From mboxrd@z Thu Jan 1 00:00:00 1970 From: Muli Ben-Yehuda Subject: Re: PCI passthrough = NMIs Date: Mon, 13 Oct 2008 08:35:48 +0200 Message-ID: <20081013063548.GD10147@il.ibm.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: kvm@vger.kernel.org To: Zwane Mwaikambo Return-path: Received: from mtagate8.de.ibm.com ([195.212.29.157]:44198 "EHLO mtagate8.de.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752790AbYJMGgi (ORCPT ); Mon, 13 Oct 2008 02:36:38 -0400 Received: from d12nrmr1607.megacenter.de.ibm.com (d12nrmr1607.megacenter.de.ibm.com [9.149.167.49]) by mtagate8.de.ibm.com (8.13.8/8.13.8) with ESMTP id m9D6abvM138132 for ; Mon, 13 Oct 2008 06:36:37 GMT Received: from d12av01.megacenter.de.ibm.com (d12av01.megacenter.de.ibm.com [9.149.165.212]) by d12nrmr1607.megacenter.de.ibm.com (8.13.8/8.13.8/NCO v9.1) with ESMTP id m9D6aaeJ3285144 for ; Mon, 13 Oct 2008 08:36:36 +0200 Received: from d12av01.megacenter.de.ibm.com (loopback [127.0.0.1]) by d12av01.megacenter.de.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id m9D6aaEb014207 for ; Mon, 13 Oct 2008 08:36:36 +0200 Content-Disposition: inline In-Reply-To: Sender: kvm-owner@vger.kernel.org List-ID: On Sun, Oct 12, 2008 at 11:09:14PM -0700, Zwane Mwaikambo wrote: > Hi, > I've been trying to get a Linux guest working with PCI passthrough > of an ethernet card using the vtd branches. The device detection works and > the guest reports a link, however as soon as i try and ping the guest it > receives an NMI (i'm guessing this is PCI DMA related). Interrupt delivery > to the guest looks fine (count increases at a low rate) and isn't shared > with anything else on the host. > > Thanks for any hints. Anything in the host dmesg? Are you using VT-d? Cheers, Muli -- The First Workshop on I/O Virtualization (WIOV '08) Dec 2008, San Diego, CA, http://www.usenix.org/wiov08/ <-> SYSTOR 2009---The Israeli Experimental Systems Conference http://www.haifa.il.ibm.com/conferences/systor2009/