Forbid `csrw vsstatus` from modifying the UXL field (#671)

Since this is not modifiable in the real sstatus, so it should not be in the virtualized version either.
5 years ago · 6d5a351a98
1 changed files with 1 additions and 0 deletions
--- a/riscv/processor.cc
+++ b/riscv/processor.cc
@ -1189,6 +1189,7 @@ void processor_t::set_csr(int which, reg_t val)
          ((state.vsstatus & SSTATUS_XS) == SSTATUS_XS)) {
         state.vsstatus |= (xlen == 64 ? SSTATUS64_SD : SSTATUS32_SD);
      }
+      state.vsstatus = set_field(state.vsstatus, SSTATUS_UXL, xlen_to_uxl(max_xlen));
      break;
    }
    case CSR_VSIE: {