On 13/11/2018 20:36, Andy Lutomirski wrote:

On Tue, Nov 13, 2018 at 10:33 AM Igor Stoppa [off-list ref] wrote:

[...]

quoted

Unless the secondary mapping is also available to other cores, through
the shared mm_struct ?

I don't think this matters much.  The other cores will only be able to
use that mapping when they're doing a rare write.

Which has now been promoted to target for attacks :-)

--
igor