On Fri, Oct 02, 2020 at 01:10:25AM +0200, Andrey Konovalov wrote: > From: Vincenzo Frascino <vincenzo.frascino@xxxxxxx> > > Provide helper functions to manipulate allocation and pointer tags for > kernel addresses. > > Low-level helper functions (mte_assign_*, written in assembly) operate > tag values from the [0x0, 0xF] range. High-level helper functions > (mte_get/set_*) use the [0xF0, 0xFF] range to preserve compatibility > with normal kernel pointers that have 0xFF in their top byte. > > MTE_GRANULE_SIZE and related definitions are moved to mte-def.h header > that doesn't have any dependencies and is safe to include into any > low-level header. > > Signed-off-by: Vincenzo Frascino <vincenzo.frascino@xxxxxxx> > Co-developed-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx> > Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx> Reviewed-by: Catalin Marinas <catalin.marinas@xxxxxxx>
