From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Fjellstrom Subject: Re: Status of pci passthrough work? Date: Sat, 27 Sep 2008 01:57:46 -0600 Message-ID: <200809270157.47022.tfjellstrom@shaw.ca> References: <200809262020.16885.tfjellstrom@shaw.ca> <200809270112.19843.tfjellstrom@shaw.ca> <0122C7C995D32147B66BF4F440D3016301CA86BF@pdsmsx415.ccr.corp.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit To: kvm@vger.kernel.org Return-path: Received: from idcmail-mo1so.shaw.ca ([24.71.223.10]:54179 "EHLO idcmail-mo1so.shaw.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751323AbYI0H5s (ORCPT ); Sat, 27 Sep 2008 03:57:48 -0400 In-Reply-To: <0122C7C995D32147B66BF4F440D3016301CA86BF@pdsmsx415.ccr.corp.intel.com> Content-Disposition: inline Sender: kvm-owner@vger.kernel.org List-ID: On Saturday 27 September 2008, Han, Weidong wrote: > Thomas Fjellstrom wrote: > > On Saturday 27 September 2008, Han, Weidong wrote: > >> Hi Thomas, > >> > >> the patches of passthrough/VT-d on kvm.git are already checked in. > >> With Amit's userspace patches, you can assign device to guest. You > >> can have a try. > > > > Does that mean I need VT-d support in hardware? All I have to test > > with right now is an AMD Phenom X4 with a 780g+sb700 system. Don't > > think it has an iommu, and I'd find it odd if the intel VT-d code > > "just worked" on amd's hardware. > > Yes, currently you need VT-d support in hardware to assign device. So I take it the PV-DMA (or pv-dma doesn't do what I think it does...) or the other 1:1 device pass through work isn't working right now? It's something I'd really like to use, but I don't have access to a platform with a hardware iommu. Though I might be able to pick up a replacement board for my new server with the SB750 southbridge which supposedly has AMD's new iommu hardware in it, but I haven't seen any evidence that kvm or linux supports it. > Randy (Weidong) > > >> Randy (Weidong) > >> > >> Thomas Fjellstrom wrote: > >>> I'm very interested in being able to pass a few devices through to > >>> kvm guests. I'm wondering what exactly is working now, and how I > >>> can start testing it? > >>> > >>> the latest kvm release doesn't seem to include any support for it in > >>> userspace, so I can't test it with that... > >>> > >>> Basically what I want to do is assign a two or three physical nics > >>> (100mb and GiB) to one vm, some tv tuner cards to another. > >>> > >>> Also, I'm wondering if AMD's iommu in the SB750 southbridge is > >>> supported yet? Or if anyone is working on it? > >>> > >>> -- > >>> Thomas Fjellstrom > >>> tfjellstrom@shaw.ca > >> > >> -- > >> To unsubscribe from this list: send the line "unsubscribe kvm" in > >> the body of a message to majordomo@vger.kernel.org > >> More majordomo info at http://vger.kernel.org/majordomo-info.html > > > > -- > > Thomas Fjellstrom > > tfjellstrom@shaw.ca -- Thomas Fjellstrom tfjellstrom@shaw.ca