From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Singapore Citizen Mr. Teo En Ming (Zhang Enming)" Subject: Re: Cannot start Fedora 19 HVM domU with VGA passthru Date: Thu, 18 Jul 2013 19:23:58 +0800 Message-ID: <51E7D04E.2040700@gmail.com> References: <51E6B95E.3020500@gmail.com> <20130717215625.GL2924@reaktio.net> <51E7A94E.50005@gmail.com> <6d8cfa90cde86eca5915ff398872b459@mail.shatteredsilicon.net> <51E7BE5F.8000504@gmail.com> <51E7C158.5090706@gmail.com> <51E7C633.6080005@gmail.com> <6ea9f69987a517fe0b1eca8ff677ebf3@mail.shatteredsilicon.net> <51E7C9BB.6090909@gmail.com> <937f17404d3880088c5ccda6bf1d5ec6@mail.shatteredsilicon.net> Reply-To: singapore.mr.teo.en.ming@gmail.com Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <937f17404d3880088c5ccda6bf1d5ec6@mail.shatteredsilicon.net> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Gordan Bobic Cc: xen-users@lists.xen.org, "Teo En Ming (Zhang Enming)" , xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org On 18/07/2013 19:02, Gordan Bobic wrote: > On Thu, 18 Jul 2013 18:55:55 +0800, "Singapore Citizen Mr. Teo En Ming > (Zhang Enming)" wrote: >> On 18/07/2013 18:44, Gordan Bobic wrote: >>> On Thu, 18 Jul 2013 18:40:51 +0800, "Singapore Citizen Mr. Teo En >>> Ming (Zhang Enming)" wrote: >>>> On 18/07/2013 18:29, Gordan Bobic wrote: >>>>> On Thu, 18 Jul 2013 18:20:08 +0800, "Singapore Citizen Mr. Teo En >>>>> Ming (Zhang Enming)" wrote: >>>>>> On 18/07/2013 18:09, Gordan Bobic wrote: >>>>>>> On Thu, 18 Jul 2013 18:07:27 +0800, "Singapore Citizen Mr. Teo >>>>>>> En Ming (Zhang Enming)" wrote: >>>>>>>> On 18/07/2013 16:46, Gordan Bobic wrote: >>>>>>>>> On Thu, 18 Jul 2013 16:37:34 +0800, "Singapore Citizen Mr. Teo >>>>>>>>> En Ming (Zhang Enming)" >>>>>>>>> wrote: >>>>>>>>> >>>>>>>>>> Although Fedora 19 HVM domU with VGA passthrough cannot >>>>>>>>>> start, Debian >>>>>>>>>> 7.1.0 amd64 HVM domU with VGA passthrough can start. In >>>>>>>>>> Debian 7.1.0 >>>>>>>>>> amd64 HVM domU with VGA passthrough, Intel HD Graphics 4600 >>>>>>>>>> is listed >>>>>>>>>> in lspci -vvv. Please refer to lspci.txt. It is strange that >>>>>>>>>> no kernel >>>>>>>>>> module is being loaded for Intel HD Graphics 4600. There is >>>>>>>>>> no "Kernel >>>>>>>>>> driver in use" statement after VGA compatible controller: Intel >>>>>>>>>> Corporation Haswell Integrated Graphics Controller (rev 06) >>>>>>>>>> (prog-if >>>>>>>>>> 00 [VGA controller]). >>>>>>>>>> >>>>>>>>>> No kernel driver is seen in lsmod. Please refer to lsmod.txt >>>>>>>>>> >>>>>>>>>> When I tried to load the kernel module by executing "modprobe >>>>>>>>>> i915", >>>>>>>>>> it complains "no such device". >>>>>>>>>> >>>>>>>>>> ERROR: could not insert 'i915': No such device >>>>>>>>>> >>>>>>>>>> So is my Intel HD Graphics 4600 VGA Passthrough to Debian >>>>>>>>>> 7.1.0 amd64 >>>>>>>>>> HVM domU considered successful since the i915 driver cannot >>>>>>>>>> be loaded? >>>>>>>>>> >>>>>>>>>> Thank you very much. >>>>>>>>> >>>>>>>>> If you have a driver in dom0 claiming the device (other than >>>>>>>>> the xen-pciback >>>>>>>>> driver), you cannot pass through that device. If you do lspci >>>>>>>>> -ccc on F19 >>>>>>>>> and you see the driver in use for that device being something >>>>>>>>> other than >>>>>>>>> xen-pciback, that would explain why you can't pass it through. >>>>>>>>> >>>>>>>>> Also, did you first do xl pci-assignable-add for that device? >>>>>>>>> This attempts >>>>>>>>> to detach the device from it's current driver but doesn't >>>>>>>>> always work >>>>>>>>> especially for GPUs. The only solution is blacklist the driver >>>>>>>>> for the >>>>>>>>> device in dom0. The downside is that you cannot run a GUI in >>>>>>>>> dom0 on that >>>>>>>>> device. >>>>>>>> >>>>>>>> I cannot start Fedora 19 HVM domU with VGA passthrough at all. >>>>>>>> Could >>>>>>>> you advise me on the workaround? >>>>>>>> >>>>>>>> As for the Intel HD Graphics (i915) driver, I have it >>>>>>>> blacklisted in >>>>>>>> /etc/modprobe.d/blacklist.conf already. Please refer to attached >>>>>>>> blacklist.conf. >>>>>>> >>>>>>> Have you confirm that no other driver is bound to the device in >>>>>>> lspci -vvv? >>>>>>> Also what version of Xen are you running on each of the distros, >>>>>>> and which >>>>>>> dom0 kernel? >>>>>> >>>>>> I have checked "lsmod | grep i915" and the command doesn't return >>>>>> anything, which means the kernel module i915 is not loaded in dom0. >>>>> >>>>> Check lspci -vvv,find the device in the output and look for the >>>>> lines that say: >>>>> Kernel driver in use: >>>>> Kernel modules: > > [...] > >>>> I have checked lspci -vvv in Ubuntu 13.04 dom0 and the Kernel driver >>>> in use is pciback for Intel HD Graphics 4600 IGD. >>>> >>>> As for Fedora 19 HVM domU, I don't know because I cannot start it. >>> >>> Starting is not required to do this. Do it before starting the domU. >> >> Sorry, I don't understand what you're trying to say. > > On F19, don't worry about starting the domU. In dom0, do lspci -vvv, > find the Intel graphics device in the output and find what kernel > driver / module are bound to it, if any. You can only pass through > a PCI device that is connected to the xen pciback driver, and even > then often only if no other driver had connected to the device first > since that might leave it in an unknown state. > > Gordan > But I can only start Fedora 19 HVM domU with-out vga passthrough. I want to be able to start Fedora 19 HVM domU with vga passthrough. -- Yours sincerely, Singapore Citizen Mr. Teo En Ming (Zhang Enming)