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-rw-r--r--include/linux/perf_event.h856
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diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
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+++ b/include/linux/perf_event.h
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+/*
+ * Performance events:
+ *
+ * Copyright (C) 2008-2009, Thomas Gleixner <tglx@linutronix.de>
+ * Copyright (C) 2008-2011, Red Hat, Inc., Ingo Molnar
+ * Copyright (C) 2008-2011, Red Hat, Inc., Peter Zijlstra
+ *
+ * Data type definitions, declarations, prototypes.
+ *
+ * Started by: Thomas Gleixner and Ingo Molnar
+ *
+ * For licencing details see kernel-base/COPYING
+ */
+#ifndef _LINUX_PERF_EVENT_H
+#define _LINUX_PERF_EVENT_H
+
+#include <uapi/linux/perf_event.h>
+
+/*
+ * Kernel-internal data types and definitions:
+ */
+
+#ifdef CONFIG_PERF_EVENTS
+# include <asm/perf_event.h>
+# include <asm/local64.h>
+#endif
+
+struct perf_guest_info_callbacks {
+ int (*is_in_guest)(void);
+ int (*is_user_mode)(void);
+ unsigned long (*get_guest_ip)(void);
+};
+
+#ifdef CONFIG_HAVE_HW_BREAKPOINT
+#include <asm/hw_breakpoint.h>
+#endif
+
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/rculist.h>
+#include <linux/rcupdate.h>
+#include <linux/spinlock.h>
+#include <linux/hrtimer.h>
+#include <linux/fs.h>
+#include <linux/pid_namespace.h>
+#include <linux/workqueue.h>
+#include <linux/ftrace.h>
+#include <linux/cpu.h>
+#include <linux/irq_work.h>
+#include <linux/static_key.h>
+#include <linux/atomic.h>
+#include <linux/sysfs.h>
+#include <linux/perf_regs.h>
+#include <asm/local.h>
+
+struct perf_callchain_entry {
+ __u64 nr;
+ __u64 ip[PERF_MAX_STACK_DEPTH];
+};
+
+struct perf_raw_record {
+ u32 size;
+ void *data;
+};
+
+/*
+ * single taken branch record layout:
+ *
+ * from: source instruction (may not always be a branch insn)
+ * to: branch target
+ * mispred: branch target was mispredicted
+ * predicted: branch target was predicted
+ *
+ * support for mispred, predicted is optional. In case it
+ * is not supported mispred = predicted = 0.
+ */
+struct perf_branch_entry {
+ __u64 from;
+ __u64 to;
+ __u64 mispred:1, /* target mispredicted */
+ predicted:1,/* target predicted */
+ reserved:62;
+};
+
+/*
+ * branch stack layout:
+ * nr: number of taken branches stored in entries[]
+ *
+ * Note that nr can vary from sample to sample
+ * branches (to, from) are stored from most recent
+ * to least recent, i.e., entries[0] contains the most
+ * recent branch.
+ */
+struct perf_branch_stack {
+ __u64 nr;
+ struct perf_branch_entry entries[0];
+};
+
+struct perf_regs_user {
+ __u64 abi;
+ struct pt_regs *regs;
+};
+
+struct task_struct;
+
+/*
+ * extra PMU register associated with an event
+ */
+struct hw_perf_event_extra {
+ u64 config; /* register value */
+ unsigned int reg; /* register address or index */
+ int alloc; /* extra register already allocated */
+ int idx; /* index in shared_regs->regs[] */
+};
+
+/**
+ * struct hw_perf_event - performance event hardware details:
+ */
+struct hw_perf_event {
+#ifdef CONFIG_PERF_EVENTS
+ union {
+ struct { /* hardware */
+ u64 config;
+ u64 last_tag;
+ unsigned long config_base;
+ unsigned long event_base;
+ int event_base_rdpmc;
+ int idx;
+ int last_cpu;
+ int flags;
+
+ struct hw_perf_event_extra extra_reg;
+ struct hw_perf_event_extra branch_reg;
+ };
+ struct { /* software */
+ struct hrtimer hrtimer;
+ };
+ struct { /* tracepoint */
+ struct task_struct *tp_target;
+ /* for tp_event->class */
+ struct list_head tp_list;
+ };
+#ifdef CONFIG_HAVE_HW_BREAKPOINT
+ struct { /* breakpoint */
+ /*
+ * Crufty hack to avoid the chicken and egg
+ * problem hw_breakpoint has with context
+ * creation and event initalization.
