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    Subject[PATCH bpf-next v1 7/8] bpf: Propagate bpf_per_cpu_ptr() to /tools
    From
    Sync tools/include/linux/uapi/bpf.h with include/linux/uapi/bpf.h

    Signed-off-by: Hao Luo <haoluo@google.com>
    ---
    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
    --
    2.28.0.220.ged08abb693-goog
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