Re: 2.6.25-rc1 xen pvops regression

[Jeremy Fitzhardinge]

Mark McLoughlin wrote:
> > @@ -371,6 +372,9 @@ void __init dmi_scan_machine(void)
> >  		}
> >  	}
> >  	else {
> > +		if (e820_all_mapped(0xF0000, 0xF0000+0x10000, E820_RAM))
> > +			goto out;
> >     
>
> 	One issue with using the e820 map for this is that a Xen Dom0 will also
> have this region marked as RAM in the e820 map, but will set up a fixmap
> for it, allowing dmi_scan_machine() to map the region.
>   

Would it be easier to just fake up a mapping so that window points to 
the real dmi area, and mark E820 accordingly?

   J
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