_SYSTEM_INFORMATION_CLASS

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
SystemFlagsInformation, // q: SYSTEM_FLAGS_INFORMATION
SystemCallTimeInformation, // 10, not implemented
SystemModuleInformation, // q: RTL_PROCESS_MODULES
SystemLocksInformation,
SystemStackTraceInformation,
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
SystemVdmBopInformation, // 20, not implemented
SystemFileCacheInformation, // q: SYSTEM_FILECACHE_INFORMATION; s (requires SeIncreaseQuotaPrivilege) (info for WorkingSetTypeSystemCache)
SystemPoolTagInformation, // q: SYSTEM_POOLTAG_INFORMATION
SystemInterruptInformation, // q: SYSTEM_INTERRUPT_INFORMATION
SystemDpcBehaviorInformation, // q: SYSTEM_DPC_BEHAVIOR_INFORMATION; s: SYSTEM_DPC_BEHAVIOR_INFORMATION (requires SeLoadDriverPrivilege)
SystemFullMemoryInformation, // not implemented
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
SystemMirrorMemoryInformation, // 30, s (requires license value "Kernel-MemoryMirroringSupported") (requires SeShutdownPrivilege)
SystemPerformanceTraceInformation, // s
SystemObsolete0, // not implemented
SystemExceptionInformation, // q: SYSTEM_EXCEPTION_INFORMATION
SystemCrashDumpStateInformation, // s (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, // 40, s (requires SeDebugPrivilege)
SystemVerifierRemoveDriverInformation, // s (requires SeDebugPrivilege)
SystemProcessorIdleInformation, // q: SYSTEM_PROCESSOR_IDLE_INFORMATION
SystemLegacyDriverInformation, // q: SYSTEM_LEGACY_DRIVER_INFORMATION
SystemCurrentTimeZoneInformation, // q
SystemLookasideInformation, // q: SYSTEM_LOOKASIDE_INFORMATION
SystemTimeSlipNotification, // s (requires SeSystemtimePrivilege)
SystemSessionCreate, // not implemented
SystemSessionDetach, // not implemented
SystemSessionInformation, // not implemented
SystemRangeStartInformation, // 50, q
SystemVerifierInformation, // q: SYSTEM_VERIFIER_INFORMATION; s (requires SeDebugPrivilege)
SystemVerifierThunkExtend, // s (kernel-mode only)
SystemSessionProcessInformation, // q: SYSTEM_SESSION_PROCESS_INFORMATION
SystemLoadGdiDriverInSystemSpace, // s (kernel-mode only) (same as SystemLoadGdiDriverInformation)
SystemNumaProcessorMap, // q
SystemPrefetcherInformation, // q: PREFETCHER_INFORMATION; s: PREFETCHER_INFORMATION // PfSnQueryPrefetcherInformation
SystemExtendedProcessInformation, // q: SYSTEM_PROCESS_INFORMATION
SystemRecommendedSharedDataAlignment, // q
SystemComPlusPackage, // q; s
SystemNumaAvailableMemory, // 60
SystemProcessorPowerInformation, // q: SYSTEM_PROCESSOR_POWER_INFORMATION
SystemEmulationBasicInformation, // q
SystemEmulationProcessorInformation,
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
SystemObjectSecurityMode, // 70, q
SystemWatchdogTimerHandler, // s (kernel-mode only)
SystemWatchdogTimerInformation, // q (kernel-mode only); s (kernel-mode only)
SystemLogicalProcessorInformation, // q: SYSTEM_LOGICAL_PROCESSOR_INFORMATION
SystemWow64SharedInformationObsolete, // not implemented
SystemRegisterFirmwareTableInformationHandler, // s (kernel-mode only)
SystemFirmwareTableInformation, // not implemented
SystemModuleInformationEx, // q: RTL_PROCESS_MODULE_INFORMATION_EX
SystemVerifierTriageInformation, // not implemented
SystemSuperfetchInformation, // q: SUPERFETCH_INFORMATION; s: SUPERFETCH_INFORMATION // PfQuerySuperfetchInformation
