Merge "ARM: dts: msm: disable core_ctl for SDM630"

1 files changed, 45 insertions, 0 deletions

diff --git a/kernel/sched/core_ctl.c b/kernel/sched/core_ctl.c
index 983159cc0646..1dde338d30f2 100644
--- a/kernel/sched/core_ctl.c
+++ b/kernel/sched/core_ctl.c
@@ -653,6 +653,9 @@ int core_ctl_set_boost(bool boost)
 	int ret = 0;
 	bool boost_state_changed = false;
 
+	if (unlikely(!initialized))
+		return 0;
+
 	spin_lock_irqsave(&state_lock, flags);
 	for_each_cluster(cluster, index) {
 		if (cluster->is_big_cluster) {
@@ -931,6 +934,42 @@ static struct notifier_block __refdata cpu_notifier = {
 
 /* ============================ init code ============================== */
 
+static cpumask_var_t core_ctl_disable_cpumask;
+static bool core_ctl_disable_cpumask_present;
+
+static int __init core_ctl_disable_setup(char *str)
+{
+	if (!*str)
+		return -EINVAL;
+
+	alloc_bootmem_cpumask_var(&core_ctl_disable_cpumask);
+
+	if (cpulist_parse(str, core_ctl_disable_cpumask) < 0) {
+		free_bootmem_cpumask_var(core_ctl_disable_cpumask);
+		return -EINVAL;
+	}
+
+	core_ctl_disable_cpumask_present = true;
+	pr_info("disable_cpumask=%*pbl\n",
+			cpumask_pr_args(core_ctl_disable_cpumask));
+
+	return 0;
+}
+early_param("core_ctl_disable_cpumask", core_ctl_disable_setup);
+
+static bool should_skip(const struct cpumask *mask)
+{
+	if (!core_ctl_disable_cpumask_present)
+		return false;
+
+	/*
+	 * We operate on a cluster basis. Disable the core_ctl for
+	 * a cluster, if all of it's cpus are specified in
+	 * core_ctl_disable_cpumask
+	 */
+	return cpumask_subset(mask, core_ctl_disable_cpumask);
+}
+
 static struct cluster_data *find_cluster_by_first_cpu(unsigned int first_cpu)
 {
 	unsigned int i;
@@ -952,6 +991,9 @@ static int cluster_init(const struct cpumask *mask)
 	unsigned int cpu;
 	struct sched_param param = { .sched_priority = MAX_RT_PRIO-1 };
 
+	if (should_skip(mask))
+		return 0;
+
 	if (find_cluster_by_first_cpu(first_cpu))
 		return 0;
 
@@ -1052,6 +1094,9 @@ static int __init core_ctl_init(void)
 {
 	unsigned int cpu;
 
+	if (should_skip(cpu_possible_mask))
+		return 0;
+
 	core_ctl_check_interval = (rq_avg_period_ms - RQ_AVG_TOLERANCE)
 					* NSEC_PER_MSEC;