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 07:48:08 +0100
From:   Christophe Leroy <christophe.leroy@....fr>
To:     Michael Ellerman <mpe@...erman.id.au>,
        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



Le 21/12/2018 à 06:07, Michael Ellerman a écrit :
> 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.
> 

Yes that's right the ppc64 part is from Russel. As it's still an RFC and 
there is still some work to be done I didn't pay much attention to 
Signed-off and other tags yet.

Signed-off-by: Russell Currey <ruscur@...sell.cc>


Christophe