[vfio-users] IGD passthrough / windows OS ram problem with new intel drivers

[nicolas prochazka]

Ok, how many chunk must be defined for x-igd-gms ?
Regards,
Nicolas

2017-05-18 18:32 GMT+02:00 Alex Williamson <alex.l.williamson at gmail.com>:
> On Thu, May 18, 2017 at 9:40 AM, nicolas prochazka
> <prochazka.nicolas at gmail.com> wrote:
>>
>> hello,
>> this issue can be corrected by setting x-igd-gms
>
>
> Yes, I've exchanged some email with Intel about this, it seems their Windows
> driver started handling lack of stolen memory as an invalid configuration.
> In the short term I think we'll probably see a driver update that re-enables
> this, longer term we've got some ideas how we can expose the host stolen
> memory range into guest as the x-igd-gms option is probably not fully
> virtualizing relocating it into the guest address space.  Those long term
> changes will require updates to the host kernel, QEMU and SeaBIOS/OVMF, so
> use the x-igd-gms option for now, look for that to be no longer required as
> you get guest driver updates, and at some point in the future we should have
> better support for this.  Thanks,
>
> Alex