| /* |
| * Performance events: |
| * |
| * Copyright (C) 2008-2009, Thomas Gleixner <tglx@linutronix.de> |
| * Copyright (C) 2008-2009, Red Hat, Inc., Ingo Molnar |
| * Copyright (C) 2008-2009, 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 <linux/types.h> |
| #include <linux/ioctl.h> |
| #include <asm/byteorder.h> |
| |
| /* |
| * User-space ABI bits: |
| */ |
| |
| /* |
| * attr.type |
| */ |
| enum perf_type_id { |
| PERF_TYPE_HARDWARE = 0, |
| PERF_TYPE_SOFTWARE = 1, |
| PERF_TYPE_TRACEPOINT = 2, |
| PERF_TYPE_HW_CACHE = 3, |
| PERF_TYPE_RAW = 4, |
| PERF_TYPE_BREAKPOINT = 5, |
| |
| PERF_TYPE_MAX, /* non-ABI */ |
| }; |
| |
| /* |
| * Generalized performance event event_id types, used by the |
| * attr.event_id parameter of the sys_perf_event_open() |
| * syscall: |
| */ |
| enum perf_hw_id { |
| /* |
| * Common hardware events, generalized by the kernel: |
| */ |
| PERF_COUNT_HW_CPU_CYCLES = 0, |
| PERF_COUNT_HW_INSTRUCTIONS = 1, |
| PERF_COUNT_HW_CACHE_REFERENCES = 2, |
| PERF_COUNT_HW_CACHE_MISSES = 3, |
| PERF_COUNT_HW_BRANCH_INSTRUCTIONS = 4, |
| PERF_COUNT_HW_BRANCH_MISSES = 5, |
| PERF_COUNT_HW_BUS_CYCLES = 6, |
| |
| PERF_COUNT_HW_MAX, /* non-ABI */ |
| }; |
| |
| /* |
| * Generalized hardware cache events: |
| * |
| * { L1-D, L1-I, LLC, ITLB, DTLB, BPU } x |
| * { read, write, prefetch } x |
| * { accesses, misses } |
| */ |
| enum perf_hw_cache_id { |
| PERF_COUNT_HW_CACHE_L1D = 0, |
| PERF_COUNT_HW_CACHE_L1I = 1, |
| PERF_COUNT_HW_CACHE_LL = 2, |
| PERF_COUNT_HW_CACHE_DTLB = 3, |
| PERF_COUNT_HW_CACHE_ITLB = 4, |
| PERF_COUNT_HW_CACHE_BPU = 5, |
| |
| PERF_COUNT_HW_CACHE_MAX, /* non-ABI */ |
| }; |
| |
| enum perf_hw_cache_op_id { |
| PERF_COUNT_HW_CACHE_OP_READ = 0, |
| PERF_COUNT_HW_CACHE_OP_WRITE = 1, |
| PERF_COUNT_HW_CACHE_OP_PREFETCH = 2, |
| |
| PERF_COUNT_HW_CACHE_OP_MAX, /* non-ABI */ |
| }; |
| |
| enum perf_hw_cache_op_result_id { |
| PERF_COUNT_HW_CACHE_RESULT_ACCESS = 0, |
| PERF_COUNT_HW_CACHE_RESULT_MISS = 1, |
| |
| PERF_COUNT_HW_CACHE_RESULT_MAX, /* non-ABI */ |
| }; |
| |
| /* |
| * Special "software" events provided by the kernel, even if the hardware |
| * does not support performance events. These events measure various |
| * physical and sw events of the kernel (and allow the profiling of them as |
| * well): |
| */ |
| enum perf_sw_ids { |
| PERF_COUNT_SW_CPU_CLOCK = 0, |
| PERF_COUNT_SW_TASK_CLOCK = 1, |
| PERF_COUNT_SW_PAGE_FAULTS = 2, |
| PERF_COUNT_SW_CONTEXT_SWITCHES = 3, |
| PERF_COUNT_SW_CPU_MIGRATIONS = 4, |
| PERF_COUNT_SW_PAGE_FAULTS_MIN = 5, |
| PERF_COUNT_SW_PAGE_FAULTS_MAJ = 6, |
| PERF_COUNT_SW_ALIGNMENT_FAULTS = 7, |
| PERF_COUNT_SW_EMULATION_FAULTS = 8, |
| |
| PERF_COUNT_SW_MAX, /* non-ABI */ |
| }; |
| |
| /* |
| * Bits that can be set in attr.sample_type to request information |
| * in the overflow packets. |
| */ |
| enum perf_event_sample_format { |
| PERF_SAMPLE_IP = 1U << 0, |
| PERF_SAMPLE_TID = 1U << 1, |
| PERF_SAMPLE_TIME = 1U << 2, |
| PERF_SAMPLE_ADDR = 1U << 3, |
| PERF_SAMPLE_READ = 1U << 4, |
| PERF_SAMPLE_CALLCHAIN = 1U << 5, |
| PERF_SAMPLE_ID = 1U << 6, |
| PERF_SAMPLE_CPU = 1U << 7, |
| PERF_SAMPLE_PERIOD = 1U << 8, |
