From 2345df8c555ecb92c0c36172c07d5ac321a92dc7 Mon Sep 17 00:00:00 2001
From: Avi Kivity <avi@qumranet.com>
Date: Tue, 17 Apr 2007 15:30:24 +0300
Subject: [PATCH] KVM: VMX: Reduce unnecessary saving of host msrs

THe automatically switched msrs are never changed on the host (with
the exception of MSR_KERNEL_GS_BASE) and thus there is no need to save
them on every vm entry.

This reduces vmexit latency by ~400 cycles on i386 and by ~900 cycles (10%)
on x86_64.

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