From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1MplBR-00087m-0V for qemu-devel@nongnu.org; Mon, 21 Sep 2009 11:52:09 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1MplBL-00087P-TK for qemu-devel@nongnu.org; Mon, 21 Sep 2009 11:52:07 -0400 Received: from [199.232.76.173] (port=57625 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1MplBK-00087M-Ql for qemu-devel@nongnu.org; Mon, 21 Sep 2009 11:52:02 -0400 Received: from mx1.redhat.com ([209.132.183.28]:11476) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1MplBK-0005CU-1O for qemu-devel@nongnu.org; Mon, 21 Sep 2009 11:52:02 -0400 Message-ID: <4AB7A01A.3000206@redhat.com> Date: Mon, 21 Sep 2009 11:47:38 -0400 From: john cooper MIME-Version: 1.0 References: <20090907181436.GA8538@redhat.com> <4AA60A58.4090703@redhat.com> <20090908075831.GA9875@redhat.com> <200909212039.01126.rusty@rustcorp.com.au> In-Reply-To: <200909212039.01126.rusty@rustcorp.com.au> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: [Qemu-devel] Re: [PATCH] qemu: make virtio-blk PCI compliant by default List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Rusty Russell Cc: john.cooper@redhat.com, jens.axboe@oracle.com, qemu-devel@nongnu.org, "Michael S. Tsirkin" Rusty Russell wrote: > Too late, but no big deal. We just add another feature bit for the > new method. We can have a command virtqueue for queries such as this. > > (Interestingly, this same issue broke lguest, with the 8-bit limit on > configuration space sizes). I believe the existing guest visible interface is preservable as-is without introducing any ATA specific knowledge into the driver. A trivial alternate R/O mapping for the page into the guest is all that is required. I ran out of time last week to tie this off but hopefully will do so shortly. Thanks, -john -- john.cooper@redhat.com