| Message ID | cover.1612538932.git.andreyknvl@google.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | kasan: optimizations and fixes for HW_TAGS | expand |
On Fri, Feb 5, 2021 at 4:39 PM Andrey Konovalov <andreyknvl@google.com> wrote: > > This patchset goes on top of: > > 1. Vincenzo's async support patches [1], and > 2. "kasan: untag addresses for KFENCE" fix [2] (already in mm). > > [1] https://lore.kernel.org/linux-arm-kernel/20210130165225.54047-1-vincenzo.frascino@arm.com/ > [2] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?h=akpm&id=dec4728fab910da0c86cf9a97e980f4244ebae9f > > This patchset makes the HW_TAGS mode more efficient, mostly by reworking > poisoning approaches and simplifying/inlining some internal helpers. > > With this change, the overhead of HW_TAGS annotations excluding setting > and checking memory tags is ~3%. The performance impact caused by tags > will be unknown until we have hardware that supports MTE. > > As a side-effect, this patchset speeds up generic KASAN by ~15%. Forgot to include changes v1->v2: - Use EXPORT_SYMBOL_GPL() for arm64 symbols. - Rename kmalloc bool flag argument to is_kmalloc. - Make empty mte_set_mem_tag_range() return void. - Fix build warning in 32-bit systems by using unsigned long instead of u64 in WARN_ON() checks. - Minor changes in comments and commit descriptions. - Use kfence_ksize() before __ksize() to avoid crashes with KFENCE. - Use inline instead of __always_inline. > > Andrey Konovalov (12): > kasan, mm: don't save alloc stacks twice > kasan, mm: optimize kmalloc poisoning > kasan: optimize large kmalloc poisoning > kasan: clean up setting free info in kasan_slab_free > kasan: unify large kfree checks > kasan: rework krealloc tests > kasan, mm: fail krealloc on freed objects > kasan, mm: optimize krealloc poisoning > kasan: ensure poisoning size alignment > arm64: kasan: simplify and inline MTE functions > kasan: inline HW_TAGS helper functions > arm64: kasan: export MTE symbols for KASAN tests > > arch/arm64/include/asm/cache.h | 1 - > arch/arm64/include/asm/kasan.h | 1 + > arch/arm64/include/asm/mte-def.h | 2 + > arch/arm64/include/asm/mte-kasan.h | 65 ++++++++-- > arch/arm64/include/asm/mte.h | 2 - > arch/arm64/kernel/mte.c | 48 +------- > arch/arm64/lib/mte.S | 16 --- > include/linux/kasan.h | 25 ++-- > lib/test_kasan.c | 111 +++++++++++++++-- > mm/kasan/common.c | 187 ++++++++++++++++++++--------- > mm/kasan/kasan.h | 72 +++++++++-- > mm/kasan/shadow.c | 53 ++++---- > mm/slab_common.c | 18 ++- > mm/slub.c | 3 +- > 14 files changed, 418 insertions(+), 186 deletions(-) > > -- > 2.30.0.365.g02bc693789-goog >
On Fri, Feb 5, 2021 at 4:39 PM Andrey Konovalov <andreyknvl@google.com> wrote: > > This patchset goes on top of: > > 1. Vincenzo's async support patches [1], and Nevermind this, Vincenzo is planning to do more work on the async patches, so I'll post v3 of this patchset based on the mm tree. > 2. "kasan: untag addresses for KFENCE" fix [2] (already in mm). > > [1] https://lore.kernel.org/linux-arm-kernel/20210130165225.54047-1-vincenzo.frascino@arm.com/ > [2] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?h=akpm&id=dec4728fab910da0c86cf9a97e980f4244ebae9f