I began to implement the acpi cpuidle driver so that the power saving feature can benefit all x86 platforms(In theory although). The acpi is more complicated than I thought. The main time is spent on implementing “_CST” evaluation and decoding.
This is a companion discussion topic for the original entry at https://www.haiku-os.org/blog/yongcong/2012-08-05_cpuidle_three_quarter_term_report/