#ifndef _NTEXAPI_H
// rev
// private
typedef enum _SYSTEM_INFORMATION_CLASS
{
    SystemBasicInformation, // q: SYSTEM_BASIC_INFORMATION
    SystemProcessorInformation, // q: SYSTEM_PROCESSOR_INFORMATION
    SystemPerformanceInformation, // q: SYSTEM_PERFORMANCE_INFORMATION
    SystemTimeOfDayInformation, // q: SYSTEM_TIMEOFDAY_INFORMATION
    SystemPathInformation, // not implemented
    SystemProcessInformation, // q: SYSTEM_PROCESS_INFORMATION
    SystemCallCountInformation, // q: SYSTEM_CALL_COUNT_INFORMATION
    SystemDeviceInformation, // q: SYSTEM_DEVICE_INFORMATION
    SystemProcessorPerformanceInformation, // q: SYSTEM_PROCESSOR_PERFORMANCE_INFORMATION (EX in: USHORT ProcessorGroup)
    SystemFlagsInformation, // q: SYSTEM_FLAGS_INFORMATION
    SystemCallTimeInformation, // not implemented // SYSTEM_CALL_TIME_INFORMATION // 10
    SystemModuleInformation, // q: RTL_PROCESS_MODULES
    SystemLocksInformation, // q: RTL_PROCESS_LOCKS
    SystemStackTraceInformation, // q: RTL_PROCESS_BACKTRACES
    SystemPagedPoolInformation, // not implemented
    SystemNonPagedPoolInformation, // not implemented
    SystemHandleInformation, // q: SYSTEM_HANDLE_INFORMATION
    SystemObjectInformation, // q: SYSTEM_OBJECTTYPE_INFORMATION mixed with SYSTEM_OBJECT_INFORMATION
    SystemPageFileInformation, // q: SYSTEM_PAGEFILE_INFORMATION
    SystemVdmInstemulInformation, // q: SYSTEM_VDM_INSTEMUL_INFO
    SystemVdmBopInformation, // not implemented // 20
    SystemFileCacheInformation, // q: SYSTEM_FILECACHE_INFORMATION; s (requires SeIncreaseQuotaPrivilege) (info for WorkingSetTypeSystemCache)
    SystemPoolTagInformation, // q: SYSTEM_POOLTAG_INFORMATION
    SystemInterruptInformation, // q: SYSTEM_INTERRUPT_INFORMATION (EX in: USHORT ProcessorGroup)
    SystemDpcBehaviorInformation, // q: SYSTEM_DPC_BEHAVIOR_INFORMATION; s: SYSTEM_DPC_BEHAVIOR_INFORMATION (requires SeLoadDriverPrivilege)
    SystemFullMemoryInformation, // not implemented // SYSTEM_MEMORY_USAGE_INFORMATION
    SystemLoadGdiDriverInformation, // s (kernel-mode only)
    SystemUnloadGdiDriverInformation, // s (kernel-mode only)
    SystemTimeAdjustmentInformation, // q: SYSTEM_QUERY_TIME_ADJUST_INFORMATION; s: SYSTEM_SET_TIME_ADJUST_INFORMATION (requires SeSystemtimePrivilege)
    SystemSummaryMemoryInformation, // not implemented // SYSTEM_MEMORY_USAGE_INFORMATION
    SystemMirrorMemoryInformation, // s (requires license value "Kernel-MemoryMirroringSupported") (requires SeShutdownPrivilege) // 30
    SystemPerformanceTraceInformation, // q; s: (type depends on EVENT_TRACE_INFORMATION_CLASS)
    SystemObsolete0, // not implemented
    SystemExceptionInformation, // q: SYSTEM_EXCEPTION_INFORMATION
    SystemCrashDumpStateInformation, // s: SYSTEM_CRASH_DUMP_STATE_INFORMATION (requires SeDebugPrivilege)
