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NdisGetHypervisorInfo function (ndis.h)

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Important  

Starting with Windows 10 Version 1703, NdisGetHypervisorInfo is deprecated and should not be used. Drivers are encouraged to move away from it, as it may not be available in future versions of the operating system.

Drivers should instead follow a hypervisor's instructions to query hypervisor presence and capabilities. For example, Hyper-V's instructions are documented in the Top-Level Functional Specification.

The NdisGetHypervisorInfo function returns information about the hypervisor that is present on the system.

Syntax

NDIS_STATUS NdisGetHypervisorInfo(
  [in, out] PNDIS_HYPERVISOR_INFO HypervisorInfo
);

Parameters

[in, out] HypervisorInfo

A pointer to a caller-allocated NDIS_HYPERVISOR_INFO structure that contains information about the hypervisor that is present on the system.

Return value

NdisGetHypervisorInfo can return one of the following status values:

Return code Description
NDIS_STATUS_SUCCESS
 The operation completed successfully.
NDIS_STATUS_BUFFER_TOO_SHORT
 The size of the input parameter buffer was too small.

Remarks

NDIS miniport drivers call the NdisGetHypervisorInfo function to determine whether a hypervisor is present on the system.

When the NdisGetHypervisorInfo function returns, the HypervisorInfo parameter contains a pointer to an NDIS_HYPERVISOR_INFO structure. This structure contains information about whether a hypervisor is present, along with the partition type from which this function was called. The NDIS_HYPERVISOR_INFO structure provides this information in the following way:

  • If a hypervisor is present, the NDIS_HYPERVISOR_INFO_FLAG_HYPERVISOR_PRESENT flag is set in the Flags member.
  • If the Microsoft hypervisor is present, the PartitionType member is set to one of the following values:
    • If the NdisGetHypervisorInfo function was called from the management operating system that runs in the Hyper-V parent partition, the PartitionType member is set to NdisHypervisorPartitionTypeMsHvParent.
    • If the NdisGetHypervisorInfo function was called from the guest operating system that runs in the Hyper-V child partition, the PartitionType member is set to NdisHypervisorPartitionMsHvChild.
  • If another vendor's hypervisor is present, the PartitionType member is set to NdisHypervisorPartitionTypeUnknown.
Note  A driver must initialize the Header member of the NDIS_HYPERVISOR_INFO structure before it calls the NdisGetHypervisorInfo function.
 

Requirements

Requirement Value
Minimum supported client Supported in NDIS 6.0 and later.
Target Platform Universal
Header ndis.h (include Ndis.h)
Library Ndis.lib
IRQL <= DISPATCH_LEVEL

See also

NDIS_HYPERVISOR_INFO