<domain type='qemu'> <name>guest</name> <uuid>1ccfd97d-5eb4-478a-bbe6-88d254c16db7</uuid> <memory unit='KiB'>524288</memory> <vcpu placement='static'>1</vcpu> <os> <type arch='ppc64' machine='pseries'>hvm</type> </os> <devices> <emulator>/usr/bin/qemu-system-ppc64</emulator> <!-- This device will cause a new PHB to be created because of its address --> <controller type='scsi' model='virtio-scsi'> <address type='pci' domain='0x0000' bus='0x01' slot='0x01' function='0x0'/> </controller> <!-- This hostdev will share the same PHB as the SCSI controller despite being in the separate isolation group 1 (IOMMU group 0), because the address has been requested explicitly by the user --> <hostdev mode='subsystem' type='pci' managed='yes'> <driver name='vfio'/> <source> <address domain='0x0001' bus='0x01' slot='0x00' function='0x0'/> </source> <address type='pci' domain='0x0000' bus='0x01' slot='0x02' function='0x0'/> </hostdev> <!-- This hostdev can use neither the PHB that was just created, nor the default one, because it's in isolation group 2 (IOMMU group 1) --> <hostdev mode='subsystem' type='pci' managed='yes'> <driver name='vfio'/> <source> <address domain='0x0005' bus='0x90' slot='0x01' function='0x0'/> </source> </hostdev> <controller type='usb' model='none'/> <memballoon model='none'/> </devices> </domain>