Discussion about x-igd-opregion

[Du, Changbin]

On Thu, Apr 26, 2018 at 07:10:12PM +0200, Laszlo Ersek wrote:
> On 04/26/18 18:53, Alex Williamson wrote:
> > [CC +Laszlo, Gerd, Jack]
> 
> (thanks!)
> 
> > From there, it's already been proposed that a GVT-g device could expose
> > a UEFI compatible option ROM that could potentially enable the opregion
> > on its own, which seems like a better option to pursue before we ask
> > EDK2 to incorporate opregion handling.  Thanks,
> 
> Indeed.
> 
It seems exposing Option ROM is the best choice unless gfx driver can get rid of
opregion. As I have posted on OVMF BZ935, we have worked out a patch to
implement this feature. In that patch, I use the IgdAssignment efi module which
was build from Laszlo's patch. I know Gerd also has a implementation and that
eif module should work fine, too.

Hi Laszlo, if you agree, I will make a formal kernel patch which includes the
efi moudle. And thanks for all of your help, including Alex, Jack and Gerd!

> ATM I don't have anything to add, beyond the following link:
> 
>   https://bugzilla.tianocore.org/show_bug.cgi?id=935
> 
> (Apologies if it has been referenced in the thread already.)
> 
> Thanks,
> Laszlo
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-- 
Thanks,
Changbin Du