From patchwork Tue Mar 9 14:09:06 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gleb Natapov X-Patchwork-Id: 84304 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 o29EA5CI029447 for ; Tue, 9 Mar 2010 14:10:06 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753462Ab0CIOKE (ORCPT ); Tue, 9 Mar 2010 09:10:04 -0500 Received: from mx1.redhat.com ([209.132.183.28]:26085 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752542Ab0CIOJZ (ORCPT ); Tue, 9 Mar 2010 09:09:25 -0500 Received: from int-mx02.intmail.prod.int.phx2.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id o29E9P9m018213 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Tue, 9 Mar 2010 09:09:25 -0500 Received: from dhcp-1-237.tlv.redhat.com (dhcp-1-237.tlv.redhat.com [10.35.1.237]) by int-mx02.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id o29E9OsV031073 for ; Tue, 9 Mar 2010 09:09:24 -0500 Received: by dhcp-1-237.tlv.redhat.com (Postfix, from userid 13519) id 104B81336D4; Tue, 9 Mar 2010 16:09:23 +0200 (IST) From: Gleb Natapov To: kvm@vger.kernel.org Subject: [PATCH 08/24] KVM: x86 emulator: 0f (20|21|22|23) ignore mod bits. Date: Tue, 9 Mar 2010 16:09:06 +0200 Message-Id: <1268143762-4000-9-git-send-email-gleb@redhat.com> In-Reply-To: <1268143762-4000-1-git-send-email-gleb@redhat.com> References: <1268143762-4000-1-git-send-email-gleb@redhat.com> X-Scanned-By: MIMEDefang 2.67 on 10.5.11.12 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]); Tue, 09 Mar 2010 14:10:06 +0000 (UTC) diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 1a32b78..54e62dc 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -2516,28 +2516,20 @@ twobyte_insn: c->dst.type = OP_NONE; break; case 0x20: /* mov cr, reg */ - if (c->modrm_mod != 3) - goto cannot_emulate; c->regs[c->modrm_rm] = ops->get_cr(c->modrm_reg, ctxt->vcpu); c->dst.type = OP_NONE; /* no writeback */ break; case 0x21: /* mov from dr to reg */ - if (c->modrm_mod != 3) - goto cannot_emulate; if (emulator_get_dr(ctxt, c->modrm_reg, &c->regs[c->modrm_rm])) goto cannot_emulate; rc = X86EMUL_CONTINUE; c->dst.type = OP_NONE; /* no writeback */ break; case 0x22: /* mov reg, cr */ - if (c->modrm_mod != 3) - goto cannot_emulate; ops->set_cr(c->modrm_reg, c->modrm_val, ctxt->vcpu); c->dst.type = OP_NONE; break; case 0x23: /* mov from reg to dr */ - if (c->modrm_mod != 3) - goto cannot_emulate; if (emulator_set_dr(ctxt, c->modrm_reg, c->regs[c->modrm_rm])) goto cannot_emulate; rc = X86EMUL_CONTINUE;