linux-kernel - Re: [PATCH 09/10] arm64: mops: detect and enable FEAT

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Message-ID: <Y+5YY7RtNYZKTiNn@sirena.org.uk>
Date:   Thu, 16 Feb 2023 16:22:59 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Kristina Martsenko <kristina.martsenko@....com>
Cc:     linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.linux.dev,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Marc Zyngier <maz@...nel.org>,
        Oliver Upton <oliver.upton@...ux.dev>,
        James Morse <james.morse@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Zenghui Yu <yuzenghui@...wei.com>,
        Mark Rutland <mark.rutland@....com>,
        Luis Machado <luis.machado@....com>,
        Vladimir Murzin <vladimir.murzin@....com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 09/10] arm64: mops: detect and enable FEAT_MOPS

On Thu, Feb 16, 2023 at 04:00:11PM +0000, Kristina Martsenko wrote:

> The Arm v8.8/9.3 FEAT_MOPS feature provides new instructions that
> perform a memory copy or set. Wire up the cpufeature code to detect the
> presence of FEAT_MOPS and enable it.
> 
> Signed-off-by: Kristina Martsenko <kristina.martsenko@....com>
> ---
>  Documentation/arm64/cpu-feature-registers.rst |  2 ++
>  Documentation/arm64/elf_hwcaps.rst            |  3 +++
>  arch/arm64/include/asm/hwcap.h                |  1 +
>  arch/arm64/include/uapi/asm/hwcap.h           |  1 +
>  arch/arm64/kernel/cpufeature.c                | 19 +++++++++++++++++++
>  arch/arm64/kernel/cpuinfo.c                   |  1 +
>  arch/arm64/tools/cpucaps                      |  1 +
>  7 files changed, 28 insertions(+)

Please also add this to the hwcaps selftest.

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