From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joerg Roedel Subject: Re: AMD KVM Pci Passthrough reports device busy Date: Wed, 6 Jun 2012 12:11:05 +0200 Message-ID: <20120606101105.GD757@amd.com> References: <1338867845.23475.168.camel@bling.home> <201206051039.q55AdXda002609@mail.maya.org> <1338906425.23475.186.camel@bling.home> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Cc: Andreas Hartmann , Chris Sanders , To: Alex Williamson Return-path: Received: from va3ehsobe001.messaging.microsoft.com ([216.32.180.11]:29918 "EHLO va3outboundpool.messaging.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751652Ab2FFKLM (ORCPT ); Wed, 6 Jun 2012 06:11:12 -0400 Content-Disposition: inline In-Reply-To: <1338906425.23475.186.camel@bling.home> Sender: kvm-owner@vger.kernel.org List-ID: On Tue, Jun 05, 2012 at 08:27:05AM -0600, Alex Williamson wrote: > Joerg, the question is whether the multifunction device above allows > peer-to-peer between functions that could bypass the iommu. If not, we > can make it the first entry in device specific acs enabled function I > proposed: > > https://lkml.org/lkml/2012/5/30/438 > > and it would greatly simplify assigning PCI devices on these systems > with VFIO. Thanks, Hm, good question. I will ask around and let you know what I find out. Regards, Joerg -- AMD Operating System Research Center Advanced Micro Devices GmbH Einsteinring 24 85609 Dornach General Managers: Alberto Bozzo Registration: Dornach, Landkr. Muenchen; Registerger. Muenchen, HRB Nr. 43632