MM_CTXT_ASID_MASK
#define MM_CTXT_CYCLE_MASK (~MM_CTXT_ASID_MASK)
#define MM_CTXT_FIRST_CYCLE (MM_CTXT_ASID_MASK + 1)
#define hw_pid(mm, cpu) (asid_mm(mm, cpu) & MM_CTXT_ASID_MASK)
if (unlikely(!(++asid_cpu(cpu) & MM_CTXT_ASID_MASK))) {