Changeset 20463 in vbox for trunk/src/VBox

Timestamp:

Jun 10, 2009 12:25:23 PM (16 years ago)

Author:

vboxsync

Message:

Don't expose X86_CPUID_AMD_ADVPOWER_EDX_TSCINVAR to the guest

File:

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

trunk/src/VBox/VMM/CPUM.cpp

@@ -489 +489 @@
                                             //| X86_CPUID_AMD_ADVPOWER_EDX_MC
                                             //| X86_CPUID_AMD_ADVPOWER_EDX_HWPSTATE
+#if 1
+            /* We don't expose X86_CPUID_AMD_ADVPOWER_EDX_TSCINVAR, because newer Linux kernels blindly assume
+             * that the AMD performance counters work if this is set for 64 bits guests. (can't really find a CPUID feature bit for them though)
+             */
+#else
                                             | X86_CPUID_AMD_ADVPOWER_EDX_TSCINVAR
+#endif
                                             | 0;
         }