diff options
Diffstat (limited to 'include/linux/perf_event.h')
| -rw-r--r-- | include/linux/perf_event.h | 1043 |
1 files changed, 784 insertions, 259 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index 0c19d279b97f..ec9d96025683 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -26,15 +26,9 @@ # 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); - void (*handle_intel_pt_intr)(void); -}; - #ifdef CONFIG_HAVE_HW_BREAKPOINT -#include <asm/hw_breakpoint.h> +# include <linux/rhashtable-types.h> +# include <asm/hw_breakpoint.h> #endif #include <linux/list.h> @@ -57,19 +51,22 @@ struct perf_guest_info_callbacks { #include <linux/cgroup.h> #include <linux/refcount.h> #include <linux/security.h> +#include <linux/static_call.h> +#include <linux/lockdep.h> + #include <asm/local.h> struct perf_callchain_entry { - __u64 nr; - __u64 ip[]; /* /proc/sys/kernel/perf_event_max_stack */ + u64 nr; + u64 ip[]; /* /proc/sys/kernel/perf_event_max_stack */ }; struct perf_callchain_entry_ctx { - struct perf_callchain_entry *entry; - u32 max_stack; - u32 nr; - short contexts; - bool contexts_maxed; + struct perf_callchain_entry *entry; + u32 max_stack; + u32 nr; + short contexts; + bool contexts_maxed; }; typedef unsigned long (*perf_copy_f)(void *dst, const void *src, @@ -90,6 +87,11 @@ struct perf_raw_record { u32 size; }; +static __always_inline bool perf_raw_frag_last(const struct perf_raw_frag *frag) +{ + return frag->pad < sizeof(u64); +} + /* * branch stack layout: * nr: number of taken branches stored in entries[] @@ -111,8 +113,8 @@ struct perf_raw_record { * already stored in age order, the hw_idx should be 0. */ struct perf_branch_stack { - __u64 nr; - __u64 hw_idx; + u64 nr; + u64 hw_idx; struct perf_branch_entry entries[]; }; @@ -122,13 +124,24 @@ 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[] */ + u64 config; /* register value */ + unsigned int reg; /* register address or index */ + int alloc; /* extra register already allocated */ + int idx; /* index in shared_regs->regs[] */ }; /** + * hw_perf_event::flag values + * + * PERF_EVENT_FLAG_ARCH bits are reserved for architecture-specific + * usage. + */ +#define PERF_EVENT_FLAG_ARCH 0x0fffffff +#define PERF_EVENT_FLAG_USER_READ_CNT 0x80000000 + +static_assert((PERF_EVENT_FLAG_USER_READ_CNT & PERF_EVENT_FLAG_ARCH) == 0); + +/** * struct hw_perf_event - performance event hardware details: */ struct hw_perf_event { @@ -136,7 +149,9 @@ struct hw_perf_event { union { struct { /* hardware */ u64 config; + u64 config1; u64 last_tag; + u64 dyn_constraint; unsigned long config_base; unsigned long event_base; int event_base_rdpmc; @@ -147,6 +162,15 @@ struct hw_perf_event { struct hw_perf_event_extra extra_reg; struct hw_perf_event_extra branch_reg; }; + struct { /* aux / Intel-PT */ + u64 aux_config; + /* + * For AUX area events, aux_paused cannot be a state + * flag because it can be updated asynchronously to + * state. + */ + unsigned int aux_paused; + }; struct { /* software */ struct hrtimer hrtimer; }; @@ -166,7 +190,7 @@ struct hw_perf_event { * creation and event initalization. */ struct arch_hw_breakpoint info; - struct list_head bp_list; + struct rhlist_head bp_list; }; #endif struct { /* amd_iommu */ @@ -195,9 +219,14 @@ struct hw_perf_event { /* * hw_perf_event::state flags; used to track the PERF_EF_* state. */ -#define PERF_HES_STOPPED 0x01 /* the counter is stopped */ -#define PERF_HES_UPTODATE 0x02 /* event->count up-to-date */ -#define PERF_HES_ARCH 0x04 + +/* the counter is stopped */ +#define PERF_HES_STOPPED 0x01 + +/* event->count up-to-date */ +#define PERF_HES_UPTODATE 0x02 + +#define PERF_HES_ARCH 0x04 int state; @@ -246,40 +275,66 @@ struct hw_perf_event { */ u64 freq_time_stamp; u64 freq_count_stamp; -#endif +#endif /* CONFIG_PERF_EVENTS */ }; struct perf_event; +struct perf_event_pmu_context; /* * Common implementation detail of pmu::{start,commit,cancel}_txn */ -#define PERF_PMU_TXN_ADD 0x1 /* txn to add/schedule event on PMU */ -#define PERF_PMU_TXN_READ 0x2 /* txn to read event group from PMU */ + +/* txn to add/schedule event on PMU */ +#define PERF_PMU_TXN_ADD 0x1 + +/* txn to read event group from PMU */ +#define PERF_PMU_TXN_READ 0x2 /** * pmu::capabilities flags */ -#define PERF_PMU_CAP_NO_INTERRUPT 0x01 -#define PERF_PMU_CAP_NO_NMI 0x02 -#define PERF_PMU_CAP_AUX_NO_SG 0x04 -#define PERF_PMU_CAP_EXTENDED_REGS 0x08 -#define PERF_PMU_CAP_EXCLUSIVE 0x10 -#define PERF_PMU_CAP_ITRACE 0x20 -#define PERF_PMU_CAP_HETEROGENEOUS_CPUS 0x40 -#define PERF_PMU_CAP_NO_EXCLUDE 0x80 -#define PERF_PMU_CAP_AUX_OUTPUT 0x100 +#define PERF_PMU_CAP_NO_INTERRUPT 0x0001 +#define PERF_PMU_CAP_NO_NMI 0x0002 +#define PERF_PMU_CAP_AUX_NO_SG 0x0004 +#define PERF_PMU_CAP_EXTENDED_REGS 0x0008 +#define PERF_PMU_CAP_EXCLUSIVE 0x0010 +#define PERF_PMU_CAP_ITRACE 0x0020 +#define PERF_PMU_CAP_NO_EXCLUDE 0x0040 +#define PERF_PMU_CAP_AUX_OUTPUT 0x0080 +#define PERF_PMU_CAP_EXTENDED_HW_TYPE 0x0100 +#define PERF_PMU_CAP_AUX_PAUSE 0x0200 +#define PERF_PMU_CAP_AUX_PREFER_LARGE 0x0400 + +/** + * pmu::scope + */ +enum perf_pmu_scope { + PERF_PMU_SCOPE_NONE = 0, + PERF_PMU_SCOPE_CORE, + PERF_PMU_SCOPE_DIE, + PERF_PMU_SCOPE_CLUSTER, + PERF_PMU_SCOPE_PKG, + PERF_PMU_SCOPE_SYS_WIDE, + PERF_PMU_MAX_SCOPE, +}; struct perf_output_handle; +#define PMU_NULL_DEV ((void *)(~0UL)) + /** * struct pmu - generic performance monitoring unit */ struct pmu { struct list_head entry; + spinlock_t events_lock; + struct list_head events; + struct module *module; struct device *dev; + struct device *parent; const struct attribute_group **attr_groups; const struct attribute_group **attr_update; const char *name; @@ -290,8 +345,12 @@ struct pmu { */ int capabilities; - int __percpu *pmu_disable_count; - struct perf_cpu_context __percpu *pmu_cpu_context; + /* + * PMU scope + */ + unsigned int scope; + + struct perf_cpu_pmu_context * __percpu *cpu_pmu_context; atomic_t exclusive_cnt; /* < 0: cpu; > 0: tsk */ int task_ctx_nr; int hrtimer_interval_ms; @@ -335,9 +394,21 @@ struct pmu { * Flags for ->add()/->del()/ ->start()/->stop(). There are * matching hw_perf_event::state flags. */ -#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 */ + +/* start the counter when adding */ +#define PERF_EF_START 0x01 + +/* reload the counter when starting */ +#define PERF_EF_RELOAD 0x02 + +/* update the counter when stopping */ +#define PERF_EF_UPDATE 0x04 + +/* AUX area event, pause tracing */ +#define PERF_EF_PAUSE 0x08 + +/* AUX area event, resume tracing */ +#define PERF_EF_RESUME 0x10 /* * Adds/Removes a counter to/from the PMU, can be done inside a @@ -377,6 +448,18 @@ struct pmu { * * ->start() with PERF_EF_RELOAD will reprogram the counter * value, must be preceded by a ->stop() with PERF_EF_UPDATE. + * + * ->stop() with PERF_EF_PAUSE will stop as simply as possible. Will not + * overlap another ->stop() with PERF_EF_PAUSE nor ->start() with + * PERF_EF_RESUME. + * + * ->start() with PERF_EF_RESUME will start as simply as possible but + * only if the counter is not otherwise stopped. Will not overlap + * another ->start() with PERF_EF_RESUME nor ->stop() with + * PERF_EF_PAUSE. + * + * Notably, PERF_EF_PAUSE/PERF_EF_RESUME *can* be concurrent with other + * ->stop()/->start() invocations, just not itself. */ void (*start) (struct perf_event *event, int flags); void (*stop) (struct perf_event *event, int flags); @@ -419,15 +502,16 @@ struct pmu { /* * Will return the value for perf_event_mmap_page::index for this event, - * if no implementation is provided it will default to: event->hw.idx + 1. + * if no implementation is provided it will default to 0 (see + * perf_event_idx_default). */ int (*event_idx) (struct perf_event *event); /*optional */ /* * context-switches callback */ - void (*sched_task) (struct perf_event_context *ctx, - bool sched_in); + void (*sched_task) (struct perf_event_pmu_context *pmu_ctx, + struct task_struct *task, bool sched_in); /* * Kmem cache of PMU specific data @@ -435,16 +519,6 @@ struct pmu { struct kmem_cache *task_ctx_cache; /* - * PMU specific parts of task perf event context (i.e. ctx->task_ctx_data) - * can be synchronized using this function. See Intel LBR callstack support - * implementation and Perf core context switch handling callbacks for usage - * examples. - */ - void (*swap_task_ctx) (struct perf_event_context *prev, - struct perf_event_context *next); - /* optional */ - - /* * Set up pmu-private data structures for an AUX area */ void *(*setup_aux) (struct perf_event *event, void **pages, @@ -505,9 +579,10 @@ struct pmu { /* optional */ /* - * Filter events for PMU-specific reasons. + * Skip programming this PMU on the given CPU. Typically needed for + * big.LITTLE things. */ - int (*filter_match) (struct perf_event *event); /* optional */ + bool (*filter) (struct pmu *pmu, int cpu); /* optional */ /* * Check period value for PERF_EVENT_IOC_PERIOD ioctl. @@ -532,10 +607,10 @@ enum perf_addr_filter_action_t { * This is a hardware-agnostic filter configuration as specified by the user. */ struct perf_addr_filter { - struct list_head entry; - struct path path; - unsigned long offset; - unsigned long size; + struct list_head entry; + struct path path; + unsigned long offset; + unsigned long size; enum perf_addr_filter_action_t action; }; @@ -550,23 +625,62 @@ struct perf_addr_filter { * bundled together; see perf_event_addr_filters(). */ struct perf_addr_filters_head { - struct list_head list; - raw_spinlock_t lock; - unsigned int nr_file_filters; + struct list_head list; + raw_spinlock_t lock; + unsigned int nr_file_filters; }; struct perf_addr_filter_range { - unsigned long start; - unsigned long size; + unsigned long start; + unsigned long size; }; -/** - * enum perf_event_state - the states of an event: +/* + * The normal states are: + * + * ACTIVE --. + * ^ | + * | | + * sched_{in,out}() | + * | | + * v | + * ,---> INACTIVE --+ <-. + * | | | + * | {dis,en}able() + * sched_in() | | + * | OFF <--' --+ + * | | + * `---> ERROR ------' + * + * That is: + * + * sched_in: INACTIVE -> {ACTIVE,ERROR} + * sched_out: ACTIVE -> INACTIVE + * disable: {ACTIVE,INACTIVE} -> OFF + * enable: {OFF,ERROR} -> INACTIVE + * + * Where {OFF,ERROR} are disabled states. + * + * Then we have the {EXIT,REVOKED,DEAD} states which are various shades of + * defunct events: + * + * - EXIT means task that the even was assigned to died, but child events + * still live, and further children can still be created. But the event + * itself will never be active again. It can only transition to + * {REVOKED,DEAD}; + * + * - REVOKED means the PMU the event was associated with is gone; all + * functionality is stopped but the event is still alive. Can only + * transition to DEAD; + * + * - DEAD event really is DYING tearing down state and freeing bits. + * */ enum perf_event_state { - PERF_EVENT_STATE_DEAD = -4, - PERF_EVENT_STATE_EXIT = -3, - PERF_EVENT_STATE_ERROR = -2, + PERF_EVENT_STATE_DEAD = -5, + PERF_EVENT_STATE_REVOKED = -4, /* pmu gone, must not touch */ + PERF_EVENT_STATE_EXIT = -3, /* task died, still inherit */ + PERF_EVENT_STATE_ERROR = -2, /* scheduling error, can enable */ PERF_EVENT_STATE_OFF = -1, PERF_EVENT_STATE_INACTIVE = 0, PERF_EVENT_STATE_ACTIVE = 1, @@ -588,10 +702,13 @@ typedef void (*perf_overflow_handler_t)(struct perf_event *, * PERF_EV_CAP_SIBLING: An event with this flag must be a group sibling and * cannot be a group leader. If an event with this flag is detached from the * group it is scheduled out and moved into an unrecoverable ERROR state. + * PERF_EV_CAP_READ_SCOPE: A CPU event that can be read from any CPU of the + * PMU scope where it is active. */ #define PERF_EV_CAP_SOFTWARE BIT(0) #define PERF_EV_CAP_READ_ACTIVE_PKG BIT(1) #define PERF_EV_CAP_SIBLING BIT(2) +#define PERF_EV_CAP_READ_SCOPE BIT(3) #define SWEVENT_HLIST_BITS 8 #define SWEVENT_HLIST_SIZE (1 << SWEVENT_HLIST_BITS) @@ -601,21 +718,43 @@ struct swevent_hlist { struct rcu_head rcu_head; }; -#define PERF_ATTACH_CONTEXT 