linux-kernel - Re: [PATCH v3 4/4] tools/kselftest: add MTE_STORE

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Message-ID: <aBUGI1OaaSUJPGAa@arm.com>
Date: Fri, 2 May 2025 18:51:31 +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
Subject: Re: [PATCH v3 4/4] tools/kselftest: add MTE_STORE_ONLY feature hwcap
 test

On Thu, Apr 10, 2025 at 09:07:23AM +0100, Yeoreum Yun wrote:
> add MTE_STORE_ONLY feature hwcap test.
> 
> Signed-off-by: Yeoreum Yun <yeoreum.yun@....com>
> Reviewed-by: Mark Brown <broonie@...nel.org>
> ---
>  tools/testing/selftests/arm64/abi/hwcap.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/tools/testing/selftests/arm64/abi/hwcap.c b/tools/testing/selftests/arm64/abi/hwcap.c
> index a539eeb0bfc0..32385f67498e 100644
> --- a/tools/testing/selftests/arm64/abi/hwcap.c
> +++ b/tools/testing/selftests/arm64/abi/hwcap.c
> @@ -1104,6 +1104,12 @@ static const struct hwcap_data {
>  		.hwcap_bit = HWCAP3_MTE_FAR,
>  		.cpuinfo = "mte_far",
>  	},
> +	{
> +		.name = "MTE_STOREONLY",
> +		.at_hwcap = AT_HWCAP3,
> +		.hwcap_bit = HWCAP3_MTE_STORE_ONLY,
> +		.cpuinfo = "mte_store_only",
> +	},
>  };

Please also add checks to tools/testing/selftests/arm64/mte/ to verify
that read tag check faults are ignored when this is enabled.

-- 
Catalin