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

[Anthony Liguori]

Gleb Natapov wrote:
> On Mon, Oct 12, 2009 at 08:44:56AM -0500, Anthony Liguori wrote:
>   
> > Gleb Natapov wrote
> >     
> > > > BTW, I don't think it's write-protected and it probably should be?
> > > >
> > > >         
> > > AFAIR it is not writable on plain qemu.
> > >       
> > KVM wants it to be writable for the TPR optimization.  Historically,
> >     
> I don't think so. TPR will work after BIOS will be shadowed. This is simply
> KVM shortcoming.
>
>   
> > it was read-only in QEMU but it changed to read-write in order to
> >     
> I just checked. It is still read-only in QEMU _before_ BIOS is shadowed.
>
>   
> > fake coreboot into thinking that the bios implemented PMM which it
> > doesn't.
> >     
> What is PMM? Post memory manager? How is it related?
>   

I was thinking of option rom memory.  BIOS memory is still read-only.

Regards,

Anthony Liguori