You can't reinitialize the hardware, but if whatever you are trying to load is compatible with what's going on, then it should work. In a sense you could consid

You can't reinitialize the hardware, but if whatever you are trying to load is compatible with what's going on, then it should work. In a sense you could consider kexec to be like booting on a kind of weird machine where your interface to talking to the hardware is whatever macOS initialized the devices to.