AIA: eidelivery does not gate *topei registers

Author: i2h2

riscv/csrs.cc

@@ -2259,7 +2259,7 @@ reg_t hgeip_csr_t::read() const noexcept {
   // scan through all VGEINs
   reg_t v = 0;
   for (auto &i: proc->imsic->vs) {
-    if (i.second->topei())
+    if (i.second->delivery() && i.second->topei())
       v |= reg_t(1) << i.first;
   }
   return v;

riscv/imsic.cc

@@ -48,8 +48,6 @@ imsic_file_t::imsic_file_t(processor_t* const proc, reg_t mip_mask, size_t num_r
 }
 
 reg_t imsic_file_t::topei() {
-  if (eidelivery->read() != 1)
-    return 0;
   reg_t thd = eithreshold->read();
   for (size_t i = 0; i < IMSIC_NUM_EI_REGS; i++) {
     reg_t ints = eip[i]->read() & eie[i]->read();
@@ -81,7 +79,7 @@ void imsic_file_t::pendei(reg_t intr) {
 }
 
 void imsic_file_t::update_mip() {
-  reg_t iid = topei();
+  reg_t iid = eidelivery->read() ? topei() : 0;
   if (v) {
     // Privileged 9.2.4: Register hgeie selects the subset of guest external interrupts that cause a supervisor-level (HS-level) guest external interrupt.
     bool sgeip = proc->get_state()->hgeie->read() & proc->get_state()->hgeip->read();

riscv/imsic.h

@@ -44,6 +44,7 @@ class imsic_file_t {
   void claimei(reg_t intr);
   void pendei(reg_t intr);
   void update_mip();
+  bool delivery() { return eidelivery->read(); }
   csr_t_p get_reg(reg_t reg) { return csrmap.count(reg) ? csrmap[reg] : nullptr; }
   csrmap_t csrmap;