linux-kernel - Re: [PATCH v9 2/5] KVM: arm64: expose FEAT

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Message-ID: <aNEkNF8rvb_e9DKd@finisterre.sirena.org.uk>
Date: Mon, 22 Sep 2025 12:25:56 +0200
From: Mark Brown <broonie@...nel.org>
To: Yeoreum Yun <yeoreum.yun@....com>
Cc: catalin.marinas@....com, will@...nel.org, maz@...nel.org,
	oliver.upton@...ux.dev, joey.gouly@....com, james.morse@....com,
	ardb@...nel.org, scott@...amperecomputing.com,
	suzuki.poulose@....com, yuzenghui@...wei.com, mark.rutland@....com,
	linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v9 2/5] KVM: arm64: expose FEAT_LSUI to guest

On Mon, Sep 22, 2025 at 11:22:41AM +0100, Yeoreum Yun wrote:

>  	case SYS_ID_AA64ISAR3_EL1:
> -		val &= ID_AA64ISAR3_EL1_FPRCVT | ID_AA64ISAR3_EL1_FAMINMAX;
> +		val &= ID_AA64ISAR3_EL1_FPRCVT | ID_AA64ISAR3_EL1_FAMINMAX |
> +		       ID_AA64ISAR3_EL1_LSUI;

This should be added to set_id_regs, but ID_AA64ISAR3_EL1 isn't covered
by that yet.  I posted a series for that the other day:

   https://lore.kernel.org/r/20250920-kvm-arm64-id-aa64isar3-el1-v1-0-1764c1c1c96d@kernel.org

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