December 18, 20205 yr One of our servers has two AMD Epyc 7402 CPUs. When I go to add a VM, no PCIe devices show up. No GPUs, no USB controllers, no network cards, nothing. I can see all the devices under System Devices and when I run lspci. The USB controllers on the Nvidia GPUs have been stubbed out. The USB controller has been stubbed out. The 10Gbps NICs have been stubbed out. What am I missing? Is there a setting I need to enable?
January 14, 20215 yr Author I figured it out. I had to go and enable "IOMMU" (it's called Direct I/O on Intel boards) under some obscure submenu on the AMD CBS page of the BIOS.
January 14, 20215 yr 5 hours ago, Brad the Beast said: I figured it out. I had to go and enable "IOMMU" (it's called Direct I/O on Intel boards) under some obscure submenu on the AMD CBS page of the BIOS. Yeah they like to hide that.
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