From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: [PATCH] KVM: Fix MOVSX emulation Date: Sun, 15 Jan 2012 11:56:52 +0200 Message-ID: <4F12A2E4.6050304@redhat.com> References: <1326566048-6756-1-git-send-email-namit@cs.technion.ac.il> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Marcelo Tosatti , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , x86@kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Nadav Amit To: Nadav Amit Return-path: Received: from mx1.redhat.com ([209.132.183.28]:39899 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751951Ab2AOJ5O (ORCPT ); Sun, 15 Jan 2012 04:57:14 -0500 In-Reply-To: <1326566048-6756-1-git-send-email-namit@cs.technion.ac.il> Sender: kvm-owner@vger.kernel.org List-ID: On 01/14/2012 08:34 PM, Nadav Amit wrote: > The destination register of MOVSX should be decoded similarily to MOVZX. > > Signed-off-by: Nadav Amit > --- > arch/x86/kvm/emulate.c | 3 ++- > 1 files changed, 2 insertions(+), 1 deletions(-) > > diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c > index 05a562b..7644a83 100644 > --- a/arch/x86/kvm/emulate.c > +++ b/arch/x86/kvm/emulate.c > @@ -3553,7 +3553,8 @@ static int decode_operand(struct x86_emulate_ctxt *ctxt, struct operand *op, > case OpReg: > decode_register_operand(ctxt, op, > op == &ctxt->dst && > - ctxt->twobyte && (ctxt->b == 0xb6 || ctxt->b == 0xb7)); > + ctxt->twobyte && ((ctxt->b & 0xfe) == 0xb6 || > + (ctxt->b & 0xfe) == 0xbe)); > break; > case OpImmUByte: > rc = decode_imm(ctxt, op, 1, false); Please post a unit test for this. See git://git.kernel.org/pub/scm/virt/kvm/kvm-unit-tests.git x86/emulate.c. -- error compiling committee.c: too many arguments to function