Re: [Xen-users] VGA passthru of HD4400 graphics on intel nuc kit is not working

["Peter Gansterer" <peter.gansterer@xxxxxxxxxxxxx>]

Hi,

Last week I was trying to pass through an intel HD2500. I did some research in 
the mailing lists and finally came to the conclusion it probably just isn't 
possible at the moment.

Seems it was possible with up to Xen 4.1 with the intel IGD generations until 
then, but it broke somewhere in the switch to new qemu and xl.

Only primary graphics passthrough was possible for intel integrated graphics 
(gfx_passthru=1), regular pci_passthrough just cannot initialize it properly.

My interpretation about the state to date:

"Tiejun Chen" is working on the intel IGD support just now, trying to get it 
into Xen 4.5 in december with upstream qemu (developers realized, a more modern 
hardware architecture needs to be emulated in qemu for this to work, as well as 
new functionality to properly initialize in the domU).

He also posted a few patches for qemu-xen in May, which didn't make it to Xen 
4.4.x.

I tried to apply patches to qemu-xen (not "traditional") and came to the point 
where I could actually use the IGD for 2D (albeit with stability problems) but 
the GPU could still not be initialized.
I also tried a set of older patches for qemu-xen-traditional without success.

I finally decided to wait for december and Xen 4.5.

Please let me know if you decide to go on testing and have more success than I 
had.

regards,
- peter.

-----
Here are a few mailing-list links if you want to do your own research:

qemu-xen-traditional patches by "Rui Guo" (2013):
    http://lists.xenproject.org/archives/html/xen-devel/2013-02/msg00535.html
    (didn't work for me)

qemu-xen patch by Tiejun Chen (2014):    
    http://lists.xen.org/archives/html/xen-devel/2014-05/msg02125.html
    (worked partially without GPU - linux domU!)

Later development patches and discussion for 4.5 and qemu:
   https://lists.nongnu.org/archive/html/qemu-devel/2014-08/msg01811.html
   http://lists.xen.org/archives/html/xen-devel/2014-08/msg02416.html
   http://lists.xenproject.org/archives/html/xen-devel/2014-09/msg01462.html