SystemMemoryListInformation, // 80, q: SYSTEM_MEMORY_LIST_INFORMATION; s: SYSTEM_MEMORY_LIST_COMMAND (requires SeProfileSingleProcessPrivilege)
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[]
SystemVerifierCancellationInformation, // not implemented // name:wow64:whNT32QuerySystemVerifierCancellationInformation
SystemProcessorPowerInformationEx, // not implemented
SystemRefTraceInformation, // q; s // ObQueryRefTraceInformation
SystemSpecialPoolInformation, // q; s (requires SeDebugPrivilege) // MmSpecialPoolTag, then MmSpecialPoolCatchOverruns != 0
SystemProcessIdInformation, // q: SYSTEM_PROCESS_ID_INFORMATION
SystemErrorPortInformation, // s (requires SeTcbPrivilege)
SystemBootEnvironmentInformation, // 90, q: SYSTEM_BOOT_ENVIRONMENT_INFORMATION
SystemHypervisorInformation, // q; s (kernel-mode only)
SystemVerifierInformationEx, // q; s
SystemTimeZoneInformation, // s (requires SeTimeZonePrivilege)
SystemImageFileExecutionOptionsInformation, // s: SYSTEM_IMAGE_FILE_EXECUTION_OPTIONS_INFORMATION (requires SeTcbPrivilege)
SystemCoverageInformation, // q; s // name:wow64:whNT32QuerySystemCoverageInformation; ExpCovQueryInformation
SystemPrefetchPatchInformation, // not implemented
SystemVerifierFaultsInformation, // s (requires SeDebugPrivilege)
SystemSystemPartitionInformation, // q: SYSTEM_SYSTEM_PARTITION_INFORMATION
SystemSystemDiskInformation, // q: SYSTEM_SYSTEM_DISK_INFORMATION
SystemProcessorPerformanceDistribution, // 100, q: SYSTEM_PROCESSOR_PERFORMANCE_DISTRIBUTION
SystemNumaProximityNodeInformation, // q
SystemDynamicTimeZoneInformation, // q; s (requires SeTimeZonePrivilege)
SystemCodeIntegrityInformation, // q // SeCodeIntegrityQueryInformation
SystemProcessorMicrocodeUpdateInformation, // s
SystemProcessorBrandString, // q // 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 // since WIN7 // KeQueryLogicalProcessorRelationship
SystemProcessorCycleTimeInformation, // q: SYSTEM_PROCESSOR_CYCLE_TIME_INFORMATION[]
SystemStoreInformation, // q; s // SmQueryStoreInformation
SystemRegistryAppendString, // 110, s: SYSTEM_REGISTRY_APPEND_STRING_PARAMETERS
SystemAitSamplingValue, // s: ULONG (requires SeProfileSingleProcessPrivilege)
SystemVhdBootInformation, // q: SYSTEM_VHD_BOOT_INFORMATION
SystemCpuQuotaInformation, // q; s // PsQueryCpuQuotaInformation
SystemNativeBasicInformation, // not implemented
SystemSpare1, // not implemented
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, // 120, q: SYSTEM_FILECACHE_INFORMATION; s (requires SeIncreaseQuotaPrivilege) (info for WorkingSetTypeSystemPtes)
SystemNodeDistanceInformation, // q
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, // since WIN8
SystemBootGraphicsInformation,
SystemScrubPhysicalMemoryInformation,
SystemBadPageInformation,
SystemProcessorProfileControlArea,
SystemCombinePhysicalMemoryInformation, // 130
SystemEntropyInterruptTimingCallback,
SystemConsoleInformation,
SystemPlatformBinaryInformation,
SystemThrottleNotificationInformation,
SystemHypervisorProcessorCountInformation,
SystemDeviceDataInformation,
SystemDeviceDataEnumerationInformation,
SystemMemoryTopologyInformation,
SystemMemoryChannelInformation,
SystemBootLogoInformation, // 140
SystemProcessorPerformanceInformationEx, // since WINBLUE
SystemSpare0,
SystemSecureBootPolicyInformation,
