Here is a list of all documented struct and union fields with links to the struct/union documentation for each field:

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A2HData : EFI_DNS4_COMPLETION_TOKEN, EFI_DNS6_COMPLETION_TOKEN
AbortOnClose : EFI_TCP6_CLOSE_TOKEN
AbsoluteMaxX : EFI_ABSOLUTE_POINTER_MODE
AbsoluteMaxY : EFI_ABSOLUTE_POINTER_MODE
AbsoluteMaxZ : EFI_ABSOLUTE_POINTER_MODE
AbsoluteMinX : EFI_ABSOLUTE_POINTER_MODE
AbsoluteMinY : EFI_ABSOLUTE_POINTER_MODE
AbsoluteMinZ : EFI_ABSOLUTE_POINTER_MODE
Acb : EFI_ATA_PASS_THRU_COMMAND_PACKET
AcceptAnyPort : EFI_UDP6_CONFIG_DATA
AcceptAnyProtocol : EFI_IP4_CONFIG_DATA, EFI_IP6_CONFIG_DATA
AcceptBroadcast : EFI_IP4_CONFIG_DATA
AcceptIcmpErrors : EFI_IP4_CONFIG_DATA, EFI_IP6_CONFIG_DATA
AcceptPromiscuous : EFI_IP4_CONFIG_DATA, EFI_IP6_CONFIG_DATA, EFI_UDP6_CONFIG_DATA
Access : PTP_FIFO_REGISTERS, TIS_PC_REGISTERS
AccessNetworkType : EFI_80211_SCAN_DATA
AccessPoint : EFI_TCP6_CONFIG_DATA
AccessSize : EArchCommonSerialPortInfo
Accuracy : EFI_TIME_CAPABILITIES
Ack : _TCP_SEG, EFI_MTFTP4_PACKET, EFI_MTFTP6_PACKET
Ack8 : EFI_MTFTP4_PACKET, EFI_MTFTP6_PACKET
ACPI : CPUID_VERSION_INFO_EDX
ACPIBAR_BASE_ADDRESS : MSR_SKYLAKE_TRACE_HUB_STH_ACPIBAR_BASE_REGISTER
AcpiDeviceNumber : EFI_ACPI_DMAR_ANDD_HEADER
AcpiIdObjectToken : CmArchCommonProcHierarchyInfo
AcpiParameterBuffer : PRM_HANDLER_INFORMATION_STRUCT
AcpiParameterBufferDescriptorCount : PRM_MODULE_CONTEXT_BUFFERS
AcpiParameterBufferDescriptors : PRM_MODULE_CONTEXT_BUFFERS
AcpiProcessorId : EFI_ACPI_AEST_PROCESSOR_STRUCT
AcpiProcessorUid : CmArmGicCInfo
AcpiS3Enable : MM_ACPI_S3_ENABLE
AcpiTableData : CmAStdObjAcpiTableInfo
AcpiTableName : ACPI_TABLE_PRESENCE_INFO
AcpiTableRevision : AcpiTableGenerator, CmAStdObjAcpiTableInfo
AcpiTableSignature : ACPI_TABLE_PRESENCE_INFO, AcpiTableGenerator, CmAStdObjAcpiTableInfo
AcpiVersion : _EFI_ACPI_SDT_PROTOCOL
Action : _EFI_IPSEC_SPD_DATA, EFI_IMAGE_EXECUTION_INFO
Active : EFI_FTP4_CONFIG_DATA
ActiveButtons : EFI_ABSOLUTE_POINTER_STATE
ActiveFlag : EFI_TCP6_ACCESS_POINT
Activity_Window : MSR_IA32_HWP_REQUEST_PKG_REGISTER, MSR_IA32_HWP_REQUEST_REGISTER
AdapterId : EFI_EXT_SCSI_PASS_THRU_MODE, EFI_SCSI_PASS_THRU_MODE
additional_supported : ATA_IDENTIFY_DATA
