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=-3.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS 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 5EBB2C43613 for ; Fri, 21 Jun 2019 16:19:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3D1FA2089E for ; Fri, 21 Jun 2019 16:19:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726505AbfFUQTq (ORCPT ); Fri, 21 Jun 2019 12:19:46 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:6408 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726017AbfFUQTp (ORCPT ); Fri, 21 Jun 2019 12:19:45 -0400 Received: from pps.filterd (m0098393.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x5LGCti1030581 for ; Fri, 21 Jun 2019 12:19:44 -0400 Received: from e06smtp05.uk.ibm.com (e06smtp05.uk.ibm.com [195.75.94.101]) by mx0a-001b2d01.pphosted.com with ESMTP id 2t92bxgw3q-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Fri, 21 Jun 2019 12:19:44 -0400 Received: from localhost by e06smtp05.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Fri, 21 Jun 2019 17:19:39 +0100 Received: from d06av25.portsmouth.uk.ibm.com (d06av25.portsmouth.uk.ibm.com [9.149.105.61]) by b06avi18878370.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x5LGJbw738601180 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 21 Jun 2019 16:19:37 GMT Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id CD98011C05C; Fri, 21 Jun 2019 16:19:37 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3894811C054; Fri, 21 Jun 2019 16:19:37 +0000 (GMT) Received: from sig-9-145-18-245.uk.ibm.com (unknown [9.145.18.245]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Fri, 21 Jun 2019 16:19:37 +0000 (GMT) Date: Fri, 21 Jun 2019 18:19:36 +0200 (CEST) From: Sebastian Ott X-X-Sender: sebott@schleppi To: Cornelia Huck cc: Peter Oberparleiter , Halil Pasic , Alex Williamson , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] s390/cio: introduce driver_override on the css bus In-Reply-To: <20190613110815.17251-1-cohuck@redhat.com> References: <20190613110815.17251-1-cohuck@redhat.com> User-Agent: Alpine 2.21 (LFD 202 2017-01-01) Organization: =?ISO-8859-15?Q?=22IBM_Deutschland_Research_&_Development_GmbH?= =?ISO-8859-15?Q?_=2F_Vorsitzende_des_Aufsichtsrats=3A_Matthias?= =?ISO-8859-15?Q?_Hartmann_Gesch=E4ftsf=FChrung=3A_Dirk_Wittkopp?= =?ISO-8859-15?Q?_Sitz_der_Gesellschaft=3A_B=F6blingen_=2F_Reg?= =?ISO-8859-15?Q?istergericht=3A_Amtsgericht_Stuttgart=2C_HRB_2432?= =?ISO-8859-15?Q?94=22?= MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-TM-AS-GCONF: 00 x-cbid: 19062116-0020-0000-0000-0000034C3EC4 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19062116-0021-0000-0000-0000219FA048 Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-06-21_11:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=3 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=871 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1906210131 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 13 Jun 2019, Cornelia Huck wrote: > Sometimes, we want to control which of the matching drivers > binds to a subchannel device (e.g. for subchannels we want to > handle via vfio-ccw). > > For pci devices, a mechanism to do so has been introduced in > 782a985d7af2 ("PCI: Introduce new device binding path using > pci_dev.driver_override"). It makes sense to introduce the > driver_override attribute for subchannel devices as well, so > that we can easily extend the 'driverctl' tool (which makes > use of the driver_override attribute for pci). > > Note that unlike pci we still require a driver override to > match the subchannel type; matching more than one subchannel > type is probably not useful anyway. > > Signed-off-by: Cornelia Huck Reviewed-by: Sebastian Ott Should I take that via our git tree or do you have other patches depending on this one?