Intel QAT 8970 accel card on ARM Ampere Server

[David Marchand]

On Tue, Oct 10, 2023 at 5:03 PM Dharmik Jayesh Thakkar
<DharmikJayesh.Thakkar at arm.com> wrote:
> > > On kernel vers. 5.9+ we need to load the vfio-pci driver with the
> > > additional parameter disable_denylist=1
> >
> > o_O
> > I did not know this option, but it scares me a bit, reading its description.
> > Could you please elaborate why this is needed?
> >
> >
>
> Details for adding QAT to denylist provided in the below commit:
> https://github.com/torvalds/linux/commit/50173329c8cc0c892eaa7a9d0f0692ac39cd7b04

Dharmik,
Ok, thanks.
That matches what I found in the qat documentation:
http://doc.dpdk.org/guides/cryptodevs/qat.html#binding-the-available-vfs-to-the-vfio-pci-driver


Patrick,
Sorry for jumping in this thread, but to be clear, this
disable_denylist option is really specific to this model of
quickassist crypto card.
It must not be enabled in other setups using vfio.


-- 
David Marchand