AdditiveDelayForCsCa : SPD3_MODULE_LOADREDUCED
AdditiveDelayForOdtCke : SPD3_MODULE_LOADREDUCED
AddKey : _EFI_KMS_PROTOCOL
AddKeyAttributes : _EFI_KMS_PROTOCOL
AddLen : USB_BOOT_INQUIRY_DATA, USB_BOOT_REQUEST_SENSE_DATA
addnl_length : ATAPI_INQUIRY_DATA
addnl_sense_code : ATAPI_REQUEST_SENSE_DATA
Addnl_Sense_Code : EFI_SCSI_SENSE_DATA
addnl_sense_code_qualifier : ATAPI_REQUEST_SENSE_DATA
Addnl_Sense_Code_Qualifier : EFI_SCSI_SENSE_DATA
addnl_sense_length : ATAPI_REQUEST_SENSE_DATA
Addnl_Sense_Length : EFI_SCSI_SENSE_DATA
Addr : s_pxe_cpb_nvdata_sparse
ADDR0_CFG : MSR_GOLDMONT_IA32_RTIT_CTL_REGISTER, MSR_IA32_RTIT_CTL_REGISTER
ADDR1_CFG : MSR_GOLDMONT_IA32_RTIT_CTL_REGISTER, MSR_IA32_RTIT_CTL_REGISTER
ADDR2_CFG : MSR_IA32_RTIT_CTL_REGISTER
ADDR3_CFG : MSR_IA32_RTIT_CTL_REGISTER
Address : _EFI_IP_ADDRESS_INFO, _EFI_ISA_HC_PPI, BLUETOOTH_ADDRESS, BLUETOOTH_LE_ADDRESS, EFI_IP4_CONFIG2_MANUAL_ADDRESS, EFI_IP6_ADDRESS_INFO, EFI_IP6_CONFIG_MANUAL_ADDRESS, EFI_MEMORY_EXTENDED_ERROR_DATA, MSR_P6_BBL_CR_ADDR_REGISTER
AddressAbstractionGuid : EFI_NVDIMM_LABEL
AddressCommandOutputs : SPD3_LRDIMM_TIMING_CONTROL_DRIVE_STRENGTH
AddressCommandPrelaunch : SPD3_LRDIMM_TIMING_CONTROL_DRIVE_STRENGTH
AddressCount : EFI_IP6_MODE_DATA, EFI_IP6_VARIABLE_DATA
AddressInfo : EFI_IP6_CONFIG_INTERFACE_INFO
AddressInfoCount : EFI_IP6_CONFIG_INTERFACE_INFO
AddressingMode : EFI_ACPI_AEST_INTERFACE_STRUCT
AddressLength : PccSubspaceGenericInfo
AddressList : EFI_IP6_MODE_DATA
AddressMappingEdgeConn : SPD3_MODULE_UNBUFFERED, SPD4_MODULE_UNBUFFERED
AddressMappingFromRegisterToDram : SPD4_MODULE_LOADREDUCED
AddressMappingFromRegisterToDRAM : SPD4_MODULE_REGISTERED
AddressMapToken : CmArchCommonPciConfigSpaceInfo
AddressMode : MSR_IVY_BRIDGE_IA32_MC6_MISC_REGISTER
AddressOfControlArea : CmArchCommonTpm2InterfaceInfo
AddressOfEntryPoint : EFI_TE_IMAGE_HEADER
AddressPairs : EFI_IP6_VARIABLE_DATA
AddressParityCheckEnable : MSR_P6_BBL_CR_CTL3_REGISTER
AddressParityEnable : MSR_CORE2_EBL_CR_POWERON_REGISTER, MSR_CORE_EBL_CR_POWERON_REGISTER, MSR_PENTIUM_M_EBL_CR_POWERON_REGISTER
AddressRequestErrorCheckingDisable : MSR_PENTIUM_4_EBC_SOFT_POWERON_REGISTER
AddressSignal : EFI_GENERIC_ERROR_STATUS
