[vfio-users] Fwd: vga and subsystem

[Blank Field]

As a dirty hack i'd suggest you searching for a patch that were posted some
time ago, that enables DEV_ID spoofing. It was used to "quadrify" nvidia
GPUs. I think i've last seen this patch on the arch forums, and it's not
upstream since it was experimental.

2015-08-22 12:36 GMT+03:00 ehsan davoodi <e.davoodi at gmail.com>:

> asus n56jk
> vt-d support motherboard(bios) and cpu i7-4710HQ
> recent laptop does not have pci express card slot
> I just want to passthrough subsystem id  too of pci
>
> On Fri, Aug 21, 2015 at 6:19 PM, Bradley Davis <bradleydavisjr at gmail.com>
> wrote:
>
>> What laptop make and model is it? If it doesn't support it now, chances
>> are it wont due to a technical limitation. I was able to get PCI
>> passthrough working in a HP Elitebook of mine by passing through the
>> Express Card to the VM. I was only doing a USB express card. If you wanted
>> to do VGA, you could create yourself an express card to pcie slot with
>> powersupply. Here is an example:
>> http://www.ioi.com.tw/products/proddetail.aspx?AppID=1008&CatID=113&HostID=2043&ProdID=1130005
>>
>> There are a  number of solutions out there so do the research. All this
>> depends on if your Processor and Chipset support VT-D or IOMMU.
>>
>> On Thu, Aug 20, 2015 at 3:50 PM, ehsan davoodi <e.davoodi at gmail.com>
>> wrote:
>>
>>> oh noooooooo
>>> I cant belive.
>>> Please tell the meaning of  "no-go" is not "not supported" or "not
>>> supported yet" .:-)
>>>
>>> one of the best situation for VGA passthrough is in laptop which has two
>>> vga.
>>> I will wait and hope some one find the solution
>>> thanks
>>>
>>> On Thu, Aug 20, 2015 at 10:05 PM, Will Marler <will at wmarler.com> wrote:
>>>
>>>> I think others will chime in here, but in general, VGA passthrough is a
>>>> no-go on laptops : (.
>>>>
>>>> On Thu, Aug 20, 2015 at 9:54 AM, ehsan davoodi <e.davoodi at gmail.com>
>>>> wrote:
>>>>
>>>>>
>>>>> Dear Mr Alex Williamson AND VFIO USERS
>>>>> first sorry about my English and
>>>>> sorry for disturbing your time but I have some questions please.
>>>>> I am not computer programmer and try to solve my problem but I cant.
>>>>>
>>>>> I am using Linux in my Laptop (OpenSuse 13.2) and want to use VGA
>>>>> passthrough.
>>>>> I add some patches "ACS override patch
>>>>> <https://lkml.org/lkml/2013/5/30/513>" and "i915 VGA arbiter patch
>>>>> <https://lkml.org/lkml/2014/5/9/517>" to kernel 4.1.3 and compile it.
>>>>>
>>>>> my problem is that subsystem ID of VGA does not recognized in Linux
>>>>> and therefore when it passthrough kvm the driver of windows not installed.
>>>>> In windows(host) vga works fine and  subsystem Id is 14AD1043.
>>>>> In Linux just after boot the subsystem is correct but after running VM
>>>>> and after shutting down it the subsystem not recognized (three condition
>>>>> and outputs are in lspci-nv.txt) so in vm subsystem will be 00000000 (guest
>>>>> win.png).
>>>>> I tried to change main windows driver inf file
>>>>> nvami.inf(nvami.inf.txt) and add another gtx 850m to list with zero
>>>>> subsystem but hash error not permit driver installation.
>>>>>
>>>>> I extract VGA ROM(vga4pres) from laptop bios(n56jkas.203 in
>>>>> http://dlcdnet.asus.com/pub/ASUS/nb/N56JK/N56JKAS203.zip) and use it
>>>>> in xml but not changed.
>>>>>  other PCI like my LAN recognized subsystem in Linux and when passed
>>>>> to kvm worked fine.
>>>>> Attachments are some of my outputs and my configs.
>>>>>
>>>>> lsmod
>>>>>
>>>>> lspci -vvvv
>>>>>
>>>>> /etc/modeprobe/99-local.conf
>>>>>
>>>>> my grub:
>>>>>  resume=/dev/disk/by-uuid/a7507032-1ea2-43dc-a1aa-3d9754aedb19
>>>>> splash=silent quiet showopts nomodeset intel_iommu=on acpi_backlight=vendor
>>>>> vfio_iommu_type1.allow_unsafe_interrupts=1 i915.enable_hd_vgaarb=1
>>>>> i915.modeset=0 pci-stub.ids=10de:1391 rd.driver.pre=vfio-pci
>>>>> pcie_acs_override=downstream
>>>>>
>>>>> thanks lot
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> vfio-users mailing list
>>>>> vfio-users at redhat.com
>>>>> https://www.redhat.com/mailman/listinfo/vfio-users
>>>>>
>>>>>
>>>>
>>>
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>>>
>>>
>>
>
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