From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: Christophe Leroy <christophe.leroy@c-s.fr>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>
Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: Re: [v3] powerpc/mm: add exec protection on powerpc 603
Date: Sat, 22 Dec 2018 20:54:31 +1100 (AEDT) [thread overview]
Message-ID: <43MLSR6WTrz9sDP@ozlabs.org> (raw)
In-Reply-To: <62fcfb8435c2f801d820eff469fd01e68c1b107d.1543425412.git.christophe.leroy@c-s.fr>
On Wed, 2018-11-28 at 17:21:10 UTC, Christophe Leroy wrote:
> The 603 doesn't have a HASH table, TLB misses are handled by
> software. It is then possible to generate page fault when
> _PAGE_EXEC is not set like in nohash/32.
>
> There is one "reserved" PTE bit available, this patch uses
> it for _PAGE_EXEC.
>
> In order to support it, set_pte_filter() and
> set_access_flags_filter() are made common, and the handling
> is made dependent on MMU_FTR_HPTE_TABLE
>
> Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Applied to powerpc next, thanks.
https://git.kernel.org/powerpc/c/385e89d5b20f5a7c33fd7c1904da0e
cheers
prev parent reply other threads:[~2018-12-22 17:02 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-28 17:21 [PATCH v3] powerpc/mm: add exec protection on powerpc 603 Christophe Leroy
2018-11-28 17:21 ` Christophe Leroy
2018-11-29 12:13 ` Christophe LEROY
2018-11-29 12:13 ` Christophe LEROY
2018-12-22 9:54 ` Michael Ellerman [this message]
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