Changeset 65576 in vbox for trunk/src/VBox/Devices/PC/DevACPI.cpp

Timestamp:

Feb 1, 2017 8:04:19 PM (8 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

113229

Message:

DevACPI: 64-bit prefetch window is 1G-aligned, mostly paranoia

File:

• trunk/src/VBox/Devices/PC/DevACPI.cpp (modified) (1 diff)

trunk/src/VBox/Devices/PC/DevACPI.cpp

@@ -3132 +3132 @@
     /*
      * Calculate the sizes for the low region and for the 64-bit prefetchable memory.
+     * The latter starts never below 4G and is 1G-aligned.
      */
     const uint64_t offRamHole = _4G - cbRamHole;
     if (pThis->fPciPref64Enabled)
-        pThis->u64PciPref64 = pThis->u64RamSize  < _4G ? _4G : pThis->u64RamSize; /* MEM4 */
+        pThis->u64PciPref64 = pThis->u64RamSize  < _4G ? _4G : RT_ALIGN_64(pThis->u64RamSize, _1G); /* MEM4 */
     uint64_t cbRamLow = offRamHole < pThis->u64RamSize ? offRamHole : pThis->u64RamSize;
     if (cbRamLow > UINT32_C(0xffe00000)) /* See MEM3. */