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

Jeremy Fitzhardinge
2008-01-24T23:40:48Z

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.

J