Changeset 4714 in vbox for trunk/src/VBox/VMM/PGM.cpp

Timestamp:

Sep 11, 2007 4:30:42 PM (17 years ago)

Author:

vboxsync

Message:

ZeroPg

File:

• trunk/src/VBox/VMM/PGM.cpp (modified) (4 diffs)

trunk/src/VBox/VMM/PGM.cpp

@@ -925 +925 @@
         return rc;
 
-    /* Initialise PGM critical section. */
+    /* 
+     * Initialize the PGM critical section and flush the phys TLBs
+     */
     rc = PDMR3CritSectInit(pVM, &pVM->pgm.s.CritSect, "PGM");
     AssertRCReturn(rc, rc);
 
-    /* 
-     * Invalidate the TLBs.
-     */
     PGMR3PhysChunkInvalidateTLB(pVM);
     PGMPhysInvalidatePageR3MapTLB(pVM);
@@ -944 +943 @@
     {
         pVM->pgm.s.pTreesGC = MMHyperHC2GC(pVM, pVM->pgm.s.pTreesHC);
+
+        /*
+         * Alocate the zero page.
+         */
+        rc = MMHyperAlloc(pVM, PAGE_SIZE, PAGE_SIZE, MM_TAG_PGM, &pVM->pgm.s.pvZeroPgR3);
+    }
+    if (VBOX_SUCCESS(rc))
+    {
+        pVM->pgm.s.pvZeroPgGC = MMHyperR3ToGC(pVM, pVM->pgm.s.pvZeroPgR3);
+        pVM->pgm.s.pvZeroPgR0 = MMHyperR3ToR0(pVM, pVM->pgm.s.pvZeroPgR3);
+        AssertRelease(pVM->pgm.s.pvZeroPgR0 != NIL_RTHCPHYS);
+        pVM->pgm.s.HCPhysZeroPg = MMR3HyperHCVirt2HCPhys(pVM, pVM->pgm.s.pvZeroPgR3);
+        AssertRelease(pVM->pgm.s.HCPhysZeroPg != NIL_RTHCPHYS);
 
         /*
@@ -995 +1007 @@
         return VINF_SUCCESS;
     }
-    /* No cleanup necessary, MM frees all memory. */
+
+    /* Almost no cleanup necessary, MM frees all memory. */
+    PDMR3CritSectDelete(&pVM->pgm.s.CritSect);
 
     return rc;
@@ -1608 +1622 @@
     pVM->pgm.s.paDynPageMapPaePTEsGC += offDelta;
     pVM->pgm.s.pbDynPageMapBaseGC += offDelta;
+
+    /*
+     * The Zero page.
+     */
+    pVM->pgm.s.pvZeroPgR0 = MMHyperR3ToR0(pVM, pVM->pgm.s.pvZeroPgR3);
+    AssertRelease(pVM->pgm.s.pvZeroPgR0);
 
     /*