Re: [PATCH] hvmloader: write extra memory in CMOS

Wei Liu
Tue, 12 Nov 2013 14:00:25 -0000

On Tue, Nov 12, 2013 at 01:56:02PM +0000, Jan Beulich
wrote:
> >>> On 12.11.13 at 14:39, Wei Liu <wei.liu2@citrix.com>
wrote:
> > On Tue, Nov 12, 2013 at 01:21:36PM +0000, Jan Beulich wrote:
> >> >>> On 12.11.13 at 13:37, Wei Liu
<wei.liu2@citrix.com> wrote:
> >> > However in some CMOS maps I found those bytes are marked as
reserved.
> >>
> >> Exactly. The question is whether some _other_ BIOSes then use
> >> these register for other purposes...
> >>
> >
> > So I think now the solution is to make this code OVMF only, are you
fine
> > with this?
>
> Yes, provided you widen the location to at least 4 bytes.
>

I''m afraid I cannot widen the location (not for technical reason).
It''s
a conventional protocol used by these non traditional BIOSes. It
doesn''t
make sense to change Xen only, right?

Wei.

> Jan