Implement IPMI POH functionality

[Alexander Amelkin]

28.03.2018 16:38, Brad Bishop wrote:
>> 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?
Yes.
>
>> ‘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?
Absolutely. We may want to have an OEM command to reset the POH counter,
but I would prefer to only have a special tool available via shell under
root account, and not let this counter be reset via IPMI or REST.

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