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 <redacted>
Signed-off-by: Andrey Konovalov <redacted>

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

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