linux-kernel - [RFC PATCH 07/10] ARM: sched: Setup SCHED

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Date:	Fri, 21 Sep 2012 19:32:22 +0100
From:	morten.rasmussen@....com
To:	paulmck@...ux.vnet.ibm.com, pjt@...gle.com, peterz@...radead.org,
	suresh.b.siddha@...el.com
Cc:	morten.rasmussen@....com, linaro-sched-sig@...ts.linaro.org,
	linaro-dev@...ts.linaro.org, linux-kernel@...r.kernel.org
Subject: [RFC PATCH 07/10] ARM: sched: Setup SCHED_HMP domains

From: Morten Rasmussen <morten.rasmussen@....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@....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 */
 
 
-- 
1.7.9.5


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