From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932285AbcECFeV (ORCPT ); Tue, 3 May 2016 01:34:21 -0400 Received: from mga04.intel.com ([192.55.52.120]:60068 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750735AbcECFeS convert rfc822-to-8bit (ORCPT ); Tue, 3 May 2016 01:34:18 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.24,571,1455004800"; d="scan'208";a="797458262" From: "Tian, Kevin" To: Yongji Xie , "kvm@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-pci@vger.kernel.org" , "linuxppc-dev@lists.ozlabs.org" , "iommu@lists.linux-foundation.org" CC: "alex.williamson@redhat.com" , "bhelgaas@google.com" , "aik@ozlabs.ru" , "benh@kernel.crashing.org" , "paulus@samba.org" , "mpe@ellerman.id.au" , "joro@8bytes.org" , "warrier@linux.vnet.ibm.com" , "zhong@linux.vnet.ibm.com" , "nikunj@linux.vnet.ibm.com" , "eric.auger@linaro.org" , "will.deacon@arm.com" , "gwshan@linux.vnet.ibm.com" , "David.Laight@ACULAB.COM" , "alistair@popple.id.au" , "ruscur@russell.cc" Subject: RE: [PATCH 5/5] vfio-pci: Allow to mmap MSI-X table if interrupt remapping is supported Thread-Topic: [PATCH 5/5] vfio-pci: Allow to mmap MSI-X table if interrupt remapping is supported Thread-Index: AQHRoIMDw+bjSjW8wkusiJ7fWPCsmJ+muJEA Date: Tue, 3 May 2016 05:34:14 +0000 Message-ID: References: <1461761010-5452-1-git-send-email-xyjxie@linux.vnet.ibm.com> <1461761010-5452-6-git-send-email-xyjxie@linux.vnet.ibm.com> In-Reply-To: <1461761010-5452-6-git-send-email-xyjxie@linux.vnet.ibm.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ctpclassification: CTP_IC x-titus-metadata-40: eyJDYXRlZ29yeUxhYmVscyI6IiIsIk1ldGFkYXRhIjp7Im5zIjoiaHR0cDpcL1wvd3d3LnRpdHVzLmNvbVwvbnNcL0ludGVsMyIsImlkIjoiYWY1MDcwOTAtZThlNy00ZTdmLTgwOWQtZjY2MzZiZjQyM2QwIiwicHJvcHMiOlt7Im4iOiJDVFBDbGFzc2lmaWNhdGlvbiIsInZhbHMiOlt7InZhbHVlIjoiQ1RQX0lDIn1dfV19LCJTdWJqZWN0TGFiZWxzIjpbXSwiVE1DVmVyc2lvbiI6IjE1LjkuNi42IiwiVHJ1c3RlZExhYmVsSGFzaCI6ImpDTjVGQkxkT2JwVlJCcEdnZmhqQjQxZVdJNXh4b1wvSnN1QWN2XC9qcDJOVT0ifQ== x-originating-ip: [10.239.127.40] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > From: Yongji Xie > Sent: Wednesday, April 27, 2016 8:43 PM > > This patch enables mmapping MSI-X tables if hardware supports > interrupt remapping which can ensure that a given pci device > can only shoot the MSIs assigned for it. > > With MSI-X table mmapped, we also need to expose the > read/write interface which will be used to access MSI-X table. > > Signed-off-by: Yongji Xie A curious question here. Does "allow to mmap MSI-X" essentially mean that KVM guest can directly read/write physical MSI-X structure then? Thanks Kevin