[dpdk-users] Cannot Bind eth0 to vfio-pci Driver

[Stephen Hemminger]

On Thu, 6 Dec 2018 10:41:26 +0500
Ramzah Rehman <ramzahrehman at gmail.com> wrote:

> I am trying to bind an interface eth0 to vfio driver. I have made sure
> iommu is enabled in grub and kernel. I have loaded the module vfio-pci. Ran
> following commands
> 
> #modprobe vfio-pci
> #chmod a+x /dev/vfio
> #chmod 0666 /dev/vfio/*
> #export DPDK_DIR=/usr/src/dpdk-stable-17.11.4
> #sudo $DPDK_DIR/usertools/dpdk-devbind.py --bind=vfio-pci 02:01.0
> 
> I got following error:
> 
> Error: bind failed for 0000:02:01.0 - Cannot bind to driver vfio-pci
> 
> I checked the error in dmesg:
> 
> Got :
> 
> [ 1815.793823] vfio-pci: probe of 0000:02:01.0 failed with error -22
> 
> let me know the reason.
> 
> Best Regards,
> Ramzah Rehman

Check other threads. For VFIO to work you need at a minimum:
	* Hardware with IOMMU
	* VT-d enabled in BIOS
	* Device on PCI not sharing IOMMU-group

See vfio.txt in Linux kernel documentation for a full explanation.
https://www.kernel.org/doc/Documentation/vfio.txt