x86-64, NUMA: Use common {cpu|mem}_nodes_parsed

ACPI and amd are using separate nodes_parsed masks.  Add
{cpu|mem}_nodes_parsed and use them in all NUMA init methods.
Initialization of the masks and building node_possible_map are now
handled commonly by initmem_init().

dummy_numa_init() is updated to set node 0 on both masks.  While at
it, move the info messages from scan to init.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>

3 files changed, 28 insertions, 24 deletions

diff --git a/arch/x86/mm/amdtopology_64.c b/arch/x86/mm/amdtopology_64.c
index 655ccffc6ee5..4f822a247125 100644
--- a/arch/x86/mm/amdtopology_64.c
+++ b/arch/x86/mm/amdtopology_64.c
@@ -28,7 +28,6 @@
 
 static struct bootnode __initdata nodes[8];
 static unsigned char __initdata nodeids[8];
-static nodemask_t __initdata nodes_parsed = NODE_MASK_NONE;
 
 static __init int find_northbridge(void)
 {
@@ -123,7 +122,7 @@ int __init amd_numa_init(void)
                                nodeid, (base >> 8) & 3, (limit >> 8) & 3);
                         return -EINVAL;
                 }
-                if (node_isset(nodeid, nodes_parsed)) {
+                if (node_isset(nodeid, mem_nodes_parsed)) {
                         pr_info("Node %d already present, skipping\n",
                                 nodeid);
                         continue;
@@ -173,7 +172,8 @@ int __init amd_numa_init(void)
 
                 prevbase = base;
 
-                node_set(nodeid, nodes_parsed);
+                node_set(nodeid, mem_nodes_parsed);
+                node_set(nodeid, cpu_nodes_parsed);
         }
 
         if (!found)
@@ -190,7 +190,7 @@ void __init amd_get_nodes(struct bootnode *physnodes)
 {
         int i;
 
-        for_each_node_mask(i, nodes_parsed) {
+        for_each_node_mask(i, mem_nodes_parsed) {
                 physnodes[i].start = nodes[i].start;
                 physnodes[i].end = nodes[i].end;
         }
@@ -258,8 +258,6 @@ int __init amd_scan_nodes(void)
         unsigned int apicid_base;
         int i;
 
-        BUG_ON(nodes_empty(nodes_parsed));
-        node_possible_map = nodes_parsed;
         memnode_shift = compute_hash_shift(nodes, 8, NULL);
         if (memnode_shift < 0) {
                 pr_err("No NUMA node hash function found. Contact maintainer\n");
diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c
index c984e3431cc7..4404e1d649ac 100644
--- a/arch/x86/mm/numa_64.c
+++ b/arch/x86/mm/numa_64.c
@@ -25,6 +25,9 @@
 struct pglist_data *node_data[MAX_NUMNODES] __read_mostly;
 EXPORT_SYMBOL(node_data);
 
+nodemask_t cpu_nodes_parsed __initdata;
+nodemask_t mem_nodes_parsed __initdata;
+
 struct memnode memnode;
 
 static unsigned long __initdata nodemap_addr;
@@ -582,22 +585,23 @@ static int __init numa_emulation(unsigned long start_pfn,
 
 static int dummy_numa_init(void)
 {
-        return 0;
-}
-
-static int dummy_scan_nodes(void)
-{
         printk(KERN_INFO "%s\n",
                numa_off ? "NUMA turned off" : "No NUMA configuration found");
         printk(KERN_INFO "Faking a node at %016lx-%016lx\n",
                0LU, max_pfn << PAGE_SHIFT);
 
+        node_set(0, cpu_nodes_parsed);
+        node_set(0, mem_nodes_parsed);
+
+        return 0;
+}
+
+static int dummy_scan_nodes(void)
+{
         /* setup dummy node covering all memory */
         memnode_shift = 63;
         memnodemap = memnode.embedded_map;
         memnodemap[0] = 0;
-        node_set_online(0);
-        node_set(0, node_possible_map);
         memblock_x86_register_active_regions(0, 0, max_pfn);
         init_memory_mapping_high();
         setup_node_bootmem(0, 0, max_pfn << PAGE_SHIFT);
@@ -630,6 +634,8 @@ void __init initmem_init(void)
                 for (j = 0; j < MAX_LOCAL_APIC; j++)
                         set_apicid_to_node(j, NUMA_NO_NODE);
 
