Subject: Re: [PATCH v5 07/69] KVM: arm64: nv: Introduce nested virtualization VCPU feature

From: "Russell King (Oracle)" <[email-masked]>
Date: Mon, 17 Jan 2022 16:57:19 +0000

On Mon, Nov 29, 2021 at 08:00:48PM +0000, Marc Zyngier wrote:
> From: Christoffer Dall <[email-masked]>
> 
> Introduce the feature bit and a primitive that checks if the feature is
> set behind a static key check based on the cpus_have_const_cap check.
> 
> Checking nested_virt_in_use() on systems without nested virt enabled
> should have neglgible overhead.
> 
> We don't yet allow userspace to actually set this feature.
> 
> Signed-off-by: Christoffer Dall <[email-masked]>
> Signed-off-by: Marc Zyngier <[email-masked]>

Reviewed-by: Russell King (Oracle) <[email-masked]>

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