On Tue, Nov 3, 2020 at 6:59 PM Marco Elver <elver@xxxxxxxxxx> wrote: > Add architecture specific implementation details for KFENCE and enable > KFENCE for the arm64 architecture. In particular, this implements the > required interface in <asm/kfence.h>. > > KFENCE requires that attributes for pages from its memory pool can > individually be set. Therefore, force the entire linear map to be mapped > at page granularity. Doing so may result in extra memory allocated for > page tables in case rodata=full is not set; however, currently > CONFIG_RODATA_FULL_DEFAULT_ENABLED=y is the default, and the common case > is therefore not affected by this change. > > Reviewed-by: Dmitry Vyukov <dvyukov@xxxxxxxxxx> > Co-developed-by: Alexander Potapenko <glider@xxxxxxxxxx> > Signed-off-by: Alexander Potapenko <glider@xxxxxxxxxx> > Signed-off-by: Marco Elver <elver@xxxxxxxxxx> Reviewed-by: Jann Horn <jannh@xxxxxxxxxx>
