1 files changed, 111 insertions, 28 deletions

diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index ba7a3055a9fc..2863a912bcd0 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -37,6 +37,7 @@ EXPORT_SYMBOL(node_data);
 
 static bootmem_data_t __initdata plat_node_bdata[MAX_NUMNODES];
 static int min_common_depth;
+static int n_mem_addr_cells, n_mem_size_cells;
 
 /*
  * We need somewhere to store start/end/node for each region until we have
@@ -254,32 +255,20 @@ static int __init find_min_common_depth(void)
         return depth;
 }
 
-static int __init get_mem_addr_cells(void)
+static void __init get_n_mem_cells(int *n_addr_cells, int *n_size_cells)
 {
         struct device_node *memory = NULL;
-        int rc;
 
         memory = of_find_node_by_type(memory, "memory");
         if (!memory)
-                return 0; /* it won't matter */
+                panic("numa.c: No memory nodes found!");
 
-        rc = prom_n_addr_cells(memory);
-        return rc;
+        *n_addr_cells = prom_n_addr_cells(memory);
+        *n_size_cells = prom_n_size_cells(memory);
+        of_node_put(memory);
 }
 
-static int __init get_mem_size_cells(void)
-{
-        struct device_node *memory = NULL;
-        int rc;
-
-        memory = of_find_node_by_type(memory, "memory");
-        if (!memory)
-                return 0; /* it won't matter */
-        rc = prom_n_size_cells(memory);
-        return rc;
-}
-
-static unsigned long __init read_n_cells(int n, unsigned int **buf)
+static unsigned long __devinit read_n_cells(int n, unsigned int **buf)
 {
         unsigned long result = 0;
 
@@ -386,7 +375,6 @@ static int __init parse_numa_properties(void)
 {
         struct device_node *cpu = NULL;
         struct device_node *memory = NULL;
-        int addr_cells, size_cells;
         int max_domain;
         unsigned long i;
 
@@ -425,8 +413,7 @@ static int __init parse_numa_properties(void)
                 }
         }
 
-        addr_cells = get_mem_addr_cells();
-        size_cells = get_mem_size_cells();
+        get_n_mem_cells(&n_mem_addr_cells, &n_mem_size_cells);
         memory = NULL;
         while ((memory = of_find_node_by_type(memory, "memory")) != NULL) {
                 unsigned long start;
@@ -436,15 +423,21 @@ static int __init parse_numa_properties(void)
                 unsigned int *memcell_buf;
                 unsigned int len;
 
-                memcell_buf = (unsigned int *)get_property(memory, "reg", &len);
+                memcell_buf = (unsigned int *)get_property(memory,
+                        "linux,usable-memory", &len);
+                if (!memcell_buf || len <= 0)
+                        memcell_buf =
+                                (unsigned int *)get_property(memory, "reg",
+                                        &len);
                 if (!memcell_buf || len <= 0)
                         continue;
 
-                ranges = memory->n_addrs;
+                /* ranges in cell */
+                ranges = (len >> 2) / (n_mem_addr_cells + n_mem_size_cells);
 new_range:
                 /* these are order-sensitive, and modify the buffer pointer */
-                start = read_n_cells(addr_cells, &memcell_buf);
-                size = read_n_cells(size_cells, &memcell_buf);
+                start = read_n_cells(n_mem_addr_cells, &memcell_buf);
+                size = read_n_cells(n_mem_size_cells, &memcell_buf);
 
                 numa_domain = of_node_numa_domain(memory);
 
@@ -497,7 +490,41 @@ static void __init setup_nonnuma(void)
         node_set_online(0);
 }
 
-static void __init dump_numa_topology(void)
+void __init dump_numa_cpu_topology(void)
+{
+        unsigned int node;
+        unsigned int cpu, count;
+
+        if (min_common_depth == -1 || !numa_enabled)
+                return;
+
+        for_each_online_node(node) {
+                printk(KERN_INFO "Node %d CPUs:", node);
+
+                count = 0;
+                /*
+                 * If we used a CPU iterator here we would miss printing
+                 * the holes in the cpumap.
+                 */
+                for (cpu = 0; cpu < NR_CPUS; cpu++) {
+                        if (cpu_isset(cpu, numa_cpumask_lookup_table[node])) {
+                                if (count == 0)
+                                        printk(" %u", cpu);
+                                ++count;
+                        } else {
+                                if (count > 1)
+                                        printk("-%u", cpu - 1);
+                                count = 0;
+                        }
+                }
+
+                if (count > 1)
+                        printk("-%u", NR_CPUS - 1);
+                printk("\n");
+        }
+}
+
+static void __init dump_numa_memory_topology(void)
 {
         unsigned int node;
         unsigned int count;
@@ -529,7 +556,6 @@ static void __init dump_numa_topology(void)
                         printk("-0x%lx", i);
                 printk("\n");
         }
-        return;
 }
 
 /*
@@ -591,7 +617,7 @@ void __init do_init_bootmem(void)
         if (parse_numa_properties())
                 setup_nonnuma();
         else
-                dump_numa_topology();
+                dump_numa_memory_topology();
 
         register_cpu_notifier(&ppc64_numa_nb);
 
@@ -730,3 +756,60 @@ static int __init early_numa(char *p)
         return 0;
 }
 early_param("numa", early_numa);
+
+#ifdef CONFIG_MEMORY_HOTPLUG
+/*
+ * Find the node associated with a hot added memory section.  Section
+ * corresponds to a SPARSEMEM section, not an LMB.  It is assumed that
+ * sections are fully contained within a single LMB.
+ */
+int hot_add_scn_to_nid(unsigned long scn_addr)
+{
+        struct device_node *memory = NULL;
+        nodemask_t nodes;
+        int numa_domain = 0;
+
+        if (!numa_enabled || (min_common_depth < 0))
+                return numa_domain;
+
+        while ((memory = of_find_node_by_type(memory, "memory")) != NULL) {
+                unsigned long start, size;
+                int ranges;
+                unsigned int *memcell_buf;
+                unsigned int len;
+
+                memcell_buf = (unsigned int *)get_property(memory, "reg", &len);
+                if (!memcell_buf || len <= 0)
+                        continue;
+
+                /* ranges in cell */
+                ranges = (len >> 2) / (n_mem_addr_cells + n_mem_size_cells);
+ha_new_range:
+                start = read_n_cells(n_mem_addr_cells, &memcell_buf);
+                size = read_n_cells(n_mem_size_cells, &memcell_buf);
+                numa_domain = of_node_numa_domain(memory);
+
+                /* Domains not present at boot default to 0 */
+                if (!node_online(numa_domain))
+                        numa_domain = any_online_node(NODE_MASK_ALL);
+
+                if ((scn_addr >= start) && (scn_addr < (start + size))) {
+                        of_node_put(memory);
+                        goto got_numa_domain;
+                }
+
+                if (--ranges)           /* process all ranges in cell */
+                        goto ha_new_range;
+        }
+        BUG();  /* section address should be found above */
+
+        /* Temporary code to ensure that returned node is not empty */
+got_numa_domain:
+        nodes_setall(nodes);
+        while (NODE_DATA(numa_domain)->node_spanned_pages == 0) {
+                node_clear(numa_domain, nodes);
+                numa_domain = any_online_node(nodes);
+        }
+        return numa_domain;
+}
+#endif /* CONFIG_MEMORY_HOTPLUG */