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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>
#include <uapi/linux/bpf_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/jump_label_ratelimit.h>
#include <linux/atomic.h>
#include <linux/sysfs.h>
#include <linux/perf_regs.h>
#include <linux/workqueue.h>
#ifndef __GENKSYMS__
#include <linux/cgroup.h>
#endif
#include <asm/local.h>
#include <linux/rh_kabi.h>
struct perf_callchain_entry {
__u64 nr;
__u64 ip[PERF_MAX_STACK_DEPTH];
};
typedef unsigned long (*perf_copy_f)(void *dst, const void *src,
unsigned long off, unsigned long len);
struct perf_raw_frag {
union {
struct perf_raw_frag *next;
unsigned long pad;
};
perf_copy_f copy;
void *data;
u32 size;
} __packed;
struct perf_raw_record {
u32 size;
RH_KABI_DEPRECATE(void *, data)
RH_KABI_EXTEND(struct perf_raw_frag frag)
};
/*
* 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 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 event_constraint;
/**
* 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 */
RH_KABI_DEPRECATE(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.
*/
RH_KABI_DEPRECATE(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;
RH_KABI_EXTEND(struct event_constraint *constraint)
RH_KABI_EXTEND(struct task_struct *target)
/*
* PMU would store hardware filter configuration
* here.
*/
RH_KABI_EXTEND(void *addr_filters)
/* Last sync'ed generation of filters */
RH_KABI_EXTEND(unsigned long addr_filters_gen)
#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_PMU_TXN_ADD 0x1 /* txn to add/schedule event on PMU */
#define PERF_PMU_TXN_READ 0x2 /* txn to read event group from PMU */
/**
* pmu::capabilities flags
*/
#define PERF_PMU_CAP_NO_INTERRUPT 0x01
#define PERF_PMU_CAP_NO_NMI 0x02
#define PERF_PMU_CAP_AUX_NO_SG 0x04
#define PERF_PMU_CAP_AUX_SW_DOUBLEBUF 0x08
#define PERF_PMU_CAP_EXCLUSIVE 0x10
#define PERF_PMU_CAP_ITRACE 0x20
/**
* struct pmu - generic performance monitoring unit
*/
struct pmu {
struct list_head entry;
struct device *dev;
const struct attribute_group **attr_groups;
const char *name;
int type;
int * __percpu pmu_disable_count;
struct perf_cpu_context * __percpu pmu_cpu_context;
int task_ctx_nr;
int hrtimer_interval_ms;
/*
* 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.
*
* Optional.
*/
RH_KABI_REPLACE(void (*start_txn)(struct pmu *pmu),
void (*start_txn)(struct pmu *pmu, unsigned int txn_flags))
/*
* 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.
*
* Optional.
*/
int (*commit_txn) (struct pmu *pmu);
/*
* Will cancel the transaction, assumes ->del() is called
* for each successful ->add() during the transaction.
*
* Optional.
*/
void (*cancel_txn) (struct pmu *pmu);
/*
* 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)
*/
#ifdef __GENKSYMS__
void (*flush_branch_stack) (void);
#else
/* KABI this pointer is deprecated */
void (*rh_reserved_flush_branch_stack) (void);
#endif
RH_KABI_EXTEND(struct module *module)
/*
* various common per-pmu feature flags
*/
RH_KABI_EXTEND(int capabilities)
/*
* context-switches callback
*/
RH_KABI_EXTEND(void (*sched_task) (struct perf_event_context *ctx, bool sched_in))
/*
* PMU specific data size
*/
RH_KABI_EXTEND(size_t task_ctx_size)
/*
* Set up pmu-private data structures for an AUX area
*/
RH_KABI_EXTEND(void *(*setup_aux) (int cpu, void **pages,
int nr_pages, bool overwrite))
/* optional */
/*
* Free pmu-private AUX data structures
*/
RH_KABI_EXTEND(void (*free_aux) (void *aux)) /* optional */
RH_KABI_EXTEND(atomic_t exclusive_cnt) /* < 0: cpu; > 0: tsk */
/*
* Validate address range filters: make sure the HW supports the
* requested configuration and number of filters; return 0 if the
* supplied filters are valid, -errno otherwise.
*
* Runs in the context of the ioctl()ing process and is not serialized
* with the rest of the PMU callbacks.
