linux-kernel - Re: [PATCH v3 1/4] arm64/feature: add MTE_STORE

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Message-ID: <aBT_4xNOL436-jJR@arm.com>
Date: Fri, 2 May 2025 18:24:51 +0100
From: Catalin Marinas <catalin.marinas@....com>
To: Yeoreum Yun <yeoreum.yun@....com>
Cc: will@...nel.org, broonie@...nel.org, anshuman.khandual@....com,
	joey.gouly@....com, maz@...nel.org, oliver.upton@...ux.dev,
	frederic@...nel.org, james.morse@....com,
	hardevsinh.palaniya@...iconsignals.io,
	shameerali.kolothum.thodi@...wei.com, huangxiaojia2@...wei.com,
	mark.rutland@....com, samuel.holland@...ive.com,
	palmer@...osinc.com, charlie@...osinc.com,
	thiago.bauermann@...aro.org, bgray@...ux.ibm.com,
	tglx@...utronix.de, puranjay@...nel.org, david@...hat.com,
	yang@...amperecomputing.com, mbenes@...e.cz,
	joel.granados@...nel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, nd@....com,
	Peter Collingbourne <pcc@...gle.com>
Subject: Re: [PATCH v3 1/4] arm64/feature: add MTE_STORE_ONLY feature

(adding Peter C again, please keep him on cc for future versions; and
you can probably avoid others that don't have an interest in MTE ;))

On Thu, Apr 10, 2025 at 09:07:20AM +0100, Yeoreum Yun wrote:
> add MTE_STORE_ONLY feature and HWCAP.
> 
> Signed-off-by: Yeoreum Yun <yeoreum.yun@....com>

Please briefly describe what the feature is in the commit log.

> diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c
> index e2b13454e38a..40f85ec01fe4 100644
> --- a/arch/arm64/kernel/cpuinfo.c
> +++ b/arch/arm64/kernel/cpuinfo.c
> @@ -161,6 +161,7 @@ static const char *const hwcap_str[] = {
>  	[KERNEL_HWCAP_SME_STMOP]	= "smestmop",
>  	[KERNEL_HWCAP_SME_SMOP4]	= "smesmop4",
>  	[KERNEL_HWCAP_MTE_FAR]		= "mte_far",
> +	[KERNEL_HWCAP_MTE_STORE_ONLY]	= "mte_store_only",

Nit: "mtestoreonly"

-- 
Catalin