3 files changed, 43 insertions, 0 deletions

diff --git a/arch/sh/include/asm/topology.h b/arch/sh/include/asm/topology.h
index 65e7bd2f2240..37cdadd975ac 100644
--- a/arch/sh/include/asm/topology.h
+++ b/arch/sh/include/asm/topology.h
@@ -40,6 +40,14 @@
 
 #endif
 
+#define mc_capable()    (1)
+
+const struct cpumask *cpu_coregroup_mask(unsigned int cpu);
+
+extern cpumask_t cpu_core_map[NR_CPUS];
+
+#define topology_core_cpumask(cpu)      (&cpu_core_map[cpu])
+
 #include <asm-generic/topology.h>
 
 #endif /* _ASM_SH_TOPOLOGY_H */
diff --git a/arch/sh/kernel/topology.c b/arch/sh/kernel/topology.c
index 0838942b7083..9b0b633b6c92 100644
--- a/arch/sh/kernel/topology.c
+++ b/arch/sh/kernel/topology.c
@@ -16,6 +16,32 @@
 
 static DEFINE_PER_CPU(struct cpu, cpu_devices);
 
+cpumask_t cpu_core_map[NR_CPUS];
+
+static cpumask_t cpu_coregroup_map(unsigned int cpu)
+{
+        /*
+         * Presently all SH-X3 SMP cores are multi-cores, so just keep it
+         * simple until we have a method for determining topology..
+         */
+        return cpu_possible_map;
+}
+
+const struct cpumask *cpu_coregroup_mask(unsigned int cpu)
+{
+        return &cpu_core_map[cpu];
+}
+
+int arch_update_cpu_topology(void)
+{
+        unsigned int cpu;
+
+        for_each_possible_cpu(cpu)
+                cpu_core_map[cpu] = cpu_coregroup_map(cpu);
+
+        return 0;
+}
+
 static int __init topology_init(void)
 {
         int i, ret;
diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig
index b8a9032c74be..ca02b72bf46f 100644
--- a/arch/sh/mm/Kconfig
+++ b/arch/sh/mm/Kconfig
@@ -256,6 +256,15 @@ endchoice
 
 source "mm/Kconfig"
 
+config SCHED_MC
+        bool "Multi-core scheduler support"
+        depends on SMP
+        default y
+        help
+          Multi-core scheduler support improves the CPU scheduler's decision
+          making when dealing with multi-core CPU chips at a cost of slightly
+          increased overhead in some places. If unsure say N here.
+
 endmenu
 
 menu "Cache configuration"