Hi Mike,
I am aware of this guide: https://github.com/GaloisInc/rustwall_vm/blob/32cd73ccb20357e1337b5420707504d6eff5c328/HOWTO_QEMU.md
It has instructions for setting up qemu to be able to run simulations that require VT-x/d features. However it requires changes to the host kernel.
Additionally, the e1000e device driver that the camkes-vm uses doesn't work when running in qemu but this shouldn't affect the minimal application.
Kind regards,
Kent