11:44 a.m.
Greetings,
I have a server that run a vm with several nic pcie cards as pass-though.
the board has an intel gpu and the hdmi output is not used.
I thought of booting up another vm and pass the gpu into it.
I found several discussions on the subject stating that it isn't possible but all of
them are several years old.
I wonder if that has changed? is there a way to pt the vga to a vm?
Thanks,
Dagg.
2:11 a.m.
On Sat, Aug 08, 2020 at 06:44:26PM +0200, daggs wrote:
Greetings,
I have a server that run a vm with several nic pcie cards as pass-though.
the board has an intel gpu and the hdmi output is not used.
I thought of booting up another vm and pass the gpu into it.
I found several discussions on the subject stating that it isn't possible but all of
them are several years old.
I wonder if that has changed? is there a way to pt the vga to a vm?
Thanks,
Dagg.
Hi,
libvirt has supported host device assignment for quite some time, so from that
perspective, you can follow [1] and see if your card works in the VM. The GPU
assignment involves the userspace VFIO driver and there are a few factors in
play which may render the assignment either not work at all or work with
limitations. In any case, this question would be better asked at
vfio-users(a)redhat.com mailing list should you experience any issues with [1].
Regards,
Erik
[1] https://libvirt.org/formatdomain.html#host-device-assignment
PS: You can even try assigning the GPU from within virt-manager which produces
the right XML bits for libvirt. I've never tried assigning an integrated Intel
GPU on my laptop (for obvious reasons), so I can't give you the kind of answer
guaranteeing this would work 100%.
10:40 a.m.
Greetings Erik,
Sent: Tuesday, August 11, 2020 at 10:11 AM
From: "Erik Skultety" <eskultet(a)redhat.com>
To: "daggs" <daggs(a)gmx.com>
Cc: libvirt-users(a)redhat.com
Subject: Re: pass-though Intel gpu int o a vm
On Sat, Aug 08, 2020 at 06:44:26PM +0200, daggs wrote:
> Greetings,
>
> I have a server that run a vm with several nic pcie cards as pass-though.
> the board has an intel gpu and the hdmi output is not used.
> I thought of booting up another vm and pass the gpu into it.
> I found several discussions on the subject stating that it isn't possible but
all of them are several years old.
> I wonder if that has changed? is there a way to pt the vga to a vm?
>
> Thanks,
>
> Dagg.
>
Hi,
libvirt has supported host device assignment for quite some time, so from that
perspective, you can follow [1] and see if your card works in the VM. The GPU
assignment involves the userspace VFIO driver and there are a few factors in
play which may render the assignment either not work at all or work with
limitations. In any case, this question would be better asked at
vfio-users(a)redhat.com mailing list should you experience any issues with [1].
I'll try ask them, thanks.
Regards,
Erik
[1] https://libvirt.org/formatdomain.html#host-device-assignment
PS: You can even try assigning the GPU from within virt-manager which produces
the right XML bits for libvirt. I've never tried assigning an integrated Intel
GPU on my laptop (for obvious reasons), so I can't give you the kind of answer
guaranteeing this would work 100%.
the system in question is a headless server so virt-manager is nto an option.
thanks for the suggestion thought.
Dagg.
11:23 a.m.
> PS: You can even try assigning the GPU from within virt-manager
which produces
> the right XML bits for libvirt. I've never tried assigning an integrated Intel
> GPU on my laptop (for obvious reasons), so I can't give you the kind of answer
> guaranteeing this would work 100%.
>
>
the system in question is a headless server so virt-manager is nto an option.
thanks for the suggestion thought.
virt-manager can connect to libvirtd running on the headless server machine
remotely, so I still think it could be of help to you ;).
Erik
11:46 a.m.
what is the proper uri to use?
Sent: Wednesday, August 12, 2020 at 7:23 PM
From: "Erik Skultety" <eskultet(a)redhat.com>
To: "daggs" <daggs(a)gmx.com>
Cc: libvirt-users(a)redhat.com
Subject: Re: pass-though Intel gpu int o a vm
> > PS: You can even try assigning the GPU from within virt-manager which produces
> > the right XML bits for libvirt. I've never tried assigning an integrated
Intel
> > GPU on my laptop (for obvious reasons), so I can't give you the kind of
answer
> > guaranteeing this would work 100%.
> >
> >
> the system in question is a headless server so virt-manager is nto an option.
> thanks for the suggestion thought.
virt-manager can connect to libvirtd running on the headless server machine
remotely, so I still think it could be of help to you ;).
Erik
1:31 p.m.
On 8/12/20 12:46 PM, daggs wrote:
what is the proper uri to use?
If you run virt-manager on some other machine, then select "File / New
Connection", you will get a dialog box that will prompt you for the info
needed, and create the proper URI for you. Utually it is
"qemu+ssh://root@$remotehost/system".
> Sent: Wednesday, August 12, 2020 at 7:23 PM
> From: "Erik Skultety" <eskultet(a)redhat.com>
> To: "daggs" <daggs(a)gmx.com>
> Cc: libvirt-users(a)redhat.com
> Subject: Re: pass-though Intel gpu int o a vm
>
>>> PS: You can even try assigning the GPU from within virt-manager which
produces
>>> the right XML bits for libvirt. I've never tried assigning an integrated
Intel
>>> GPU on my laptop (for obvious reasons), so I can't give you the kind of
answer
>>> guaranteeing this would work 100%.
>>>
>>>
>> the system in question is a headless server so virt-manager is nto an option.
>> thanks for the suggestion thought.
>
> virt-manager can connect to libvirtd running on the headless server machine
> remotely, so I still think it could be of help to you ;).
>
> Erik
>
>
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