This serie adds KASAN support to powerpc/32 Tested on nohash/32 (8xx) and book3s/32 (mpc832x ie 603). Boot tested on qemu mac99
Changes in v6: - Fixed oops on module loading (due to access to RO shadow zero area). - Added support for hash book3s/32, thanks to Daniel's patch to differ KASAN activation. - Reworked handling of optimised string functions (dedicated patch for it) - Reordered some files to ease adding of book3e/64 support. Changes in v5: - Added KASAN_SHADOW_OFFSET in Makefile, otherwise we fallback to KASAN_MINIMAL and some stuff like stack instrumentation is not performed - Moved calls to kasan_early_init() in head.S because stack instrumentation in machine_init was performed before the call to kasan_early_init() - Mapping kasan_early_shadow_page RW in kasan_early_init() and remaping RO later in kasan_init() - Allocating a big memblock() for shadow area, falling back to PAGE_SIZE blocks in case of failure. Changes in v4: - Comments from Andrey (DISABLE_BRANCH_PROFILING, Activation of reports) - Proper initialisation of shadow area in kasan_init() - Panic in case Hash table is required. - Added comments in patch one to explain why *t = *s becomes memcpy(t, s, ...) - Call of kasan_init_tags() Changes in v3: - Removed the printk() in kasan_early_init() to avoid build failure (see https://github.com/linuxppc/issues/issues/218) - Added necessary changes in asm/book3s/32/pgtable.h to get it work on powerpc 603 family - Added a few KASAN_SANITIZE_xxx.o := n to successfully boot on powerpc 603 family Changes in v2: - Rebased. - Using __set_pte_at() to build the early table. - Worked around and got rid of the patch adding asm/page.h in asm/pgtable-types.h ==> might be fixed independently but not needed for this serie. For book3s/32 we have to stick to KASAN_MINIMAL because Hash table management is not active early enough at the time being. Christophe Leroy (6): powerpc/mm: prepare kernel for KAsan on PPC32 powerpc/32: Move early_init() in a separate file powerpc: prepare string/mem functions for KASAN powerpc/32: Add KASAN support kasan: allow architectures to provide an outline readiness check powerpc/32: enable CONFIG_KASAN for book3s hash arch/powerpc/Kconfig | 1 + arch/powerpc/Makefile | 9 ++ arch/powerpc/include/asm/book3s/32/pgtable.h | 2 + arch/powerpc/include/asm/highmem.h | 10 +- arch/powerpc/include/asm/kasan.h | 51 ++++++++ arch/powerpc/include/asm/nohash/32/pgtable.h | 2 + arch/powerpc/include/asm/setup.h | 5 + arch/powerpc/include/asm/string.h | 26 +++- arch/powerpc/kernel/Makefile | 11 +- arch/powerpc/kernel/asm-offsets.c | 4 + arch/powerpc/kernel/cputable.c | 13 +- arch/powerpc/kernel/early_32.c | 36 ++++++ arch/powerpc/kernel/head_32.S | 3 + arch/powerpc/kernel/head_40x.S | 3 + arch/powerpc/kernel/head_44x.S | 3 + arch/powerpc/kernel/head_8xx.S | 3 + arch/powerpc/kernel/head_fsl_booke.S | 3 + arch/powerpc/kernel/prom_init_check.sh | 10 +- arch/powerpc/kernel/setup-common.c | 2 + arch/powerpc/kernel/setup_32.c | 28 ----- arch/powerpc/lib/Makefile | 16 ++- arch/powerpc/lib/copy_32.S | 13 +- arch/powerpc/lib/mem_64.S | 8 +- arch/powerpc/lib/memcpy_64.S | 4 +- arch/powerpc/mm/Makefile | 1 + arch/powerpc/mm/kasan/Makefile | 5 + arch/powerpc/mm/kasan/kasan_init_32.c | 170 ++++++++++++++++++++++++++ arch/powerpc/mm/mem.c | 4 + arch/powerpc/mm/ptdump/dump_linuxpagetables.c | 8 ++ arch/powerpc/purgatory/Makefile | 3 + arch/powerpc/xmon/Makefile | 1 + include/linux/kasan.h | 4 + mm/kasan/generic.c | 3 + 33 files changed, 412 insertions(+), 53 deletions(-) create mode 100644 arch/powerpc/include/asm/kasan.h create mode 100644 arch/powerpc/kernel/early_32.c create mode 100644 arch/powerpc/mm/kasan/Makefile create mode 100644 arch/powerpc/mm/kasan/kasan_init_32.c -- 2.13.3