+ */
+ struct task_struct *bp_target;
+ struct arch_hw_breakpoint info;
+ struct list_head bp_list;
+ };
+#endif
+ };
+ int state;
+ local64_t prev_count;
+ u64 sample_period;
+ u64 last_period;
+ local64_t period_left;
+ u64 interrupts_seq;
+ u64 interrupts;
+
+ u64 freq_time_stamp;
+ u64 freq_count_stamp;
+#endif
+};
+
+/*
+ * hw_perf_event::state flags
+ */
+#define PERF_HES_STOPPED 0x01 /* the counter is stopped */
+#define PERF_HES_UPTODATE 0x02 /* event->count up-to-date */
+#define PERF_HES_ARCH 0x04
+
+struct perf_event;
+
+/*
+ * Common implementation detail of pmu::{start,commit,cancel}_txn
+ */
+#define PERF_EVENT_TXN 0x1
+
+/**
+ * struct pmu - generic performance monitoring unit
+ */
+struct pmu {
+ struct list_head entry;
+
+ struct device *dev;
+ const struct attribute_group **attr_groups;
+ char *name;
+ int type;
+
+ int * __percpu pmu_disable_count;
+ struct perf_cpu_context * __percpu pmu_cpu_context;
+ int task_ctx_nr;
+
+ /*
+ * Fully disable/enable this PMU, can be used to protect from the PMI
+ * as well as for lazy/batch writing of the MSRs.
+ */
+ void (*pmu_enable) (struct pmu *pmu); /* optional */
+ void (*pmu_disable) (struct pmu *pmu); /* optional */
+
+ /*
+ * Try and initialize the event for this PMU.
+ * Should return -ENOENT when the @event doesn't match this PMU.
+ */
+ int (*event_init) (struct perf_event *event);
+
+#define PERF_EF_START 0x01 /* start the counter when adding */
+#define PERF_EF_RELOAD 0x02 /* reload the counter when starting */
+#define PERF_EF_UPDATE 0x04 /* update the counter when stopping */
+
+ /*
+ * Adds/Removes a counter to/from the PMU, can be done inside
+ * a transaction, see the ->*_txn() methods.
+ */
+ int (*add) (struct perf_event *event, int flags);
+ void (*del) (struct perf_event *event, int flags);
+
+ /*
+ * Starts/Stops a counter present on the PMU. The PMI handler
+ * should stop the counter when perf_event_overflow() returns
+ * !0. ->start() will be used to continue.
+ */
+ void (*start) (struct perf_event *event, int flags);
+ void (*stop) (struct perf_event *event, int flags);
+
+ /*
+ * Updates the counter value of the event.
+ */
+ void (*read) (struct perf_event *event);
+
+ /*
+ * Group events scheduling is treated as a transaction, add
+ * group events as a whole and perform one schedulability test.
+ * If the test fails, roll back the whole group
+ *
+ * Start the transaction, after this ->add() doesn't need to
+ * do schedulability tests.
+ */
+ void (*start_txn) (struct pmu *pmu); /* optional */
+ /*
+ * If ->start_txn() disabled the ->add() schedulability test
+ * then ->commit_txn() is required to perform one. On success
+ * the transaction is closed. On error the transaction is kept
+ * open until ->cancel_txn() is called.
+ */
+ int (*commit_txn) (struct pmu *pmu); /* optional */
+ /*
+ * Will cancel the transaction, assumes ->del() is called
+ * for each successful ->add() during the transaction.
+ */
+ void (*cancel_txn) (struct pmu *pmu); /* optional */
+
+ /*
+ * Will return the value for perf_event_mmap_page::index for this event,
+ * if no implementation is provided it will default to: event->hw.idx + 1.
