diff options
| author | Ulf Hansson <ulf.hansson@linaro.org> | 2025-11-25 12:26:42 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2025-11-25 19:01:29 +0100 |
| commit | a4e6512a79d8486dccf3e8b066e5d6bd5ff95446 (patch) | |
| tree | 1d132eb603be534dd9a5b7563944ac37684327cf /kernel/power/Kconfig | |
| parent | ac3fd01e4c1efce8f2c054cdeb2ddd2fc0fb150d (diff) | |
PM: QoS: Introduce a CPU system wakeup QoS limit
Some platforms supports multiple low power states for CPUs that can be used
when entering system-wide suspend. Currently we are always selecting the
deepest possible state for the CPUs, which can break the system wakeup
latency constraint that may be required for a use case.
Let's take the first step towards addressing this problem, by introducing
an interface for user space, that allows us to specify the CPU system
wakeup QoS limit. Subsequent changes will start taking into account the new
QoS limit.
Reviewed-by: Dhruva Gole <d-gole@ti.com>
Reviewed-by: Kevin Hilman (TI) <khilman@baylibre.com>
Tested-by: Kevin Hilman (TI) <khilman@baylibre.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://patch.msgid.link/20251125112650.329269-2-ulf.hansson@linaro.org
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'kernel/power/Kconfig')
| -rw-r--r-- | kernel/power/Kconfig | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig index 54a623680019..05337f437cca 100644 --- a/kernel/power/Kconfig +++ b/kernel/power/Kconfig @@ -202,6 +202,17 @@ config PM_WAKELOCKS_GC depends on PM_WAKELOCKS default y +config PM_QOS_CPU_SYSTEM_WAKEUP + bool "User space interface for CPU system wakeup QoS" + depends on CPU_IDLE + help + Enable this to allow user space via the cpu_wakeup_latency file to + specify a CPU system wakeup latency limit. + + This may be particularly useful for platforms supporting multiple low + power states for CPUs during system-wide suspend and s2idle in + particular. + config PM bool "Device power management core functionality" help |