From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wei Yongjun Subject: [PATCH 2/2 v2] KVM: x86 emulator: add XADD instruction emulation Date: Fri, 13 Aug 2010 13:13:21 +0800 Message-ID: <4C64D471.2090905@cn.fujitsu.com> References: <4C63F947.7020808@cn.fujitsu.com> <4C63FA04.3030403@cn.fujitsu.com> <4C64148D.4080103@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=GB2312 Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org To: Paolo Bonzini , Avi Kivity Return-path: Received: from cn.fujitsu.com ([222.73.24.84]:52313 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1751640Ab0HMFQA (ORCPT ); Fri, 13 Aug 2010 01:16:00 -0400 In-Reply-To: <4C64148D.4080103@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: Add XADD instruction emulation (opcode 0x0f 0xc0~0xc1) Signed-off-by: Wei Yongjun --- v1 -> v2: remove implicit LOCK prefix --- arch/x86/kvm/emulate.c | 7 ++++++- 1 files changed, 6 insertions(+), 1 deletions(-) diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 8bf80a9..279547a 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -2387,7 +2387,8 @@ static struct opcode twobyte_table[256] = { D(DstReg | SrcMem | ModRM), D(DstReg | SrcMem | ModRM), D(ByteOp | DstReg | SrcMem | ModRM | Mov), D(DstReg | SrcMem16 | ModRM | Mov), /* 0xC0 - 0xCF */ - N, N, N, D(DstMem | SrcReg | ModRM | Mov), + D(ByteOp | DstMem | SrcReg | ModRM), D(DstMem | SrcReg | ModRM), + N, D(DstMem | SrcReg | ModRM | Mov), N, N, N, GD(0, &group9), N, N, N, N, N, N, N, N, /* 0xD0 - 0xDF */ @@ -3532,6 +3533,10 @@ twobyte_insn: c->dst.val = (c->d & ByteOp) ? (s8) c->src.val : (s16) c->src.val; break; + case 0xc0 ... 0xc1: /* xadd */ + /* Write back the register source. */ + write_register_operand(&c->src, c->dst.val, c->dst.bytes); + goto add; case 0xc3: /* movnti */ c->dst.bytes = c->op_bytes; c->dst.val = (c->op_bytes == 4) ? (u32) c->src.val : -- 1.7.0.4