Re: [Xen-devel] [PATCH] hvmloader: write extra memory in CMOS

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Tue, Nov 12, 2013 at 01:56:02PM +0000, Jan Beulich wrote:
> >>> On 12.11.13 at 14:39, Wei Liu <wei.liu2@xxxxxxxxxx> 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@xxxxxxxxxx> 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

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