11902 		    event_has_any_exclude_flag(event))  in perf_try_init_event()
11905 		if (pmu->scope != PERF_PMU_SCOPE_NONE && event->cpu >= 0) {  in perf_try_init_event()
11906 			const struct cpumask *cpumask = perf_scope_cpu_topology_cpumask(pmu->scope, event->cpu);  in perf_try_init_event()
11915 					event->event_caps |= PERF_EV_CAP_READ_SCOPE;  in perf_try_init_event()
11921 		if (ret && event->destroy)  in perf_try_init_event()
11922 			event->destroy(event);  in perf_try_init_event()
11931 static struct pmu *perf_init_event(struct perf_event *event)  in perf_init_event()  argument
11941 	 * pmus overwrites event->attr.type to forward event to another pmu.  in perf_init_event()
11943 	event->orig_type = event->attr.type;  in perf_init_event()
11946 	if (event->parent && event->parent->pmu) {  in perf_init_event()
11947 		pmu = event->parent->pmu;  in perf_init_event()
11948 		ret = perf_try_init_event(pmu, event);  in perf_init_event()
11957 	type = event->attr.type;  in perf_init_event()
11959 		type = event->attr.config >> PERF_PMU_TYPE_SHIFT;  in perf_init_event()
11964 			event->attr.config &= PERF_HW_EVENT_MASK;  in perf_init_event()
11973 		if (event->attr.type != type && type != PERF_TYPE_RAW &&  in perf_init_event()
11977 		ret = perf_try_init_event(pmu, event);  in perf_init_event()
11978 		if (ret == -ENOENT && event->attr.type != type && !extended_type) {  in perf_init_event()
11979 			type = event->attr.type;  in perf_init_event()
11990 		ret = perf_try_init_event(pmu, event);  in perf_init_event()
12007 static void attach_sb_event(struct perf_event *event)  in attach_sb_event()  argument
12009 	struct pmu_event_list *pel = per_cpu_ptr(&pmu_sb_events, event->cpu);  in attach_sb_event()
12012 	list_add_rcu(&event->sb_list, &pel->list);  in attach_sb_event()
12023 static void account_pmu_sb_event(struct perf_event *event)  in account_pmu_sb_event()  argument
12025 	if (is_sb_event(event))  in account_pmu_sb_event()
12026 		attach_sb_event(event);  in account_pmu_sb_event()
12050 static void account_event(struct perf_event *event)  in account_event()  argument
12054 	if (event->parent)  in account_event()
12057 	if (event->attach_state & (PERF_ATTACH_TASK | PERF_ATTACH_SCHED_CB))  in account_event()
12059 	if (event->attr.mmap || event->attr.mmap_data)  in account_event()
12061 	if (event->attr.build_id)  in account_event()
12063 	if (event->attr.comm)  in account_event()
12065 	if (event->attr.namespaces)  in account_event()
12067 	if (event->attr.cgroup)  in account_event()
12069 	if (event->attr.task)  in account_event()
12071 	if (event->attr.freq)  in account_event()
12073 	if (event->attr.context_switch) {  in account_event()
12077 	if (has_branch_stack(event))  in account_event()
12079 	if (is_cgroup_event(event))  in account_event()
12081 	if (event->attr.ksymbol)  in account_event()
12083 	if (event->attr.bpf_event)  in account_event()
12085 	if (event->attr.text_poke)  in account_event()
12116 	account_pmu_sb_event(event);  in account_event()
12120  * Allocate and initialize an event structure
12131 	struct perf_event *event;  in perf_event_alloc()  local
12146 	event = kmem_cache_alloc_node(perf_event_cache, GFP_KERNEL | __GFP_ZERO,  in perf_event_alloc()
12148 	if (!event)  in perf_event_alloc()
12156 		group_leader = event;  in perf_event_alloc()
