linux-kernel - [PATCH 0/7] powerpc/mm: Fix kernel protection and implement STRICT_KERNEL

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Date:   Mon, 29 May 2017 17:31:54 +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 0/7] 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.

It superseeds the previous patch set identified "Fix kernel protection
and implement CONFIG_DEBUG_RODATA on PPC32"

This set is based on Balbir Singh <bsingharora@...il.com> set identified
"Enable STRICT_KERNEL_RWX" and applies on top of it.

At the end we take the opportunity to get rid of some unneccessary/outdated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

Christophe Leroy (7):
  powerpc/mm: rename map_page() to map_kernel_page() on PPC32
  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: remove __this_fixmap_does_not_exist()
  powerpc/mm: Simplify __set_fixmap()

 arch/powerpc/Kconfig                         |  3 +-
 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/kernel/vmlinux.lds.S            |  2 +-
 arch/powerpc/mm/8xx_mmu.c                    |  2 +-
 arch/powerpc/mm/dma-noncoherent.c            |  2 +-
 arch/powerpc/mm/init_32.c                    |  6 +++
 arch/powerpc/mm/mem.c                        |  5 +-
 arch/powerpc/mm/mmu_decl.h                   |  4 +-
 arch/powerpc/mm/pgtable_32.c                 | 73 ++++++++++++++++------------
 11 files changed, 69 insertions(+), 44 deletions(-)

-- 
2.12.0