How to detect if an application is running under KVM?

I already know how to detect VMWare and VirtualPC, but I want to know how to do this in Kernel Virtual Machine. I would like t开发者_开发技巧he code to be in C or C++.

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This page implies that it's enough to check the kernel's boot messages, if Linux is your hosted OS:

 # dmesg | grep -i virtual
 CPU: AMD QEMU Virtual CPU version 0.9.1 stepping 03

That should be easy enough to implement in C.