Re: [Qemu-devel] Re: POST failure (loop) with isapc and seabios

[Sebastian Herbszt]

Kevin O'Connor wrote:
> On Sun, Nov 22, 2009 at 05:38:09PM +0200, Gleb Natapov wrote:
> > On Sun, Nov 22, 2009 at 04:31:24PM +0100, Sebastian Herbszt wrote:
> > >    // Write protect bios memory.
> > >    make_bios_readonly();
> > Hmmm. How is tpr patching works then? It relies on ability of a guest to
> > write into BIOS memory region. Need to retest if it actually works I
> > guess.
>
> The last time I looked, the TPR patching backend forced the "vapic"
> pages to be writable (effectively overriding the bios decision to make
> it readonly).

Does the TPR thing have to live in the optionrom/bios space or can it be moved
somewhere else like just below 4GB (some other kvm stuff is already there) ?

- Sebastian