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| author |   Daniel Lezcano <daniel.lezcano@linaro.org> | 2020-04-29 12:36:39 +0200 |
|---|---|---|
| committer | Daniel Lezcano <daniel.lezcano@linaro.org> | 2020-05-19 12:54:05 +0200 |
| commit | 333cff6c963fbc8b9820ca2b6a8b2e22a572cd43 (patch) | |
| tree | 270067d377010903156d0a116f5c12b73350a12f /include/linux/idle_inject.h | |
| parent | thermal/drivers/ti-soc-thermal: Avoid dereferencing ERR_PTR (diff) | |
| download | wireguard-linux-333cff6c963fbc8b9820ca2b6a8b2e22a572cd43.tar.xz wireguard-linux-333cff6c963fbc8b9820ca2b6a8b2e22a572cd43.zip | |
powercap/drivers/idle_inject: Specify idle state max latency
Currently the idle injection framework uses the play_idle() function
which puts the current CPU in an idle state. The idle state is the
deepest one, as specified by the latency constraint when calling the
subsequent play_idle_precise() function with the INT_MAX.
The idle_injection is used by the cpuidle_cooling device which
computes the idle / run duration to mitigate the temperature by
injecting idle cycles. The cooling device has no control on the depth
of the idle state.
Allow finer control of the idle injection mechanism by allowing to
specify the latency for the idle state. Thus the cooling device has
the ability to have a guarantee on the exit latency of the idle states
it is injecting.
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org>
Link: https://lore.kernel.org/r/20200429103644.5492-1-daniel.lezcano@linaro.org
Diffstat (limited to 'include/linux/idle_inject.h')
| -rw-r--r-- | include/linux/idle_inject.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/idle_inject.h b/include/linux/idle_inject.h index a445cd1a36c5..91a8612b8bf9 100644 --- a/include/linux/idle_inject.h +++ b/include/linux/idle_inject.h @@ -26,4 +26,8 @@ void idle_inject_set_duration(struct idle_inject_device *ii_dev, void idle_inject_get_duration(struct idle_inject_device *ii_dev, unsigned int *run_duration_us, unsigned int *idle_duration_us); + +void idle_inject_set_latency(struct idle_inject_device *ii_dev, + unsigned int latency_ns); + #endif /* __IDLE_INJECT_H__ */ |