Changeset 17195 in vbox for trunk/src/VBox/VMM/VMMAll/PGMAll.cpp

Timestamp:

Feb 27, 2009 11:02:41 AM (16 years ago)

Author:

vboxsync

Message:

VBOX_WITH_PGMPOOL_PAGING_ONLY: deal with hypervisor mappings in guest pae pds that are not yet present

File:

• trunk/src/VBox/VMM/VMMAll/PGMAll.cpp (modified) (1 diff)

trunk/src/VBox/VMM/VMMAll/PGMAll.cpp

@@ -902 +902 @@
             if (CPUMGetGuestCR4(pVM) & X86_CR4_PAE)
             {
-                GCPdPt  = pGstPdpe->u & X86_PDPE_PG_MASK;
-                enmKind = PGMPOOLKIND_PAE_PD_FOR_PAE_PD;
+                if (!pGstPdpe->n.u1Present)
+                {
+                    /* PD not present; guest must reload CR3 to change it.
+                     * No need to monitor anything in this case.
+                     */
+                    Assert(!HWACCMIsEnabled(pVM));
+
+                    GCPdPt  = pGstPdpe->u & X86_PDPE_PG_MASK;
+                    enmKind = PGMPOOLKIND_PAE_PD_PHYS;
+                    pGstPdpe->n.u1Present = 1;
+                }
+                else
+                {
+                    GCPdPt  = pGstPdpe->u & X86_PDPE_PG_MASK;
+                    enmKind = PGMPOOLKIND_PAE_PD_FOR_PAE_PD;
+                }
             }
             else