pointer masking: Implement [sh]envcfg.PMM

Author: YenHaoChen

riscv/mmu.cc

@@ -622,6 +622,10 @@ reg_t mmu_t::get_pmlen(bool effective_virt, reg_t effective_priv, xlate_flags_t
     pmm = get_field(proc->state.mseccfg->read(), MSECCFG_PMM);
   else if (!effective_virt && (effective_priv == PRV_S || (!proc->extension_enabled('S') && effective_priv == PRV_U)))
     pmm = get_field(proc->state.menvcfg->read(), MENVCFG_PMM);
+  else if (effective_virt && effective_priv == PRV_S)
+    pmm = get_field(proc->state.henvcfg->read(), HENVCFG_PMM);
+  else if (effective_priv == PRV_U)
+    pmm = get_field(proc->state.senvcfg->read(), SENVCFG_PMM);
 
   switch (pmm) {
     case 2: return 7;