[PATCH v2] powerpc: increase MIN RMA size for CAS negotiation

[Sourabh Jain]

Hello Maddy,


On 22/01/25 18:13, Madhavan Srinivasan wrote:
> On Fri, 06 Dec 2024 12:25:45 +0530, Avnish Chouhan wrote:
>> Change RMA size from 512 MB to 768 MB which will result
>> in more RMA at boot time for PowerPC. When PowerPC LPAR use/uses vTPM,
>> Secure Boot or FADump, the 512 MB RMA memory is not sufficient for
>> booting. With this 512 MB RMA, GRUB2 run out of memory and unable to
>> load the necessary. Sometimes even usage of CDROM which requires more
>> memory for installation along with the options mentioned above troubles
>> the boot memory and result in boot failures. Increasing the RMA size
>> will resolves multiple out of memory issues observed in PowerPC.
>>
>> [...]
> Applied to powerpc/next.
>
> [1/1] powerpc: increase MIN RMA size for CAS negotiation
>        https://git.kernel.org/powerpc/c/ae908b87b6bb32c170e9baf5858f2a7553cacc06
I posted a patch series that includes this patch along with patches to 
avoid the impact on fadump due to the `MIN_RMA` change introduced in 
this patch. 
https://lore.kernel.org/all/20250123114254.200527-1-sourabhjain@linux.ibm.com/ 
The patches in the above patch series are arranged to ensure they do not 
break `git bisect`. Previously, we tested this patch and the fadump 
changes together but sent them separately, which I now realize was not 
the best approach. If possible, please consider accepting the entire 
patch series as a whole. 
https://lore.kernel.org/all/20250123114254.200527-1-sourabhjain@linux.ibm.com/ 
We have included test cases for the above patch series and a changelog 
explaining additional details in the cover letter. Please let me know if 
you have queries regarding this. Thanks, Sourabh Jain