Re: [PATCH v5 11/24] KVM: arm64: Writethrough trapped PMEVTYPER register

kernel test robot
2025-12-10T18:31:50Z

Hi Colton,

kernel test robot noticed the following build errors:

[auto build test ERROR on ac3fd01e4c1efce8f2c054cdeb2ddd2fc0fb150d]

url: https://github.com/intel-lab-lkp/linux/commits/Colton-Lewis/arm64-cpufeature-Add-cpucap-for-HPMN0/20251210-055309
base: ac3fd01e4c1efce8f2c054cdeb2ddd2fc0fb150d
patch link: https://lore.kernel.org/r/20251209205121.1871534-12-coltonlewis%40google.com
patch subject: [PATCH v5 11/24] KVM: arm64: Writethrough trapped PMEVTYPER register
config: arm64-randconfig-001-20251210 (https://download.01.org/0day-ci/archive/20251211/202512110209.GjVZa9ti-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 14.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251211/202512110209.GjVZa9ti-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202512110209.GjVZa9ti-lkp@intel.com/

All errors (new ones prefixed by >>):

arch/arm64/kvm/sys_regs.c: In function 'writethrough_pmevtyper':
>> arch/arm64/kvm/sys_regs.c:1183:34: error: implicit declaration of function 'kvm_pmu_event_mask'; did you mean 'kvm_pmu_evtyper_mask'? [-Wimplicit-function-declaration]
1183 | eventsel = val & kvm_pmu_event_mask(vcpu->kvm);
| ^~~~~~~~~~~~~~~~~~
| kvm_pmu_evtyper_mask

vim +1183 arch/arm64/kvm/sys_regs.c

1168
1169 static bool writethrough_pmevtyper(struct kvm_vcpu *vcpu, struct sys_reg_params *p,
1170 u64 reg, u64 idx)
1171 {
1172 u64 eventsel;
1173 u64 val = p->regval;
1174 u64 evtyper_set = ARMV8_PMU_EXCLUDE_EL0 |
1175 ARMV8_PMU_EXCLUDE_EL1;
1176 u64 evtyper_clr = ARMV8_PMU_INCLUDE_EL2;
1177
1178 __vcpu_assign_sys_reg(vcpu, reg, val);
1179
1180 if (idx == ARMV8_PMU_CYCLE_IDX)
1181 eventsel = ARMV8_PMUV3_PERFCTR_CPU_CYCLES;
1182 else
> 1183 eventsel = val & kvm_pmu_event_mask(vcpu->kvm);
1184
1185 if (vcpu->kvm->arch.pmu_filter &&
1186 !test_bit(eventsel, vcpu->kvm->arch.pmu_filter))
1187 val |= evtyper_set;
1188
1189 val &= ~evtyper_clr;
1190
1191 if (idx == ARMV8_PMU_CYCLE_IDX)
1192 write_pmccfiltr(val);
1193 else
1194 write_pmevtypern(idx, val);
1195
1196 return true;
1197 }
1198

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