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Date: Thu, 28 May 2015 15:24:18 +0200
From: "Michael S. Tsirkin" <mst@redhat.com>
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Subject: Re: [Qemu-devel] [PATCH V15 4/5] i386: add a Virtual Machine
	Generation ID device
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To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Gal Hammer <ghammer@redhat.com>, imammedo@redhat.com, qemu-devel@nongnu.org

On Thu, May 28, 2015 at 03:00:52PM +0200, Paolo Bonzini wrote:
> 
> 
> On 28/05/2015 14:21, Michael S. Tsirkin wrote:
> > > And the way I can fix it would be...? Is there another memory region I can
> > > use?
> > > 
> > > Thanks,
> > > 
> > >     Gal.
> > 
> > I think we hammered out an interesting alternative off-list: get hold of
> > some AddressRegionNVS memory and copy data from MMIO or port io over
> > there when you get an interrupt.
> 
> That doesn't work because there's no way to get the base address of a
> DataTableRegion.
> 
> You could use a linker ADD_POINTER command, but it wouldn't work for
> UEFI.

Hmm why not? UEFI runs these as well.

>  So I think it's best to just stay with this one.  If we do find
> something better we can always change it later.
> 
> Paolo