perf bpf: Add bpf_map() helper

To make the declaration of maps more compact, the following patches will
make use of it.

Standardizing on it will allow to add the BTF details, i.e.
BPF_ANNOTATE_KV_PAIR() (tools/testing/selftests/bpf/bpf_helpers.h)
transparently.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Martin KaFai Lau <kafai@fb.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Cc: Yonghong Song <yhs@fb.com>
Link: https://lkml.kernel.org/n/tip-h3q9rxxkbzetgnbro5rclqft@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/include/bpf/bpf.h b/tools/perf/include/bpf/bpf.h
index e667577..0482028 100644 (file)
--- a/tools/perf/include/bpf/bpf.h
+++ b/tools/perf/include/bpf/bpf.h
@@ -18,6 +18,14 @@ struct bpf_map {
         unsigned int numa_node;
 };
 
+#define bpf_map(name, _type, type_key, type_val, _max_entries) \
+struct bpf_map SEC("maps") name = {                            \
+       .type        = BPF_MAP_TYPE_##_type,                    \
+       .key_size    = sizeof(type_key),                        \
+       .value_size  = sizeof(type_val),                        \
+       .max_entries = _max_entries,                            \
+}
+
 /*
  * FIXME: this should receive .max_entries as a parameter, as careful
  *       tuning of these limits is needed to avoid hitting limits that