From 110312c84b5fbd4daf5de2417fa8ab5ec883858d Mon Sep 17 00:00:00 2001
From: Avi Kivity <avi@redhat.com>
Date: Tue, 21 Dec 2010 12:54:20 +0200
Subject: [PATCH] KVM: VMX: Optimize atomic EFER load

When NX is enabled on the host but not on the guest, we use the entry/exit
msr load facility, which is slow.  Optimize it to use entry/exit efer load,
which is ~1200 cycles faster.

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