# Re: \[PATCH 31/35\] kasan, arm64: implement HW\_TAGS runtime

- From: Andrey Konovalov \<hidden\>
- Date: 2020-08-27 14:57:20 
- List: linux-arm-kernel
- Page: https://ratatoskr.run/linux-arm-kernel/2020/08/6085174
- Thread: https://ratatoskr.run/linux-arm-kernel/2020/08/6068760/t.md

```text
On Thu, Aug 27, 2020 at 12:45 PM Catalin Marinas
[ref] wrote:
>
> On Fri, Aug 14, 2020 at 07:27:13PM +0200, Andrey Konovalov wrote:
> > diff --git a/mm/kasan/mte.c b/mm/kasan/mte.c
> > new file mode 100644
> > index 000000000000..43b7d74161e5
> > --- /dev/null
> > +++ b/mm/kasan/mte.c
>
> Since this is an arm64-specific kasan backend, I wonder whether it makes
> more sense to keep it under arch/arm64 (mte-kasan.c).

I'm not sure if we do. I'd rather keep everything together, spreading
the implementation around the kernel is inconvenient. We already have
software tag-based KASAN implementation (which is also arm64-specific)
in the common code. We could, perhaps, rename mte.c into something
more generic, with other potential future hardware modes in mind.

> > diff --git a/mm/kasan/report_mte.c b/mm/kasan/report_mte.c
> > new file mode 100644
> > index 000000000000..dbbf3aaa8798
> > --- /dev/null
> > +++ b/mm/kasan/report_mte.c
>
> Same for this one.

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