On Thu, Mar 13, 2025 at 07:45:50PM +0530, Avnish Chouhan wrote:
> Change RMA size from 512 MB to 768 MB which will result
> in more memory at boot time for PowerPC. When vTPM, Secure Boot or
> FADump are enabled on PowerPC, the 512 MB RMA memory is not sufficient for
> booting. With this 512 MB RMA, GRUB2 runs out of memory and fails to
> boot the machine. Sometimes even usage of CDROM requires more memory
> for installation and along with the options mentioned above exhausts
> the boot memory which results in boot failures. Increasing the RMA size
> will resolves multiple out of memory issues observed in PowerPC.
>
> Failure details (GRUB2 debugs):
>
>   kern/ieee1275/init.c:550: mm requested region of size 8513000, flags 1
>   kern/ieee1275/init.c:563: Cannot satisfy allocation and retain minimum 
> runtime space
>   kern/ieee1275/init.c:550: mm requested region of size 8513000, flags 0
>   kern/ieee1275/init.c:563: Cannot satisfy allocation and retain minimum 
> runtime space
>   kern/file.c:215: Closing `/ppc/ppc64/initrd.img' ...
>   kern/disk.c:297: Closing 
> `ieee1275//vdevice/v-scsi@30000067/disk@8300000000000000'...
>   kern/disk.c:311: Closing 
> `ieee1275//vdevice/v-scsi@30000067/disk@8300000000000000' succeeded.
>   kern/file.c:225: Closing `/ppc/ppc64/initrd.img' failed with 3.
>   kern/file.c:148: Opening `/ppc/ppc64/initrd.img' succeeded.
>   error: ../../grub-core/kern/mm.c:552:out of memory.
>
> Signed-off-by: Avnish Chouhan <avn...@linux.ibm.com>

Reviewed-by: Daniel Kiper <daniel.ki...@oracle.com>

Daniel

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