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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
48int pxm_to_node(int pxm)
49{
50 if (pxm < 0)
51 return NUMA_NO_NODE;
52 return pxm_to_node_map[pxm];
53}
54
55int node_to_pxm(int node)
56{
57 if (node < 0)
58 return PXM_INVAL;
59 return node_to_pxm_map[node];
60}
61
62void __acpi_map_pxm_to_node(int pxm, int node)
63{
64 if (pxm_to_node_map[pxm] == NUMA_NO_NODE || node < pxm_to_node_map[pxm])
65 pxm_to_node_map[pxm] = node;
66 if (node_to_pxm_map[node] == PXM_INVAL || pxm < node_to_pxm_map[node])
67 node_to_pxm_map[node] = pxm;
68}
69
70int acpi_map_pxm_to_node(int pxm)
71{
72 int node = pxm_to_node_map[pxm];
73
74 if (node < 0) {
75 if (nodes_weight(nodes_found_map) >= MAX_NUMNODES)
76 return NUMA_NO_NODE;
77 node = first_unset_node(nodes_found_map);
78 __acpi_map_pxm_to_node(pxm, node);
79 node_set(node, nodes_found_map);
80 }
81
82 return node;
83}
84
85static void __init
86acpi_table_print_srat_entry(struct acpi_subtable_header *header)
87{
88
89 ACPI_FUNCTION_NAME("acpi_table_print_srat_entry");
90
91 if (!header)
92 return;
93
94 switch (header->type) {
95
96 case ACPI_SRAT_TYPE_CPU_AFFINITY:
97#ifdef ACPI_DEBUG_OUTPUT
98 {
99 struct acpi_srat_cpu_affinity *p =
100 (struct acpi_srat_cpu_affinity *)header;
101 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
102 "SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n",
103 p->apic_id, p->local_sapic_eid,
104 p->proximity_domain_lo,
105 (p->flags & ACPI_SRAT_CPU_ENABLED)?
106 "enabled" : "disabled"));
107 }
108#endif /* ACPI_DEBUG_OUTPUT */
109 break;
110
111 case ACPI_SRAT_TYPE_MEMORY_AFFINITY:
112#ifdef ACPI_DEBUG_OUTPUT
113 {
114 struct acpi_srat_mem_affinity *p =
115 (struct acpi_srat_mem_affinity *)header;
116 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
117 "SRAT Memory (0x%lx length 0x%lx) in proximity domain %d %s%s\n",
118 (unsigned long)p->base_address,
119 (unsigned long)p->length,
120 p->proximity_domain,
121 (p->flags & ACPI_SRAT_MEM_ENABLED)?
122 "enabled" : "disabled",
123 (p->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE)?
124 " hot-pluggable" : ""));
125 }
126#endif /* ACPI_DEBUG_OUTPUT */
127 break;
128
129 case ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY:
130#ifdef ACPI_DEBUG_OUTPUT
131 {
132 struct acpi_srat_x2apic_cpu_affinity *p =
133 (struct acpi_srat_x2apic_cpu_affinity *)header;
134 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
135 "SRAT Processor (x2apicid[0x%08x]) in"
136 " proximity domain %d %s\n",
137 p->apic_id,
138 p->proximity_domain,
139 (p->flags & ACPI_SRAT_CPU_ENABLED) ?
140 "enabled" : "disabled"));
141 }
142#endif /* ACPI_DEBUG_OUTPUT */
143 break;
144 default:
145 printk(KERN_WARNING PREFIX
146 "Found unsupported SRAT entry (type = 0x%x)\n",
147 header->type);
148 break;
149 }
150}
151
152/*
153 * A lot of BIOS fill in 10 (= no distance) everywhere. This messes
154 * up the NUMA heuristics which wants the local node to have a smaller
155 * distance than the others.
156 * Do some quick checks here and only use the SLIT if it passes.
