[PATCH v5 15/31] powernv/fadump: support copying multiple kernel boot memory regions

[Michael Ellerman]

Hari Bathini <hbathini at linux.ibm.com> writes:
> On 04/09/19 5:00 PM, Michael Ellerman wrote:
>> Hari Bathini <hbathini at linux.ibm.com> writes:
>>> Firmware uses 32-bit field for region size while copying/backing-up
>> 
>> Which firmware exactly is imposing that limit?
>
> I think the MDST/MDRT tables in the f/w. Vasant, which component is that?
>
>>> +	/*
>>> +	 * Firmware currently supports only 32-bit value for size,
>> 
>> "currently" implies it could change in future?
>> 
>> If it does we assume it will only increase, and we're happy that old
>> kernels will continue to use the 32-bit limit?
>
> I am not aware of any plans to make it 64-bit. Let me just say f/w supports
> only 32-bit to get rid of that ambiguity..

OK. As long as everyone is aware that the kernel has no support for it
increasing it, without code changes.

cheers