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Re: [PATCH] xen/pt: fix igd passthrough for pc machine with xen accelerator
- To: Chuck Zmudzinski <brchuckz@xxxxxxx>, qemu-devel@xxxxxxxxxx
- From: Michael Tokarev <mjt@xxxxxxxxxx>
- Date: Wed, 17 May 2023 13:52:53 +0300
- Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>, Anthony Perard <anthony.perard@xxxxxxxxxx>, Paul Durrant <paul@xxxxxxx>, Paolo Bonzini <pbonzini@xxxxxxxxxx>, Richard Henderson <richard.henderson@xxxxxxxxxx>, Eduardo Habkost <eduardo@xxxxxxxxxxx>, "Michael S. Tsirkin" <mst@xxxxxxxxxx>, Marcel Apfelbaum <marcel.apfelbaum@xxxxxxxxx>, Igor Mammedov <imammedo@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx, qemu-stable@xxxxxxxxxx
- Delivery-date: Wed, 17 May 2023 10:53:10 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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@xxxxxxx>
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
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