kvm_riscv_vcpu_reg_indices_sbi
int kvm_riscv_vcpu_reg_indices_sbi(struct kvm_vcpu *vcpu, u64 __user *uindices);
return kvm_riscv_vcpu_reg_indices_sbi(vcpu, NULL);
ret = kvm_riscv_vcpu_reg_indices_sbi(vcpu, uindices);