*/
RH_KABI_EXTEND(int (*addr_filters_validate) (struct list_head *filters))
/*
* Synchronize address range filter configuration:
* translate hw-agnostic filters into hardware configuration in
* event::hw::addr_filters.
*
* Runs as a part of filter sync sequence that is done in ->start()
* callback by calling perf_event_addr_filters_sync().
*
* May (and should) traverse event::addr_filters::list, for which its
* caller provides necessary serialization.
*/
RH_KABI_EXTEND(void (*addr_filters_sync) (struct perf_event *event))
/* optional */
/* number of address filters this PMU can do */
RH_KABI_EXTEND(unsigned int nr_addr_filters)
};
/**
* struct perf_addr_filter - address range filter definition
* @entry: event's filter list linkage
* @inode: object file's inode for file-based filters
* @offset: filter range offset
* @size: filter range size
* @range: 1: range, 0: address
* @filter: 1: filter/start, 0: stop
*
* This is a hardware-agnostic filter configuration as specified by the user.
*/
struct perf_addr_filter {
struct list_head entry;
struct inode *inode;
unsigned long offset;
unsigned long size;
unsigned int range : 1,
filter : 1;
};
/**
* struct perf_addr_filters_head - container for address range filters
* @list: list of filters for this event
* @lock: spinlock that serializes accesses to the @list and event's
* (and its children's) filter generations.
* @nr_file_filters: number of file-based filters
*
* A child event will use parent's @list (and therefore @lock), so they are
* bundled together; see perf_event_addr_filters().
*/
struct perf_addr_filters_head {
struct list_head list;
raw_spinlock_t lock;
unsigned int nr_file_filters;
};
/**
* enum perf_event_active_state - the states of a event
*/
enum perf_event_active_state {
#ifndef __GENKSYMS__
PERF_EVENT_STATE_DEAD = -4,
PERF_EVENT_STATE_EXIT = -3,
#endif
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);
/*
* Event capabilities. For event_caps and groups caps.
*
* PERF_EV_CAP_SOFTWARE: Is a software event.
* PERF_EV_CAP_READ_ACTIVE_PKG: A CPU event (or cgroup event) that can be read
* from any CPU in the package where it is active.
*/
#define PERF_EV_CAP_SOFTWARE BIT(0)
#define PERF_EV_CAP_READ_ACTIVE_PKG BIT(1)
#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
#define PERF_ATTACH_TASK_DATA 0x08
#define PERF_ATTACH_ITRACE 0x10
struct perf_cgroup;
struct ring_buffer;
struct pmu_event_list {
raw_spinlock_t lock;
struct list_head list;
};
/**
* struct perf_event - performance event kernel representation:
*/
struct perf_event {
#ifdef CONFIG_PERF_EVENTS
/*
* XXX: group_entry and sibling_list should be mutually exclusive;
* either you're a sibling on a group, or you're the group leader.
* Rework the code to always use the same list element.
*
* Locked for modification by both ctx->mutex and ctx->lock; holding
* either sufficies for read.
*/
struct list_head group_entry;
/*
* entry onto perf_event_context::event_list;
* modifications require ctx->lock
* RCU safe iterations.
*/
struct list_head event_entry;
struct list_head sibling_list;
struct hlist_node hlist_entry;
int nr_siblings;
/* Not serialized. Only written during event initialization. */
RH_KABI_RENAME(int group_flags, int event_caps);
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.
*/
u64 total_time_enabled;
u64 total_time_running;
RH_KABI_DEPRECATE(u64, tstamp_enabled)
RH_KABI_DEPRECATE(u64, tstamp_running)
RH_KABI_REPLACE(u64 tstamp_stopped,
u64 tstamp)
/*
* 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;
#if defined(CONFIG_FUNCTION_TRACER) && defined(CONFIG_X86_64)
struct ftrace_ops ftrace_ops;
#endif
#endif
#ifdef CONFIG_CGROUP_PERF
struct perf_cgroup *cgrp; /* cgroup event is attach to */
RH_KABI_DEPRECATE(int, cgrp_defer_enabled)
#endif
/*
* We need storage to track the entries in perf_pmu_migrate_context; we
* cannot use the event_entry because of RCU and we want to keep the
* group in tact which avoids us using the other two entries.
