From: Morten Rasmussen morten.rasmussen@arm.com
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 --- arch/arm/kernel/topology.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+)
diff --git a/arch/arm/kernel/topology.c b/arch/arm/kernel/topology.c index 7682e12..ec8ad5c 100644 --- a/arch/arm/kernel/topology.c +++ b/arch/arm/kernel/topology.c @@ -383,6 +383,28 @@ 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 */