[PATCH bpf-next v5 1/3] btf: allow mmap of vmlinux btf

[Alexei Starovoitov]

On Thu, Jul 17, 2025 at 8:15 AM Lorenz Bauer <lmb at isovalent.com> wrote:
>
> On Thu, Jul 17, 2025 at 3:49 PM Alexei Starovoitov
> <alexei.starovoitov at gmail.com> wrote:
>
> > __pa_symbol() should work for start_BTF, but would be good
> > to double check with Ard that the rest stays linear.
>
> Alexei,
>
> This code in the arm64 setup does make me think we'll be OK.
>
> kernel_code.start   = __pa_symbol(_stext);
> kernel_code.end     = __pa_symbol(__init_begin - 1);
> kernel_data.start   = __pa_symbol(_sdata);
> kernel_data.end     = __pa_symbol(_end - 1);
>
> Using these as start and end only makes sense to me if the addresses
> are linear? See
> https://elixir.bootlin.com/linux/v6.15.6/source/arch/arm64/kernel/setup.c#L217

Thanks for checking. lgtm.