@benjojo @asl I think you can get OpenBMC on HPE machines provided you follow their "Transfer of ownership" procedure
The rl300 is supported for sure, other x86 platforms from g11 are supported as well iirc
(See https://m.youtube.com/watch?v=21kiLA1DVSU )
Hope it helps !
@asl Most non OpenBMC/OpenIPMI systems are the same vendor just reskinned, American Megatrends MegaRAC
I don't really have great things to say about Dell/HPE either