[vfio-users] VFIO PCI passthrough problems booting VM

[Blank Field]

That limitation has it's reasons and exists in systems like virtualbox or
hyper-v.
But afaik, if you have two devices in one group, and they both are bound to
vfio-pci, you can attach them to different VMs.
On Sep 18, 2015 10:32 AM, "Phill Edwards" <philledwards at gmail.com> wrote:

> Thanks for this info. When you say "*give up* use of the NICs at 05:00.x
>>> by binding them to either pci-stub or vfio-pci" does that mean that the
>>> NICs won't work any more?
>>>
>>
>> It means you can't use the NIC in the host, IOMMU groups cannot be split
>> between host and guest.  You can use them in the guest or just sequester
>> them with pci-stub.
>>
>>
>>> If they will still work and it will allow me to have the DVB-T card in
>>> an IOMMU group of it's own that sounds like a good solution. Does it matter
>>> whether I bind them to pci-stub or vfio-pci - are there implications to
>>> binding to one rather than the other?
>>>
>>
>> Using vfio-pci means that you can expose the device to the guest (or
>> not), using pci-stub prevents exposing the device to the guest.
>>
>>
>>> Also, do I achieve the binding by adding something like this to
>>> GRUB_CMDLINE_LINUX?
>>> pci-stub.ids=0e11:00db
>>>
>>
>> These are subsystem vendor and device ID, you need 8086:1010.  You can
>> also just dynamically unbind these from the host driver with virsh
>> nodedev-detach.
>>
>
> Thanks Alex. It's sounding like that I'm just not going to get this
> working as I need to. One of the PCI devices is a dual NIC which is to be
> used by VM1 and the other is a DVB-T card which is to be used in VM2. If
> I'm understanding things here, that's not going to be possible, is it? If
> that's the case I think I'll have to find an different hypervisor to use as
> host. ESXi can do this but I didn't really want to stick with VMware.
>
> I was thinking of Proxmox but that's based on KVM so I'm guessing that's
> going to have the same problem, isn't it?
>
>
>
> _______________________________________________
> vfio-users mailing list
> vfio-users at redhat.com
> https://www.redhat.com/mailman/listinfo/vfio-users
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listman.redhat.com/archives/vfio-users/attachments/20150918/3d093b40/attachment.htm>