[PATCH 10/12] arm64: kasan: simplify and inline MTE functions

Vincenzo Frascino vincenzo.frascino at arm.com
Thu Feb 4 07:39:08 EST 2021

Hi Andrew,

On 2/1/21 10:44 PM, Andrew Morton wrote:
> On Mon,  1 Feb 2021 20:43:34 +0100 Andrey Konovalov <andreyknvl at google.com> wrote:
>> This change provides a simpler implementation of mte_get_mem_tag(),
>> mte_get_random_tag(), and mte_set_mem_tag_range().
>> Simplifications include removing system_supports_mte() checks as these
>> functions are onlye called from KASAN runtime that had already checked
>> system_supports_mte(). Besides that, size and address alignment checks
>> are removed from mte_set_mem_tag_range(), as KASAN now does those.
>> This change also moves these functions into the asm/mte-kasan.h header
>> and implements mte_set_mem_tag_range() via inline assembly to avoid
>> unnecessary functions calls.
>> Co-developed-by: Vincenzo Frascino <vincenzo.frascino at arm.com>
>> Signed-off-by: Andrey Konovalov <andreyknvl at google.com>
> Co-developed-by requires a Signed-off-by: as well.  Vincenzo, please
> send us one?

I added my Signed-off-by to the patch.


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