[PATCH v2 0/2] ARM: configs: Enable the TEO cpuidle governor in multi-platform defconfigs

[PATCH v2 0/2] ARM: configs: Enable the TEO cpuidle governor in multi-platform defconfigs

[Linus Walleij]

Enable the Timer Events Oriented (TEO) cpuidle governor in the ARM
multi_v5 and multi_v7 defconfigs.

The upsides of the TEO governor are described in
commit b26bf6ab716f27955e2a503ffca1691582127cbb
"cpuidle: New timer events oriented governor for tickless systems"
by Rafael.

We need to gain some traction for this governor.

Both defconfigs already enable CPU_IDLE and NO_HZ_IDLE. Selecting
CPU_IDLE_GOV_TEO suppresses Kconfig's automatic menu selection, so TEO
becomes the default governor on these tickless configurations.

Leave multi_v4t_defconfig unchanged. It uses periodic ticks, which
select the ladder governor and give it a higher runtime rating than
TEO. Enabling TEO alone would not make it the default.

Configuration generation was checked for both patches. No hardware
runtime testing was performed.

Prepared with OpenAI Codex assistance.

Signed-off-by: Linus Walleij <linusw@kernel.org>
---
Changes in v2:
- Explain the TEO selection rationale in both patch changelogs.
- Link to v1: https://patch.msgid.link/20261104-multi-timers-cpufreq-cpuidle-v1-0-c7fd14706715@kernel.org

---
Linus Walleij (2):
      ARM: configs: multi_v5: Enable the TEO cpuidle governor
      ARM: configs: multi_v7: Enable the TEO cpuidle governor

 arch/arm/configs/multi_v5_defconfig | 1 +
 arch/arm/configs/multi_v7_defconfig | 1 +
 2 files changed, 2 insertions(+)
---
base-commit: 6628e7d4c6b25c8d18f1345e3a20d21829aae7e4
change-id: 20261104-multi-timers-cpufreq-cpuidle-5da23033d9bf

Best regards,
--  
Linus Walleij <linusw@kernel.org>

[PATCH v2 1/2] ARM: configs: multi_v5: Enable the TEO cpuidle governor

[Linus Walleij]

The TEO governor introduced in commit b26bf6ab716f ("cpuidle: New
timer events oriented governor for tickless systems") takes a different
approach to idle-state prediction from menu. The governor gives a
better behaviour than the current default for tickless idle systems,
and for the multi-platform configs that enable tickless idle, this
should be the default governor.

multi_v5_defconfig already enables CPU_IDLE and NO_HZ_IDLE. Selecting
CPU_IDLE_GOV_TEO suppresses Kconfig's automatic menu selection, making
TEO the default governor for this tickless configuration.

Signed-off-by: Linus Walleij <linusw@kernel.org>
---
 arch/arm/configs/multi_v5_defconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/configs/multi_v5_defconfig b/arch/arm/configs/multi_v5_defconfig
index a0d2fb2fcf9a..5e5c3dba1d72 100644
--- a/arch/arm/configs/multi_v5_defconfig
+++ b/arch/arm/configs/multi_v5_defconfig
@@ -34,6 +34,7 @@ CONFIG_CPU_FREQ=y
 CONFIG_CPU_FREQ_STAT=y
 CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
 CONFIG_CPU_IDLE=y
+CONFIG_CPU_IDLE_GOV_TEO=y
 CONFIG_ARM_KIRKWOOD_CPUIDLE=y
 CONFIG_KPROBES=y
 CONFIG_MODULES=y

-- 
2.56.0

[PATCH v2 2/2] ARM: configs: multi_v7: Enable the TEO cpuidle governor

[Linus Walleij]

The TEO governor introduced in commit b26bf6ab716f ("cpuidle: New
timer events oriented governor for tickless systems") takes a different
approach to idle-state prediction from menu. The governor gives a
better behaviour than the current default for tickless idle systems,
and for the multi-platform configs that enable tickless idle, this
should be the default governor.

multi_v7_defconfig already enables CPU_IDLE and NO_HZ_IDLE. Selecting
CPU_IDLE_GOV_TEO suppresses Kconfig's automatic menu selection, making
TEO the default governor for this tickless configuration.

