// d3dkmddi.h

typedef struct _DXGK_NOTIFYALLOCFLAGS {
  union {
    struct {
      UINT Eviction : 1;
      UINT IoMmuUnmap : 1;
      UINT Reserved : 30;
    };
    UINT Value;
  };
} DXGK_NOTIFYALLOCFLAGS;
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Windows Driver Kit DDI reference (ns-d3dkmddi-dxgk_notifyallocflags)

Description

The DXGK_NOTIFYALLOCFLAGS structure specifies flags related to allocation notifications for paging operations.

Members

`Eviction`

The allocation is about to be evicted.

`IoMmuUnmap`

The allocation is about to be unmapped from the IOMMU.

`Reserved`

Reserved for future use; set to zero.

`Value`

Union member that allows access to all flags in the structure.

Remarks

The Eviction and IoMmuUnmap flags can't be set together.

A kernel-mode driver (KMD) Dxgkrnl uses these flags to notify the kernel-mode driver (KMD) that specific actions before an allocation is either evicted or unmapped from the IOMMU.

For more information, see Allocation Notification.

DXGK_NOTIFYALLOCFLAGS - NtDoc