    SystemKernelDebuggerInformation, // q: SYSTEM_KERNEL_DEBUGGER_INFORMATION
    SystemContextSwitchInformation, // q: SYSTEM_CONTEXT_SWITCH_INFORMATION
    SystemRegistryQuotaInformation, // q: SYSTEM_REGISTRY_QUOTA_INFORMATION; s (requires SeIncreaseQuotaPrivilege)
    SystemExtendServiceTableInformation, // s (requires SeLoadDriverPrivilege) // loads win32k only
    SystemPrioritySeperation, // s (requires SeTcbPrivilege)
    SystemVerifierAddDriverInformation, // s (requires SeDebugPrivilege) // 40
    SystemVerifierRemoveDriverInformation, // s (requires SeDebugPrivilege)
    SystemProcessorIdleInformation, // q: SYSTEM_PROCESSOR_IDLE_INFORMATION (EX in: USHORT ProcessorGroup)
    SystemLegacyDriverInformation, // q: SYSTEM_LEGACY_DRIVER_INFORMATION
    SystemCurrentTimeZoneInformation, // q; s: RTL_TIME_ZONE_INFORMATION
    SystemLookasideInformation, // q: SYSTEM_LOOKASIDE_INFORMATION
    SystemTimeSlipNotification, // s: HANDLE (NtCreateEvent) (requires SeSystemtimePrivilege)
    SystemSessionCreate, // not implemented
    SystemSessionDetach, // not implemented
    SystemSessionInformation, // not implemented (SYSTEM_SESSION_INFORMATION)
    SystemRangeStartInformation, // q: SYSTEM_RANGE_START_INFORMATION // 50
    SystemVerifierInformation, // q: SYSTEM_VERIFIER_INFORMATION; s (requires SeDebugPrivilege)
    SystemVerifierThunkExtend, // s (kernel-mode only)
    SystemSessionProcessInformation, // q: SYSTEM_SESSION_PROCESS_INFORMATION
    SystemLoadGdiDriverInSystemSpace, // s: SYSTEM_GDI_DRIVER_INFORMATION (kernel-mode only) (same as SystemLoadGdiDriverInformation)
    SystemNumaProcessorMap, // q: SYSTEM_NUMA_INFORMATION
    SystemPrefetcherInformation, // q; s: PREFETCHER_INFORMATION // PfSnQueryPrefetcherInformation
    SystemExtendedProcessInformation, // q: SYSTEM_PROCESS_INFORMATION
    SystemRecommendedSharedDataAlignment, // q: ULONG // KeGetRecommendedSharedDataAlignment
    SystemComPlusPackage, // q; s: ULONG
    SystemNumaAvailableMemory, // q: SYSTEM_NUMA_INFORMATION // 60
    SystemProcessorPowerInformation, // q: SYSTEM_PROCESSOR_POWER_INFORMATION (EX in: USHORT ProcessorGroup)
    SystemEmulationBasicInformation, // q: SYSTEM_BASIC_INFORMATION
    SystemEmulationProcessorInformation, // q: SYSTEM_PROCESSOR_INFORMATION
    SystemExtendedHandleInformation, // q: SYSTEM_HANDLE_INFORMATION_EX
    SystemLostDelayedWriteInformation, // q: ULONG
    SystemBigPoolInformation, // q: SYSTEM_BIGPOOL_INFORMATION
    SystemSessionPoolTagInformation, // q: SYSTEM_SESSION_POOLTAG_INFORMATION
    SystemSessionMappedViewInformation, // q: SYSTEM_SESSION_MAPPED_VIEW_INFORMATION
    SystemHotpatchInformation, // q; s: SYSTEM_HOTPATCH_CODE_INFORMATION
