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1/*
2 * acpi_numa.c - ACPI NUMA support
3 *
4 * Copyright (C) 2002 Takayoshi Kochi <t-kochi@bq.jp.nec.com>
5 *
6 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
23 *
24 */
25#include <linux/module.h>
26#include <linux/init.h>
27#include <linux/kernel.h>
28#include <linux/types.h>
29#include <linux/errno.h>
30#include <linux/acpi.h>
31#include <linux/numa.h>
32#include <acpi/acpi_bus.h>
33
34#define PREFIX "ACPI: "
35
36#define ACPI_NUMA 0x80000000
37#define _COMPONENT ACPI_NUMA
38ACPI_MODULE_NAME("numa");
39
40static nodemask_t nodes_found_map = NODE_MASK_NONE;
41
42/* maps to convert between proximity domain and logical node ID */
43static int pxm_to_node_map[MAX_PXM_DOMAINS]
44 = { [0 ... MAX_PXM_DOMAINS - 1] = NUMA_NO_NODE };
45static int node_to_pxm_map[MAX_NUMNODES]
46 = { [0 ... MAX_NUMNODES - 1] = PXM_INVAL };
47
48unsigned char acpi_srat_revision __initdata;
49
50int pxm_to_node(int pxm)
51{
52 if (pxm < 0)
53 return NUMA_NO_NODE;
54 return pxm_to_node_map[pxm];
55}
56
57int node_to_pxm(int node)
58{
59 if (node < 0)
60 return PXM_INVAL;
61 return node_to_pxm_map[node];
62}
63
64void __acpi_map_pxm_to_node(int pxm, int node)
65{
66 if (pxm_to_node_map[pxm] == NUMA_NO_NODE || node < pxm_to_node_map[pxm])
67 pxm_to_node_map[pxm] = node;
68 if (node_to_pxm_map[node] == PXM_INVAL || pxm < node_to_pxm_map[node])
69 node_to_pxm_map[node] = pxm;
70}
71
72int acpi_map_pxm_to_node(int pxm)
73{
74 int node = pxm_to_node_map[pxm];
75
76 if (node < 0) {
77 if (nodes_weight(nodes_found_map) >= MAX_NUMNODES)
78 return NUMA_NO_NODE;
79 node = first_unset_node(nodes_found_map);
80 __acpi_map_pxm_to_node(pxm, node);
81 node_set(node, nodes_found_map);
82 }
83
84 return node;
85}
86
87static void __init
88acpi_table_print_srat_entry(struct acpi_subtable_header *header)
89{
90
91 ACPI_FUNCTION_NAME("acpi_table_print_srat_entry");
92
93 if (!header)
94 return;
95
96 switch (header->type) {
97
98 case ACPI_SRAT_TYPE_CPU_AFFINITY:
99#ifdef ACPI_DEBUG_OUTPUT
100 {
101 struct acpi_srat_cpu_affinity *p =
102 (struct acpi_srat_cpu_affinity *)header;
103 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
104 "SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n",
105 p->apic_id, p->local_sapic_eid,
106 p->proximity_domain_lo,
107 (p->flags & ACPI_SRAT_CPU_ENABLED)?
108 "enabled" : "disabled"));
109 }
110#endif /* ACPI_DEBUG_OUTPUT */
111 break;
112
113 case ACPI_SRAT_TYPE_MEMORY_AFFINITY:
114#ifdef ACPI_DEBUG_OUTPUT
115 {
116 struct acpi_srat_mem_affinity *p =
117 (struct acpi_srat_mem_affinity *)header;
118 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
119 "SRAT Memory (0x%lx length 0x%lx) in proximity domain %d %s%s\n",
120 (unsigned long)p->base_address,
121 (unsigned long)p->length,
122 p->proximity_domain,
123 (p->flags & ACPI_SRAT_MEM_ENABLED)?
124 "enabled" : "disabled",
125 (p->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE)?
