tools headers UAPI: Add new macros for mem_hops field to perf_event.h

Add new macros for mem_hops field which can be used to represent
remote-node, socket and board level details.

Currently the code had macro for HOPS_0 which, corresponds to data
coming from another core but same node.  Add new macros for HOPS_1 to
HOPS_3 to represent remote-node, socket and board level data.

Also add corresponding strings in the mem_hops array to represent
mem_hop field data in perf_mem__lvl_scnprintf function

Incase mem_hops field is used, PERF_MEM_LVLNUM field also need to be set
inorder to represent the data source. Hence printing data source via
PERF_MEM_LVL field can be skip in that scenario.

For ex: Encodings for mem_hops fields with L2 cache:

  L2                      - local L2
  L2 | REMOTE | HOPS_0    - remote core, same node L2
  L2 | REMOTE | HOPS_1    - remote node, same socket L2
  L2 | REMOTE | HOPS_2    - remote socket, same board L2
  L2 | REMOTE | HOPS_3    - remote board L2

Signed-off-by: Kajol Jain <[email protected]>
Acked-by: Peter Zijlstra (Intel) <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Alexei Starovoitov <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Athira Jajeev <[email protected]>
Cc: Daniel Borkmann <[email protected]>
Cc: Jin Yao <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Kan Liang <[email protected]>
Cc: Madhavan Srinivasan <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Nageswara R Sastry <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Song Liu <[email protected]>
Cc: [email protected]
Link: http://lore.kernel.org/lkml/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

1 files changed, 4 insertions, 1 deletions

diff --git a/tools/include/uapi/linux/perf_event.h b/tools/include/uapi/linux/perf_event.h
index bd8860eeb291..4cd39aaccbe7 100644
--- a/tools/include/uapi/linux/perf_event.h
+++ b/tools/include/uapi/linux/perf_event.h
@@ -1332,7 +1332,10 @@ union perf_mem_data_src {
 
 /* hop level */
 #define PERF_MEM_HOPS_0		0x01 /* remote core, same node */
-/* 2-7 available */
+#define PERF_MEM_HOPS_1         0x02 /* remote node, same socket */
+#define PERF_MEM_HOPS_2         0x03 /* remote socket, same board */
+#define PERF_MEM_HOPS_3         0x04 /* remote board */
+/* 5-7 available */
 #define PERF_MEM_HOPS_SHIFT	43
 
 #define PERF_MEM_S(a, s) \