KVM_IOCSR_BUS
ret = kvm_io_bus_write(vcpu, KVM_IOCSR_BUS, addr, run->iocsr_io.len, val);
ret = kvm_io_bus_read(vcpu, KVM_IOCSR_BUS, addr,
ret = kvm_io_bus_register_dev(kvm, KVM_IOCSR_BUS,
ret = kvm_io_bus_register_dev(kvm, KVM_IOCSR_BUS,
kvm_io_bus_unregister_dev(kvm, KVM_IOCSR_BUS, &s->device);
kvm_io_bus_unregister_dev(kvm, KVM_IOCSR_BUS, &eiointc->device);
kvm_io_bus_unregister_dev(kvm, KVM_IOCSR_BUS, &eiointc->device_vext);
ret = kvm_io_bus_read(vcpu, KVM_IOCSR_BUS, addr, 4, &val);
ret = kvm_io_bus_write(vcpu, KVM_IOCSR_BUS, addr, 4, &val);
ret = kvm_io_bus_register_dev(kvm, KVM_IOCSR_BUS, IOCSR_IPI_BASE, IOCSR_IPI_SIZE, device);
kvm_io_bus_unregister_dev(kvm, KVM_IOCSR_BUS, &ipi->device);