| .. _s390x-System-emulator: | 
 |  | 
 | s390x System emulator | 
 | --------------------- | 
 |  | 
 | QEMU can emulate z/Architecture (in particular, 64 bit) s390x systems | 
 | via the ``qemu-system-s390x`` binary. Only one machine type, | 
 | ``s390-ccw-virtio``, is supported (with versioning for compatibility | 
 | handling). | 
 |  | 
 | When using KVM as accelerator, QEMU can emulate CPUs up to the generation | 
 | of the host. When using the default cpu model with TCG as accelerator, | 
 | QEMU will emulate a subset of z13 cpu features that should be enough to run | 
 | distributions built for the z13. | 
 |  | 
 | Device support | 
 | ============== | 
 |  | 
 | QEMU will not emulate most of the traditional devices found under LPAR or | 
 | z/VM; virtio devices (especially using virtio-ccw) make up the bulk of | 
 | the available devices. Passthrough of host devices via vfio-pci, vfio-ccw, | 
 | or vfio-ap is also available. | 
 |  | 
 | .. toctree:: | 
 |    s390x/vfio-ap | 
 |    s390x/css | 
 |    s390x/3270 | 
 |    s390x/vfio-ccw | 
 |    s390x/pcidevices | 
 |  | 
 | Architectural features | 
 | ====================== | 
 |  | 
 | .. toctree:: | 
 |    s390x/bootdevices | 
 |    s390x/protvirt |