Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752838AbYLAPqg (ORCPT ); Mon, 1 Dec 2008 10:46:36 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751774AbYLAPq0 (ORCPT ); Mon, 1 Dec 2008 10:46:26 -0500 Received: from outbound-va3.frontbridge.com ([216.32.180.16]:51351 "EHLO VA3EHSOBE005.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751487AbYLAPq0 (ORCPT ); Mon, 1 Dec 2008 10:46:26 -0500 X-BigFish: VPS-38(ze80iz1432R98dR1805M179dR936fOzzzzz32i6bh43j63h) X-Spam-TCS-SCL: 2:0 X-WSS-ID: 0KB7FSP-03-PSK-01 Date: Mon, 1 Dec 2008 16:46:03 +0100 From: Joerg Roedel To: Avi Kivity CC: Joerg Roedel , kvm@vger.kernel.org, weidong.han@intel.com, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, mingo@redhat.com, amit.shah@redhat.com Subject: Re: [PATCH 3/9] add frontend implementation for the IOMMU API Message-ID: <20081201154603.GB12816@amd.com> References: <20081201173830B.fujita.tomonori@lab.ntt.co.jp> <20081201120026.GF17719@amd.com> <20081201130209.GA21615@il.ibm.com> <20081201231852P.fujita.tomonori@lab.ntt.co.jp> <20081201142727.GL29705@8bytes.org> <4933F5A7.8020408@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <4933F5A7.8020408@redhat.com> User-Agent: mutt-ng/devel-r804 (Linux) X-OriginalArrivalTime: 01 Dec 2008 15:46:03.0341 (UTC) FILETIME=[EA6F77D0:01C953CB] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1150 Lines: 29 On Mon, Dec 01, 2008 at 04:33:11PM +0200, Avi Kivity wrote: > Joerg Roedel wrote: > > Hmm, is there any hardware IOMMU with which we can't emulate domains by > > partitioning the IO address space? This concept works for GART and > > Calgary. > > > > > > Is partitioning secure? Domain X's user could program its hardware to > dma to domain Y's addresses, zapping away Domain Y's user's memory. No its not secure. But this problem exists with pv-dma without iommu too. Joerg -- | AMD Saxony Limited Liability Company & Co. KG Operating | Wilschdorfer Landstr. 101, 01109 Dresden, Germany System | Register Court Dresden: HRA 4896 Research | General Partner authorized to represent: Center | AMD Saxony LLC (Wilmington, Delaware, US) | General Manager of AMD Saxony LLC: Dr. Hans-R. Deppe, Thomas McCoy -- 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/