[PATCH v4 13/25] KVM: arm64: Instantiate pKVM hypervisor VM and vCPU structures from EL1

[Quentin Perret]

On Monday 17 Oct 2022 at 12:51:57 (+0100), Will Deacon wrote:
> +struct kvm_protected_vm {
> +	pkvm_handle_t handle;
> +	struct mutex vm_lock;
> +
> +	struct {
> +		void *pgd;
> +		void *vm;
> +		void *vcpus[KVM_MAX_VCPUS];

That's memory that's 'wasted' for everyone :/

> +	} hyp_donations;
> +};
> +
>  struct kvm_arch {
>  	struct kvm_s2_mmu mmu;
>  
> @@ -170,10 +181,10 @@ struct kvm_arch {
>  	struct kvm_smccc_features smccc_feat;
>  
>  	/*
> -	 * For an untrusted host VM, 'pkvm_handle' is used to lookup
> +	 * For an untrusted host VM, 'pkvm.handle' is used to lookup
>  	 * the associated pKVM instance in the hypervisor.
>  	 */
> -	pkvm_handle_t pkvm_handle;
> +	struct kvm_protected_vm pkvm;

Maybe make this a pointer that will be !NULL only when pKVM is enabled?

>  };