    SystemObjectSecurityMode, // q: ULONG // 70
    SystemWatchdogTimerHandler, // s: SYSTEM_WATCHDOG_HANDLER_INFORMATION // (kernel-mode only)
    SystemWatchdogTimerInformation, // q: SYSTEM_WATCHDOG_TIMER_INFORMATION // (kernel-mode only)
    SystemLogicalProcessorInformation, // q: SYSTEM_LOGICAL_PROCESSOR_INFORMATION (EX in: USHORT ProcessorGroup)
    SystemWow64SharedInformationObsolete, // not implemented
    SystemRegisterFirmwareTableInformationHandler, // s: SYSTEM_FIRMWARE_TABLE_HANDLER // (kernel-mode only)
    SystemFirmwareTableInformation, // SYSTEM_FIRMWARE_TABLE_INFORMATION
    SystemModuleInformationEx, // q: RTL_PROCESS_MODULE_INFORMATION_EX
    SystemVerifierTriageInformation, // not implemented
    SystemSuperfetchInformation, // q; s: SUPERFETCH_INFORMATION // PfQuerySuperfetchInformation
    SystemMemoryListInformation, // q: SYSTEM_MEMORY_LIST_INFORMATION; s: SYSTEM_MEMORY_LIST_COMMAND (requires SeProfileSingleProcessPrivilege) // 80
    SystemFileCacheInformationEx, // q: SYSTEM_FILECACHE_INFORMATION; s (requires SeIncreaseQuotaPrivilege) (same as SystemFileCacheInformation)
    SystemThreadPriorityClientIdInformation, // s: SYSTEM_THREAD_CID_PRIORITY_INFORMATION (requires SeIncreaseBasePriorityPrivilege)
    SystemProcessorIdleCycleTimeInformation, // q: SYSTEM_PROCESSOR_IDLE_CYCLE_TIME_INFORMATION[] (EX in: USHORT ProcessorGroup)
    SystemVerifierCancellationInformation, // SYSTEM_VERIFIER_CANCELLATION_INFORMATION // name:wow64:whNT32QuerySystemVerifierCancellationInformation
    SystemProcessorPowerInformationEx, // not implemented
    SystemRefTraceInformation, // q; s: SYSTEM_REF_TRACE_INFORMATION // ObQueryRefTraceInformation
    SystemSpecialPoolInformation, // q; s: SYSTEM_SPECIAL_POOL_INFORMATION (requires SeDebugPrivilege) // MmSpecialPoolTag, then MmSpecialPoolCatchOverruns != 0
    SystemProcessIdInformation, // q: SYSTEM_PROCESS_ID_INFORMATION
    SystemErrorPortInformation, // s (requires SeTcbPrivilege)
    SystemBootEnvironmentInformation, // q: SYSTEM_BOOT_ENVIRONMENT_INFORMATION // 90
    SystemHypervisorInformation, // q: SYSTEM_HYPERVISOR_QUERY_INFORMATION
    SystemVerifierInformationEx, // q; s: SYSTEM_VERIFIER_INFORMATION_EX
    SystemTimeZoneInformation, // q; s: RTL_TIME_ZONE_INFORMATION (requires SeTimeZonePrivilege)
    SystemImageFileExecutionOptionsInformation, // s: SYSTEM_IMAGE_FILE_EXECUTION_OPTIONS_INFORMATION (requires SeTcbPrivilege)
    SystemCoverageInformation, // q: COVERAGE_MODULES s: COVERAGE_MODULE_REQUEST // ExpCovQueryInformation (requires SeDebugPrivilege)
    SystemPrefetchPatchInformation, // SYSTEM_PREFETCH_PATCH_INFORMATION
    SystemVerifierFaultsInformation, // s: SYSTEM_VERIFIER_FAULTS_INFORMATION (requires SeDebugPrivilege)