126 " hot-pluggable" : ""));
127 }
128#endif /* ACPI_DEBUG_OUTPUT */
129 break;
130
131 case ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY:
132#ifdef ACPI_DEBUG_OUTPUT
133 {
134 struct acpi_srat_x2apic_cpu_affinity *p =
135 (struct acpi_srat_x2apic_cpu_affinity *)header;
136 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
137 "SRAT Processor (x2apicid[0x%08x]) in"
138 " proximity domain %d %s\n",
139 p->apic_id,
140 p->proximity_domain,
141 (p->flags & ACPI_SRAT_CPU_ENABLED) ?
142 "enabled" : "disabled"));
143 }
144#endif /* ACPI_DEBUG_OUTPUT */
145 break;
146 default:
147 printk(KERN_WARNING PREFIX
148 "Found unsupported SRAT entry (type = 0x%x)\n",
149 header->type);
150 break;
151 }
152}
153
154/*
155 * A lot of BIOS fill in 10 (= no distance) everywhere. This messes
156 * up the NUMA heuristics which wants the local node to have a smaller
157 * distance than the others.
158 * Do some quick checks here and only use the SLIT if it passes.
159 */
160static __init int slit_valid(struct acpi_table_slit *slit)
161{
162 int i, j;
163 int d = slit->locality_count;
164 for (i = 0; i < d; i++) {
165 for (j = 0; j < d; j++) {
166 u8 val = slit->entry[d*i + j];
167 if (i == j) {
168 if (val != LOCAL_DISTANCE)
169 return 0;
170 } else if (val <= LOCAL_DISTANCE)
171 return 0;
172 }
173 }
174 return 1;
175}
176
177static int __init acpi_parse_slit(struct acpi_table_header *table)
178{
179 struct acpi_table_slit *slit;
180
181 if (!table)
182 return -EINVAL;
183
184 slit = (struct acpi_table_slit *)table;
185
186 if (!slit_valid(slit)) {
187 printk(KERN_INFO "ACPI: SLIT table looks invalid. Not used.\n");
188 return -EINVAL;
189 }
190 acpi_numa_slit_init(slit);
191
192 return 0;
193}
194
195void __init __attribute__ ((weak))
196acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa)
197{
198 printk(KERN_WARNING PREFIX
199 "Found unsupported x2apic [0x%08x] SRAT entry\n", pa->apic_id);
200 return;
201}
202
203
204static int __init
205acpi_parse_x2apic_affinity(struct acpi_subtable_header *header,
206 const unsigned long end)
207{
208 struct acpi_srat_x2apic_cpu_affinity *processor_affinity;
209
210 processor_affinity = (struct acpi_srat_x2apic_cpu_affinity *)header;
211 if (!processor_affinity)
212 return -EINVAL;
213
214 acpi_table_print_srat_entry(header);
215
216 /* let architecture-dependent part to do it */
217 acpi_numa_x2apic_affinity_init(processor_affinity);
218
219 return 0;
220}
221
222static int __init
223acpi_parse_processor_affinity(struct acpi_subtable_header *header,
224 const unsigned long end)
225{
226 struct acpi_srat_cpu_affinity *processor_affinity;
227
228 processor_affinity = (struct acpi_srat_cpu_affinity *)header;
229 if (!processor_affinity)
230 return -EINVAL;
231
232 acpi_table_print_srat_entry(header);
233
234 /* let architecture-dependent part to do it */
235 acpi_numa_processor_affinity_init(processor_affinity);
236
237 return 0;
238}
239
240static int __init
241acpi_parse_memory_affinity(struct acpi_subtable_header * header,
242 const unsigned long end)
243{
244 struct acpi_srat_mem_affinity *memory_affinity;
245
246 memory_affinity = (struct acpi_srat_mem_affinity *)header;
247 if (!memory_affinity)
248 return -EINVAL;
249
250 acpi_table_print_srat_entry(header);
251
252 /* let architecture-dependent part to do it */
253 acpi_numa_memory_affinity_init(memory_affinity);
254
255 return 0;
256}
257
258static int __init acpi_parse_srat(struct acpi_table_header *table)
259{
260 struct acpi_table_srat *srat;
261 if (!table)
262 return -EINVAL;
263
264 srat = (struct acpi_table_srat *)table;
265 acpi_srat_revision = srat->header.revision;
266
267 /* Real work done in acpi_table_parse_srat below. */
268
269 return 0;
270}
271
272static int __init
273acpi_table_parse_srat(enum acpi_srat_type id,
274 acpi_table_entry_handler handler, unsigned int max_entries)
275{
276 return acpi_table_parse_entries(ACPI_SIG_SRAT,
277 sizeof(struct acpi_table_srat), id,
278 handler, max_entries);
279}
280
281int __init acpi_numa_init(void)
282{
283 int cnt = 0;
284
285 /*
286 * Should not limit number with cpu num that is from NR_CPUS or nr_cpus=
287 * SRAT cpu entries could have different order with that in MADT.
