[v2,1/3] arm64: defconfig: Enable CONFIG_ENERGY_MODEL
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Message ID 20190417094301.17622-2-quentin.perret@arm.com
State Superseded
Delegated to: Eduardo Valentin
Headers show
  • Make IPA use PM_EM
Related show

Commit Message

Quentin Perret April 17, 2019, 9:42 a.m. UTC
The recently introduced Energy Model (EM) framework manages power cost
tables for the CPUs of the system. Its only user right now is the
scheduler, in the context of Energy Aware Scheduling (EAS).

However, the EM framework also offers a generic infrastructure that
could replace subsystem-specific implementations of the same concepts,
as this is the case in the thermal framework.

So, in order to prepare the migration of the thermal subsystem to use
the EM framework, enable it in the default arm64 defconfig, which is the
most commonly used architecture for IPA. This will also compile-in all
of the EAS code, although it won't be enabled by default -- EAS requires
to use the 'schedutil' CPUFreq governor while arm64 defaults to

Signed-off-by: Quentin Perret <quentin.perret@arm.com>
 arch/arm64/configs/defconfig | 1 +
 1 file changed, 1 insertion(+)

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diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index 2d9c39033c1a..4881a752ab3f 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -97,6 +97,7 @@  CONFIG_XEN=y