acpi, memory-hotplug: extend movablemem_map ranges to the end of node

[platform/adaptation/renesas_rcar/renesas_kernel.git] / arch / x86 / mm / srat.c

diff --git a/arch/x86/mm/srat.c b/arch/x86/mm/srat.c
index cdd0da9..3e90039 100644 (file)
--- a/arch/x86/mm/srat.c
+++ b/arch/x86/mm/srat.c
@@ -141,11 +141,65 @@ static inline int save_add_info(void) {return 1;}
 static inline int save_add_info(void) {return 0;}
 #endif
 
+#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
+static void __init handle_movablemem(int node, u64 start, u64 end)
+{
+       int overlap;
+       unsigned long start_pfn, end_pfn;
+
+       start_pfn = PFN_DOWN(start);
+       end_pfn = PFN_UP(end);
+
+       /*
+        * For movablecore_map=nn[KMG]@ss[KMG]:
+        *
+        * SRAT:                |_____| |_____| |_________| |_________| ......
+        * node id:                0       1         1           2
+        * user specified:                |__|                 |___|
+        * movablemem_map:                |___| |_________|    |______| ......
+        *
+        * Using movablemem_map, we can prevent memblock from allocating memory
+        * on ZONE_MOVABLE at boot time.
+        */
+       overlap = movablemem_map_overlap(start_pfn, end_pfn);
+       if (overlap >= 0) {
+               /*
+                * If part of this range is in movablemem_map, we need to
+                * add the range after it to extend the range to the end
+                * of the node, because from the min address specified to
+                * the end of the node will be ZONE_MOVABLE.
+                */
+               start_pfn = max(start_pfn,
+                           movablemem_map.map[overlap].start_pfn);
+               insert_movablemem_map(start_pfn, end_pfn);
+
+               /*
+                * Set the nodemask, so that if the address range on one node
+                * is not continuse, we can add the subsequent ranges on the
+                * same node into movablemem_map.
+                */
+               node_set(node, movablemem_map.numa_nodes_hotplug);
+       } else {
+               if (node_isset(node, movablemem_map.numa_nodes_hotplug))
+                       /*
+                        * Insert the range if we already have movable ranges
+                        * on the same node.
+                        */
+                       insert_movablemem_map(start_pfn, end_pfn);
+       }
+}
+#else          /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
+static inline void handle_movablemem(int node, u64 start, u64 end)
+{
+}
+#endif         /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
+
 /* Callback for parsing of the Proximity Domain <-> Memory Area mappings */
 int __init
 acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
 {
        u64 start, end;
+       u32 hotpluggable;
        int node, pxm;
 
        if (srat_disabled())
@@ -154,7 +208,8 @@ acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
                goto out_err_bad_srat;
        if ((ma->flags & ACPI_SRAT_MEM_ENABLED) == 0)
                goto out_err;
-       if ((ma->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE) && !save_add_info())
+       hotpluggable = ma->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE;
+       if (hotpluggable && !save_add_info())
                goto out_err;
 
        start = ma->base_address;
@@ -174,9 +229,12 @@ acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
 
        node_set(node, numa_nodes_parsed);
 
-       printk(KERN_INFO "SRAT: Node %u PXM %u [mem %#010Lx-%#010Lx]\n",
+       printk(KERN_INFO "SRAT: Node %u PXM %u [mem %#010Lx-%#010Lx] %s\n",
               node, pxm,
-              (unsigned long long) start, (unsigned long long) end - 1);
+              (unsigned long long) start, (unsigned long long) end - 1,
+              hotpluggable ? "Hot Pluggable": "");
+
+       handle_movablemem(node, start, end);
 
        return 0;
 out_err_bad_srat: