// d3dkmthk.h

typedef struct _DXGK_ESCAPE_GPUMMUCAPS {
  BOOLEAN                      ReadOnlyMemorySupported;
  BOOLEAN                      NoExecuteMemorySupported;
  BOOLEAN                      ZeroInPteSupported;
  BOOLEAN                      CacheCoherentMemorySupported;
  BOOLEAN                      LargePageSupported;
  BOOLEAN                      DualPteSupported;
  BOOLEAN                      AllowNonAlignedLargePageAddress;
  BOOLEAN                      PageTable64KSupported : 1;
  BOOLEAN                      Reserved : 7;
  UINT                         VirtualAddressBitCount;
  UINT                         PageTableLevelCount;
  D3DKMT_PAGE_TABLE_LEVEL_DESC PageTableLevelDesk[DXGK_MAX_PAGE_TABLE_LEVEL_COUNT];
} DXGK_ESCAPE_GPUMMUCAPS;
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Windows Driver Kit DDI reference (ns-d3dkmthk-_dxgk_escape_gpummucaps)

_DXGK_ESCAPE_GPUMMUCAPS structure

Description

The GPU memory management capabilities.

Members

`ReadOnlyMemorySupported`

Read-only memory is supported.

`NoExecuteMemorySupported`

No execute memory is supported.

`ZeroInPteSupported`

`CacheCoherentMemorySupported`

Cache coherent memory is supported.

`LargePageSupported`

When set to 1, all levels of page tables, except the leaf one, support large pages (LargePage bit in DXGK_PTE).

`DualPteSupported`

When set to 1, the GPU supports two pointers to page tables in the level one page table (4 KB page table and 64 KB page table).

`AllowNonAlignedLargePageAddress`

When set to 1, the Operating System is able to set the LargePage flag when the physical address of the large page entry is not aligned to the leaf page table coverage.

`VirtualAddressBitCount`

The virtual address bit count.

`PageTableLevelCount`

The number of page table levels supported.

`PageTableLevelDesk`

The page table level descriptions.

DXGK_ESCAPE_GPUMMUCAPS - NtDoc