linux-kernel - Re: [PATCH v3 04/32] KVM: arm64: Initialize kvm_nvhe_init

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Date:   Thu, 4 Mar 2021 13:39:01 +0000
From:   Will Deacon <will@...nel.org>
To:     Quentin Perret <qperret@...gle.com>
Cc:     catalin.marinas@....com, maz@...nel.org, james.morse@....com,
        julien.thierry.kdev@...il.com, suzuki.poulose@....com,
        android-kvm@...gle.com, linux-kernel@...r.kernel.org,
        kernel-team@...roid.com, kvmarm@...ts.cs.columbia.edu,
        linux-arm-kernel@...ts.infradead.org, tabba@...gle.com,
        mark.rutland@....com, dbrazdil@...gle.com, mate.toth-pal@....com,
        seanjc@...gle.com, robh+dt@...nel.org
Subject: Re: [PATCH v3 04/32] KVM: arm64: Initialize kvm_nvhe_init_params
 early

On Tue, Mar 02, 2021 at 02:59:34PM +0000, Quentin Perret wrote:
> Move the initialization of kvm_nvhe_init_params in a dedicated function
> that is run early, and only once during KVM init, rather than every time
> the KVM vectors are set and reset.
> 
> This also opens the opportunity for the hypervisor to change the init
> structs during boot, hence simplifying the replacement of host-provided
> page-table by the one the hypervisor will create for itself.
> 
> Signed-off-by: Quentin Perret <qperret@...gle.com>
> ---
>  arch/arm64/kvm/arm.c | 30 ++++++++++++++++++------------
>  1 file changed, 18 insertions(+), 12 deletions(-)

Acked-by: Will Deacon <will@...nel.org>

Will