acpi, memory-hotplug: extend movablemem_map ranges to the end of node
[platform/adaptation/renesas_rcar/renesas_kernel.git] / arch / x86 / mm / srat.c
1 /*
2  * ACPI 3.0 based NUMA setup
3  * Copyright 2004 Andi Kleen, SuSE Labs.
4  *
5  * Reads the ACPI SRAT table to figure out what memory belongs to which CPUs.
6  *
7  * Called from acpi_numa_init while reading the SRAT and SLIT tables.
8  * Assumes all memory regions belonging to a single proximity domain
9  * are in one chunk. Holes between them will be included in the node.
10  */
11
12 #include <linux/kernel.h>
13 #include <linux/acpi.h>
14 #include <linux/mmzone.h>
15 #include <linux/bitmap.h>
16 #include <linux/module.h>
17 #include <linux/topology.h>
18 #include <linux/bootmem.h>
19 #include <linux/memblock.h>
20 #include <linux/mm.h>
21 #include <asm/proto.h>
22 #include <asm/numa.h>
23 #include <asm/e820.h>
24 #include <asm/apic.h>
25 #include <asm/uv/uv.h>
26
27 int acpi_numa __initdata;
28
29 static __init int setup_node(int pxm)
30 {
31         return acpi_map_pxm_to_node(pxm);
32 }
33
34 static __init void bad_srat(void)
35 {
36         printk(KERN_ERR "SRAT: SRAT not used.\n");
37         acpi_numa = -1;
38 }
39
40 static __init inline int srat_disabled(void)
41 {
42         return acpi_numa < 0;
43 }
44
45 /* Callback for SLIT parsing */
46 void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
47 {
48         int i, j;
49
50         for (i = 0; i < slit->locality_count; i++)
51                 for (j = 0; j < slit->locality_count; j++)
52                         numa_set_distance(pxm_to_node(i), pxm_to_node(j),
53                                 slit->entry[slit->locality_count * i + j]);
54 }
55
56 /* Callback for Proximity Domain -> x2APIC mapping */
57 void __init
58 acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa)
59 {
60         int pxm, node;
61         int apic_id;
62
63         if (srat_disabled())
64                 return;
65         if (pa->header.length < sizeof(struct acpi_srat_x2apic_cpu_affinity)) {
66                 bad_srat();
67                 return;
68         }
69         if ((pa->flags & ACPI_SRAT_CPU_ENABLED) == 0)
70                 return;
71         pxm = pa->proximity_domain;
72         apic_id = pa->apic_id;
73         if (!apic->apic_id_valid(apic_id)) {
74                 printk(KERN_INFO "SRAT: PXM %u -> X2APIC 0x%04x ignored\n",
75                          pxm, apic_id);
76                 return;
77         }
78         node = setup_node(pxm);
79         if (node < 0) {
80                 printk(KERN_ERR "SRAT: Too many proximity domains %x\n", pxm);
81                 bad_srat();
82                 return;
83         }
84
85         if (apic_id >= MAX_LOCAL_APIC) {
86                 printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u skipped apicid that is too big\n", pxm, apic_id, node);
87                 return;
88         }
89         set_apicid_to_node(apic_id, node);
90         node_set(node, numa_nodes_parsed);
91         acpi_numa = 1;
92         printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u\n",
93                pxm, apic_id, node);
94 }
95
96 /* Callback for Proximity Domain -> LAPIC mapping */
97 void __init
98 acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
99 {
100         int pxm, node;
101         int apic_id;
102
103         if (srat_disabled())
104                 return;
105         if (pa->header.length != sizeof(struct acpi_srat_cpu_affinity)) {
106                 bad_srat();
107                 return;
108         }
109         if ((pa->flags & ACPI_SRAT_CPU_ENABLED) == 0)
110                 return;
111         pxm = pa->proximity_domain_lo;
112         if (acpi_srat_revision >= 2)
113                 pxm |= *((unsigned int*)pa->proximity_domain_hi) << 8;
114         node = setup_node(pxm);
115         if (node < 0) {
116                 printk(KERN_ERR "SRAT: Too many proximity domains %x\n", pxm);
117                 bad_srat();
118                 return;
119         }
120
121         if (get_uv_system_type() >= UV_X2APIC)
122                 apic_id = (pa->apic_id << 8) | pa->local_sapic_eid;
123         else
124                 apic_id = pa->apic_id;
125
126         if (apic_id >= MAX_LOCAL_APIC) {
127                 printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%02x -> Node %u skipped apicid that is too big\n", pxm, apic_id, node);
128                 return;
129         }
130
131         set_apicid_to_node(apic_id, node);
132         node_set(node, numa_nodes_parsed);
133         acpi_numa = 1;
134         printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%02x -> Node %u\n",
135                pxm, apic_id, node);
136 }
137
138 #ifdef CONFIG_MEMORY_HOTPLUG
139 static inline int save_add_info(void) {return 1;}
140 #else
141 static inline int save_add_info(void) {return 0;}
142 #endif
143
144 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
145 static void __init handle_movablemem(int node, u64 start, u64 end)
146 {
147         int overlap;
148         unsigned long start_pfn, end_pfn;
149
150         start_pfn = PFN_DOWN(start);
151         end_pfn = PFN_UP(end);
152
153         /*
154          * For movablecore_map=nn[KMG]@ss[KMG]:
155          *
156          * SRAT:                |_____| |_____| |_________| |_________| ......
