Hi Steven, kernel test robot noticed the following build warnings: [auto build test WARNING on kvmarm/next] [also build test WARNING on kvm/queue arm64/for-next/core linus/master v6.11-rc4 next-20240822] [cannot apply to kvm/linux-next] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Steven-Price/KVM-Prepare-for-handling-only-shared-mappings-in-mmu_notifier-events/20240821-235327 base: https://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git next patch link: https://lore.kernel.org/r/20240821153844.60084-19-steven.price%40arm.com patch subject: [PATCH v4 18/43] arm64: RME: Handle realm enter/exit config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20240822/202408222119.6YF3UR6O-lkp@xxxxxxxxx/config) compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project 26670e7fa4f032a019d23d56c6a02926e854e8af) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240822/202408222119.6YF3UR6O-lkp@xxxxxxxxx/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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202408222119.6YF3UR6O-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from arch/arm64/kvm/rme-exit.c:6: In file included from include/linux/kvm_host.h:16: In file included from include/linux/mm.h:2228: include/linux/vmstat.h:500:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 500 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 501 | item]; | ~~~~ include/linux/vmstat.h:507:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 507 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 508 | NR_VM_NUMA_EVENT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~~ include/linux/vmstat.h:514:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] 514 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_" | ~~~~~~~~~~~ ^ ~~~ include/linux/vmstat.h:519:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 519 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 520 | NR_VM_NUMA_EVENT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~~ include/linux/vmstat.h:528:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 528 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 529 | NR_VM_NUMA_EVENT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/kvm/rme-exit.c:61:23: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides] 61 | [ESR_ELx_EC_SYS64] = rec_exit_sys_reg, | ^~~~~~~~~~~~~~~~ arch/arm64/kvm/rme-exit.c:60:27: note: previous initialization is here 60 | [0 ... ESR_ELx_EC_MAX] = rec_exit_reason_notimpl, | ^~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/kvm/rme-exit.c:62:26: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides] 62 | [ESR_ELx_EC_DABT_LOW] = rec_exit_sync_dabt, | ^~~~~~~~~~~~~~~~~~ arch/arm64/kvm/rme-exit.c:60:27: note: previous initialization is here 60 | [0 ... ESR_ELx_EC_MAX] = rec_exit_reason_notimpl, | ^~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/kvm/rme-exit.c:63:26: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides] 63 | [ESR_ELx_EC_IABT_LOW] = rec_exit_sync_iabt | ^~~~~~~~~~~~~~~~~~ arch/arm64/kvm/rme-exit.c:60:27: note: previous initialization is here 60 | [0 ... ESR_ELx_EC_MAX] = rec_exit_reason_notimpl, | ^~~~~~~~~~~~~~~~~~~~~~~ >> arch/arm64/kvm/rme-exit.c:94:6: warning: variable 'top_ipa' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized] 94 | if (realm_is_addr_protected(realm, base) && | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 95 | realm_is_addr_protected(realm, top - 1)) { | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/kvm/rme-exit.c:108:44: note: uninitialized use occurs here 108 | kvm_prepare_memory_fault_exit(vcpu, base, top_ipa - base, false, false, | ^~~~~~~ arch/arm64/kvm/rme-exit.c:94:2: note: remove the 'if' if its condition is always true 94 | if (realm_is_addr_protected(realm, base) && | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 95 | realm_is_addr_protected(realm, top - 1)) { | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >> arch/arm64/kvm/rme-exit.c:94:6: warning: variable 'top_ipa' is used uninitialized whenever '&&' condition is false [-Wsometimes-uninitialized] 94 | if (realm_is_addr_protected(realm, base) && | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/kvm/rme-exit.c:108:44: note: uninitialized use occurs here 108 | kvm_prepare_memory_fault_exit(vcpu, base, top_ipa - base, false, false, | ^~~~~~~ arch/arm64/kvm/rme-exit.c:94:6: note: remove the '&&' if its condition is always true 94 | if (realm_is_addr_protected(realm, base) && | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm64/kvm/rme-exit.c:91:23: note: initialize the variable 'top_ipa' to silence this warning 91 | unsigned long top_ipa; | ^ | = 0 10 warnings generated. vim +94 arch/arm64/kvm/rme-exit.c 58 59 static exit_handler_fn rec_exit_handlers[] = { > 60 [0 ... ESR_ELx_EC_MAX] = rec_exit_reason_notimpl, 61 [ESR_ELx_EC_SYS64] = rec_exit_sys_reg, 62 [ESR_ELx_EC_DABT_LOW] = rec_exit_sync_dabt, 63 [ESR_ELx_EC_IABT_LOW] = rec_exit_sync_iabt 64 }; 65 66 static int rec_exit_psci(struct kvm_vcpu *vcpu) 67 { 68 struct realm_rec *rec = &vcpu->arch.rec; 69 int i; 70 int ret; 71 72 for (i = 0; i < REC_RUN_GPRS; i++) 73 vcpu_set_reg(vcpu, i, rec->run->exit.gprs[i]); 74 75 ret = kvm_smccc_call_handler(vcpu); 76 77 for (i = 0; i < REC_RUN_GPRS; i++) 78 rec->run->enter.gprs[i] = vcpu_get_reg(vcpu, i); 79 80 return ret; 81 } 82 83 static int rec_exit_ripas_change(struct kvm_vcpu *vcpu) 84 { 85 struct kvm *kvm = vcpu->kvm; 86 struct realm *realm = &kvm->arch.realm; 87 struct realm_rec *rec = &vcpu->arch.rec; 88 unsigned long base = rec->run->exit.ripas_base; 89 unsigned long top = rec->run->exit.ripas_top; 90 unsigned long ripas = rec->run->exit.ripas_value & 1; 91 unsigned long top_ipa; 92 int ret = -EINVAL; 93 > 94 if (realm_is_addr_protected(realm, base) && 95 realm_is_addr_protected(realm, top - 1)) { 96 kvm_mmu_topup_memory_cache(&vcpu->arch.mmu_page_cache, 97 kvm_mmu_cache_min_pages(vcpu->arch.hw_mmu)); 98 write_lock(&kvm->mmu_lock); 99 ret = realm_set_ipa_state(vcpu, base, top, ripas, &top_ipa); 100 write_unlock(&kvm->mmu_lock); 101 } 102 103 WARN(ret && ret != -ENOMEM, 104 "Unable to satisfy SET_IPAS for %#lx - %#lx, ripas: %#lx\n", 105 base, top, ripas); 106 107 /* Exit to VMM to complete the change */ > 108 kvm_prepare_memory_fault_exit(vcpu, base, top_ipa - base, false, false, 109 ripas == 1); 110 111 return 0; 112 } 113 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
