From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: VT-d support for device assignment Date: Tue, 26 Aug 2008 17:38:47 +0300 Message-ID: <48B41577.4060907@qumranet.com> References: <1219740935-19701-1-git-send-email-amit.shah@qumranet.com> <48B3C8A1.6070801@qumranet.com> <200808261941.27947.amit.shah@qumranet.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org, muli@il.ibm.com, anthony@codemonkey.ws, jbarnes@virtuousgeek.org, david.woodhouse@intel.com, mark.gross@intel.com, benami@il.ibm.com, weidong.han@intel.com, allen.m.kay@intel.com To: Amit Shah Return-path: Received: from il.qumranet.com ([212.179.150.194]:35272 "EHLO il.qumranet.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753699AbYHZOis (ORCPT ); Tue, 26 Aug 2008 10:38:48 -0400 In-Reply-To: <200808261941.27947.amit.shah@qumranet.com> Sender: kvm-owner@vger.kernel.org List-ID: Amit Shah wrote: >>> -pcidevice dev=00:13.0,dma=iommu >>> >> Why not default to iommu if one is available? >> > > I've set that as default now. > > What should the parameter be to disable just the iommu? dma=noiommu looks > ugly. > dma=none ? > Or do we not want to disable an iommu at all (even for debugging or testing > something else, like pvdma)? > > Good question. Maybe it's safer to always enable it, and to let developers hack it out. We must be careful of people's feet. -- error compiling committee.c: too many arguments to function