[v2,0/5] kasan: integrate with init_on_alloc/free

Message

Andrey Konovalov March 8, 2021, 3:55 p.m. UTC

This patch series integrates HW_TAGS KASAN with init_on_alloc/free
by initializing memory via the same arm64 instruction that sets memory
tags.

This is expected to improve HW_TAGS KASAN performance when
init_on_alloc/free is enabled. The exact perfomance numbers are unknown
as MTE-enabled hardware doesn't exist yet.

Changes v1->v2:
- Add and use kasan_has_integrated_init() helper.
- Update comments to not explicitly mention relation between
  HW_TAGS KASAN and memory init.
- Fix non initting memory with kasan=off by checking kasan_enabled()
  instead of IS_ENABLED(CONFIG_KASAN_HW_TAGS).

Andrey Konovalov (5):
  arm64: kasan: allow to init memory when setting tags
  kasan: init memory in kasan_(un)poison for HW_TAGS
  kasan, mm: integrate page_alloc init with HW_TAGS
  kasan, mm: integrate slab init_on_alloc with HW_TAGS
  kasan, mm: integrate slab init_on_free with HW_TAGS

 arch/arm64/include/asm/memory.h    |  4 +-
 arch/arm64/include/asm/mte-kasan.h | 20 ++++++---
 include/linux/kasan.h              | 48 +++++++++++++-------
 lib/test_kasan.c                   |  4 +-
 mm/kasan/common.c                  | 45 +++++++++----------
 mm/kasan/generic.c                 | 12 ++---
 mm/kasan/kasan.h                   | 19 ++++----
 mm/kasan/shadow.c                  | 10 ++---
 mm/kasan/sw_tags.c                 |  2 +-
 mm/mempool.c                       |  4 +-
 mm/page_alloc.c                    | 37 +++++++++++-----
 mm/slab.c                          | 43 ++++++++++--------
 mm/slab.h                          | 17 ++++++--
 mm/slub.c                          | 70 +++++++++++++++---------------
 14 files changed, 196 insertions(+), 139 deletions(-)