IOMMU_INTERFACE_STATE_CHANGE_FIELDS union (wdm.h)

IOMMU_INTERFACE_STATE_CHANGE_FIELDS represents the fields of an IOMMU_INTERFACE_STATE_CHANGE, indicating the caller's wish to be notified of a change of a specific state field(s) or indicating to callback owners which states have changed.

When a caller attempts to register an IOMMU_INTERFACE_STATE_CHANGE_CALLBACK through IOMMU_REGISTER_INTERFACE_STATE_CHANGE_CALLBACK, these fields indicate the state(s) that the caller wants to be notified about.

When a registered IOMMU_INTERFACE_STATE_CHANGE_CALLBACK is invoked, the callback owner receives an IOMMU_INTERFACE_STATE_CHANGE; these fields indicate which states have changed.

Syntax

typedef union _IOMMU_INTERFACE_STATE_CHANGE_FIELDS {
  struct {
    ULONG AvailableDomainTypes : 1;
    ULONG Reserved : 31;
  } DUMMYSTRUCTNAME;
  ULONG  AsULONG;
} IOMMU_INTERFACE_STATE_CHANGE_FIELDS, *PIOMMU_INTERFACE_STATE_CHANGE_FIELDS;

Members

DUMMYSTRUCTNAME

A structure containing various states of an IOMMU interface.

DUMMYSTRUCTNAME.AvailableDomainTypes

When set to 1, this indicates that the caller wants to be notified (via the provided callback) when the available ___domain types change or this indicates to callback owners that the available ___domain types have changed.

DUMMYSTRUCTNAME.Reserved

Reserved for future fields. Currently unused.

AsULONG

The consolidated values of the fields in DUMMYSTRUCTNAME.

Requirements

See also

IOMMU_INTERFACE_STATE_CHANGE

IOMMU_INTERFACE_STATE_CHANGE_CALLBACK

IOMMU_REGISTER_INTERFACE_STATE_CHANGE_CALLBACK