From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:44543) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VEnRr-0000mk-2O for qemu-devel@nongnu.org; Wed, 28 Aug 2013 17:38:51 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VEnRi-00018X-Ll for qemu-devel@nongnu.org; Wed, 28 Aug 2013 17:38:43 -0400 Received: from mail-ye0-x22a.google.com ([2607:f8b0:4002:c04::22a]:53511) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VEnRi-00018T-Go for qemu-devel@nongnu.org; Wed, 28 Aug 2013 17:38:34 -0400 Received: by mail-ye0-f170.google.com with SMTP id l11so1738061yen.15 for ; Wed, 28 Aug 2013 14:38:34 -0700 (PDT) Sender: Richard Henderson Message-ID: <521E6DD4.4000206@twiddle.net> Date: Wed, 28 Aug 2013 14:38:28 -0700 From: Richard Henderson MIME-Version: 1.0 References: <20130828080723.GD4696@stefanha-thinkpad.muc.redhat.com> <521DE2DF.70707@redhat.com> <521E6555.9010400@zytor.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] Would virtio support 64 bit address for vring virtqueue? List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Anthony Liguori Cc: Stefan Hajnoczi , "rusty@rustcorp.com.au" , "qemu-devel@nongnu.org" , Stefan Hajnoczi , "H. Peter Anvin" , "Xie, Huawei" , Laszlo Ersek On 08/28/2013 02:28 PM, Anthony Liguori wrote: > Ack. Although I wonder if there is a device out there that actually > expects 64-bit writes to a register in an PIO region... If IBM makes any custom hardware that sits off a PCI bus, that's where I'd expect to find such these days. I know DEC had 64-bit pio for some of its custom video and scsi controllers. Not that I expect we'll ever bother emulating any of that hw in qemu... r~