Hi Colton, kernel test robot noticed the following build errors:
[auto build test ERROR on 79150772457f4d45e38b842d786240c36bb1f97f] url: https://github.com/intel-lab-lkp/linux/commits/Colton-Lewis/arm64-cpufeature-Add-cpucap-for-HPMN0/20250621-102220 base: 79150772457f4d45e38b842d786240c36bb1f97f patch link: https://lore.kernel.org/r/20250620221326.1261128-19-coltonlewis%40google.com patch subject: [PATCH v2 17/23] KVM: arm64: Account for partitioning in PMCR_EL0 access config: arm64-randconfig-r073-20250622 (https://download.01.org/0day-ci/archive/20250622/[email protected]/config) compiler: aarch64-linux-gcc (GCC) 8.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250622/[email protected]/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 <[email protected]> | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/ All errors (new ones prefixed by >>): In file included from arch/arm64/include/asm/kvm_host.h:32, from include/linux/kvm_host.h:45, from arch/arm64/kvm/sys_regs.c:16: arch/arm64/include/asm/kvm_pmu.h:236:50: warning: 'struct arm_pmu' declared inside parameter list will not be visible outside of this definition or declaration static inline bool kvm_pmu_is_partitioned(struct arm_pmu *pmu) ^~~~~~~ arch/arm64/include/asm/kvm_pmu.h:241:52: warning: 'struct arm_pmu' declared inside parameter list will not be visible outside of this definition or declaration static inline u64 kvm_pmu_host_counter_mask(struct arm_pmu *pmu) ^~~~~~~ arch/arm64/include/asm/kvm_pmu.h:246:53: warning: 'struct arm_pmu' declared inside parameter list will not be visible outside of this definition or declaration static inline u64 kvm_pmu_guest_counter_mask(struct arm_pmu *pmu) ^~~~~~~ arch/arm64/kvm/sys_regs.c:856:6: warning: no previous prototype for 'pmu_access_el0_disabled' [-Wmissing-prototypes] bool pmu_access_el0_disabled(struct kvm_vcpu *vcpu) ^~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/kvm/sys_regs.c: In function 'access_pmu_evtyper': arch/arm64/kvm/sys_regs.c:1076:7: error: implicit declaration of function 'kvm_vcpu_pmu_is_partitioned'; did you mean 'kvm_pmu_is_partitioned'? [-Werror=implicit-function-declaration] if (kvm_vcpu_pmu_is_partitioned(vcpu)) ^~~~~~~~~~~~~~~~~~~~~~~~~~~ kvm_pmu_is_partitioned arch/arm64/kvm/sys_regs.c: In function 'set_pmcr': >> arch/arm64/kvm/sys_regs.c:1271:33: error: dereferencing pointer to >> incomplete type 'struct arm_pmu' new_n <= kvm->arch.arm_pmu->hpmn_max)) ^~ cc1: some warnings being treated as errors vim +1271 arch/arm64/kvm/sys_regs.c 1253 1254 static int set_pmcr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *r, 1255 u64 val) 1256 { 1257 u8 new_n = FIELD_GET(ARMV8_PMU_PMCR_N, val); 1258 struct kvm *kvm = vcpu->kvm; 1259 1260 mutex_lock(&kvm->arch.config_lock); 1261 1262 /* 1263 * The vCPU can't have more counters than the PMU hardware 1264 * implements. Ignore this error to maintain compatibility 1265 * with the existing KVM behavior. 1266 */ 1267 if (!kvm_vm_has_ran_once(kvm) && 1268 !vcpu_has_nv(vcpu) && 1269 new_n <= kvm_arm_pmu_get_max_counters(kvm) && 1270 (!kvm_vcpu_pmu_is_partitioned(vcpu) || > 1271 new_n <= kvm->arch.arm_pmu->hpmn_max)) 1272 kvm->arch.nr_pmu_counters = new_n; 1273 1274 mutex_unlock(&kvm->arch.config_lock); 1275 1276 /* 1277 * Ignore writes to RES0 bits, read only bits that are cleared on 1278 * vCPU reset, and writable bits that KVM doesn't support yet. 1279 * (i.e. only PMCR.N and bits [7:0] are mutable from userspace) 1280 * The LP bit is RES0 when FEAT_PMUv3p5 is not supported on the vCPU. 1281 * But, we leave the bit as it is here, as the vCPU's PMUver might 1282 * be changed later (NOTE: the bit will be cleared on first vCPU run 1283 * if necessary). 1284 */ 1285 val &= ARMV8_PMU_PMCR_MASK; 1286 1287 /* The LC bit is RES1 when AArch32 is not supported */ 1288 if (!kvm_supports_32bit_el0()) 1289 val |= ARMV8_PMU_PMCR_LC; 1290 1291 __vcpu_assign_sys_reg(vcpu, r->reg, val); 1292 kvm_make_request(KVM_REQ_RELOAD_PMU, vcpu); 1293 1294 return 0; 1295 } 1296 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
