Refer old discussion at https://lore.kernel.org/lkml/20200422152656.GF676@willie-the-truck/T/#m802eaf33efd6f8d575939d157301b35ac0d4a64f And https://github.com/KSPP/linux/issues/35 This series refactors CONFIG_DEBUG_WX for the 5 architectures implementing CONFIG_GENERIC_PTDUMP First rename stuff in ARM which uses similar names while not implementing CONFIG_GENERIC_PTDUMP. Then define a generic version of debug_checkwx() that calls ptdump_check_wx() when CONFIG_DEBUG_WX is set. Call it immediately after calling mark_rodata_ro() instead of calling it at the end of every mark_rodata_ro(). Then implement a debugfs attribute that can be used to trigger a W^X test at anytime and regardless of CONFIG_DEBUG_WX Changes in v2: - Fixed a few build failures (patch 1 and 2) - Added patch 4 - Make the attribute return SUCCESS/FAILURE as suggested by Heiko (patch 5) Christophe Leroy (5): arm: ptdump: Rename CONFIG_DEBUG_WX to CONFIG_ARM_DEBUG_WX arm64, powerpc, riscv, s390, x86: ptdump: Refactor CONFIG_DEBUG_WX powerpc,s390: ptdump: Define ptdump_check_wx() regardless of CONFIG_DEBUG_WX mm: ptdump: Have ptdump_check_wx() return bool mm: ptdump: add check_wx_pages debugfs attribute arch/arm/Kconfig.debug | 2 +- arch/arm/configs/aspeed_g4_defconfig | 2 +- arch/arm/configs/aspeed_g5_defconfig | 2 +- arch/arm/include/asm/ptdump.h | 6 +++--- arch/arm/mm/init.c | 2 +- arch/arm64/include/asm/ptdump.h | 7 ------- arch/arm64/mm/mmu.c | 2 -- arch/arm64/mm/ptdump.c | 11 ++++++++--- arch/powerpc/mm/mmu_decl.h | 6 ------ arch/powerpc/mm/pgtable_32.c | 4 ---- arch/powerpc/mm/pgtable_64.c | 3 --- arch/powerpc/mm/ptdump/ptdump.c | 21 ++++++++++++++------- arch/riscv/include/asm/ptdump.h | 22 ---------------------- arch/riscv/mm/init.c | 3 --- arch/riscv/mm/ptdump.c | 12 ++++++++---- arch/s390/include/asm/ptdump.h | 14 -------------- arch/s390/mm/dump_pagetables.c | 21 +++++++++++---------- arch/s390/mm/init.c | 2 -- arch/x86/include/asm/pgtable.h | 5 ++--- arch/x86/mm/dump_pagetables.c | 20 ++++++++++++++------ arch/x86/mm/init_32.c | 2 -- arch/x86/mm/init_64.c | 2 -- include/linux/ptdump.h | 7 +++++++ init/main.c | 2 ++ mm/ptdump.c | 22 ++++++++++++++++++++++ 25 files changed, 95 insertions(+), 107 deletions(-) delete mode 100644 arch/riscv/include/asm/ptdump.h delete mode 100644 arch/s390/include/asm/ptdump.h -- 2.43.0
