static int handle_vmclear(struct kvm_vcpu *vcpu)
{
	struct vcpu_vmx *vmx = to_vmx(vcpu);
	u32 zero = 0;
	gpa_t vmptr;

	if (!nested_vmx_check_permission(vcpu))
		return 1;

	if (nested_vmx_get_vmptr(vcpu, &vmptr))
		return 1;

	if (!PAGE_ALIGNED(vmptr) || (vmptr >> cpuid_maxphyaddr(vcpu))) {
		nested_vmx_failValid(vcpu, VMXERR_VMCLEAR_INVALID_ADDRESS);
		return kvm_skip_emulated_instruction(vcpu);
	}

	if (vmptr == vmx->nested.vmxon_ptr) {
		nested_vmx_failValid(vcpu, VMXERR_VMCLEAR_VMXON_POINTER);
		return kvm_skip_emulated_instruction(vcpu);
	}

	if (vmptr == vmx->nested.current_vmptr)
		nested_release_vmcs12(vmx);

	kvm_vcpu_write_guest(vcpu,
			vmptr + offsetof(struct vmcs12, launch_state),
			&zero, sizeof(zero));

	nested_free_vmcs02(vmx, vmptr);

	nested_vmx_succeed(vcpu);
	return kvm_skip_emulated_instruction(vcpu);
}

Unknown