    SystemSystemPartitionInformation, // q: SYSTEM_SYSTEM_PARTITION_INFORMATION
    SystemSystemDiskInformation, // q: SYSTEM_SYSTEM_DISK_INFORMATION
    SystemProcessorPerformanceDistribution, // q: SYSTEM_PROCESSOR_PERFORMANCE_DISTRIBUTION (EX in: USHORT ProcessorGroup) // 100
    SystemNumaProximityNodeInformation, // q; s: SYSTEM_NUMA_PROXIMITY_MAP
    SystemDynamicTimeZoneInformation, // q; s: RTL_DYNAMIC_TIME_ZONE_INFORMATION (requires SeTimeZonePrivilege)
    SystemCodeIntegrityInformation, // q: SYSTEM_CODEINTEGRITY_INFORMATION // SeCodeIntegrityQueryInformation
    SystemProcessorMicrocodeUpdateInformation, // s: SYSTEM_PROCESSOR_MICROCODE_UPDATE_INFORMATION
    SystemProcessorBrandString, // q: CHAR[] // HaliQuerySystemInformation -> HalpGetProcessorBrandString, info class 23
    SystemVirtualAddressInformation, // q: SYSTEM_VA_LIST_INFORMATION[]; s: SYSTEM_VA_LIST_INFORMATION[] (requires SeIncreaseQuotaPrivilege) // MmQuerySystemVaInformation
    SystemLogicalProcessorAndGroupInformation, // q: SYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX (EX in: LOGICAL_PROCESSOR_RELATIONSHIP RelationshipType) // since WIN7 // KeQueryLogicalProcessorRelationship
    SystemProcessorCycleTimeInformation, // q: SYSTEM_PROCESSOR_CYCLE_TIME_INFORMATION[] (EX in: USHORT ProcessorGroup)
    SystemStoreInformation, // q; s: SYSTEM_STORE_INFORMATION (requires SeProfileSingleProcessPrivilege) // SmQueryStoreInformation
    SystemRegistryAppendString, // s: SYSTEM_REGISTRY_APPEND_STRING_PARAMETERS // 110
    SystemAitSamplingValue, // s: ULONG (requires SeProfileSingleProcessPrivilege)
    SystemVhdBootInformation, // q: SYSTEM_VHD_BOOT_INFORMATION
    SystemCpuQuotaInformation, // q; s: PS_CPU_QUOTA_QUERY_INFORMATION
    SystemNativeBasicInformation, // q: SYSTEM_BASIC_INFORMATION
    SystemErrorPortTimeouts, // SYSTEM_ERROR_PORT_TIMEOUTS
    SystemLowPriorityIoInformation, // q: SYSTEM_LOW_PRIORITY_IO_INFORMATION
    SystemTpmBootEntropyInformation, // q: TPM_BOOT_ENTROPY_NT_RESULT // ExQueryTpmBootEntropyInformation
    SystemVerifierCountersInformation, // q: SYSTEM_VERIFIER_COUNTERS_INFORMATION
    SystemPagedPoolInformationEx, // q: SYSTEM_FILECACHE_INFORMATION; s (requires SeIncreaseQuotaPrivilege) (info for WorkingSetTypePagedPool)
    SystemSystemPtesInformationEx, // q: SYSTEM_FILECACHE_INFORMATION; s (requires SeIncreaseQuotaPrivilege) (info for WorkingSetTypeSystemPtes) // 120
    SystemNodeDistanceInformation, // q: USHORT[4*NumaNodes] // (EX in: USHORT NodeNumber)
    SystemAcpiAuditInformation, // q: SYSTEM_ACPI_AUDIT_INFORMATION // HaliQuerySystemInformation -> HalpAuditQueryResults, info class 26
    SystemBasicPerformanceInformation, // q: SYSTEM_BASIC_PERFORMANCE_INFORMATION // name:wow64:whNtQuerySystemInformation_SystemBasicPerformanceInformation
