From patchwork Sun Mar 21 11:08:21 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gleb Natapov X-Patchwork-Id: 87242 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.3/8.14.3) with ESMTP id o2LB8i70002231 for ; Sun, 21 Mar 2010 11:08:45 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753323Ab0CULIZ (ORCPT ); Sun, 21 Mar 2010 07:08:25 -0400 Received: from mx1.redhat.com ([209.132.183.28]:39256 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753312Ab0CULIX (ORCPT ); Sun, 21 Mar 2010 07:08:23 -0400 Received: from int-mx01.intmail.prod.int.phx2.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id o2LB8N52000926 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Sun, 21 Mar 2010 07:08:23 -0400 Received: from dhcp-1-237.tlv.redhat.com (dhcp-1-237.tlv.redhat.com [10.35.1.237]) by int-mx01.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id o2LB8MVN017047; Sun, 21 Mar 2010 07:08:22 -0400 Received: by dhcp-1-237.tlv.redhat.com (Postfix, from userid 13519) id A641718D451; Sun, 21 Mar 2010 13:08:21 +0200 (IST) From: Gleb Natapov To: avi@redhat.com, mtosatti@redhat.com Cc: kvm@vger.kernel.org Subject: [PATCH 2/2] KVM: x86 emulator: add decoding of CMPXCHG8B dst operand. Date: Sun, 21 Mar 2010 13:08:21 +0200 Message-Id: <1269169701-22306-2-git-send-email-gleb@redhat.com> In-Reply-To: <1269169701-22306-1-git-send-email-gleb@redhat.com> References: <1269169701-22306-1-git-send-email-gleb@redhat.com> X-Scanned-By: MIMEDefang 2.67 on 10.5.11.11 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter.kernel.org [140.211.167.41]); Sun, 21 Mar 2010 11:08:45 +0000 (UTC) diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index c1aa983..904351e 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -52,6 +52,7 @@ #define DstMem (3<<1) /* Memory operand. */ #define DstAcc (4<<1) /* Destination Accumulator */ #define DstDI (5<<1) /* Destination is in ES:(E)DI */ +#define DstMem64 (6<<1) /* 64bit memory operand */ #define DstMask (7<<1) /* Source operand type. */ #define SrcNone (0<<4) /* No source operand. */ @@ -360,7 +361,7 @@ static u32 group_table[] = { DstMem | SrcImmByte | ModRM, DstMem | SrcImmByte | ModRM | Lock, DstMem | SrcImmByte | ModRM | Lock, DstMem | SrcImmByte | ModRM | Lock, [Group9*8] = - 0, ImplicitOps | ModRM | Lock, 0, 0, 0, 0, 0, 0, + 0, DstMem64 | ModRM | Lock, 0, 0, 0, 0, 0, 0, }; static u32 group2_table[] = { @@ -1205,6 +1206,7 @@ done_prefixes: c->twobyte && (c->b == 0xb6 || c->b == 0xb7)); break; case DstMem: + case DstMem64: if ((c->d & ModRM) && c->modrm_mod == 3) { c->dst.bytes = (c->d & ByteOp) ? 1 : c->op_bytes; c->dst.type = OP_REG; @@ -1214,7 +1216,10 @@ done_prefixes: } c->dst.type = OP_MEM; c->dst.ptr = (unsigned long *)c->modrm_ea; - c->dst.bytes = (c->d & ByteOp) ? 1 : c->op_bytes; + if ((c->d & DstMask) == DstMem64) + c->dst.bytes = 8; + else + c->dst.bytes = (c->d & ByteOp) ? 1 : c->op_bytes; c->dst.val = 0; if (c->d & BitOp) { unsigned long mask = ~(c->dst.bytes * 8 - 1); @@ -1706,12 +1711,7 @@ static inline int emulate_grp9(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops) { struct decode_cache *c = &ctxt->decode; - u64 old, new; - int rc; - - rc = ops->read_emulated(c->modrm_ea, &old, 8, ctxt->vcpu); - if (rc != X86EMUL_CONTINUE) - return rc; + u64 old = c->dst.orig_val; if (((u32) (old >> 0) != (u32) c->regs[VCPU_REGS_RAX]) || ((u32) (old >> 32) != (u32) c->regs[VCPU_REGS_RDX])) { @@ -1719,15 +1719,12 @@ static inline int emulate_grp9(struct x86_emulate_ctxt *ctxt, c->regs[VCPU_REGS_RAX] = (u32) (old >> 0); c->regs[VCPU_REGS_RDX] = (u32) (old >> 32); ctxt->eflags &= ~EFLG_ZF; - } else { - new = ((u64)c->regs[VCPU_REGS_RCX] << 32) | + c->dst.val = ((u64)c->regs[VCPU_REGS_RCX] << 32) | (u32) c->regs[VCPU_REGS_RBX]; - rc = ops->cmpxchg_emulated(c->modrm_ea, &old, &new, 8, ctxt->vcpu); - if (rc != X86EMUL_CONTINUE) - return rc; ctxt->eflags |= EFLG_ZF; + c->lock_prefix = 1; } return X86EMUL_CONTINUE; } @@ -3241,7 +3238,6 @@ twobyte_insn: rc = emulate_grp9(ctxt, ops); if (rc != X86EMUL_CONTINUE) goto done; - c->dst.type = OP_NONE; break; } goto writeback;