[dpdk-dev] [PATCH v2 1/1] doc: document vfio-pci usage with QAT PMD

[Burakov, Anatoly]

On 08-Sep-20 5:19 PM, Adam Dybkowski wrote:
> This patch marks the old igb-uio driver as unsecure when used
> with the QAT PMD and updates all examples to recommend using
> vfio-pci instead.
> It also mentions security issues with the QAT CPM and provides
> information about the new vfio-pci parameter 'disable_denylist'
> available in Linux kernels 5.9 and later.
> 
> Signed-off-by: Adam Dybkowski <adamx.dybkowski at intel.com>
> Acked-by: Fiona Trahe <fiona.trahe at intel.com>
> ---

<snip>

>   
>       cd to the top-level DPDK directory
>       modprobe uio

No need to modprobe uio if you're using VFIO.

> -    insmod ./build/kmod/igb_uio.ko
> -    echo "8086 37c9" > /sys/bus/pci/drivers/igb_uio/new_id
> +    modprobe vfio-pci
> +    echo "8086 37c9" > /sys/bus/pci/drivers/vfio-pci/new_id

This seems like very outdated instructions from when we had a PCI ID 
filtering in igb_uio. Devbind way is better in every way, so why keep 
this at all?

>       lspci -vvd:37c9
>   
> +Use ``modprobe vfio-pci disable_denylist=1`` from kernel 5.9 onwards.
> +See note in the section `Binding the available VFs to the vfio-pci driver`_
> +above.
>   
> -Another way to bind the VFs to the DPDK UIO driver is by using the
> +Another way to bind the VFs to the vfio-pci driver is by using the
>   ``dpdk-devbind.py`` script::
>   
>       cd to the top-level DPDK directory
> -    ./usertools/dpdk-devbind.py -b igb_uio 0000:03:01.1
> +    ./usertools/dpdk-devbind.py -b vfio-pci 0000:03:01.1
>   
>   Testing
>   ~~~~~~~
> 


-- 
Thanks,
Anatoly