Signed-off-by: Daniel Xu <dxu@xxxxxxxxx>
---
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
