[ovirt-users] GPU Passthrough issues with oVirt 4.5

[Vinícius Ferrão via Users]

Hello, does anyone is having issues with device passthrough on oVirt 4.5?

I can passthrough the devices without issue to a given VM, but inside the VM it 
fails to recognize all the devices.

In my case I’ve added 4x GPUs to a VM, but only one show up, and there’s the 
following errors inside the VM:

[   23.006655] nvidia :0a:00.0: enabling device ( -> 0002)
[   23.008026] NVRM: This PCI I/O region assigned to your NVIDIA device is 
invalid:
   NVRM: BAR1 is 0M @ 0x0 (PCI::0a:00.0)
[   23.008035] NVRM: This PCI I/O region assigned to your NVIDIA device is 
invalid:
   NVRM: BAR2 is 0M @ 0x0 (PCI::0a:00.0)
[   23.008040] NVRM: This PCI I/O region assigned to your NVIDIA device is 
invalid:
   NVRM: BAR3 is 0M @ 0x0 (PCI::0a:00.0)
[   23.008045] NVRM: This PCI I/O region assigned to your NVIDIA device is 
invalid:
   NVRM: BAR4 is 0M @ 0x0 (PCI::0a:00.0)
[   23.008049] NVRM: This PCI I/O region assigned to your NVIDIA device is 
invalid:
   NVRM: BAR5 is 0M @ 0x0 (PCI::0a:00.0)
[   23.012339] NVRM: The NVIDIA GPU :0a:00.0 (PCI ID: 10de:1db1)
   NVRM: installed in this system is not supported by the
   NVRM: NVIDIA 535.54.03 driver release.
   NVRM: Please see 'Appendix A - Supported NVIDIA GPU Products'
   NVRM: in this release's README, available on the operating system
   NVRM: specific graphics driver download page at www.nvidia.com.
[   23.016175] nvidia: probe of :0a:00.0 failed with error -1
[   23.016838] NVRM: This PCI I/O region assigned to your NVIDIA device is 
invalid:
   NVRM: BAR0 is 0M @ 0x0 (PCI::0b:00.0)
[   23.016842] nvidia: probe of :0b:00.0 failed with error -1
[   23.017211] NVRM: This PCI I/O region assigned to your NVIDIA device is 
invalid:
   NVRM: BAR0 is 0M @ 0x0 (PCI::0c:00.0)
[   23.017215] nvidia: probe of :0c:00.0 failed with error -1
[   23.017248] NVRM: The NVIDIA probe routine failed for 3 device(s).
[   23.214409] NVRM: loading NVIDIA UNIX x86_64 Kernel Module  535.54.03  Tue 
Jun  6 22:20:39 UTC 2023
[   23.485704] [drm] [nvidia-drm] [GPU ID 0x0900] Loading driver
[   23.485708] [drm] Initialized nvidia-drm 0.0.0 20160202 for :09:00.0 on 
minor 1

On the host this shows up on dmesg, but seems right:

[  709.572845] vfio-pci :1a:00.0: vfio_ecap_init: hiding ecap 0x1e@0x258
[  709.572877] vfio-pci :1a:00.0: vfio_ecap_init: hiding ecap 0x19@0x900
[  709.572883] vfio-pci :1a:00.0: vfio_ecap_init: hiding ecap 0x23@0xac0
[  710.660813] vfio-pci :1d:00.0: vfio_ecap_init: hiding ecap 0x1e@0x258
[  710.660845] vfio-pci :1d:00.0: vfio_ecap_init: hiding ecap 0x19@0x900
[  710.660851] vfio-pci :1d:00.0: vfio_ecap_init: hiding ecap 0x23@0xac0
[  711.748760] vfio-pci :1e:00.0: vfio_ecap_init: hiding ecap 0x1e@0x258
[  711.748791] vfio-pci :1e:00.0: vfio_ecap_init: hiding ecap 0x19@0x900
[  711.748797] vfio-pci :1e:00.0: vfio_ecap_init: hiding ecap 0x23@0xac0
[  712.836687] vfio-pci :1c:00.0: vfio_ecap_init: hiding ecap 0x1e@0x258
[  712.836718] vfio-pci :1c:00.0: vfio_ecap_init: hiding ecap 0x19@0x900
[  712.836725] vfio-pci :1c:00.0: vfio_ecap_init: hiding ecap 0x23@0xac0


Thanks.

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[ovirt-users] GPU passthrough

[Darin Schmidt]

If I'm reading through the documents correctly, you can't use consumer
grade gpus such as gtx 1080's and assign them to a VM?

I'm trying to do something similar to how Linus used untaid to build
several gaming machines from one.

Any help would be appreciated.

Thanks.
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Re: [ovirt-users] gpu passthrough

[qinglong.d...@horebdata.cn]

It worked. Thanks a lot!
 
From: Darrell Budic
Date: 2017-02-22 00:37
To: qinglong.d...@horebdata.cn
CC: users
Subject: Re: [ovirt-users] gpu passthrough
I think you need to click the “down arrow” under the top box, should move the 
GPU into the “Host Devices to be attached” box, then hit Ok to make the 
assignment.

On Feb 21, 2017, at 3:26 AM, qinglong.d...@horebdata.cn wrote:

Hi, all:
I want to assign the gpu card of one host to the vm which is running in 
the host.

After I click "OK", I got nothing. Anyone can help? Thanks!
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Re: [ovirt-users] gpu passthrough

[Darrell Budic]

I think you need to click the “down arrow” under the top box, should move the 
GPU into the “Host Devices to be attached” box, then hit Ok to make the 
assignment.

> On Feb 21, 2017, at 3:26 AM, qinglong.d...@horebdata.cn wrote:
> 
> Hi, all:
> I want to assign the gpu card of one host to the vm which is running 
> in the host.
> 
> After I click "OK", I got nothing. Anyone can help? Thanks!
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Re: [ovirt-users] gpu passthrough

[Martin Polednik]

On 21/02/17 17:26 +0800, qinglong.d...@horebdata.cn wrote:

Hi, all:
   I want to assign the gpu card of one host to the vm which is running in 
the host.
   After I click "OK", I got nothing. Anyone can help? Thanks!


Hi,

Please define nothing. Did the VM not start? Or has it started but
there was no GPU output?

In the second case, it's still possible to use SPICE and list devices
in the VM (depends on the OS) to see whether the GPU is there -- it
could be that it's present but doesn't output anything.


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