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arm64: Set SD_ASYM_CPUCAPACITY sched_domain flag on DIE level

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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>
This commit is contained in:
Dietmar Eggemann 2016-11-30 20:36:31 +00:00 • committed by Amit Pundir
commit a0f6cfe1ec
1 changed files with 6 additions and 1 deletions
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7
arch/arm64/kernel/topology.c
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@ -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, },
};