From mboxrd@z Thu Jan 1 00:00:00 1970 From: Konrad Rzeszutek Wilk Subject: Re: Q on ioctl support in netfront/netback Date: Wed, 17 Feb 2010 11:40:45 -0500 Message-ID: <20100217164045.GA18387@phenom.dumpdata.com> References: <4B791671.4050902@citrix.com> <20100216181454.GD21067@phenom.dumpdata.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: ravi kerur Cc: Paul Durrant , "xen-devel@lists.xensource.com" List-Id: xen-devel@lists.xenproject.org On Wed, Feb 17, 2010 at 08:19:14AM -0800, ravi kerur wrote: > Hi Konrad, > > Using PCI passthrough(I believe it is via config file changes) prevents > other domU's accessing the NIC correct? If I use it, would the network That is correct. > transmit/receive still happen via netfront/netback drivers? If you have two NICs, where one of them is PCI passthrough and the other dedicated to the guests, then the second can serve as netback/netfront. Thought I wonder if you can have the netback in the guest. This way you could fiddle with your registers in one domain, and export a network interface (vif) to the other guests from the domain that owns the PCI device.