linux-kernel - [PATCH] perf docs: description of header HEADER_BPF_PROG_INFO and HEADER_BPF

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Message-ID: <20190521064406.2498925-1-songliubraving@fb.com>
Date:   Mon, 20 May 2019 23:44:06 -0700
From:   Song Liu <songliubraving@...com>
To:     <linux-kernel@...r.kernel.org>
CC:     <peterz@...radead.org>, <acme@...hat.com>, <jolsa@...nel.org>,
        Song Liu <songliubraving@...com>
Subject: [PATCH] perf docs: description of header HEADER_BPF_PROG_INFO and HEADER_BPF_BTF

This patch addes description of HEADER_BPF_PROG_INFO and HEADER_BPF_BTF to
perf.data-file-format.txt.

Signed-off-by: Song Liu <songliubraving@...com>
---
 .../perf/Documentation/perf.data-file-format.txt | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/tools/perf/Documentation/perf.data-file-format.txt b/tools/perf/Documentation/perf.data-file-format.txt
index 6967e9b02be5..ab48db21ff16 100644
--- a/tools/perf/Documentation/perf.data-file-format.txt
+++ b/tools/perf/Documentation/perf.data-file-format.txt
@@ -272,6 +272,22 @@ struct {
 
 Two uint64_t for the time of first sample and the time of last sample.
 
+        HEADER_BPF_PROG_INFO = 25,
+
+struct bpf_prog_info_linear, which contains detailed information about
+a BPF program, including type, id, tag, jited/xlated instructions, etc.
+
+        HEADER_BPF_BTF = 26,
+
+Contains BPF Type Format (BTF). For more information about BTF, please
+refer to Documentation/bpf/btf.rst.
+
+struct {
+	u32	id;
+	u32	data_size;
+	char	data[];
+};
+
         HEADER_COMPRESSED = 27,
 
 struct {
-- 
2.17.1