[PATCH v4 11/25] powernv/fadump: register kernel metadata address with opal

[Hari Bathini]

On 14/08/19 3:51 PM, Mahesh Jagannath Salgaonkar wrote:
> On 8/14/19 12:36 PM, Hari Bathini wrote:
>>
>>
>> On 13/08/19 4:11 PM, Mahesh J Salgaonkar wrote:
>>> On 2019-07-16 17:03:15 Tue, Hari Bathini wrote:
>>>> OPAL allows registering address with it in the first kernel and
>>>> retrieving it after MPIPL. Setup kernel metadata and register its
>>>> address with OPAL to use it for processing the crash dump.
>>>>
>>>> Signed-off-by: Hari Bathini <hbathini at linux.ibm.com>
>>>> ---
[...]
>>
>>> What if kernel crashes before metadata area is initialized ?
>>
>> registered_regions would be '0'. So, it is treated as fadump is not registered case.
>> Let me
>> initialize metadata explicitly before registering the address with f/w to avoid any assumption...
> 
> Do you want to do that before memblock reservation ? Should we move this
> to setup_fadump() ?

Better here as failing early would mean we could fall back to KDump..