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 21:13:54 +0800 Message-ID: <51E7EA12.1000508@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> <51E7D04E.2040700@gmail.com> "<862077afc84754329c828dfec0504ad7@mail.shatteredsilicon.net>\"" <51E7DFB5.9070607@gmail.com> <51E7E653.6090300@gmail.com> <8c90a04f78fb9b079bb5146539229b9a@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: <8c90a04f78fb9b079bb5146539229b9a@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 21:04, Gordan Bobic wrote: > On Thu, 18 Jul 2013 20:57:55 +0800, "Singapore Citizen Mr. Teo En Ming > (Zhang Enming)" wrote: >> On 18/07/2013 20:35, Gordan Bobic wrote: >>> On Thu, 18 Jul 2013 20:29:41 +0800, "Singapore Citizen Mr. Teo En >>> Ming (Zhang Enming)" wrote: >>>> On 18/07/2013 20:03, Gordan Bobic wrote: >>>>> On Thu, 18 Jul 2013 19:23:58 +0800, "Singapore Citizen Mr. Teo En >>>>> Ming (Zhang Enming)" wrote: >>>>>> 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. >>>>>>> >>>>>> >>>>>> 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. >>>>> >>>>> You are trying to get one step ahead of what I am talking about. >>>>> Forget domU for the moment. Before you can even begin thinking >>>>> about the domU you have to make sure the device is available >>>>> for assigning in dom0. If you have a driver bound to the device >>>>> in dom0 you cannot pass it through to domU. So forget domU until >>>>> you have actually confirmed there is no driver bound to the >>>>> device in dom0. >>>>> >>>>> What do the following two lines say for the device in lspci -vvv >>>>> in _dom0_ on Fedora: >>>>> Kernel driver in use: >>>>> Kernel modules: >>>>> >>>> I have attached the output of lspci -vvv in Ubuntu 13.04 dom0. The >>>> filename of the attachment is dom0-lspci.txt. >>> >>> You need to do this as root, otherwise some of the output is missing. >>> >>> And the dump from the machine where you have domU working isn't >>> useful, you need to post the same lspci dump from the system >>> where it _doesn't_ work. >>> >>> Gordan >>> >> >> I have attached the output of lspci -vvv as root in Ubuntu 13.04 >> dom0. The filename of the attachment is root-dom0-lspci.txt. > > Right, that is showing > Kernel driver in use: pciback > for the Intel VGA device. > > But that is expected, you said you have it working on Ubuntu. > You now need to make sure you have the same lspci output on > Fedora dom0 before you start the domU. > > Gordan > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xen.org > http://lists.xen.org/xen-devel > Dear Gordan, I think you are confused. I only have *one* dom0, which is the Ubuntu 13.04 dom0. I don't have any other dom0. What I am trying to do is to start Fedora 19 HVM domU in Ubuntu 13.04 dom0, but am unable to. Hope this clears everything. -- Yours sincerely, Singapore Citizen Mr. Teo En Ming (Zhang Enming)