From mboxrd@z Thu Jan 1 00:00:00 1970 From: Neil Turton Subject: Re: MSI and VT-d interrupt remapping Date: Wed, 02 Apr 2008 15:47:35 +0100 Message-ID: <47F39C87.2040801@solarflare.com> References: <18384.23842.229533.91264@gargle.gargle.HOWL> <18385.24520.251144.711784@gargle.gargle.HOWL> <391BF3CDD2DC0848B40ACB72FA97AD59031A7567@pdsmsx413.ccr.corp.intel.com> <18408.65003.87218.946381@gargle.gargle.HOWL> <391BF3CDD2DC0848B40ACB72FA97AD59031A7A2B@pdsmsx413.ccr.corp.intel.com> <18409.10884.505767.967619@gargle.gargle.HOWL> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <18409.10884.505767.967619@gargle.gargle.HOWL> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Espen Skoglund Cc: "Jiang, Yunhong" , "Shan, Haitao" , xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org Espen Skoglund wrote: > I must confess that I do not know of any device that currently use > this feature (perhaps Solarflare or NetXen devices have support for > it), and the whole connection with VT-d interreupt remapping is as of > now purely academic anyway due to the lack of chipsets with the > apropriate feature. Solarflare would be interested in the ability to pass MSI-X interrupts through to different guests for our netfront/netback accelerator plugins. Our latest chips support MSI-X with multiple queues so they do not need to use multi-message MSIs. I don't know enough about VT-d interrupt remapping to comment on that. Cheers, Neil.