From: Marcelo Tosatti <mtosatti@redhat.com>
Date: Wed, 11 Jun 2008 23:32:40 +0000 (-0300)
Subject: KVM: MMU: large page update_pte issue with non-PAE 32-bit guests (resend)
X-Git-Tag: v2.6.26-rc8~3^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3094538739415a9225afd2a6c78cb0fe1c1f641b;p=pandora-kernel.git

KVM: MMU: large page update_pte issue with non-PAE 32-bit guests (resend)

kvm_mmu_pte_write() does not handle 32-bit non-PAE large page backed
guests properly. It will instantiate two 2MB sptes pointing to the same
physical 2MB page when a guest large pte update is trapped.

Instead of duplicating code to handle this, disallow directory level
updates to happen through kvm_mmu_pte_write(), so the two 2MB sptes
emulating one guest 4MB pte can be correctly created by the page fault
handling path.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
---

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