| PERF_SAMPLE_STREAM_ID = 1U << 9, |
| PERF_SAMPLE_RAW = 1U << 10, |
| |
| PERF_SAMPLE_MAX = 1U << 11, /* non-ABI */ |
| }; |
| |
| /* |
| * The format of the data returned by read() on a perf event fd, |
| * as specified by attr.read_format: |
| * |
| * struct read_format { |
| * { u64 value; |
| * { u64 time_enabled; } && PERF_FORMAT_ENABLED |
| * { u64 time_running; } && PERF_FORMAT_RUNNING |
| * { u64 id; } && PERF_FORMAT_ID |
| * } && !PERF_FORMAT_GROUP |
| * |
| * { u64 nr; |
| * { u64 time_enabled; } && PERF_FORMAT_ENABLED |
| * { u64 time_running; } && PERF_FORMAT_RUNNING |
| * { u64 value; |
| * { u64 id; } && PERF_FORMAT_ID |
| * } cntr[nr]; |
| * } && PERF_FORMAT_GROUP |
| * }; |
| */ |
| enum perf_event_read_format { |
| PERF_FORMAT_TOTAL_TIME_ENABLED = 1U << 0, |
| PERF_FORMAT_TOTAL_TIME_RUNNING = 1U << 1, |
| PERF_FORMAT_ID = 1U << 2, |
| PERF_FORMAT_GROUP = 1U << 3, |
| |
| PERF_FORMAT_MAX = 1U << 4, /* non-ABI */ |
| }; |
| |
| #define PERF_ATTR_SIZE_VER0 64 /* sizeof first published struct */ |
| |
| /* |
| * Hardware event_id to monitor via a performance monitoring event: |
| */ |
| struct perf_event_attr { |
| |
| /* |
| * Major type: hardware/software/tracepoint/etc. |
| */ |
| __u32 type; |
| |
| /* |
| * Size of the attr structure, for fwd/bwd compat. |
| */ |
| __u32 size; |
| |
| /* |
| * Type specific configuration information. |
| */ |
| __u64 config; |
| |
| union { |
| __u64 sample_period; |
| __u64 sample_freq; |
| }; |
| |
| __u64 sample_type; |
| __u64 read_format; |
| |
| __u64 disabled : 1, /* off by default */ |
| inherit : 1, /* children inherit it */ |
| pinned : 1, /* must always be on PMU */ |
| exclusive : 1, /* only group on PMU */ |
| exclude_user : 1, /* don't count user */ |
| exclude_kernel : 1, /* ditto kernel */ |
| exclude_hv : 1, /* ditto hypervisor */ |
| exclude_idle : 1, /* don't count when idle */ |
| mmap : 1, /* include mmap data */ |
| comm : 1, /* include comm data */ |
| freq : 1, /* use freq, not period */ |
| inherit_stat : 1, /* per task counts */ |
| enable_on_exec : 1, /* next exec enables */ |
| task : 1, /* trace fork/exit */ |
| watermark : 1, /* wakeup_watermark */ |
| /* |
| * precise_ip: |
| * |
| * 0 - SAMPLE_IP can have arbitrary skid |
| * 1 - SAMPLE_IP must have constant skid |
| * 2 - SAMPLE_IP requested to have 0 skid |
| * 3 - SAMPLE_IP must have 0 skid |
| * |
| * See also PERF_RECORD_MISC_EXACT_IP |
| */ |
| precise_ip : 2, /* skid constraint */ |
| mmap_data : 1, /* non-exec mmap data */ |
| sample_id_all : 1, /* sample_type all events */ |
| |
| __reserved_1 : 45; |
| |
| union { |
| __u32 wakeup_events; /* wakeup every n events */ |
| __u32 wakeup_watermark; /* bytes before wakeup */ |
| }; |
| |
| __u32 bp_type; |
| union { |
| __u64 bp_addr; |
| __u64 config1; /* extension of config */ |
| }; |
| union { |
| __u64 bp_len; |
| __u64 config2; /* extension of config1 */ |
| }; |
| }; |
| |
| /* |
| * Ioctls that can be done on a perf event fd: |
| */ |
| #define PERF_EVENT_IOC_ENABLE _IO ('$', 0) |
| #define PERF_EVENT_IOC_DISABLE _IO ('$', 1) |
| #define PERF_EVENT_IOC_REFRESH _IO ('$', 2) |
| #define PERF_EVENT_IOC_RESET _IO ('$', 3) |