288 * So go over all cpu entries in SRAT to get apicid to node mapping.
289 */
290
291 /* SRAT: Static Resource Affinity Table */
292 if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) {
293 acpi_table_parse_srat(ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY,
294 acpi_parse_x2apic_affinity, 0);
295 acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY,
296 acpi_parse_processor_affinity, 0);
297 cnt = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY,
298 acpi_parse_memory_affinity,
299 NR_NODE_MEMBLKS);
300 }
301
302 /* SLIT: System Locality Information Table */
303 acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit);
304
305 acpi_numa_arch_fixup();
306
307 if (cnt <= 0)
308 return cnt ?: -ENOENT;
309 return 0;
310}
311
312int acpi_get_pxm(acpi_handle h)
313{
314 unsigned long long pxm;
315 acpi_status status;
316 acpi_handle handle;
317 acpi_handle phandle = h;
318
319 do {
320 handle = phandle;
321 status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
322 if (ACPI_SUCCESS(status))
323 return pxm;
324 status = acpi_get_parent(handle, &phandle);
325 } while (ACPI_SUCCESS(status));
326 return -1;
327}
328
329int acpi_get_node(acpi_handle *handle)
330{
331 int pxm, node = -1;
332
333 pxm = acpi_get_pxm(handle);
334 if (pxm >= 0 && pxm < MAX_PXM_DOMAINS)
335 node = acpi_map_pxm_to_node(pxm);
336
337 return node;
338}
339EXPORT_SYMBOL(acpi_get_node);
1/*
2 * acpi_numa.c - ACPI NUMA support
3 *
4 * Copyright (C) 2002 Takayoshi Kochi <t-kochi@bq.jp.nec.com>
5 *
6 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
19 *
20 */
21
22#define pr_fmt(fmt) "ACPI: " fmt
23
24#include <linux/module.h>
25#include <linux/init.h>
26#include <linux/kernel.h>
27#include <linux/types.h>
28#include <linux/errno.h>
29#include <linux/acpi.h>
30#include <linux/bootmem.h>
31#include <linux/memblock.h>
32#include <linux/numa.h>
33#include <linux/nodemask.h>
34#include <linux/topology.h>
35
36static nodemask_t nodes_found_map = NODE_MASK_NONE;
37
38/* maps to convert between proximity domain and logical node ID */
39static int pxm_to_node_map[MAX_PXM_DOMAINS]
40 = { [0 ... MAX_PXM_DOMAINS - 1] = NUMA_NO_NODE };
41static int node_to_pxm_map[MAX_NUMNODES]
42 = { [0 ... MAX_NUMNODES - 1] = PXM_INVAL };
43
44unsigned char acpi_srat_revision __initdata;
45int acpi_numa __initdata;
46
47int pxm_to_node(int pxm)
48{
49 if (pxm < 0)
50 return NUMA_NO_NODE;
51 return pxm_to_node_map[pxm];
52}
53
54int node_to_pxm(int node)
55{
56 if (node < 0)
57 return PXM_INVAL;
58 return node_to_pxm_map[node];
59}
60
61static void __acpi_map_pxm_to_node(int pxm, int node)
62{
63 if (pxm_to_node_map[pxm] == NUMA_NO_NODE || node < pxm_to_node_map[pxm])
