Changeset 102805 in vbox for trunk

Timestamp:

Jan 10, 2024 3:52:33 AM (13 months ago)

Author:

vboxsync

Message:

VMM/CPUM: bugref:10498 Comment nit.

File:

trunk/src/VBox/VMM/VMMR3/CPUM.cpp

-              r102804
+              r102805
     if (pMtrrMap->idxMtrr < pMtrrMap->cMtrrs)
+    {
+        /*
+         * We must ensure the physical-address does not exceed the maximum guest-physical address width.
+         * Otherwise, the MTRR physical mask computation gets totally busted rather than returning 0 to
+         * indicate such mapping is impossible.
+         */
         RTGCPHYS const GCPhysLastMax = RT_BIT_64(pVM->cpum.s.GuestFeatures.cMaxPhysAddrWidth) - 1U;
         if (GCPhysLast <= GCPhysLastMax)

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