Re: [PATCH bpf-next v2 2/2] bpf,riscv: Implement bpf_addr_space_cast instruction

[Björn Töpel]

Puranjay Mohan <puranjay12@xxxxxxxxx> writes:

> Is there a separate CI for RISCV related stuff? is it public?
>
> I would be interested in adding RISC-V support in
> https://github.com/kernel-patches/bpf
> Is someone already working on this?

+Cc Manu/Mykola/Nico who's doing all of the awesome BPF CI work at Meta,
and can keep me honest. ;-)

I did some early hacks for to add RISC-V support for the BPF CI, but
haven't had time to work on it recently. :-(

  [1] https://github.com/libbpf/ci/pull/87
  [2] https://github.com/kernel-patches/vmtest/pull/194

I've been talking recently to Lehui about it as well.

Two major things are missing:

1. Cross-compilation support (expand on [1])
2. Align the rootfs with what the other arch are using, to run the tests
   on Qemu/TCG (and proper HW at some point!). RISC-V does not have
   Debian Stable support, and would probably need Ubuntu or Debian Sid
   snapshop. Manu outlines some issues here:
   https://github.com/libbpf/ci/pull/83

Having to manually run BPF tests ("non-official RISC-V BPF CI") is a
mess!


Björn