| #define PERF_EVENT_IOC_PERIOD _IOW('$', 4, __u64) |
| #define PERF_EVENT_IOC_SET_OUTPUT _IO ('$', 5) |
| #define PERF_EVENT_IOC_SET_FILTER _IOW('$', 6, char *) |
| |
| enum perf_event_ioc_flags { |
| PERF_IOC_FLAG_GROUP = 1U << 0, |
| }; |
| |
| /* |
| * Structure of the page that can be mapped via mmap |
| */ |
| struct perf_event_mmap_page { |
| __u32 version; /* version number of this structure */ |
| __u32 compat_version; /* lowest version this is compat with */ |
| |
| /* |
| * Bits needed to read the hw events in user-space. |
| * |
| * u32 seq; |
| * s64 count; |
| * |
| * do { |
| * seq = pc->lock; |
| * |
| * barrier() |
| * if (pc->index) { |
| * count = pmc_read(pc->index - 1); |
| * count += pc->offset; |
| * } else |
| * goto regular_read; |
| * |
| * barrier(); |
| * } while (pc->lock != seq); |
| * |
| * NOTE: for obvious reason this only works on self-monitoring |
| * processes. |
| */ |
| __u32 lock; /* seqlock for synchronization */ |
| __u32 index; /* hardware event identifier */ |
| __s64 offset; /* add to hardware event value */ |
| __u64 time_enabled; /* time event active */ |
| __u64 time_running; /* time event on cpu */ |
| |
| /* |
| * Hole for extension of the self monitor capabilities |
| */ |
| |
| __u64 __reserved[123]; /* align to 1k */ |
| |
| /* |
| * Control data for the mmap() data buffer. |
| * |
| * User-space reading the @data_head value should issue an rmb(), on |
| * SMP capable platforms, after reading this value -- see |
| * perf_event_wakeup(). |
| * |
| * When the mapping is PROT_WRITE the @data_tail value should be |
| * written by userspace to reflect the last read data. In this case |
| * the kernel will not over-write unread data. |
| */ |
| __u64 data_head; /* head in the data section */ |
| __u64 data_tail; /* user-space written tail */ |
| }; |
| |
| #define PERF_RECORD_MISC_CPUMODE_MASK (7 << 0) |
| #define PERF_RECORD_MISC_CPUMODE_UNKNOWN (0 << 0) |
| #define PERF_RECORD_MISC_KERNEL (1 << 0) |
| #define PERF_RECORD_MISC_USER (2 << 0) |
| #define PERF_RECORD_MISC_HYPERVISOR (3 << 0) |
| #define PERF_RECORD_MISC_GUEST_KERNEL (4 << 0) |
| #define PERF_RECORD_MISC_GUEST_USER (5 << 0) |
| |
| /* |
| * Indicates that the content of PERF_SAMPLE_IP points to |
| * the actual instruction that triggered the event. See also |
| * perf_event_attr::precise_ip. |
| */ |
| #define PERF_RECORD_MISC_EXACT_IP (1 << 14) |
| /* |
| * Reserve the last bit to indicate some extended misc field |
| */ |
| #define PERF_RECORD_MISC_EXT_RESERVED (1 << 15) |
| |
| struct perf_event_header { |
| __u32 type; |
| __u16 misc; |
| __u16 size; |
| }; |
| |
| enum perf_event_type { |
| |
| /* |
| * If perf_event_attr.sample_id_all is set then all event types will |
| * have the sample_type selected fields related to where/when |
| * (identity) an event took place (TID, TIME, ID, CPU, STREAM_ID) |
| * described in PERF_RECORD_SAMPLE below, it will be stashed just after |
| * the perf_event_header and the fields already present for the existing |
| * fields, i.e. at the end of the payload. That way a newer perf.data |
| * file will be supported by older perf tools, with these new optional |