*/
RH_KABI_EXTEND(struct list_head migrate_entry)
RH_KABI_EXTEND(struct list_head active_entry)
RH_KABI_EXTEND(void *pmu_private)
#if defined(CONFIG_FUNCTION_TRACER) && !defined(CONFIG_X86_64)
RH_KABI_EXTEND(struct ftrace_ops ftrace_ops)
#endif
/* address range filters */
RH_KABI_EXTEND(struct perf_addr_filters_head addr_filters)
/* vma address array for file-based filders */
RH_KABI_EXTEND(unsigned long *addr_filters_offs)
RH_KABI_EXTEND(unsigned long addr_filters_gen)
RH_KABI_EXTEND(struct list_head sb_list)
RH_KABI_EXTEND(u64 (*clock)(void))
/* The cumulative AND of all event_caps for events in this group. */
RH_KABI_EXTEND(int group_caps)
/*
* Node on the pinned or flexible tree located at the event context;
*/
RH_KABI_EXTEND(struct rb_node group_node)
RH_KABI_EXTEND(u64 group_index)
RH_KABI_EXTEND(struct list_head active_list)
#ifdef CONFIG_BPF_SYSCALL
RH_KABI_EXTEND(perf_overflow_handler_t orig_overflow_handler)
RH_KABI_EXTEND(struct bpf_prog *prog)
#endif
#endif /* CONFIG_PERF_EVENTS */
};
enum perf_event_context_type {
task_context,
cpu_context,
};
struct perf_event_groups {
struct rb_root tree;
u64 index;
};
/**
* 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;
RH_KABI_DEPRECATE(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;
RH_KABI_DEPRECATE(struct list_head, pinned_groups)
RH_KABI_DEPRECATE(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 */
RH_KABI_DEPRECATE(int, nr_branch_stack)
struct rcu_head rcu_head;
RH_KABI_EXTEND(struct list_head active_ctx_list)
RH_KABI_EXTEND(void *task_ctx_data) /* pmu specific data */
RH_KABI_EXTEND(struct perf_event_groups pinned_groups)
RH_KABI_EXTEND(struct perf_event_groups flexible_groups)
RH_KABI_EXTEND(struct list_head pinned_active)
RH_KABI_EXTEND(struct list_head flexible_active)
};
/*
* 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 hrtimer hrtimer;
ktime_t hrtimer_interval;
RH_KABI_DEPRECATE(struct list_head, rotation_list)
struct pmu *unique_pmu;
struct perf_cgroup *cgrp;
RH_KABI_EXTEND(raw_spinlock_t hrtimer_lock)
RH_KABI_EXTEND(unsigned int hrtimer_active)
};
struct perf_output_handle {
struct perf_event *event;
struct ring_buffer *rb;
unsigned long wakeup;
unsigned long size;
u64 aux_flags;
union {
void *addr;
unsigned long head;
};
int page;
};
struct bpf_perf_event_data_kern {
bpf_user_pt_regs_t *regs;
struct perf_sample_data *data;
struct perf_event *event;
};
#ifdef CONFIG_CGROUP_PERF
#ifndef __GENKSYMS__
/*
* perf_cgroup_info keeps track of time_enabled for a cgroup.
* This is a per-cpu dynamically allocated data structure.
*/
struct perf_cgroup_info {
u64 time;
u64 timestamp;
};
struct perf_cgroup {
struct cgroup_subsys_state css;
struct perf_cgroup_info __percpu *info;
};
#endif /* __GENKSYMS__ */
/*
* Must ensure cgroup is pinned (css_get) before calling
* this function. In other words, we cannot call this function
* if there is no cgroup event for the current CPU context.
