Implement IPMI POH functionality

[Brad Bishop]

> On Mar 28, 2018, at 8:56 AM, Alexander Amelkin <a.amelkin at yadro.com> wrote:
>> On Mon, Mar 26, 2018 at 5:00 AM Ratan Gupta <ratagupt at linux.vnet.ibm.com> wrote:
>> 
>>     2) Don't update this property for the chassis power off duration and
>> update
>>     this property when the chassis state changes to PowerOn.
> I believe, we must follow the IPMI specification, which clearly states in section 1.7.28 that the POH counter is:
> 
> "to return a counter value proportional to the system operating (S0) power-on hours"
> 
> It looks quite clear to me that this is similar to a car mileage meter. That is, a means to identify when it's time to do some servicing and/or track warranty.

Agreed.  So option #2 then Alexander?

> ‘Clear’ or ‘Set’ commands are not specified for this counter. This is because the counter is most typically used for
> warranty tracking or replacement purposes where changing or clearing the counter would defeat the purpose.

So I take this as you don’t feel a factory reset should
reset the counter, at least, certainly not by default.  Agreed?