AddressSize : CmArchCommonPciAddressMapInfo, DBG2_DEBUG_DEVICE_INFORMATION
AddressSizeLimit : CmArmNamedComponentNode
AddressType : SMBIOS_TABLE_TYPE34
AddrIsOk : HTTP_BOOT_URI_CONTENT
AdjacentCacheLinePrefetchDisable : MSR_CORE2_IA32_MISC_ENABLE_REGISTER, MSR_PENTIUM_4_IA32_MISC_ENABLE_REGISTER
ADR : ACPI_ADR_DEVICE_PATH
advanced_pio_modes : ATAPI_IDENTIFY_DATA
AdvertisementFlagFilter : EFI_BLUETOOTH_LE_CONFIG_SCAN_PARAMETER
ADX : CPUID_STRUCTURED_EXTENDED_FEATURE_FLAGS_EBX
AeadAesGcmEncrypt : _EDKII_CRYPTO_PROTOCOL
AERR_DriveEnable : MSR_ATOM_EBL_CR_POWERON_REGISTER, MSR_P6_EBL_CR_POWERON_REGISTER
AERR_ObservationEnabled : MSR_ATOM_EBL_CR_POWERON_REGISTER, MSR_P6_EBL_CR_POWERON_REGISTER
AESConfiguration : MSR_SANDY_BRIDGE_FEATURE_CONFIG_REGISTER, MSR_SILVERMONT_FEATURE_CONFIG_REGISTER, MSR_XEON_5600_FEATURE_CONFIG_REGISTER, MSR_XEON_E7_FEATURE_CONFIG_REGISTER, MSR_XEON_PHI_FEATURE_CONFIG_REGISTER
AesGetContextSize : _EDKII_CRYPTO_PROTOCOL
AESNI : CPUID_VERSION_INFO_ECX
AffinityFlags : CmArmGicCInfo
AgentID : MSR_PENTIUM_4_EBC_HARD_POWERON_REGISTER
AggressiveDeviceSleepEnable : EDKII_ATA_ATAPI_POLICY_PROTOCOL
AlgoInfo : _EFI_IPSEC_SA_DATA2, _EFI_IPSEC_SA_DATA
AlgorithmID : EFI_BIS_SIGNATURE_INFO
Alignment : _EFI_IFR_GUID_BANNER, EFI_NVDIMM_LABEL
alignment_logic_in_phy_blocks : ATA_IDENTIFY_DATA
AllBranchMispredictRetired : CPUID_ARCHITECTURAL_PERFORMANCE_MONITORING_EBX
AllEntries : PROTOCOL_ENTRY
AllHandles : IHANDLE
AllocationAttributes : PCI_ROOT_BRIDGE, UNIVERSAL_PAYLOAD_PCI_ROOT_BRIDGE
AllocationHints : CmArmNamedComponentNode, CmArmRootComplexNode
AllocDescriptor : EFI_HOB_MEMORY_ALLOCATION, EFI_HOB_MEMORY_ALLOCATION_BSP_STORE, EFI_HOB_MEMORY_ALLOCATION_STACK
AllocLen : USB_BOOT_REQUEST_SENSE_CMD
AllocResSize : EFI_RESOURCE_ALLOC_FAILURE_ERROR_DATA
AllowDuplicatePort : EFI_UDP6_CONFIG_DATA
AltDataPort : EFI_FTP4_CONFIG_DATA
AlternateInjection : MSR_SEV_STATUS_REGISTER
AlternateLBA : EFI_PARTITION_TABLE_HEADER
AltGrUnicode : EFI_KEY_DESCRIPTOR
AltMovCr8 : CPUID_AMD_EXTENDED_CPU_SIG_ECX
AltPressed : EFI_BOOT_KEY_DATA
AmlByteEncoding : AmlObjectNode
AndMask : EFI_SIO_REGISTER_MODIFY
AnimationCell : _EFI_HII_AIBT_CLEAR_IMAGES_BLOCK, _EFI_HII_AIBT_OVERLAY_IMAGES_BLOCK, _EFI_HII_AIBT_RESTORE_SCRN_BLOCK
