Hi , Thank you for this great tool , I tried latest development release in Qemu with OVMF EFI mode , and realized the CPU usage of a core is always 100 % , after turn vm off , it will be ok.

Host OS : Arch Linux
Qemu Arguments : qemu-system-x86_64 -enable-kvm -device intel-iommu -cpu host -smp 2 -machine q35 -m 4G -vga virtio -display gtk,gl=on -bios /usr/share/edk2-ovmf/x64/OVMF.fd -usb -device usb-tablet -cdrom grubfm_multiarch.iso