On Tue, Sep 15, 2020 at 11:16PM +0200, 'Andrey Konovalov' via kasan-dev wrote: > This patch add a set of arch_*() memory tagging helpers currently only > defined for arm64 when hardware tag-based KASAN is enabled. These helpers > will be used by KASAN runtime to implement the hardware tag-based mode. > > The arch-level indirection level is introduced to simplify adding hardware > tag-based KASAN support for other architectures in the future by defining > the appropriate arch_*() macros. > > Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx> > Co-developed-by: Vincenzo Frascino <vincenzo.frascino@xxxxxxx> > Signed-off-by: Vincenzo Frascino <vincenzo.frascino@xxxxxxx> > --- > Change-Id: I42b0795a28067872f8308e00c6f0195bca435c2a > --- > arch/arm64/include/asm/memory.h | 8 ++++++++ > mm/kasan/kasan.h | 19 +++++++++++++++++++ > 2 files changed, 27 insertions(+) > > diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h > index e424fc3a68cb..268a3b6cebd2 100644 > --- a/arch/arm64/include/asm/memory.h > +++ b/arch/arm64/include/asm/memory.h > @@ -231,6 +231,14 @@ static inline const void *__tag_set(const void *addr, u8 tag) > return (const void *)(__addr | __tag_shifted(tag)); > } > > +#ifdef CONFIG_KASAN_HW_TAGS > +#define arch_init_tags(max_tag) mte_init_tags(max_tag) > +#define arch_get_random_tag() mte_get_random_tag() > +#define arch_get_mem_tag(addr) mte_get_mem_tag(addr) > +#define arch_set_mem_tag_range(addr, size, tag) \ > + mte_set_mem_tag_range((addr), (size), (tag)) Suggested edit below, assuming you're fine with checkpatch.pl's new 100col limit: -#define set_mem_tag_range(addr, size, tag) \ - arch_set_mem_tag_range((addr), (size), (tag)) +#define set_mem_tag_range(addr, size, tag) arch_set_mem_tag_range((addr), (size), (tag))
