tree: https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git kvm-arm64/pmu-debug-fixes-5.11 head: 2aa1837246b4399ed85dba448b8dd19b48b95573 commit: 6e73e2ebd0fe89e8ea4c97d37809cf4b05ca7cbe [6/7] KVM: arm64: Upgrade PMU support to ARMv8.4 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 6e73e2ebd0fe89e8ea4c97d37809cf4b05ca7cbe # 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/sys_regs.c: In function 'read_id_reg': 1063 | kvm_vcpu_has_pmu(vcpu) ? ID_DFR0_PERFMON_8_4 : 0); | ^~~~~~~~~~~~~~~~~~~ | ID_DFR0_PERFMON_8_1 arch/arm64/kvm/sys_regs.c:1063:38: note: each undeclared identifier is reported only once for each function it appears in vim +1063 arch/arm64/kvm/sys_regs.c 1021 1022 /* Read a sanitised cpufeature ID register by sys_reg_desc */ 1023 static u64 read_id_reg(const struct kvm_vcpu *vcpu, 1024 struct sys_reg_desc const *r, bool raz) 1025 { 1026 u32 id = sys_reg((u32)r->Op0, (u32)r->Op1, 1027 (u32)r->CRn, (u32)r->CRm, (u32)r->Op2); 1028 u64 val = raz ? 0 : read_sanitised_ftr_reg(id); 1029 1030 switch (id) { 1031 case SYS_ID_AA64PFR0_EL1: 1032 if (!vcpu_has_sve(vcpu)) 1033 val &= ~FEATURE(ID_AA64PFR0_SVE); 1034 val &= ~FEATURE(ID_AA64PFR0_AMU); 1035 val &= ~FEATURE(ID_AA64PFR0_CSV2); 1036 val |= FIELD_PREP(FEATURE(ID_AA64PFR0_CSV2), (u64)vcpu->kvm->arch.pfr0_csv2); 1037 val &= ~FEATURE(ID_AA64PFR0_CSV3); 1038 val |= FIELD_PREP(FEATURE(ID_AA64PFR0_CSV3), (u64)vcpu->kvm->arch.pfr0_csv3); 1039 break; 1040 case SYS_ID_AA64PFR1_EL1: 1041 val &= ~FEATURE(ID_AA64PFR1_MTE); 1042 break; 1043 case SYS_ID_AA64ISAR1_EL1: 1044 if (!vcpu_has_ptrauth(vcpu)) 1045 val &= ~(FEATURE(ID_AA64ISAR1_APA) | 1046 FEATURE(ID_AA64ISAR1_API) | 1047 FEATURE(ID_AA64ISAR1_GPA) | 1048 FEATURE(ID_AA64ISAR1_GPI)); 1049 break; 1050 case SYS_ID_AA64DFR0_EL1: 1051 /* Limit debug to ARMv8.0 */ 1052 val &= ~FEATURE(ID_AA64DFR0_DEBUGVER); 1053 val |= FIELD_PREP(FEATURE(ID_AA64DFR0_DEBUGVER), 6); 1054 /* Limit guests to PMUv3 for ARMv8.4 */ 1055 val = cpuid_feature_cap_perfmon_field(val, 1056 ID_AA64DFR0_PMUVER_SHIFT, 1057 kvm_vcpu_has_pmu(vcpu) ? ID_AA64DFR0_PMUVER_8_4 : 0); 1058 break; 1059 case SYS_ID_DFR0_EL1: 1060 /* Limit guests to PMUv3 for ARMv8.4 */ 1061 val = cpuid_feature_cap_perfmon_field(val, 1062 ID_DFR0_PERFMON_SHIFT, 1064 break; 1065 } 1066 1067 return val; 1068 } 1069 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org