tree: https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git kvm-arm64/pmu-debug-fixes-5.11 head: 2aa1837246b4399ed85dba448b8dd19b48b95573 commit: 2aa1837246b4399ed85dba448b8dd19b48b95573 [7/7] KVM: arm64: Use symbolic names for the PMU versions config: arm64-allyesconfig (attached as .config) compiler: aarch64-linux-gcc (GCC) 9.3.0 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/maz/arm-platforms.git/com... git remote add arm-platforms https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git git fetch --no-tags arm-platforms kvm-arm64/pmu-debug-fixes-5.11 git checkout 2aa1837246b4399ed85dba448b8dd19b48b95573 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): arch/arm64/kvm/pmu-emul.c: In function 'kvm_pmu_event_mask': 26 | case ID_DFR0_PERFMON_8_0: | ^~~~~~~~~~~~~~~~~~~ | ID_DFR0_PERFMON_8_1 arch/arm64/kvm/pmu-emul.c:26:7: note: each undeclared identifier is reported only once for each function it appears in 29 | case ID_DFR0_PERFMON_8_4: | ^~~~~~~~~~~~~~~~~~~ | ID_DFR0_PERFMON_8_1 30 | case ID_DFR0_PERFMON_8_5: | ^~~~~~~~~~~~~~~~~~~ | ID_DFR0_PERFMON_8_1 vim +26 arch/arm64/kvm/pmu-emul.c 22 23 static u32 kvm_pmu_event_mask(struct kvm *kvm) 24 { 25 switch (kvm->arch.pmuver) { 27 return GENMASK(9, 0); 28 case ID_DFR0_PERFMON_8_1: 31 return GENMASK(15, 0); 32 default: /* Shouldn't be here, just for sanity */ 33 WARN_ONCE(1, "Unknown PMU version %d\n", kvm->arch.pmuver); 34 return 0; 35 } 36 } 37 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org