From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gordan Bobic Subject: Re: Cannot start Fedora 19 HVM domU with VGA passthru Date: Thu, 18 Jul 2013 14:55:06 +0100 Message-ID: <4d2b5bb7cb8390d609463e74225bb155@mail.shatteredsilicon.net> 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>" <51E7EA12.1000508@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <51E7EA12.1000508@gmail.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: singapore.mr.teo.en.ming@gmail.com Cc: xen-users@lists.xen.org, xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org On Thu, 18 Jul 2013 21:13:54 +0800, "Singapore Citizen Mr. Teo En Ming (Zhang Enming)" wrote: > 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. >>>> >>> >>> 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. >> > 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. It does, thanks. I was under the impression you were dual booting dom0s and one was letting you boot domU and the other wasn't. Apologies. Gordan