Signed-off-by: Linus Walleij <linusw@kernel.org>
---
 arch/arm/configs/multi_v7_defconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/configs/multi_v7_defconfig b/arch/arm/configs/multi_v7_defconfig
index 069d5a49f01c..b583c5db8210 100644
--- a/arch/arm/configs/multi_v7_defconfig
+++ b/arch/arm/configs/multi_v7_defconfig
@@ -121,6 +121,7 @@ CONFIG_ARM_RASPBERRYPI_CPUFREQ=y
 CONFIG_ARM_SCMI_CPUFREQ=y
 CONFIG_QORIQ_CPUFREQ=y
 CONFIG_CPU_IDLE=y
+CONFIG_CPU_IDLE_GOV_TEO=y
 CONFIG_ARM_CPUIDLE=y
 CONFIG_ARM_PSCI_CPUIDLE=y
 CONFIG_ARM_ZYNQ_CPUIDLE=y

-- 
2.56.0

Re: [PATCH v2 0/2] ARM: configs: Enable the TEO cpuidle governor in multi-platform defconfigs

[Daniel Lezcano]

On 11/5/26 13:10, Linus Walleij wrote:
> Enable the Timer Events Oriented (TEO) cpuidle governor in the ARM
> multi_v5 and multi_v7 defconfigs.
> 
> The upsides of the TEO governor are described in
> commit b26bf6ab716f27955e2a503ffca1691582127cbb
> "cpuidle: New timer events oriented governor for tickless systems"
> by Rafael.
> 
> We need to gain some traction for this governor.
> 
> Both defconfigs already enable CPU_IDLE and NO_HZ_IDLE. Selecting
> CPU_IDLE_GOV_TEO suppresses Kconfig's automatic menu selection, so TEO
> becomes the default governor on these tickless configurations.
> 
> Leave multi_v4t_defconfig unchanged. It uses periodic ticks, which
> select the ladder governor and give it a higher runtime rating than
> TEO. Enabling TEO alone would not make it the default.
> 
> Configuration generation was checked for both patches. No hardware
> runtime testing was performed.
> 
> Prepared with OpenAI Codex assistance.
> 
> Signed-off-by: Linus Walleij <linusw@kernel.org>

Reviewed-by: Daniel Lezcano <daniel.lezcano@oss.qualcomm.com>

Re: [PATCH v2 1/2] ARM: configs: multi_v5: Enable the TEO cpuidle governor

[Krzysztof Kozlowski]

On 05/11/2026 13:10, Linus Walleij wrote:
> The TEO governor introduced in commit b26bf6ab716f ("cpuidle: New
> timer events oriented governor for tickless systems") takes a different
> approach to idle-state prediction from menu. The governor gives a
> better behaviour than the current default for tickless idle systems,
> and for the multi-platform configs that enable tickless idle, this
> should be the default governor.
> 
> multi_v5_defconfig already enables CPU_IDLE and NO_HZ_IDLE. Selecting
> CPU_IDLE_GOV_TEO suppresses Kconfig's automatic menu selection, making
> TEO the default governor for this tickless configuration.
> 
> Signed-off-by: Linus Walleij <linusw@kernel.org>
> ---
>  arch/arm/configs/multi_v5_defconfig | 1 +
>  1 file changed, 1 insertion(+)

Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>

Best regards,
Krzysztof

Re: [PATCH v2 2/2] ARM: configs: multi_v7: Enable the TEO cpuidle governor

[Krzysztof Kozlowski]

On 05/11/2026 13:10, Linus Walleij wrote:
> The TEO governor introduced in commit b26bf6ab716f ("cpuidle: New
> timer events oriented governor for tickless systems") takes a different
> approach to idle-state prediction from menu. The governor gives a
> better behaviour than the current default for tickless idle systems,
> and for the multi-platform configs that enable tickless idle, this
> should be the default governor.
> 
> multi_v7_defconfig already enables CPU_IDLE and NO_HZ_IDLE. Selecting
> CPU_IDLE_GOV_TEO suppresses Kconfig's automatic menu selection, making
> TEO the default governor for this tickless configuration.
> 
> Signed-off-by: Linus Walleij <linusw@kernel.org>


Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>

Best regards,
Krzysztof