From: Andreas Schwab <schwab@linux-m68k.org>
To: Christophe Leroy <christophe.leroy@c-s.fr>
Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
j.neuschaefer@gmx.net, Michael Ellerman <mpe@ellerman.id.au>,
Paul Mackerras <paulus@samba.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>
Subject: Re: [PATCH] powerpc/mm/32s: only use MMU to mark initmem NX if STRICT_KERNEL_RWX
Date: Sat, 15 Jun 2019 16:36:15 +0200 [thread overview]
Message-ID: <87pnne9aqo.fsf@igel.home> (raw)
In-Reply-To: <20190615152559.Horde.0lTFIZALxZ-RI75z94G3jA8@messagerie.si.c-s.fr> (Christophe Leroy's message of "Sat, 15 Jun 2019 15:25:59 +0200")
On Jun 15 2019, Christophe Leroy <christophe.leroy@c-s.fr> wrote:
> Andreas Schwab <schwab@linux-m68k.org> a écrit :
>
>> If STRICT_KERNEL_RWX is disabled, never use the MMU to mark initmen
>> nonexecutable.
>
> I dont understand, can you elaborate ?
It breaks suspend.
> This area is mapped with BATs so using change_page_attr() is pointless.
There must be a reason STRICT_KERNEL_RWX is not available with
HIBERNATE.
Andreas.
--
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1
"And now for something completely different."
next prev parent reply other threads:[~2019-06-15 14:39 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-21 19:08 [PATCH v5 00/16] powerpc/32: Use BATs/LTLBs for STRICT_KERNEL_RWX Christophe Leroy
2019-02-21 19:08 ` [PATCH v5 01/16] powerpc/wii: properly disable use of BATs when requested Christophe Leroy
2019-02-26 3:27 ` [v5,01/16] " Michael Ellerman
2019-02-21 19:08 ` [PATCH v5 02/16] powerpc/mm/32: add base address to mmu_mapin_ram() Christophe Leroy
2019-02-21 19:08 ` [PATCH v5 03/16] powerpc/mm/32s: rework mmu_mapin_ram() Christophe Leroy
2019-02-21 19:08 ` [PATCH v5 04/16] powerpc/mm/32s: use generic mmu_mapin_ram() for all blocks Christophe Leroy
2019-02-21 19:08 ` [PATCH v5 05/16] powerpc/32: always populate page tables for Abatron BDI Christophe Leroy
2019-02-21 19:08 ` [PATCH v5 06/16] powerpc/wii: remove wii_mmu_mapin_mem2() Christophe Leroy
2019-02-21 19:08 ` [PATCH v5 07/16] powerpc/mm/32s: use _PAGE_EXEC in setbat() Christophe Leroy
2019-02-21 19:08 ` [PATCH v5 08/16] powerpc/32: add helper to write into segment registers Christophe Leroy
2019-02-21 19:08 ` [PATCH v5 09/16] powerpc/mmu: add is_strict_kernel_rwx() helper Christophe Leroy
2019-02-21 19:08 ` [PATCH v5 10/16] powerpc/kconfig: define PAGE_SHIFT inside Kconfig Christophe Leroy
2019-02-21 19:08 ` [PATCH v5 11/16] powerpc/kconfig: define CONFIG_DATA_SHIFT and CONFIG_ETEXT_SHIFT Christophe Leroy
2019-02-21 19:08 ` [PATCH v5 12/16] powerpc/mm/32s: add setibat() clearibat() and update_bats() Christophe Leroy
2019-02-21 19:08 ` [PATCH v5 13/16] powerpc/mm/32s: Use BATs for STRICT_KERNEL_RWX Christophe Leroy
2019-06-15 11:23 ` Andreas Schwab
2019-06-15 13:22 ` Christophe Leroy
2019-06-16 8:20 ` christophe leroy
2019-06-16 9:29 ` Andreas Schwab
2019-06-16 10:13 ` Andreas Schwab
2019-06-15 12:28 ` Andreas Schwab
2019-06-16 8:01 ` christophe leroy
2019-06-16 8:45 ` Andreas Schwab
2019-06-15 12:47 ` [PATCH] powerpc/mm/32s: only use MMU to mark initmem NX if STRICT_KERNEL_RWX Andreas Schwab
2019-06-15 13:25 ` Christophe Leroy
2019-06-15 14:36 ` Andreas Schwab [this message]
2019-06-16 8:06 ` christophe leroy
2019-06-17 21:22 ` [PATCH] powerpc/mm/32s: fix condition that is always true Andreas Schwab
2019-06-17 21:47 ` Christophe Leroy
2019-06-30 8:37 ` Michael Ellerman
2019-02-21 19:08 ` [PATCH v5 14/16] powerpc/kconfig: make _etext and data areas alignment configurable on Book3s 32 Christophe Leroy
2019-02-21 19:08 ` [PATCH v5 15/16] powerpc/8xx: don't disable large TLBs with CONFIG_STRICT_KERNEL_RWX Christophe Leroy
2019-02-21 19:08 ` [PATCH v5 16/16] powerpc/kconfig: make _etext and data areas alignment configurable on 8xx Christophe Leroy
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