Is there a way to force passthrough a PCIe device?

nero10578

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Nov 24, 2022
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I am runing the latest Truenas Scale Cobia 23.10.0.1 and I have 2x Nvidia Tesla P40 I want to Passthrough to a VM on a Supermicro X11SCA board. I know that the two PCIe slots are in one IOMMU group and I can passthrough the GPU just fine if I only use one. But as soon as I plug in two GPUs the Intel PCIe bridge gets grouped together as well.

AFAIK I should be able to just pass the bridge together with the GPUs to the VM and have it work. But the GUI is preventing me from doing that, is there a way to manually force passthrough a PCIe device? Is there a way to edit the VM config files like in proxmox?

Tesla P40 x2 and Intel PCI Bridge in IOMMU group 2
Screenshot 2023-11-18 100312.png


Screenshot 2023-11-18 100442.png


Screenshot 2023-11-18 100456.png

Truenas is preventing me from passing through the PCIe bridge.

Using midclt to use the API also gets blocked still.
Screenshot 2023-11-18 104629.png
 
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