157 */
158static __init int slit_valid(struct acpi_table_slit *slit)
159{
160 int i, j;
161 int d = slit->locality_count;
162 for (i = 0; i < d; i++) {
163 for (j = 0; j < d; j++) {
164 u8 val = slit->entry[d*i + j];
165 if (i == j) {
166 if (val != LOCAL_DISTANCE)
167 return 0;
168 } else if (val <= LOCAL_DISTANCE)
169 return 0;
170 }
171 }
172 return 1;
173}
174
175static int __init acpi_parse_slit(struct acpi_table_header *table)
176{
177 struct acpi_table_slit *slit;
178
179 if (!table)
180 return -EINVAL;
181
182 slit = (struct acpi_table_slit *)table;
183
184 if (!slit_valid(slit)) {
185 printk(KERN_INFO "ACPI: SLIT table looks invalid. Not used.\n");
186 return -EINVAL;
187 }
188 acpi_numa_slit_init(slit);
189
190 return 0;
191}
192
193void __init __attribute__ ((weak))
194acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa)
195{
196 printk(KERN_WARNING PREFIX
197 "Found unsupported x2apic [0x%08x] SRAT entry\n", pa->apic_id);
198 return;
199}
200
201
202static int __init
203acpi_parse_x2apic_affinity(struct acpi_subtable_header *header,
204 const unsigned long end)
205{
206 struct acpi_srat_x2apic_cpu_affinity *processor_affinity;
207
208 processor_affinity = (struct acpi_srat_x2apic_cpu_affinity *)header;
209 if (!processor_affinity)
210 return -EINVAL;
211
212 acpi_table_print_srat_entry(header);
213
214 /* let architecture-dependent part to do it */
215 acpi_numa_x2apic_affinity_init(processor_affinity);
216
217 return 0;
218}
219
220static int __init
221acpi_parse_processor_affinity(struct acpi_subtable_header *header,
222 const unsigned long end)
223{
224 struct acpi_srat_cpu_affinity *processor_affinity;
225
226 processor_affinity = (struct acpi_srat_cpu_affinity *)header;
227 if (!processor_affinity)
228 return -EINVAL;
229
230 acpi_table_print_srat_entry(header);
231
232 /* let architecture-dependent part to do it */
233 acpi_numa_processor_affinity_init(processor_affinity);
234
235 return 0;
236}
237
238static int __init
239acpi_parse_memory_affinity(struct acpi_subtable_header * header,
240 const unsigned long end)
241{
242 struct acpi_srat_mem_affinity *memory_affinity;
243
244 memory_affinity = (struct acpi_srat_mem_affinity *)header;
245 if (!memory_affinity)
246 return -EINVAL;
247
248 acpi_table_print_srat_entry(header);
249
250 /* let architecture-dependent part to do it */
251 acpi_numa_memory_affinity_init(memory_affinity);
252
253 return 0;
254}
255
256static int __init acpi_parse_srat(struct acpi_table_header *table)
257{
258 if (!table)
259 return -EINVAL;
260
261 /* Real work done in acpi_table_parse_srat below. */
262
263 return 0;
264}
265
266static int __init
267acpi_table_parse_srat(enum acpi_srat_type id,
268 acpi_table_entry_handler handler, unsigned int max_entries)
269{
270 return acpi_table_parse_entries(ACPI_SIG_SRAT,
271 sizeof(struct acpi_table_srat), id,
272 handler, max_entries);
273}
274
275int __init acpi_numa_init(void)
276{
277 int cnt = 0;
278
279 /*
280 * Should not limit number with cpu num that is from NR_CPUS or nr_cpus=
281 * SRAT cpu entries could have different order with that in MADT.
282 * So go over all cpu entries in SRAT to get apicid to node mapping.
