VF bound to Kernel driver

Question

VF bound to Kernel driver

ahalimx86 opened this issue 6 years ago · comments

Hi,
Is it possible to have the VFs bound to Linux kernel drivers and PF with igb_uio then have VFd to configure those VFs? Or it is a hard requirement to have VF bound to vfio-pci/igb_uio?

I'm considering a use-case where I might have some VFs bound to Kernel driver and some to the vfio-pci. Are there any implications one should be particularly concerned about such scenario? Thanks.

Alex Z · Answer 1 · Thu Sep 06 2018 00:43:10 GMT+0800 (China Standard Time)

You can bind VFs to kernel ixfbevf driver as well as igb_uio/vfio-pci or pci-stub if you use VM’s.
In any case VFd has to be started before VFs could be used.

Abdul Halim · Answer 2 · Thu Sep 06 2018 16:53:03 GMT+0800 (China Standard Time)

Thats great, thanks for the info. What about i40evf with Fortville NICs(X710)? I'm testing with this NIC at the moment. I have tried using VF's with both kernel driver and dpdk driver. It looks like VFd is applying the VF configurations regardless of the driver type, but I haven't verified them. However, I noticed when I stop VFd daemon the system crushes down. I was wondering if this was because of the VF drivers.

Alex Z · Answer 3 · Sat Sep 08 2018 05:13:27 GMT+0800 (China Standard Time)

X710 NICs were not thoroughly tested yet.
Try do unload kernel i40evf driver or stop DPDK application bound to VF before stopping VFd