linux-kernel - Re: [RFC PATCH v2 04/11] powerpc/mm: Add a framework for Kernel Userspace Access Protection

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Date:   Fri, 21 Dec 2018 16:07:53 +1100
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Christophe Leroy <christophe.leroy@....fr>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>, ruscur@...sell.cc
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [RFC PATCH v2 04/11] powerpc/mm: Add a framework for Kernel Userspace Access Protection

Christophe Leroy <christophe.leroy@....fr> writes:

> This patch implements a framework for Kernel Userspace Access
> Protection.
>
> Then subarches will have to possibility to provide their own
> implementation by providing setup_kuap() and lock/unlock_user_access()
>
> Some platform will need to know the area accessed and whether it is
> accessed from read, write or both. Therefore source, destination and
> size and handed over to the two functions.
>
> Signed-off-by: Christophe Leroy <christophe.leroy@....fr>

I think some of this code came from Russell's original patch?

In which case we should have his signed-off-by here.

cheers