On Sun, 26 Aug 2018 23:15:02 +0800
Acewind <acew...@gmail.com> wrote:
> I pass through Intel Corporation HD Graphics 530, an IGD card to windows 7
> vm by legacy mode, in fedora 25(kernel=4.8.6, qemu=2.7).
> I can see windows output on the screen successfully, but always confused
> graphic during booting and low resolution (640*480) when running.
> After installation of driver downloaded from Intel official website,
> nothing improved, and the driver show error code 43.
>
> >From the view of driver, what’s the difference between an original,
> physical IGD and a passed through IGD? Any functions disappeared? What
> should I do to correct the error？ Or there’s another version of driver？
I think you've already resolved with by adding stolen memory to the
configuration, it's nice to follow-up to the mailing list thread so the
next person to hit this issue can find the resolution. This can be
done in libvirt by adding:
<qemu:commandline>
<qemu:arg value='-set'/>
<qemu:arg value='device.hostdev0.x-igd-gms=1'/>
</qemu:commandline>
Within the <domain> section and specifying the opening of the <domain>
section as:
<domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
These sorts of x- options are really the only time we should be using
<qemu:arg> entries for vfio devices.
Of course on the QEMU commandline, it's simply a matter of adding
x-igd-gms=1 to the vfio-pci -device option list. Thanks,
Alex
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