[RFC v4 8/8] powerpc: Set turbo domain to NUMA node for task packing

[Parth Shah]

Provide an powerpc architecture specific implementation for
defining the turbo domain to make searching of the core to be bound within
the NUMA.  This provides a way to decrease the searching time for specific
architectures where we know the domain for the power budget.

Signed-off-by: Parth Shah <parth@xxxxxxxxxxxxx>
---
 arch/powerpc/include/asm/topology.h | 3 +++
 arch/powerpc/kernel/smp.c           | 5 +++++
 2 files changed, 8 insertions(+)

diff --git a/arch/powerpc/include/asm/topology.h b/arch/powerpc/include/asm/topology.h
index 1c777ee67180..410b94c9e1a2 100644
--- a/arch/powerpc/include/asm/topology.h
+++ b/arch/powerpc/include/asm/topology.h
@@ -133,10 +133,13 @@ static inline void shared_proc_topology_init(void) {}
 #define topology_core_cpumask(cpu)	(per_cpu(cpu_core_map, cpu))
 #define topology_core_id(cpu)		(cpu_to_core_id(cpu))
 #define arch_scale_core_capacity	powerpc_scale_core_capacity
+#define arch_turbo_domain		powerpc_turbo_domain
 
 unsigned long powerpc_scale_core_capacity(int first_smt,
 					  unsigned long smt_cap);
 
+struct cpumask *powerpc_turbo_domain(int cpu);
+
 int dlpar_cpu_readd(int cpu);
 #endif
 #endif
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index 149a3fbf8ed3..856f7233190e 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -1200,6 +1200,11 @@ unsigned long powerpc_scale_core_capacity(int first_cpu,
 	/* Scale core capacity based on smt mode */
 	return smt_mode == 1 ? cap : ((cap * smt_mode) >> 3) + cap;
 }
+
+inline struct cpumask *powerpc_turbo_domain(int cpu)
+{
+	return cpumask_of_node(cpu_to_node(cpu));
+}
 #endif
 
 static inline void add_cpu_to_smallcore_masks(int cpu)
-- 
2.17.1