Hi there, Am 2021-04-09 00:37, schrieb Gokan Atmaca:
error: pci,host=0000:01:00.0,id=hostdev0,bus=pci.0,addr=0x9: vfio 0000:01:00.0: group 1 is not viable Please ensure all devices within the iommu_group are bound to their vfio bus driver.
This is a known issue with PCIe passthrough: depending on your mainboard and CPU, some PCIe devices will be grouped together, and you will either be able to forward _all_ devices in the group to the VM or none at all. (If you have a "server" GPU that supports SR-IOV you'd have additional options, but that doesn't appear to be the case.) This will highly depend on the PCIe slot the card is in, as well as potentially some BIOS/UEFI settings on PCIe lane distribution. First let's find out what devices are in the same IOMMU group. From your kernel log: [ 0.592011] pci 0000:00:01.0: Adding to iommu group 1 [ 0.594091] pci 0000:01:00.0: Adding to iommu group 1 [ 0.594096] pci 0000:01:00.1: Adding to iommu group 1 Could you check with "lspci" what these devices are in your case? If you are comfortable forwarding the other two devices into the VM as well, just add that to the list of passthrough devices, then this should work. If you need the other two devices on the host, then you need to either put the GPU into a different PCIe slot, put the other devices into a different PCIe slot, or find some BIOS/UEFI setting for PCIe lane management that separates the devices in question into different IOMMU groups implicitly. (BIOS/UEFI settings will typically not mention IOMMU groups at all, so look for "lane management" or "lane distribution" or something along those lines. You might need to drop some PCIe lanes from other devices and give them directly to the GPU you want to pass through in order for this to work, or vice-versa, depending on the specific situation.) Note: the GUI tool "lstopo" from the package "hwloc" is _very_ useful to identify how the PCIe devices are organized in your system and may give you a clue as to why your system is grouped together in the way it is. Hope that helps. Regards, Christian