+ */
+ int (*event_idx) (struct perf_event *event); /*optional */
+
+ /*
+ * flush branch stack on context-switches (needed in cpu-wide mode)
+ */
+ void (*flush_branch_stack) (void);
+};
+
+/**
+ * enum perf_event_active_state - the states of a event
+ */
+enum perf_event_active_state {
+ PERF_EVENT_STATE_ERROR = -2,
+ PERF_EVENT_STATE_OFF = -1,
+ PERF_EVENT_STATE_INACTIVE = 0,
+ PERF_EVENT_STATE_ACTIVE = 1,
+};
+
+struct file;
+struct perf_sample_data;
+
+typedef void (*perf_overflow_handler_t)(struct perf_event *,
+ struct perf_sample_data *,
+ struct pt_regs *regs);
+
+enum perf_group_flag {
+ PERF_GROUP_SOFTWARE = 0x1,
+};
+
+#define SWEVENT_HLIST_BITS 8
+#define SWEVENT_HLIST_SIZE (1 << SWEVENT_HLIST_BITS)
+
+struct swevent_hlist {
+ struct hlist_head heads[SWEVENT_HLIST_SIZE];
+ struct rcu_head rcu_head;
+};
+
+#define PERF_ATTACH_CONTEXT 0x01
+#define PERF_ATTACH_GROUP 0x02
+#define PERF_ATTACH_TASK 0x04
+
+struct perf_cgroup;
+struct ring_buffer;
+
+/**
+ * struct perf_event - performance event kernel representation:
+ */
+struct perf_event {
+#ifdef CONFIG_PERF_EVENTS
+ struct list_head group_entry;
+ struct list_head event_entry;
+ struct list_head sibling_list;
+ struct hlist_node hlist_entry;
+ int nr_siblings;
+ int group_flags;
+ struct perf_event *group_leader;
+ struct pmu *pmu;
+
+ enum perf_event_active_state state;
+ unsigned int attach_state;
+ local64_t count;
+ atomic64_t child_count;
+
+ /*
+ * These are the total time in nanoseconds that the event
+ * has been enabled (i.e. eligible to run, and the task has
+ * been scheduled in, if this is a per-task event)
+ * and running (scheduled onto the CPU), respectively.
+ *
+ * They are computed from tstamp_enabled, tstamp_running and
+ * tstamp_stopped when the event is in INACTIVE or ACTIVE state.
+ */
+ u64 total_time_enabled;
+ u64 total_time_running;
+
+ /*
+ * These are timestamps used for computing total_time_enabled
+ * and total_time_running when the event is in INACTIVE or
+ * ACTIVE state, measured in nanoseconds from an arbitrary point
+ * in time.
+ * tstamp_enabled: the notional time when the event was enabled
+ * tstamp_running: the notional time when the event was scheduled on
+ * tstamp_stopped: in INACTIVE state, the notional time when the
+ * event was scheduled off.
+ */
+ u64 tstamp_enabled;
+ u64 tstamp_running;
+ u64 tstamp_stopped;
+
+ /*
+ * timestamp shadows the actual context timing but it can
+ * be safely used in NMI interrupt context. It reflects the
+ * context time as it was when the event was last scheduled in.
+ *
+ * ctx_time already accounts for ctx->timestamp. Therefore to
+ * compute ctx_time for a sample, simply add perf_clock().
+ */
+ u64 shadow_ctx_time;
+
+ struct perf_event_attr attr;
+ u16 header_size;
+ u16 id_header_size;
+ u16 read_size;
+ struct hw_perf_event hw;
+
+ struct perf_event_context *ctx;
+ atomic_long_t refcount;
+
+ /*
+ * These accumulate total time (in nanoseconds) that children
+ * events have been enabled and running, respectively.
