From: Joerg Roedel <joerg.roedel@amd.com>
Date: Thu, 2 Sep 2010 15:29:45 +0000 (+0200)
Subject: KVM: MMU: Fix 32 bit legacy paging with NPT
X-Git-Tag: v2.6.37-rc1~142^2~75
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f87f928882d080eaec8b0d76aecff003d664697d;p=pandora-kernel.git

KVM: MMU: Fix 32 bit legacy paging with NPT

This patch fixes 32 bit legacy paging with NPT enabled. The
mmu_check_root call on the top-level of the loop causes
root_gfn to take values (in the tdp_enabled path) which are
outside of guest memory. So the mmu_check_root call fails at
some point in the loop interation causing the guest to
tiple-fault.
This patch changes the mmu_check_root calls to the places
where they are really necessary. As a side-effect it
introduces a check for the root of a pae page table too.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
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