The guest will attempt to boot from devices in the order they appear here.
+
-Disks, optical drives and passed-through storage USB devices will be directly
-booted from, NICs will load PXE, and PCIe devices will either behave like disks
-(e.g. NVMe) or load an option ROM (e.g. RAID controller, hardware NIC).
+Disks, optical drives and storage USB devices that are passed through will be
+directly booted from, NICs will load PXE, and PCIe devices will either behave
+like disks (e.g. NVMe) or load an option ROM (e.g. RAID controller, hardware NIC).
+
Note that only devices in this list will be marked as bootable and thus loaded
by the guest firmware (BIOS/UEFI). If you require multiple disks for booting
`host`=`<HOSTPCIID[;HOSTPCIID2...]>` ;;
-Host PCI device pass through. The PCI ID of a host's PCI device or a list
+Pass through host PCI device. The PCI ID of a host's PCI device or a list
of PCI virtual functions of the host. HOSTPCIID syntax is:
+
'bus:dev.func' (hexadecimal numbers)