[vfio-users] Problems passing through Creative X-Fi PCIe sound card

[Michael Slade]

Pardon the delay, but from some testing this appears to work.

I have other minor issues with sound in windows but I can't rule out 
timing or other issues.  I was able to make things work by turning off 
audio driver acceleration.



Alex Williamson wrote:
> On Fri, 14 Feb 2020 00:17:43 +1100
> Michael Slade <mslade at epic-code.com.au> wrote:
>
>> 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.
> Great!  I think the below should work for a quirk, if you can manage to
> build a kernel and try it (removing the nointxmask option), it would be
> much appreciated.  Thanks,
>
> Alex
>
> diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
> index 29f473ebf20f..3fce64ec6d63 100644
> --- a/drivers/pci/quirks.c
> +++ b/drivers/pci/quirks.c
> @@ -3385,6 +3385,13 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x37d0, quirk_broken_intx_masking);
>   DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x37d1, quirk_broken_intx_masking);
>   DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x37d2, quirk_broken_intx_masking);
>   
> +/*
> + * Creative Labs EMU20k2
> + * https://www.redhat.com/archives/vfio-users/2020-February/msg00001.html
> + */
> +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CREATIVE, PCI_DEVICE_ID_CREATIVE_20K2,
> +			quirk_broken_intx_masking);
> +
>   static u16 mellanox_broken_intx_devs[] = {
>   	PCI_DEVICE_ID_MELLANOX_HERMON_SDR,
>   	PCI_DEVICE_ID_MELLANOX_HERMON_DDR,
>

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