diff --git a/include/sbi/riscv_encoding.h b/include/sbi/riscv_encoding.h
index 64f0249b..2082783c 100644
--- a/include/sbi/riscv_encoding.h
+++ b/include/sbi/riscv_encoding.h
@@ -378,6 +378,17 @@
 #define CSR_SSTATEEN2			0x10E
 #define CSR_SSTATEEN3			0x10F
 
+/* Machine-Level Control transfer records CSRs */
+#define CSR_MCTRCTL                     0x34e
+
+/* Supervisor-Level Control transfer records CSRs */
+#define CSR_SCTRCTL                     0x14e
+#define CSR_SCTRSTATUS                  0x14f
+#define CSR_SCTRDEPTH                   0x15f
+
+/* VS-Level Control transfer records CSRs */
+#define CSR_VSCTRCTL                    0x24e
+
 /* ===== Hypervisor-level CSRs ===== */
 
 /* Hypervisor Trap Setup (H-extension) */
@@ -802,6 +813,8 @@
 #define SMSTATEEN0_CS			(_ULL(1) << SMSTATEEN0_CS_SHIFT)
 #define SMSTATEEN0_FCSR_SHIFT		1
 #define SMSTATEEN0_FCSR			(_ULL(1) << SMSTATEEN0_FCSR_SHIFT)
+#define SMSTATEEN0_CTR_SHIFT		54
+#define SMSTATEEN0_CTR			(_ULL(1) << SMSTATEEN0_CTR_SHIFT)
 #define SMSTATEEN0_CONTEXT_SHIFT	57
 #define SMSTATEEN0_CONTEXT		(_ULL(1) << SMSTATEEN0_CONTEXT_SHIFT)
 #define SMSTATEEN0_IMSIC_SHIFT		58
diff --git a/include/sbi/sbi_hart.h b/include/sbi/sbi_hart.h
index 4c36c778..c3a7feb7 100644
--- a/include/sbi/sbi_hart.h
+++ b/include/sbi/sbi_hart.h
@@ -75,6 +75,10 @@ enum sbi_hart_extensions {
 	SBI_HART_EXT_ZICFISS,
 	/** Hart has Ssdbltrp extension */
 	SBI_HART_EXT_SSDBLTRP,
+	/** HART has CTR M-mode CSRs */
+	SBI_HART_EXT_SMCTR,
+	/** HART has CTR S-mode CSRs */
+	SBI_HART_EXT_SSCTR,
 
 	/** Maximum index of Hart extension */
 	SBI_HART_EXT_MAX,
diff --git a/lib/sbi/sbi_hart.c b/lib/sbi/sbi_hart.c
index 8e2979b5..c343805c 100644
--- a/lib/sbi/sbi_hart.c
+++ b/lib/sbi/sbi_hart.c
@@ -105,6 +105,11 @@ static void mstatus_init(struct sbi_scratch *scratch)
 		else
 			mstateen_val &= ~(SMSTATEEN0_SVSLCT);
 
+		if (sbi_hart_has_extension(scratch, SBI_HART_EXT_SSCTR))
+			mstateen_val |= SMSTATEEN0_CTR;
+		else
+			mstateen_val &= ~SMSTATEEN0_CTR;
+
 		csr_write(CSR_MSTATEEN0, mstateen_val);
 #if __riscv_xlen == 32
 		csr_write(CSR_MSTATEEN0H, mstateen_val >> 32);
@@ -688,6 +693,8 @@ const struct sbi_hart_ext_data sbi_hart_ext[] = {
 	__SBI_HART_EXT_DATA(zicfilp, SBI_HART_EXT_ZICFILP),
 	__SBI_HART_EXT_DATA(zicfiss, SBI_HART_EXT_ZICFISS),
 	__SBI_HART_EXT_DATA(ssdbltrp, SBI_HART_EXT_SSDBLTRP),
+	__SBI_HART_EXT_DATA(smctr, SBI_HART_EXT_SMCTR),
+	__SBI_HART_EXT_DATA(ssctr, SBI_HART_EXT_SSCTR),
 };
 
 _Static_assert(SBI_HART_EXT_MAX == array_size(sbi_hart_ext),