These patches make CONFIG_STRICT_KERNEL_RWX work with CONFIG_RELOCATABLE
The first patch splits up the radix linear mapping nicely on relocation
to support granular read-only and execution bits. The second patch warns
if relocation is actually done (PHYSICAL_START > MEMORY_START), we do
best effort support of expected permissions. We could do more granular
linear mapping, but we decided to leave it as a TODO (to check for
performance/MPSS/etc).
The last patch changes the config so that we are no longer dependent on
!RELOCATABLE for CONFIG_STRICT_KERNEL_RWX feature.
Changelog v2
- Rebase on top of the changes made in v4.13
- Move hash tables to IS_ALIGNED logic
Balbir Singh (3):
powerpc/mm/radix: Fix relocatable radix mappings for STRICT_RWX
powerpc/mm/hash: WARN if relocation is enabled and
CONFIG_STRICT_KERNEL_RWX
powerpc/strict_kernel_rwx: Don't depend on !RELOCATABLE
arch/powerpc/Kconfig | 2 +-
arch/powerpc/mm/pgtable-hash64.c | 28 +++++-
arch/powerpc/mm/pgtable-radix.c | 183 ++++++++++++++++++++++++++++++++-------
3 files changed, 178 insertions(+), 35 deletions(-)
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2.9.4