| * fields being ignored. |
| * |
| * The MMAP events record the PROT_EXEC mappings so that we can |
| * correlate userspace IPs to code. They have the following structure: |
| * |
| * struct { |
| * struct perf_event_header header; |
| * |
| * u32 pid, tid; |
| * u64 addr; |
| * u64 len; |
| * u64 pgoff; |
| * char filename[]; |
| * }; |
| */ |
| PERF_RECORD_MMAP = 1, |
| |
| /* |
| * struct { |
| * struct perf_event_header header; |
| * u64 id; |
| * u64 lost; |
| * }; |
| */ |
| PERF_RECORD_LOST = 2, |
| |
| /* |
| * struct { |
| * struct perf_event_header header; |
| * |
| * u32 pid, tid; |
| * char comm[]; |
| * }; |
| */ |
| PERF_RECORD_COMM = 3, |
| |
| /* |
| * struct { |
| * struct perf_event_header header; |
| * u32 pid, ppid; |
| * u32 tid, ptid; |
| * u64 time; |
| * }; |
| */ |
| PERF_RECORD_EXIT = 4, |
| |
| /* |
| * struct { |
| * struct perf_event_header header; |
| * u64 time; |
| * u64 id; |
| * u64 stream_id; |
| * }; |
| */ |
| PERF_RECORD_THROTTLE = 5, |
| PERF_RECORD_UNTHROTTLE = 6, |
| |
| /* |
| * struct { |
| * struct perf_event_header header; |
| * u32 pid, ppid; |
| * u32 tid, ptid; |
| * u64 time; |
| * }; |
| */ |
| PERF_RECORD_FORK = 7, |
| |
| /* |
| * struct { |
| * struct perf_event_header header; |
| * u32 pid, tid; |
| * |
| * struct read_format values; |
| * }; |
| */ |
| PERF_RECORD_READ = 8, |
| |
| /* |
| * struct { |
| * struct perf_event_header header; |
| * |
| * { u64 ip; } && PERF_SAMPLE_IP |
| * { u32 pid, tid; } && PERF_SAMPLE_TID |
| * { u64 time; } && PERF_SAMPLE_TIME |
| * { u64 addr; } && PERF_SAMPLE_ADDR |
| * { u64 id; } && PERF_SAMPLE_ID |
| * { u64 stream_id;} && PERF_SAMPLE_STREAM_ID |
| * { u32 cpu, res; } && PERF_SAMPLE_CPU |
| * { u64 period; } && PERF_SAMPLE_PERIOD |
| * |
| * { struct read_format values; } && PERF_SAMPLE_READ |
| * |
| * { u64 nr, |
| * u64 ips[nr]; } && PERF_SAMPLE_CALLCHAIN |
| * |
| * # |
| * # The RAW record below is opaque data wrt the ABI |
| * # |
| * # That is, the ABI doesn't make any promises wrt to |
| * # the stability of its content, it may vary depending |
| * # on event, hardware, kernel version and phase of |
| * # the moon. |
| * # |
| * # In other words, PERF_SAMPLE_RAW contents are not an ABI. |
| * # |
| * |
| * { u32 size; |
| * char data[size];}&& PERF_SAMPLE_RAW |
| * }; |
| */ |
| PERF_RECORD_SAMPLE = 9, |
| |
| PERF_RECORD_MAX, /* non-ABI */ |
| }; |
| |
| enum perf_callchain_context { |
| PERF_CONTEXT_HV = (__u64)-32, |
| PERF_CONTEXT_KERNEL = (__u64)-128, |
| PERF_CONTEXT_USER = (__u64)-512, |
| |
| PERF_CONTEXT_GUEST = (__u64)-2048, |
| PERF_CONTEXT_GUEST_KERNEL = (__u64)-2176, |
| PERF_CONTEXT_GUEST_USER = (__u64)-2560, |
| |
| PERF_CONTEXT_MAX = (__u64)-4095, |
| }; |
| |
| #define PERF_FLAG_FD_NO_GROUP (1U << 0) |
| #define PERF_FLAG_FD_OUTPUT (1U << 1) |
| #define PERF_FLAG_PID_CGROUP (1U << 2) /* pid=cgroup id, per-cpu mode only */ |
| |
| #ifdef __KERNEL__ |
| /* |
| * Kernel-internal data types and definitions: |
| */ |
| |
| #ifdef CONFIG_PERF_EVENTS |
| # include <linux/cgroup.h> |
| # 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/jump_label_ref.h> |
| #include <asm/atomic.h> |
