On Mon, Aug 22, 2022 at 11:32 AM Alexander Potapenko <glider@xxxxxxxxxx> wrote: > > On Mon, Aug 15, 2022 at 6:15 AM Kirill A. Shutemov > <kirill.shutemov@xxxxxxxxxxxxxxx> wrote: > > > > Add a couple of arch_prctl() handles: > > > > - ARCH_ENABLE_TAGGED_ADDR enabled LAM. The argument is required number > > of tag bits. It is rounded up to the nearest LAM mode that can > > provide it. For now only LAM_U57 is supported, with 6 tag bits. > > > > - ARCH_GET_UNTAG_MASK returns untag mask. It can indicates where tag > > bits located in the address. > > > > - ARCH_GET_MAX_TAG_BITS returns the maximum tag bits user can request. > > Zero if LAM is not supported. > > > > Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx> > Reviewed-by: Alexander Potapenko <glider@xxxxxxxxxx> And also: Tested-by: Alexander Potapenko <glider@xxxxxxxxxx>
