Enable STRICT_KERNEL_RWX for PPC64/BOOK3S These patches enable RX mappings of kernel text. rodata is mapped RX as well as a trade-off, there are more details in the patch description
As a prerequisite for R/O text, patch_instruction is moved over to using a separate mapping that allows write to kernel text. xmon/ftrace/kprobes have been moved over to work with patch_instruction There is a bug fix, the updatepp and updateboltedpp (pseries) providers, did not use flags as described in PAPR There are patches for 32 bit support from Christophe Leroy at http://patchwork.ozlabs.org/patch/768257/. The patches for map_page to map_kernel_page are a pre-requisite to this series being applied. Another build failure was reported, because instead of using ARCH_HAS_SET_MEMORY as a gate for set_memory.h inclusion, some of the infrastructure in the core kernel uses CONFIG_STRICT_KERNEL_RWX. I've sent a fix to the fix the latter. Changelog v3: Support radix Drop ptdump patch, already picked from v2 Changelog v2: Support optprobes via patch_instruction Balbir Singh (9): powerpc/lib/code-patching: Enhance code patching powerpc/kprobes: Move kprobes over to patch_instruction powerpc/kprobes/optprobes: Move over to patch_instruction powerpc/xmon: Add patch_instruction supporf for xmon powerpc/vmlinux.lds: Align __init_begin to 16M powerpc/platform/pseries/lpar: Fix updatepp and updateboltedpp powerpc/mm/hash: Implement mark_rodata_ro() for hash powerpc/Kconfig: Enable STRICT_KERNEL_RWX powerpc/mm/radix: Implement mark_rodata_ro() for radix arch/powerpc/Kconfig | 1 + arch/powerpc/include/asm/book3s/64/hash.h | 3 + arch/powerpc/include/asm/book3s/64/radix.h | 4 + arch/powerpc/kernel/kprobes.c | 4 +- arch/powerpc/kernel/optprobes.c | 58 +++++++----- arch/powerpc/kernel/vmlinux.lds.S | 10 ++- arch/powerpc/lib/code-patching.c | 140 ++++++++++++++++++++++++++++- arch/powerpc/mm/pgtable-hash64.c | 35 ++++++++ arch/powerpc/mm/pgtable-radix.c | 73 ++++++++++++++- arch/powerpc/mm/pgtable_64.c | 9 ++ arch/powerpc/platforms/pseries/lpar.c | 13 ++- arch/powerpc/xmon/xmon.c | 7 +- 12 files changed, 323 insertions(+), 34 deletions(-) -- 2.9.4
