From: Morten Rasmussen <Morten.Rasmussen@arm.com>
Date: Fri, 14 Sep 2012 13:38:14 +0000 (+0100)
Subject: ARM: sched: Setup SCHED_HMP domains
X-Git-Tag: firefly_0821_release~3680^2~16^2^2~73
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=1baaccf456ece33b8fa02f8cdf3977d6a95b393c;p=firefly-linux-kernel-4.4.55.git

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 e6e430a567c0..627e14e44af5 100644
--- 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 */