I have dual core Opteron 275 with AMD PowerNow! and frequency scaling.

This is how I boot xen:

kernel$ /boot/$ISADIR/xen.gz console=vga cpufreq=xen dom0_mem=3072M 
dom0_vcpus_pin=false watchdog=false

but when I run xenpm this is what I get:
# xenpm
Xen cpuidle is not enabled!
[CPU0] failed to get max P-state
[CPU1] failed to get max P-state
[CPU2] failed to get max P-state
[CPU3] failed to get max P-state

Is power management supported (build 127)? Why am I getting this error?

Thank you in advance.
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