Re: [PATCH v8 29/43] arm64: mte: Add in-kernel tag fault handler

Catalin Marinas
2020-11-05T16:57:34Z

On Thu, Nov 05, 2020 at 12:18:44AM +0100, Andrey Konovalov wrote:
> From: Vincenzo Frascino <vincenzo.frascino@arm.com>
>
> Add the implementation of the in-kernel fault handler.
>
> When a tag fault happens on a kernel address:
> * MTE is disabled on the current CPU,
> * the execution continues.
>
> When a tag fault happens on a user address:
> * the kernel executes do_bad_area() and panics.
>
> The tag fault handler for kernel addresses is currently empty and will be
> filled in by a future commit.
>
> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
> Co-developed-by: Andrey Konovalov <andreyknvl@google.com>
> Signed-off-by: Andrey Konovalov <andreyknvl@google.com>

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