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![Jiri Olsa](/assets/img/avatar_default.png)
Having the build time assertion in header is making the perf build fail on x86 with: ../../include/linux/perf_event.h:411:32: error: variably modified \ ‘__assert_mmap_data_head_offset’ at file scope [-Werror] I'm moving the build time validation out of the header, because I think it's better than to lessen the perf build warn/error check. Signed-off-by: Jiri Olsa <jolsa@redhat.com> Cc: acme@redhat.com Cc: a.p.zijlstra@chello.nl Cc: paulus@samba.org Cc: cjashfor@linux.vnet.ibm.com Cc: fweisbec@gmail.com Link: http://lkml.kernel.org/r/1332513680-7870-1-git-send-email-jolsa@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
1365 lines
36 KiB
C
1365 lines
36 KiB
C
/*
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* Performance events:
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*
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* Copyright (C) 2008-2009, Thomas Gleixner <tglx@linutronix.de>
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* Copyright (C) 2008-2011, Red Hat, Inc., Ingo Molnar
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* Copyright (C) 2008-2011, Red Hat, Inc., Peter Zijlstra
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*
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* Data type definitions, declarations, prototypes.
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*
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* Started by: Thomas Gleixner and Ingo Molnar
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*
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* For licencing details see kernel-base/COPYING
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*/
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#ifndef _LINUX_PERF_EVENT_H
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#define _LINUX_PERF_EVENT_H
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#include <linux/types.h>
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#include <linux/ioctl.h>
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#include <asm/byteorder.h>
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/*
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* User-space ABI bits:
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*/
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/*
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* attr.type
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*/
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enum perf_type_id {
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PERF_TYPE_HARDWARE = 0,
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PERF_TYPE_SOFTWARE = 1,
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PERF_TYPE_TRACEPOINT = 2,
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PERF_TYPE_HW_CACHE = 3,
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PERF_TYPE_RAW = 4,
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PERF_TYPE_BREAKPOINT = 5,
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PERF_TYPE_MAX, /* non-ABI */
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};
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/*
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* Generalized performance event event_id types, used by the
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* attr.event_id parameter of the sys_perf_event_open()
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* syscall:
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*/
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enum perf_hw_id {
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/*
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* Common hardware events, generalized by the kernel:
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*/
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PERF_COUNT_HW_CPU_CYCLES = 0,
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PERF_COUNT_HW_INSTRUCTIONS = 1,
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PERF_COUNT_HW_CACHE_REFERENCES = 2,
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PERF_COUNT_HW_CACHE_MISSES = 3,
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PERF_COUNT_HW_BRANCH_INSTRUCTIONS = 4,
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PERF_COUNT_HW_BRANCH_MISSES = 5,
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PERF_COUNT_HW_BUS_CYCLES = 6,
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PERF_COUNT_HW_STALLED_CYCLES_FRONTEND = 7,
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PERF_COUNT_HW_STALLED_CYCLES_BACKEND = 8,
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PERF_COUNT_HW_REF_CPU_CYCLES = 9,
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PERF_COUNT_HW_MAX, /* non-ABI */
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};
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/*
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* Generalized hardware cache events:
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*
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* { L1-D, L1-I, LLC, ITLB, DTLB, BPU, NODE } x
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* { read, write, prefetch } x
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* { accesses, misses }
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*/
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enum perf_hw_cache_id {
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PERF_COUNT_HW_CACHE_L1D = 0,
