diff --git a/tools/testing/selftests/kvm/riscv/get-reg-list.c b/tools/testing/selftests/kvm/riscv/get-reg-list.c
index 8cece02ca23a..a464aa6c0b09 100644
--- a/tools/testing/selftests/kvm/riscv/get-reg-list.c
+++ b/tools/testing/selftests/kvm/riscv/get-reg-list.c
@@ -73,6 +73,7 @@ bool filter_reg(__u64 reg)
 	case KVM_REG_RISCV_ISA_EXT | KVM_REG_RISCV_ISA_SINGLE | KVM_RISCV_ISA_EXT_ZKSED:
 	case KVM_REG_RISCV_ISA_EXT | KVM_REG_RISCV_ISA_SINGLE | KVM_RISCV_ISA_EXT_ZKSH:
 	case KVM_REG_RISCV_ISA_EXT | KVM_REG_RISCV_ISA_SINGLE | KVM_RISCV_ISA_EXT_ZKT:
+	case KVM_REG_RISCV_ISA_EXT | KVM_REG_RISCV_ISA_SINGLE | KVM_RISCV_ISA_EXT_ZTSO:
 	case KVM_REG_RISCV_ISA_EXT | KVM_REG_RISCV_ISA_SINGLE | KVM_RISCV_ISA_EXT_ZVBB:
 	case KVM_REG_RISCV_ISA_EXT | KVM_REG_RISCV_ISA_SINGLE | KVM_RISCV_ISA_EXT_ZVBC:
 	case KVM_REG_RISCV_ISA_EXT | KVM_REG_RISCV_ISA_SINGLE | KVM_RISCV_ISA_EXT_ZVFH:
@@ -436,6 +437,7 @@ static const char *isa_ext_single_id_to_str(__u64 reg_off)
 		KVM_ISA_EXT_ARR(ZKSED),
 		KVM_ISA_EXT_ARR(ZKSH),
 		KVM_ISA_EXT_ARR(ZKT),
+		KVM_ISA_EXT_ARR(ZTSO),
 		KVM_ISA_EXT_ARR(ZVBB),
 		KVM_ISA_EXT_ARR(ZVBC),
 		KVM_ISA_EXT_ARR(ZVFH),
@@ -957,6 +959,7 @@ KVM_ISA_EXT_SIMPLE_CONFIG(zkr, ZKR);
 KVM_ISA_EXT_SIMPLE_CONFIG(zksed, ZKSED);
 KVM_ISA_EXT_SIMPLE_CONFIG(zksh, ZKSH);
 KVM_ISA_EXT_SIMPLE_CONFIG(zkt, ZKT);
+KVM_ISA_EXT_SIMPLE_CONFIG(ztso, ZTSO);
 KVM_ISA_EXT_SIMPLE_CONFIG(zvbb, ZVBB);
 KVM_ISA_EXT_SIMPLE_CONFIG(zvbc, ZVBC);
 KVM_ISA_EXT_SIMPLE_CONFIG(zvfh, ZVFH);
@@ -1010,6 +1013,7 @@ struct vcpu_reg_list *vcpu_configs[] = {
 	&config_zksed,
 	&config_zksh,
 	&config_zkt,
+	&config_ztso,
 	&config_zvbb,
 	&config_zvbc,
 	&config_zvfh,