linux/arch/powerpc/mm/book3s32
Christophe Leroy 4b19f96a81 powerpc/32s: Don't warn when mapping RO data ROX.
Mapping RO data as ROX is not an issue since that data
cannot be modified to introduce an exploit.

PPC64 accepts to have RO data mapped ROX, as a trade off
between kernel size and strictness of protection.

On PPC32, kernel size is even more critical as amount of
memory is usually small.

Depending on the number of available IBATs, the last IBATs
might overflow the end of text. Only warn if it crosses
the end of RO data.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/6499f8eeb2a36330e5c9fc1cee9a79374875bd54.1589866984.git.christophe.leroy@csgroup.eu
2020-05-26 22:22:19 +10:00
..
hash_low.S powerpc/32s: reorder Linux PTE bits to better match Hash PTE bits. 2020-03-25 12:09:27 +11:00
Makefile
mmu_context.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
mmu.c powerpc/32s: Don't warn when mapping RO data ROX. 2020-05-26 22:22:19 +10:00
tlb.c powerpc/32: refactor pmd_offset(pud_offset(pgd_offset... 2020-02-26 10:34:40 +11:00