157          * node id:                0       1         1           2
158          * user specified:                |__|                 |___|
159          * movablemem_map:                |___| |_________|    |______| ......
160          *
161          * Using movablemem_map, we can prevent memblock from allocating memory
162          * on ZONE_MOVABLE at boot time.
163          */
164         overlap = movablemem_map_overlap(start_pfn, end_pfn);
165         if (overlap >= 0) {
166                 /*
167                  * If part of this range is in movablemem_map, we need to
168                  * add the range after it to extend the range to the end
169                  * of the node, because from the min address specified to
170                  * the end of the node will be ZONE_MOVABLE.
171                  */
172                 start_pfn = max(start_pfn,
173                             movablemem_map.map[overlap].start_pfn);
174                 insert_movablemem_map(start_pfn, end_pfn);
175
176                 /*
177                  * Set the nodemask, so that if the address range on one node
178                  * is not continuse, we can add the subsequent ranges on the
179                  * same node into movablemem_map.
180                  */
181                 node_set(node, movablemem_map.numa_nodes_hotplug);
182         } else {
183                 if (node_isset(node, movablemem_map.numa_nodes_hotplug))
184                         /*
185                          * Insert the range if we already have movable ranges
186                          * on the same node.
187                          */
188                         insert_movablemem_map(start_pfn, end_pfn);
189         }
190 }
191 #else           /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
192 static inline void handle_movablemem(int node, u64 start, u64 end)
193 {
194 }
195 #endif          /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
196
197 /* Callback for parsing of the Proximity Domain <-> Memory Area mappings */
198 int __init
199 acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
200 {
201         u64 start, end;
202         u32 hotpluggable;
203         int node, pxm;
204
205         if (srat_disabled())
206                 goto out_err;
207         if (ma->header.length != sizeof(struct acpi_srat_mem_affinity))
208                 goto out_err_bad_srat;
209         if ((ma->flags & ACPI_SRAT_MEM_ENABLED) == 0)
210                 goto out_err;
211         hotpluggable = ma->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE;
212         if (hotpluggable && !save_add_info())
213                 goto out_err;
214
215         start = ma->base_address;
216         end = start + ma->length;
217         pxm = ma->proximity_domain;
218         if (acpi_srat_revision <= 1)
219                 pxm &= 0xff;
220
221         node = setup_node(pxm);
222         if (node < 0) {
223                 printk(KERN_ERR "SRAT: Too many proximity domains.\n");
224                 goto out_err_bad_srat;
225         }
226
227         if (numa_add_memblk(node, start, end) < 0)
228                 goto out_err_bad_srat;
229
230         node_set(node, numa_nodes_parsed);
231
232         printk(KERN_INFO "SRAT: Node %u PXM %u [mem %#010Lx-%#010Lx] %s\n",
233                node, pxm,
234                (unsigned long long) start, (unsigned long long) end - 1,
235                hotpluggable ? "Hot Pluggable": "");
236
237         handle_movablemem(node, start, end);
238
239         return 0;
240 out_err_bad_srat:
241         bad_srat();
242 out_err:
243         return -1;
244 }
245
246 void __init acpi_numa_arch_fixup(void) {}
247
248 int __init x86_acpi_numa_init(void)
249 {
250         int ret;
251
252         ret = acpi_numa_init();
253         if (ret < 0)
254                 return ret;
255         return srat_disabled() ? -EINVAL : 0;
256 }