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

[Colton Lewis]

kernel test robot <l...@intel.com> writes:

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-...@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-...@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 <l...@intel.com>

| Closes: https://lore.kernel.org/oe-kbuild-all/202512110209.gjvza9ti-...@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

Caused by missing a stub definition for kvm_pmu_event_mask when
reorganizing headers in patch 6: Reorganize PMU functions

Fixed

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

--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki