AxVM: resource management within each VM

WIP 🚧

• address space of guest VM
• axvcpu list
• axdevice list

#![allow(unused)]
fn main() {
/// A Virtual Machine.
pub struct AxVM<H: AxVMHal, U: AxVCpuHal> {
    running: AtomicBool,
    inner_const: AxVMInnerConst<U>,
    inner_mut: AxVMInnerMut<H>,
}

struct AxVMInnerConst<U: AxVCpuHal> {
    id: usize,
    config: AxVMConfig,
    vcpu_list: Box<[AxVCpuRef<U>]>,
    devices: AxVmDevices,
}

struct AxVMInnerMut<H: AxVMHal> {
    // Todo: use more efficient lock.
    address_space: Mutex<AddrSpace<H::PagingHandler>>,
    _marker: core::marker::PhantomData<H>,
}
}