ACPI: cpuidle: Support C1 idle time accounting
Show C1 idle time in /sysfs cpuidle interface. C1 idle time may not be entirely accurate in all cases. It includes the time spent in the interrupt handler after wakeup with "hlt" based C1. But, it will be accurate with "mwait" based C1. Signed-off-by: NVenkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: NLen Brown <len.brown@intel.com>
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