+ */
+ atomic64_t child_total_time_enabled;
+ atomic64_t child_total_time_running;
+
+ /*
+ * Protect attach/detach and child_list:
+ */
+ struct mutex child_mutex;
+ struct list_head child_list;
+ struct perf_event *parent;
+
+ int oncpu;
+ int cpu;
+
+ struct list_head owner_entry;
+ struct task_struct *owner;
+
+ /* mmap bits */
+ struct mutex mmap_mutex;
+ atomic_t mmap_count;
+
+ struct ring_buffer *rb;
+ struct list_head rb_entry;
+
+ /* poll related */
+ wait_queue_head_t waitq;
+ struct fasync_struct *fasync;
+
+ /* delayed work for NMIs and such */
+ int pending_wakeup;
+ int pending_kill;
+ int pending_disable;
+ struct irq_work pending;
+
+ atomic_t event_limit;
+
+ void (*destroy)(struct perf_event *);
+ struct rcu_head rcu_head;
+
+ struct pid_namespace *ns;
+ u64 id;
+
+ perf_overflow_handler_t overflow_handler;
+ void *overflow_handler_context;
+
+#ifdef CONFIG_EVENT_TRACING
+ struct ftrace_event_call *tp_event;
+ struct event_filter *filter;
+#ifdef CONFIG_FUNCTION_TRACER
+ struct ftrace_ops ftrace_ops;
+#endif
+#endif
+
+#ifdef CONFIG_CGROUP_PERF
+ struct perf_cgroup *cgrp; /* cgroup event is attach to */
+ int cgrp_defer_enabled;
+#endif
+
+#endif /* CONFIG_PERF_EVENTS */
+};
+
+enum perf_event_context_type {
+ task_context,
+ cpu_context,
+};
+
+/**
+ * struct perf_event_context - event context structure
+ *
+ * Used as a container for task events and CPU events as well:
+ */
+struct perf_event_context {
+ struct pmu *pmu;
+ enum perf_event_context_type type;
+ /*
+ * Protect the states of the events in the list,
+ * nr_active, and the list:
+ */
+ raw_spinlock_t lock;
+ /*
+ * Protect the list of events. Locking either mutex or lock
+ * is sufficient to ensure the list doesn't change; to change
+ * the list you need to lock both the mutex and the spinlock.
+ */
+ struct mutex mutex;
+
+ struct list_head pinned_groups;
+ struct list_head flexible_groups;
+ struct list_head event_list;
+ int nr_events;
+ int nr_active;
+ int is_active;
+ int nr_stat;
+ int nr_freq;
+ int rotate_disable;
+ atomic_t refcount;
+ struct task_struct *task;
+
+ /*
+ * Context clock, runs when context enabled.
+ */
+ u64 time;
+ u64 timestamp;
+
+ /*
+ * These fields let us detect when two contexts have both
+ * been cloned (inherited) from a common ancestor.
+ */
+ struct perf_event_context *parent_ctx;
+ u64 parent_gen;
+ u64 generation;
+ int pin_count;
+ int nr_cgroups; /* cgroup evts */
+ int nr_branch_stack; /* branch_stack evt */
+ struct rcu_head rcu_head;
+};
+
+/*
+ * Number of contexts where an event can trigger:
+ * task, softirq, hardirq, nmi.
+ */
+#define PERF_NR_CONTEXTS 4
+
+/**
+ * struct perf_event_cpu_context - per cpu event context structure
+ */
+struct perf_cpu_context {
+ struct perf_event_context ctx;
+ struct perf_event_context *task_ctx;
+ int active_oncpu;
+ int exclusive;
+ struct list_head rotation_list;
+ int jiffies_interval;
+ struct pmu *unique_pmu;
+ struct perf_cgroup *cgrp;
+};
+
+struct perf_output_handle {
+ struct perf_event *event;
+ struct ring_buffer *rb;
+ unsigned long wakeup;
+ unsigned long size;
+ void *addr;
+ int page;
+};
+
+#ifdef CONFIG_PERF_EVENTS
+
+extern int perf_pmu_register(struct pmu *pmu, char *name, int type);
+extern void perf_pmu_unregister(struct pmu *pmu);
+
+extern int perf_num_counters(void);
+extern const char *perf_pmu_name(void);
+extern void __perf_event_task_sched_in(struct task_struct *prev,
+ struct task_struct *task);
+extern void __perf_event_task_sched_out(struct task_struct *prev,
+ struct task_struct *next);
