On 09/09/16 03:21, Brett Peckinpaugh wrote: > I am running Arch Linux, ACS patch on a Skylake system. I have some > audio pop and crackle so wanted to try passing a sound card instead of > routing the audio from my monitor to my speakers. I purchased an Asus > Xonar PCI DGX. Chip is CMI8788. I can boot the host with it, or my USB > card. But not both. Error I get is as follows. > > Error starting domain: internal error: qemu unexpectedly closed the > monitor: 2016-09-09T01:17:41.729237Z qemu-system-x86_64: -device > vfio-pci,host=0e:00.0,id=hostdev3,bus=pci.0,addr=0x6: vfio: Error: > Failed to setup INTx fd: Device or resource busy > 2016-09-09T01:17:41.729854Z qemu-system-x86_64: -device > vfio-pci,host=0e:00.0,id=hostdev3,bus=pci.0,addr=0x6: Device > initialization failed
http://vfio.blogspot.hu/2014/09/vfio-interrupts-and-how-to-coax-windows.html VFIO does also have support for non-PCI-2.3 compliant devices, but it requires a much more restricted configuration. We still need to identify when the assigned device is signaling an interrupt, which we can only do in a non-device specific way by requiring only a single device per interrupt line. Also when this is the case, we can mask the interrupt at the system APIC rather than at the device itself. Therefore we can achieve the same results, but we require an exclusive interrupt line for the device, which can often be an insurmountable configuration restriction. [...] If you find that your device supports MSI but it's not being enabled, and your guest is Windows, you can follow the steps found here to attempt to enable it. [...] You can also try moving the card(s) to different slots: [...] PCI bridges also incorporate a standard swizzle to remap interrupt lines between primary and secondary interfaces, so that we don't over-use some of the interrupt lines. Each slot may also have different mappings, so INTA on one slot doesn't actually pull the same line as INTA on another slot. _______________________________________________ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