*/
static inline struct perf_cgroup *
perf_cgroup_from_task(struct task_struct *task)
{
return container_of(task_subsys_state(task, perf_subsys_id),
struct perf_cgroup, css);
}
#endif /* CONFIG_CGROUP_PERF */
#ifdef CONFIG_PERF_EVENTS
extern void *perf_aux_output_begin(struct perf_output_handle *handle,
struct perf_event *event);
extern void perf_aux_output_end(struct perf_output_handle *handle,
unsigned long size);
extern int perf_aux_output_skip(struct perf_output_handle *handle,
unsigned long size);
extern void *perf_get_aux(struct perf_output_handle *handle);
extern void perf_aux_output_flag(struct perf_output_handle *handle, u64 flags);
extern void perf_event_itrace_started(struct perf_event *event);
extern int perf_pmu_register(struct pmu *pmu, const 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 struct file *perf_event_get(unsigned int fd);
extern const struct perf_event_attr *perf_event_attrs(struct perf_event *event);
extern void perf_event_print_debug(void);
extern void perf_pmu_disable(struct pmu *pmu);
extern void perf_pmu_enable(struct pmu *pmu);
extern void perf_sched_cb_dec(struct pmu *pmu);
extern void perf_sched_cb_inc(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);
int perf_event_read_local(struct perf_event *event, u64 *value,
u64 *enabled, u64 *running);
extern u64 perf_event_read_value(struct perf_event *event,
u64 *enabled, u64 *running);
struct perf_regs_user {
__u64 abi;
struct pt_regs *regs;
};
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;
RH_KABI_REPLACE(struct perf_regs_user regs_user,
struct perf_regs regs_user)
u64 stack_user_size;
u64 weight;
/*
* Transaction flags for abort events:
*/
RH_KABI_EXTEND(u64 txn)
RH_KABI_EXTEND(struct perf_regs regs_intr)
/*
* regs_user may point to task_pt_regs or to regs_user_copy, depending
* on arch details.
*/
RH_KABI_EXTEND(struct pt_regs regs_user_copy)
RH_KABI_EXTEND(u64 phys_addr)
} ____cacheline_aligned;
/* default value for data source */
#define PERF_MEM_NA (PERF_MEM_S(OP, NA) |\
PERF_MEM_S(LVL, NA) |\
PERF_MEM_S(SNOOP, NA) |\
PERF_MEM_S(LOCK, NA) |\
PERF_MEM_S(TLB, NA))
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->weight = 0;
data->data_src.val = PERF_MEM_NA;
data->txn = 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);
extern void perf_event_output_forward(struct perf_event *event,
struct perf_sample_data *data,
struct pt_regs *regs);
extern void perf_event_output_backward(struct perf_event *event,
struct perf_sample_data *data,
struct pt_regs *regs);
extern void perf_event_output(struct perf_event *event,
struct perf_sample_data *data,
struct pt_regs *regs);
static inline bool
is_default_overflow_handler(struct perf_event *event)
{
if (likely(event->overflow_handler == perf_event_output_forward))
return true;
if (unlikely(event->overflow_handler == perf_event_output_backward))
return true;
return false;
}
extern void
perf_event_header__init_id(struct perf_event_header *header,
struct perf_sample_data *data,
struct perf_event *event);
extern void
perf_event__output_id_sample(struct perf_event *event,
struct perf_output_handle *handle,
struct perf_sample_data *sample);
extern void
perf_log_lost_samples(struct perf_event *event, u64 lost);
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->event_caps & PERF_EV_CAP_SOFTWARE;
}
extern struct static_key perf_swevent_enabled[PERF_COUNT_SW_MAX];
extern void ___perf_sw_event(u32, u64, struct pt_regs *, u64);
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)
{
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)
{
if (static_key_false(&perf_swevent_enabled[event_id]))
__perf_sw_event(event_id, nr, regs, addr);
}
DECLARE_PER_CPU(struct pt_regs, __perf_regs[4]);
/*
* 'Special' version for the scheduler, it hard assumes no recursion,
* which is guaranteed by us not actually scheduling inside other swevents
* because those disable preemption.
