linux-kernel - [PATCH v3 0/5] powerpc/mm: Fix kernel protection and implement STRICT_KERNEL

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Date:   Wed,  2 Aug 2017 15:50:58 +0200 (CEST)
From:   Christophe Leroy <christophe.leroy@....fr>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Scott Wood <oss@...error.net>,
        Balbir Singh <bsingharora@...il.com>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH v3 0/5] powerpc/mm: Fix kernel protection and implement STRICT_KERNEL_RWX on PPC32

This patch set implements STRICT_KERNEL_RWX on Powerpc32
after fixing a few issues related to kernel code page protection.

At the end we take the opportunity to get rid of some unneccessary/outdated
fixmap stuff.

Changes from v2 to v3:
* Rebased on latest linux-powerpc/merge branch
* Function remap_init_ram() renamed mark_initmem_nx() to match new
  PPC64 implementation

Changes from v1 to v2:
* Rebased on latest linux-next following including of STRICT_KERNEL_RWX for PPC64
* Removed from the serie the two patches already applied.

Christophe Leroy (5):
  powerpc/mm: Ensure change_page_attr() doesn't invalidate pinned TLBs
  powerpc/mm: Fix kernel RAM protection after freeing unused memory on
    PPC32
  powerpc/mm: Implement STRICT_KERNEL_RWX on PPC32
  powerpc/mm: declare some local functions static
  powerpc/mm: Simplify __set_fixmap()

 arch/powerpc/Kconfig                         |  2 +-
 arch/powerpc/include/asm/book3s/32/pgtable.h |  3 --
 arch/powerpc/include/asm/fixmap.h            | 10 +++--
 arch/powerpc/include/asm/nohash/32/pgtable.h |  3 --
 arch/powerpc/include/asm/pgtable.h           |  2 +-
 arch/powerpc/kernel/vmlinux.lds.S            |  2 +-
 arch/powerpc/mm/init_32.c                    |  6 +++
 arch/powerpc/mm/pgtable_32.c                 | 66 ++++++++++++++++++----------
 8 files changed, 58 insertions(+), 36 deletions(-)

-- 
2.13.3