    SystemQueryPerformanceCounterInformation, // q: SYSTEM_QUERY_PERFORMANCE_COUNTER_INFORMATION // since WIN7 SP1
    SystemSessionBigPoolInformation, // q: SYSTEM_SESSION_POOLTAG_INFORMATION // since WIN8
    SystemBootGraphicsInformation, // q; s: SYSTEM_BOOT_GRAPHICS_INFORMATION (kernel-mode only)
    SystemScrubPhysicalMemoryInformation, // q; s: MEMORY_SCRUB_INFORMATION
    SystemBadPageInformation,
    SystemProcessorProfileControlArea, // q; s: SYSTEM_PROCESSOR_PROFILE_CONTROL_AREA
    SystemCombinePhysicalMemoryInformation, // s: MEMORY_COMBINE_INFORMATION, MEMORY_COMBINE_INFORMATION_EX, MEMORY_COMBINE_INFORMATION_EX2 // 130
    SystemEntropyInterruptTimingInformation, // q; s: SYSTEM_ENTROPY_TIMING_INFORMATION
    SystemConsoleInformation, // q; s: SYSTEM_CONSOLE_INFORMATION
    SystemPlatformBinaryInformation, // q: SYSTEM_PLATFORM_BINARY_INFORMATION (requires SeTcbPrivilege)
    SystemPolicyInformation, // q: SYSTEM_POLICY_INFORMATION (Warbird/Encrypt/Decrypt/Execute)
    SystemHypervisorProcessorCountInformation, // q: SYSTEM_HYPERVISOR_PROCESSOR_COUNT_INFORMATION
    SystemDeviceDataInformation, // q: SYSTEM_DEVICE_DATA_INFORMATION
    SystemDeviceDataEnumerationInformation, // q: SYSTEM_DEVICE_DATA_INFORMATION
    SystemMemoryTopologyInformation, // q: SYSTEM_MEMORY_TOPOLOGY_INFORMATION
    SystemMemoryChannelInformation, // q: SYSTEM_MEMORY_CHANNEL_INFORMATION
    SystemBootLogoInformation, // q: SYSTEM_BOOT_LOGO_INFORMATION // 140
    SystemProcessorPerformanceInformationEx, // q: SYSTEM_PROCESSOR_PERFORMANCE_INFORMATION_EX // (EX in: USHORT ProcessorGroup) // since WINBLUE
    SystemCriticalProcessErrorLogInformation,
    SystemSecureBootPolicyInformation, // q: SYSTEM_SECUREBOOT_POLICY_INFORMATION
    SystemPageFileInformationEx, // q: SYSTEM_PAGEFILE_INFORMATION_EX
    SystemSecureBootInformation, // q: SYSTEM_SECUREBOOT_INFORMATION
    SystemEntropyInterruptTimingRawInformation,
    SystemPortableWorkspaceEfiLauncherInformation, // q: SYSTEM_PORTABLE_WORKSPACE_EFI_LAUNCHER_INFORMATION
    SystemFullProcessInformation, // q: SYSTEM_PROCESS_INFORMATION with SYSTEM_PROCESS_INFORMATION_EXTENSION (requires admin)
    SystemKernelDebuggerInformationEx, // q: SYSTEM_KERNEL_DEBUGGER_INFORMATION_EX
    SystemBootMetadataInformation, // 150
    SystemSoftRebootInformation, // q: ULONG
    SystemElamCertificateInformation, // s: SYSTEM_ELAM_CERTIFICATE_INFORMATION
    SystemOfflineDumpConfigInformation, // q: OFFLINE_CRASHDUMP_CONFIGURATION_TABLE_V2
    SystemProcessorFeaturesInformation, // q: SYSTEM_PROCESSOR_FEATURES_INFORMATION
    SystemRegistryReconciliationInformation, // s: NULL (requires admin) (flushes registry hives)
    SystemEdidInformation, // q: SYSTEM_EDID_INFORMATION
