Re: [RFC PATCH v2 09/10] KVM: arm64: arm64 has private memory support when config is enabled

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Hi Fuad,

On Thu, 2024-08-01 at 10:01 +0100, Fuad Tabba wrote:
> Implement kvm_arch_has_private_mem() in arm64, making it
> dependent on the configuration option.
> 
> Signed-off-by: Fuad Tabba <tabba@xxxxxxxxxx>
> ---
>  arch/arm64/include/asm/kvm_host.h | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
> index 36b8e97bf49e..8f7d78ee9557 100644
> --- a/arch/arm64/include/asm/kvm_host.h
> +++ b/arch/arm64/include/asm/kvm_host.h
> @@ -1414,4 +1414,7 @@ bool kvm_arm_vcpu_stopped(struct kvm_vcpu *vcpu);
>                 (pa + pi + pa3) == 1;                                   \
>         })
> 
> +#define kvm_arch_has_private_mem(kvm)                                  \
> +       (IS_ENABLED(CONFIG_KVM_PRIVATE_MEM) && is_protected_kvm_enabled())
> +

Would it make sense to have some ARM equivalent of
KVM_X86_SW_PROTECTED_VM here? Both for easier testing of guest_memfd on
ARM, as well as for future non-coco usecases.

>  #endif /* __ARM64_KVM_HOST_H__ */
> --
> 2.46.0.rc1.232.g9752f9e123-goog
> 

Best,
Patrick




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