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| author | Pierre Gondois <Pierre.Gondois@arm.com> | 2022-03-21 12:57:23 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2022-04-13 17:26:17 +0300 |
| commit | fc3a9a9858478ab5f8441765a3f9552a0ceba10c (patch) | |
| tree | 4a85b97562b6d43775f86b7d2892e403d091ce83 /kernel/power | |
| parent | bdc21a4d286c6917fe966fd765de99411095b1b4 (diff) | |
| download | linux-fc3a9a9858478ab5f8441765a3f9552a0ceba10c.tar.xz | |
PM: EM: Add artificial EM flag
The Energy Model (EM) can be used on platforms which are missing real
power information. Those platforms would implement .get_cost() which
populates needed values for the Energy Aware Scheduler (EAS). The EAS
doesn't use 'power' fields from EM, but other frameworks might use them.
Thus, to avoid miss-usage of this specific type of EM, introduce a new
flags which can be checked by other frameworks.
Signed-off-by: Pierre Gondois <Pierre.Gondois@arm.com>
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Reviewed-by: Ionela Voinescu <ionela.voinescu@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'kernel/power')
| -rw-r--r-- | kernel/power/energy_model.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/power/energy_model.c b/kernel/power/energy_model.c index 0153b0ca7b23..6ecee99af842 100644 --- a/kernel/power/energy_model.c +++ b/kernel/power/energy_model.c @@ -384,6 +384,8 @@ int em_dev_register_perf_domain(struct device *dev, unsigned int nr_states, if (milliwatts) dev->em_pd->flags |= EM_PERF_DOMAIN_MILLIWATTS; + else if (cb->get_cost) + dev->em_pd->flags |= EM_PERF_DOMAIN_ARTIFICIAL; em_cpufreq_update_efficiencies(dev); |