linux-kernel - Re: [PATCH RFC 0/3] riscv: Add DMA

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Message-ID: <CAJF2gTSg0TqAzmdzf7B_xASXLO-z4yVvCDnaUV4brP7tCpCdvQ@mail.gmail.com>
Date:   Wed, 19 May 2021 14:09:17 +0800
From:   Guo Ren <guoren@...nel.org>
To:     Christoph Hellwig <hch@....de>
Cc:     Anup Patel <anup.patel@....com>,
        Palmer Dabbelt <palmerdabbelt@...gle.com>,
        drew@...gleboard.org, wefu@...hat.com, lazyparser@...il.com,
        linux-riscv <linux-riscv@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arch <linux-arch@...r.kernel.org>,
        linux-sunxi@...ts.linux.dev, Guo Ren <guoren@...ux.alibaba.com>
Subject: Re: [PATCH RFC 0/3] riscv: Add DMA_COHERENT support

On Wed, May 19, 2021 at 1:55 PM Christoph Hellwig <hch@....de> wrote:
>
> On Wed, May 19, 2021 at 01:48:23PM +0800, Guo Ren wrote:
> > The patchset just leaves a configuration chance for vendors. Before
> > RISC-V ISA fixes it, we should give the chance to let vendor solve
> > their real chip issues.
>
> No.  The vendors need to work to get a feature standardized before
> implementing it.  There is other way to have a sane kernel build that
> supports all the different SOCs.

I've said the patchset doesn't define any features, It just leaves the
chance for vendors.

It's not in conflict with any standardized riscv ISA.


-- 
Best Regards
 Guo Ren

ML: https://lore.kernel.org/linux-csky/