AnimationId : _EFI_HII_AIBT_DUPLICATE_BLOCK
AnimationInfoOffset : _EFI_HII_ANIMATION_PACKAGE_HDR
AntiReplayWindows : _EFI_IPSEC_SA_DATA2, _EFI_IPSEC_SA_DATA
ANY : MSR_HASWELL_IA32_PERFEVTSEL2_REGISTER, MSR_HASWELL_IA32_PERFEVTSEL_REGISTER, MSR_IA32_PERFEVTSEL_REGISTER
AnyThread0 : MSR_IA32_FIXED_CTR_CTRL_REGISTER
AnyThread1 : MSR_IA32_FIXED_CTR_CTRL_REGISTER
AnyThread2 : MSR_IA32_FIXED_CTR_CTRL_REGISTER
AnyThreadDeprecation : CPUID_ARCHITECTURAL_PERFORMANCE_MONITORING_EDX
APIC : CPUID_AMD_EXTENDED_CPU_SIG_EDX, CPUID_VERSION_INFO_EDX
ApicBase : MSR_IA32_APIC_BASE_REGISTER, MSR_P6_APIC_BASE_REGISTER
ApicBaseHi : MSR_IA32_APIC_BASE_REGISTER
APICClusterID : MSR_ATOM_EBL_CR_POWERON_REGISTER, MSR_CORE2_EBL_CR_POWERON_REGISTER, MSR_CORE_EBL_CR_POWERON_REGISTER, MSR_P6_EBL_CR_POWERON_REGISTER, MSR_PENTIUM_4_EBC_HARD_POWERON_REGISTER, MSR_PENTIUM_M_EBL_CR_POWERON_REGISTER
ApicID : DEBUG_CPU_DATA, FPDT_DUAL_GUID_STRING_EVENT_RECORD, FPDT_DYNAMIC_STRING_EVENT_RECORD, FPDT_GUID_EVENT_RECORD, FPDT_GUID_QWORD_EVENT_RECORD, FPDT_GUID_QWORD_STRING_EVENT_RECORD
ApicIdCoreIdSize : CPUID_AMD_VIR_PHY_ADDRESS_SIZE_ECX
ApicIdShift : CPUID_EXTENDED_TOPOLOGY_EAX
ARAT : CPUID_THERMAL_POWER_MANAGEMENT_EAX
ARB : MSR_HASWELL_UNC_PERF_GLOBAL_STATUS_REGISTER, MSR_SANDY_BRIDGE_UNC_PERF_GLOBAL_STATUS_REGISTER, MSR_SKYLAKE_UNC_PERF_GLOBAL_STATUS_REGISTER
ArchCommonCmObjArray : DynamicPlatformRepositoryInfo
ArchCommonCmObjList : DynamicPlatformRepositoryInfo
ArchFlags : CmArchCommonLpiInfo
ArchPerfMonVerID : CPUID_ARCHITECTURAL_PERFORMANCE_MONITORING_EAX
Argc : _EFI_SHELL_PARAMETERS_PROTOCOL, SCRIPT_FILE
ArgInfo : EFI_SHELL_INTERFACE
Argv : _EFI_SHELL_PARAMETERS_PROTOCOL, EFI_SHELL_INTERFACE, SCRIPT_FILE
ArmCmObjArray : DynamicPlatformRepositoryInfo
ArmCmObjList : DynamicPlatformRepositoryInfo
Array : EFI_STATUS_CODE_DIMM_NUMBER
ArrayElementLength : EFI_ACPI_ASF_ALRT, EFI_ACPI_ASF_RCTL
ArrivedCpuCountUponLock : SMM_CPU_SYNC_CONTEXT
Asb : EFI_ATA_PASS_THRU_COMMAND_PACKET
Asc : USB_BOOT_REQUEST_SENSE_DATA
ASCI : MSR_GOLDMONT_IA32_PERF_GLOBAL_STATUS_RESET_REGISTER, MSR_GOLDMONT_IA32_PERF_GLOBAL_STATUS_SET_REGISTER, MSR_IA32_PERF_GLOBAL_STATUS_REGISTER, MSR_IA32_PERF_GLOBAL_STATUS_RESET_REGISTER, MSR_IA32_PERF_GLOBAL_STATUS_SET_REGISTER, MSR_SKYLAKE_IA32_PERF_GLOBAL_STATUS_REGISTER, MSR_SKYLAKE_IA32_PERF_GLOBAL_STATUS_RESET_REGISTER, MSR_SKYLAKE_IA32_PERF_GLOBAL_STATUS_SET_REGISTER