64 pxm_to_node_map[pxm] = node;
65 if (node_to_pxm_map[node] == PXM_INVAL || pxm < node_to_pxm_map[node])
66 node_to_pxm_map[node] = pxm;
67}
68
69int acpi_map_pxm_to_node(int pxm)
70{
71 int node;
72
73 if (pxm < 0 || pxm >= MAX_PXM_DOMAINS || numa_off)
74 return NUMA_NO_NODE;
75
76 node = pxm_to_node_map[pxm];
77
78 if (node == NUMA_NO_NODE) {
79 if (nodes_weight(nodes_found_map) >= MAX_NUMNODES)
80 return NUMA_NO_NODE;
81 node = first_unset_node(nodes_found_map);
82 __acpi_map_pxm_to_node(pxm, node);
83 node_set(node, nodes_found_map);
84 }
85
86 return node;
87}
88
89/**
90 * acpi_map_pxm_to_online_node - Map proximity ID to online node
91 * @pxm: ACPI proximity ID
92 *
93 * This is similar to acpi_map_pxm_to_node(), but always returns an online
94 * node. When the mapped node from a given proximity ID is offline, it
95 * looks up the node distance table and returns the nearest online node.
96 *
97 * ACPI device drivers, which are called after the NUMA initialization has
98 * completed in the kernel, can call this interface to obtain their device
99 * NUMA topology from ACPI tables. Such drivers do not have to deal with
100 * offline nodes. A node may be offline when a device proximity ID is
101 * unique, SRAT memory entry does not exist, or NUMA is disabled, ex.
102 * "numa=off" on x86.
103 */
104int acpi_map_pxm_to_online_node(int pxm)
105{
106 int node, min_node;
107
108 node = acpi_map_pxm_to_node(pxm);
109
110 if (node == NUMA_NO_NODE)
111 node = 0;
112
113 min_node = node;
114 if (!node_online(node)) {
115 int min_dist = INT_MAX, dist, n;
116
117 for_each_online_node(n) {
118 dist = node_distance(node, n);
119 if (dist < min_dist) {
120 min_dist = dist;
121 min_node = n;
122 }
123 }
124 }
125
126 return min_node;
127}
128EXPORT_SYMBOL(acpi_map_pxm_to_online_node);
129
130static void __init
131acpi_table_print_srat_entry(struct acpi_subtable_header *header)
132{
133 switch (header->type) {
134 case ACPI_SRAT_TYPE_CPU_AFFINITY:
135 {
136 struct acpi_srat_cpu_affinity *p =
137 (struct acpi_srat_cpu_affinity *)header;
138 pr_debug("SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n",
139 p->apic_id, p->local_sapic_eid,
140 p->proximity_domain_lo,
141 (p->flags & ACPI_SRAT_CPU_ENABLED) ?
142 "enabled" : "disabled");
143 }
144 break;
145
146 case ACPI_SRAT_TYPE_MEMORY_AFFINITY:
147 {
148 struct acpi_srat_mem_affinity *p =
149 (struct acpi_srat_mem_affinity *)header;
150 pr_debug("SRAT Memory (0x%lx length 0x%lx) in proximity domain %d %s%s%s\n",
151 (unsigned long)p->base_address,
152 (unsigned long)p->length,
153 p->proximity_domain,
154 (p->flags & ACPI_SRAT_MEM_ENABLED) ?
