From: Daniel Xu <dxu@dxuuu.xyz>
To: bpf@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net,
songliubraving@fb.com, yhs@fb.com, andriin@fb.com
Cc: Daniel Xu <dxu@dxuuu.xyz>,
linux-kernel@vger.kernel.org, kernel-team@fb.com,
peterz@infradead.org, mingo@redhat.com, acme@kernel.org
Subject: [PATCH v3 bpf-next 2/3] tools/bpf: Sync uapi header bpf.h
Date: Thu, 23 Jan 2020 13:23:11 -0800 [thread overview]
Message-ID: <20200123212312.3963-3-dxu@dxuuu.xyz> (raw)
In-Reply-To: <20200123212312.3963-1-dxu@dxuuu.xyz>
Signed-off-by: Daniel Xu <dxu@dxuuu.xyz>
---
tools/include/uapi/linux/bpf.h | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index f1d74a2bd234..50c580c8a201 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -2892,6 +2892,18 @@ union bpf_attr {
* Obtain the 64bit jiffies
* Return
* The 64 bit jiffies
+ *
+ * int bpf_perf_prog_read_branches(struct bpf_perf_event_data *ctx, void *buf, u32 buf_size)
+ * Description
+ * For en eBPF program attached to a perf event, retrieve the
+ * branch records (struct perf_branch_entry) associated to *ctx*
+ * and store it in the buffer pointed by *buf* up to size
+ * *buf_size* bytes.
+ *
+ * Any unused parts of *buf* will be filled with zeros.
+ * Return
+ * On success, number of bytes written to *buf*. On error, a
+ * negative value.
*/
#define __BPF_FUNC_MAPPER(FN) \
FN(unspec), \
@@ -3012,7 +3024,8 @@ union bpf_attr {
FN(probe_read_kernel_str), \
FN(tcp_send_ack), \
FN(send_signal_thread), \
- FN(jiffies64),
+ FN(jiffies64), \
+ FN(perf_prog_read_branches),
/* integer value in 'imm' field of BPF_CALL instruction selects which helper
* function eBPF program intends to call
--
2.21.1
next prev parent reply other threads:[~2020-01-23 21:23 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-23 21:23 [PATCH v3 bpf-next 0/3] Add bpf_perf_prog_read_branches() helper Daniel Xu
2020-01-23 21:23 ` [PATCH v3 bpf-next 1/3] bpf: " Daniel Xu
2020-01-23 23:48 ` Yonghong Song
2020-01-24 0:49 ` John Fastabend
2020-01-24 2:02 ` Daniel Xu
2020-01-24 8:25 ` Martin Lau
2020-01-24 20:28 ` Daniel Xu
2020-01-23 21:23 ` Daniel Xu [this message]
2020-01-23 21:23 ` [PATCH v3 bpf-next 3/3] selftests/bpf: add bpf_perf_prog_read_branches() selftest Daniel Xu
2020-01-23 23:20 ` Martin Lau
2020-01-24 2:55 ` Daniel Xu
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