linux-kernel - Re: [PATCH 2/2] riscv: Add vector ISA support

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Date:   Mon, 6 Jan 2020 08:30:29 +0530
From:   Anup Patel <anup@...infault.org>
To:     Alan Kao <alankao@...estech.com>
Cc:     guoren@...nel.org, linux-arch@...r.kernel.org,
        Albert Ou <aou@...s.berkeley.edu>, Guo Ren <ren_guo@...ky.com>,
        Arnd Bergmann <arnd@...db.de>,
        Atish Patra <atish.patra@....com>,
        Anup Patel <Anup.Patel@....com>,
        "linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>,
        linux-csky@...r.kernel.org, Vincent Chen <vincent.chen@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Zong Li <zong.li@...ive.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Greentime Hu <greentime.hu@...ive.com>,
        linux-riscv <linux-riscv@...ts.infradead.org>,
        Bin Meng <bmeng.cn@...il.com>
Subject: Re: [PATCH 2/2] riscv: Add vector ISA support

On Mon, Jan 6, 2020 at 8:15 AM Alan Kao <alankao@...estech.com> wrote:
>
> Hi Guo,
>
> On Sun, Jan 05, 2020 at 10:52:15AM +0800, guoren@...nel.org wrote:
> > From: Guo Ren <ren_guo@...ky.com>
> >
> > The implementation follow the RISC-V "V" Vector Extension draft v0.8 with
> > 128bit-vlen and it's based on linux-5.5-rc4.
> >
>
> According to https://lkml.org/lkml/2019/11/22/2169, in which Paul has stated
> that "we plan to only accept patches for new modules or extensions that have
> been frozen or ratified by the RISC-V Foundation."
>
> Is v0.8 ratified enough for now?

As-per the patch acceptance policy, we cannot merge it now (just like KVM
patches) but we can always review and get the patches in final shape
by the time spec is frozen or ratified.

I think we should continue with the patch review and get this series in
good shape.

In fact, having this patches early on LKML is very helpful for people working
on RISC-V vector extension implementation in HW. On this line, this a good
contribution coming at the right time.

Regards,
Anup