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

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Message-ID: <Ynk0rgKMdJuR/aB1@sirena.org.uk>
Date:   Mon, 9 May 2022 16:35:10 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Geert Uytterhoeven <geert+renesas@...der.be>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: ARM Scalable Matrix Extension is ARMv9-A

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.

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

Fixes?

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