arm64: Set SD_ASYM_CPUCAPACITY sched_domain flag on DIE level

Enable Capacity-Aware_scheduling.

This is a shortcut from the EAS integration implementation. We know
there are SoCs in use which have asymmetric cpu capacities on DIE level.

Change-Id: I7f1326e86b8fc08b65d1c1341da7d1ef1013dcbc
Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
(cherry picked from commit 82f95a8cdff67770f02b7e4f5b1c084f42afc0e2)
Signed-off-by: Chris Redpath <chris.redpath@arm.com>

diff --git a/arch/arm64/kernel/topology.c b/arch/arm64/kernel/topology.c
index 5b2c67a510d8a5ecbed84300b6118248432a3cc2..7758f7ff131b307523be233ebc4cc343559e0e90 100644 (file)
--- a/arch/arm64/kernel/topology.c
+++ b/arch/arm64/kernel/topology.c
@@ -258,6 +258,11 @@ const struct cpumask *cpu_coregroup_mask(int cpu)
        return &cpu_topology[cpu].core_sibling;
 }
 
+static int cpu_cpu_flags(void)
+{
+       return SD_ASYM_CPUCAPACITY;
+}
+
 static inline int cpu_corepower_flags(void)
 {
        return SD_SHARE_PKG_RESOURCES  | SD_SHARE_POWERDOMAIN | \
@@ -268,7 +273,7 @@ static struct sched_domain_topology_level arm64_topology[] = {
 #ifdef CONFIG_SCHED_MC
        { cpu_coregroup_mask, cpu_corepower_flags, cpu_core_energy, SD_INIT_NAME(MC) },
 #endif
-       { cpu_cpu_mask, NULL, cpu_cluster_energy, SD_INIT_NAME(DIE) },
+       { cpu_cpu_mask, cpu_cpu_flags, cpu_cluster_energy, SD_INIT_NAME(DIE) },
        { NULL, },
 };