On 2014-09-12 19:22:58 Alexander Pohl wrote:
> Hi,
> 
> I am trying to setup VGA passthrough of Intel HD Graphics 4400 on an Intel
> nuc kit with a core I3-4010U processor. The Intel website clearly states
> that this mainboard supports VT-x and VT-d and the bios has options for both
> [1,2]. However, all I get are blue screens and resource not available errors
> in the windows device manager.
> 
> [1] http://ark.intel.com/products/76978/Intel-NUC-Kit-D34010WYK
> [2]
> http://ark.intel.com/products/75107/Intel-Core-i3-4010U-Processor-3M-Cache-1
> _70-GHz
> 
> I use up to date Arch Linux (Linux intel-nuc 3.16.2-1-custom #1 SMP PREEMPT
> Wed Sep 10 10:18:12 CEST 2014 x86_64 GNU/Linux) as dom0 with Xen 4.4.1 and
> the xl toolstack. I want to virtualise Windows 7 Professional N edition with
> emulated standard VGA as primary adapter and HD4400 chipset graphics as
> secondary graphics passed through to domU. I am using the new xen-qemu
> device model as this is much faster on my box than xen-qemu-traditional. But
> I tried both and both don't work correctly.
> 
> lspci output:
> 00:00.0 Host bridge: Intel Corporation Haswell-ULT DRAM Controller (rev 09)
> !!! 00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT
> Integrated Graphics Controller (rev 09)
> !!! 00:03.0 Audio device: Intel Corporation Haswell-ULT HD Audio Controller
> (rev 09)
> 00:14.0 USB controller: Intel Corporation 8 Series USB xHCI HC (rev 04)
> 00:16.0 Communication controller: Intel Corporation 8 Series HECI #0 (rev
> 04)
> 00:19.0 Ethernet controller: Intel Corporation Ethernet Connection I218-V
> (rev 04)
> !!! 00:1b.0 Audio device: Intel Corporation 8 Series HD Audio Controller
> (rev 04)
> 00:1d.0 USB controller: Intel Corporation 8 Series USB EHCI #1 (rev 04)
> 00:1f.0 ISA bridge: Intel Corporation 8 Series LPC Controller (rev 04)
> 00:1f.2 SATA controller: Intel Corporation 8 Series SATA Controller 1 [AHCI
> mode] (rev 04)
> 00:1f.3 SMBus: Intel Corporation 8 Series SMBus Controller (rev 04)
> 
> The VT-d relevant xen kernel output:
> (XEN) Intel VT-d iommu 0 supported page sizes: 4kB.
> (XEN) Intel VT-d iommu 1 supported page sizes: 4kB.
> (XEN) Intel VT-d Snoop Control not enabled.
> (XEN) Intel VT-d Dom0 DMA Passthrough not enabled.
> (XEN) Intel VT-d Queued Invalidation enabled.
> (XEN) Intel VT-d Interrupt Remapping enabled.
> (XEN) Intel VT-d Shared EPT tables not enabled.
> (XEN) I/O virtualisation enabled
> 
> It looks like VT-d has been automatically enabled, although I am worried
> that Dom0 DMA Passthrough shows as not being enabled.
> 
> Here is my domU config file:
> builder = "hvm"
> name = "windows"
> uuid = "9b43be1d-3cef-4431-9e3d-f5f3c9c4bd79"
> viridian = 1
> memory = 4096
> maxmem = 4096
> vcpus = 2
> vif = [ 'mac=00:16:3e:68:e1:10,bridge=xenbr0,model=e1000' ]
> disk = [ 'file:/mnt/data/xen/domU.img,hda,w',
> 'file:/mnt/data/install/dreamspark/win7/en_windows_7_professional_n_with_sp1
> _x64_dvd_u_677207.iso,hdb:cdrom,r' ]
> sdl = 0
> vnc = 1
> vnclisten = '0.0.0.0'
> vncpasswd = 'xen'
> #device_model_version='qemu-xen-traditional'
> #boot='dc'
> acpi=1
> apic=1
> hap=1
> pae=1
> usb=1
> localtime=1
> usbdevice='tablet'
> on_poweroff = 'destroy'
> on_reboot = 'restart'
> on_crash = 'destroy'
> xen_platform_pci=1
> pci_power_mgmt=1
> pci_msitranslate=1
> #gfx_passthru=1
> pci = ['00:02.0','00:03.0','00:1b.0']
> 
> pci-back is compiled into a custom Arch linux kernel and pci resources to be
> hidden are specified with grub on kernel command line during boot. The pci
> addresses are visible with xl pci-assignable-list after booting. Here is the
> relevant grub2 config:
> XEN_HYPERVISOR_CMDLINE="dom0_mem=512M,max:512M dom0_max_vcpus=1
> dom0_vcpus_pin xsave=1"
> XEN_LINUX_CMDLINE="console=tty0
> xen-pciback.hide=(00:02.0)(00:03.0)(00:1b.0)"
> 
> I installed windows 7 into a 100 GB sparse file located on a NAS and mounted
> through NFS using the config file shown above. After first boot of DomU I
> downloaded and installed the HD graphics drivers from the Intel website [3].
> 
> [3]
> https://downloadcenter.intel.com/SearchResult.aspx?lang=&ProductID=3742&Prod
> Id=3742
> 
> The windows device manager installs the following graphics devices:
> 
> 1) Intel HD Graphics Familiy
> PCI Slot 5 (PCI bus 0, device 5, function 0)
> This device cannot find enough free resources that it can use. (Code 12)
> If you want to use this device, you will need to disable one of the other
> devices on this system.
> 
> 2) Standard VGA Graphics Adapter
> PCI Slot 3 (PCI bus 0, device 3, function 0)
> This device works properly.
> 
> 3) Other devices: PCI Device
> PCI Slot 2 (PCI bus 0, device 2, function 0)
> The drivers for this device are not installed. (Code 28)
> To find a driver for this device, click Update Driver.
> 
> My question is, why is the HD adapter at 00:05.0? Should it not be at
> 00:02.0 where the other pci device is found? Searching for drivers for the
> device at 00:02.0 does not find any. The Windows device manager also
> installs HD audio device drivers, but audio playback is distorted.
> 
> I need help how to get this setup working and how to create debug output of
> the Xen hypervisor, Dom0 and DomU in order to give more details. I
> understand that the Intel nuc kits are quite new hardware. Maybe it isn't
> possible yet?
> 
> Many thanks.
> Alexander
> 
> 
> 
> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxx
> http://lists.xen.org/xen-users
> 

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