From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751360Ab1KGFUk (ORCPT ); Mon, 7 Nov 2011 00:20:40 -0500 Received: from ozlabs.org ([203.10.76.45]:36253 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750771Ab1KGFUj (ORCPT ); Mon, 7 Nov 2011 00:20:39 -0500 From: Rusty Russell To: "Michael S. Tsirkin" , Sasha Levin Cc: linux-kernel , kvm , virtualization , Anthony Liguori Subject: Re: virtio-pci new configuration proposal In-Reply-To: <20111106213849.GA14292@redhat.com> References: <1320309203.29407.1.camel@lappy> <87lirwrzlg.fsf@rustcorp.com.au> <20111104114033.GA21308@redhat.com> <1320409939.3334.6.camel@lappy> <20111104135113.GA24452@redhat.com> <1320414804.3334.13.camel@lappy> <20111104142338.GB24452@redhat.com> <1320418385.3334.25.camel@lappy> <20111106073007.GA7146@redhat.com> <1320611097.3299.10.camel@lappy> <20111106213849.GA14292@redhat.com> User-Agent: Notmuch/0.6.1-1 (http://notmuchmail.org) Emacs/23.3.1 (i686-pc-linux-gnu) Date: Mon, 07 Nov 2011 15:46:23 +1030 Message-ID: <871utktsuw.fsf@rustcorp.com.au> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, 6 Nov 2011 23:38:49 +0200, "Michael S. Tsirkin" wrote: > On Sun, Nov 06, 2011 at 10:24:57PM +0200, Sasha Levin wrote: > > On Sun, 2011-11-06 at 09:30 +0200, Michael S. Tsirkin wrote: > > > On Fri, Nov 04, 2011 at 04:53:05PM +0200, Sasha Levin wrote: > > > > > I guess my assumption is that most options will be in use, > > > > > not discarded dead-ends. > > > > > > > > I don't know about that. 64 bit features would be pretty rare for now - > > > > and I don't think that setting the alignment will be also enabled by > > > > default. The truth is somewhere between. New features tend to be used, and importantly, they have to be offered. Anyway, the *per-device* config part will be contiguous. So we're talking about pci-specific features. So far, the only three things make sense to have in a capability list: MSI-X, the upper 32 feature bits, and the per-device config. Thanks, Rusty.