[coreboot] KGPE-D16 PCI passthrough

[Iru Cai]

On Fri, Sep 8, 2017 at 2:02 PM, Taiidan at gmx.com <Taiidan at gmx.com> wrote:

> On 09/08/2017 12:44 AM, Iru Cai wrote:
>
> On Fri, Sep 8, 2017 at 11:42 AM, Taiidan at gmx.com <Taiidan at gmx.com> wrote:
>>
>> On 09/07/2017 11:21 PM, Iru Cai wrote:
>>>
>>> Hi,
>>>
>>>> I have a problem about PCI passthrough on KGPE-D16. I plugged in a PCI
>>>> to
>>>> USB adapter to the PCI slot, and it's in IOMMU group 7 with the ASpeed
>>>> video card and the LSI 1394a controller. I try to pass them all to a VM,
>>>> but then kernel crashes. I tried in Linux 4.9.47 and Linux 4.12.10.
>>>>
>>>> Does anyone with KGPE-D16 have this problem?
>>>>
>>>> Iru
>>>>
>>>> You are attempting to pass the primary video device to a VM which hardly
>>> ever works, I tried the same thing and it didn't work (I wanted my PCI
>>> sound card in the VM, and as PCI doesn't support ACS and all the PCI
>>> devices on the D16 are behind the same bridge they are in the same IOMMU
>>> group so I had to do that - I ended up buying a USB sound adapter)
>>>
>>> Now I'm using GTX 650 as my primary video device and not using the on
>> board
>> ASpeed  video card.
>>
>> Also I tried to pass the onboard USB controller to the VM, and also
>> crashed
>> the kernel.
>>
> Damn :[
> FYI you forgot to reply all - please re post this to the list :]
>
> Hmm can I have dmesg logs and your libvirt or w/e VM config files? for the
> new config you are trying.
> I am playing games right now with my pass thru usb ports.
>

So are you using vfio-pci or pci-stub? I don't know if I can use pci-stub
in libvirt, but vfio-pci will require all devices
in an IOMMU group passed to a VM, and I don't use a modded kernel.


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