Hi Yang, Thank you for the patch! Yet something to improve: [auto build test ERROR on kvm/linux-next] [also build test ERROR on next-20200319] [cannot apply to vhost/linux-next tip/auto-latest linux/master linus/master v5.6-rc6] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Yang-Weijiang/Introduce-support-for-guest-CET-feature/20200320-155517 base: https://git.kernel.org/pub/scm/virt/kvm/kvm.git linux-next config: x86_64-rhel (attached as .config) compiler: gcc-7 (Debian 7.5.0-5) 7.5.0 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> Note: the linux-review/Yang-Weijiang/Introduce-support-for-guest-CET-feature/20200320-155517 HEAD 8410cecc9c65bb83a88a1bd5d46ea7ebdd947367 builds fine. It only hurts bisectibility. All errors (new ones prefixed by >>): arch/x86/kvm/x86.c: In function 'kvm_set_cr0': >> arch/x86/kvm/x86.c:807:53: error: 'X86_CR4_CET' undeclared (first use in this function); did you mean 'X86_CR0_ET'? if (!(cr0 & X86_CR0_WP) && kvm_read_cr4_bits(vcpu, X86_CR4_CET)) ^~~~~~~~~~~ X86_CR0_ET arch/x86/kvm/x86.c:807:53: note: each undeclared identifier is reported only once for each function it appears in vim +807 arch/x86/kvm/x86.c 778 779 cr0 &= ~CR0_RESERVED_BITS; 780 781 if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) 782 return 1; 783 784 if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) 785 return 1; 786 787 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { 788 #ifdef CONFIG_X86_64 789 if ((vcpu->arch.efer & EFER_LME)) { 790 int cs_db, cs_l; 791 792 if (!is_pae(vcpu)) 793 return 1; 794 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); 795 if (cs_l) 796 return 1; 797 } else 798 #endif 799 if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.walk_mmu, 800 kvm_read_cr3(vcpu))) 801 return 1; 802 } 803 804 if (!(cr0 & X86_CR0_PG) && kvm_read_cr4_bits(vcpu, X86_CR4_PCIDE)) 805 return 1; 806 > 807 if (!(cr0 & X86_CR0_WP) && kvm_read_cr4_bits(vcpu, X86_CR4_CET)) 808 return 1; 809 810 kvm_x86_ops->set_cr0(vcpu, cr0); 811 812 if ((cr0 ^ old_cr0) & X86_CR0_PG) { 813 kvm_clear_async_pf_completion_queue(vcpu); 814 kvm_async_pf_hash_reset(vcpu); 815 } 816 817 if ((cr0 ^ old_cr0) & update_bits) 818 kvm_mmu_reset_context(vcpu); 819 820 if (((cr0 ^ old_cr0) & X86_CR0_CD) && 821 kvm_arch_has_noncoherent_dma(vcpu->kvm) && 822 !kvm_check_has_quirk(vcpu->kvm, KVM_X86_QUIRK_CD_NW_CLEARED)) 823 kvm_zap_gfn_range(vcpu->kvm, 0, ~0ULL); 824 825 return 0; 826 } 827 EXPORT_SYMBOL_GPL(kvm_set_cr0); 828 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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