linux-kernel - Re: [PATCH v2 3/3] KVM: arm64: Drop the CPU_FTR_REG_HYP

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Date:   Tue, 23 Mar 2021 09:47:50 +0000
From:   Quentin Perret <qperret@...gle.com>
To:     Marc Zyngier <maz@...nel.org>
Cc:     catalin.marinas@....com, james.morse@....com,
        julien.thierry.kdev@...il.com, suzuki.poulose@....com,
        android-kvm@...gle.com, seanjc@...gle.com, mate.toth-pal@....com,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        kernel-team@...roid.com, kvmarm@...ts.cs.columbia.edu,
        tabba@...gle.com, ardb@...nel.org, mark.rutland@....com,
        dbrazdil@...gle.com
Subject: Re: [PATCH v2 3/3] KVM: arm64: Drop the CPU_FTR_REG_HYP_COPY
 infrastructure

On Monday 22 Mar 2021 at 17:56:39 (+0000), Marc Zyngier wrote:
> Now that the read_ctr macro has been specialised for nVHE,
> the whole CPU_FTR_REG_HYP_COPY infrastrcture looks completely
> overengineered.
> 
> Simplify it by populating the two u64 quantities (MMFR0 and 1)
> that the hypervisor need.
> 
> Signed-off-by: Marc Zyngier <maz@...nel.org>

Reviewed-by: Quentin Perret <qperret@...gle.com>

Thanks,
Quentin