12158 	mutex_init(&event->child_mutex);  in perf_event_alloc()
12159 	INIT_LIST_HEAD(&event->child_list);  in perf_event_alloc()
12161 	INIT_LIST_HEAD(&event->event_entry);  in perf_event_alloc()
12162 	INIT_LIST_HEAD(&event->sibling_list);  in perf_event_alloc()
12163 	INIT_LIST_HEAD(&event->active_list);  in perf_event_alloc()
12164 	init_event_group(event);  in perf_event_alloc()
12165 	INIT_LIST_HEAD(&event->rb_entry);  in perf_event_alloc()
12166 	INIT_LIST_HEAD(&event->active_entry);  in perf_event_alloc()
12167 	INIT_LIST_HEAD(&event->addr_filters.list);  in perf_event_alloc()
12168 	INIT_HLIST_NODE(&event->hlist_entry);  in perf_event_alloc()
12171 	init_waitqueue_head(&event->waitq);  in perf_event_alloc()
12172 	init_irq_work(&event->pending_irq, perf_pending_irq);  in perf_event_alloc()
12173 	event->pending_disable_irq = IRQ_WORK_INIT_HARD(perf_pending_disable);  in perf_event_alloc()
12174 	init_task_work(&event->pending_task, perf_pending_task);  in perf_event_alloc()
12175 	rcuwait_init(&event->pending_work_wait);  in perf_event_alloc()
12177 	mutex_init(&event->mmap_mutex);  in perf_event_alloc()
12178 	raw_spin_lock_init(&event->addr_filters.lock);  in perf_event_alloc()
12180 	atomic_long_set(&event->refcount, 1);  in perf_event_alloc()
12181 	event->cpu		= cpu;  in perf_event_alloc()
12182 	event->attr		= *attr;  in perf_event_alloc()
12183 	event->group_leader	= group_leader;  in perf_event_alloc()
12184 	event->pmu		= NULL;  in perf_event_alloc()
12185 	event->oncpu		= -1;  in perf_event_alloc()
12187 	event->parent		= parent_event;  in perf_event_alloc()
12189 	event->ns		= get_pid_ns(task_active_pid_ns(current));  in perf_event_alloc()
12190 	event->id		= atomic64_inc_return(&perf_event_id);  in perf_event_alloc()
12192 	event->state		= PERF_EVENT_STATE_INACTIVE;  in perf_event_alloc()
12195 		event->event_caps = parent_event->event_caps;  in perf_event_alloc()
12198 		event->attach_state = PERF_ATTACH_TASK;  in perf_event_alloc()
12204 		event->hw.target = get_task_struct(task);  in perf_event_alloc()
12207 	event->clock = &local_clock;  in perf_event_alloc()
12209 		event->clock = parent_event->clock;  in perf_event_alloc()
12219 			event->prog = prog;  in perf_event_alloc()
12225 		event->overflow_handler	= overflow_handler;  in perf_event_alloc()
12226 		event->overflow_handler_context = context;  in perf_event_alloc()
12227 	} else if (is_write_backward(event)){  in perf_event_alloc()
12228 		event->overflow_handler = perf_event_output_backward;  in perf_event_alloc()
12229 		event->overflow_handler_context = NULL;  in perf_event_alloc()
12231 		event->overflow_handler = perf_event_output_forward;  in perf_event_alloc()
12232 		event->overflow_handler_context = NULL;  in perf_event_alloc()
12235 	perf_event__state_init(event);  in perf_event_alloc()
12239 	hwc = &event->hw;  in perf_event_alloc()
12256 	if (!has_branch_stack(event))  in perf_event_alloc()
12257 		event->attr.branch_sample_type = 0;  in perf_event_alloc()
12259 	pmu = perf_init_event(event);  in perf_event_alloc()
12275 	if (event->attr.aux_output &&  in perf_event_alloc()
12282 		err = perf_cgroup_connect(cgroup_fd, event, attr, group_leader);  in perf_event_alloc()
12287 	err = exclusive_event_init(event);  in perf_event_alloc()
12291 	if (has_addr_filter(event)) {  in perf_event_alloc()
