Re: [Qemu-devel] [PATCH 05/11] qemu: MSI-X support functions

[Michael S. Tsirkin]

On Wed, Jun 10, 2009 at 04:15:04PM +0100, Paul Brook wrote:
> > > That's seems just plain wrong to me.
> > > Loading a VM shouldn't not
> > > do anything that can't happen during normal operation.
> >
> > At least wrt pci, we are very far from this state: load just overwrites
> > all registers, readonly or not, which can never happen during normal
> > operation.
> 
> IMO that code is wrong. We should only be loading things that the guest can 
> change (directly or indirectly).
> 
> Paul

Making it work this way will mean that minor changes to a device can
break backwards compatibility with old images, often in surprising ways.
What are the advantages?

-- 
MST