// d3dkmddi.h

typedef struct _DXGK_PHYSICALADAPTERFLAGS {
  union {
    struct {
      UINT IoMmuSupported : 1;
      UINT GpuMmuSupported : 1;
      UINT MovePagingSupported : 1;
      UINT VPRPagingContextRequired : 1;
      UINT AllowHardwareProtectedNoVpr : 1;
      UINT VirtualCopyEngineSupported : 1;
      UINT GpuVaIommuRequired : 1;
      UINT GpuVaIommuGlobalRequired : 1;
      UINT GpuVaIommuCacheCoherent : 1;
#if ...
      UINT Reserved : 23;
#elif
      UINT Reserved : 26;
#elif
      UINT Reserved : 27;
#elif
      UINT Reserved : 28;
#else
      UINT Reserved : 30;
#endif
    };
    UINT Value;
  };
} DXGK_PHYSICALADAPTERFLAGS;
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Windows Driver Kit DDI reference (ns-d3dkmddi-_dxgk_physicaladapterflags)

_DXGK_PHYSICALADAPTERFLAGS structure

Description

DXGK_PHYSICALADAPTERFLAGS defines a set of flags to indicate the type of memory management model supported by a device.

Members

`IoMmuSupported`

Indicates that the CPU and GPU share a common address space and common page tables.

`GpuMmuSupported`

Indicates that the video memory manager manages the GPU memory management unit and underlying page tables to expose services to the user mode driver.

`MovePagingSupported`

Indicates that the device driver is capable of moving content to a new destination on the same memory segment.

`VPRPagingContextRequired`

Indicates that the device driver requires that move paging operations done within a Video Protected Region (VPR) occur on a different paging context than standard paging operations.

`AllowHardwareProtectedNoVpr`

Indicates that the hardware does not use a range-based VPR for hardware-protected surfaces, and instead uses allocation based hardware protection.

`VirtualCopyEngineSupported`

Indicates that the driver implements an emulated aperture segment and uses a virtualized hardware node to map and unmap the page tables for the aperture. Supported starting with Windows 10 version 2004.

`Reserved`

This member is reserved and should be set to zero.

`Value`

The consolidated value of the bitfield members in this structure.

View the official Windows Driver Kit DDI reference

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