[PATCH v5 15/31] powernv/fadump: support copying multiple kernel boot memory regions
Hari Bathini
hbathini at linux.ibm.com
Thu Sep 5 06:20:18 AEST 2019
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..
- Hari
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