SystemPageFileInformationEx,
SystemSecureBootInformation,
SystemEntropyInterruptTimingRawInformation,
SystemPortableWorkspaceEfiLauncherInformation,
SystemFullProcessInformation, // q: SYSTEM_PROCESS_INFORMATION with SYSTEM_PROCESS_INFORMATION_EXTENSION (requires admin)
SystemKernelDebuggerInformationEx,
SystemBootMetadataInformation, // 150
SystemSoftRebootInformation,
SystemElamCertificateInformation,
SystemOfflineDumpConfigInformation,
SystemProcessorFeaturesInformation,
SystemRegistryReconciliationInformation,
SystemEdidInformation,
MaxSystemInfoClass
} SYSTEM_INFORMATION_CLASS;

typedef enum _SYSTEM_INFORMATION_CLASS
{
SystemBasicInformation = 0x0,
SystemProcessorInformation = 0x1,
SystemPerformanceInformation = 0x2,
SystemTimeOfDayInformation = 0x3,
SystemPathInformation = 0x4,
SystemProcessInformation = 0x5,
SystemCallCountInformation = 0x6,
SystemDeviceInformation = 0x7,
SystemProcessorPerformanceInformation = 0x8,
SystemFlagsInformation = 0x9,
SystemCallTimeInformation = 0xa,
SystemModuleInformation = 0xb,
SystemLocksInformation = 0xc,
SystemStackTraceInformation = 0xd,
SystemPagedPoolInformation = 0xe,
SystemNonPagedPoolInformation = 0xf,
SystemHandleInformation = 0x10,
SystemObjectInformation = 0x11,
SystemPageFileInformation = 0x12,
SystemVdmInstemulInformation = 0x13,
SystemVdmBopInformation = 0x14,
SystemFileCacheInformation = 0x15,
SystemPoolTagInformation = 0x16,
SystemInterruptInformation = 0x17,
SystemDpcBehaviorInformation = 0x18,
SystemFullMemoryInformation = 0x19,
SystemLoadGdiDriverInformation = 0x1a,
SystemUnloadGdiDriverInformation = 0x1b,
SystemTimeAdjustmentInformation = 0x1c,
SystemSummaryMemoryInformation = 0x1d,
SystemMirrorMemoryInformation = 0x1e,
SystemPerformanceTraceInformation = 0x1f,
SystemObsolete0 = 0x20,
SystemExceptionInformation = 0x21,
SystemCrashDumpStateInformation = 0x22,
SystemKernelDebuggerInformation = 0x23,
SystemContextSwitchInformation = 0x24,
SystemRegistryQuotaInformation = 0x25,
SystemExtendServiceTableInformation = 0x26,
SystemPrioritySeperation = 0x27,
SystemVerifierAddDriverInformation = 0x28,
SystemVerifierRemoveDriverInformation = 0x29,
SystemProcessorIdleInformation = 0x2a,
SystemLegacyDriverInformation = 0x2b,
SystemCurrentTimeZoneInformation = 0x2c,
SystemLookasideInformation = 0x2d,
SystemTimeSlipNotification = 0x2e,
SystemSessionCreate = 0x2f,
SystemSessionDetach = 0x30,
SystemSessionInformation = 0x31,
SystemRangeStartInformation = 0x32,
SystemVerifierInformation = 0x33,
SystemVerifierThunkExtend = 0x34,
SystemSessionProcessInformation = 0x35,
SystemLoadGdiDriverInSystemSpace = 0x36,
SystemNumaProcessorMap = 0x37,
SystemPrefetcherInformation = 0x38,
SystemExtendedProcessInformation = 0x39,
SystemRecommendedSharedDataAlignment = 0x3a,
SystemComPlusPackage = 0x3b,
SystemNumaAvailableMemory = 0x3c,
SystemProcessorPowerInformation = 0x3d,
SystemEmulationBasicInformation = 0x3e,
SystemEmulationProcessorInformation = 0x3f,
SystemExtendedHandleInformation = 0x40,
SystemLostDelayedWriteInformation = 0x41,
SystemBigPoolInformation = 0x42,
SystemSessionPoolTagInformation = 0x43,
SystemSessionMappedViewInformation = 0x44,
SystemHotpatchInformation = 0x45,
SystemObjectSecurityMode = 0x46,
SystemWatchdogTimerHandler = 0x47,
SystemWatchdogTimerInformation = 0x48,
SystemLogicalProcessorInformation = 0x49,
