Re: [Qemu-devel] [PATCH, RFC 0/5] Improve device info handling

[Gerd Hoffmann]

  Hi,

> > drives are host side state, they don't go into qdev.
>
> My idea was that boards (like pc) should be in the long run
> represented by a qdev.

The qdev root is the main_system_bus right now, I don't see a need to 
change that.  All core devices (cpus, memory, pic, ...) can be children 
of the main system bus.

> But shouldn't the drives, network and char devices be qdevs too,
> wouldn't it help the metamachine (or "pc" device)?

We have to clearly separate between host state and guest state.
qdev is about guest state.

A disk has two sides:  The host side (virtual drive foo is a lvm volume 
in raw format / a file in qcow2 format / a iso image / whatever else) 
and the guest side (this virtual drive is a master ide disk / scsi disk 
with id 3 / virtio disk / ...).  Only the later is represented by qdev. 
 The link between the two is a property.

Likewise for chardevs and network.

cheers,
  Gerd