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WHvQueryGpaRangeDirtyBitmap

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Syntax

HRESULT
WINAPI
WHvQueryGpaRangeDirtyBitmap(
    _In_ WHV_PARTITION_HANDLE Partition,
    _In_ WHV_GUEST_PHYSICAL_ADDRESS GuestAddress,
    _In_ UINT64 RangeSizeInBytes,
    _Out_writes_bytes_opt_(BitmapSizeInBytes) UINT64* Bitmap,
    _In_ UINT32 BitmapSizeInBytes
    );

Parameters

Partition

Specifies the partition to query.

GuestAddress

Specifies the guest physical address, in bytes, of the beginning of the range to query. This address must be page-aligned.

RangeSizeInBytes

Specifes the size of the range to query, in bytes.

Bitmap

If non-NULL, specifies a pointer to the bitmap to write to. The bitmap must be 8-byte aligned.

BitmapSizeInBytes

Specifies the size of the bitmap, in bytes. The bitmap must be large enough to include one bit per each page, rounded up to an 8-byte value.

If zero, then Bitmap can be NULL. This indicates that the range's dirty state should be cleared without querying the current state.

Return Value

If the function succeeds, the return value is S_OK.

If the specified address range has not been mapped or has not been registered for dirty range tracking, the return value is WHV_E_GPA_RANGE_NOT_FOUND.

Remarks

To use this function for a given address range, that address range must be mapped with WHvMapGpaRange, specifying the WHvMapGpaRangeFlagTrackDirtyPages flag.