Update README for illegal/hint instruction
@@ -229,8 +229,8 @@ conditions for the load/store testing.
| no_load_store | Disable load/store instruction | 0 |
| no_csr_instr | Disable CSR instruction | 0 |
| no_fence | Disable fence instruction | 0 |
-| enable_illegal_instruction | Enable illegal instructions | 0 |
-| enable_hint_instruction | Enable HINT instruction | 0 |
+| illegal_instr_ratio | Number of illegal instructions every 1000 instr | 0 |
+| hint_instr_ratio | Number of HINT instructions every 1000 instr | 0 |
| boot_mode | m:Machine mode, s:Supervisor mode, u:User mode | m |
| no_directed_instr | Disable directed instruction stream | 0 |
| require_signature_addr | Set to 1 if test needs to talk to testbench | 0 |
