diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/perf_event.h | 17 | ||||
| -rw-r--r-- | include/uapi/linux/perf_event.h | 16 |
2 files changed, 33 insertions, 0 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index 401554074de9..5a94f6d6fa91 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -284,6 +284,18 @@ struct pmu { * Return the count value for a counter. */ u64 (*count) (struct perf_event *event); /*optional*/ + + /* + * Set up pmu-private data structures for an AUX area + */ + void *(*setup_aux) (int cpu, void **pages, + int nr_pages, bool overwrite); + /* optional */ + + /* + * Free pmu-private AUX data structures + */ + void (*free_aux) (void *aux); /* optional */ }; /** @@ -862,6 +874,11 @@ static inline bool needs_branch_stack(struct perf_event *event) return event->attr.branch_sample_type != 0; } +static inline bool has_aux(struct perf_event *event) +{ + return event->pmu->setup_aux; +} + 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); diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h index 86c44ae66d43..6c5013a71714 100644 --- a/include/uapi/linux/perf_event.h +++ b/include/uapi/linux/perf_event.h @@ -530,6 +530,22 @@ struct perf_event_mmap_page { __u64 data_tail; /* user-space written tail */ __u64 data_offset; /* where the buffer starts */ __u64 data_size; /* data buffer size */ + + /* + * AUX area is defined by aux_{offset,size} fields that should be set + * by the userspace, so that + * + * aux_offset >= data_offset + data_size + * + * prior to mmap()ing it. Size of the mmap()ed area should be aux_size. + * + * Ring buffer pointers aux_{head,tail} have the same semantics as + * data_{head,tail} and same ordering rules apply. + */ + __u64 aux_head; + __u64 aux_tail; + __u64 aux_offset; + __u64 aux_size; }; #define PERF_RECORD_MISC_CPUMODE_MASK (7 << 0) |