+extern int perf_event_init_task(struct task_struct *child);
+extern void perf_event_exit_task(struct task_struct *child);
+extern void perf_event_free_task(struct task_struct *task);
+extern void perf_event_delayed_put(struct task_struct *task);
+extern void perf_event_print_debug(void);
+extern void perf_pmu_disable(struct pmu *pmu);
+extern void perf_pmu_enable(struct pmu *pmu);
+extern int perf_event_task_disable(void);
+extern int perf_event_task_enable(void);
+extern int perf_event_refresh(struct perf_event *event, int refresh);
+extern void perf_event_update_userpage(struct perf_event *event);
+extern int perf_event_release_kernel(struct perf_event *event);
+extern struct perf_event *
+perf_event_create_kernel_counter(struct perf_event_attr *attr,
+ int cpu,
+ struct task_struct *task,
+ perf_overflow_handler_t callback,
+ void *context);
+extern void perf_pmu_migrate_context(struct pmu *pmu,
+ int src_cpu, int dst_cpu);
+extern u64 perf_event_read_value(struct perf_event *event,
+ u64 *enabled, u64 *running);
+
+
+struct perf_sample_data {
+ u64 type;
+
+ u64 ip;
+ struct {
+ u32 pid;
+ u32 tid;
+ } tid_entry;
+ u64 time;
+ u64 addr;
+ u64 id;
+ u64 stream_id;
+ struct {
+ u32 cpu;
+ u32 reserved;
+ } cpu_entry;
+ u64 period;
+ union perf_mem_data_src data_src;
+ struct perf_callchain_entry *callchain;
+ struct perf_raw_record *raw;
+ struct perf_branch_stack *br_stack;
+ struct perf_regs_user regs_user;
+ u64 stack_user_size;
+ u64 weight;
+};
+
+static inline void perf_sample_data_init(struct perf_sample_data *data,
+ u64 addr, u64 period)
+{
+ /* remaining struct members initialized in perf_prepare_sample() */
+ data->addr = addr;
+ data->raw = NULL;
+ data->br_stack = NULL;
+ data->period = period;
+ data->regs_user.abi = PERF_SAMPLE_REGS_ABI_NONE;
+ data->regs_user.regs = NULL;
+ data->stack_user_size = 0;
+ data->weight = 0;
+ data->data_src.val = 0;
+}
+
+extern void perf_output_sample(struct perf_output_handle *handle,
+ struct perf_event_header *header,
+ struct perf_sample_data *data,
+ struct perf_event *event);
+extern void perf_prepare_sample(struct perf_event_header *header,
+ struct perf_sample_data *data,
+ struct perf_event *event,
+ struct pt_regs *regs);
+
+extern int perf_event_overflow(struct perf_event *event,
+ struct perf_sample_data *data,
+ struct pt_regs *regs);
+
+static inline bool is_sampling_event(struct perf_event *event)
+{
+ return event->attr.sample_period != 0;
+}
+
+/*
+ * Return 1 for a software event, 0 for a hardware event
+ */
+static inline int is_software_event(struct perf_event *event)
+{
+ return event->pmu->task_ctx_nr == perf_sw_context;
+}
+
+extern struct static_key perf_swevent_enabled[PERF_COUNT_SW_MAX];
+
+extern void __perf_sw_event(u32, u64, struct pt_regs *, u64);
+
+#ifndef perf_arch_fetch_caller_regs
+static inline void perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip) { }
+#endif
+
+/*
+ * Take a snapshot of the regs. Skip ip and frame pointer to
+ * the nth caller. We only need a few of the regs:
+ * - ip for PERF_SAMPLE_IP
+ * - cs for user_mode() tests
+ * - bp for callchains
+ * - eflags, for future purposes, just in case
+ */
+static inline void perf_fetch_caller_regs(struct pt_regs *regs)
+{
+ memset(regs, 0, sizeof(*regs));
+
+ perf_arch_fetch_caller_regs(regs, CALLER_ADDR0);
+}
+
+static __always_inline void
+perf_sw_event(u32 event_id, u64 nr, struct pt_regs *regs, u64 addr)
+{
+ struct pt_regs hot_regs;
+
+ if (static_key_false(&perf_swevent_enabled[event_id])) {
+ if (!regs) {
+ perf_fetch_caller_regs(&hot_regs);
+ regs = &hot_regs;
