kvm_unregister_device_ops
kvm_unregister_device_ops(KVM_DEV_TYPE_ARM_VGIC_V2);
kvm_unregister_device_ops(KVM_DEV_TYPE_RISCV_AIA);
void kvm_unregister_device_ops(u32 type);
kvm_unregister_device_ops(KVM_DEV_TYPE_VFIO);