Re: [Qemu-devel] [PATCH v5 06/16] apic: Introduce backend/frontend infrastructure for KVM reuse

[Paolo Bonzini]

On 12/20/2011 02:54 PM, Anthony Liguori wrote:
In QOM parlance Jan implemented this:
abstract class Object
    abstract class Device
        class APIC: { backend: link<APICBackend> }
    abstract class APICBackend
        class QEMU_APICBackend
        class KVM_APICBackend

I don't fundamentally object to modeling it like this provided that it's
modeled (and visible) through qdev and not done through a one-off
infrastructure.

There is no superclass of DeviceState, hence doing it through qdev would 
mean introducing a new bus type and so on.  This would be a superb 
example of a useless bus that can disappear with QOM, but I don't see 
why we should take the pain to add it in the first place. :)

We sure can revisit this when the subclassing and interface 
infrastructures of QOM are merged.

Paolo