VMCS_CR4_SHADOW
error = vm_get_vmcs_field(vcpu, VMCS_CR4_SHADOW,
vmcs_write(VMCS_CR4_SHADOW, regval);
vmcs_read(VMCS_CR4_SHADOW));
vmcs_write(VMCS_CR4_SHADOW, val);
vmcs_write(VMCS_CR4_SHADOW, 0);