Q: To see my machine’s virtualization capabilities, I’m trying to run Coreinfo -v on my Hyper-V server, but I'm not getting detailed information. Why not?

A: Coreinfo -v  gives information on the processor capabilities, but if Hyper-V is already enabled, then the parent partition where you run Coreinfo may not be able to get full information because the hypervisor is intercepting access to the CPU and potentially limiting the program’s view of the hardware.

If so, you need to disable the hypervisor and reboot to get full information, which is done via the CPUID and RDMSR instructions.

To see what the output looks like when Coreinfo –v works, see the FAQ I previously wrote (“Q: How can I easily check if my hardware supports virtualization features such as Second Level Address Translation?”).