[sillywalk]

I believe it was the memory controller that needed a binary blob.[0]

[ The next Raptor OpenPOWER systems are coming, but they won't be Power10 ] ( https://news.ycombinator.com/item?id=37963941 )

[0] [ In the future even your RAM will have firmware; and the subject of POWER10 blobs ] ( https://news.ycombinator.com/item?id=26029798 )