Changeset 44452 in vbox for trunk

Timestamp:

Jan 30, 2013 9:14:45 AM (12 years ago)

Author:

vboxsync

Message:

doc/manual, VMM: clarify the host/guest combinations we support NX

Location:

trunk

Files:

• doc/manual/en_US/user_KnownIssues.xml (modified) (1 diff)
• src/VBox/VMM/VMMR3/HM.cpp (modified) (2 diffs)

trunk/doc/manual/en_US/user_KnownIssues.xml

@@ -80 +80 @@
           experience this, do not attempt to execute 64-bit guests. Refer to the
           VirtualBox user forum for additional information.</para>
+        </listitem>
+
+        <listitem>
+          <para><emphasis role="bold">NX (no execute, data execution
+          prevention)</emphasis> only works for guests running on 64-bit hosts
+          or guests running 32-bit hosts with PAE enabled and requires that
+          hardware virtualization be enabled.</para>
         </listitem>
     

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

@@ -1239 +1239 @@
                     CPUMSetGuestCpuIdFeature(pVM, CPUMCPUIDFEATURE_LAHF);
                     CPUMSetGuestCpuIdFeature(pVM, CPUMCPUIDFEATURE_NX);
+# if RT_ARCH_X86
+                    LogRel(("NX is only supported for 64-bit guests!\n"));
+# endif
                 }
                 else
@@ -1246 +1249 @@
                     &&  (pVM->hm.s.vmx.hostEFER & MSR_K6_EFER_NXE))
                     CPUMSetGuestCpuIdFeature(pVM, CPUMCPUIDFEATURE_NX);
+                else
+                    LogRel(("HM: NX not supported by the host\n"));
 
                 LogRel((pVM->hm.s.fAllow64BitGuests