Power9 Feature History

Matrix of notable Power9-related features and which kernel version they were introduced in.

This does not take into account backports to stable branches.

Kernel Version	Host	Guest
4.6	Raw CPU table entry
4.7	Radix MMU
4.8	PMU Support
4.9
4.10
4.11		P9 mode (non-compat), Architected CPU table entry1
4.12		PMU fixes. DD1 idle fixes.
4.13
4.14	IMC PMU. Page fault rework. Idle in virtual mode. VAS. P9 scheduler topology.
4.15	Vector CI workarounds. TM no suspend.
4.16
4.17	DAWR disabled.	DAWR disabled.

[1]: Boot properly on PowerVM.