155 "enabled" : "disabled",
156 (p->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE) ?
157 " hot-pluggable" : "",
158 (p->flags & ACPI_SRAT_MEM_NON_VOLATILE) ?
159 " non-volatile" : "");
160 }
161 break;
162
163 case ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY:
164 {
165 struct acpi_srat_x2apic_cpu_affinity *p =
166 (struct acpi_srat_x2apic_cpu_affinity *)header;
167 pr_debug("SRAT Processor (x2apicid[0x%08x]) in proximity domain %d %s\n",
168 p->apic_id,
169 p->proximity_domain,
170 (p->flags & ACPI_SRAT_CPU_ENABLED) ?
171 "enabled" : "disabled");
172 }
173 break;
174
175 case ACPI_SRAT_TYPE_GICC_AFFINITY:
176 {
177 struct acpi_srat_gicc_affinity *p =
178 (struct acpi_srat_gicc_affinity *)header;
179 pr_debug("SRAT Processor (acpi id[0x%04x]) in proximity domain %d %s\n",
180 p->acpi_processor_uid,
181 p->proximity_domain,
182 (p->flags & ACPI_SRAT_GICC_ENABLED) ?
183 "enabled" : "disabled");
184 }
185 break;
186
187 default:
188 pr_warn("Found unsupported SRAT entry (type = 0x%x)\n",
189 header->type);
190 break;
191 }
192}
193
194/*
195 * A lot of BIOS fill in 10 (= no distance) everywhere. This messes
196 * up the NUMA heuristics which wants the local node to have a smaller
197 * distance than the others.
198 * Do some quick checks here and only use the SLIT if it passes.
199 */
200static int __init slit_valid(struct acpi_table_slit *slit)
201{
202 int i, j;
203 int d = slit->locality_count;
204 for (i = 0; i < d; i++) {
205 for (j = 0; j < d; j++) {
206 u8 val = slit->entry[d*i + j];
207 if (i == j) {
208 if (val != LOCAL_DISTANCE)
209 return 0;
210 } else if (val <= LOCAL_DISTANCE)
211 return 0;
212 }
213 }
214 return 1;
215}
216
217void __init bad_srat(void)
218{
219 pr_err("SRAT: SRAT not used.\n");
220 acpi_numa = -1;
221}
222
223int __init srat_disabled(void)
224{
225 return acpi_numa < 0;
226}
227
228#if defined(CONFIG_X86) || defined(CONFIG_ARM64)
229/*
230 * Callback for SLIT parsing. pxm_to_node() returns NUMA_NO_NODE for
231 * I/O localities since SRAT does not list them. I/O localities are
232 * not supported at this point.
233 */
234void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
235{
236 int i, j;
237
238 for (i = 0; i < slit->locality_count; i++) {
239 const int from_node = pxm_to_node(i);
240
241 if (from_node == NUMA_NO_NODE)
242 continue;
243
244 for (j = 0; j < slit->locality_count; j++) {
245 const int to_node = pxm_to_node(j);
246
247 if (to_node == NUMA_NO_NODE)
248 continue;
249
250 numa_set_distance(from_node, to_node,
251 slit->entry[slit->locality_count * i + j]);
252 }
253 }
254}
255
256/*
257 * Default callback for parsing of the Proximity Domain <-> Memory
258 * Area mappings
259 */
260int __init
261acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
262{
263 u64 start, end;
264 u32 hotpluggable;
265 int node, pxm;
266
267 if (srat_disabled())
268 goto out_err;
269 if (ma->header.length < sizeof(struct acpi_srat_mem_affinity)) {
270 pr_err("SRAT: Unexpected header length: %d\n",
271 ma->header.length);
272 goto out_err_bad_srat;
273 }
274 if ((ma->flags & ACPI_SRAT_MEM_ENABLED) == 0)
275 goto out_err;
276 hotpluggable = ma->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE;