| #include <asm/local.h> |
| |
| #define PERF_MAX_STACK_DEPTH 255 |
| |
| struct perf_callchain_entry { |
| __u64 nr; |
| __u64 ip[PERF_MAX_STACK_DEPTH]; |
| }; |
| |
| struct perf_raw_record { |
| u32 size; |
| void *data; |
| }; |
| |
| struct perf_branch_entry { |
| __u64 from; |
| __u64 to; |
| __u64 flags; |
| }; |
| |
| struct perf_branch_stack { |
| __u64 nr; |
| struct perf_branch_entry entries[0]; |
| }; |
| |
| struct task_struct; |
| |
| /** |
| * 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 idx; |
| int last_cpu; |
| unsigned int extra_reg; |
| u64 extra_config; |
| int extra_alloc; |
| }; |
| struct { /* software */ |
| struct hrtimer hrtimer; |
| }; |
| #ifdef CONFIG_HAVE_HW_BREAKPOINT |
| struct { /* breakpoint */ |
| struct arch_hw_breakpoint info; |
| struct list_head bp_list; |
| /* |
| * Crufty hack to avoid the chicken and egg |
| * problem hw_breakpoint has with context |
| * creation and event initalization. |
| */ |
| struct task_struct *bp_target; |
| }; |
| #endif |
| }; |
| int state; |
| local64_t prev_count; |
| u64 sample_period; |
| u64 last_period; |
| local64_t period_left; |
| 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; |
| 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 */ |
| }; |
| |
| /** |
| * 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; |
| |
| #define PERF_BUFFER_WRITABLE 0x01 |
| |
| struct perf_buffer { |
| atomic_t refcount; |
| struct rcu_head rcu_head; |
| #ifdef CONFIG_PERF_USE_VMALLOC |
| struct work_struct work; |
| int page_order; /* allocation order */ |
| #endif |
| int nr_pages; /* nr of data pages */ |
| int writable; /* are we writable */ |
| |
| atomic_t poll; /* POLL_ for wakeups */ |
| |
| local_t head; /* write position */ |
| local_t nest; /* nested writers */ |
| local_t events; /* event limit */ |
| local_t wakeup; /* wakeup stamp */ |
| local_t lost; /* nr records lost */ |
| |
| long watermark; /* wakeup watermark */ |
| |
| struct perf_event_mmap_page *user_page; |
| void *data_pages[0]; |
| }; |
| |
| struct perf_sample_data; |
| |
| typedef void (*perf_overflow_handler_t)(struct perf_event *, int, |
| 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 |
| |
| #ifdef CONFIG_CGROUP_PERF |
| /* |
| * 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 *info; /* timing info, one per cpu */ |
| }; |
| #endif |
| |
| /** |
| * 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; |
| struct file *filp; |
| |
| /* |
| * 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; |
| int mmap_locked; |
| struct user_struct *mmap_user; |
| struct perf_buffer *buffer; |
| |
| /* 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; |
| |
| #ifdef CONFIG_EVENT_TRACING |
| struct ftrace_event_call *tp_event; |
| struct event_filter *filter; |
| #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 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; |
| struct rcu_head rcu_head; |
| int nr_cgroups; /* cgroup events present */ |
| }; |
| |
| /* |
| * 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 *active_pmu; |
| struct perf_cgroup *cgrp; |
| }; |
| |
| struct perf_output_handle { |
| struct perf_event *event; |
