Il 12/09/2014 20:18, Gabriel L. Somlo ha scritto: >> > Now *that* is really strange, especially as UHCI1 is pci function 0, >> > without probing that successfully you wouldn't see the other pci >> > functions (1+2+7 for uhci2+uhci3+ehci) in the same slot in the first >> > place. > I've only ever skimmed through the PCI spec at high speed, and have no > real clue about USB, but one thing I noticed is that by default, the > q35 uhci1-3 and ehci1 devices all share the same pci device (1d). > > If I explicitly create "-device ich9-usb-ehci1" and > "-device ich9-usb-ehci1" via the command line, they each get their own > distinct PCI device number, and hanging mice and keyboards off of them > works in that case. > > Feel free to ignore me because I'm likely wrong, but any chance there > might be some bug related to how all these share a pci device number in > the default setup ?
So it could be an OVMF bug related to multifunction devices. Well, you could try moving devices around in different functions. You could try moving ehci1 to 0 and the UHCIs to 1/2/7. Or drop uhci2/uhci3 and move the two remaining devices around. Once you have three combinations that work (e.g. 0/4, 0/6, 0/7) you could use it to add three UHCI controllers (in the above examples, it would be 0/1/2/7). Remember that one of the two must be xx.0, the other can be anything from xx.1 to xx.7. Paolo