0x01 -#define PERF_ATTACH_GROUP 0x02 -#define PERF_ATTACH_TASK 0x04 -#define PERF_ATTACH_TASK_DATA 0x08 -#define PERF_ATTACH_ITRACE 0x10 - +#define PERF_ATTACH_CONTEXT 0x0001 +#define PERF_ATTACH_GROUP 0x0002 +#define PERF_ATTACH_TASK 0x0004 +#define PERF_ATTACH_TASK_DATA 0x0008 +#define PERF_ATTACH_GLOBAL_DATA 0x0010 +#define PERF_ATTACH_SCHED_CB 0x0020 +#define PERF_ATTACH_CHILD 0x0040 +#define PERF_ATTACH_EXCLUSIVE 0x0080 +#define PERF_ATTACH_CALLCHAIN 0x0100 +#define PERF_ATTACH_ITRACE 0x0200 + +struct bpf_prog; struct perf_cgroup; struct perf_buffer; struct pmu_event_list { - raw_spinlock_t lock; - struct list_head list; + raw_spinlock_t lock; + struct list_head list; }; +/* + * event->sibling_list is modified whole holding both ctx->lock and ctx->mutex + * as such iteration must hold either lock. However, since ctx->lock is an IRQ + * safe lock, and is only held by the CPU doing the modification, having IRQs + * disabled is sufficient since it will hold-off the IPIs. + */ +#ifdef CONFIG_PROVE_LOCKING +# define lockdep_assert_event_ctx(event) \ + WARN_ON_ONCE(__lockdep_enabled && \ + (this_cpu_read(hardirqs_enabled) && \ + lockdep_is_held(&(event)->ctx->mutex) != LOCK_STATE_HELD)) +#else +# define lockdep_assert_event_ctx(event) +#endif + #define for_each_sibling_event(sibling, event) \ + lockdep_assert_event_ctx(event); \ if ((event)->group_leader == (event)) \ list_for_each_entry((sibling), &(event)->sibling_list, sibling_list) @@ -658,7 +797,13 @@ struct perf_event { /* The cumulative AND of all event_caps for events in this group. */ int group_caps; + unsigned int group_generation; struct perf_event *group_leader; + /* + * event->pmu will always point to pmu in which this event belongs. + * Whereas event->pmu_ctx->pmu may point to other pmu when group of + * different pmu events is created. + */ struct pmu *pmu; void *pmu_private; @@ -677,16 +822,6 @@ struct perf_event { u64 total_time_running; u64 tstamp; - /* - * timestamp shadows the actual context timing but it can - * be safely used in NMI interrupt context. It reflects the - * context time as it was when the event was last scheduled in. - * - * ctx_time already accounts for ctx->timestamp. Therefore to - * compute ctx_time for a sample, simply add perf_clock(). - */ - u64 shadow_ctx_time; - struct perf_event_attr attr; u16 header_size; u16 id_header_size; @@ -694,6 +829,12 @@ struct perf_event { struct hw_perf_event hw; struct perf_event_context *ctx; + /* + * event->pmu_ctx points to perf_event_pmu_context in which the event + * is added. This pmu_ctx can be of other pmu for sw event when that + * sw event is part of a group which also contains non-sw events. + */ + struct perf_event_pmu_context *pmu_ctx; atomic_long_t refcount; /* @@ -730,10 +871,14 @@ struct perf_event { struct fasync_struct *fasync; /* delayed work for NMIs and such */ - int pending_wakeup; - int pending_kill; - int pending_disable; - struct irq_work pending; + unsigned int pending_wakeup; + unsigned int pending_kill; + unsigned int pending_disable; + unsigned long pending_addr; /* SIGTRAP */ + struct irq_work pending_irq; + struct irq_work pending_disable_irq; + struct callback_head pending_task; + unsigned int pending_work; atomic_t event_limit; @@ -752,20 +897,20 @@ struct perf_event { struct pid_namespace *ns; u64 id; + atomic64_t lost_samples; + u64 (*clock)(void); perf_overflow_handler_t overflow_handler; void *overflow_handler_context; -#ifdef CONFIG_BPF_SYSCALL - perf_overflow_handler_t orig_overflow_handler; struct bpf_prog *prog; -#endif + u64 bpf_cookie; #ifdef CONFIG_EVENT_TRACING struct trace_event_call *tp_event; struct event_filter *filter; -#ifdef CONFIG_FUNCTION_TRACER +# ifdef CONFIG_FUNCTION_TRACER struct ftrace_ops ftrace_ops; -#endif +# endif #endif #ifdef CONFIG_CGROUP_PERF @@ -776,22 +921,90 @@ struct perf_event { void *security; #endif struct list_head sb_list; + struct list_head pmu_list; + + /* + * Certain events gets forwarded to another pmu internally by over- + * writing kernel copy of event->attr.type without user being aware + * of it. event->orig_type contains original 'type' requested by + * user. + */ + u32 orig_type; #endif /* CONFIG_PERF_EVENTS */ }; +/* + * ,-----------------------[1:n]------------------------. + * V V + * perf_event_context <-[1:n]-> perf_event_pmu_context <-[1:n]- perf_event + * | | + * `--[n:1]-> pmu <-[1:n]--' + * + * + * struct perf_event_pmu_context lifetime is refcount based and RCU freed + * (similar to perf_event_context). Locking is as if it were a member of + * perf_event_context; specifically: + * + * modification, both: ctx->mutex && ctx->lock + * reading, either: ctx->mutex || ctx->lock + * + * There is one exception to this; namely put_pmu_ctx() isn't always called + * with ctx->mutex held; this means that as long as we can guarantee the epc + * has events the above rules hold. + * + * Specificially, sys_perf_event_open()'s group_leader case depends on + * ctx->mutex pinning the configuration. Since we hold a reference on + * group_leader (through the filedesc) it can't go away, therefore it's + * associated pmu_ctx must exist and cannot change due to ctx->mutex. + * + * perf_event holds a refcount on perf_event_context + * perf_event holds a refcount on perf_event_pmu_context + */ +struct perf_event_pmu_context { + struct pmu *pmu; + struct perf_event_context *ctx; + + struct list_head pmu_ctx_entry; + + struct list_head pinned_active; + struct list_head flexible_active; + + /* Used to identify the per-cpu perf_event_pmu_context */ + unsigned int embedded : 1; + + unsigned int nr_events; + unsigned int nr_cgroups; + unsigned int nr_freq; + + atomic_t refcount; /* event <-> epc */ + struct rcu_head rcu_head; + + /* + * Set when one or more (plausibly active) event can't be scheduled + * due to pmu overcommit or pmu constraints, except tolerant to + * events not necessary to be active due to scheduling constraints, + * such as cgroups. + */ + int