+ }
+ __perf_sw_event(event_id, nr, regs, addr);
+ }
+}
+
+extern struct static_key_deferred perf_sched_events;
+
+static inline void perf_event_task_sched_in(struct task_struct *prev,
+ struct task_struct *task)
+{
+ if (static_key_false(&perf_sched_events.key))
+ __perf_event_task_sched_in(prev, task);
+}
+
+static inline void perf_event_task_sched_out(struct task_struct *prev,
+ struct task_struct *next)
+{
+ perf_sw_event(PERF_COUNT_SW_CONTEXT_SWITCHES, 1, NULL, 0);
+
+ if (static_key_false(&perf_sched_events.key))
+ __perf_event_task_sched_out(prev, next);
+}
+
+extern void perf_event_mmap(struct vm_area_struct *vma);
+extern struct perf_guest_info_callbacks *perf_guest_cbs;
+extern int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
+extern int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
+
+extern void perf_event_comm(struct task_struct *tsk);
+extern void perf_event_fork(struct task_struct *tsk);
+
+/* Callchains */
+DECLARE_PER_CPU(struct perf_callchain_entry, perf_callchain_entry);
+
+extern void perf_callchain_user(struct perf_callchain_entry *entry, struct pt_regs *regs);
+extern void perf_callchain_kernel(struct perf_callchain_entry *entry, struct pt_regs *regs);
+
+static inline void perf_callchain_store(struct perf_callchain_entry *entry, u64 ip)
+{
+ if (entry->nr < PERF_MAX_STACK_DEPTH)
+ entry->ip[entry->nr++] = ip;
+}
+
+extern int sysctl_perf_event_paranoid;
+extern int sysctl_perf_event_mlock;
+extern int sysctl_perf_event_sample_rate;
+extern int sysctl_perf_cpu_time_max_percent;
+
+extern void perf_sample_event_took(u64 sample_len_ns);
+
+extern int perf_proc_update_handler(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp,
+ loff_t *ppos);
+extern int perf_cpu_time_max_percent_handler(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp,
+ loff_t *ppos);
+
+
+static inline bool perf_paranoid_tracepoint_raw(void)
+{
+ return sysctl_perf_event_paranoid > -1;
+}
+
+static inline bool perf_paranoid_cpu(void)
+{
+ return sysctl_perf_event_paranoid > 0;
+}
+
+static inline bool perf_paranoid_kernel(void)
+{
+ return sysctl_perf_event_paranoid > 1;
+}
+
+extern void perf_event_init(void);
+extern void perf_tp_event(u64 addr, u64 count, void *record,
+ int entry_size, struct pt_regs *regs,
+ struct hlist_head *head, int rctx,
+ struct task_struct *task);
+extern void perf_bp_event(struct perf_event *event, void *data);
+
+#ifndef perf_misc_flags
+# define perf_misc_flags(regs) \
+ (user_mode(regs) ? PERF_RECORD_MISC_USER : PERF_RECORD_MISC_KERNEL)
+# define perf_instruction_pointer(regs) instruction_pointer(regs)
+#endif
+
+static inline bool has_branch_stack(struct perf_event *event)
+{
+ return event->attr.sample_type & PERF_SAMPLE_BRANCH_STACK;
+}
+
+extern int perf_output_begin(struct perf_output_handle *handle,
+ struct perf_event *event, unsigned int size);
+extern void perf_output_end(struct perf_output_handle *handle);
+extern unsigned int perf_output_copy(struct perf_output_handle *handle,
+ const void *buf, unsigned int len);
+extern unsigned int perf_output_skip(struct perf_output_handle *handle,
+ unsigned int len);
+extern int perf_swevent_get_recursion_context(void);
+extern void perf_swevent_put_recursion_context(int rctx);
+extern void perf_event_enable(struct perf_event *event);
+extern void perf_event_disable(struct perf_event *event);
+extern int __perf_event_disable(void *info);
+extern void perf_event_task_tick(void);
+#else
+static inline void
+perf_event_task_sched_in(struct task_struct *prev,
+ struct task_struct *task) { }
