Re: [RFC PATCH v1 01/30] KVM: arm64: placeholder to check if VM is protected

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Hey Fuad,

On Friday 24 Sep 2021 at 13:53:30 (+0100), Fuad Tabba wrote:
> Add a function to check whether a VM is protected (under pKVM).
> Since the creation of protected VMs isn't enabled yet, this is a
> placeholder that always returns false. The intention is for this
> to become a check for protected VMs in the future (see Will's RFC).
> 
> No functional change intended.
> 
> Acked-by: Will Deacon <will@xxxxxxxxxx>
> Signed-off-by: Fuad Tabba <tabba@xxxxxxxxxx>
> 
> Link: https://lore.kernel.org/kvmarm/20210603183347.1695-1-will@xxxxxxxxxx/
> ---
>  arch/arm64/include/asm/kvm_host.h | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
> index 7cd7d5c8c4bc..adb21a7f0891 100644
> --- a/arch/arm64/include/asm/kvm_host.h
> +++ b/arch/arm64/include/asm/kvm_host.h
> @@ -763,6 +763,11 @@ void kvm_arch_free_vm(struct kvm *kvm);
>  
>  int kvm_arm_setup_stage2(struct kvm *kvm, unsigned long type);
>  
> +static inline bool kvm_vm_is_protected(struct kvm *kvm)
> +{
> +	return false;
> +}

Nit: this isn't used before patch 25 I think, so maybe move to a later
point in the series? That confused me a tiny bit :)

Thanks,
Quentin



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