[SRU U/L/K/J] Adjust balanced governor for Sappire Rapids

[Stefan Bader]

BugLink: https://bugs.launchpad.net/bugs/2008519

The goal is to adjust the behavior of the balanced governor for certain Xeon
CPUs (those are CPUs rather seen in servers so there should be no impact on
laptop users). While the initial request was Jammy/5.15 only we should do
this to Kinetic and Lunar as well so the experience is the same regardless of
release.

== Fix ==
This picks one change from v6.3-rc1 which tweaks the intel_idle driver for a
specific CPU model. For Jammy/5.15 this requires one additional change
which introduces the EPP tweak for Alderlake.

== Regression Potential ==
The change modifies how quickly CPUs scale up (and probably down) depending on
workload. Power usage unlikely is of that much concern in server space. Maybe
increased heat would be observed.
For Jammy there is the additional risk of havind a different power usage
on Alderlake which is a Laptop CPU. However that change is part of v5.17
and thus would already be in effect with current 22.04 HWE.


Srinivas Pandruvada (1):
  cpufreq: intel_pstate: Adjust balance_performance EPP for Sapphire
    Rapids

 drivers/cpufreq/intel_pstate.c | 1 +
 1 file changed, 1 insertion(+)

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