+static inline void
+perf_event_task_sched_out(struct task_struct *prev,
+ struct task_struct *next) { }
+static inline int perf_event_init_task(struct task_struct *child) { return 0; }
+static inline void perf_event_exit_task(struct task_struct *child) { }
+static inline void perf_event_free_task(struct task_struct *task) { }
+static inline void perf_event_delayed_put(struct task_struct *task) { }
+static inline void perf_event_print_debug(void) { }
+static inline int perf_event_task_disable(void) { return -EINVAL; }
+static inline int perf_event_task_enable(void) { return -EINVAL; }
+static inline int perf_event_refresh(struct perf_event *event, int refresh)
+{
+ return -EINVAL;
+}
+
+static inline void
+perf_sw_event(u32 event_id, u64 nr, struct pt_regs *regs, u64 addr) { }
+static inline void
+perf_bp_event(struct perf_event *event, void *data) { }
+
+static inline int perf_register_guest_info_callbacks
+(struct perf_guest_info_callbacks *callbacks) { return 0; }
+static inline int perf_unregister_guest_info_callbacks
+(struct perf_guest_info_callbacks *callbacks) { return 0; }
+
+static inline void perf_event_mmap(struct vm_area_struct *vma) { }
+static inline void perf_event_comm(struct task_struct *tsk) { }
+static inline void perf_event_fork(struct task_struct *tsk) { }
+static inline void perf_event_init(void) { }
+static inline int perf_swevent_get_recursion_context(void) { return -1; }
+static inline void perf_swevent_put_recursion_context(int rctx) { }
+static inline void perf_event_enable(struct perf_event *event) { }
+static inline void perf_event_disable(struct perf_event *event) { }
+static inline int __perf_event_disable(void *info) { return -1; }
+static inline void perf_event_task_tick(void) { }
+#endif
+
+#if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_NO_HZ_FULL)
+extern bool perf_event_can_stop_tick(void);
+#else
+static inline bool perf_event_can_stop_tick(void) { return true; }
+#endif
+
+#if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_CPU_SUP_INTEL)
+extern void perf_restore_debug_store(void);
+#else
+static inline void perf_restore_debug_store(void) { }
+#endif
+
+#define perf_output_put(handle, x) perf_output_copy((handle), &(x), sizeof(x))
+
+/*
+ * This has to have a higher priority than migration_notifier in sched.c.
+ */
+#define perf_cpu_notifier(fn) \
+do { \
+ static struct notifier_block fn##_nb __cpuinitdata = \
+ { .notifier_call = fn, .priority = CPU_PRI_PERF }; \
+ unsigned long cpu = smp_processor_id(); \
+ unsigned long flags; \
+ fn(&fn##_nb, (unsigned long)CPU_UP_PREPARE, \
+ (void *)(unsigned long)cpu); \
+ local_irq_save(flags); \
+ fn(&fn##_nb, (unsigned long)CPU_STARTING, \
+ (void *)(unsigned long)cpu); \
+ local_irq_restore(flags); \
+ fn(&fn##_nb, (unsigned long)CPU_ONLINE, \
+ (void *)(unsigned long)cpu); \
+ register_cpu_notifier(&fn##_nb); \
+} while (0)
+
+
+struct perf_pmu_events_attr {
+ struct device_attribute attr;
+ u64 id;
+ const char *event_str;
+};
+
+#define PMU_EVENT_ATTR(_name, _var, _id, _show) \
+static struct perf_pmu_events_attr _var = { \
+ .attr = __ATTR(_name, 0444, _show, NULL), \
+ .id = _id, \
+};
+
+#define PMU_FORMAT_ATTR(_name, _format) \
+static ssize_t \
+_name##_show(struct device *dev, \
+ struct device_attribute *attr, \
+ char *page) \
+{ \
+ BUILD_BUG_ON(sizeof(_format) >= PAGE_SIZE); \
+ return sprintf(page, _format "\n"); \
+} \
+ \
+static struct device_attribute format_attr_##_name = __ATTR_RO(_name)
+
+#endif /* _LINUX_PERF_EVENT_H */
generated by cgit v1.2.3 (git 2.39.1) at 2026-03-14 17:14:31 +0000