12292 		event->addr_filter_ranges = kcalloc(pmu->nr_addr_filters,  in perf_event_alloc()
12295 		if (!event->addr_filter_ranges) {  in perf_event_alloc()
12304 		if (event->parent) {  in perf_event_alloc()
12305 			struct perf_addr_filters_head *ifh = perf_event_addr_filters(event);  in perf_event_alloc()
12308 			memcpy(event->addr_filter_ranges,  in perf_event_alloc()
12309 			       event->parent->addr_filter_ranges,  in perf_event_alloc()
12315 		event->addr_filters_gen = 1;  in perf_event_alloc()
12318 	if (!event->parent) {  in perf_event_alloc()
12319 		if (event->attr.sample_type & PERF_SAMPLE_CALLCHAIN) {  in perf_event_alloc()
12326 	err = security_perf_event_alloc(event);  in perf_event_alloc()
12331 	account_event(event);  in perf_event_alloc()
12333 	return event;  in perf_event_alloc()
12336 	if (!event->parent) {  in perf_event_alloc()
12337 		if (event->attr.sample_type & PERF_SAMPLE_CALLCHAIN)  in perf_event_alloc()
12341 	kfree(event->addr_filter_ranges);  in perf_event_alloc()
12344 	exclusive_event_destroy(event);  in perf_event_alloc()
12347 	if (is_cgroup_event(event))  in perf_event_alloc()
12348 		perf_detach_cgroup(event);  in perf_event_alloc()
12349 	if (event->destroy)  in perf_event_alloc()
12350 		event->destroy(event);  in perf_event_alloc()
12353 	if (event->hw.target)  in perf_event_alloc()
12354 		put_task_struct(event->hw.target);  in perf_event_alloc()
12355 	call_rcu(&event->rcu_head, free_event_rcu);  in perf_event_alloc()
12496 perf_event_set_output(struct perf_event *event, struct perf_event *output_event)  in perf_event_set_output()  argument
12502 		mutex_lock(&event->mmap_mutex);  in perf_event_set_output()
12507 	if (event == output_event)  in perf_event_set_output()
12513 	if (output_event->cpu != event->cpu)  in perf_event_set_output()
12519 	if (output_event->cpu == -1 && output_event->hw.target != event->hw.target)  in perf_event_set_output()
12525 	if (output_event->clock != event->clock)  in perf_event_set_output()
12532 	if (is_write_backward(output_event) != is_write_backward(event))  in perf_event_set_output()
12538 	if (has_aux(event) && has_aux(output_event) &&  in perf_event_set_output()
12539 	    event->pmu != output_event->pmu)  in perf_event_set_output()
12545 	 * restarts after every removal, it is guaranteed this new event is  in perf_event_set_output()
12549 	mutex_lock_double(&event->mmap_mutex, &output_event->mmap_mutex);  in perf_event_set_output()
12552 	if (atomic_read(&event->mmap_count))  in perf_event_set_output()
12568 	ring_buffer_attach(event, rb);  in perf_event_set_output()
12572 	mutex_unlock(&event->mmap_mutex);  in perf_event_set_output()
12580 static int perf_event_set_clock(struct perf_event *event, clockid_t clk_id)  in perf_event_set_clock()  argument
12586 		event->clock = &ktime_get_mono_fast_ns;  in perf_event_set_clock()
12591 		event->clock = &ktime_get_raw_fast_ns;  in perf_event_set_clock()
12596 		event->clock = &ktime_get_real_ns;  in perf_event_set_clock()
12600 		event->clock = &ktime_get_boottime_ns;  in perf_event_set_clock()
12604 		event->clock = &ktime_get_clocktai_ns;  in perf_event_set_clock()
12611 	if (!nmi_safe && !(event->pmu->capabilities & PERF_PMU_CAP_NO_NMI))  in perf_event_set_clock()
12649  * sys_perf_event_open - open a performance event, associate it to a task/cpu
12654  * @group_fd:		group leader event fd
