netdev - Re: [PATCH RESEND bpf-next v3 0/6] Zbb support and code simplification for RV64 JIT

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Date: Tue, 23 Jan 2024 09:57:05 +0800
From: Pu Lehui <pulehui@...weicloud.com>
To: Björn Töpel <bjorn@...nel.org>, bpf@...r.kernel.org,
 linux-riscv@...ts.infradead.org, netdev@...r.kernel.org
Cc: Alexei Starovoitov <ast@...nel.org>,
 Daniel Borkmann <daniel@...earbox.net>, Andrii Nakryiko <andrii@...nel.org>,
 Martin KaFai Lau <martin.lau@...ux.dev>, Song Liu <song@...nel.org>,
 Yonghong Song <yhs@...com>, 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>,
 Palmer Dabbelt <palmer@...belt.com>, Conor Dooley <conor@...nel.org>,
 Luke Nelson <luke.r.nels@...il.com>, Pu Lehui <pulehui@...wei.com>
Subject: Re: [PATCH RESEND bpf-next v3 0/6] Zbb support and code
 simplification for RV64 JIT



On 2024/1/23 0:30, Björn Töpel wrote:
> Pu Lehui <pulehui@...weicloud.com> writes:
> 
>> On 2024/1/22 23:07, Björn Töpel wrote:
>>> Björn Töpel <bjorn@...nel.org> writes:
>>>
>>>> Pu Lehui <pulehui@...weicloud.com> writes:
>>>>
>>>>> On 2024/1/22 22:33, Björn Töpel wrote:
>>>>>> Pu Lehui <pulehui@...weicloud.com> writes:
>>>>>>
>>>>>>> Add Zbb support [0] to optimize code size and performance of RV64 JIT.
>>>>>>> Meanwhile, adjust the code for unification and simplification. Tests
>>>>>>> test_bpf.ko and test_verifier have passed, as well as the relative
>>>>>>> testcases of test_progs*.
>>>>>>>
>>>>>>> Link: https://github.com/riscv/riscv-bitmanip/releases/download/1.0.0/bitmanip-1.0.0-38-g865e7a7.pdf [0]
>>>>>>>
>>>>>>> v3 resend:
>>>>>>> - resend for mail be treated as spam.
>>>>>>>
>>>>>>> v3:
>>>>>>> - Change to early-exit code style and make code more explicit.
>>>>>>
>>>>>> Lehui,
>>>>>>
>>>>>> Sorry for the delay. I'm chasing a struct_ops RISC-V BPF regression in
>>>>>> 6.8-rc1, I will need to wrap my head around that prior reviewing
>>>>>> properly.
>>>>>>
>>>>>
>>>>> Oh, I also found the problem with struct ops and fixed it
>>>
>>> Pu, with your patch bpf_iter_setsockopt, bpf_tcp_ca, and dummy_st_ops
>>> passes!
>>>
>>> Please spin a proper fixes patch, and feel free to add:
>>>
>>> Tested-by: Björn Töpel <bjorn@...osinc.com>
>>> Acked-by: Björn Töpel <bjorn@...nel.org>
>>>
>>
>> Is that in a hurry? If not, I would like to send it with the upcoming
>> patchset.
> 
> This is a separate fix, right? What patchset are you referring to where
> the fix would be in?
> 

Yes, you are right! I'll send a bug fix patch as soon as possible. 
Coming soon is the bpf_prog_pack for RV64 Trampoline, which currently 
does not seem to be related to the bugfix, will populate the commit 
message and send it later.😁

> As of now 6.8-rc1 is broken! It would be a great with a fix asap...
> 
> 
> Cheers,
> Björn