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PERF_COUNT_HW_CACHE_L1I = 1,
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PERF_COUNT_HW_CACHE_LL = 2,
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PERF_COUNT_HW_CACHE_DTLB = 3,
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PERF_COUNT_HW_CACHE_ITLB = 4,
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PERF_COUNT_HW_CACHE_BPU = 5,
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PERF_COUNT_HW_CACHE_NODE = 6,
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PERF_COUNT_HW_CACHE_MAX, /* non-ABI */
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};
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enum perf_hw_cache_op_id {
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PERF_COUNT_HW_CACHE_OP_READ = 0,
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PERF_COUNT_HW_CACHE_OP_WRITE = 1,
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PERF_COUNT_HW_CACHE_OP_PREFETCH = 2,
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PERF_COUNT_HW_CACHE_OP_MAX, /* non-ABI */
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};
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enum perf_hw_cache_op_result_id {
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PERF_COUNT_HW_CACHE_RESULT_ACCESS = 0,
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PERF_COUNT_HW_CACHE_RESULT_MISS = 1,
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PERF_COUNT_HW_CACHE_RESULT_MAX, /* non-ABI */
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};
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/*
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* Special "software" events provided by the kernel, even if the hardware
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* does not support performance events. These events measure various
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* physical and sw events of the kernel (and allow the profiling of them as
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* well):
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*/
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enum perf_sw_ids {
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PERF_COUNT_SW_CPU_CLOCK = 0,
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PERF_COUNT_SW_TASK_CLOCK = 1,
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PERF_COUNT_SW_PAGE_FAULTS = 2,
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PERF_COUNT_SW_CONTEXT_SWITCHES = 3,
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PERF_COUNT_SW_CPU_MIGRATIONS = 4,
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PERF_COUNT_SW_PAGE_FAULTS_MIN = 5,
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PERF_COUNT_SW_PAGE_FAULTS_MAJ = 6,
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PERF_COUNT_SW_ALIGNMENT_FAULTS = 7,
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PERF_COUNT_SW_EMULATION_FAULTS = 8,
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PERF_COUNT_SW_MAX, /* non-ABI */
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};
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/*
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* Bits that can be set in attr.sample_type to request information
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* in the overflow packets.
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*/
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enum perf_event_sample_format {
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PERF_SAMPLE_IP = 1U << 0,
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PERF_SAMPLE_TID = 1U << 1,
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PERF_SAMPLE_TIME = 1U << 2,
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PERF_SAMPLE_ADDR = 1U << 3,
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PERF_SAMPLE_READ = 1U << 4,
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PERF_SAMPLE_CALLCHAIN = 1U << 5,
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PERF_SAMPLE_ID = 1U << 6,
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PERF_SAMPLE_CPU = 1U << 7,
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PERF_SAMPLE_PERIOD = 1U << 8,
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PERF_SAMPLE_STREAM_ID = 1U << 9,
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PERF_SAMPLE_RAW = 1U << 10,
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PERF_SAMPLE_BRANCH_STACK = 1U << 11,
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PERF_SAMPLE_MAX = 1U << 12, /* non-ABI */
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};
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/*
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* values to program into branch_sample_type when PERF_SAMPLE_BRANCH is set
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*
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* If the user does not pass priv level information via branch_sample_type,
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* the kernel uses the event's priv level. Branch and event priv levels do
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* not have to match. Branch priv level is checked for permissions.
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*
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* The branch types can be combined, however BRANCH_ANY covers all types
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* of branches and therefore it supersedes all the other types.
