[vfio-users] intel skylake passthrough

[nicolas prochazka]

Hello again,
for your attention,
I add   " { PCI_VENDOR_ID_INTEL, 0x9d70, pci_quirk_mf_endpoint_acs },  "
in drives/pci/quirck.c  from a 4.4.0 linux kernel,
and skylake internal sound card is now in it's own group, some test with
windows guest vm seems to be ok ( sound from audio jack and hdmi )

Regards,
Nicolas Prochazka

2016-01-22 17:03 GMT+01:00 Alex Williamson <alex.l.williamson at gmail.com>:

> On Fri, Jan 22, 2016 at 8:26 AM, nicolas prochazka <
> prochazka.nicolas at gmail.com> wrote:
>
>> Hello,
>> I just need a confimation,
>> with my nuc broadwell I can do passthrough of my sound card without
>> problem,
>> because of a good iommu group, but it seems impossible with my new
>> skylake nuc
>> group 7 is not viable ......
>>
>> please, tell me that a solution is possible .
>>
>
> Not without the ACS override patch, Intel really did a disservice to
> device assignment users with how they've combined more devices into
> multifunction sets on skylake and didn't bother to implement ACS.  We've
> had confirmation that some of the I219 NICs are isolated and we have quirks
> for them, but apparently not this one.  There's little hope of getting
> anyone's attention to verify whether the audio function is isolated.
> Thanks,
>
> Alex
>
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