Re: [Engine-devel] [libvirt]Supporting native USB in oVirt

Hi, On 05/10/2012 01:39 PM, Oved Ourfalli wrote: > Rephrasing my question a bit, to make it more clear. > We are now working on adding the support for native USB devices on oVirt. > > This requires adding composite PCI devices to a VM (details below), requiring specific set of restrictions on the addresses of these devices, and the connections between them. > Is it possible to add such a composite set of devices to a VM while using automatic address assignment, as we do today on the other PCI devices? To be clear, what the ovirt-engine people want to do (AFAIK), is add an EHCI controller with UHCI companion controllers to a vm, which would normally be done in the xml file like this: <controller type='usb' index='0' model='ich9-ehci1'> <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x7'/> </controller> <controller type='usb' index='0' model='ich9-uhci1'> <master startport='0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0' multifunction='on'/> </controller> <controller type='usb' index='0' model='ich9-uhci2'> <master startport='2'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x1'/> </controller> <controller type='usb' index='0' model='ich9-uhci3'> <master startport='4'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x2'/> </controller> Without manually specifying the addresses, ie they want to be able to write something like: <controller type='usb' index='0' model='ich9-ehci1'> </controller> <controller type='usb' index='0' model='ich9-uhci1'> <master startport='0'/> </controller> <controller type='usb' index='0' model='ich9-uhci2'> <master startport='2'/> </controller> <controller type='usb' index='0' model='ich9-uhci3'> <master startport='4'/> </controller>