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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 1863FC3A59E for ; Fri, 16 Aug 2019 10:48:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EE7EC2133F for ; Fri, 16 Aug 2019 10:48:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727071AbfHPKsT (ORCPT ); Fri, 16 Aug 2019 06:48:19 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:29360 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725897AbfHPKsT (ORCPT ); Fri, 16 Aug 2019 06:48:19 -0400 Received: from pps.filterd (m0098420.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x7GAmEAm018869 for ; Fri, 16 Aug 2019 06:48:18 -0400 Received: from e06smtp03.uk.ibm.com (e06smtp03.uk.ibm.com [195.75.94.99]) by mx0b-001b2d01.pphosted.com with ESMTP id 2udtr28m92-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Fri, 16 Aug 2019 06:48:17 -0400 Received: from localhost by e06smtp03.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 16 Aug 2019 11:48:15 +0100 Received: from b06cxnps3074.portsmouth.uk.ibm.com (9.149.109.194) by e06smtp03.uk.ibm.com (192.168.101.133) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Fri, 16 Aug 2019 11:48:12 +0100 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x7GAmBEo53674058 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 16 Aug 2019 10:48:11 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 02F145204E; Fri, 16 Aug 2019 10:48:11 +0000 (GMT) Received: from in.ibm.com (unknown [9.199.62.132]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTPS id 360AC52050; Fri, 16 Aug 2019 10:48:09 +0000 (GMT) Date: Fri, 16 Aug 2019 16:18:06 +0530 From: Bharata B Rao To: Christoph Hellwig Cc: Dan Williams , Jason Gunthorpe , Andrew Morton , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org Subject: Re: add a not device managed memremap_pages v2 Reply-To: bharata@linux.ibm.com References: <20190816065434.2129-1-hch@lst.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190816065434.2129-1-hch@lst.de> User-Agent: Mutt/1.12.0 (2019-05-25) X-TM-AS-GCONF: 00 x-cbid: 19081610-0012-0000-0000-0000033F5BFD X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19081610-0013-0000-0000-00002179757D Message-Id: <20190816104806.GC8784@in.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-08-16_05:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=2 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=653 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1908160113 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Aug 16, 2019 at 08:54:30AM +0200, Christoph Hellwig wrote: > Hi Dan and Jason, > > Bharata has been working on secure page management for kvmppc guests, > and one I thing I noticed is that he had to fake up a struct device > just so that it could be passed to the devm_memremap_pages > instrastructure for device private memory. > > This series adds non-device managed versions of the > devm_request_free_mem_region and devm_memremap_pages functions for > his use case. Tested this series with my patches that add secure page management for kvmppc guests. These patches along with migrate_vma-cleanup series are good-to-have to support secure guests on ultravisor enabled POWER platforms. Regards, Bharata.