12655  * @flags:		perf event open flags
12663 	struct perf_event *event, *sibling;  in SYSCALL_DEFINE5()  local
12766 	event = perf_event_alloc(&attr, cpu, task, group_leader, NULL,  in SYSCALL_DEFINE5()
12768 	if (IS_ERR(event)) {  in SYSCALL_DEFINE5()
12769 		err = PTR_ERR(event);  in SYSCALL_DEFINE5()
12773 	if (is_sampling_event(event)) {  in SYSCALL_DEFINE5()
12774 		if (event->pmu->capabilities & PERF_PMU_CAP_NO_INTERRUPT) {  in SYSCALL_DEFINE5()
12784 	pmu = event->pmu;  in SYSCALL_DEFINE5()
12787 		err = perf_event_set_clock(event, attr.clockid);  in SYSCALL_DEFINE5()
12793 		event->event_caps |= PERF_EV_CAP_SOFTWARE;  in SYSCALL_DEFINE5()
12802 		 * perf_install_in_context() call for this new event to  in SYSCALL_DEFINE5()
12814 	ctx = find_get_context(task, event);  in SYSCALL_DEFINE5()
12829 		 * Check if the @cpu we're creating an event for is online.  in SYSCALL_DEFINE5()
12834 		struct perf_cpu_context *cpuctx = per_cpu_ptr(&perf_cpu_context, event->cpu);  in SYSCALL_DEFINE5()
12853 		if (group_leader->clock != event->clock)  in SYSCALL_DEFINE5()
12861 		if (group_leader->cpu != event->cpu)  in SYSCALL_DEFINE5()
12876 		if (is_software_event(event) &&  in SYSCALL_DEFINE5()
12879 			 * If the event is a sw event, but the group_leader  in SYSCALL_DEFINE5()
12890 		} else if (!is_software_event(event)) {  in SYSCALL_DEFINE5()
12895 				 * try to add a hardware event, move the whole group to  in SYSCALL_DEFINE5()
12911 	pmu_ctx = find_get_pmu_context(pmu, ctx, event);  in SYSCALL_DEFINE5()
12916 	event->pmu_ctx = pmu_ctx;  in SYSCALL_DEFINE5()
12919 		err = perf_event_set_output(event, output_event);  in SYSCALL_DEFINE5()
12924 	if (!perf_event_validate_size(event)) {  in SYSCALL_DEFINE5()
12929 	if (perf_need_aux_event(event) && !perf_get_aux_event(event, group_leader)) {  in SYSCALL_DEFINE5()
12936 	 * because we need to serialize with concurrent event creation.  in SYSCALL_DEFINE5()
12938 	if (!exclusive_event_installable(event, ctx)) {  in SYSCALL_DEFINE5()
12945 	event_file = anon_inode_getfile("[perf_event]", &perf_fops, event, f_flags);  in SYSCALL_DEFINE5()
12985 		 * event. What we want here is event in the initial  in SYSCALL_DEFINE5()
12997 	 * perf_install_in_context() which is the point the event is active and  in SYSCALL_DEFINE5()
13000 	perf_event__header_size(event);  in SYSCALL_DEFINE5()
13001 	perf_event__id_header_size(event);  in SYSCALL_DEFINE5()
13003 	event->owner = current;  in SYSCALL_DEFINE5()
13005 	perf_install_in_context(ctx, event, event->cpu);  in SYSCALL_DEFINE5()
13016 	list_add_tail(&event->owner_entry, &current->perf_event_list);  in SYSCALL_DEFINE5()
13021 	 * new event on the sibling_list. This ensures destruction  in SYSCALL_DEFINE5()
13030 	put_pmu_ctx(event->pmu_ctx);  in SYSCALL_DEFINE5()
13031 	event->pmu_ctx = NULL; /* _free_event() */  in SYSCALL_DEFINE5()
13040 	free_event(event);  in SYSCALL_DEFINE5()
13057  * @overflow_handler: callback to trigger when we hit the event
13068 	struct perf_event *event;  in perf_event_create_kernel_counter()  local
13079 	event = perf_event_alloc(attr, cpu, task, NULL, NULL,  in perf_event_create_kernel_counter()
13081 	if (IS_ERR(event)) {  in perf_event_create_kernel_counter()
13082 		err = PTR_ERR(event);  in perf_event_create_kernel_counter()
13087 	event->owner = TASK_TOMBSTONE;  in perf_event_create_kernel_counter()
