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

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 12.11.13 at 15:00, Wei Liu <wei.liu2@xxxxxxxxxx> wrote:
> 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?

Maybe, maybe not. But those other BIOSes must have some
understanding of how to support >1Tb systems?

Jan


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel