Greetings kram,
did it worked if you pass-though the gpu only, e.g. you see image but no sound?
if so, there is a patch floating around which will disable the iommu gorupings or something like that, it is a "breach of security" patch but it might do the trick.
Sent: Wednesday, August 12, 2020 at 10:08 PM
From: "kram threetwoone" <kram...@gmail.com>
To: "Alex Williamson" <alex.william...@redhat.com>
Cc: "vfio-users" <vfio-users@redhat.com>
Subject: Re: [vfio-users] pci passthrough of Intel igp
From: "kram threetwoone" <kram...@gmail.com>
To: "Alex Williamson" <alex.william...@redhat.com>
Cc: "vfio-users" <vfio-users@redhat.com>
Subject: Re: [vfio-users] pci passthrough of Intel igp
Funny this should come up, I was just trying to get mine to work last night.
Here is the relevant into: https://hastebin.com/raw/oximifikim
Every time I tried to boot my QEMU, the error came back "group 1 used in multiple address spaces"
The device is in it's own vfio group, and I've blacklisted the entire linux sound core module to try and prevent the OS from touching the audio. I'm not sure if this is necessary but I'm just trying anything.
Alex thanks for the tip on looking into x-igd-gms, I haven't read about that anywhere.
The hardware is an Odroid H2, Intel J4105 processor using Intel UHD 605.
On Wed, Aug 12, 2020 at 10:04 AM Alex Williamson <alex.william...@redhat.com> wrote:
On Wed, 12 Aug 2020 17:46:33 +0100
"Patrick O'Callaghan" <p...@usb.ve> wrote:
> On Wed, 2020-08-12 at 18:02 +0200, daggs wrote:
> > Greetings,
> >
> > I have a machine with an Intel igp of HD Graphics 610 [8086:5902].
> > I found several discussions on the subject stating that it isn't possible but all of them are several years old.
> > so I wanted to know if it is possible to pass it to a vm?
> > I'm using kernel 5.4.43, libvirt-6.6.0 and qemu-5.0.0.
>
> If this is your only GPU, it doesn't make much sense. The idea of
> passthrough is to let the VM control an additional GPU, not the main
> one.
There are plenty of people trying to assign their primary graphics
device, it makes perfect sense for someone that doesn't intend to run a
graphical environment on the host. Assigning the primary GPU can be
more challenging, but that doesn't mean it isn't done.
For daggs, I can only say try it yourself, I don't know of any specific
reason it wouldn't work, but direct assignment of IGD is a fair bit of
luck anyway since the hardware is constantly changing and we don't
really keep up with it. You might need to play with the x-igd-gms
value on the vfio-pci device in QEMU, several people have found that
x-igd-gms=1 is necessary on some versions of hardware. Thanks,
Alex
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