> This change works around this problem by taking out the PMU
> information from the cputable entries for the logical PVR values, and
> changing identify_cpu so that the second call to it won't overwrite
> the PMU information that was established by the first call (the one
> with the real PVR), bu
Some IBM machines supply a "logical" PVR (processor version register)
value in the device tree in the cpu nodes rather than the real PVR.
This is used for instance to indicate that the processors in a POWER6
partition have been configured by the hypervisor to run in POWER5+
mode rather than POWER6
