What's New in Hyper-V WMI Provider

Windows Server 2008 R2 introduced the following changes to the Hyper-V WMI provider:

• New Hyper-V Classes
• New Hyper-V Methods
• New Hyper-V Properties
• Modifications to an Existing Hyper-V Method
• Modifications to Existing Hyper-V Properties

New Hyper-V Classes

• Msvm_SystemExportSettingData
• Msvm_VirtualSystemExportSettingData
• Msvm_VirtualSystemImportSettingData

New Hyper-V Methods

• Msvm_Keyboard class—TypeScancodes method added
• Msvm_VirtualSystemManagementService class
  • ApplyVirtualSystemSnapshotEx method
  • CheckSystemCompatibilityInfo method
  • ExportVirtualSystemEx method
  • GetSystemCompatibilityInfo method
  • GetVirtualSystemImportSettingData method
  • ImportVirtualSystemEx method

New Hyper-V Properties

In addition to the properties added with the new Hyper-V classes listed above, the following properties were added:

• Msvm_DynamicForwardingEntry class—VlanId property

• Msvm_KvpExchangeComponentSettingData class—HostOnlyItems property

• Msvm_ProcessorSettingData class—LimitProcessorFeatures property

• Msvm_ResourceAllocationSettingData class—VirtualSystemIdentifiers property

• Msvm_SummaryInformation class:

  • OperationalStatus property
  • StatusDescriptions property

• Msvm_SwitchPort class:

  • AllowMacSpoofing property
  • ChimneyOffloadLimit property
  • ChimneyOffloadUsage property
  • ChimneyOffloadWeight property
  • VMQOffloadLimit property
  • VMQOffloadUsage property
  • VMQOffloadWeight property

• Msvm_VirtualSwitch class:

  • MaxChimneyOffloads property
  • MaxVMQOffloads property

• Msvm_VirtualSystemGlobalSettingData class is now derived from the CIM_VirtualSystemSettingData class instead of the CIM_SettingData class. This adds these properties inherited from the CIM_VirtualSystemSettingData class:

  • AutoActivate property
  • CreationTime property
  • OtherVirtualSystemType property
  • SettingType property
  • SystemName property
  • VirtualSystemType property

  In addition, the AllowFullSCSICommandSet and Version properties were added.

• Msvm_VirtualSystemManagementServiceSettingData class—NumaSpanningEnabled property

Modifications to an Existing Hyper-V Method

• Msvm_ProcessorPool class—CalculatePossibleReserve method now computes reserve.

Modifications to Existing Hyper-V Properties

• Msvm_ComputerSystem class:
  • EnabledState property—supported values changed.
  • HealthState property—supported values changed.
  • OperationalStatus property—supported values changed for OperationalStatus[0] and OperationalStatus[1] was added.
  • RequestedState property—supported values changed.
• Msvm_KvpExchangeDataItem class—new value for Source property