Re: [Xen-devel] [edk2] Passing Xen memory map and resource map to OVMF

[Gerd Hoffmann <kraxel@xxxxxxxxxx>]

On Mi, 2013-11-13 at 11:58 +0000, Wei Liu wrote:
> On Wed, Nov 13, 2013 at 08:03:39AM +0100, Gerd Hoffmann wrote:
> >   Hi,
> > 
> > > > The first thing that comes in mind is to reuse E820 table for memory map
> > > > plus some extra fields for io / mmio resources. But I guess UEFI is the
> > > > new world so stuffs like E820 from old world will be less popular. Any
> > > > suggestion on existing table / data structure I can use?
> > 
> > What io/mmio ressources do you need to pass on?
> > 
> 
> MMIO holes, IO range created by hvmloader.

Why?  All (memory) address space not backed by ram effectively is mmio.
There is no need to explicitly declare holes ...

Also why io ranges?  Isn't pc io address space pretty much fixed anyway?

cheers,
  Gerd




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