Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751645AbdLAIuW (ORCPT ); Fri, 1 Dec 2017 03:50:22 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:33488 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751202AbdLAIuR (ORCPT ); Fri, 1 Dec 2017 03:50:17 -0500 Subject: Re: [PATCH] vfio/iommu_type1: report the IOMMU aperture info To: Jean-Philippe Brucker , "alex.williamson@redhat.com" Cc: "cohuck@redhat.com" , "borntraeger@de.ibm.com" , "zyimin@linux.vnet.ibm.com" , "pasic@linux.vnet.ibm.com" , "kvm@vger.kernel.org" , "linux-kernel@vger.kernel.org" References: <1512041678-4563-1-git-send-email-pmorel@linux.vnet.ibm.com> <1ad1aff9-1651-d1a9-cd1b-07bfd7dd0817@arm.com> <7cf3e03e-e9b4-0e27-098b-3bc391abcf96@linux.vnet.ibm.com> <76879d8a-3c5f-2fb0-c8f9-100368eafa6e@linux.vnet.ibm.com> <358f3253-6113-2d19-def7-d5d71dc78aaa@arm.com> From: Pierre Morel Date: Fri, 1 Dec 2017 09:50:11 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.4.0 MIME-Version: 1.0 In-Reply-To: <358f3253-6113-2d19-def7-d5d71dc78aaa@arm.com> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 x-cbid: 17120108-0040-0000-0000-00000414BE06 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17120108-0041-0000-0000-000020B7A8FF Message-Id: <3764d829-2e88-d100-191e-98bf8dac3bfc@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-12-01_02:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1712010108 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 444 Lines: 20 On 30/11/2017 16:23, Jean-Philippe Brucker wrote: > On 30/11/17 14:49, Pierre Morel wrote: > [...] >> Shouldn't the 52bit problem be reported by the iommu geometry? > > Yes, and most IOMMUs seem to set force_aperture. My comment was only about > default values to adopt in case a new IOMMU driver doesn't set > force_aperture to true. > > Thanks, > Jean > Yes, clear, thanks. Pierre -- Pierre Morel Linux/KVM/QEMU in B?blingen - Germany