@vger.kernel.org; linuxppc-...@lists.ozlabs.org
Subject: Re: [PATCH] powerpc/603: Fix protection of user pages mapped with
PROT_NONE
On Mon, 1 Feb 2021 06:29:50 + (UTC), Christophe Leroy wrote:
> On book3s/32, page protection is defined by the PP bits in the PTE
> which provide the fol
On Mon, 1 Feb 2021 06:29:50 + (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.
; KOENIG Werner
Subject: Re: [PATCH] powerpc/603: Fix protection of user pages mapped with
PROT_NONE
Le 01/02/2021 à 11:22, PLATTNER Christoph a écrit :
> Hello to all, and thank you very much for first and second fast response.
>
> I do not have a long history on PowerPC MMU envir
Le 01/02/2021 à 11:22, PLATTNER Christoph a écrit :
Hello to all, and thank you very much for first and second fast response.
I do not have a long history on PowerPC MMU environment, I hacked into this
topic
for about 3 months for analyzing that problem- so, sorry, if I am wrong in some
--
From: Christophe Leroy
Sent: Montag, 1. Februar 2021 07:30
To: Benjamin Herrenschmidt ; Paul Mackerras
; Michael Ellerman ; PLATTNER Christoph
Cc: linux-kernel@vger.kernel.org; linuxppc-...@lists.ozlabs.org
Subject: [PATCH] powerpc/603: Fix protection of user pages mapped with PROT_NONE
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
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