I have 2 GPUs. FIrst one is AMD, and I am adding a second one, NVIDIA. It was already running with AMD so all the drivers were installed. No drivers are installed for NVIDIA. NVIDIA will be used in the VM environment only.
Install Qemu/KVM
TODO
Enable IOMMU (both in BIOS and Kernel)
In kernel, you can enable it using this command line argument:
> sudo vim /etc/default/grub
GRUB_CMDLINE_LINUX="... intel_iommu=on" # edit this line and add this new flag
> sudo grub2-mkconfig -o /boot/grub2/grub.cfg # update with the changes
> sudo rebootDetach the Second GPU from the Host
> virsh nodedev-list # list devices you'd like to detach
> lspci # also you can get numbers here to match with the above command's output
# now attach all relevant devices
> virsh nodedev-detach pci_0000_03_00_0
> virsh nodedev-detach pci_0000_03_00_1Creating VM
References
[1] https://unix.stackexchange.com/questions/546572/virt-manager-kvm-is-not-available
[2] https://discussion.fedoraproject.org/t/libvirtd-stop-responding-after-some-time/84324/2
[3] https://discussion.fedoraproject.org/t/virtual-machine-manager-showing-qemu-kvm-connecting/83961/14
[4] https://discussion.fedoraproject.org/t/virtual-machine-manager-showing-qemu-kvm-connecting/83961
[5] https://gist.github.com/paul-vd/5328d8eb2c626dff36ee143da2e85179
[6] https://forum.level1techs.com/t/fedora-33-ultimiate-vfio-guide-for-2020-2021-wip/163814
[7] https://forums.rockylinux.org/t/rocky-9-1-adding-intel-iommu-on-to-kernel/9747/3
[8] https://www.reddit.com/r/VFIO/comments/qctw7h/detach_nvidia_gpu_without_stopping_graphic_session/