[dpdk-dev] [PATCH v2 0/3] ethdev: configure SR-IOV VF from host

[Jerin Jacob]

On Wed, Oct 30, 2019 at 12:52 PM Shahaf Shuler <shahafs at mellanox.com> wrote:
>
> Wednesday, October 30, 2019 6:09 AM, Jerin Jacob:
> > Subject: Re: [dpdk-dev] [PATCH v2 0/3] ethdev: configure SR-IOV VF from
> > host
> >
> > On Wed, Oct 30, 2019 at 12:21 AM Thomas Monjalon
> > <thomas at monjalon.net> wrote:
> > >
> > > In a virtual environment, the network controller may have to configure
> > > some SR-IOV VF parameters for security reasons.
> >
> > Just to understand, Could you explain more details/examples for security
> > reasons?
> >
> > >
> > > When the PF (host port) is driven by DPDK (OVS-DPDK case), we face two
> > > different cases:
> > >     - driver is bifurcated (Mellanox case),
> > >       so the VF can be configured via the kernel.
> > >     - driver is on top of UIO or VFIO, so DPDK API is required,
> >
> > Not true. Both UIO and VFIO are NOT allowed to create SRIOV VF from the
> > PF device.
> > It is only allowed through igb-uio out of tree driver without iommu support.
>
> Per my understanding Thomas proposal is not to create the VFs from the PF device. it is to configure their network attributes from the PF after they have been created.

Yes. My question is without creating the VF, How do you control them?