From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from [140.186.70.92] (port=33247 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OY15t-0000nc-86 for qemu-devel@nongnu.org; Sun, 11 Jul 2010 14:17:38 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1OY15o-0007G3-1h for qemu-devel@nongnu.org; Sun, 11 Jul 2010 14:17:34 -0400 Received: from mx1.redhat.com ([209.132.183.28]:34666) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OY15n-0007Fx-NU for qemu-devel@nongnu.org; Sun, 11 Jul 2010 14:17:32 -0400 Message-ID: <4C3A0AB1.3070302@redhat.com> Date: Sun, 11 Jul 2010 21:17:21 +0300 From: Avi Kivity MIME-Version: 1.0 References: <20100711180910.20121.93313.stgit@localhost6.localdomain6> In-Reply-To: <20100711180910.20121.93313.stgit@localhost6.localdomain6> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Subject: [Qemu-devel] Re: [RFC PATCH 0/5] QEMU VFIO device assignment List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Alex Williamson Cc: chrisw@redhat.com, mst@redhat.com, qemu-devel@nongnu.org, kvm@vger.kernel.org, pugs@cisco.com On 07/11/2010 09:09 PM, Alex Williamson wrote: > The following series implements QEMU device assignment using the > proposed VFIO/UIOMMU kernel interfaces. See the last patch for > further vfio description. I've tested this on the v2 VFIO patch, > with a number of fixes hacked in along the way. I'll update when > Tom releases a new version of VFIO. Hopefully this will provide > some support for the usefulness of such an interfaces. Thanks, > > What's the plan for supporting this alongside the existing kvm device assignment code? vfio will only exist in very new kernels, so we have to support the old code for a while to give people chance to adjust (say 12-18 months). Ideally we'd have compatible command line syntax with qemu choosing vfio if available and falling back to kvm device assignment if not. -- I have a truly marvellous patch that fixes the bug which this signature is too narrow to contain.