Hi Marek,

On Sun, Sep 27, 2020 at 12:02:19AM +0200, Marek Behun wrote:

Andrew, can this be used to write the registers from userspace, or only
to read it?

It is intended for reading only.
https://www.kernel.org/doc/html/latest/networking/devlink/devlink-region.html

Thanks,
-Vladimir