[PATCH 27/35] kasan, arm64: align allocations for HW_TAGS
From: Andrey Konovalov <hidden>
Date: 2020-08-14 17:28:39
Also in:
linux-mm, lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
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 <redacted> --- 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
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