perf: Dynamic pmu types

[mirror_ubuntu-hirsute-kernel.git] / include / linux / perf_event.h

diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 40150f345982cd4fd40e8b80470505e569f05b03..21206d27466bba15ea832dbca470952cf30b69a5 100644 (file)
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -215,8 +215,9 @@ struct perf_event_attr {
                                 */
                                precise_ip     :  2, /* skid constraint       */
                                mmap_data      :  1, /* non-exec mmap data    */
+                               sample_id_all  :  1, /* sample_type all events */
 
-                               __reserved_1   : 46;
+                               __reserved_1   : 45;
 
        union {
                __u32           wakeup_events;    /* wakeup every n events */
@@ -327,6 +328,15 @@ struct perf_event_header {
 enum perf_event_type {
 
        /*
+        * If perf_event_attr.sample_id_all is set then all event types will
+        * have the sample_type selected fields related to where/when
+        * (identity) an event took place (TID, TIME, ID, CPU, STREAM_ID)
+        * described in PERF_RECORD_SAMPLE below, it will be stashed just after
+        * the perf_event_header and the fields already present for the existing
+        * fields, i.e. at the end of the payload. That way a newer perf.data
+        * file will be supported by older perf tools, with these new optional
+        * fields being ignored.
+        *
         * The MMAP events record the PROT_EXEC mappings so that we can
         * correlate userspace IPs to code. They have the following structure:
         *
@@ -578,6 +588,9 @@ struct perf_event;
 struct pmu {
        struct list_head                entry;
 
+       char                            *name;
+       int                             type;
+
        int * __percpu                  pmu_disable_count;
        struct perf_cpu_context * __percpu pmu_cpu_context;
        int                             task_ctx_nr;
@@ -758,6 +771,9 @@ struct perf_event {
        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;
@@ -850,6 +866,7 @@ struct perf_event_context {
        int                             nr_active;
        int                             is_active;
        int                             nr_stat;
+       int                             rotate_disable;
        atomic_t                        refcount;
        struct task_struct              *task;
 
@@ -886,6 +903,7 @@ struct perf_cpu_context {
        int                             exclusive;
        struct list_head                rotation_list;
        int                             jiffies_interval;
+       struct pmu                      *active_pmu;
 };
 
 struct perf_output_handle {
@@ -901,27 +919,13 @@ struct perf_output_handle {
 
 #ifdef CONFIG_PERF_EVENTS
 
-extern int perf_pmu_register(struct pmu *pmu);
+extern int perf_pmu_register(struct pmu *pmu, char *name, int type);
 extern void perf_pmu_unregister(struct pmu *pmu);
 
 extern int perf_num_counters(void);
 extern const char *perf_pmu_name(void);
 extern void __perf_event_task_sched_in(struct task_struct *task);
 extern void __perf_event_task_sched_out(struct task_struct *task, struct task_struct *next);
-
-extern atomic_t perf_task_events;
-
-static inline void perf_event_task_sched_in(struct task_struct *task)
-{
-       COND_STMT(&perf_task_events, __perf_event_task_sched_in(task));
-}
-
-static inline
-void perf_event_task_sched_out(struct task_struct *task, struct task_struct *next)
-{
-       COND_STMT(&perf_task_events, __perf_event_task_sched_out(task, 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);
@@ -982,6 +986,11 @@ extern int perf_event_overflow(struct perf_event *event, int nmi,
                                 struct perf_sample_data *data,
                                 struct pt_regs *regs);
 
+static inline bool is_sampling_event(struct perf_event *event)
+{
+       return event->attr.sample_period != 0;
+}
+
 /*
  * Return 1 for a software event, 0 for a hardware event
  */
@@ -1030,6 +1039,21 @@ have_event:
        __perf_sw_event(event_id, nr, nmi, regs, addr);
 }
 
+extern atomic_t perf_task_events;
+
+static inline void perf_event_task_sched_in(struct task_struct *task)
+{
+       COND_STMT(&perf_task_events, __perf_event_task_sched_in(task));
+}
+
+static inline
+void perf_event_task_sched_out(struct task_struct *task, struct task_struct *next)
+{
+       perf_sw_event(PERF_COUNT_SW_CONTEXT_SWITCHES, 1, 1, NULL, 0);
+
+       COND_STMT(&perf_task_events, __perf_event_task_sched_out(task, next));
+}
+
 extern void perf_event_mmap(struct vm_area_struct *vma);
 extern struct perf_guest_info_callbacks *perf_guest_cbs;
 extern int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);