Hi Bibo, kernel test robot noticed the following build warnings: [auto build test WARNING on 9d7a0577c9db35c4cc52db90bc415ea248446472] url: https://github.com/intel-lab-lkp/linux/commits/Bibo-Mao/LoongArch-KVM-Add-parameter-exception-code-with-exception-handler/20250424-144905 base: 9d7a0577c9db35c4cc52db90bc415ea248446472 patch link: https://lore.kernel.org/r/20250424064625.3928278-2-maobibo%40loongson.cn patch subject: [PATCH 1/2] LoongArch: KVM: Add parameter exception code with exception handler config: loongarch-randconfig-001-20250425 (https://download.01.org/0day-ci/archive/20250425/202504251458.EJKsZMLH-lkp@xxxxxxxxx/config) compiler: loongarch64-linux-gcc (GCC) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250425/202504251458.EJKsZMLH-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202504251458.EJKsZMLH-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> arch/loongarch/kvm/exit.c:734: warning: Function parameter or struct member 'ecode' not described in 'kvm_handle_fpu_disabled' vim +734 arch/loongarch/kvm/exit.c 2737dee1067c2f Bibo Mao 2025-01-13 725 37cdfc6dbf0416 Tianrui Zhao 2023-10-02 726 /** 37cdfc6dbf0416 Tianrui Zhao 2023-10-02 727 * kvm_handle_fpu_disabled() - Guest used fpu however it is disabled at host 37cdfc6dbf0416 Tianrui Zhao 2023-10-02 728 * @vcpu: Virtual CPU context. 37cdfc6dbf0416 Tianrui Zhao 2023-10-02 729 * 37cdfc6dbf0416 Tianrui Zhao 2023-10-02 730 * Handle when the guest attempts to use fpu which hasn't been allowed 37cdfc6dbf0416 Tianrui Zhao 2023-10-02 731 * by the root context. 37cdfc6dbf0416 Tianrui Zhao 2023-10-02 732 */ 74303fac8d0580 Bibo Mao 2025-04-24 733 static int kvm_handle_fpu_disabled(struct kvm_vcpu *vcpu, int ecode) 37cdfc6dbf0416 Tianrui Zhao 2023-10-02 @734 { 37cdfc6dbf0416 Tianrui Zhao 2023-10-02 735 struct kvm_run *run = vcpu->run; 37cdfc6dbf0416 Tianrui Zhao 2023-10-02 736 db1ecca22edf27 Tianrui Zhao 2023-12-19 737 if (!kvm_guest_has_fpu(&vcpu->arch)) { db1ecca22edf27 Tianrui Zhao 2023-12-19 738 kvm_queue_exception(vcpu, EXCCODE_INE, 0); db1ecca22edf27 Tianrui Zhao 2023-12-19 739 return RESUME_GUEST; db1ecca22edf27 Tianrui Zhao 2023-12-19 740 } db1ecca22edf27 Tianrui Zhao 2023-12-19 741 37cdfc6dbf0416 Tianrui Zhao 2023-10-02 742 /* 37cdfc6dbf0416 Tianrui Zhao 2023-10-02 743 * If guest FPU not present, the FPU operation should have been 37cdfc6dbf0416 Tianrui Zhao 2023-10-02 744 * treated as a reserved instruction! 37cdfc6dbf0416 Tianrui Zhao 2023-10-02 745 * If FPU already in use, we shouldn't get this at all. 37cdfc6dbf0416 Tianrui Zhao 2023-10-02 746 */ 37cdfc6dbf0416 Tianrui Zhao 2023-10-02 747 if (WARN_ON(vcpu->arch.aux_inuse & KVM_LARCH_FPU)) { 37cdfc6dbf0416 Tianrui Zhao 2023-10-02 748 kvm_err("%s internal error\n", __func__); 37cdfc6dbf0416 Tianrui Zhao 2023-10-02 749 run->exit_reason = KVM_EXIT_INTERNAL_ERROR; 37cdfc6dbf0416 Tianrui Zhao 2023-10-02 750 return RESUME_HOST; 37cdfc6dbf0416 Tianrui Zhao 2023-10-02 751 } 37cdfc6dbf0416 Tianrui Zhao 2023-10-02 752 37cdfc6dbf0416 Tianrui Zhao 2023-10-02 753 kvm_own_fpu(vcpu); 37cdfc6dbf0416 Tianrui Zhao 2023-10-02 754 37cdfc6dbf0416 Tianrui Zhao 2023-10-02 755 return RESUME_GUEST; 37cdfc6dbf0416 Tianrui Zhao 2023-10-02 756 } 71f4fb845874c3 Tianrui Zhao 2023-10-02 757 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
