Re: [coreboot] KGPE-D16 PCI passthrough

On 09/08/2017 02:12 AM, Iru Cai wrote:
> 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.

VFIO-PCI
I pass thru my video card, an onboard nic and an onboard usb controller 
(all three usb subdevices) - works great and they're all in their own 
iommu group.