[SPARC64]: Proper multi-core scheduling support.

The scheduling domain hierarchy is:

   all cpus -->
      cpus that share an instruction cache -->
          cpus that share an integer execution unit

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 49 insertions, 0 deletions

diff --git a/arch/sparc64/kernel/mdesc.c b/arch/sparc64/kernel/mdesc.c
index 9246c2cf9574..1b5db4bc6b34 100644
--- a/arch/sparc64/kernel/mdesc.c
+++ b/arch/sparc64/kernel/mdesc.c
@@ -473,6 +473,53 @@ static void __init set_core_ids(void)
         }
 }
 
+static void __init mark_proc_ids(struct mdesc_node *mp, int proc_id)
+{
+        int i;
+
+        for (i = 0; i < mp->num_arcs; i++) {
+                struct mdesc_node *t = mp->arcs[i].arc;
+                const u64 *id;
+
+                if (strcmp(mp->arcs[i].name, "back"))
+                        continue;
+
+                if (strcmp(t->name, "cpu"))
+                        continue;
+
+                id = md_get_property(t, "id", NULL);
+                if (*id < NR_CPUS)
+                        cpu_data(*id).proc_id = proc_id;
+        }
+}
+
+static void __init __set_proc_ids(const char *exec_unit_name)
+{
+        struct mdesc_node *mp;
+        int idx;
+
+        idx = 0;
+        md_for_each_node_by_name(mp, exec_unit_name) {
+                const char *type;
+                int len;
+
+                type = md_get_property(mp, "type", &len);
+                if (!find_in_proplist(type, "int", len) &&
+                    !find_in_proplist(type, "integer", len))
+                        continue;
+
+                mark_proc_ids(mp, idx);
+
+                idx++;
+        }
+}
+
+static void __init set_proc_ids(void)
+{
+        __set_proc_ids("exec_unit");
+        __set_proc_ids("exec-unit");
+}
+
 static void __init get_one_mondo_bits(const u64 *p, unsigned int *mask, unsigned char def)
 {
         u64 val;
@@ -574,9 +621,11 @@ static void __init mdesc_fill_in_cpu_data(void)
 #endif
 
                 c->core_id = 0;
+                c->proc_id = -1;
         }
 
         set_core_ids();
+        set_proc_ids();
 
         smp_fill_in_sib_core_maps();
 }