February 14, 201511 yr I have passthrough working with a single MSI GTX970 GPU on an AMD motherboard (GA990FXA-UD5) with the same AMD CPU. I noticed that your syslinux.cfg file did not have a lot of the AMD specific info that is recommended. This could be part of your problem. my syslinux.cfg file includes the following append amd_iommu=on iommu=pt iommu=1 vfio_iommu_type1.allow_unsafe_interrupts=1 pcie_acs_override=downstream initrd=/bzroot but as always ymmv.
February 15, 201511 yr Syslinux.cfg 101 The only statement you WILL need in there to ensure clean operations with VFIO is this: pcie_acs_override=downstream Hey! Do I need this for every VM or only if I want to passthrough a GPU? I only want to passthrough USB devices...
February 15, 201511 yr Author Syslinux.cfg 101 The only statement you WILL need in there to ensure clean operations with VFIO is this: pcie_acs_override=downstream Hey! Do I need this for every VM or only if I want to passthrough a GPU? I only want to passthrough USB devices... That syslinux line is for PCI device pass through. If you are not passing through any PCI devices to any VM, you don't need it.
April 23, 201511 yr When setting up a VM through the GUI to enable PCI passthrough of tuners, would I need to amend any cfg or go files? I tried to setup a VM to run Ubuntu, but failed to passthrough my devices.
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