From: Avi Kivity <avi@qumranet.com>
Date: Sun, 9 Dec 2007 14:37:36 +0000 (+0200)
Subject: KVM: MMU: Set nx bit correctly on shadow ptes
X-Git-Tag: v2.6.25-rc1~1138^2~50
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8d87a03aea43535a92efbb180e0ceac94d4bb5db;p=pandora-kernel.git

KVM: MMU: Set nx bit correctly on shadow ptes

While the page table walker correctly generates a guest page fault
if a guest tries to execute a non-executable page, the shadow code does
not mark it non-executable.  This means that if a guest accesses an nx
page first with a read access, then subsequent code fetch accesses will
succeed.

Fix by setting the nx bit on shadow ptes.

Signed-off-by: Avi Kivity <avi@qumranet.com>
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