DXGK_ALLOCATIONINFOFLAGS2 structure (d3dkmddi.h)

The DXGK_ALLOCATIONINFOFLAGS2 structure contains additional properties for an allocation.

Syntax

typedef struct _DXGK_ALLOCATIONINFOFLAGS2 {
  union {
    struct {
      UINT ShareBackingStoreWithKmd : 1;
      UINT NoImplicitSynchronization : 1;
      UINT DisablePartialResidency : 1;
      UINT RestrictedToSingleSegment : 1;
      UINT NotifyEviction : 1;
      UINT NotifyIoMmuUnmap : 1;
#if ...
      UINT Reserved : 26;
#else
      UINT Reserved : 31;
#endif
    };
    UINT Value;
  };
} DXGK_ALLOCATIONINFOFLAGS2;

Members

ShareBackingStoreWithKmd

When set, the kernel-mode driver (KMD) is notifying Dxgkrnl that it needs to know the address of the allocation backing store. The allocation must be created shared and must reside only in the aperture memory segment.

NoImplicitSynchronization

When set, KMD is opting out of implicit primary synchronization. This flag was introduced in Windows 11, version 24H2 (WDDM 3.2).

DisablePartialResidency

When set, indicates that the allocation doesn't support partial residency. The allocation must either be entirely evicted or entirely resident. This flag was introduced in Windows 11, version 24H2 (WDDM 3.2).

RestrictedToSingleSegment

When set, indicates that the allocation doesn't support cross-segment residency. The allocation must be entirely resident within a single segment. This flag was introduced in Windows 11, version 24H2 (WDDM 3.2).

NotifyEviction

When set, indicates that Dxgkrnl should issue a DXGK_OPERATION_NOTIFY_ALLOC NotifyEviction operation to KMD before evicting an allocation. This flag was introduced in Windows 11, version 24H2 (WDDM 3.2). For more information, see Allocation notification.

NotifyIoMmuUnmap

When set, indicates that Dxgkrnl should issue a DXGK_OPERATION_NOTIFY_ALLOC NotifyIoMmuUnmap operation to KMD before unmapping an allocation from the IOMMU. This flag was introduced in Windows 11, version 24H2 (WDDM 3.2). For more information, see Allocation notification.

Reserved

Reserved; do not use.

Value

An alternative way to access the bits of this structure.

Requirements

Requirement Value
Minimum supported client Windows 11 (WDDM 3.0)
Header d3dkmddi.h

See also

DXGK_ALLOCATIONINFO

DXGKDDI_CREATEALLOCATION