From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5B28BC38A24 for ; Thu, 7 May 2020 16:49:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3241B20870 for ; Thu, 7 May 2020 16:49:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="wxkYhOFw" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727092AbgEGQtV (ORCPT ); Thu, 7 May 2020 12:49:21 -0400 Received: from userp2120.oracle.com ([156.151.31.85]:55366 "EHLO userp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726222AbgEGQtU (ORCPT ); Thu, 7 May 2020 12:49:20 -0400 Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 047GltQV085445; Thu, 7 May 2020 16:48:30 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=subject : to : cc : references : from : message-id : date : mime-version : in-reply-to : content-type : content-transfer-encoding; s=corp-2020-01-29; bh=yIKBOEyYFtcnZSrQHZ63Llg0wM2ybFJLkN8J9aa02fQ=; b=wxkYhOFwU+tW8VDjRLAutcIyUVXGvkhE7c2+1dvCPlZN5RvJ4dlAqGidtOr0dN+qBuGn StTTM7ZcyEdyUYFOT7hCSQmJYi1o1yBa2saTm9yYPYtTgibk4F5We3PJOADucxPgfslk A2JpD6rTqaOnpcqniZJ62KWREzy4D3PYIZjSVwu3DJz6qt+u5ZC3SVSsZuhRIAQspsu/ jEKa7GOOJMtOIOMumvWY547joeXxL3nOadls9KIouelXL9J8APCa0uunZF39vRQZzL5k lcY3Hew8V7PNZ8KzPjdaN00WCb+Vl9WNNy1E7Tr4RDM/9/tpoJ639BOhEQtNfOe4vmAw Rw== Received: from aserp3020.oracle.com (aserp3020.oracle.com [141.146.126.70]) by userp2120.oracle.com with ESMTP id 30veckjphe-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 07 May 2020 16:48:30 +0000 Received: from pps.filterd (aserp3020.oracle.com [127.0.0.1]) by aserp3020.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 047GlWlQ044604; Thu, 7 May 2020 16:48:29 GMT Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by aserp3020.oracle.com with ESMTP id 30sjnpwf4y-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 07 May 2020 16:48:29 +0000 Received: from abhmp0006.oracle.com (abhmp0006.oracle.com [141.146.116.12]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id 047GmSiV031930; Thu, 7 May 2020 16:48:28 GMT Received: from linux-1.home (/92.157.36.49) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 07 May 2020 09:48:27 -0700 Subject: Re: [patch V4 part 3 29/29] x86/entry/32: Convert IRET exception to IDTENTRY_SW To: Thomas Gleixner , LKML Cc: x86@kernel.org, "Paul E. McKenney" , Andy Lutomirski , Frederic Weisbecker , Paolo Bonzini , Sean Christopherson , Masami Hiramatsu , Petr Mladek , Steven Rostedt , Joel Fernandes , Boris Ostrovsky , Juergen Gross , Brian Gerst , Mathieu Desnoyers , Josh Poimboeuf , Will Deacon References: <20200505134354.774943181@linutronix.de> <20200505134906.128769226@linutronix.de> From: Alexandre Chartre Message-ID: Date: Thu, 7 May 2020 18:47:17 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.6.0 MIME-Version: 1.0 In-Reply-To: <20200505134906.128769226@linutronix.de> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9614 signatures=668687 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxscore=0 adultscore=0 phishscore=0 mlxlogscore=999 bulkscore=0 malwarescore=0 spamscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2005070136 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9614 signatures=668687 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 adultscore=0 mlxscore=0 bulkscore=0 spamscore=0 malwarescore=0 impostorscore=0 clxscore=1015 lowpriorityscore=0 phishscore=0 mlxlogscore=999 suspectscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2005070136 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 5/5/20 3:44 PM, Thomas Gleixner wrote: > From: Thomas Gleixner > > Convert the IRET exception handler to IDTENTRY_SW. This is slightly > different than the conversions of hardware exceptions as the IRET exception > is invoked via an exception table when IRET faults. So it just uses the > IDTENTRY_SW mechanism for consistency. It does not emit ASM code as it does > not fit the other idtentry exceptions. > > - Implement the C entry point with DEFINE_IDTENTRY_SW() which maps to > DEFINE_IDTENTRY() > - Fixup the XEN/PV code > - Remove the old prototyoes > - Remove the RCU warning as the new entry macro ensures correctness > > No functional change. > > Signed-off-by: Thomas Gleixner > For all patches of part 3: Reviewed-by: Alexandre Chartre alex