sync: auto-generate latest BPF helpers

Latest changes to BPF helper definitions.
This commit is contained in:
Andrii Nakryiko
2021-09-15 13:19:37 -07:00
committed by Andrii Nakryiko
parent 627cbb395b
commit 42da89eb16

View File

@@ -4043,4 +4043,29 @@ static __u64 (*bpf_get_attach_cookie)(void *ctx) = (void *) 174;
*/
static long (*bpf_task_pt_regs)(struct task_struct *task) = (void *) 175;
/*
* bpf_get_branch_snapshot
*
* Get branch trace from hardware engines like Intel LBR. The
* hardware engine is stopped shortly after the helper is
* called. Therefore, the user need to filter branch entries
* based on the actual use case. To capture branch trace
* before the trigger point of the BPF program, the helper
* should be called at the beginning of the BPF program.
*
* The data is stored as struct perf_branch_entry into output
* buffer *entries*. *size* is the size of *entries* in bytes.
* *flags* is reserved for now and must be zero.
*
*
* Returns
* On success, number of bytes written to *buf*. On error, a
* negative value.
*
* **-EINVAL** if *flags* is not zero.
*
* **-ENOENT** if architecture does not support branch records.
*/
static long (*bpf_get_branch_snapshot)(void *entries, __u32 size, __u64 flags) = (void *) 176;