[vfio-users] VGA Passthrough fails without NoSnoop patch

[Javier Celaya]

The host kernel is version 4.9.0 from Debian Sid. That command outputs
"f0105a". What does it mean?


Javi

2017-01-29 22:53 GMT+01:00 Alex Williamson <alex.l.williamson at gmail.com>:

> What's the host kernel?  The NoSnoop patch was deprecated in favor of a
> host kernel solution that enables an interaction between vfio and KVM.
> That went into the v3.15 kernel, I think.  Otherwise, I guess it's possible
> that your iommu reports that it supports snoop control in the iommu but
> it's broken or doesn't work for some reason.  What does this report?
>
> cat /sys/bus/pci/devices/0000\:01\:00.0/iommu/intel-iommu/ecap
>
>
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