GPU Passthrough to Windows 11 using libvirt/qemu
In my last post I installed Windows 11 in a virtual machine. But just a plain virtual machine with Windows 11 isn't much fun, so lets give the virtual machine a GPU to pl...
17th Jan 2022
Install Windows 11 in virtual machine using virt-manager
Lets install Windows 11 in a virtual machine using an emulated TPM module. It can be useful to have a virtual Windows machine for some software. Install SWTPM - Emulate...
15th Jan 2022
Debian SID, Fix broken graphics output with GPU passthrough
I realized I had no graphics output before Windows has loaded in my virtual machine with GPU passthrough. Or if I was using a FreeBSD/Linux VM I had no graphics until Xor...
13th Jan 2022
Dual NVIDIA GPU with passthrough on Debian
I have a brand new Gigabyte x570 Aorus Pro, this motherboard has super awesome iommu groups. Finally can I use both my NVME drives and two GPUs. My old Ryzen 5 3600 cpu d...
1st Nov 2021
Restore data from QCow2 missing backing file (data recovery part 4)
I have successfully restored data from my QCow2 file with a missing backing file. I wrote lots of C code to be able to convert the QCow2 file into an IMG file. Then I fou...
30th Nov 2020
QCow2 File format (data recovery part 2)
QCow2 image file is used by Qemu for virtual harddrive images. I will not go into any details about the file format, I will only scratch the surface enough to be able to...
26th Nov 2020
Failed at backup... (data recovery part 1)
So everywhere can you read about how important it is to backup your data. Are you actually doing it? I don't do it, although I have a private git server where I store som...
24th Nov 2020
Isolating CPU cores from VM host
It is possible to isolate the CPU cores/threads from the Host OS, so it will not use those cores/threads for anything. This is done by using the isolcpus paramater to...
3rd Oct 2020
Activate hugepages to use with libvirt
Hugepages is a good way to improve performance on virtual machines, as it will pre-allocate lots of RAM dedicated for use by libvirt/qemu, or something else that can use...
18th Sep 2020
Libvirt automatic USB passthrough scripts
Short guide to setup automatic USB passthrough for a virtual machine. With these scripts it is possible to dedicate USB port(s) for one virtual machine. Anything plugged...
9th Aug 2020
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