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*/
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enum perf_branch_sample_type {
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PERF_SAMPLE_BRANCH_USER = 1U << 0, /* user branches */
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PERF_SAMPLE_BRANCH_KERNEL = 1U << 1, /* kernel branches */
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PERF_SAMPLE_BRANCH_HV = 1U << 2, /* hypervisor branches */
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PERF_SAMPLE_BRANCH_ANY = 1U << 3, /* any branch types */
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PERF_SAMPLE_BRANCH_ANY_CALL = 1U << 4, /* any call branch */
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PERF_SAMPLE_BRANCH_ANY_RETURN = 1U << 5, /* any return branch */
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PERF_SAMPLE_BRANCH_IND_CALL = 1U << 6, /* indirect calls */
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PERF_SAMPLE_BRANCH_MAX = 1U << 7, /* non-ABI */
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};
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#define PERF_SAMPLE_BRANCH_PLM_ALL \
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(PERF_SAMPLE_BRANCH_USER|\
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PERF_SAMPLE_BRANCH_KERNEL|\
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PERF_SAMPLE_BRANCH_HV)
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/*
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* The format of the data returned by read() on a perf event fd,
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* as specified by attr.read_format:
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*
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* struct read_format {
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* { u64 value;
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* { u64 time_enabled; } && PERF_FORMAT_TOTAL_TIME_ENABLED
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* { u64 time_running; } && PERF_FORMAT_TOTAL_TIME_RUNNING
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* { u64 id; } && PERF_FORMAT_ID
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* } && !PERF_FORMAT_GROUP
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*
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* { u64 nr;
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* { u64 time_enabled; } && PERF_FORMAT_TOTAL_TIME_ENABLED
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* { u64 time_running; } && PERF_FORMAT_TOTAL_TIME_RUNNING
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* { u64 value;
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* { u64 id; } && PERF_FORMAT_ID
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* } cntr[nr];
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* } && PERF_FORMAT_GROUP
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* };
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*/
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enum perf_event_read_format {
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PERF_FORMAT_TOTAL_TIME_ENABLED = 1U << 0,
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PERF_FORMAT_TOTAL_TIME_RUNNING = 1U << 1,
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PERF_FORMAT_ID = 1U << 2,
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PERF_FORMAT_GROUP = 1U << 3,
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PERF_FORMAT_MAX = 1U << 4, /* non-ABI */
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};
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#define PERF_ATTR_SIZE_VER0 64 /* sizeof first published struct */
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#define PERF_ATTR_SIZE_VER1 72 /* add: config2 */
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#define PERF_ATTR_SIZE_VER2 80 /* add: branch_sample_type */
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/*
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* Hardware event_id to monitor via a performance monitoring event:
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*/
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struct perf_event_attr {
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/*
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* Major type: hardware/software/tracepoint/etc.
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*/
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__u32 type;
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/*
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* Size of the attr structure, for fwd/bwd compat.
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*/
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__u32 size;
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/*
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* Type specific configuration information.
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*/
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__u64 config;
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union {
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__u64 sample_period;
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__u64 sample_freq;
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};
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__u64 sample_type;
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__u64 read_format;
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__u64 disabled : 1, /* off by default */
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inherit : 1, /* children inherit it */
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pinned : 1, /* must always be on PMU */
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exclusive : 1, /* only group on PMU */
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exclude_user : 1, /* don't count user */
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exclude_kernel : 1, /* ditto kernel */
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exclude_hv : 1, /* ditto hypervisor */
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exclude_idle : 1, /* don't count when idle */
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mmap : 1, /* include mmap data */
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comm : 1, /* include comm data */
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freq : 1, /* use freq, not period */
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inherit_stat : 1, /* per task counts */
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enable_on_exec : 1, /* next exec enables */
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task : 1, /* trace fork/exit */
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watermark : 1, /* wakeup_watermark */
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/*
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* precise_ip:
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*
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* 0 - SAMPLE_IP can have arbitrary skid
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* 1 - SAMPLE_IP must have constant skid
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* 2 - SAMPLE_IP requested to have 0 skid
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* 3 - SAMPLE_IP must have 0 skid
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*
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* See also PERF_RECORD_MISC_EXACT_IP
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*/
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precise_ip : 2, /* skid constraint */
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mmap_data : 1, /* non-exec mmap data */
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sample_id_all : 1, /* sample_type all events */
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exclude_host : 1, /* don't count in host */
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exclude_guest : 1, /* don't count in guest */
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__reserved_1 : 43;
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union {
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__u32 wakeup_events; /* wakeup every n events */
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__u32 wakeup_watermark; /* bytes before wakeup */
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};
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__u32 bp_type;
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union {
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__u64 bp_addr;
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__u64 config1; /* extension of config */
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};
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union {
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__u64 bp_len;
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__u64 config2; /* extension of config1 */
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};
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__u64 branch_sample_type; /* enum branch_sample_type */
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};
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/*
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* Ioctls that can be done on a perf event fd:
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*/
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#define PERF_EVENT_IOC_ENABLE _IO ('$', 0)
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#define PERF_EVENT_IOC_DISABLE _IO ('$', 1)
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#define PERF_EVENT_IOC_REFRESH _IO ('$', 2)
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#define PERF_EVENT_IOC_RESET _IO ('$', 3)
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#define PERF_EVENT_IOC_PERIOD _IOW('$', 4, __u64)
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#define PERF_EVENT_IOC_SET_OUTPUT _IO ('$', 5)
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#define PERF_EVENT_IOC_SET_FILTER _IOW('$', 6, char *)
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enum perf_event_ioc_flags {
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PERF_IOC_FLAG_GROUP = 1U << 0,
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};
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/*
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* Structure of the page that can be mapped via mmap
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*/
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struct perf_event_mmap_page {
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__u32 version; /* version number of this structure */
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__u32 compat_version; /* lowest version this is compat with */
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/*
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* Bits needed to read the hw events in user-space.
