Changeset 101001 in vbox for trunk/src/VBox/VMM/VMMR3

Timestamp:

Sep 1, 2023 1:57:59 PM (15 months ago)

Author:

vboxsync

Message:

VMM: Nested VMX: bugref:10318 Fix performance issue with Hyper-V enabled Windows Server 2012 R2 guests.

File:

• trunk/src/VBox/VMM/VMMR3/PGM.cpp (modified) (1 diff)

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

@@ -1729 +1729 @@
         /* We currently do -not- shadow reserved bits in guest page tables but instead trap them using non-present permissions,
            see todo in (NestedSyncPT). */
-        pVCpu->pgm.s.fGstEptShadowedPteMask    = EPT_PRESENT_MASK | EPT_E_MEMTYPE_MASK | EPT_E_IGNORE_PAT;
+        pVCpu->pgm.s.fGstEptShadowedPteMask    = EPT_PRESENT_MASK;
         pVCpu->pgm.s.fGstEptShadowedPdeMask    = EPT_PRESENT_MASK;
-        pVCpu->pgm.s.fGstEptShadowedBigPdeMask = EPT_PRESENT_MASK | EPT_E_MEMTYPE_MASK | EPT_E_IGNORE_PAT | EPT_E_LEAF;
-        pVCpu->pgm.s.fGstEptShadowedPdpteMask  = EPT_PRESENT_MASK | EPT_E_MEMTYPE_MASK | EPT_E_IGNORE_PAT | EPT_E_LEAF;
+        pVCpu->pgm.s.fGstEptShadowedBigPdeMask = EPT_PRESENT_MASK | EPT_E_LEAF;
+        pVCpu->pgm.s.fGstEptShadowedPdpteMask  = EPT_PRESENT_MASK;
         pVCpu->pgm.s.fGstEptShadowedPml4eMask  = EPT_PRESENT_MASK | EPT_PML4E_MBZ_MASK;
         /* If mode-based execute control for EPT is enabled, we would need to include bit 10 in the present mask. */