Changeset 26990 in vbox for trunk/src/VBox/VMM/CPUM.cpp

Timestamp:

Mar 3, 2010 1:57:20 PM (15 years ago)

Author:

vboxsync

Message:

HTT doesn't make sense in single cpu configs

File:

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

trunk/src/VBox/VMM/CPUM.cpp

@@ -568 +568 @@
         /* If CPUID Fn0000_0001_EDX[HTT] = 1 then LogicalProcessorCount is the number of threads per CPU core times the number of CPU cores per processor */
         pCPUM->aGuestCpuIdStd[1].ebx |= (pVM->cCpus << 16);
-        pCPUM->aGuestCpuIdStd[1].edx |= X86_CPUID_FEATURE_EDX_HTT;  /* necessary for hyper-threading *or* multi-core CPUs */
+        if (pVM->cCpus > 1)
+            pCPUM->aGuestCpuIdStd[1].edx |= X86_CPUID_FEATURE_EDX_HTT;  /* necessary for hyper-threading *or* multi-core CPUs */
     }
 #endif