Re: [PATCH v4 09/35] kmsan: Expose kmsan_get_metadata()

[Alexander Potapenko]

On Thu, Jun 13, 2024 at 5:39 PM Ilya Leoshkevich <i...@linux.ibm.com> wrote:
>
> Each s390 CPU has lowcore pages associated with it. Each CPU sees its
> own lowcore at virtual address 0 through a hardware mechanism called
> prefixing. Additionally, all lowcores are mapped to non-0 virtual
> addresses stored in the lowcore_ptr[] array.
>
> When lowcore is accessed through virtual address 0, one needs to
> resolve metadata for lowcore_ptr[raw_smp_processor_id()].
>
> Expose kmsan_get_metadata() to make it possible to do this from the
> arch code.
>
> Signed-off-by: Ilya Leoshkevich <i...@linux.ibm.com>
Reviewed-by: Alexander Potapenko <gli...@google.com>