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 15:44:39 +0100 Message-ID: References: <51E6B95E.3020500@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> <4d2b5bb7cb8390d609463e74225bb155@mail.shatteredsilicon.net>" <51E7FE94.4070404@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <51E7FE94.4070404@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 22:41:24 +0800, "Singapore Citizen Mr. Teo En Ming (Zhang Enming)" wrote: > On 18/07/2013 21:55, Gordan Bobic wrote: >> 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. >> > > Do you know how to solve the problem of Fedora 19 HVM domU not > starting up in Ubuntu 13.04 dom0 with Intel IGD VGA passthrough? I never used Intel GPUs for this sort of thing. Did you try it with secondary passthrough (normal PCI device passthrough without gfx_passthru option set)?