Merge branch 'perf/urgent' into perf/core

[linux-flexiantxendom0-natty.git] / include / linux / perf_event.h

diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 4f1279e..30e50e2 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:
         *
@@ -758,6 +768,9 @@ 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;
@@ -970,6 +983,11 @@ 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
  */