summaryrefslogtreecommitdiffstats
path: root/kernel/events/internal.h
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/events/internal.h')
-rw-r--r--kernel/events/internal.h33
1 files changed, 33 insertions, 0 deletions
diff --git a/kernel/events/internal.h b/kernel/events/internal.h
index 569b218782ad..9f6ce9ba4a04 100644
--- a/kernel/events/internal.h
+++ b/kernel/events/internal.h
@@ -27,6 +27,7 @@ struct ring_buffer {
local_t lost; /* nr records lost */
long watermark; /* wakeup watermark */
+ long aux_watermark;
/* poll crap */
spinlock_t event_lock;
struct list_head event_list;
@@ -35,6 +36,20 @@ struct ring_buffer {
unsigned long mmap_locked;
struct user_struct *mmap_user;
+ /* AUX area */
+ local_t aux_head;
+ local_t aux_nest;
+ local_t aux_wakeup;
+ unsigned long aux_pgoff;
+ int aux_nr_pages;
+ int aux_overwrite;
+ atomic_t aux_mmap_count;
+ unsigned long aux_mmap_locked;
+ void (*free_aux)(void *);
+ atomic_t aux_refcount;
+ void **aux_pages;
+ void *aux_priv;
+
struct perf_event_mmap_page *user_page;
void *data_pages[0];
};
@@ -43,6 +58,19 @@ extern void rb_free(struct ring_buffer *rb);
extern struct ring_buffer *
rb_alloc(int nr_pages, long watermark, int cpu, int flags);
extern void perf_event_wakeup(struct perf_event *event);
+extern int rb_alloc_aux(struct ring_buffer *rb, struct perf_event *event,
+ pgoff_t pgoff, int nr_pages, long watermark, int flags);
+extern void rb_free_aux(struct ring_buffer *rb);
+extern struct ring_buffer *ring_buffer_get(struct perf_event *event);
+extern void ring_buffer_put(struct ring_buffer *rb);
+
+static inline bool rb_has_aux(struct ring_buffer *rb)
+{
+ return !!rb->aux_nr_pages;
+}
+
+void perf_event_aux_event(struct perf_event *event, unsigned long head,
+ unsigned long size, u64 flags);
extern void
perf_event_header__init_id(struct perf_event_header *header,
@@ -81,6 +109,11 @@ static inline unsigned long perf_data_size(struct ring_buffer *rb)
return rb->nr_pages << (PAGE_SHIFT + page_order(rb));
}
+static inline unsigned long perf_aux_size(struct ring_buffer *rb)
+{
+ return rb->aux_nr_pages << PAGE_SHIFT;
+}
+
#define DEFINE_OUTPUT_COPY(func_name, memcpy_func) \
static inline unsigned long \
func_name(struct perf_output_handle *handle, \