On 21-Sep-20 12:54 PM, Sarosh Arif wrote:
On Thu, Sep 17, 2020 at 2:35 PM Burakov, Anatoly
<anatoly.bura...@intel.com> wrote:
On 17-Sep-20 10:21 AM, Sarosh Arif wrote:
On Thu, Sep 17, 2020 at 2:17 PM Bruce Richardson
<bruce.richard...@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?
This is the output of dmesg | tail:
[136286.136271] ixgbe 0000:65:00.0 enp101s0f0: NIC Link is Down
[221230.023654] ixgbe 0000:65:00.0 enp101s0f0: NIC Link is Up 10 Gbps,
Flow Control: RX/TX
[221230.024134] ixgbe 0000:65:00.0 enp101s0f0: NIC Link is Down
[249273.956525] ixgbe 0000:65:00.0 enp101s0f0: NIC Link is Up 10 Gbps,
Flow Control: RX/TX
[249273.957003] ixgbe 0000:65:00.0 enp101s0f0: NIC Link is Down
[314864.386303] EXT4-fs (sda1): mounting ext3 file system using the
ext4 subsystem
[314867.734973] EXT4-fs (sda1): mounted filesystem with ordered data
mode. Opts: (null)
[332584.888223] ixgbe 0000:65:00.0 enp101s0f0: NIC Link is Up 10 Gbps,
Flow Control: RX/TX
[332584.888700] ixgbe 0000:65:00.0 enp101s0f0: NIC Link is Down
[358429.954026] VFIO - User Level meta-driver version: 0.3
So, nothing useful :)
To me, it starts to sound more and more like some kind of security
measure. Either it's something like AppArmor/SELinux preventing you from
binding the drivers, or maybe it's something like Secure Boot, or some
other security-related feature. A "permission denied" error is usually
indicative of such things.
I'm not really an expert on this so i can't tell you off the top of my
head what to check, but my first stop would have been either Secure
Boot-related settings, or SELinux/AppArmor logs.
--
Thanks,
Anatoly
--
Thanks,
Anatoly
