Merge branch 'csr-check' into xs

2a73091a · William Wang · 59e2eb4b · bb889546 · 2a73091a
隐藏空白更改
内联并排

Showing with 5 addition and 0 deletion

src/isa/riscv64/exec/system.h src/isa/riscv64/exec/system.h +5 -0

未找到文件。
--- a/src/isa/riscv64/exec/system.h
+++ b/src/isa/riscv64/exec/system.h
@@ -9,6 +9,11 @@ static inline bool csr_check(DecodeExecState *s, uint32_t addr) {
      raise_intr(s, EX_II, cpu.pc);
      return false;
  }
+  int lowest_access_priv_level = (addr & 0b11 << 8) >> 8; // addr(9,8)
+  if (!(cpu.mode >= lowest_access_priv_level)) {
+    raise_intr(s, EX_II, cpu.pc);
+    return false;
+  }
  return true;
 }