linux-kernel - Re: [PATCH v7 2/9] arm64: report address tag when FEAT_MTE_TAGGED

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Message-ID: <9a78c058-2aeb-43d8-94f8-987507a1a9a3@sirena.org.uk>
Date: Wed, 11 Jun 2025 16:14:23 +0100
From: Mark Brown <broonie@...nel.org>
To: Yeoreum Yun <yeoreum.yun@....com>
Cc: catalin.marinas@....com, pcc@...gle.com, will@...nel.org,
	anshuman.khandual@....com, joey.gouly@....com,
	yury.khrustalev@....com, maz@...nel.org, oliver.upton@...ux.dev,
	frederic@...nel.org, akpm@...ux-foundation.org, surenb@...gle.com,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-doc@...r.kernel.org
Subject: Re: [PATCH v7 2/9] arm64: report address tag when
 FEAT_MTE_TAGGED_FAR is supported

On Wed, Jun 11, 2025 at 02:58:11PM +0100, Yeoreum Yun wrote:

>  	 * The architecture specifies that bits 63:60 of FAR_EL1 are UNKNOWN
>  	 * for tag check faults. Set them to corresponding bits in the untagged
> -	 * address.
> +	 * address if ARM64_MTE_FAR isn't supported.
> +	 * Otherwise, bits 63:60 of FAR_EL1 are KNOWN.
>  	 */

Should that be "are UNKNOWN"?

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