[PATCH v7 2/9] x86, kfence: enable KFENCE for x86

[Jann Horn]

On Tue, Nov 3, 2020 at 6:59 PM Marco Elver <elver at google.com> wrote:
> Add architecture specific implementation details for KFENCE and enable
> KFENCE for the x86 architecture. In particular, this implements the
> required interface in <asm/kfence.h> for setting up the pool and
> providing helper functions for protecting and unprotecting pages.
>
> For x86, we need to ensure that the pool uses 4K pages, which is done
> using the set_memory_4k() helper function.
>
> Reviewed-by: Dmitry Vyukov <dvyukov at google.com>
> Co-developed-by: Marco Elver <elver at google.com>
> Signed-off-by: Marco Elver <elver at google.com>
> Signed-off-by: Alexander Potapenko <glider at google.com>

Reviewed-by: Jann Horn <jannh at google.com>