rotate_necessary; +}; + +static inline bool perf_pmu_ctx_is_active(struct perf_event_pmu_context *epc) +{ + return !list_empty(&epc->flexible_active) || !list_empty(&epc->pinned_active); +} struct perf_event_groups { - struct rb_root tree; - u64 index; + struct rb_root tree; + u64 index; }; + /** * struct perf_event_context - event context structure * * Used as a container for task events and CPU events as well: */ struct perf_event_context { - struct pmu *pmu; /* * Protect the states of the events in the list, * nr_active, and the list: @@ -804,26 +1017,20 @@ struct perf_event_context { */ struct mutex mutex; - struct list_head active_ctx_list; + struct list_head pmu_ctx_list; struct perf_event_groups pinned_groups; struct perf_event_groups flexible_groups; struct list_head event_list; - struct list_head pinned_active; - struct list_head flexible_active; - int nr_events; - int nr_active; + int nr_user; int is_active; + int nr_stat; int nr_freq; int rotate_disable; - /* - * Set when nr_events != nr_active, except tolerant to events not - * necessary to be active due to scheduling constraints, such as cgroups. - */ - int rotate_necessary; - refcount_t refcount; + + refcount_t refcount; /* event <-> ctx */ struct task_struct *task; /* @@ -831,6 +1038,7 @@ struct perf_event_context { */ u64 time; u64 timestamp; + u64 timeoffset; /* * These fields let us detect when two contexts have both @@ -843,38 +1051,85 @@ struct perf_event_context { #ifdef CONFIG_CGROUP_PERF int nr_cgroups; /* cgroup evts */ #endif - void *task_ctx_data; /* pmu specific data */ struct rcu_head rcu_head; -}; -/* - * Number of contexts where an event can trigger: - * task, softirq, hardirq, nmi. - */ -#define PERF_NR_CONTEXTS 4 + /* + * The count of events for which using the switch-out fast path + * should be avoided. + * + * Sum (event->pending_work + events with + * (attr->inherit && (attr->sample_type & PERF_SAMPLE_READ))) + * + * The SIGTRAP is targeted at ctx->task, as such it won't do changing + * that until the signal is delivered. + */ + local_t nr_no_switch_fast; +}; /** - * struct perf_event_cpu_context - per cpu event context structure + * struct perf_ctx_data - PMU specific data for a task + * @rcu_head: To avoid the race on free PMU specific data + * @refcount: To track users + * @global: To track system-wide users + * @ctx_cache: Kmem cache of PMU specific data + * @data: PMU specific data + * + * Currently, the struct is only used in Intel LBR call stack mode to + * save/restore the call stack of a task on context switches. + * + * The rcu_head is used to prevent the race on free the data. + * The data only be allocated when Intel LBR call stack mode is enabled. + * The data will be freed when the mode is disabled. + * The content of the data will only be accessed in context switch, which + * should be protected by rcu_read_lock(). + * + * Because of the alignment requirement of Intel Arch LBR, the Kmem cache + * is used to allocate the PMU specific data. The ctx_cache is to track + * the Kmem cache. + * + * Careful: Struct perf_ctx_data is added as a pointer in struct task_struct. + * When system-wide Intel LBR call stack mode is enabled, a buffer with + * constant size will be allocated for each task. + * Also, system memory consumption can further grow when the size of + * struct perf_ctx_data enlarges. */ -struct perf_cpu_context { - struct perf_event_context ctx; - struct perf_event_context *task_ctx; +struct perf_ctx_data { + struct rcu_head rcu_head; + refcount_t refcount; + int global; + struct kmem_cache *ctx_cache; + void *data; +}; + +struct perf_cpu_pmu_context { + struct perf_event_pmu_context epc; + struct perf_event_pmu_context *task_epc; + + struct list_head sched_cb_entry; + int sched_cb_usage; + int active_oncpu; int exclusive; + int pmu_disable_count; raw_spinlock_t hrtimer_lock; struct hrtimer hrtimer; ktime_t hrtimer_interval; unsigned int hrtimer_active; +}; + +/** + * 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 online; #ifdef CONFIG_CGROUP_PERF struct perf_cgroup *cgrp; - struct list_head cgrp_cpuctx_entry; #endif - int sched_cb_usage; - - int online; /* * Per-CPU storage for iterators used in visit_groups_merge. The default * storage is of size 2 to hold the CPU and any CPU event iterators. @@ -889,7 +1144,13 @@ struct perf_output_handle { struct perf_buffer *rb; unsigned long wakeup; unsigned long size; - u64 aux_flags; + union { + u64 flags; /* perf_output*() */ + u64 aux_flags; /* perf_aux_output*() */ + struct { + u64 skip_read : 1; + }; + }; union { void *addr; unsigned long head; @@ -912,6 +1173,8 @@ struct bpf_perf_event_data_kern { struct perf_cgroup_info { u64 time; u64 timestamp; + u64 timeoffset; + int active; }; struct perf_cgroup { @@ -936,6 +1199,8 @@ perf_cgroup_from_task(struct task_struct *task, struct perf_event_context *ctx) #ifdef CONFIG_PERF_EVENTS +extern struct perf_event_context *perf_cpu_task_ctx(void); + extern void *perf_aux_output_begin(struct perf_output_handle *handle, struct perf_event *event); extern void perf_aux_output_end(struct perf_output_handle *handle, @@ -947,15 +1212,13 @@ extern void perf_aux_output_flag(struct perf_output_handle *handle, u64 flags); extern void perf_event_itrace_started(struct perf_event *event); extern int perf_pmu_register(struct pmu *pmu, const char *name, int type); -extern void perf_pmu_unregister(struct pmu *pmu); +extern int perf_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 int perf_event_init_task(struct task_struct *child, u64 clone_flags); 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); @@ -975,65 +1238,107 @@ extern void perf_pmu_resched(struct pmu *pmu); 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); + int cpu, + struct task_struct *task, + perf_overflow_handler_t callback, + void *context); + extern void perf_pmu_migrate_context(struct pmu *pmu, - int src_cpu, int dst_cpu); -int perf_event_read_local(struct perf_event *event, u64 *value, - u64 *enabled, u64 *running); + int src_cpu, int dst_cpu); +extern int perf_event_read_local(struct perf_event *event, u64 *value, + u64 *enabled, u64 *running); extern u64 perf_event_read_value(struct perf_event *event, u64 *enabled, u64 *running); +extern struct perf_callchain_entry *perf_callchain(struct perf_event *event, struct pt_regs *regs); + +static inline bool branch_sample_no_flags(const struct perf_event *event) +{ + return event->attr.branch_sample_type & PERF_SAMPLE_BRANCH_NO_FLAGS; +} + +static inline bool branch_sample_no_cycles(const struct perf_event *event) +{ + return event->attr.branch_sample_type & PERF_SAMPLE_BRANCH_NO_CYCLES; +} + +static inline bool branch_sample_type(const struct perf_event *event) +{ + return event->attr.branch_sample_type & PERF_SAMPLE_BRANCH_TYPE_SAVE; +} + +static inline bool branch_sample_hw_index(const struct perf_event *event) +{ + return event->attr.branch_sample_type & PERF_SAMPLE_BRANCH_HW_INDEX; +} + +static inline bool branch_sample_priv(const struct perf_event *event) +{ + return event->attr.branch_sample_type & PERF_SAMPLE_BRANCH_PRIV_SAVE; +} + +static inline bool branch_sample_counters(const struct perf_event *event) +{ + return event->attr.branch_sample_type & PERF_SAMPLE_BRANCH_COUNTERS; +} + +static inline bool branch_sample_call_stack(const struct perf_event *event) +{ + return event->attr.branch_sample_type & PERF_SAMPLE_BRANCH_CALL_STACK; +} struct perf_sample_data { /* - * Fields set by perf_sample_data_init(), group so as to - * minimize the cachelines touched. + * Fields set by perf_sample_data_init() unconditionally, + * group so as to minimize the cachelines touched. */ - u64 addr; - struct perf_raw_record *raw; - struct perf_branch_stack *br_stack; + u64 sample_flags; u64 period; - u64 weight; - u64 txn; - union perf_mem_data_src data_src; + u64 dyn_size; /* - * The other fields, optionally {set,used} by - * perf_{prepare,output}_sample(). + * Fields commonly set by __perf_event_header__init_id(), + * group so as to minimize the cachelines touched. */ u64 type; - u64 ip; struct { u32 pid; u32 tid; } tid_entry; u64 time; u64 id; - u64 stream_id; struct { u32 cpu; u32 reserved; } cpu_entry; - struct perf_callchain_entry *callchain; - u64 aux_size; /* - * regs_user may point to task_pt_regs or to regs_user_copy, depending - * on arch details. + * The other fields, optionally {set,used} by + * perf_{prepare,output}_sample(). */ - struct perf_regs regs_user; - struct pt_regs regs_user_copy; + u64 ip; + struct perf_callchain_entry *callchain; + struct perf_raw_record *raw; + struct perf_branch_stack *br_stack; + u64 *br_stack_cntr; + union perf_sample_weight weight; + union perf_mem_data_src data_src; + u64 txn; + struct perf_regs regs_user; struct perf_regs regs_intr; u64 stack_user_size; - u64 phys_addr; + u64 stream_id; u64 cgroup; + u64 addr; + u64 phys_addr; + u64 data_page_size; + u64 code_page_size; + u64 aux_size; } ____cacheline_aligned; /* default value for data source */ @@ -1041,26 +1346,144 @@ struct perf_sample_data { PERF_MEM_S(LVL, NA) |\ PERF_MEM_S(SNOOP, NA) |\ PERF_MEM_S(LOCK, NA) |\ - PERF_MEM_S(TLB, NA)) + PERF_MEM_S(TLB, NA) |\ + PERF_MEM_S(LVLNUM, NA)) static inline void perf_sample_data_init(struct perf_sample_data *data, u64 addr, u64 period) { /* remaining struct members initialized in perf_prepare_sample() */ - data->addr = addr; - data->raw = NULL; - data->br_stack = NULL; + data->sample_flags = PERF_SAMPLE_PERIOD; data->period = period; - data->weight = 0; - data->data_src.val = PERF_MEM_NA; - data->txn = 0; + data->dyn_size = 0; + + if (addr) { + data->addr = addr; + data->sample_flags |= PERF_SAMPLE_ADDR; + } +} + +static inline void perf_sample_save_callchain(struct perf_sample_data *data, + struct perf_event *event, + struct pt_regs *regs) +{ + int size = 1; + + if (!(event->attr.sample_type & PERF_SAMPLE_CALLCHAIN)) + return; + if (WARN_ON_ONCE(data->sample_flags & PERF_SAMPLE_CALLCHAIN)) + return; + + data->callchain = perf_callchain(event, regs); + size += data->callchain->nr; + + data->dyn_size += size * sizeof(u64); + data->sample_flags |= PERF_SAMPLE_CALLCHAIN; +} + +static inline void perf_sample_save_raw_data(struct perf_sample_data *data, + struct perf_event *event, + struct perf_raw_record *raw) +{ + struct perf_raw_frag *frag = &raw->frag; + u32 sum = 0; + int size; + + if (!(event->attr.sample_type & PERF_SAMPLE_RAW)) + return; + if (WARN_ON_ONCE(data->sample_flags & PERF_SAMPLE_RAW)) + return; + + do { + sum += frag->size; + if (perf_raw_frag_last(frag)) + break; + frag = frag->next; + } while (1); + + size = round_up(sum + sizeof(u32), sizeof(u64)); + raw->size = size - sizeof(u32); + frag->pad = raw->size - sum; + + data->raw = raw; + data->dyn_size += size; + data->sample_flags |= PERF_SAMPLE_RAW; +} + +static inline bool has_branch_stack(struct perf_event *event) +{ + return event->attr.sample_type & PERF_SAMPLE_BRANCH_STACK; +} + +static inline void perf_sample_save_brstack(struct perf_sample_data *data, + struct perf_event *event, + struct perf_branch_stack *brs, + u64 *brs_cntr) +{ + int size = sizeof(u64); /* nr */ + + if (!has_branch_stack(event)) + return; + if (WARN_ON_ONCE(data->sample_flags & PERF_SAMPLE_BRANCH_STACK)) + return; + + if (branch_sample_hw_index(event)) + size += sizeof(u64); + + brs->nr = min_t(u16, event->attr.sample_max_stack, brs->nr); + + size += brs->nr * sizeof(struct perf_branch_entry); + + /* + * The extension space for counters is appended after the + * struct perf_branch_stack. It is used to store the occurrences + * of events of each branch. + */ + if (brs_cntr) + size += brs->nr * sizeof(u64); + + data->br_stack = brs; + data->br_stack_cntr = brs_cntr; + data->dyn_size += size; + data->sample_flags |= PERF_SAMPLE_BRANCH_STACK; +} + +static inline u32 perf_sample_data_size(struct perf_sample_data *data, + struct perf_event *event) +{ + u32 size = sizeof(struct perf_event_header); + + size += event->header_size + event->id_header_size; + size += data->dyn_size; + + return size; +} + +/* + * Clear all bitfields in the perf_branch_entry. + * The to and from fields are not cleared because they are + * systematically modified by caller. + */ +static inline void perf_clear_branch_entry_bitfields(struct perf_branch_entry *br) +{ + br->mispred = 0; + br->predicted = 0; + br->in_tx = 0; + br->abort = 0; + br->cycles = 0; + br->type = 0; + br->spec = PERF_BR_SPEC_NA; + br->reserved = 0; } extern void perf_output_sample(struct perf_output_handle *handle, struct perf_event_header *header, struct perf_sample_data *data, struct perf_event *event); -extern void perf_prepare_sample(struct perf_event_header *header, +extern void perf_prepare_sample(struct perf_sample_data *data, + struct perf_event *event, + struct pt_regs *regs); +extern void perf_prepare_header(struct perf_event_header *header, struct perf_sample_data *data, struct perf_event *event, struct pt_regs *regs); @@ -1082,9 +1505,11 @@ extern int perf_event_output(struct perf_event *event, static inline bool is_default_overflow_handler(struct perf_event *event) { - if (likely(event->overflow_handler == perf_event_output_forward)) + perf_overflow_handler_t overflow_handler = event->overflow_handler; + + if (likely(overflow_handler == perf_event_output_forward)) return true; - if (unlikely(event->overflow_handler == perf_event_output_backward)) + if (unlikely(overflow_handler == perf_event_output_backward)) return true; return false; } @@ -1128,7 +1553,7 @@ static inline int is_software_event(struct perf_event *event) */ static inline int in_software_context(struct perf_event *event) { - return event->ctx->pmu->task_ctx_nr == perf_sw_context; + return event->pmu_ctx->pmu->task_ctx_nr == perf_sw_context; } static inline int is_exclusive_pmu(struct pmu *pmu) @@ -1178,30 +1603,24 @@ DECLARE_PER_CPU(struct pt_regs, __perf_regs[4]); * which is guaranteed by us not actually scheduling inside other swevents * because those disable preemption. */ -static __always_inline void -perf_sw_event_sched(u32 event_id, u64 nr, u64 addr) +static __always_inline void __perf_sw_event_sched(u32 event_id, u64 nr, u64 addr) { - if (static_key_false(&perf_swevent_enabled[event_id])) { - struct pt_regs *regs = this_cpu_ptr(&__perf_regs[0]); + struct pt_regs *regs = this_cpu_ptr(&__perf_regs[0]); - perf_fetch_caller_regs(regs); - ___perf_sw_event(event_id, nr, regs, addr); - } + perf_fetch_caller_regs(regs); + ___perf_sw_event(event_id, nr, regs, addr); } extern struct static_key_false perf_sched_events; -static __always_inline bool -perf_sw_migrate_enabled(void) +static __always_inline bool __perf_sw_enabled(int swevt) { - if (static_key_false(&perf_swevent_enabled[PERF_COUNT_SW_CPU_MIGRATIONS])) - return true; - return false; + return static_key_false(&perf_swevent_enabled[swevt]); } static inline void perf_event_task_migrate(struct task_struct *task) { - if (perf_sw_migrate_enabled()) + if (__perf_sw_enabled(PERF_COUNT_SW_CPU_MIGRATIONS)) task->sched_migrated = 1; } @@ -1211,11 +1630,9 @@ static inline void perf_event_task_sched_in(struct task_struct *prev, if (static_branch_unlikely(&perf_sched_events)) __perf_event_task_sched_in(prev, task); - if (perf_sw_migrate_enabled() && task->sched_migrated) { - struct pt_regs *regs = this_cpu_ptr(&__perf_regs[0]); - - perf_fetch_caller_regs(regs); - ___perf_sw_event(PERF_COUNT_SW_CPU_MIGRATIONS, 1, regs, 0); + if (__perf_sw_enabled(PERF_COUNT_SW_CPU_MIGRATIONS) && + task->sched_migrated) { + __perf_sw_event_sched(PERF_COUNT_SW_CPU_MIGRATIONS, 1, 0); task->sched_migrated = 0; } } @@ -1223,7 +1640,15 @@ static inline void perf_event_task_sched_in(struct task_struct *prev, static inline void perf_event_task_sched_out(struct task_struct *prev, struct task_struct *next) { - perf_sw_event_sched(PERF_COUNT_SW_CONTEXT_SWITCHES, 1, 0); + if (__perf_sw_enabled(PERF_COUNT_SW_CONTEXT_SWITCHES)) + __perf_sw_event_sched(PERF_COUNT_SW_CONTEXT_SWITCHES, 1, 0); + +#ifdef CONFIG_CGROUP_PERF + if (__perf_sw_enabled(PERF_COUNT_SW_CGROUP_SWITCHES) && + perf_cgroup_from_task(prev, NULL) != + perf_cgroup_from_task(next, NULL)) + __perf_sw_event_sched(PERF_COUNT_SW_CGROUP_SWITCHES, 1, 0); +#endif if (static_branch_unlikely(&perf_sched_events)) __perf_event_task_sched_out(prev, next); @@ -1237,9 +1662,48 @@ extern void perf_event_bpf_event(struct bpf_prog *prog, enum perf_bpf_event_type type, u16 flags); -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); +#define PERF_GUEST_ACTIVE 0x01 +#define PERF_GUEST_USER 0x02 + +struct perf_guest_info_callbacks { + unsigned int (*state)(void); + unsigned long (*get_ip)(void); + unsigned int (*handle_intel_pt_intr)(void); +}; + +#ifdef CONFIG_GUEST_PERF_EVENTS + +extern struct perf_guest_info_callbacks __rcu *perf_guest_cbs; + +DECLARE_STATIC_CALL(__perf_guest_state, *perf_guest_cbs->state); +DECLARE_STATIC_CALL(__perf_guest_get_ip, *perf_guest_cbs->get_ip); +DECLARE_STATIC_CALL(__perf_guest_handle_intel_pt_intr, *perf_guest_cbs->handle_intel_pt_intr); + +static inline unsigned int perf_guest_state(void) +{ + return static_call(__perf_guest_state)(); +} + +static inline unsigned long perf_guest_get_ip(void) +{ + return static_call(__perf_guest_get_ip)(); +} + +static inline unsigned int perf_guest_handle_intel_pt_intr(void) +{ + return static_call(__perf_guest_handle_intel_pt_intr)(); +} + +extern void perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *cbs); +extern void perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *cbs); + +#else /* !CONFIG_GUEST_PERF_EVENTS: */ + +static inline unsigned int perf_guest_state(void) { return 0; } +static inline unsigned long perf_guest_get_ip(void) { return 0; } +static inline unsigned int perf_guest_handle_intel_pt_intr(void) { return 0; } + +#endif /* !CONFIG_GUEST_PERF_EVENTS */ extern void perf_event_exec(void); extern void perf_event_comm(struct task_struct *tsk, bool exec); @@ -1257,7 +1721,6 @@ extern void perf_callchain_kernel(struct perf_callchain_entry_ctx *entry, struct extern struct perf_callchain_entry * get_perf_callchain(struct pt_regs *regs, u32 init_nr, bool kernel, bool user, u32 max_stack, bool crosstask, bool add_mark); -extern struct perf_callchain_entry *perf_callchain(struct perf_event *event, struct pt_regs *regs); extern int get_callchain_buffers(int max_stack); extern void put_callchain_buffers(void); extern struct perf_callchain_entry *get_callchain_entry(int *rctx); @@ -1270,6 +1733,7 @@ static inline int perf_callchain_store_context(struct perf_callchain_entry_ctx * { if (ctx->contexts < sysctl_perf_event_max_contexts_per_stack) { struct perf_callchain_entry *entry = ctx->entry; + entry->ip[entry->nr++] = ip; ++ctx->contexts; return 0; @@ -1283,6 +1747,7 @@ static inline int perf_callchain_store(struct perf_callchain_entry_ctx *ctx, u64 { if (ctx->nr < ctx->max_stack && !ctx->contexts_maxed) { struct perf_callchain_entry *entry = ctx->entry; + entry->ip[entry->nr++] = ip; ++ctx->nr; return 0; @@ -1292,19 +1757,10 @@ static inline int perf_callchain_store(struct perf_callchain_entry_ctx *ctx, u64 } extern int sysctl_perf_event_paranoid; -extern int sysctl_perf_event_mlock; extern int sysctl_perf_event_sample_rate; -extern int sysctl_perf_cpu_time_max_percent; extern void perf_sample_event_took(u64 sample_len_ns); -int perf_proc_update_handler(struct ctl_table *table, int write, - void *buffer, size_t *lenp, loff_t *ppos); -int perf_cpu_time_max_percent_handler(struct ctl_table *table, int write, - void *buffer, size_t *lenp, loff_t *ppos); -int perf_event_max_stack_handler(struct ctl_table *table, int write, - void *buffer, size_t *lenp, loff_t *ppos); - /* Access to perf_event_open(2) syscall. */ #define PERF_SECURITY_OPEN 0 @@ -1318,30 +1774,26 @@ static inline int perf_is_paranoid(void) return sysctl_perf_event_paranoid > -1; } -static inline int perf_allow_kernel(struct perf_event_attr *attr) -{ - if (sysctl_perf_event_paranoid > 1 && !perfmon_capable()) - return -EACCES; - - return security_perf_event_open(attr, PERF_SECURITY_KERNEL); -} +extern int perf_allow_kernel(void); -static inline int perf_allow_cpu(struct perf_event_attr *attr) +static inline int perf_allow_cpu(void) { if (sysctl_perf_event_paranoid > 0 && !perfmon_capable()) return -EACCES; - return security_perf_event_open(attr, PERF_SECURITY_CPU); + return security_perf_event_open(PERF_SECURITY_CPU); } -static inline int perf_allow_tracepoint(struct perf_event_attr *attr) +static inline int perf_allow_tracepoint(void) { if (sysctl_perf_event_paranoid > -1 && !perfmon_capable()) return -EPERM; - return security_perf_event_open(attr, PERF_SECURITY_TRACEPOINT); + return security_perf_event_open(PERF_SECURITY_TRACEPOINT); } +extern int perf_exclude_event(struct perf_event *event, struct pt_regs *regs); + extern void perf_event_init(void); extern void perf_tp_event(u16 event_type, u64 count, void *record, int entry_size, struct pt_regs *regs, @@ -1349,19 +1801,34 @@ extern void perf_tp_event(u16 event_type, u64 count, void *record, struct task_struct *task); extern void perf_bp_event(struct perf_event *event, void *data); -#ifndef perf_misc_flags -# define perf_misc_flags(regs) \ +extern unsigned long perf_misc_flags(struct perf_event *event, struct pt_regs *regs); +extern unsigned long perf_instruction_pointer(struct perf_event *event, + struct pt_regs *regs); + +#ifndef perf_arch_misc_flags +# define perf_arch_misc_flags(regs) \ (user_mode(regs) ? PERF_RECORD_MISC_USER : PERF_RECORD_MISC_KERNEL) -# define perf_instruction_pointer(regs) instruction_pointer(regs) +# define perf_arch_instruction_pointer(regs) instruction_pointer(regs) #endif #ifndef perf_arch_bpf_user_pt_regs # define perf_arch_bpf_user_pt_regs(regs) regs #endif -static inline bool has_branch_stack(struct perf_event *event) +#ifndef perf_arch_guest_misc_flags +static inline unsigned long perf_arch_guest_misc_flags(struct pt_regs *regs) { - return event->attr.sample_type & PERF_SAMPLE_BRANCH_STACK; + unsigned long guest_state = perf_guest_state(); + + if (!(guest_state & PERF_GUEST_ACTIVE)) + return 0; + + if (guest_state & PERF_GUEST_USER) + return PERF_RECORD_MISC_GUEST_USER; + else + return PERF_RECORD_MISC_GUEST_KERNEL; } +# define perf_arch_guest_misc_flags(regs) perf_arch_guest_misc_flags(regs) +#endif static inline bool needs_branch_stack(struct perf_event *event) { @@ -1370,7 +1837,14 @@ static inline bool needs_branch_stack(struct perf_event *event) static inline bool has_aux(struct perf_event *event) { - return event->pmu->setup_aux; + return event->pmu && event->pmu->setup_aux; +} + +static inline bool has_aux_action(struct perf_event *event) +{ + return event->attr.aux_sample_size || + event->attr.aux_pause || + event->attr.aux_resume; } static inline bool is_write_backward(struct perf_event *event) @@ -1397,20 +1871,32 @@ perf_event_addr_filters(struct perf_event *event) return ifh; } +static inline struct fasync_struct **perf_event_fasync(struct perf_event *event) +{ + /* Only the parent has fasync state */ + if (event->parent) + event = event->parent; + return &event->fasync; +} + extern void perf_event_addr_filters_sync(struct perf_event *event); +extern void perf_report_aux_output_id(struct perf_event *event, u64 hw_id); extern int perf_output_begin(struct perf_output_handle *handle, + struct perf_sample_data *data, struct perf_event *event, unsigned int size); extern int perf_output_begin_forward(struct perf_output_handle *handle, - struct perf_event *event, - unsigned int size); + struct perf_sample_data *data, + struct perf_event *event, + unsigned int size); extern int perf_output_begin_backward(struct perf_output_handle *handle, + struct perf_sample_data *data, struct perf_event *event, unsigned int size); extern void perf_output_end(struct perf_output_handle *handle); extern unsigned int perf_output_copy(struct perf_output_handle *handle, - const void *buf, unsigned int len); + const void *buf, unsigned int len); extern unsigned int perf_output_skip(struct