[Xen-users] Intel IGD passthrough in xen 4.4

[Reinis Veips <reinis.veips@xxxxxx>]

Is it possible to passthrough Intel HD 4600 in xen 4.4? I see some success
reports using older versions of xen, but I am unable to succeed using the
latest version of xen. 

I am able to get to the point where I can install drivers for HD4600 in domU, 
and 
the graphics adapter shows up in device manager (working correctly/no 
exclamation 
marks), however, no secondary monitor shows up in "screen resolution" dialog, 
and 
there is no signal on any of the integrated video outputs.

Where can I look for extra information? Any logfiles? Should I enable logging
(how?) to see what's going on?


Details of my system:
i7-4771 (integrated HD4600 graphics adapter)
Asrock Z87 Pro4
GeForce 9800GT (being used in dom0, with nouveau drivers)

dom0 - up to date Arch Linux x64, xen 4.4.0 
(https://aur.archlinux.org/packages/xen/)

domU - Windows 7 Ultimate x64, installed without pci passthrough.

/etc/xen/grub.conf:
> XEN_HYPERVISOR_CMDLINE="dom0_mem=8192M dom0_max_vcpus=4 dom0_vcpus_pin 
> iommu=1 xsave=1"
> XEN_LINUX_CMDLINE="console=tty0 xen-pciback.hide=(00:02.0)"

00:02.0 is Display controller: Intel Corporation Xeon E3-1200 v3/4th Gen Core 
    Processor Integrated Graphics Controller (rev 06)

domU configuration:

> builder='hvm'
> memory = '4096'
> cpus="6-7"
> name = "vm0"
> vif = ['bridge=xenbr0']
> disk = ['phy:/dev/mapper/vm0,hda,w']
> device_model_version = "qemu-xen-traditional"
> boot="c"
> sdl=0
> serial='pty'
> vnc=1
> vnclisten=""
> vncpasswd=""
> on_poweroff = "destroy"
> on_reboot ="restart"
> on_crash="restart"
> usbdevice='tablet'
> pci = ['00:02.0']
> pci_power_mgmt=1
> xen_platform_pci=1
> pci_msitranslate=1
> viridian=1
> hpet=1
> acpi=1
> apic=1
> pae=1
> vga="stdvga"


Regards, Reinis

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