From ee122a7109e42313caadf6038ab773d1f68fcce1 Mon Sep 17 00:00:00 2001
From: Nadav Amit <namit@cs.technion.ac.il>
Date: Tue, 28 Apr 2015 13:06:00 +0300
Subject: [PATCH] KVM: x86: Fix update RCX/RDI/RSI on REP-string

When REP-string instruction is preceded with an address-size prefix,
ECX/EDI/ESI are used as the operation counter and pointers.  When they are
updated, the high 32-bits of RCX/RDI/RSI are cleared, similarly to the way they
are updated on every 32-bit register operation.  Fix it.

Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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