ARM: sched: Setup SCHED_HMP domains

SCHED_HMP requires the different cpu types to be represented by an
ordered list of hmp_domains. Each hmp_domain represents all cpus of
a particular type using a cpumask.

The list is platform specific and therefore must be generated by
platform code by implementing arch_get_hmp_domains().

Signed-off-by: Morten Rasmussen <Morten.Rasmussen@arm.com>

diff --git a/arch/arm/kernel/topology.c b/arch/arm/kernel/topology.c
index e6e430a567c08516d09638127c432ebc2a2c4b50..627e14e44af5cf314c52467eab8c27eaf3067d03 100644 (file)
--- a/arch/arm/kernel/topology.c
+++ b/arch/arm/kernel/topology.c
@@ -355,6 +355,28 @@ void __init arch_get_fast_and_slow_cpus(struct cpumask *fast,
        cpumask_clear(slow);
 }
 
+void __init arch_get_hmp_domains(struct list_head *hmp_domains_list)
+{
+       struct cpumask hmp_fast_cpu_mask;
+       struct cpumask hmp_slow_cpu_mask;
+       struct hmp_domain *domain;
+
+       arch_get_fast_and_slow_cpus(&hmp_fast_cpu_mask, &hmp_slow_cpu_mask);
+
+       /*
+        * Initialize hmp_domains
+        * Must be ordered with respect to compute capacity.
+        * Fastest domain at head of list.
+        */
+       domain = (struct hmp_domain *)
+               kmalloc(sizeof(struct hmp_domain), GFP_KERNEL);
+       cpumask_copy(&domain->cpus, &hmp_slow_cpu_mask);
+       list_add(&domain->hmp_domains, hmp_domains_list);
+       domain = (struct hmp_domain *)
+               kmalloc(sizeof(struct hmp_domain), GFP_KERNEL);
+       cpumask_copy(&domain->cpus, &hmp_fast_cpu_mask);
+       list_add(&domain->hmp_domains, hmp_domains_list);
+}
 #endif /* CONFIG_SCHED_HMP */