Re: [coreboot] KGPE-D16 PCI passthrough

On 09/08/2017 12:44 AM, Iru Cai wrote:
> On Fri, Sep 8, 2017 at 11:42 AM, [e-mail]  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.

KGPE-D16 PCI passthrough

[Iru Cai]

On Fri, Sep 8, 2017 at 2:02 PM, [e-mail]  wrote:
> On 09/08/2017 12:44 AM, Iru Cai wrote:
>
> On Fri, Sep 8, 2017 at 11:42 AM, [e-mail]  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.