    SystemManufacturingInformation, // q: SYSTEM_MANUFACTURING_INFORMATION // since THRESHOLD
    SystemEnergyEstimationConfigInformation, // q: SYSTEM_ENERGY_ESTIMATION_CONFIG_INFORMATION
    SystemHypervisorDetailInformation, // q: SYSTEM_HYPERVISOR_DETAIL_INFORMATION
    SystemProcessorCycleStatsInformation, // q: SYSTEM_PROCESSOR_CYCLE_STATS_INFORMATION (EX in: USHORT ProcessorGroup) // 160
    SystemVmGenerationCountInformation,
    SystemTrustedPlatformModuleInformation, // q: SYSTEM_TPM_INFORMATION
    SystemKernelDebuggerFlags, // SYSTEM_KERNEL_DEBUGGER_FLAGS
    SystemCodeIntegrityPolicyInformation, // q; s: SYSTEM_CODEINTEGRITYPOLICY_INFORMATION
    SystemIsolatedUserModeInformation, // q: SYSTEM_ISOLATED_USER_MODE_INFORMATION
    SystemHardwareSecurityTestInterfaceResultsInformation,
    SystemSingleModuleInformation, // q: SYSTEM_SINGLE_MODULE_INFORMATION
    SystemAllowedCpuSetsInformation, // s: SYSTEM_WORKLOAD_ALLOWED_CPU_SET_INFORMATION
    SystemVsmProtectionInformation, // q: SYSTEM_VSM_PROTECTION_INFORMATION (previously SystemDmaProtectionInformation)
    SystemInterruptCpuSetsInformation, // q: SYSTEM_INTERRUPT_CPU_SET_INFORMATION // 170
    SystemSecureBootPolicyFullInformation, // q: SYSTEM_SECUREBOOT_POLICY_FULL_INFORMATION
    SystemCodeIntegrityPolicyFullInformation,
    SystemAffinitizedInterruptProcessorInformation, // (requires SeIncreaseBasePriorityPrivilege)
    SystemRootSiloInformation, // q: SYSTEM_ROOT_SILO_INFORMATION
    SystemCpuSetInformation, // q: SYSTEM_CPU_SET_INFORMATION // since THRESHOLD2
    SystemCpuSetTagInformation, // q: SYSTEM_CPU_SET_TAG_INFORMATION
    SystemWin32WerStartCallout,
    SystemSecureKernelProfileInformation, // q: SYSTEM_SECURE_KERNEL_HYPERGUARD_PROFILE_INFORMATION
    SystemCodeIntegrityPlatformManifestInformation, // q: SYSTEM_SECUREBOOT_PLATFORM_MANIFEST_INFORMATION // since REDSTONE
    SystemInterruptSteeringInformation, // q: in: SYSTEM_INTERRUPT_STEERING_INFORMATION_INPUT, out: SYSTEM_INTERRUPT_STEERING_INFORMATION_OUTPUT // NtQuerySystemInformationEx // 180
    SystemSupportedProcessorArchitectures, // p: in opt: HANDLE, out: SYSTEM_SUPPORTED_PROCESSOR_ARCHITECTURES_INFORMATION[] // NtQuerySystemInformationEx
    SystemMemoryUsageInformation, // q: SYSTEM_MEMORY_USAGE_INFORMATION
    SystemCodeIntegrityCertificateInformation, // q: SYSTEM_CODEINTEGRITY_CERTIFICATE_INFORMATION
    SystemPhysicalMemoryInformation, // q: SYSTEM_PHYSICAL_MEMORY_INFORMATION // since REDSTONE2
    SystemControlFlowTransition, // (Warbird/Encrypt/Decrypt/Execute)
    SystemKernelDebuggingAllowed, // s: ULONG
    SystemActivityModerationExeState, // SYSTEM_ACTIVITY_MODERATION_EXE_STATE
    SystemActivityModerationUserSettings, // SYSTEM_ACTIVITY_MODERATION_USER_SETTINGS
