Re: [PATCH 05/12] i386: During page table initialization always set the leaf page table entries.
- From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
- Date: Mon, 30 Apr 2007 09:34:14 -0700
Eric W. Biederman wrote:
If we don't set the leaf page table entries it is quite possible that
will inherit and incorrect page table entry from the initial boot
page table setup in head.S. So we need to redo the effort here,
so we pick up PSE, PGE and the like.
Hypervisors like Xen require that their page tables be read-only,
which is slightly incompatible with our low identity mappings, however
I discussed this with Jeremy he has modified the Xen early set_pte
function to avoid problems in this area.
Andi I sent this once a part of the discussion on this issue so
you may already have this patch in your queue.
Signed-off-by: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
Acked-by: Jeremy Fitzhardinge <jeremy@xxxxxxxxxxxxx>
J
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- References:
- [PATCH 0/12] Early USB debug port and i386 boot cleanups
- From: Eric W. Biederman
- [PATCH 01/12] x86_64: Allow fixmaps to be used with the initial page table.
- From: Eric W. Biederman
- [PATCH 02/12] i386 head.S: Remove unnecessary use of %ebx as the boot cpu flag
- From: Eric W. Biederman
- [PATCH 03/12] i386 head.S: Always run the full set of paging state
- From: Eric W. Biederman
- [PATCH 04/12] i386 voyager: Use modern techniques to setup and teardown low identiy mappings.
- From: Eric W. Biederman
- [PATCH 05/12] i386: During page table initialization always set the leaf page table entries.
- From: Eric W. Biederman
- [PATCH 0/12] Early USB debug port and i386 boot cleanups
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