13088 	pmu = event->pmu;  in perf_event_create_kernel_counter()
13091 		event->event_caps |= PERF_EV_CAP_SOFTWARE;  in perf_event_create_kernel_counter()
13096 	ctx = find_get_context(task, event);  in perf_event_create_kernel_counter()
13109 	pmu_ctx = find_get_pmu_context(pmu, ctx, event);  in perf_event_create_kernel_counter()
13114 	event->pmu_ctx = pmu_ctx;  in perf_event_create_kernel_counter()
13118 		 * Check if the @cpu we're creating an event for is online.  in perf_event_create_kernel_counter()
13131 	if (!exclusive_event_installable(event, ctx)) {  in perf_event_create_kernel_counter()
13136 	perf_install_in_context(ctx, event, event->cpu);  in perf_event_create_kernel_counter()
13140 	return event;  in perf_event_create_kernel_counter()
13144 	event->pmu_ctx = NULL; /* _free_event() */  in perf_event_create_kernel_counter()
13150 	free_event(event);  in perf_event_create_kernel_counter()
13161 	struct perf_event *event, *sibling;  in __perf_pmu_remove()  local
13163 	perf_event_groups_for_cpu_pmu(event, groups, cpu, pmu) {  in __perf_pmu_remove()
13164 		perf_remove_from_context(event, 0);  in __perf_pmu_remove()
13165 		put_pmu_ctx(event->pmu_ctx);  in __perf_pmu_remove()
13166 		list_add(&event->migrate_entry, events);  in __perf_pmu_remove()
13168 		for_each_sibling_event(sibling, event) {  in __perf_pmu_remove()
13178 				     int cpu, struct perf_event *event)  in __perf_pmu_install_event()  argument
13181 	struct perf_event_context *old_ctx = event->ctx;  in __perf_pmu_install_event()
13185 	event->cpu = cpu;  in __perf_pmu_install_event()
13186 	epc = find_get_pmu_context(pmu, ctx, event);  in __perf_pmu_install_event()
13187 	event->pmu_ctx = epc;  in __perf_pmu_install_event()
13189 	if (event->state >= PERF_EVENT_STATE_OFF)  in __perf_pmu_install_event()
13190 		event->state = PERF_EVENT_STATE_INACTIVE;  in __perf_pmu_install_event()
13191 	perf_install_in_context(ctx, event, cpu);  in __perf_pmu_install_event()
13194 	 * Now that event->ctx is updated and visible, put the old ctx.  in __perf_pmu_install_event()
13202 	struct perf_event *event, *tmp;  in __perf_pmu_install()  local
13212 	list_for_each_entry_safe(event, tmp, events, migrate_entry) {  in __perf_pmu_install()
13213 		if (event->group_leader == event)  in __perf_pmu_install()
13216 		list_del(&event->migrate_entry);  in __perf_pmu_install()
13217 		__perf_pmu_install_event(pmu, ctx, cpu, event);  in __perf_pmu_install()
13224 	list_for_each_entry_safe(event, tmp, events, migrate_entry) {  in __perf_pmu_install()
13225 		list_del(&event->migrate_entry);  in __perf_pmu_install()
13226 		__perf_pmu_install_event(pmu, ctx, cpu, event);  in __perf_pmu_install()
13290 perf_event_exit_event(struct perf_event *event, struct perf_event_context *ctx)  in perf_event_exit_event()  argument
13292 	struct perf_event *parent_event = event->parent;  in perf_event_exit_event()
13312 	perf_remove_from_context(event, detach_flags);  in perf_event_exit_event()
13315 	if (event->state > PERF_EVENT_STATE_EXIT)  in perf_event_exit_event()
13316 		perf_event_set_state(event, PERF_EVENT_STATE_EXIT);  in perf_event_exit_event()
13328 		free_event(event);  in perf_event_exit_event()
13336 	perf_event_wakeup(event);  in perf_event_exit_event()
13401  * When a child task exits, feed back event values to parent events.
