Linux 5.8 Has The Bits Needed To Begin Booting POWER10 Processors
There has been a lot of POWER10 open-source enablement already happening from the Linux kernel to code compilers and other key components. Now with the Linux 5.8 kernel is enough code to have initial support for booting on POWER10 hardware. Granted, outside of IBM / OpenPOWER and key partners, it will still be some months (and more kernel releases down the road) before seeing the hardware and thus more time still to get the support squared away -- hopefully in time for the the spring 2021 Linux distributions.
Besides having initial boot support for POWER10, Linux 5.8 also brings POWER10 prefixed instructions support.
On the POWER9 front, the Linux 5.8 kernel does bring support for exposing the hardware's GZIP accelerator to user-space. This allows modified user-space programs to submit requests directly to the on-chip accelerator for GZIP offload.
More details on the POWER changes for the 5.8 cycle via this Git merge.