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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@google.com> Co-developed-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> --- Change-Id: I42b0795a28067872f8308e00c6f0195bca435c2a
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