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authorJani Nikula <[email protected]>2022-08-29 14:44:38 +0300
committerJani Nikula <[email protected]>2022-08-29 15:14:59 +0300
commit917bda9ab155032a02be1a57ebd4d949ae9e1528 (patch)
tree7758d62783f5fb81777c37d0ad4e26eea6312c0f /tools/perf/tests/bpf-script-example.c
parent95086cb969b2cb8abe4984457f219ec70d24052e (diff)
parent2c2d7a67defa198a8b8148dbaddc9e5554efebc8 (diff)
Merge drm/drm-next into drm-intel-next
Sync drm-intel-next with v6.0-rc as well as recent drm-intel-gt-next. Since drm-next does not have commit f0c70d41e4e8 ("drm/i915/guc: remove runtime info printing from time stamp logging") yet, only drm-intel-gt-next, will need to do that as part of the merge here to build. Signed-off-by: Jani Nikula <[email protected]>
Diffstat (limited to 'tools/perf/tests/bpf-script-example.c')
-rw-r--r--tools/perf/tests/bpf-script-example.c35
1 files changed, 23 insertions, 12 deletions
diff --git a/tools/perf/tests/bpf-script-example.c b/tools/perf/tests/bpf-script-example.c
index ab4b98b3165d..7981c69ed1b4 100644
--- a/tools/perf/tests/bpf-script-example.c
+++ b/tools/perf/tests/bpf-script-example.c
@@ -17,20 +17,31 @@ static void *(*bpf_map_lookup_elem)(void *map, void *key) =
static void *(*bpf_map_update_elem)(void *map, void *key, void *value, int flags) =
(void *) BPF_FUNC_map_update_elem;
-struct bpf_map_def {
- unsigned int type;
- unsigned int key_size;
- unsigned int value_size;
- unsigned int max_entries;
-};
+/*
+ * Following macros are taken from tools/lib/bpf/bpf_helpers.h,
+ * and are used to create BTF defined maps. It is easier to take
+ * 2 simple macros, than being able to include above header in
+ * runtime.
+ *
+ * __uint - defines integer attribute of BTF map definition,
+ * Such attributes are represented using a pointer to an array,
+ * in which dimensionality of array encodes specified integer
+ * value.
+ *
+ * __type - defines pointer variable with typeof(val) type for
+ * attributes like key or value, which will be defined by the
+ * size of the type.
+ */
+#define __uint(name, val) int (*name)[val]
+#define __type(name, val) typeof(val) *name
#define SEC(NAME) __attribute__((section(NAME), used))
-struct bpf_map_def SEC("maps") flip_table = {
- .type = BPF_MAP_TYPE_ARRAY,
- .key_size = sizeof(int),
- .value_size = sizeof(int),
- .max_entries = 1,
-};
+struct {
+ __uint(type, BPF_MAP_TYPE_ARRAY);
+ __uint(max_entries, 1);
+ __type(key, int);
+ __type(value, int);
+} flip_table SEC(".maps");
SEC("func=do_epoll_wait")
int bpf_func__SyS_epoll_pwait(void *ctx)