Uhyve Hypervisor Interface

The Uhyve hypercall interface works as follows:

• On x86_64 you use an out port instruction. The address of the out-port corresponds to the hypercall you want to use. You can obtain it from the [IoPorts] enum. The data send to that port is the physical memory address (of the VM) of the parameters of that hypercall.
• On aarch64 you write to the respective [HypercallAddress]. The 64-bit value written to that location is the guest's physical memory address of the hypercall's parameter.