linux-kernel - Re: [PATCH] arm64: ARM Scalable Matrix Extension is ARMv9-A

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Message-ID: <CAMuHMdV8GdZnNSVrQiS-ZombAwJJK28Zz3Pzi04CXBOCmSmpkA@mail.gmail.com>
Date:   Tue, 10 May 2022 10:08:57 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Mark Brown <broonie@...nel.org>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arm64: ARM Scalable Matrix Extension is ARMv9-A

Hi Mark,

On Mon, May 9, 2022 at 5:35 PM Mark Brown <broonie@...nel.org> wrote:
> On Mon, May 09, 2022 at 03:40:30PM +0200, Geert Uytterhoeven wrote:
> > The help text for the config option to enable support for the ARM
> > Scalable Matrix Extension does not mention the specification baseline
> > for this extension.  Make it clear this is an extension for the ARMv9-A
> > architecture, so users know when it is safe to disable this option,
> > which is enabled by default.
>
> If this is important we should probably also do it for SVE, it was
> introduced along with v8.2 but that's not called out in Kconfig.

Makes sense.

I jumped on this one in particular, as I believe it's the first v9 extension.

> > Fixes: a1f4ccd25cc25625 ("arm64/sme: Provide Kconfig for SME")
>
> Fixes?

That we can discuss about ;-)

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds