Re: [PATCH v5 27/34] KVM: SVM: Add support for booting APs for an SEV-ES guest

[Paolo Bonzini]

On 10/12/20 18:10, Tom Lendacky wrote:
> @@ -10144,6 +10144,15 @@ void kvm_vcpu_deliver_sipi_vector(struct kvm_vcpu *vcpu, u8 vector)
>   {
>   	struct kvm_segment cs;
>   
> +	/*
> +	 * Guests with protected state can't have their state altered by KVM,
> +	 * call the vcpu_deliver_sipi_vector() x86 op for processing.
> +	 */
> +	if (vcpu->arch.guest_state_protected) {
> +		kvm_x86_ops.vcpu_deliver_sipi_vector(vcpu, vector);
> +		return;
> +	}
> +

Also, I don't mind that you just call 
kvm_x86_ops.vcpu_deliver_sipi_vector from lapic.c, and make VMX just do

	.vcpu_deliver_sipi_vector = kvm_vcpu_deliver_sipi_vector,

(SVM would do it if !guest_state_protected).  This matches more or less 
how I redid the MSR part.

Paolo