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*
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* u32 seq, time_mult, time_shift, idx, width;
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* u64 count, enabled, running;
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* u64 cyc, time_offset;
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* s64 pmc = 0;
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*
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* do {
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* seq = pc->lock;
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* barrier()
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*
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* enabled = pc->time_enabled;
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* running = pc->time_running;
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*
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* if (pc->cap_usr_time && enabled != running) {
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* cyc = rdtsc();
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* time_offset = pc->time_offset;
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* time_mult = pc->time_mult;
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* time_shift = pc->time_shift;
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* }
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*
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* idx = pc->index;
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* count = pc->offset;
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* if (pc->cap_usr_rdpmc && idx) {
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* width = pc->pmc_width;
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* pmc = rdpmc(idx - 1);
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* }
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*
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* barrier();
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* } while (pc->lock != seq);
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*
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* NOTE: for obvious reason this only works on self-monitoring
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* processes.
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*/
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__u32 lock; /* seqlock for synchronization */
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__u32 index; /* hardware event identifier */
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__s64 offset; /* add to hardware event value */
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__u64 time_enabled; /* time event active */
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__u64 time_running; /* time event on cpu */
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union {
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__u64 capabilities;
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__u64 cap_usr_time : 1,
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cap_usr_rdpmc : 1,
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cap_____res : 62;
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};
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/*
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* If cap_usr_rdpmc this field provides the bit-width of the value
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* read using the rdpmc() or equivalent instruction. This can be used
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* to sign extend the result like:
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*
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* pmc <<= 64 - width;
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* pmc >>= 64 - width; // signed shift right
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* count += pmc;
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*/
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__u16 pmc_width;
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/*
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* If cap_usr_time the below fields can be used to compute the time
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* delta since time_enabled (in ns) using rdtsc or similar.
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*
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* u64 quot, rem;
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* u64 delta;
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*
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* quot = (cyc >> time_shift);
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* rem = cyc & ((1 << time_shift) - 1);
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* delta = time_offset + quot * time_mult +
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* ((rem * time_mult) >> time_shift);
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*
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* Where time_offset,time_mult,time_shift and cyc are read in the
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* seqcount loop described above. This delta can then be added to
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* enabled and possible running (if idx), improving the scaling:
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*
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* enabled += delta;
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* if (idx)
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* running += delta;
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*
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* quot = count / running;
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* rem = count % running;
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* count = quot * enabled + (rem * enabled) / running;
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*/
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__u16 time_shift;
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__u32 time_mult;
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__u64 time_offset;
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/*
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* Hole for extension of the self monitor capabilities
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*/
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__u64 __reserved[120]; /* align to 1k */
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/*
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* Control data for the mmap() data buffer.
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*
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* User-space reading the @data_head value should issue an rmb(), on
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* SMP capable platforms, after reading this value -- see
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* perf_event_wakeup().