+                nodes_clear(cpu_nodes_parsed);
+                nodes_clear(mem_nodes_parsed);
                 nodes_clear(node_possible_map);
                 nodes_clear(node_online_map);
 
@@ -643,6 +649,11 @@ void __init initmem_init(void)
                 nodes_clear(node_possible_map);
                 nodes_clear(node_online_map);
 #endif
+                /* Account for nodes with cpus and no memory */
+                nodes_or(node_possible_map, mem_nodes_parsed, cpu_nodes_parsed);
+                if (WARN_ON(nodes_empty(node_possible_map)))
+                        continue;
+
                 if (!scan_nodes[i]())
                         return;
         }
diff --git a/arch/x86/mm/srat_64.c b/arch/x86/mm/srat_64.c
index 597e011cfb51..33e72ec4fa4c 100644
--- a/arch/x86/mm/srat_64.c
+++ b/arch/x86/mm/srat_64.c
@@ -28,8 +28,6 @@ int acpi_numa __initdata;
 
 static struct acpi_table_slit *acpi_slit;
 
-static nodemask_t nodes_parsed __initdata;
-static nodemask_t cpu_nodes_parsed __initdata;
 static struct bootnode nodes[MAX_NUMNODES] __initdata;
 static struct bootnode nodes_add[MAX_NUMNODES];
 
@@ -293,7 +291,7 @@ acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
 
         if (!(ma->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE)) {
                 nd = &nodes[node];
-                if (!node_test_and_set(node, nodes_parsed)) {
+                if (!node_test_and_set(node, mem_nodes_parsed)) {
                         nd->start = start;
                         nd->end = end;
                 } else {
@@ -319,7 +317,7 @@ static int __init nodes_cover_memory(const struct bootnode *nodes)
         unsigned long pxmram, e820ram;
 
         pxmram = 0;
-        for_each_node_mask(i, nodes_parsed) {
+        for_each_node_mask(i, mem_nodes_parsed) {
                 unsigned long s = nodes[i].start >> PAGE_SHIFT;
                 unsigned long e = nodes[i].end >> PAGE_SHIFT;
                 pxmram += e - s;
@@ -348,7 +346,7 @@ void __init acpi_get_nodes(struct bootnode *physnodes, unsigned long start,
 {
         int i;
 
-        for_each_node_mask(i, nodes_parsed) {
+        for_each_node_mask(i, mem_nodes_parsed) {
                 cutoff_node(i, start, end);
                 physnodes[i].start = nodes[i].start;
                 physnodes[i].end = nodes[i].end;
@@ -449,9 +447,6 @@ int __init acpi_scan_nodes(void)
 
         init_memory_mapping_high();
 
-        /* Account for nodes with cpus and no memory */
-        nodes_or(node_possible_map, nodes_parsed, cpu_nodes_parsed);
-
         /* Finally register nodes */
         for_each_node_mask(i, node_possible_map)
                 setup_node_bootmem(i, nodes[i].start, nodes[i].end);
@@ -485,7 +480,7 @@ static int __init find_node_by_addr(unsigned long addr)
         int ret = NUMA_NO_NODE;
         int i;
 
-        for_each_node_mask(i, nodes_parsed) {
+        for_each_node_mask(i, mem_nodes_parsed) {
                 /*
                  * Find the real node that this emulated node appears on.  For
                  * the sake of simplicity, we only use a real node's starting
@@ -545,10 +540,10 @@ void __init acpi_fake_nodes(const struct bootnode *fake_nodes, int num_nodes)
                 __acpi_map_pxm_to_node(fake_node_to_pxm_map[i], i);
         memcpy(__apicid_to_node, fake_apicid_to_node, sizeof(__apicid_to_node));
 
-        nodes_clear(nodes_parsed);
+        nodes_clear(mem_nodes_parsed);
         for (i = 0; i < num_nodes; i++)
                 if (fake_nodes[i].start != fake_nodes[i].end)
-                        node_set(i, nodes_parsed);
+                        node_set(i, mem_nodes_parsed);
 }
 
 static int null_slit_node_compare(int a, int b)