On 11/20/21 8:46 AM, Yifei Jiang wrote: > + id = kvm_riscv_reg_id(env, KVM_REG_RISCV_CONFIG, KVM_REG_RISCV_CONFIG_REG(isa)); > + ret = kvm_get_one_reg(cs, id, &isa); > + if (ret) { > + return ret; > + } > + env->misa_mxl |= isa; This doesn't look right. I'm sure you meant env->misa_ext = isa; r~