Running a x86_64 image in qemu machine can be as easy as:
qemu-system-x86_64 openSUSE-Leap-15.3-JeOS.x86_64-kvm-and-xen.qcow2
# A more extended example
qemu-system-x86_64 -m 1G -cpu host -enable-kvm -smp cores=2,threads=1,sockets=1 -drive file=openSUSE-Leap-15.3-JeOS.x86_64-kvm-and-xen.qcow2,if=virtio
Doing the same for aarch64 is a bit more tricky. In this tutorial we’re gonna learn how to run a aarch64 vm using qemu. This approach works on native aarch64 hardware and as emulated VM on any other architectures as well.