Subject: Re: [PATCH 2/2] selftests: vm: pkeys: Fix powerpc access right updates

From: Florian Weimer <[email-masked]>
Date: Fri, 08 May 2020 20:01:34 +0200

* Sandipan Das:

> The Power ISA mandates that all writes to the Authority
> Mask Register (AMR) must always be preceded as well as
> succeeded by a context-synchronizing instruction. This
> applies to both the privileged and unprivileged variants
> of the Move To AMR instruction.

Ugh.  Do you have a reference for that?

We need to fix this in glibc.

Thanks,
Florian