diff --git a/feature.c b/feature.c
index ec30c17..495a0bb 100644
--- a/feature.c
+++ b/feature.c
@@ -290,6 +290,17 @@ void setup_features(void)
 			while(1);
 		}
 		break;
+	case 0x9:
+		if(cpu_ver >= 0x0) {
+			csr_clear(CSR_MXSTATUS, 0x1);
+			csr_write(CSR_MISELECT,CSR_MNASTATUS);
+			csr_write(CSR_MIREG,0x1e);
+			csr_write(CSR_MISELECT, CSR_L2_TRA_CTRL);
+			csr_set(CSR_MIREG2, 0x1600);
+		} else {
+			while(1);
+		}
+		break;
 	default:
 		while(1);
 	}
diff --git a/riscv_encoding.h b/riscv_encoding.h
index d93c11c..41e52ca 100644
--- a/riscv_encoding.h
+++ b/riscv_encoding.h
@@ -15,6 +15,7 @@
 #define CSR_MCOUNTERWEN  0x7c9
 #define CSR_MSMPR	 0x7f3
 #define CSR_MNASTATUS   0x8000000000000210
+#define CSR_L2_TRA_CTRL 0x8000000000001600
 
 /* clang-format off */
 #define MSTATUS_SIE			_UL(0x00000002)
@@ -251,6 +252,7 @@
 #define CSR_MTVAL2			0x34b
 #define CSR_MISELECT    	0x350
 #define CSR_MIREG       	0x351
+#define CSR_MIREG2			0x352
 #define CSR_PMPCFG0			0x3a0
 #define CSR_PMPCFG1			0x3a1
 #define CSR_PMPCFG2			0x3a2