Hi, > OK, so I forgot to articulate that with the above patch, I'm seeing > *both* uhci2 and uhci3, but not uhci1. Basically, if uhciX has an > irq_pin less than 2, it won't show up in OSX if booted with ovmf. > We're no longer looking at PIIX, this is q35 with ovmf or without.
Can you test what happens with piix4 + usb2? (I suspect you can't as osx will simply not boot then due to the piix4 being much older than the intel port of osx). I think ovmf simply doesn't get the IRQ routing right (doesn't initialize PCI_INTERRUPT_LINE register correctly). It is *not* the same on piix and q35. See piix_pci_slot_get_irq vs. mch_pci_slot_get_irq in seabios source code. I think if you boot linux guests with "noacpi" it will have trouble with usb interrupts too. cheers, Gerd
