On Wed, Jan 29, 2020 at 10:52:40AM +0100, Greg KH wrote:

> It just needs to be part of the bus logic for the specific bus that this
> "firewall" is on.  Just like we do the same thing for USB or thunderbolt
> devices.  Put this in the bus-specific code please.

I'd expect that this is going to affect at least platform and AMBA
buses.