On Fri, Sep 25, 2020 at 12:50:30AM +0200, Andrey Konovalov wrote:

From: Vincenzo Frascino <vincenzo.frascino@arm.com>

Hardware tag-based KASAN relies on Memory Tagging Extension (MTE) which
is an armv8.5-a architecture extension.

Enable the correct asm option when the compiler supports it in order to
allow the usage of ALTERNATIVE()s with MTE instructions.

Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Andrey Konovalov <redacted>

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>

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