The rump kernel unikernel (rumprun) will happily work on actual hardware. It's a bit hazy if that's a unikernel or an embedded system in that case (and what's

The rump kernel unikernel (rumprun) will happily work on actual hardware. It's a bit hazy if that's a unikernel or an embedded system in that case (and what's the difference anyway?), but to avoid hairsplitting, you can replace the hardware with KVM and off you go.