Suggested Reading
NOTE: See my Windows 10 VM article for a precursor to setting up and installing Windows 11
Software Prerequisites
sudo pacman -S swtpm
Windows 11 specific changes
Secure Boot
Setting Up Secure Boot requirement for Windows 11.
<os>
<type arch="x86_64" machine="pc-q35-5.1">hvm</type>
<loader readonly="yes" type="pflash">/usr/share/OVMF/x64/OVMF_CODE.secboot.fd</loader>
<nvram template="/usr/share/OVMF/x64/OVMF_VARS.secboot.fd">/var/lib/libvirt/qemu/nvram/win11_VARS.fd</nvram>
<boot dev="hd"/>
<bootmenu enable="yes"/>
</os>TPM
Adding TPM Module to the VM (for SecureBoot and etc):
<tpm model="tpm-crb">
<backend type="emulator" version="2.0"/>
<alias name="tpm0"/>
</tpm>