SYSTEM_INFORMATION_CLASS - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers
#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, // SYSTEM_BAD_PAGE_INFORMATION
    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
    SystemMemoryNumaInformation,
    SystemMemoryNumaPerformanceInformation, // SYSTEM_MEMORY_NUMA_PERFORMANCE_INFORMATION_INPUT, SYSTEM_MEMORY_NUMA_PERFORMANCE_INFORMATION_OUTPUT // since 24H2 // 240
    SystemCodeIntegritySignedPoliciesFullInformation,
    SystemSecureSecretsInformation,
    SystemTrustedAppsRuntimeInformation, // SYSTEM_TRUSTEDAPPS_RUNTIME_INFORMATION
    SystemBadPageInformationEx, // SYSTEM_BAD_PAGE_INFORMATION
    SystemResourceDeadlockTimeout,
    SystemBreakOnContextUnwindFailureInformation,
    SystemOslRamdiskInformation, // SYSTEM_OSL_RAMDISK_INFORMATION
    MaxSystemInfoClass
} SYSTEM_INFORMATION_CLASS;

#endif

View code on GitHub

Enumeration 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.

SystemBasicInformation

SystemProcessorInformation

SystemPerformanceInformation

0x138 GET

SystemTimeOfDayInformation

0x020 GET

SystemPathInformation

System path is available via structure KUSER_SHARED_DATA.

SystemProcessInformation

SystemCallCountInformation

SystemDeviceInformation

0x018 GET SystemConfigurationInformation

SystemProcessorPerformanceInformation

SystemFlagsInformation

0x004 GET SET

SystemCallTimeInformation

NOT_IMPLEMENTED

SystemModuleInformation

SystemLocksInformation

0x028+ GET

SystemStackTraceInformation

0x05C GET

SystemPagedPoolInformation

0x01C GET checked build only

SystemNonPagedPoolInformation

0x01C GET checked build only

SystemHandleInformation

SystemObjectInformation

SystemPageFileInformation

SystemVdmInstemulInformation

0x088 GET

SystemVdmBopInformation

INVALID_INFO_CLASS

SystemFileCacheInformation

0x00C, 0x024 GET SET

SystemPoolTagInformation

0x020+ GET

SystemInterruptInformation

0x018 GET

SystemDpcBehaviorInformation

0x014 GET SET

SystemFullMemoryInformation

0x014 GET checked build only

SystemLoadGdiDriverInformation

0x018 SET

SystemUnloadGdiDriverInformation

0x004 SET

SystemTimeAdjustmentInformation

SystemSummaryMemoryInformation

0x014 GET checked build only

SystemNextEventIdInformation

???? (C0000005) GET checked build only

SystemEventIdsInformation

0xB66 GET checked build only

SystemCrashDumpInformation

0x004 GET

SystemExceptionInformation

0x010 GET

SystemCrashDumpStateInformation

0x004 GET

SystemKernelDebuggerInformation

0x002 GET

SystemContextSwitchInformation

0x030 GET

SystemRegistryQuotaInformation

SystemExtendServiceTableInformation

SystemPrioritySeperation

0x004 SET

SystemPlugPlayBusInformation

NOT_IMPLEMENTED, GET

SystemDockInformation

NOT_IMPLEMENTED, GET

SystemPowerInformation

INVALID_INFO_CLASS

SystemProcessorSpeedInformation

INVALID_INFO_CLASS

SystemCurrentTimeZoneInformation

0x0AC GET

SystemLookasideInformation

0x000 GET

Documented by

See also