GPU Passtrough on Linuxmint 21 0: Pretext This Setup requires 2 Graphic Cards (1ntegrated and one internal PCI Graphicscard - or - two internal PCI Graphic Cards) Also I am using and AMD CPU, remember to use the equivalents if you have an intel CPU. Also the Sound setup is for Pulseaudio. Install virt-manager sudo apt-get install virt-manager bridge-utils Create a Linux Bridge add the following to /etc/network/interfaces auto enp4s0 iface enp4s0 inet dhcp add the following to /etc/network/interfaces.d/br0 # static ip config file for br0 ## auto br0 iface br0 inet static address 192.168.178.10 broadcast 192.168.178.255 netmask 255.255.255.0 gateway 192.168.178.1 # If the resolvconf package is installed, you should not edit # the resolv.conf configuration file manually. Set name server here dns-nameservers 192.168.178.1 # If you have muliple interfaces such as eth0 and eth1 # bridge_ports eth0 eth1 bridge_ports enp4s0 bridge_stp off # disable Spanning Tree Protocol bridge_waitport 0 # no delay before a port becomes available bridge_fd 0 # no forwarding delay Step 1: Enable IOMMU edit /etc/default/grub at the line GRUB_CMDLINE_LINUX_DEFAULT so that it reads like GRUB_CMDLINE_LINUX_DEFAULT="quiet amd_iommu=on iommu=pt" Then reconfigure Grub sudo grub-mkconfig -o /boot/grub/grub.cfg Step 2: Tell VFIO we want to pass through the NVIDIA card lspci -nnk In my case the id of the GPU is 10de:17c8 and the HDMI sound output is 10de:0fb0. Note the part beneath the GPU where it says Kernel driver in use: nouveau.. If everything works correctly that should change by the time we're done. To flag the card for use by VFIO, create the file sudo nano /etc/default/grub at the line GRUB_CMDLINE_LINUX_DEFAULT with the contents: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash amd_iommu=on iommu=pt kvm.ignore_msrs=1 vfio-pci.ids=10de:17c8,10de:0fb0" Then reconfigure Grub sudo grub-mkconfig -o /boot/grub/grub.cfg Step 3: Create the Windows VM without GPU passthrough I recommend using virt-manager and setting up a regular Windows 10 VM using the default QXL video card before trying to do any passthrough stuff. When creating the VM, make sure to select "Customize before install" and set the Firmware option to "UEFI". Create the VM and go through the Windows installer until you have a working Windows 10 installation with no GPU passthrough, then shut down the VM. Step 4: Fix the Windows Code 43 error This error seems to happen because the NVIDIA driver realizes that it's running inside a VM and will disable itself. Since we don't want that we need to "hide" the fact that there's a VM from the driver. KVM has a mechanism for doing that but it's not exposed in virt-manager, so we'll need to edit the XML config for the virtual machine manually. To do that, run: sudo virsh edit win10 where win10 is the name of the VM that you gave when you created it inside virt-manager. You'll need to edit the contents of the tag in the following way: Inside the tag: add the line: (the actual value of the vendor_id is arbitrary, but it should be a 12 digit hex number). Inside the tag: add the line: Inside the tag: add the line: The end result should look something like: If you boot the machine up again, the NVIDIA driver should actually work! Windows will probably default to using the GPU as the primary card, which means that the Windows login prompt will likely appear on the display connected to the video card rather than the QXL display that you can see in virt-manager. Step 5: evdev keyboard and mouse switching Make sure the first line looks like this: See usb devices that you want to pass through (usualy the ones with event in the name) ls -l /dev/input/by-id/ edit /etc/libvirt/qemu.conf user = "anon" group = "root" cgroup_device_acl = [ "/dev/null", "/dev/full", "/dev/zero", "/dev/random", "/dev/urandom", "/dev/ptmx", "/dev/kvm", "/dev/kqemu", "/dev/rtc","/dev/hpet", "/dev/input/by-id/usb-Dell_Dell_USB_Keyboard-event-kbd", "/dev/input/by-id/usb-Logitech_USB-PS_2_Optical_Mouse-event-mouse" ] paste this in the very first line in xml: If it doesn’t, replace the first line with that. Next, add the following near the bottom, directly above “”: Step 6: switching from PS/2 to VirtIO As with many other technologies, VirtIO has the capacity to improve evdev virtual input devices’ responsiveness. It is not necessary to remove the PS/2 input devices and replace them. Instead, you can simply add VirtIO input devices to the LibVirt XML file, install the guest drivers, and profit! Find the following section of your XML: Add VirtIO mouse and keyboard devices, so in the end it looks like so:
Step 7: Patch Apparmor Edit /etc/apparmor.d/abstractions/libvirt-qemu paste: # Input /dev/input/* rw, Setup Audio in this configuration, we will get the vm sound and pass it on to the host system open /etc/pulse/daemon.conf and find/add/uncomment the lines and set these values: default-sample-rate = 44100 ... alternate-sample-rate = 48000 Step 8: use Pulse Audio Make sure the very first line of the file does read Instead of Check at the bottom of your config if a line exists. If yes make sure to add these options: In case is missing, find the line which ends with and add the following block afterwards: The 1000 in server=unix:/run/user/1000/pulse/native represents your user-id, 1000 is the default (one user) Id. Open the apparmor libvirt abstractions file /etc/apparmor.d/abstractions/libvirt-qemu and append the following: /etc/pulse/client.conf.d/ r, /etc/pulse/client.conf.d/* r, /run/user/1000/pulse/native rw, /home/your-username/.config/pulse/* r, /home/your-username/.config/pulse/cookie k, Also remember to replace "anon" with your own username CPU Pinning According to this Archwiki Article and Forum Post, I edited my XML https://wiki.archlinux.org/title/PCI_passthrough_via_OVMF#CPU_pinning https://bbs.archlinux.org/viewtopic.php?pid=1710966#p1710966 XML GamingVM 821f1a1d-c836-4c31-a136-2ab789064f56 8388608 8388608 4 1 hvm /usr/share/OVMF/OVMF_CODE_4M.ms.fd /var/lib/libvirt/qemu/nvram/GamingVM_VARS.fd destroy restart destroy /usr/bin/qemu-system-x86_64