Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756442Ab0FAMo2 (ORCPT ); Tue, 1 Jun 2010 08:44:28 -0400 Received: from mx1.redhat.com ([209.132.183.28]:15073 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756310Ab0FAMoZ (ORCPT ); Tue, 1 Jun 2010 08:44:25 -0400 Message-ID: <4C050013.2020701@redhat.com> Date: Tue, 01 Jun 2010 15:41:55 +0300 From: Avi Kivity User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.9) Gecko/20100330 Fedora/3.0.4-1.fc12 Thunderbird/3.0.4 MIME-Version: 1.0 To: "Michael S. Tsirkin" CC: Tom Lyon , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, chrisw@sous-sol.org, joro@8bytes.org, hjk@linutronix.de, gregkh@suse.de, aafabbri@cisco.com, scofeldm@cisco.com Subject: Re: [PATCH] VFIO driver: Non-privileged user level PCI drivers References: <20100530124949.GI27611@redhat.com> <4C0261C1.9090204@redhat.com> <20100530130332.GM27611@redhat.com> <4C026497.8070901@redhat.com> <20100530145309.GO27611@redhat.com> <4C03A285.7060902@redhat.com> <20100531171007.GA6516@redhat.com> <4C04C085.1030107@redhat.com> <20100601095532.GA9178@redhat.com> <4C04E0E0.3070006@redhat.com> <20100601104651.GA9415@redhat.com> In-Reply-To: <20100601104651.GA9415@redhat.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 938 Lines: 26 On 06/01/2010 01:46 PM, Michael S. Tsirkin wrote: > >> Since vfio would be the only driver, there would be no duplication. But >> a separate object for the iommu mapping is a good thing. Perhaps we can >> even share it with vhost (without actually using the mmu, since vhost is >> software only). >> > Main difference is that vhost works fine with unlocked > memory, paging it in on demand. iommu needs to unmap > memory when it is swapped out or relocated. > > So you'd just take the memory map and not pin anything. This way you can reuse the memory map. But no, it doesn't handle the dirty bitmap, so no go. -- error compiling committee.c: too many arguments to function -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/