Mike Banon has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/37684 )
Change subject: AGESA: Disable CBMEM_STAGE_CACHE by default ......................................................................
Patch Set 2: Code-Review+1
S3 Suspend is working fine on AM1I-A with this change installed and CBMEM_STAGE_CACHE disabled at .config. G505S does not boot because of amd_iommu_init_pci Linux kernel panic - however, I know it's caused not by your change but by some unfortunate parent ( I had exactly the same problem with coreboot cloned a few days ago ). This problem didn't happen with 50b82ef2bb44602a62d676f2b9c6900da0ad4162 this morning's master, so perhaps these commit series should be rebased on top of master before I could test it again on G505S.