Ascii : EFI_STATUS_CODE_STRING
Ascq : USB_BOOT_REQUEST_SENSE_DATA
AssociationID : EFI_80211_ASSOCIATE_RESULT
Associativity : CCSIDR_DATA, CmArchCommonCacheInfo, SMBIOS_TABLE_TYPE7
AtaData : EFI_IDENTIFY_DATA
atapi_byte_count_0_behavior : ATAPI_IDENTIFY_DATA
AtapiData : EFI_IDENTIFY_DATA
AtRuntime : _EFI_RUNTIME_ARCH_PROTOCOL
AtsAttribute : CmArmRootComplexNode
AttribSize : _CONSOLE_LOGGER_PRIVATE_DATA
Attribute : _AML_BYTE_ENCODING, EFI_FILE_INFO, EFI_LEGACY_REGION_DESCRIPTOR, EFI_MEMORY_DESCRIPTOR, EFI_SIMPLE_TEXT_OUTPUT_MODE, MM_CPU_MEMORY_REGION
Attributes : _CONSOLE_LOGGER_PRIVATE_DATA, _EFI_LOAD_OPTION, _EFI_SPI_HC_PROTOCOL, _EFI_SPI_IO_PROTOCOL, _EFI_SPI_PERIPHERAL, _VARIABLE_INFO_ENTRY, AUTHENTICATED_VARIABLE_HEADER, CmArchCommonCacheInfo, EFI_ABSOLUTE_POINTER_MODE, EFI_EXT_SCSI_PASS_THRU_MODE, EFI_FFS_FILE_HEADER2, EFI_FFS_FILE_HEADER, EFI_FIRMWARE_VOLUME_HEADER, EFI_GCD_MEMORY_SPACE_DESCRIPTOR, EFI_GUID_DEFINED_SECTION2, EFI_GUID_DEFINED_SECTION, EFI_HOST_PROCESSOR_MISMATCH_ERROR_DATA, EFI_NARROW_GLYPH, EFI_PARTITION_ENTRY, EFI_SCSI_PASS_THRU_MODE, EFI_WIDE_GLYPH, HII_FORMSET_STORAGE, PCI_ROOT_BRIDGE, SCMI_PERFORMANCE_FASTCHANNEL, UNIVERSAL_PAYLOAD_PCI_ROOT_BRIDGE, VARIABLE_HEADER
AttributesSetting : EFI_FIRMWARE_IMAGE_DESCRIPTOR, EFI_FIRMWARE_IMAGE_DESCRIPTOR_V1, EFI_FIRMWARE_IMAGE_DESCRIPTOR_V2
AttributesSupported : EFI_FIRMWARE_IMAGE_DESCRIPTOR, EFI_FIRMWARE_IMAGE_DESCRIPTOR_V1, EFI_FIRMWARE_IMAGE_DESCRIPTOR_V2
AuthAlgoId : _EFI_IPSEC_PROCESS_POLICY
AuthData : _EFI_IPSEC_PAD_DATA
AuthDataSize : _EFI_IPSEC_PAD_DATA
AuthenticationStatus : _EFI_PEI_FIRMWARE_VOLUME_INFO2_PPI, EFI_FV_FILE_INFO2, EFI_HOB_FIRMWARE_VOLUME3
AuthInfo : EFI_FIRMWARE_IMAGE_AUTHENTICATION, EFI_VARIABLE_AUTHENTICATION, EFI_VARIABLE_AUTHENTICATION_2
AuthMethod : _EFI_IPSEC_PAD_DATA
AuthPeriod : _EFI_EAPOL_SUPPLICANT_PAE_CONFIGURATION
AuthProtocol : _EFI_IPSEC_PAD_DATA
AuthType : EFI_80211_AUTHENTICATE_DATA
AutomaticC_StateConversionEnable : MSR_SKYLAKE_PKG_CST_CONFIG_CONTROL_REGISTER
