Changeset 102689 in vbox for trunk/src/VBox/VMM/VMMR3

Timestamp:

Dec 22, 2023 3:44:59 AM (17 months ago)

Author:

vboxsync

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

160856

Message:

VMM/CPUM: bugref:10498 Align guest RAM to 4K pages prior to mapping it via MTRRs.

File:

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

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

@@ -3707 +3707 @@
         return VINF_SUCCESS;
     }
+    if (!(cbRam & ~X86_PAGE_4K_BASE_MASK))
+    { /* likely */ }
+    else
+    {
+        LogRel(("CPUM: WARNING! RAM size %u bytes is not 4K aligned, using %u bytes\n", cbRam, cbRam & X86_PAGE_4K_BASE_MASK));
+        cbRam &= X86_PAGE_4K_BASE_MASK;
+    }
 
     /*