Activating IOMMU support

[LogicalUnit]

Hello, I have a Dell OptiPlex 9020 running Proxmox 7.4-3

I have enabled VT for Direct I/O in the BIOS, but Proxmox tells me that IOMMU is not detected and I cannot virtualise PCI devices. Can someone help me with this?

 

[Folke]

Hi,
activating iommu can involve more than activating the support in your bios. The documentation lays out step for step what needs to be done [0].
In your case you are probably haven't added the kernel modules to /etc/modules yet.

[0] https://pve.proxmox.com/pve-docs/pve-admin-guide.html#qm_pci_passthrough

 

[LogicalUnit]

Hi,
activating iommu can involve more than activating the support in your bios. The documentation lays out step for step what needs to be done [0].
In your case you are probably haven't added the kernel modules to /etc/modules yet.

[0] https://pve.proxmox.com/pve-docs/pve-admin-guide.html#qm_pci_passthrough

Beautiful, thanks for the link!

 

[LogicalUnit]

Yep, updating the kernel commandline and kernel modules did the trick. I can pass through my Intel Graphics device now

 

[Folke]

Great to hear, happy virtualizing