    SystemCodeIntegrityPoliciesFullInformation,
    SystemCodeIntegrityUnlockInformation, // SYSTEM_CODEINTEGRITY_UNLOCK_INFORMATION // 190
    SystemIntegrityQuotaInformation,
    SystemFlushInformation, // q: SYSTEM_FLUSH_INFORMATION
    SystemProcessorIdleMaskInformation, // q: ULONG_PTR[ActiveGroupCount] // since REDSTONE3
    SystemSecureDumpEncryptionInformation,
    SystemWriteConstraintInformation, // SYSTEM_WRITE_CONSTRAINT_INFORMATION
    SystemKernelVaShadowInformation, // SYSTEM_KERNEL_VA_SHADOW_INFORMATION
    SystemHypervisorSharedPageInformation, // SYSTEM_HYPERVISOR_SHARED_PAGE_INFORMATION // since REDSTONE4
    SystemFirmwareBootPerformanceInformation,
    SystemCodeIntegrityVerificationInformation, // SYSTEM_CODEINTEGRITYVERIFICATION_INFORMATION
    SystemFirmwarePartitionInformation, // SYSTEM_FIRMWARE_PARTITION_INFORMATION // 200
    SystemSpeculationControlInformation, // SYSTEM_SPECULATION_CONTROL_INFORMATION // (CVE-2017-5715) REDSTONE3 and above.
    SystemDmaGuardPolicyInformation, // SYSTEM_DMA_GUARD_POLICY_INFORMATION
    SystemEnclaveLaunchControlInformation, // SYSTEM_ENCLAVE_LAUNCH_CONTROL_INFORMATION
    SystemWorkloadAllowedCpuSetsInformation, // SYSTEM_WORKLOAD_ALLOWED_CPU_SET_INFORMATION // since REDSTONE5
    SystemCodeIntegrityUnlockModeInformation, // SYSTEM_CODEINTEGRITY_UNLOCK_INFORMATION
    SystemLeapSecondInformation, // SYSTEM_LEAP_SECOND_INFORMATION
    SystemFlags2Information, // q: SYSTEM_FLAGS_INFORMATION
    SystemSecurityModelInformation, // SYSTEM_SECURITY_MODEL_INFORMATION // since 19H1
    SystemCodeIntegritySyntheticCacheInformation,
    SystemFeatureConfigurationInformation, // SYSTEM_FEATURE_CONFIGURATION_INFORMATION // since 20H1 // 210
    SystemFeatureConfigurationSectionInformation, // SYSTEM_FEATURE_CONFIGURATION_SECTIONS_INFORMATION
    SystemFeatureUsageSubscriptionInformation, // SYSTEM_FEATURE_USAGE_SUBSCRIPTION_DETAILS
    SystemSecureSpeculationControlInformation, // SECURE_SPECULATION_CONTROL_INFORMATION
    SystemSpacesBootInformation, // since 20H2
    SystemFwRamdiskInformation, // SYSTEM_FIRMWARE_RAMDISK_INFORMATION
    SystemWheaIpmiHardwareInformation,
    SystemDifSetRuleClassInformation, // SYSTEM_DIF_VOLATILE_INFORMATION
    SystemDifClearRuleClassInformation,
    SystemDifApplyPluginVerificationOnDriver, // SYSTEM_DIF_PLUGIN_DRIVER_INFORMATION
    SystemDifRemovePluginVerificationOnDriver, // SYSTEM_DIF_PLUGIN_DRIVER_INFORMATION // 220
    SystemShadowStackInformation, // SYSTEM_SHADOW_STACK_INFORMATION
    SystemBuildVersionInformation, // q: in: ULONG (LayerNumber), out: SYSTEM_BUILD_VERSION_INFORMATION // NtQuerySystemInformationEx // 222
    SystemPoolLimitInformation, // SYSTEM_POOL_LIMIT_INFORMATION (requires SeIncreaseQuotaPrivilege)
