Changeset 103981 in vbox for trunk/src/VBox/Additions/WINNT/Graphics/Video

Timestamp:

Mar 21, 2024 10:37:16 AM (10 months ago)

Author:

vboxsync

Message:

WDDM: alignment

File:

• trunk/src/VBox/Additions/WINNT/Graphics/Video/mp/wddm/gallium/VBoxMPDX.cpp (modified) (2 diffs)

trunk/src/VBox/Additions/WINNT/Graphics/Video/mp/wddm/gallium/VBoxMPDX.cpp

@@ -727 +727 @@
                  || pBuildPagingBuffer->Fill.Destination.SegmentId == pAllocation->dx.SegmentId, STATUS_INVALID_PARAMETER);
 
+    /* "The size value is expanded to a multiple of the native host page size (for example, 4 KB on the x86 architecture)."
+     * I.e. TransferOffset and TransferSize are within the aligned size.
+     */
+    SIZE_T const cbAllocation = RT_ALIGN_32(svgaGetAllocationSize(pAllocation), PAGE_SIZE);
+
     NTSTATUS Status = STATUS_SUCCESS;
     switch (pBuildPagingBuffer->Fill.Destination.SegmentId)
@@ -763 +768 @@
 
             /* Fill the guest backing pages. */
-            uint32_t const cbFill = RT_MIN(pBuildPagingBuffer->Fill.FillSize, pAllocation->dx.desc.cbAllocation);
+            uint32_t const cbFill = RT_MIN(pBuildPagingBuffer->Fill.FillSize, cbAllocation);
             ASMMemFill32(pvDst, cbFill, pBuildPagingBuffer->Fill.FillPattern);