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*
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* When the mapping is PROT_WRITE the @data_tail value should be
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* written by userspace to reflect the last read data. In this case
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* the kernel will not over-write unread data.
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*/
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__u64 data_head; /* head in the data section */
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__u64 data_tail; /* user-space written tail */
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};
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#define PERF_RECORD_MISC_CPUMODE_MASK (7 << 0)
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#define PERF_RECORD_MISC_CPUMODE_UNKNOWN (0 << 0)
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#define PERF_RECORD_MISC_KERNEL (1 << 0)
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#define PERF_RECORD_MISC_USER (2 << 0)
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#define PERF_RECORD_MISC_HYPERVISOR (3 << 0)
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#define PERF_RECORD_MISC_GUEST_KERNEL (4 << 0)
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#define PERF_RECORD_MISC_GUEST_USER (5 << 0)
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/*
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* Indicates that the content of PERF_SAMPLE_IP points to
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* the actual instruction that triggered the event. See also
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* perf_event_attr::precise_ip.
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*/
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#define PERF_RECORD_MISC_EXACT_IP (1 << 14)
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/*
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* Reserve the last bit to indicate some extended misc field
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*/
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#define PERF_RECORD_MISC_EXT_RESERVED (1 << 15)
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struct perf_event_header {
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__u32 type;
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__u16 misc;
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__u16 size;
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};
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enum perf_event_type {
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/*
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* If perf_event_attr.sample_id_all is set then all event types will
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* have the sample_type selected fields related to where/when
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* (identity) an event took place (TID, TIME, ID, CPU, STREAM_ID)
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* described in PERF_RECORD_SAMPLE below, it will be stashed just after
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* the perf_event_header and the fields already present for the existing
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* fields, i.e. at the end of the payload. That way a newer perf.data
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* file will be supported by older perf tools, with these new optional
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* fields being ignored.
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*
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* The MMAP events record the PROT_EXEC mappings so that we can
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* correlate userspace IPs to code. They have the following structure:
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*
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* struct {
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* struct perf_event_header header;
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*
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* u32 pid, tid;
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* u64 addr;
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* u64 len;
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* u64 pgoff;
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* char filename[];
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* };
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*/
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PERF_RECORD_MMAP = 1,
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/*
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* struct {
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* struct perf_event_header header;
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* u64 id;
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* u64 lost;
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* };
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*/
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PERF_RECORD_LOST = 2,
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/*
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* struct {
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* struct perf_event_header header;
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*
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* u32 pid, tid;
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* char comm[];
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* };
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*/
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PERF_RECORD_COMM = 3,
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/*
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* struct {
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* struct perf_event_header header;
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* u32 pid, ppid;
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* u32 tid, ptid;
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* 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
|
|
*
|
|
* { u64 from, to, flags } lbr[nr];} && PERF_SAMPLE_BRANCH_STACK
|
|
* };
|
|
*/
|
|
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/static_key.h>
|
|
#include <linux/atomic.h>
|
|
#include <linux/sysfs.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;
|
|
};
|
|
|
|
/*
|
|
* 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 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 idx;
|
|
int last_cpu;
|
|
|
|
struct hw_perf_event_extra extra_reg;
|
|
struct hw_perf_event_extra branch_reg;
|
|
};
|
|
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_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
|
|
|
|
#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 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;
|
|
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 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 *active_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 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;
|
|
struct perf_branch_stack *br_stack;
|
|
};
|
|
|
|
static inline void perf_sample_data_init(struct perf_sample_data *data, u64 addr)
|
|
{
|
|
data->addr = addr;
|
|
data->raw = NULL;
|
|
data->br_stack = 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,
|
|
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 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
|
|
|
|
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 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 *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 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)
|
|
|
|
|
|
#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 /* __KERNEL__ */
|
|
#endif /* _LINUX_PERF_EVENT_H */
|