On 8/19/20 3:40 PM, Hao Luo wrote:
Sync tools/include/linux/uapi/bpf.h with include/linux/uapi/bpf.h
This can be folded into the previous patch.
Signed-off-by: Hao Luo <haoluo@xxxxxxxxxx> --- tools/include/uapi/linux/bpf.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h index 468376f2910b..7e3dfb2bbb86 100644 --- a/tools/include/uapi/linux/bpf.h +++ b/tools/include/uapi/linux/bpf.h @@ -3415,6 +3415,20 @@ union bpf_attr { * A non-negative value equal to or less than *size* on success, * or a negative error in case of failure. * + * void *bpf_per_cpu_ptr(const void *ptr, u32 cpu) + * Description + * Take the address of a percpu ksym and return a pointer pointing + * to the variable on *cpu*. A ksym is an extern variable decorated + * with '__ksym'. A ksym is percpu if there is a global percpu var + * (either static or global) defined of the same name in the kernel. + * + * bpf_per_cpu_ptr() has the same semantic as per_cpu_ptr() in the + * kernel, except that bpf_per_cpu_ptr() may return NULL. This + * happens if *cpu* is larger than nr_cpu_ids. The caller of + * bpf_per_cpu_ptr() must check the returned value. + * Return + * A generic pointer pointing to the variable on *cpu*. + * */ #define __BPF_FUNC_MAPPER(FN) \ FN(unspec), \ @@ -3559,6 +3573,7 @@ union bpf_attr { FN(skc_to_tcp_request_sock), \ FN(skc_to_udp6_sock), \ FN(get_task_stack), \ + FN(bpf_per_cpu_ptr), \ /* *//* integer value in 'imm' field of BPF_CALL instruction selects which helper