277 if (hotpluggable && !IS_ENABLED(CONFIG_MEMORY_HOTPLUG))
278 goto out_err;
279
280 start = ma->base_address;
281 end = start + ma->length;
282 pxm = ma->proximity_domain;
283 if (acpi_srat_revision <= 1)
284 pxm &= 0xff;
285
286 node = acpi_map_pxm_to_node(pxm);
287 if (node == NUMA_NO_NODE || node >= MAX_NUMNODES) {
288 pr_err("SRAT: Too many proximity domains.\n");
289 goto out_err_bad_srat;
290 }
291
292 if (numa_add_memblk(node, start, end) < 0) {
293 pr_err("SRAT: Failed to add memblk to node %u [mem %#010Lx-%#010Lx]\n",
294 node, (unsigned long long) start,
295 (unsigned long long) end - 1);
296 goto out_err_bad_srat;
297 }
298
299 node_set(node, numa_nodes_parsed);
300
301 pr_info("SRAT: Node %u PXM %u [mem %#010Lx-%#010Lx]%s%s\n",
302 node, pxm,
303 (unsigned long long) start, (unsigned long long) end - 1,
304 hotpluggable ? " hotplug" : "",
305 ma->flags & ACPI_SRAT_MEM_NON_VOLATILE ? " non-volatile" : "");
306
307 /* Mark hotplug range in memblock. */
308 if (hotpluggable && memblock_mark_hotplug(start, ma->length))
309 pr_warn("SRAT: Failed to mark hotplug range [mem %#010Lx-%#010Lx] in memblock\n",
310 (unsigned long long)start, (unsigned long long)end - 1);
311
312 max_possible_pfn = max(max_possible_pfn, PFN_UP(end - 1));
313
314 return 0;
315out_err_bad_srat:
316 bad_srat();
317out_err:
318 return -EINVAL;
319}
320#endif /* defined(CONFIG_X86) || defined (CONFIG_ARM64) */
321
322static int __init acpi_parse_slit(struct acpi_table_header *table)
323{
324 struct acpi_table_slit *slit = (struct acpi_table_slit *)table;
325
326 if (!slit_valid(slit)) {
327 pr_info("SLIT table looks invalid. Not used.\n");
328 return -EINVAL;
329 }
330 acpi_numa_slit_init(slit);
331
332 return 0;
333}
334
335void __init __weak
336acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa)
337{
338 pr_warn("Found unsupported x2apic [0x%08x] SRAT entry\n", pa->apic_id);
339}
340
341static int __init
342acpi_parse_x2apic_affinity(struct acpi_subtable_header *header,
343 const unsigned long end)
344{
345 struct acpi_srat_x2apic_cpu_affinity *processor_affinity;
346
347 processor_affinity = (struct acpi_srat_x2apic_cpu_affinity *)header;
348 if (!processor_affinity)
349 return -EINVAL;
350
351 acpi_table_print_srat_entry(header);
352
353 /* let architecture-dependent part to do it */
354 acpi_numa_x2apic_affinity_init(processor_affinity);
355
356 return 0;
357}
358
359static int __init
360acpi_parse_processor_affinity(struct acpi_subtable_header *header,
361 const unsigned long end)
362{
363 struct acpi_srat_cpu_affinity *processor_affinity;
364
365 processor_affinity = (struct acpi_srat_cpu_affinity *)header;
366 if (!processor_affinity)
367 return -EINVAL;
368
369 acpi_table_print_srat_entry(header);
370
371 /* let architecture-dependent part to do it */
372 acpi_numa_processor_affinity_init(processor_affinity);
373
374 return 0;
375}
376
377static int __init
378acpi_parse_gicc_affinity(struct acpi_subtable_header *header,
379 const unsigned long end)
380{
381 struct acpi_srat_gicc_affinity *processor_affinity;
382
383 processor_affinity = (struct acpi_srat_gicc_affinity *)header;
384 if (!processor_affinity)
385 return -EINVAL;
386
