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Linux KVM GPU pass-through

Passing-through a GPU to a virtual machine requires loading vfio-pci, instead of the "normal" GPU driver. Normally you use the device-ids to select the graphic card for the virtual machine, but what if they share the same id?

The AMD Ryzen ThreadRipper CPU is, thanks to the enormous core count, perfect for virtualization. By passing an graphic card to the VM it's possible achieve almost bare metal GPU performance, which is important for gaming or the use of graphical intensive software (like Adobe Photoshop).