lkml.org 
[lkml]   [2020]   [Aug]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Date
    Subject[PATCH 27/35] kasan, arm64: align allocations for HW_TAGS
    From
    Hardware tag-based KASAN uses the memory tagging approach, which requires
    all allocations to be aligned to the memory granule size. Align the
    allocations to MTE_GRANULE_SIZE via ARCH_SLAB_MINALIGN when
    CONFIG_KASAN_HW_TAGS is enabled.

    Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
    ---
    arch/arm64/include/asm/cache.h | 3 +++
    1 file changed, 3 insertions(+)

    diff --git a/arch/arm64/include/asm/cache.h b/arch/arm64/include/asm/cache.h
    index a4d1b5f771f6..b8a0cae38470 100644
    --- a/arch/arm64/include/asm/cache.h
    +++ b/arch/arm64/include/asm/cache.h
    @@ -6,6 +6,7 @@
    #define __ASM_CACHE_H

    #include <asm/cputype.h>
    +#include <asm/mte_asm.h>

    #define CTR_L1IP_SHIFT 14
    #define CTR_L1IP_MASK 3
    @@ -50,6 +51,8 @@

    #ifdef CONFIG_KASAN_SW_TAGS
    #define ARCH_SLAB_MINALIGN (1ULL << KASAN_SHADOW_SCALE_SHIFT)
    +#elif defined(CONFIG_KASAN_HW_TAGS)
    +#define ARCH_SLAB_MINALIGN MTE_GRANULE_SIZE
    #endif

    #ifndef __ASSEMBLY__
    --
    2.28.0.220.ged08abb693-goog
    \
     
     \ /
      Last update: 2020-08-14 19:30    [W:4.107 / U:0.044 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site