[Xen-devel] [PATCH 2] Add user PM control interface

["Liu, Jinsong" <jinsong.liu@xxxxxxxxx>]

Add user PM control interface

This patch provide user PM control interface.
Now it only implements cpufreq related interface.

User can use libxc to get cpufreq parameters:
1. common parameter independent on cpufreq governor
    affected_cpus;
    scaling_available_frequencies;
    scaling_available_governors;
    scaling_driver;
    cpuinfo_cur_freq;
    cpuinfo_max_freq;
    cpuinfo_min_freq;
    scaling_max_freq;
    scaling_min_freq;
    scaling_governor
2. parameters depend on specific governor:
    userspace governor: scaling_setspeed;
    ondemand governor:  sampling_rate_max;
                        sampling_rate_min;
                        sampling_rate;
                        up_threshold;

User can also set cpufreq control parameters:
1. common control parameters:
    scaling_governor;
    scaling_max_freq;
    scaling_min_freq;
2. control parameters depend on specific governor:
    userspace governor: scaling_setspeed;
    ondemand governor:  sampling_rate;
                        up_threshold;

Signed-off-by: Liu, Jinsong <jinsong.liu@xxxxxxxxx>

Attachment: px-2-control-interface.patch
Description: px-2-control-interface.patch

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