From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael S. Tsirkin" Subject: Re: [PATCH 12/22] virtio_pci: allow duplicate capabilities. Date: Mon, 25 Mar 2013 08:53:01 +0200 Message-ID: <20130325065301.GA32581@redhat.com> References: <20130321162636.GF1925@redhat.com> <514B3606.2090503@zytor.com> <20130321170706.GB2994@redhat.com> <514B3EAE.8000707@zytor.com> <20130321171319.GD2994@redhat.com> <20130321174912.GA4161@redhat.com> <514B4957.1070003@zytor.com> <8738vofdyg.fsf@rustcorp.com.au> <20130324131408.GD6601@redhat.com> <514F8B0D.7000400@zytor.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <514F8B0D.7000400@zytor.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org To: "H. Peter Anvin" Cc: virtualization@lists.linux-foundation.org List-Id: virtualization@lists.linuxfoundation.org On Sun, Mar 24, 2013 at 04:23:57PM -0700, H. Peter Anvin wrote: > On 03/24/2013 06:14 AM, Michael S. Tsirkin wrote: > > > > Peter is also saying we need a way to > > do configuration/ISR without memory accesses. > > > > I'm not 100% sure what you mean with ISR here (mostly because virtio > only has a limited fraction of my attention right now.) It's a virtio register used to clear interrupts for when INTA# is used. > For configuration, are we dealing with too much data to just put it in > configuration space? > > -hpa All of it? Yes, too big: for virtio-blk it's about 64 bytes already. -- MST