linux-kernel - Re: [PATCH bpf-next v2 2/2] bpf,riscv: Implement bpf_addr_space

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Message-ID: <c812aed1-8659-4cdf-bcee-89d100ded9d4@huaweicloud.com>
Date: Tue, 26 Mar 2024 09:43:57 +0800
From: Pu Lehui <pulehui@...weicloud.com>
To: Björn Töpel <bjorn@...nel.org>,
 Puranjay Mohan <puranjay12@...il.com>, Conor Dooley <conor@...nel.org>
Cc: Alexei Starovoitov <ast@...nel.org>,
 Daniel Borkmann <daniel@...earbox.net>, Andrii Nakryiko <andrii@...nel.org>,
 Martin KaFai Lau <martin.lau@...ux.dev>, Eduard Zingerman
 <eddyz87@...il.com>, Song Liu <song@...nel.org>,
 Yonghong Song <yonghong.song@...ux.dev>,
 John Fastabend <john.fastabend@...il.com>, KP Singh <kpsingh@...nel.org>,
 Stanislav Fomichev <sdf@...gle.com>, Hao Luo <haoluo@...gle.com>,
 Jiri Olsa <jolsa@...nel.org>, Luke Nelson <luke.r.nels@...il.com>,
 Xi Wang <xi.wang@...il.com>, Paul Walmsley <paul.walmsley@...ive.com>,
 Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>,
 bpf@...r.kernel.org, linux-riscv@...ts.infradead.org,
 linux-kernel@...r.kernel.org, Manu Bretelle <chantra@...a.com>,
 Mykola Lysenko <mykolal@...a.com>, Nikolay Yurin <yurinnick@...a.com>
Subject: Re: [PATCH bpf-next v2 2/2] bpf,riscv: Implement bpf_addr_space_cast
 instruction



On 2024/3/26 4:31, Björn Töpel wrote:
> Puranjay Mohan <puranjay12@...il.com> 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

yeah, the current issue below is fixed and I think we can move forward.

https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=443574b033876c85a35de4c65c14f7fe092222b2

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