Changeset 7646 in vbox

Timestamp:

Mar 31, 2008 11:10:27 AM (17 years ago)

Author:

vboxsync

Message:

Extra check for valid cpuid

File:

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

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

@@ -1048 +1048 @@
         case CPUMCPUIDFEATURE_LONG_MODE:
         {
-            uint32_t ulEdx, ulDummy;
+            uint32_t ulEdx , ulDummy;
 
             ASMCpuId(0x80000001, &ulDummy, &ulDummy, &ulDummy, &ulEdx);
-            if (!(ulEdx & X86_CPUID_AMD_FEATURE_EDX_LONG_MODE))
+            if (    pVM->cpum.s.aGuestCpuIdExt[0].eax < 0x80000001
+                ||  !(ulEdx & X86_CPUID_AMD_FEATURE_EDX_LONG_MODE))
             {
                 AssertMsgFailed(("ERROR: Can't turn on LONG MODE when the host doesn't support it!!\n"));