linux-kernel - Re: [PATCH 1/3] arm64: add FEAT_MTE_TAGGED

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Message-ID: <e397283e-4c53-495f-a699-16c2f556837f@sirena.org.uk>
Date: Thu, 3 Apr 2025 16:13:27 +0100
From: Mark Brown <broonie@...nel.org>
To: Yeoreum Yun <yeoreum.yun@....com>
Cc: catalin.marinas@....com, will@...nel.org, anshuman.khandual@....com,
	joey.gouly@....com, yury.khrustalev@....com, maz@...nel.org,
	oliver.upton@...ux.dev, frederic@...nel.org,
	shameerali.kolothum.thodi@...wei.com, james.morse@....com,
	mark.rutland@....com, huangxiaojia2@...wei.com,
	akpm@...ux-foundation.org, surenb@...gle.com, robin.murphy@....com,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-doc@...r.kernel.org
Subject: Re: [PATCH 1/3] arm64: add FEAT_MTE_TAGGED_FAR feature

On Thu, Apr 03, 2025 at 03:15:33PM +0100, Yeoreum Yun wrote:
> Add FEAT_MTE_TAGGED_FAR cpucap which makes FAR_ELx report
> all non-address bits on a synchronous MTE tag check fault since Armv8.9
> 
> Signed-off-by: Yeoreum Yun <yeoreum.yun@....com>
> ---
>  arch/arm64/include/asm/hwcap.h      | 1 +
>  arch/arm64/include/uapi/asm/hwcap.h | 1 +
>  arch/arm64/kernel/cpufeature.c      | 9 +++++++++
>  arch/arm64/kernel/cpuinfo.c         | 1 +
>  arch/arm64/tools/cpucaps            | 1 +
>  5 files changed, 13 insertions(+)

Please also add this to the hwcaps kselftest.

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