AutomaticThermalControlCircuit : MSR_ATOM_IA32_MISC_ENABLE_REGISTER, MSR_CORE2_IA32_MISC_ENABLE_REGISTER, MSR_CORE_IA32_MISC_ENABLE_REGISTER, MSR_GOLDMONT_IA32_MISC_ENABLE_REGISTER, MSR_IA32_MISC_ENABLE_REGISTER, MSR_NEHALEM_IA32_MISC_ENABLE_REGISTER, MSR_PENTIUM_M_IA32_MISC_ENABLE_REGISTER, MSR_SILVERMONT_IA32_MISC_ENABLE_REGISTER, MSR_XEON_PHI_IA32_MISC_ENABLE_REGISTER
AutonomousActivityWindowRegister : AmlCpcInfo
AutonomousSelectionEnableBuffer : AmlCpcInfo
AutonomousUtilizationBasedFrequencyControlLog : MSR_HASWELL_CORE_PERF_LIMIT_REASONS_REGISTER, MSR_HASWELL_E_CORE_PERF_LIMIT_REASONS_REGISTER, MSR_HASWELL_GRAPHICS_PERF_LIMIT_REASONS_REGISTER, MSR_HASWELL_RING_PERF_LIMIT_REASONS_REGISTER, MSR_XEON_D_CORE_PERF_LIMIT_REASONS_REGISTER
AutonomousUtilizationBasedFrequencyControlStatus : MSR_HASWELL_CORE_PERF_LIMIT_REASONS_REGISTER, MSR_HASWELL_E_CORE_PERF_LIMIT_REASONS_REGISTER, MSR_HASWELL_GRAPHICS_PERF_LIMIT_REASONS_REGISTER, MSR_XEON_D_CORE_PERF_LIMIT_REASONS_REGISTER
AutoSelfRefresh : SPD3_SDRAM_THERMAL_REFRESH_STRUCT
AUX : MSR_IA32_TSC_AUX_REGISTER
Available : SECURE_RNG_ALGO_ARRAY
AverageResume : EFI_ACPI_5_0_FPDT_S3_RESUME_RECORD, EFI_ACPI_5_1_FPDT_S3_RESUME_RECORD, EFI_ACPI_6_0_FPDT_S3_RESUME_RECORD, EFI_ACPI_6_1_FPDT_S3_RESUME_RECORD, EFI_ACPI_6_2_FPDT_S3_RESUME_RECORD, EFI_ACPI_6_3_FPDT_S3_RESUME_RECORD, EFI_ACPI_6_4_FPDT_S3_RESUME_RECORD, EFI_ACPI_6_5_FPDT_S3_RESUME_RECORD
AVX : CPUID_EXTENDED_STATE_MAIN_LEAF_EAX, CPUID_VERSION_INFO_ECX
AVX2 : CPUID_STRUCTURED_EXTENDED_FEATURE_FLAGS_EBX
AVX512_4FMAPS : CPUID_STRUCTURED_EXTENDED_FEATURE_FLAGS_EDX
AVX512_4VNNIW : CPUID_STRUCTURED_EXTENDED_FEATURE_FLAGS_EDX
AVX512_IFMA : CPUID_STRUCTURED_EXTENDED_FEATURE_FLAGS_EBX
AVX512_VBMI : CPUID_STRUCTURED_EXTENDED_FEATURE_FLAGS_ECX
AVX512_VPOPCNTDQ : CPUID_STRUCTURED_EXTENDED_FEATURE_FLAGS_ECX
AVX512BW : CPUID_STRUCTURED_EXTENDED_FEATURE_FLAGS_EBX
AVX512CD : CPUID_STRUCTURED_EXTENDED_FEATURE_FLAGS_EBX
AVX512DQ : CPUID_STRUCTURED_EXTENDED_FEATURE_FLAGS_EBX
AVX512ER : CPUID_STRUCTURED_EXTENDED_FEATURE_FLAGS_EBX
AVX512F : CPUID_STRUCTURED_EXTENDED_FEATURE_FLAGS_EBX
AVX512PF : CPUID_STRUCTURED_EXTENDED_FEATURE_FLAGS_EBX
AVX512VL : CPUID_STRUCTURED_EXTENDED_FEATURE_FLAGS_EBX
AVX_512 : CPUID_EXTENDED_STATE_MAIN_LEAF_EAX