perf_output_handle *handle, unsigned int len); extern long perf_output_copy_aux(struct perf_output_handle *aux_handle, @@ -1427,7 +1913,9 @@ extern void perf_event_task_tick(void); extern int perf_event_account_interrupt(struct perf_event *event); extern int perf_event_period(struct perf_event *event, u64 value); extern u64 perf_event_pause(struct perf_event *event, bool reset); + #else /* !CONFIG_PERF_EVENTS: */ + static inline void * perf_aux_output_begin(struct perf_output_handle *handle, struct perf_event *event) { return NULL; } @@ -1447,7 +1935,8 @@ perf_event_task_sched_in(struct task_struct *prev, 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 int perf_event_init_task(struct task_struct *child, + u64 clone_flags) { 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) { } @@ -1476,15 +1965,8 @@ static inline int perf_event_refresh(struct perf_event *event, int refresh) static inline void perf_sw_event(u32 event_id, u64 nr, struct pt_regs *regs, u64 addr) { } static inline void -perf_sw_event_sched(u32 event_id, u64 nr, u64 addr) { } -static inline void perf_bp_event(struct perf_event *event, void *data) { } -static inline int perf_register_guest_info_callbacks -(struct perf_guest_info_callbacks *callbacks) { return 0; } -static inline int perf_unregister_guest_info_callbacks -(struct perf_guest_info_callbacks *callbacks) { return 0; } - static inline void perf_event_mmap(struct vm_area_struct *vma) { } typedef int (perf_ksymbol_get_name_f)(char *name, int name_len, void *data); @@ -1511,15 +1993,14 @@ static inline void perf_event_disable(struct perf_event *event) { } static inline int __perf_event_disable(void *info) { return -1; } static inline void perf_event_task_tick(void) { } static inline int perf_event_release_kernel(struct perf_event *event) { return 0; } -static inline int perf_event_period(struct perf_event *event, u64 value) -{ - return -EINVAL; -} -static inline u64 perf_event_pause(struct perf_event *event, bool reset) -{ - return 0; -} -#endif +static inline int +perf_event_period(struct perf_event *event, u64 value) { return -EINVAL; } +static inline u64 +perf_event_pause(struct perf_event *event, bool reset) { return 0; } +static inline int +perf_exclude_event(struct perf_event *event, struct pt_regs *regs) { return 0; } + +#endif /* !CONFIG_PERF_EVENTS */ #if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_CPU_SUP_INTEL) extern void perf_restore_debug_store(void); @@ -1527,24 +2008,31 @@ extern void perf_restore_debug_store(void); static inline void perf_restore_debug_store(void) { } #endif -static __always_inline bool perf_raw_frag_last(const struct perf_raw_frag *frag) -{ - return frag->pad < sizeof(u64); -} - -#define perf_output_put(handle, x) perf_output_copy((handle), &(x), sizeof(x)) +#define perf_output_put(handle, x) perf_output_copy((handle), &(x), sizeof(x)) struct perf_pmu_events_attr { - struct device_attribute attr; - u64 id; - const char *event_str; + struct device_attribute attr; + u64 id; + const char *event_str; }; struct perf_pmu_events_ht_attr { - struct device_attribute attr; - u64 id; - const char *event_str_ht; - const char *event_str_noht; + struct device_attribute attr; + u64 id; + const char *event_str_ht; + const char *event_str_noht; +}; + +struct perf_pmu_events_hybrid_attr { + struct device_attribute attr; + u64 id; + const char *event_str; + u64 pmu_type; +}; + +struct perf_pmu_format_hybrid_attr { + struct device_attribute attr; + u64 pmu_type; }; ssize_t perf_event_sysfs_show(struct device *dev, struct device_attribute *attr, @@ -1563,7 +2051,13 @@ static struct perf_pmu_events_attr _var = { \ .event_str = _str, \ }; -#define PMU_FORMAT_ATTR(_name, _format) \ +#define PMU_EVENT_ATTR_ID(_name, _show, _id) \ + (&((struct perf_pmu_events_attr[]) { \ + { .attr = __ATTR(_name, 0444, _show, NULL), \ + .id = _id, } \ + })[0].attr.attr) + +#define PMU_FORMAT_ATTR_SHOW(_name, _format) \ static ssize_t \ _name##_show(struct device *dev, \ struct device_attribute *attr, \ @@ -1572,20 +2066,51 @@ _name##_show(struct device *dev, \ BUILD_BUG_ON(sizeof(_format) >= PAGE_SIZE); \ return sprintf(page, _format "\n"); \ } \ + +#define PMU_FORMAT_ATTR(_name, _format) \ + PMU_FORMAT_ATTR_SHOW(_name, _format) \ \ static struct device_attribute format_attr_##_name = __ATTR_RO(_name) /* Performance counter hotplug functions */ #ifdef CONFIG_PERF_EVENTS -int perf_event_init_cpu(unsigned int cpu); -int perf_event_exit_cpu(unsigned int cpu); +extern int perf_event_init_cpu(unsigned int cpu); +extern int perf_event_exit_cpu(unsigned int cpu); #else -#define perf_event_init_cpu NULL -#define perf_event_exit_cpu NULL +# define perf_event_init_cpu NULL +# define perf_event_exit_cpu NULL #endif -extern void __weak arch_perf_update_userpage(struct perf_event *event, - struct perf_event_mmap_page *userpg, - u64 now); +extern void arch_perf_update_userpage(struct perf_event *event, + struct perf_event_mmap_page *userpg, + u64 now); + +/* + * Snapshot branch stack on software events. + * + * Branch stack can be very useful in understanding software events. For + * example, when a long function, e.g. sys_perf_event_open, returns an + * errno, it is not obvious why the function failed. Branch stack could + * provide very helpful information in this type of scenarios. + * + * On software event, it is necessary to stop the hardware branch recorder + * fast. Otherwise, the hardware register/buffer will be flushed with + * entries of the triggering event. Therefore, static call is used to + * stop the hardware recorder. + */ + +/* + * cnt is the number of entries allocated for entries. + * Return number of entries copied to . + */ +typedef int (perf_snapshot_branch_stack_t)(struct perf_branch_entry *entries, + unsigned int cnt); +DECLARE_STATIC_CALL(perf_snapshot_branch_stack, perf_snapshot_branch_stack_t); + +#ifndef PERF_NEEDS_LOPWR_CB +static inline void perf_lopwr_cb(bool mode) +{ +} +#endif #endif /* _LINUX_PERF_EVENT_H */ |