*/
static __always_inline void
perf_sw_event_sched(u32 event_id, u64 nr, u64 addr)
{
if (static_key_false(&perf_swevent_enabled[event_id])) {
struct pt_regs *regs = this_cpu_ptr(&__perf_regs[0]);
perf_fetch_caller_regs(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_sched(PERF_COUNT_SW_CONTEXT_SWITCHES, 1, 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_exec(void);
extern void perf_event_comm(struct task_struct *tsk, bool exec);
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);
extern struct perf_callchain_entry *
get_perf_callchain(struct pt_regs *regs, u32 init_nr, bool kernel, bool user,
bool crosstask, bool add_mark);
extern int get_callchain_buffers(void);
extern void put_callchain_buffers(void);
static inline int perf_callchain_store(struct perf_callchain_entry *entry, u64 ip)
{
if (entry->nr < PERF_MAX_STACK_DEPTH) {
entry->ip[entry->nr++] = ip;
return 0;
} else {
return -1; /* no more room, stop walking the stack */
}
}
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
#ifndef perf_arch_bpf_user_pt_regs
# define perf_arch_bpf_user_pt_regs(regs) regs
#endif
static inline bool has_branch_stack(struct perf_event *event)
{
return event->attr.sample_type & PERF_SAMPLE_BRANCH_STACK;
}
static inline bool needs_branch_stack(struct perf_event *event)
{
return event->attr.branch_sample_type != 0;
}
static inline bool has_aux(struct perf_event *event)
{
return event->pmu->setup_aux;
}
static inline bool is_write_backward(struct perf_event *event)
{
return !!event->attr.write_backward;
}
static inline bool has_addr_filter(struct perf_event *event)
{
return event->pmu->nr_addr_filters;
}
/*
* An inherited event uses parent's filters
*/
static inline struct perf_addr_filters_head *
perf_event_addr_filters(struct perf_event *event)
{
struct perf_addr_filters_head *ifh = &event->addr_filters;
if (event->parent)
ifh = &event->parent->addr_filters;
return ifh;
}
extern void perf_event_addr_filters_sync(struct perf_event *event);
extern int perf_output_begin(struct perf_output_handle *handle,
struct perf_event *event, unsigned int size);
extern int perf_output_begin_forward(struct perf_output_handle *handle,
struct perf_event *event,
unsigned int size);
extern int perf_output_begin_backward(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 u64 perf_swevent_set_period(struct perf_event *event);
extern void perf_event_enable(struct perf_event *event);
extern void perf_event_disable(struct perf_event *event);
extern void perf_event_disable_local(struct perf_event *event);
extern void perf_event_disable_inatomic(struct perf_event *event);
extern void perf_event_task_tick(void);
extern int perf_event_account_interrupt(struct perf_event *event);
#else /* !CONFIG_PERF_EVENTS: */
static inline void *
perf_aux_output_begin(struct perf_output_handle *handle,
struct perf_event *event) { return NULL; }
static inline void
perf_aux_output_end(struct perf_output_handle *handle, unsigned long size)
{ }
static inline int
perf_aux_output_skip(struct perf_output_handle *handle,
unsigned long size) { return -EINVAL; }
static inline void *
perf_get_aux(struct perf_output_handle *handle) { return NULL; }
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 struct file *perf_event_get(unsigned int fd) { return ERR_PTR(-EINVAL); }
static inline const struct perf_event_attr *perf_event_attrs(struct perf_event *event)
{
return ERR_PTR(-EINVAL);
}
static inline int perf_event_read_local(struct perf_event *event, u64 *value,
u64 *enabled, u64 *running)
{
return -EINVAL;
}
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_sw_event_sched(u32 event_id, u64 nr, 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_exec(void) { }
static inline void perf_event_comm(struct task_struct *tsk, bool exec) { }
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 u64 perf_swevent_set_period(struct perf_event *event) { return 0; }
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) { }
static inline int perf_event_release_kernel(struct perf_event *event) { return 0; }
#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
static __always_inline bool perf_raw_frag_last(const struct perf_raw_frag *frag)
{
return frag->pad < sizeof(u64);
}
#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 = \
{ .notifier_call = fn, .priority = CPU_PRI_PERF }; \
unsigned long cpu = smp_processor_id(); \
unsigned long flags; \
\
cpu_notifier_register_begin(); \
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); \
cpu_notifier_register_done(); \
} while (0)
/*
* Bare-bones version of perf_cpu_notifier(), which doesn't invoke the
* callback for already online CPUs.
*/
#define __perf_cpu_notifier(fn) \
do { \
static struct notifier_block fn##_nb = \
{ .notifier_call = fn, .priority = CPU_PRI_PERF }; \
\
__register_cpu_notifier(&fn##_nb); \
} while (0)
struct perf_pmu_events_attr {
struct device_attribute attr;
u64 id;
const char *event_str;
};
ssize_t perf_event_sysfs_show(struct device *dev, struct device_attribute *attr,
char *page);
#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_EVENT_ATTR_STRING(_name, _var, _str) \
static struct perf_pmu_events_attr _var = { \
.attr = __ATTR(_name, 0444, perf_event_sysfs_show, NULL), \
.id = 0, \
.event_str = _str, \
};
#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 */
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