[vfio-users] Processor Root Ports appeared in iommu_groups - why?

[Blank Field]

iommu_groups:
http://pastebin.com/BniH7d3F
lspci -vvv:
http://pastebin.com/ThGm3zkD

I certainly do not remember them being here for a year.

2015-10-20 2:49 GMT+03:00 Alex Williamson <alex.l.williamson at gmail.com>:

> On Mon, Oct 19, 2015 at 5:45 PM, Blank Field <ihatethisfield at gmail.com>
> wrote:
>
>> I've migrated through the whole 4.1 kernel branch and currently i am
>> using 4.2.3-200.fc22-x86_64...
>> And i don't remember my pci-e root ports being in the same group as my
>> GPUs.
>>
>> "qemu-system-x86_64: -device
>> vfio-pci,host=01:00.0,id=hostdev0,bus=pci.0,addr=0x3,rombar=1,romfile=/mnt/hdd/qemu/hybridmagic.rom:
>> vfio: error, group 1 is not viable, please ensure all devices within the
>> iommu_group are bound to their vfio bus driver."
>> (and the same for the second GPU)
>> which leads us to:
>> ./1/devices:
>> 0000:00:02.0  0000:01:00.0  0000:01:00.1
>> and
>> ./2/devices:
>> 0000:00:04.0  0000:02:00.0  0000:02:00.1
>> where 01:00.0 and 02:00.0 are GPUs, and 04.0 and 02.0 are Processor Root
>> Ports.
>>
>> ...should i bind them too?
>>
>
> No, only endpoints can be bound to vfio-pci.  Is pcieport the driver for
> them, if so, leave them alone.
>
>
>> What was changed and why?
>>
>
> Dunno, first I've heard of it.
>
>
>> This is an AMD FM2 system, i've thought ACS problems are specific to
>> intel systems.
>>
>
> Um, no.  Send `sudo lspci -vvv` and `find /sys/kernel/iommu_groups`
>
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