xenpm get-cpufreq-states currently just prints no output when cpufreq is
disabled or HWP is running. Have it print an appropriate message. The
cpufreq disabled one mirrors the cpuidle disabled one.
cpufreq disabled:
$ xenpm get-cpufreq-states
Either Xen cpufreq is disabled or no valid information is registered!
Under HWP:
$ xenpm get-cpufreq-states
P-State information not supported. Try 'get-cpufreq-average' or 'start'.
Also allow xenpm to handle EOPNOTSUPP from the pmstat hypercalls.
EOPNOTSUPP is returned when HWP is active in some cases and allows the
differentiation from cpufreq being disabled.
Signed-off-by: Jason Andryuk <jandryuk@gmail.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Jason Andryuk
18cd984905