[PATCH v3 23/39] arm64: Enable armv8.5-a asm-arch option

[Catalin Marinas]

On Fri, Sep 25, 2020 at 12:50:30AM +0200, Andrey Konovalov wrote:
> From: Vincenzo Frascino <vincenzo.frascino at 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 at arm.com>
> Signed-off-by: Andrey Konovalov <andreyknvl at google.com>

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