From b79b93f92cb3b66b89d75525fdfd2454b1e1f446 Mon Sep 17 00:00:00 2001
From: Avi Kivity <avi@redhat.com>
Date: Sun, 6 Jun 2010 15:46:44 +0300
Subject: [PATCH] KVM: MMU: Don't drop accessed bit while updating an spte

__set_spte() will happily replace an spte with the accessed bit set with
one that has the accessed bit clear.  Add a helper update_spte() which checks
for this condition and updates the page flag if needed.

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