linux-kernel - RE: [PATCH] powerpc/603: Fix protection of user pages mapped with PROT

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Message-ID: <921d9e7e-6680-4f83-8652-a88ebb64650f@THSDC1IRIMBX11P.iris.infra.thales>
Date:   Mon, 15 Mar 2021 08:55:39 +0000
From:   PLATTNER Christoph <christoph.plattner@...lesgroup.com>
To:     Michael Ellerman <patch-notifications@...erman.id.au>,
        Michael Ellerman <mpe@...erman.id.au>,
        Paul Mackerras <paulus@...ba.org>,
        "Benjamin Herrenschmidt" <benh@...nel.crashing.org>,
        Christophe Leroy <christophe.leroy@...roup.eu>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "PLATTNER Christoph" <christoph.plattner@...lesgroup.com>
Subject: RE: [PATCH] powerpc/603: Fix protection of user pages mapped with
 PROT_NONE


Thank you for maintenance and for following this request.

Regards
Christoph

-----Original Message-----
From: Michael Ellerman <patch-notifications@...erman.id.au> 
Sent: Sonntag, 14. März 2021 11:01
To: Michael Ellerman <mpe@...erman.id.au>; Paul Mackerras <paulus@...ba.org>; Benjamin Herrenschmidt <benh@...nel.crashing.org>; PLATTNER Christoph <christoph.plattner@...lesgroup.com>; Christophe Leroy <christophe.leroy@...roup.eu>
Cc: linux-kernel@...r.kernel.org; linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH] powerpc/603: Fix protection of user pages mapped with PROT_NONE

On Mon, 1 Feb 2021 06:29:50 +0000 (UTC), Christophe Leroy wrote:
> On book3s/32, page protection is defined by the PP bits in the PTE 
> which provide the following protection depending on the access keys 
> defined in the matching segment register:
> - PP 00 means RW with key 0 and N/A with key 1.
> - PP 01 means RW with key 0 and RO with key 1.
> - PP 10 means RW with both key 0 and key 1.
> - PP 11 means RO with both key 0 and key 1.
> 
> [...]

Applied to powerpc/fixes.

[1/1] powerpc/603: Fix protection of user pages mapped with PROT_NONE
      https://git.kernel.org/powerpc/c/c119565a15a628efdfa51352f9f6c5186e506a1c

cheers