Re: [PATCH] x86: Construct 32 bit boot time page tables in nativeformat.

[H. Peter Anvin]

Jeremy Fitzhardinge wrote:
> H. Peter Anvin wrote:
> > While we're mucking around in this area, there is another thing which 
> > we should eventually get around to fixing:
> >
> > we need a set of page tables with an identity mapping as well as the 
> > kernel mapping, for trampolining (during startup, but also during 
> > things like ACPI suspend/resume.)  Right now, we let those be the 
> > swapper page tables, but that's probably not really a good idea, since 
> > it can hide bugs.
>
> So you're suggesting a second system pagetable which has a P=V alias as 
> well as the normal kernel mapping, used only when we actually need that 
> alias?  Sounds simple enough to arrange.

I just looked at the ACPI suspend code, and it looks like it hacks its 
own identity map at runtime.  Pavel, am I reading that code right?

	-hpa
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