GPU Passthrough

[supermew]

Hi,

 

I need some help passing my gpu to my windows vm.

I'm using Arch Linux with the latest kernel and the following gpus:

• GTX 1080 (which is placed in the first pcie slot to get x16, so it is used as boot gpu)
• GTX 1050 Ti (which is placed in the second last slot and only gets x8)

IOMMU is supported by all devices, the gpus are in different iommu groups and I don't have an iGPU

 

I want to passthough the 1080 to my qemu vm and use the 1050 Ti for the host system (maybe it's even possible to use it as boot gpu?)

 

Is there someone who can help me getting there?

If I forgot some information feel free to ask.

[Falconevo]

11 hours ago, supermew said:

Hi,

 

I need some help passing my gpu to my windows vm.

I'm using Arch Linux with the latest kernel and the following gpus:

• GTX 1080 (which is placed in the first pcie slot to get x16, so it is used as boot gpu)
• GTX 1050 Ti (which is placed in the second last slot and only gets x8)

IOMMU is supported by all devices, the gpus are in different iommu groups and I don't have an iGPU

 

I want to passthough the 1080 to my qemu vm and use the 1050 Ti for the host system (maybe it's even possible to use it as boot gpu?)

 

Is there someone who can help me getting there?

If I forgot some information feel free to ask.

https://wiki.archlinux.org/index.php/PCI_passthrough_via_OVMF

[Electronics Wizardy]

what have you tried?

 

Normally its much easier if your gpu you want to passthrough isn't the boot gpu, so id swap the gpus on your system.

 

 

[supermew]

How can I do an id swap?

[Roschlynn Dsouza]

5 hours ago, supermew said:

How can I do an id swap?

I think he meant this

"I would swap the GPU'S in the PCI-E slot."

He meant that you just interchange the gpu slots. Use the 1050TI for the boot one and use the 1080 for the VM.

 

[Roschlynn Dsouza]

On 5/16/2019 at 3:10 PM, supermew said:

• GTX 1080 (which is placed in the first pcie slot to get x16, so it is used as boot gpu)
• GTX 1050 Ti (which is placed in the second last slot and only gets x8)

Switch the 1050TI to the 1080 slot and the 1080 to the 1050TI slot such that the 1050TI gets x16 slot and the 1080 gets the x8.

Then pass through the 1080 to the VM 

[supermew]

Is it ok to put the 1080 in the x8 slot in terms of performance?

[supermew]

I managed to pass through the gpu and hide he kvm from windows. But if I try to install the nvidia driver my vm crashes and I'm not able to start it anymore, because it crashes everytime after the bot loading cirlcle screen