| struct perf_buffer *buffer; |
| unsigned long wakeup; |
| unsigned long size; |
| void *addr; |
| int page; |
| int nmi; |
| int sample; |
| }; |
| |
| #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 *task); |
| extern void __perf_event_task_sched_out(struct task_struct *task, 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 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); |
| 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; |
| struct perf_callchain_entry *callchain; |
| struct perf_raw_record *raw; |
| }; |
| |
| static inline |
| void perf_sample_data_init(struct perf_sample_data *data, u64 addr) |
| { |
| data->addr = addr; |
| data->raw = NULL; |
| } |
| |
| 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, int nmi, |
| 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 atomic_t perf_swevent_enabled[PERF_COUNT_SW_MAX]; |
| |
| extern void __perf_sw_event(u32, u64, int, 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, int nmi, struct pt_regs *regs, u64 addr) |
| { |
| struct pt_regs hot_regs; |
| |
| JUMP_LABEL(&perf_swevent_enabled[event_id], have_event); |
| return; |
| |
| have_event: |
| if (!regs) { |
| perf_fetch_caller_regs(&hot_regs); |
| regs = &hot_regs; |
| } |
| __perf_sw_event(event_id, nr, nmi, regs, addr); |
| } |
| |
| extern atomic_t perf_sched_events; |
| |
| static inline void perf_event_task_sched_in(struct task_struct *task) |
| { |
| COND_STMT(&perf_sched_events, __perf_event_task_sched_in(task)); |
| } |
| |
| static inline |
| void perf_event_task_sched_out(struct task_struct *task, struct task_struct *next) |
| { |
| perf_sw_event(PERF_COUNT_SW_CONTEXT_SWITCHES, 1, 1, NULL, 0); |
| |
| COND_STMT(&perf_sched_events, __perf_event_task_sched_out(task, 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 perf_proc_update_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); |
| 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 |
| |
| extern int perf_output_begin(struct perf_output_handle *handle, |
| struct perf_event *event, unsigned int size, |
| int nmi, int sample); |
| extern void perf_output_end(struct perf_output_handle *handle); |
| extern void perf_output_copy(struct perf_output_handle *handle, |
| const void *buf, 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 void perf_event_task_tick(void); |
| #else |
| static inline void |
| perf_event_task_sched_in(struct task_struct *task) { } |
| static inline void |
| perf_event_task_sched_out(struct task_struct *task, |
| 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 void |
| perf_sw_event(u32 event_id, u64 nr, int nmi, |
| 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 void perf_event_task_tick(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 }; \ |
| fn(&fn##_nb, (unsigned long)CPU_UP_PREPARE, \ |
| (void *)(unsigned long)smp_processor_id()); \ |
| fn(&fn##_nb, (unsigned long)CPU_STARTING, \ |
| (void *)(unsigned long)smp_processor_id()); \ |
| fn(&fn##_nb, (unsigned long)CPU_ONLINE, \ |
| (void *)(unsigned long)smp_processor_id()); \ |
| register_cpu_notifier(&fn##_nb); \ |
| } while (0) |
| |
| #endif /* __KERNEL__ */ |
| #endif /* _LINUX_PERF_EVENT_H */ |