Re: [Qemu-devel] Re: [PATCH 26/35] kvm: Eliminate KVMState arguments

[Anthony Liguori]

> Visible, yes, but not in live migration, or in 'info i8254', or 
> similar.  We can live migrate between qcow2 and qed (using block 
> migration), we should be able to do the same for the two i8254 
> implementations.
>
> I'm not happy about separate implementations, but that's a minor 
> details.  We can change it 2n+1 times without anybody noticing.  Not 
> so about ABI stuff.
>
> > Imagine getting a sosreport that includes a dump of the device tree.  
> > You really want to see something in there that tells you it's an 
> > in-kernel PIT and not the userspace one.
>
> Sure.  Not the device tree though.  The command line would give all 
> the information?

Then it's a one off option.  We really want as much info as possible 
stored in the device tree.

> Or 'info i8254' can say something about the implementation.  I don't 
> want to have the user say 'info i8254-kvm'.

info doesn't take a qdev device so yes, it can show whatever we want it 
to show.

Regards,

Anthony Liguori