From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from [140.186.70.92] (port=54777 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OYCfQ-0007OH-Vq for qemu-devel@nongnu.org; Mon, 12 Jul 2010 02:39:06 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1OYCWo-0007PH-QS for qemu-devel@nongnu.org; Mon, 12 Jul 2010 02:30:12 -0400 Received: from mx1.redhat.com ([209.132.183.28]:25485) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OYCWo-0007P9-JG for qemu-devel@nongnu.org; Mon, 12 Jul 2010 02:30:10 -0400 Message-ID: <4C3AB652.4000106@redhat.com> Date: Mon, 12 Jul 2010 09:29:38 +0300 From: Avi Kivity MIME-Version: 1.0 References: <20100711180910.20121.93313.stgit@localhost6.localdomain6> <4C3A0AB1.3070302@redhat.com> <1278873437.20397.29.camel@x201> <4C3A10D9.6050609@redhat.com> <1278879889.20397.143.camel@x201> In-Reply-To: <1278879889.20397.143.camel@x201> 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 11:24 PM, Alex Williamson wrote: > > One other thing to be aware of is that vfio requires devices to be > PCI-2.3 compliant in order to support DisINTx. This allows vfio to > support devices making use of shared INTx interrupts, but excludes older > devices that users maybe managed to get assigned to an exclusive > interrupt for kvm style assignment. > > I suppose we might be able to make vfio work with either pci 2.3 devices > or older devices with exclusive interrupts if that ends up affecting > many users. > PCI 2.3 is already old enough (6-7 years?) that I believe we can require it. -- I have a truly marvellous patch that fixes the bug which this signature is too narrow to contain.