[tip:perf/core] perf/core: Prepare perf_event.h for new types: 'perf_kprobe' and 'perf_uprobe'

[tip-bot for Song Liu]

Commit-ID:  65074d43fc77bcae32776724b7fa2696923c78e4
Gitweb:     https://git.kernel.org/tip/65074d43fc77bcae32776724b7fa2696923c78e4
Author:     Song Liu <songliubraving@xxxxxx>
AuthorDate: Wed, 6 Dec 2017 14:45:13 -0800
Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Tue, 6 Feb 2018 10:18:04 +0100

perf/core: Prepare perf_event.h for new types: 'perf_kprobe' and 'perf_uprobe'

Two new perf types, perf_kprobe and perf_uprobe, will be added to allow
creating [k,u]probe with perf_event_open. These [k,u]probe are associated
with the file decriptor created by perf_event_open(), thus are easy to
clean when the file descriptor is destroyed.

kprobe_func and uprobe_path are added to union config1 for pointers to
function name for kprobe or binary path for uprobe.

kprobe_addr and probe_offset are added to union config2 for kernel
address (when kprobe_func is NULL), or [k,u]probe offset.

Signed-off-by: Song Liu <songliubraving@xxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Reviewed-by: Yonghong Song <yhs@xxxxxx>
Reviewed-by: Josef Bacik <jbacik@xxxxxx>
Acked-by: Alexei Starovoitov <ast@xxxxxxxxxx>
Cc: <daniel@xxxxxxxxxxxxx>
Cc: <davem@xxxxxxxxxxxxx>
Cc: <kernel-team@xxxxxx>
Cc: <rostedt@xxxxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/20171206224518.3598254-4-songliubraving@xxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 include/uapi/linux/perf_event.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h
index c77c9a2..5d49cfc 100644
--- a/include/uapi/linux/perf_event.h
+++ b/include/uapi/linux/perf_event.h
@@ -380,10 +380,14 @@ struct perf_event_attr {
 	__u32			bp_type;
 	union {
 		__u64		bp_addr;
+		__u64		kprobe_func; /* for perf_kprobe */
+		__u64		uprobe_path; /* for perf_uprobe */
 		__u64		config1; /* extension of config */
 	};
 	union {
 		__u64		bp_len;
+		__u64		kprobe_addr; /* when kprobe_func == NULL */
+		__u64		probe_offset; /* for perf_[k,u]probe */
 		__u64		config2; /* extension of config1 */
 	};
 	__u64	branch_sample_type; /* enum perf_branch_sample_type */