Adding nointxmask=1 worked! With no issues at all. I think because all
the devices are getting their own interrupts (on the host) anyway.
So do you want me to try to add the card to quirks.c? I could probably
manage it, just I haven't compiled a kernel in ~50 years.
Alex Williamson wrote:
I'd guess the device probes OK for DisINTx support, but it doesn't
actually work, the interrupt continues to fire but vfio-pci says "not
my interrupt, my device is masked", when actually it is. There's a
vfio-pci module option, nointxmask=1 you can use to disable this PCI
2.3 required feature and mask at the IOAPIC instead. The difficulty is
that vfio needs to be able to get an exclusive interrupt for the
device when using IOAPIC masking, which might mean you need to unbind
anything sharing the interrupt in the host. The extra bummer is that
it's a global option, so you'll need to do the same for all other
assigned devices. If it works, we can specifically blacklist the device
in the kernel (drivers/pci/quirks.c) using the quirk_broken_intx_masking
function in the fixup so that the vfio-pci module option is not
required and you'll only need to make sure the audio card has an
exclusive interrupt. TL;DR, the device probes ok for an interrupt
masking feature it doesn't support and interrupts for the card die.
Thanks,
_______________________________________________
vfio-users mailing list
vfio-users@redhat.com
https://www.redhat.com/mailman/listinfo/vfio-users
