[Xen-devel] VMM detection

["Wu Bingzheng" <wubingzheng@xxxxxxx>]

Hi men,

If there is an application who wants to detect what
the OS is running on, physical hardware or Xen,
can he do it like this:

using SGDT to get GDT's address.

If its address is 0xCxxxxxxx, then it's on physical hardware (the OS is Linux)
If the address is 0xFxxxxxxx (0xFE820000), then it's on Xen.

I test it, and it works.

Can Xen do something to prevent this?

Thanks,
Wu

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