Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934570AbXHVWV3 (ORCPT ); Wed, 22 Aug 2007 18:21:29 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S934501AbXHVWVG (ORCPT ); Wed, 22 Aug 2007 18:21:06 -0400 Received: from 216-99-217-87.dsl.aracnet.com ([216.99.217.87]:38933 "EHLO sous-sol.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934500AbXHVWVE (ORCPT ); Wed, 22 Aug 2007 18:21:04 -0400 Date: Wed, 22 Aug 2007 15:20:36 -0700 From: Chris Wright To: James Courtier-Dutton Cc: Jeremy Fitzhardinge , Zachary Amsden , Andrew Morton , Linux Kernel Mailing List , Virtualization Mailing List , Rusty Russell , Chris Wright , Avi Kivity Subject: Re: [PATCH] Add I/O hypercalls for i386 paravirt Message-ID: <20070822222036.GD3672@sequoia.sous-sol.org> References: <46CBC842.4070100@vmware.com> <46CCB088.8070606@goop.org> <46CCB56F.8090308@superbug.co.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <46CCB56F.8090308@superbug.co.uk> User-Agent: Mutt/1.5.14 (2007-02-12) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 608 Lines: 15 * James Courtier-Dutton (James@superbug.co.uk) wrote: > If one could directly expose a device to the guest, this feature could > be extremely useful for me. > Is it possible? How would it manage to handle the DMA bus mastering? Yes it's possible (Xen supports pci pass through). Without an IOMMU (like Intel VT-d or AMD IOMMU) it's not DMA safe. thanks, -chris - 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/