Attach an Energy Model perf_domain to each sugov_policy to prepare the
ground for energy-aware schedutil.
Signed-off-by: Douglas RAILLARD <douglas.raill...@arm.com>
---
kernel/sched/cpufreq_schedutil.c | 39 ++++++++++++++++++++++++++++++++
1 file changed, 39 insertions(+)
diff --git a/kernel/sched/cpufreq_schedutil.c b/kernel/sched/cpufreq_schedutil.c
index ba9e8309eec7..9abda58827c0 100644
--- a/kernel/sched/cpufreq_schedutil.c
+++ b/kernel/sched/cpufreq_schedutil.c
@@ -42,6 +42,10 @@ struct sugov_policy {
bool limits_changed;
bool need_freq_update;
+
+#ifdef CONFIG_ENERGY_MODEL
+ struct em_perf_domain *pd;
+#endif
};
struct sugov_cpu {
@@ -66,6 +70,38 @@ static DEFINE_PER_CPU(struct sugov_cpu, sugov_cpu);
/************************ Governor internals ***********************/
+#ifdef CONFIG_ENERGY_MODEL
+static void sugov_policy_attach_pd(struct sugov_policy *sg_policy)
+{
+ struct em_perf_domain *pd;
+ struct cpufreq_policy *policy = sg_policy->policy;
+
+ sg_policy->pd = NULL;
+ pd = em_cpu_get(policy->cpu);
+ if (!pd)
+ return;
+
+ if (cpumask_equal(policy->related_cpus, to_cpumask(pd->cpus)))
+ sg_policy->pd = pd;
+ else
+ pr_warn("%s: Not all CPUs in schedutil policy %u share the same
perf domain, no perf domain for that policy will be registered\n",
+ __func__, policy->cpu);
+}
+
+static struct em_perf_domain *sugov_policy_get_pd(
+ struct sugov_policy *sg_policy)
+{
+ return sg_policy->pd;
+}
+#else /* CONFIG_ENERGY_MODEL */
+static void sugov_policy_attach_pd(struct sugov_policy *sg_policy) {}
+static struct em_perf_domain *sugov_policy_get_pd(
+ struct sugov_policy *sg_policy)
+{
+ return NULL;
+}
+#endif /* CONFIG_ENERGY_MODEL */
+
static bool sugov_should_update_freq(struct sugov_policy *sg_policy, u64 time)
{
s64 delta_ns;
@@ -859,6 +895,9 @@ static int sugov_start(struct cpufreq_policy *policy)
sugov_update_shared :
sugov_update_single);
}
+
+ sugov_policy_attach_pd(sg_policy);
+
return 0;
}
--
2.23.0
