From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael S. Tsirkin" Subject: Re: [PATCH v2] vhost: Add indirect descriptors support to the TX path Date: Sun, 25 Sep 2016 04:53:59 +0300 Message-ID: <20160925045259-mutt-send-email-mst@kernel.org> References: <1474615009-26626-1-git-send-email-maxime.coquelin@redhat.com> <20160923112416.4f798b4b@xeon-e3> <20160923213055-mutt-send-email-mst@kernel.org> <20160923132805.3207f1fa@xeon-e3> <20160925035832-mutt-send-email-mst@kernel.org> <20160924185007.19f21a7e@xeon-e3> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Maxime Coquelin , yuanhan.liu@linux.intel.com, huawei.xie@intel.com, dev@dpdk.org, vkaplans@redhat.com To: Stephen Hemminger Return-path: Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by dpdk.org (Postfix) with ESMTP id 08BB829CF for ; Sun, 25 Sep 2016 03:54:01 +0200 (CEST) Content-Disposition: inline In-Reply-To: <20160924185007.19f21a7e@xeon-e3> List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" On Sat, Sep 24, 2016 at 06:50:07PM -0700, Stephen Hemminger wrote: > On Sun, 25 Sep 2016 04:02:28 +0300 > "Michael S. Tsirkin" wrote: > > > I see. It's implied by VERSION_1 in fact. > > In other words if VERSION_1 is negotiated then bit 27 > > isn't ANY_LAYOUT, it's in fact reserved. > > > But what if guest isn't using Version 1? Legacy distro's certainly > won't have it enabled. We probably can just expose ANY_LAYOUT to guest if backend has VERSION_1.