    SystemCodeIntegrityAddDynamicStore,
    SystemCodeIntegrityClearDynamicStores,
    SystemDifPoolTrackingInformation,
    SystemPoolZeroingInformation, // q: SYSTEM_POOL_ZEROING_INFORMATION
    SystemDpcWatchdogInformation, // q; s: SYSTEM_DPC_WATCHDOG_CONFIGURATION_INFORMATION
    SystemDpcWatchdogInformation2, // q; s: SYSTEM_DPC_WATCHDOG_CONFIGURATION_INFORMATION_V2
    SystemSupportedProcessorArchitectures2, // q: in opt: HANDLE, out: SYSTEM_SUPPORTED_PROCESSOR_ARCHITECTURES_INFORMATION[] // NtQuerySystemInformationEx // 230
    SystemSingleProcessorRelationshipInformation, // q: SYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX // (EX in: PROCESSOR_NUMBER Processor)
    SystemXfgCheckFailureInformation, // q: SYSTEM_XFG_FAILURE_INFORMATION
    SystemIommuStateInformation, // SYSTEM_IOMMU_STATE_INFORMATION // since 22H1
    SystemHypervisorMinrootInformation, // SYSTEM_HYPERVISOR_MINROOT_INFORMATION
    SystemHypervisorBootPagesInformation, // SYSTEM_HYPERVISOR_BOOT_PAGES_INFORMATION
    SystemPointerAuthInformation, // SYSTEM_POINTER_AUTH_INFORMATION
    SystemSecureKernelDebuggerInformation,
    SystemOriginalImageFeatureInformation, // q: in: SYSTEM_ORIGINAL_IMAGE_FEATURE_INFORMATION_INPUT, out: SYSTEM_ORIGINAL_IMAGE_FEATURE_INFORMATION_OUTPUT // NtQuerySystemInformationEx
    MaxSystemInfoClass
} SYSTEM_INFORMATION_CLASS;
View code on GitHubEnumeration type SYSTEM_INFORMATION_CLASS defines information classes for a lot of system settings
This type is used with function
NtQuerySystemInformation and NtSetSystemInformation.
For detailed information see descriptions of structures associated with information classes below.
QuerySYSTEM_BASIC_INFORMATIONQuerySYSTEM_PROCESSOR_INFORMATION0x138 GET
0x020 GET
QuerySTATUS_NOT_IMPLEMENTEDSystem path is available via structure KUSER_SHARED_DATA
QuerySYSTEM_PROCESS_INFORMATIONQuerySYSTEM_CALL_COUNT_INFORMATION0x018 GET SystemConfigurationInformation
QuerySYSTEM_PROCESSOR_PERFORMANCE_INFORMATION0x004 GET SET
NOT_IMPLEMENTED
QuerySYSTEM_MODULE_INFORMATION0x028+ GET
0x05C GET
0x01C GET checked build only
0x01C GET checked build only
QuerySYSTEM_HANDLE_INFORMATIONQuerySYSTEM_OBJECT_INFORMATIONQuerySYSTEM_PAGEFILE_INFORMATION0x088 GET
INVALID_INFO_CLASS
0x00C, 0x024 GET SET
0x020+ GET
0x018 GET
0x014 GET SET
0x014 GET checked build only
0x018 SET
0x004 SET
QuerySYSTEM_QUERY_TIME_ADJUST_INFORMATIONSetSYSTEM_SET_TIME_ADJUST_INFORMATION0x014 GET checked build only
???? (C0000005) GET checked build only
0xB66 GET checked build only
0x004 GET
0x010 GET
0x004 GET
0x002 GET
0x030 GET
QuerySYSTEM_REGISTRY_QUOTA_INFORMATIONSetSYSTEM_REGISTRY_QUOTA_INFORMATIONSetSYSTEM_LOAD_IMAGE_INFORMATION0x004 SET
NOT_IMPLEMENTED, GET
NOT_IMPLEMENTED, GET
INVALID_INFO_CLASS
INVALID_INFO_CLASS
0x0AC GET
0x000 GET