Hi Nicholas, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: fdcbcd1348f4ef713668bae1b0fa9774e1811205 commit: f771b55731fc82b1e8e9ef123f6f1b8d8c92bc63 [10210/14948] KVM: PPC: Use KVM_CAP_PPC_AIL_MODE_3 config: powerpc-randconfig-c003-20220331 (https://download.01.org/0day-ci/archive/20220331/202203311821.zttpWgVU-lkp@xxxxxxxxx/config) compiler: powerpc-linux-gcc (GCC) 11.2.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=f771b55731fc82b1e8e9ef123f6f1b8d8c92bc63 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout f771b55731fc82b1e8e9ef123f6f1b8d8c92bc63 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=powerpc SHELL=/bin/bash arch/powerpc/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): arch/powerpc/kvm/powerpc.c: In function 'kvm_vm_ioctl_check_extension': >> arch/powerpc/kvm/powerpc.c:716:29: error: implicit declaration of function 'kvmhv_on_pseries' [-Werror=implicit-function-declaration] 716 | if (kvmhv_on_pseries()) { | ^~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/kvmhv_on_pseries +716 arch/powerpc/kvm/powerpc.c 593 594 case KVM_CAP_PPC_ALLOC_HTAB: 595 r = hv_enabled; 596 break; 597 #endif /* CONFIG_PPC_BOOK3S_64 */ 598 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE 599 case KVM_CAP_PPC_SMT: 600 r = 0; 601 if (kvm) { 602 if (kvm->arch.emul_smt_mode > 1) 603 r = kvm->arch.emul_smt_mode; 604 else 605 r = kvm->arch.smt_mode; 606 } else if (hv_enabled) { 607 if (cpu_has_feature(CPU_FTR_ARCH_300)) 608 r = 1; 609 else 610 r = threads_per_subcore; 611 } 612 break; 613 case KVM_CAP_PPC_SMT_POSSIBLE: 614 r = 1; 615 if (hv_enabled) { 616 if (!cpu_has_feature(CPU_FTR_ARCH_300)) 617 r = ((threads_per_subcore << 1) - 1); 618 else 619 /* P9 can emulate dbells, so allow any mode */ 620 r = 8 | 4 | 2 | 1; 621 } 622 break; 623 case KVM_CAP_PPC_RMA: 624 r = 0; 625 break; 626 case KVM_CAP_PPC_HWRNG: 627 r = kvmppc_hwrng_present(); 628 break; 629 case KVM_CAP_PPC_MMU_RADIX: 630 r = !!(hv_enabled && radix_enabled()); 631 break; 632 case KVM_CAP_PPC_MMU_HASH_V3: 633 r = !!(hv_enabled && kvmppc_hv_ops->hash_v3_possible && 634 kvmppc_hv_ops->hash_v3_possible()); 635 break; 636 case KVM_CAP_PPC_NESTED_HV: 637 r = !!(hv_enabled && kvmppc_hv_ops->enable_nested && 638 !kvmppc_hv_ops->enable_nested(NULL)); 639 break; 640 #endif 641 case KVM_CAP_SYNC_MMU: 642 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE 643 r = hv_enabled; 644 #elif defined(KVM_ARCH_WANT_MMU_NOTIFIER) 645 r = 1; 646 #else 647 r = 0; 648 #endif 649 break; 650 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE 651 case KVM_CAP_PPC_HTAB_FD: 652 r = hv_enabled; 653 break; 654 #endif 655 case KVM_CAP_NR_VCPUS: 656 /* 657 * Recommending a number of CPUs is somewhat arbitrary; we 658 * return the number of present CPUs for -HV (since a host 659 * will have secondary threads "offline"), and for other KVM 660 * implementations just count online CPUs. 661 */ 662 if (hv_enabled) 663 r = min_t(unsigned int, num_present_cpus(), KVM_MAX_VCPUS); 664 else 665 r = min_t(unsigned int, num_online_cpus(), KVM_MAX_VCPUS); 666 break; 667 case KVM_CAP_MAX_VCPUS: 668 r = KVM_MAX_VCPUS; 669 break; 670 case KVM_CAP_MAX_VCPU_ID: 671 r = KVM_MAX_VCPU_IDS; 672 break; 673 #ifdef CONFIG_PPC_BOOK3S_64 674 case KVM_CAP_PPC_GET_SMMU_INFO: 675 r = 1; 676 break; 677 case KVM_CAP_SPAPR_MULTITCE: 678 r = 1; 679 break; 680 case KVM_CAP_SPAPR_RESIZE_HPT: 681 r = !!hv_enabled; 682 break; 683 #endif 684 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE 685 case KVM_CAP_PPC_FWNMI: 686 r = hv_enabled; 687 break; 688 #endif 689 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM 690 case KVM_CAP_PPC_HTM: 691 r = !!(cur_cpu_spec->cpu_user_features2 & PPC_FEATURE2_HTM) || 692 (hv_enabled && cpu_has_feature(CPU_FTR_P9_TM_HV_ASSIST)); 693 break; 694 #endif 695 #if defined(CONFIG_KVM_BOOK3S_HV_POSSIBLE) 696 case KVM_CAP_PPC_SECURE_GUEST: 697 r = hv_enabled && kvmppc_hv_ops->enable_svm && 698 !kvmppc_hv_ops->enable_svm(NULL); 699 break; 700 case KVM_CAP_PPC_DAWR1: 701 r = !!(hv_enabled && kvmppc_hv_ops->enable_dawr1 && 702 !kvmppc_hv_ops->enable_dawr1(NULL)); 703 break; 704 case KVM_CAP_PPC_RPT_INVALIDATE: 705 r = 1; 706 break; 707 #endif 708 case KVM_CAP_PPC_AIL_MODE_3: 709 r = 0; 710 /* 711 * KVM PR, POWER7, and some POWER9s don't support AIL=3 mode. 712 * The POWER9s can support it if the guest runs in hash mode, 713 * but QEMU doesn't necessarily query the capability in time. 714 */ 715 if (hv_enabled) { > 716 if (kvmhv_on_pseries()) { 717 if (pseries_reloc_on_exception()) 718 r = 1; 719 } else if (cpu_has_feature(CPU_FTR_ARCH_207S) && 720 !cpu_has_feature(CPU_FTR_P9_RADIX_PREFETCH_BUG)) { 721 r = 1; 722 } 723 } 724 break; 725 default: 726 r = 0; 727 break; 728 } 729 return r; 730 -- 0-DAY CI Kernel Test Service https://01.org/lkp