13408 	struct perf_event *event, *tmp;  in perf_event_exit_task()  local
13411 	list_for_each_entry_safe(event, tmp, &child->perf_event_list,  in perf_event_exit_task()
13413 		list_del_init(&event->owner_entry);  in perf_event_exit_task()
13420 		smp_store_release(&event->owner, NULL);  in perf_event_exit_task()
13435 static void perf_free_event(struct perf_event *event,  in perf_free_event()  argument
13438 	struct perf_event *parent = event->parent;  in perf_free_event()
13444 	list_del_init(&event->child_list);  in perf_free_event()
13450 	perf_group_detach(event);  in perf_free_event()
13451 	list_del_event(event, ctx);  in perf_free_event()
13453 	free_event(event);  in perf_free_event()
13466 	struct perf_event *event, *tmp;  in perf_event_free_task()  local
13486 	list_for_each_entry_safe(event, tmp, &ctx->event_list, event_entry)  in perf_event_free_task()
13487 		perf_free_event(event, ctx);  in perf_event_free_task()
13500 	 * _free_event()'s put_task_struct(event->hw.target) will be a  in perf_event_free_task()
13536 const struct perf_event_attr *perf_event_attrs(struct perf_event *event)  in perf_event_attrs()  argument
13538 	if (!event)  in perf_event_attrs()
13541 	return &event->attr;  in perf_event_attrs()
13554  * Inherit an event from parent task to child task.
13616 	 * Make the child state follow the state of the parent event,  in inherit_event()
13655 	 * Link this into the parent event's child list  in inherit_event()
13664  * Inherits an event group.
13708  * Creates the child task context and tries to inherit the event-group.
13711  * inherited_all set when we 'fail' to inherit an orphaned event; this is
13719 inherit_task_group(struct perf_event *event, struct task_struct *parent,  in inherit_task_group()  argument
13727 	if (!event->attr.inherit ||  in inherit_task_group()
13728 	    (event->attr.inherit_thread && !(clone_flags & CLONE_THREAD)) ||  in inherit_task_group()
13730 	    (event->attr.sigtrap && (clone_flags & CLONE_CLEAR_SIGHAND))) {  in inherit_task_group()
13750 	ret = inherit_group(event, parent, parent_ctx, child, child_ctx);  in inherit_task_group()
13764 	struct perf_event *event;  in perf_event_init_context()  local
13798 	perf_event_groups_for_each(event, &parent_ctx->pinned_groups) {  in perf_event_init_context()
13799 		ret = inherit_task_group(event, parent, parent_ctx,  in perf_event_init_context()
13814 	perf_event_groups_for_each(event, &parent_ctx->flexible_groups) {  in perf_event_init_context()
13815 		ret = inherit_task_group(event, parent, parent_ctx,  in perf_event_init_context()
13929 	struct perf_event *event;  in __perf_event_exit_context()  local
13933 	list_for_each_entry(event, &ctx->event_list, event_entry)  in __perf_event_exit_context()
13934 		__perf_remove_from_context(event, cpuctx, ctx, (void *)DETACH_GROUP);  in __perf_event_exit_context()