On Wed, Oct 30, 2019 at 12:52 PM Shahaf Shuler <shah...@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
> > <tho...@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?

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