From patchwork Fri Jan 6 20:11:25 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Cooper X-Patchwork-Id: 9501725 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 02E0F6021C for ; Fri, 6 Jan 2017 20:13:54 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E87D72074F for ; Fri, 6 Jan 2017 20:13:53 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id DBDF02851E; Fri, 6 Jan 2017 20:13:53 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 910B82074F for ; Fri, 6 Jan 2017 20:13:53 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cParN-000552-Fa; Fri, 06 Jan 2017 20:11:33 +0000 Received: from mail6.bemta6.messagelabs.com ([193.109.254.103]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cParM-00054w-Ah for xen-devel@lists.xen.org; Fri, 06 Jan 2017 20:11:32 +0000 Received: from [85.158.143.35] by server-11.bemta-6.messagelabs.com id A4/22-25337-3F9FF685; Fri, 06 Jan 2017 20:11:31 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrBLMWRWlGSWpSXmKPExsXitHRDpO6nn/k RBrfeiVgs+biYxYHR4+ju30wBjFGsmXlJ+RUJrBknVr9kKjjIWtF/po+9gXE/SxcjJ4eEgL/E iu5lbCA2m4C+xO4Xn5hAbBEBdYnTHRdZuxg5OJgF/CQOPfAFCQsDlX/e3MwIYrMIqEgcntLFD mLzCnhK/H68jwlipJzE+eM/mUFsIQE1iWv9l6BqBCVOznwCtpZZQELi4IsXzBMYuWchSc1Ckl rAyLSKUaM4tagstUjX2FgvqSgzPaMkNzEzR9fQwEwvN7W4ODE9NScxqVgvOT93EyMwFBiAYAf jzvWBhxglOZiURHn/v8iPEOJLyk+pzEgszogvKs1JLT7EKMPBoSTBKwQMLSHBotT01Iq0zBxg UMKkJTh4lER4eX8ApXmLCxJzizPTIVKnGHU5Drxf8ZRJiCUvPy9VSpxXHmSGAEhRRmke3AhYh FxilJUS5mUEOkqIpyC1KDezBFX+FaM4B6OSMO8HkFU8mXklcJteAR3BBHSEoCfYESWJCCmpBk atFrkl7p6qZ7TyfnxuKbjw/rasqoffX8eMmHSVAOnNJ74eTyspltXknKn4fwcrn/bcFR/Scj+ vkRUsvvY+nvvsvb5P8gEWZz0asm7fnPGOKX7H5c9PLOoPrOC95mGzYaWP8Jaz258f/Z3Po54W Zp+ovln/iP1pHynR43t1Zmzy/NwaOiGca5ISS3FGoqEWc1FxIgB1qWJ3iwIAAA== X-Env-Sender: prvs=1720a4d25=Andrew.Cooper3@citrix.com X-Msg-Ref: server-9.tower-21.messagelabs.com!1483733488!51383765!1 X-Originating-IP: [66.165.176.89] X-SpamReason: No, hits=0.0 required=7.0 tests=sa_preprocessor: VHJ1c3RlZCBJUDogNjYuMTY1LjE3Ni44OSA9PiAyMDMwMDc=\n, received_headers: No Received headers X-StarScan-Received: X-StarScan-Version: 9.1.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 42464 invoked from network); 6 Jan 2017 20:11:30 -0000 Received: from smtp.citrix.com (HELO SMTP.CITRIX.COM) (66.165.176.89) by server-9.tower-21.messagelabs.com with RC4-SHA encrypted SMTP; 6 Jan 2017 20:11:30 -0000 X-IronPort-AV: E=Sophos;i="5.33,326,1477958400"; d="scan'208";a="398392001" From: Andrew Cooper To: Xen-devel Date: Fri, 6 Jan 2017 20:11:25 +0000 Message-ID: <1483733486-25193-1-git-send-email-andrew.cooper3@citrix.com> X-Mailer: git-send-email 2.1.4 MIME-Version: 1.0 Cc: Andrew Cooper , Jan Beulich Subject: [Xen-devel] [PATCH 1/2] x86/emul: Replace opencoded extraction of IOPL from eflags X-BeenThere: xen-devel@lists.xen.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Andrew Cooper Reviewed-by: Jan Beulich --- CC: Jan Beulich --- xen/arch/x86/x86_emulate/x86_emulate.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/xen/arch/x86/x86_emulate/x86_emulate.c b/xen/arch/x86/x86_emulate/x86_emulate.c index 98ba7c5..c4ba79b 100644 --- a/xen/arch/x86/x86_emulate/x86_emulate.c +++ b/xen/arch/x86/x86_emulate/x86_emulate.c @@ -1157,7 +1157,7 @@ _mode_iopl( int cpl = get_cpl(ctxt, ops); if ( cpl == -1 ) return -1; - return (cpl <= ((ctxt->regs->_eflags >> 12) & 3)); + return cpl <= MASK_EXTR(ctxt->regs->_eflags, EFLG_IOPL); } #define mode_ring0() ({ \