SystemWow64SharedInformationObsolete = 0x4a,
SystemRegisterFirmwareTableInformationHandler = 0x4b,
SystemFirmwareTableInformation = 0x4c,
SystemModuleInformationEx = 0x4d,
SystemVerifierTriageInformation = 0x4e,
SystemSuperfetchInformation = 0x4f,
SystemMemoryListInformation = 0x50,
SystemFileCacheInformationEx = 0x51,
SystemThreadPriorityClientIdInformation = 0x52,
SystemProcessorIdleCycleTimeInformation = 0x53,
SystemVerifierCancellationInformation = 0x54,
SystemProcessorPowerInformationEx = 0x55,
SystemRefTraceInformation = 0x56,
SystemSpecialPoolInformation = 0x57,
SystemProcessIdInformation = 0x58,
SystemErrorPortInformation = 0x59,
SystemBootEnvironmentInformation = 0x5a,
SystemHypervisorInformation = 0x5b,
SystemVerifierInformationEx = 0x5c,
SystemTimeZoneInformation = 0x5d,
SystemImageFileExecutionOptionsInformation = 0x5e,
SystemCoverageInformation = 0x5f,
SystemPrefetchPatchInformation = 0x60,
SystemVerifierFaultsInformation = 0x61,
SystemSystemPartitionInformation = 0x62,
SystemSystemDiskInformation = 0x63,
SystemProcessorPerformanceDistribution = 0x64,
SystemNumaProximityNodeInformation = 0x65,
SystemDynamicTimeZoneInformation = 0x66,
SystemCodeIntegrityInformation = 0x67,
SystemProcessorMicrocodeUpdateInformation = 0x68,
SystemProcessorBrandString = 0x69,
SystemVirtualAddressInformation = 0x6a,
SystemLogicalProcessorAndGroupInformation = 0x6b,
SystemProcessorCycleTimeInformation = 0x6c,
SystemStoreInformation = 0x6d,
SystemRegistryAppendString = 0x6e,
SystemAitSamplingValue = 0x6f,
SystemVhdBootInformation = 0x70,
SystemCpuQuotaInformation = 0x71,
SystemNativeBasicInformation = 0x72,
SystemErrorPortTimeouts = 0x73,
SystemLowPriorityIoInformation = 0x74,
SystemBootEntropyInformation = 0x75,
SystemVerifierCountersInformation = 0x76,
SystemPagedPoolInformationEx = 0x77,
SystemSystemPtesInformationEx = 0x78,
SystemNodeDistanceInformation = 0x79,
SystemAcpiAuditInformation = 0x7a,
SystemBasicPerformanceInformation = 0x7b,
SystemQueryPerformanceCounterInformation = 0x7c,
SystemSessionBigPoolInformation = 0x7d,
SystemBootGraphicsInformation = 0x7e,
SystemScrubPhysicalMemoryInformation = 0x7f,
SystemBadPageInformation = 0x80,
SystemProcessorProfileControlArea = 0x81,
SystemCombinePhysicalMemoryInformation = 0x82,
SystemEntropyInterruptTimingInformation = 0x83,
SystemConsoleInformation = 0x84,
SystemPlatformBinaryInformation = 0x85,
SystemThrottleNotificationInformation = 0x86,
SystemHypervisorProcessorCountInformation = 0x87,
SystemDeviceDataInformation = 0x88,
SystemDeviceDataEnumerationInformation = 0x89,
SystemMemoryTopologyInformation = 0x8a,
SystemMemoryChannelInformation = 0x8b,
SystemBootLogoInformation = 0x8c,
SystemProcessorPerformanceInformationEx = 0x8d,
SystemSpare0 = 0x8e,
SystemSecureBootPolicyInformation = 0x8f,
SystemPageFileInformationEx = 0x90,
SystemSecureBootInformation = 0x91,
SystemEntropyInterruptTimingRawInformation = 0x92,
SystemPortableWorkspaceEfiLauncherInformation = 0x93,
SystemFullProcessInformation = 0x94,
SystemKernelDebuggerInformationEx = 0x95,
SystemBootMetadataInformation = 0x96,
SystemSoftRebootInformation = 0x97,
SystemElamCertificateInformation = 0x98,
SystemOfflineDumpConfigInformation = 0x99,
SystemProcessorFeaturesInformation = 0x9a,
SystemRegistryReconciliationInformation = 0x9b,
MaxSystemInfoClass = 0x9c,
} SYSTEM_INFORMATION_CLASS;