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Subject[tip:perf/core] perf bpf: Add bpf_map() helper
Commit-ID:  b45d5511aa9029264740e2353ad7faf3cd444703
Gitweb: https://git.kernel.org/tip/b45d5511aa9029264740e2353ad7faf3cd444703
Author: Arnaldo Carvalho de Melo <acme@redhat.com>
AuthorDate: Thu, 24 Jan 2019 15:01:46 +0100
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Fri, 25 Jan 2019 15:12:10 +0100

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>
---
tools/perf/include/bpf/bpf.h | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/tools/perf/include/bpf/bpf.h b/tools/perf/include/bpf/bpf.h
index e667577207dc..0482028c1d11 100644
--- 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
\
 
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