From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wei Huang Subject: Re: Questions about PCI passthrough on Xen 4.0 Date: Wed, 6 Apr 2011 13:44:29 -0500 Message-ID: <4D9CB48D.1040904@amd.com> References: <3FCDCB36-76C6-4A83-B7AE-66AD32C91097@gmail.com> <20110406123653.GD5009@dumpdata.com> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1"; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20110406123653.GD5009@dumpdata.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Konrad Rzeszutek Wilk Cc: Song Xiang , "xen-devel@lists.xensource.com" List-Id: xen-devel@lists.xenproject.org As indicated by Konrad, if enabling IOMMU in BIOS will cause power cycle, it would be a BIOS bug then. Your description wasn't very clear. If you saw NIC been passthru to VM, when did "power cycle" happen? Maybe you can give us more details: 1. Machine vendor, BIOS vendor/version 2. Logs (xm dmesg after passthru) Thanks, -Wei On 04/06/2011 07:36 AM, Konrad Rzeszutek Wilk wrote: > On Wed, Apr 06, 2011 at 11:36:42AM +0100, Song Xiang wrote: >> I have set up Xen 4.0.0 on an AMD machine with 2*12core. (AMD >> Opteron(tm) Processor 6168) >> >> But when I try to use PCI passthrough to pass an NIC to my HVM, the >> HVM can successfully seen the NIC, but it can not use it!!. (I have >> enable the DMA virtualization option of the AMD chip) >> >> And, the machine will announce a "Power cycle AC" error when I >> enable the "DMA virtualization" in BIOS. > Wait a minute. You enable the option in the BIOS and the machine > power cycles you? That sounds like the BIOS is busted. > >> It there anything wrong with this kind of chip? > More like your BIOS. > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel >