[dpdk-dev] bifurcated driver

Luke Gorrie luke at snabb.co
Mon Nov 24 12:57:43 CET 2014

On 5 November 2014 at 14:00, Thomas Monjalon <thomas.monjalon at 6wind.com>

> It seems to be close to the bifurcated driver needs.
> Not sure if it can solve the security issues if there is no dedicated MMU
> in the NIC.
> I feel we should sum up pros and cons of
>         - igb_uio
>         - uio_pci_generic
>         - VFIO
>         - ibverbs
>         - bifurcated driver

I am also curious about the pros and cons of the bifurcated driver compared
with SR-IOV.

What are the practical differences between running a bifurcated driver vs.
running SR-IOV mode where the kernel owns the PF and userspace applications
own the VFs?

Specifically, could I run the ixgbe driver in the kernel (max_vfs=N),
control it via ethtool, and then access the queues via userspace VF
drivers? If so, how would this differ from the bifurcated driver?


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