x86: move cpu_coregroup_map to common file

it is equal between architectures

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 16 insertions, 0 deletions

diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index d774520a6b48..644e60969f90 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -1,6 +1,7 @@
 #include <linux/init.h>
 #include <linux/smp.h>
 #include <linux/module.h>
+#include <linux/sched.h>
 
 /* Number of siblings per CPU package */
 int smp_num_siblings = 1;
@@ -95,6 +96,21 @@ void __cpuinit set_cpu_sibling_map(int cpu)
         }
 }
 
+/* maps the cpu to the sched domain representing multi-core */
+cpumask_t cpu_coregroup_map(int cpu)
+{
+        struct cpuinfo_x86 *c = &cpu_data(cpu);
+        /*
+         * For perf, we return last level cache shared map.
+         * And for power savings, we return cpu_core_map
+         */
+        if (sched_mc_power_savings || sched_smt_power_savings)
+                return per_cpu(cpu_core_map, cpu);
+        else
+                return c->llc_shared_map;
+}
+
+
 #ifdef CONFIG_HOTPLUG_CPU
 void remove_siblinginfo(int cpu)
 {