From patchwork Thu Mar 28 17:03:45 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jan Beulich X-Patchwork-Id: 10875421 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BCE7E13B5 for ; Thu, 28 Mar 2019 17:06:01 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9FB5528AA1 for ; Thu, 28 Mar 2019 17:06:01 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 91F8328DA0; Thu, 28 Mar 2019 17:06:01 +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=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, 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 AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 7BFAE28AA1 for ; Thu, 28 Mar 2019 17:05:57 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1h9YRR-00060T-1g; Thu, 28 Mar 2019 17:03:49 +0000 Received: from all-amaz-eas1.inumbo.com ([34.197.232.57] helo=us1-amaz-eas2.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1h9YRQ-00060O-Aq for xen-devel@lists.xenproject.org; Thu, 28 Mar 2019 17:03:48 +0000 X-Inumbo-ID: 72512c80-517b-11e9-988f-df30e84eaf52 Received: from prv1-mh.provo.novell.com (unknown [137.65.248.33]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id 72512c80-517b-11e9-988f-df30e84eaf52; Thu, 28 Mar 2019 17:03:45 +0000 (UTC) Received: from INET-PRV1-MTA by prv1-mh.provo.novell.com with Novell_GroupWise; Thu, 28 Mar 2019 11:03:44 -0600 Message-Id: <5C9CFE7102000078002229A1@prv1-mh.provo.novell.com> X-Mailer: Novell GroupWise Internet Agent 18.1.0 Date: Thu, 28 Mar 2019 11:03:45 -0600 From: "Jan Beulich" To: "xen-devel" Mime-Version: 1.0 Content-Disposition: inline Subject: [Xen-devel] [PATCH] x86emul: don't read mask register on AVX512F-incapable platforms X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: George Dunlap , Andrew Cooper , Wei Liu , Juergen Gross , Roger Pau Monne Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" X-Virus-Scanned: ClamAV using ClamSMTP Reported-by: George Dunlap Signed-off-by: Jan Beulich Tested-by: George Dunlap --- This is surely a stable tree candidate, unless it could still make it into 4.12 before the release. --- a/xen/arch/x86/x86_emulate/x86_emulate.c +++ b/xen/arch/x86/x86_emulate/x86_emulate.c @@ -3511,7 +3511,7 @@ x86_emulate( } /* With a memory operand, fetch the mask register in use (if any). */ - if ( ea.type == OP_MEM && evex.opmsk ) + if ( ea.type == OP_MEM && cpu_has_avx512f && evex.opmsk ) { uint8_t *stb = get_stub(stub);