Agner`s CPU blog

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CPUID manipulation through virtualization
Author:  Date: 2010-08-16 08:31
If you do not have a VIA processor, you can also test applications using a VMWare virtual machine. If VMWare is using hardware virtualization, all cpuid instructions are intercepted and hence can be spoofed. Using the following lines in my .vmx file, I can change the vendor_id string from GenuineIntel (I have a Core 2 Duo) to AuthenticAMD:

cpuid.0.ebx="0110:1000:0111:0100:0111:0101:0100:0001"
cpuid.0.edx="0110:1001:0111:0100:0110:1110:0110:0101"
cpuid.0.ecx="0100:0100:0100:1101:0100:0001:0110:0011"

I've verified the behavior of Intel's Compiler using this method...

 
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