387 acpi_table_print_srat_entry(header);
388
389 /* let architecture-dependent part to do it */
390 acpi_numa_gicc_affinity_init(processor_affinity);
391
392 return 0;
393}
394
395static int __initdata parsed_numa_memblks;
396
397static int __init
398acpi_parse_memory_affinity(struct acpi_subtable_header * header,
399 const unsigned long end)
400{
401 struct acpi_srat_mem_affinity *memory_affinity;
402
403 memory_affinity = (struct acpi_srat_mem_affinity *)header;
404 if (!memory_affinity)
405 return -EINVAL;
406
407 acpi_table_print_srat_entry(header);
408
409 /* let architecture-dependent part to do it */
410 if (!acpi_numa_memory_affinity_init(memory_affinity))
411 parsed_numa_memblks++;
412 return 0;
413}
414
415static int __init acpi_parse_srat(struct acpi_table_header *table)
416{
417 struct acpi_table_srat *srat = (struct acpi_table_srat *)table;
418
419 acpi_srat_revision = srat->header.revision;
420
421 /* Real work done in acpi_table_parse_srat below. */
422
423 return 0;
424}
425
426static int __init
427acpi_table_parse_srat(enum acpi_srat_type id,
428 acpi_tbl_entry_handler handler, unsigned int max_entries)
429{
430 return acpi_table_parse_entries(ACPI_SIG_SRAT,
431 sizeof(struct acpi_table_srat), id,
432 handler, max_entries);
433}
434
435int __init acpi_numa_init(void)
436{
437 int cnt = 0;
438
439 if (acpi_disabled)
440 return -EINVAL;
441
442 /*
443 * Should not limit number with cpu num that is from NR_CPUS or nr_cpus=
444 * SRAT cpu entries could have different order with that in MADT.
445 * So go over all cpu entries in SRAT to get apicid to node mapping.
446 */
447
448 /* SRAT: System Resource Affinity Table */
449 if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) {
450 struct acpi_subtable_proc srat_proc[3];
451
452 memset(srat_proc, 0, sizeof(srat_proc));
453 srat_proc[0].id = ACPI_SRAT_TYPE_CPU_AFFINITY;
454 srat_proc[0].handler = acpi_parse_processor_affinity;
455 srat_proc[1].id = ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY;
456 srat_proc[1].handler = acpi_parse_x2apic_affinity;
457 srat_proc[2].id = ACPI_SRAT_TYPE_GICC_AFFINITY;
458 srat_proc[2].handler = acpi_parse_gicc_affinity;
459
460 acpi_table_parse_entries_array(ACPI_SIG_SRAT,
461 sizeof(struct acpi_table_srat),
462 srat_proc, ARRAY_SIZE(srat_proc), 0);
463
464 cnt = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY,
465 acpi_parse_memory_affinity, 0);
466 }
467
468 /* SLIT: System Locality Information Table */
469 acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit);
470
471 if (cnt < 0)
472 return cnt;
473 else if (!parsed_numa_memblks)
474 return -ENOENT;
475 return 0;
476}
477
478static int acpi_get_pxm(acpi_handle h)
479{
480 unsigned long long pxm;
481 acpi_status status;
482 acpi_handle handle;
483 acpi_handle phandle = h;
484
485 do {
486 handle = phandle;
487 status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
488 if (ACPI_SUCCESS(status))
489 return pxm;
490 status = acpi_get_parent(handle, &phandle);
491 } while (ACPI_SUCCESS(status));
492 return -1;
493}
494
495int acpi_get_node(acpi_handle handle)
496{
497 int pxm;
498
499 pxm = acpi_get_pxm(handle);
500
501 return acpi_map_pxm_to_node(pxm);
502}
503EXPORT_SYMBOL(acpi_get_node);