diff --git a/disasm/isa_parser.cc b/disasm/isa_parser.cc
index 7f5d64c6..b0e93862 100644
--- a/disasm/isa_parser.cc
+++ b/disasm/isa_parser.cc
@@ -150,7 +150,8 @@ static const extension_info_t extension_infos[] = {
   {"zkr", {EXT_ZKR}},
   {"zkt"},
   {"smepmp", {EXT_SMEPMP}},
-  {"sspmp", {EXT_SSPMP, EXT_SMPMPDELEG, EXT_SMCSRIND, EXT_SSCSRIND}},
+  {"smpmpdeleg", {EXT_SMPMPDELEG}},
+  {"sspmp", {EXT_SSPMP, EXT_SMCSRIND, EXT_SSCSRIND}, {"smpmpdeleg"}},
   {"sspmpen", {EXT_SSPMPEN}},
   {"smstateen", {EXT_SMSTATEEN}},
   {"smpmpmt", {EXT_SMPMPMT}},
diff --git a/riscv/csrs.cc b/riscv/csrs.cc
index 5fa06810..bbebad06 100644
--- a/riscv/csrs.cc
+++ b/riscv/csrs.cc
@@ -116,8 +116,8 @@ reg_t base_pmpaddr_csr_t::napot_mask() const noexcept {
 }
 
 bool base_pmpaddr_csr_t::match4(reg_t addr) const noexcept {
-  if (proc->extension_enabled_const(EXT_SSPMPEN) && (pmpidx+1 >= proc->n_pmp)) {
-    if (!((state->spmpen->read() >> pmpidx) & 1))
+  if (proc->extension_enabled_const(EXT_SSPMPEN) && (pmpidx >= proc->n_pmp)) {
+    if (!((state->spmpen->read() >> (pmpidx - proc->n_pmp)) & 1))
       return false;
   }
 
@@ -129,8 +129,8 @@ bool base_pmpaddr_csr_t::match4(reg_t addr) const noexcept {
 }
 
 bool base_pmpaddr_csr_t::subset_match(reg_t addr, reg_t len) const noexcept {
-  if (proc->extension_enabled_const(EXT_SSPMPEN) && (pmpidx+1 >= proc->n_pmp)) {
-    if (!((state->spmpen->read() >> pmpidx) & 1))
+  if (proc->extension_enabled_const(EXT_SSPMPEN) && (pmpidx >= proc->n_pmp)) {
+    if (!((state->spmpen->read() >> (pmpidx - proc->n_pmp)) & 1))
       return false;
   }
 
@@ -590,7 +590,7 @@ reg_t base_status_csr_t::compute_sstatus_write_mask() const noexcept {
   const bool has_vs = proc->any_vector_extensions();
   return 0
     | (proc->extension_enabled('S') ? (SSTATUS_SIE | SSTATUS_SPIE | SSTATUS_SPP) : 0)
-    | (has_page ? (SSTATUS_SUM | SSTATUS_MXR) : 0)
+    | (has_page || proc->extension_enabled_const(EXT_SSPMP)? (SSTATUS_SUM | SSTATUS_MXR) : 0)
     | (has_fs ? SSTATUS_FS : 0)
     | (proc->any_custom_extensions() ? SSTATUS_XS : 0)
     | (has_vs ? SSTATUS_VS : 0)
diff --git a/riscv/processor.cc b/riscv/processor.cc
index 39edccd3..95ceb349 100644
--- a/riscv/processor.cc
+++ b/riscv/processor.cc
@@ -221,7 +221,7 @@ void processor_t::set_spmp_addr_entry()
   }
 
   for (size_t i = 0; i < (state.max_pmp - n_pmp); ++i) {
-    state.pmpaddr[n_pmp+i] = std::make_shared<spmpaddr_csr_t>(this, i);
+    state.pmpaddr[n_pmp+i] = std::make_shared<spmpaddr_csr_t>(this, n_pmp+i);
     state.mireg[0]->add_ireg_proxy(0x100+i, state.pmpaddr[n_pmp+i]);
     state.nonvirtual_sireg[0]->add_ireg_proxy(0x100+i, state.pmpaddr[n_pmp+i]);
   }