Re: [PATCH] xen/pt: fix igd passthrough for pc machine with xen accelerator

[Michael Tokarev]

17.05.2023 12:47, Chuck Zmudzinski wrote:
> On 5/17/2023 2:39 AM, Michael Tokarev wrote:
> > 08.02.2023 05:03, Chuck Zmudzinski wrote:...
> > > Fixes: 998250e97661 ("xen, gfx passthrough: register host bridge specific to 
> > > passthrough")
> > > Signed-off-by: Chuck Zmudzinski <brchuckz@aol.com>
> >
> > Has this change been forgotten?  Is it not needed anymore?
>
> Short answer:
>
> After 4f67543b ("xen/pt: reserve PCI slot 2 for Intel igd-passthru ") was
> applied, I was inclined to think this change is not needed anymore, but
> it would not hurt to add this change also, and now I think it might be
> more correct to also add this change.
...

Well, there were two machines with broken IDG passthrough in xen, now
there's one machine with broken IDG passthrough. Let's fix them all :)
Note this patch is tagged -stable as well.

> If you want to add this change also, let's make sure recent changes to the
> xen header files do not require the patch to be rebased before committing
> it.

It doesn't require rebasing, it looks like, - just built 8.0 and current master
qemu with it applied.  I haven't tried the actual IDG passthrough, though.

It just neeeds to be picked up the usual way as all other qemu changes goes in.

Thanks,

/mjt