[PATCH v2 0/3] powerpc/mm: Fix kernel protection and implement CONFIG_DEBUG_RODATA on PPC32

Christophe Leroy
2017-04-21T13:02:08Z

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

Changes in v2:
Instead of making the entire kernel RW to patch code in ftrace,
we now only change the rights on the page to be modified

Christophe Leroy (3):
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 CONFIG_DEBUG_RODATA on PPC32

arch/powerpc/Kconfig.debug | 11 +++++++
arch/powerpc/include/asm/pgtable.h | 8 ++++++
arch/powerpc/kernel/ftrace.c | 8 ++++--
arch/powerpc/mm/init_32.c | 3 +-
arch/powerpc/mm/mem.c | 1 +
arch/powerpc/mm/mmu_decl.h | 3 ++
arch/powerpc/mm/pgtable_32.c | 59 +++++++++++++++++++++++++++++++++-----
7 files changed, 82 insertions(+), 11 deletions(-)

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2.12.0