Re: [Qemu-devel] Re: [PATCH 2/3] qemu: make cirrus init value pci spec compliant

[Avi Kivity]

On 10/11/2009 04:44 PM, Michael S. Tsirkin wrote:
> On Sun, Oct 11, 2009 at 04:42:27PM +0200, Avi Kivity wrote:
>    
> > On 10/11/2009 04:35 PM, Michael S. Tsirkin wrote:
> >      
> > > No, this is not how it works, I think.
> > > Currently BIOS ROM is loaded only on init, directly into qemu memory.
> > >
> > >        
> > If we change it we break in-place upgrades - install qemu, run guest,
> > upgrade qemu, reboot guest - now the old qemu runs with a new bios which
> > may or may not work.
> >      
> Sorry, could not parse this.
> If you upgraded qemu, you are running with new qemu with new bios?
>    

The guest is running during the upgrade, so the qemu executable is still 
from the old install (but deleted).

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