[dpdk-dev] unable to bind to vfio-pci

[Burakov, Anatoly]

On 17-Sep-20 10:21 AM, Sarosh Arif wrote:
> On Thu, Sep 17, 2020 at 2:17 PM Bruce Richardson
> <bruce.richardson at intel.com> wrote:
>>
>> On Thu, Sep 17, 2020 at 11:52:58AM +0500, Sarosh Arif wrote:
>>> I have been trying to bind to vfio-pci using usertools/dpdk-devbind.py
>>> but am unable to do so. The reason behind this is that I am unable to
>>> write in /sys/bus/pci/drivers/vfio-pci/bind. Upon searching solutions
>>> I tried a couple of things such as setting iommu=pt and intel_iommu=on
>>> and ensured vt-d is enabled.
>>> Along with this I have made sure that the vfio-pci module is correctly
>>> loaded. I have also tried
>>>
>>> chmod 666 /sys/bus/pci/drivers/vfio-pci/bind
>>>
>>> So that I have permissions to write in this file.
>>>
>>> The error I get when I use usertools/dpdk-devbind.py to bind is this:
>>> Error: bind failed for 0000:b7:00.1 - Cannot bind to driver vfio-pci
>>>
>>> The details of 0000:b7:00.1 are as follows:
>>> Ethernet Connection X722 for 10GBASE-T 37d2' if=eno6 drv=i40e
>>>
>>> I have also unbinded The pci bridge to which 0000:b7:00.1 was connected.
>>>
>>> What more can be done to resolve this?
>>>
>> Since you describe changing permissions on the "bind" file, are you trying
>> to run dpdk-devbind.py as a non-root user? Does it work as root?
> I am running it as a root user. It does not work as a root user.
> 

Does "dmesg | tail" say anything of interest?

-- 
Thanks,
Anatoly