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WHvMapGpaRange

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Syntax

// Guest physical or virtual address
typedef UINT64 WHV_GUEST_PHYSICAL_ADDRESS;
typedef UINT64 WHV_GUEST_VIRTUAL_ADDRESS;


// Flags used by WHvMapGpaRange
typedef enum WHV_MAP_GPA_RANGE_FLAGS
{
    WHvMapGpaRangeFlagNone              = 0x00000000,
    WHvMapGpaRangeFlagRead              = 0x00000001,
    WHvMapGpaRangeFlagWrite             = 0x00000002,
    WHvMapGpaRangeFlagExecute           = 0x00000004,
    WHvMapGpaRangeFlagTrackDirtyPages   = 0x00000008,
} WHV_MAP_GPA_RANGE_FLAGS;

DEFINE_ENUM_FLAG_OPERATORS(WHV_MAP_GPA_RANGE_FLAGS);

HRESULT
WINAPI
WHvMapGpaRange(
    _In_ WHV_PARTITION_HANDLE Partition,
    _In_ VOID* SourceAddress,
    _In_ WHV_GUEST_PHYSICAL_ADDRESS GuestAddress,
    _In_ UINT64 SizeInBytes,
    _In_ WHV_MAP_GPA_RANGE_FLAGS Flags
    );

Parameters

Partition

Handle to the partition object

SourceAddress

Specifies the page-aligned address of the memory region in the caller’s process that is the source of the mapping

GuestAddress

Specifies the destination address in the VM’s physical address space

SizeInBytes

Specifies the number of bytes that are to be mapped

Flags

Specifies the access flags for the mapping

Remarks

Creating a mapping for a range in the GPA space of a partition sets a region in the caller’s process as the backing memory for that range. The operation replaces any previous mappings for the specified GPA pages.