283 */
284
285 /* SRAT: Static Resource Affinity Table */
286 if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) {
287 acpi_table_parse_srat(ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY,
288 acpi_parse_x2apic_affinity, 0);
289 acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY,
290 acpi_parse_processor_affinity, 0);
291 cnt = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY,
292 acpi_parse_memory_affinity,
293 NR_NODE_MEMBLKS);
294 }
295
296 /* SLIT: System Locality Information Table */
297 acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit);
298
299 acpi_numa_arch_fixup();
300
301 if (cnt <= 0)
302 return cnt ?: -ENOENT;
303 return 0;
304}
305
306int acpi_get_pxm(acpi_handle h)
307{
308 unsigned long long pxm;
309 acpi_status status;
310 acpi_handle handle;
311 acpi_handle phandle = h;
312
313 do {
314 handle = phandle;
315 status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
316 if (ACPI_SUCCESS(status))
317 return pxm;
318 status = acpi_get_parent(handle, &phandle);
319 } while (ACPI_SUCCESS(status));
320 return -1;
321}
322
323int acpi_get_node(acpi_handle *handle)
324{
325 int pxm, node = -1;
326
327 pxm = acpi_get_pxm(handle);
328 if (pxm >= 0 && pxm < MAX_PXM_DOMAINS)
329 node = acpi_map_pxm_to_node(pxm);
330
331 return node;
332}
333EXPORT_SYMBOL(acpi_get_node);
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * acpi_numa.c - ACPI NUMA support
4 *
5 * Copyright (C) 2002 Takayoshi Kochi <t-kochi@bq.jp.nec.com>
6 */
7
8#define pr_fmt(fmt) "ACPI: " fmt
9
10#include <linux/module.h>
11#include <linux/init.h>
12#include <linux/kernel.h>
13#include <linux/types.h>
14#include <linux/errno.h>
15#include <linux/acpi.h>
16#include <linux/memblock.h>
17#include <linux/numa.h>
18#include <linux/nodemask.h>
19#include <linux/topology.h>
20
21static nodemask_t nodes_found_map = NODE_MASK_NONE;
22
23/* maps to convert between proximity domain and logical node ID */
24static int pxm_to_node_map[MAX_PXM_DOMAINS]
25 = { [0 ... MAX_PXM_DOMAINS - 1] = NUMA_NO_NODE };
26static int node_to_pxm_map[MAX_NUMNODES]
27 = { [0 ... MAX_NUMNODES - 1] = PXM_INVAL };
28
29unsigned char acpi_srat_revision __initdata;
30int acpi_numa __initdata;
31
32int pxm_to_node(int pxm)
33{
34 if (pxm < 0)
35 return NUMA_NO_NODE;
36 return pxm_to_node_map[pxm];
37}
38
39int node_to_pxm(int node)
40{
41 if (node < 0)
42 return PXM_INVAL;
43 return node_to_pxm_map[node];
44}
45
46static void __acpi_map_pxm_to_node(int pxm, int node)
47{
48 if (pxm_to_node_map[pxm] == NUMA_NO_NODE || node < pxm_to_node_map[pxm])
49 pxm_to_node_map[pxm] = node;
50 if (node_to_pxm_map[node] == PXM_INVAL || pxm < node_to_pxm_map[node])
51 node_to_pxm_map[node] = pxm;
52}
53
54int acpi_map_pxm_to_node(int pxm)
55{
56 int node;
57
58 if (pxm < 0 || pxm >= MAX_PXM_DOMAINS || numa_off)
59 return NUMA_NO_NODE;
60
61 node = pxm_to_node_map[pxm];
62
63 if (node == NUMA_NO_NODE) {
64 if (nodes_weight(nodes_found_map) >= MAX_NUMNODES)
65 return NUMA_NO_NODE;
66 node = first_unset_node(nodes_found_map);
67 __acpi_map_pxm_to_node(pxm, node);
68 node_set(node, nodes_found_map);
69 }
70
71 return node;
72}
73EXPORT_SYMBOL(acpi_map_pxm_to_node);
74
75/**
76 * acpi_map_pxm_to_online_node - Map proximity ID to online node
77 * @pxm: ACPI proximity ID
78 *
79 * This is similar to acpi_map_pxm_to_node(), but always returns an online
80 * node. When the mapped node from a given proximity ID is offline, it
81 * looks up the node distance table and returns the nearest online node.
82 *
83 * ACPI device drivers, which are called after the NUMA initialization has
84 * completed in the kernel, can call this interface to obtain their device
85 * NUMA topology from ACPI tables. Such drivers do not have to deal with
86 * offline nodes. A node may be offline when a device proximity ID is
87 * unique, SRAT memory entry does not exist, or NUMA is disabled, ex.
88 * "numa=off" on x86.
89 */
90int acpi_map_pxm_to_online_node(int pxm)
91{
92 int node, min_node;
93
94 node = acpi_map_pxm_to_node(pxm);
95
96 if (node == NUMA_NO_NODE)
97 node = 0;
98
99 min_node = node;
100 if (!node_online(node)) {
101 int min_dist = INT_MAX, dist, n;
102
103 for_each_online_node(n) {
104 dist = node_distance(node, n);
105 if (dist < min_dist) {
106 min_dist = dist;
107 min_node = n;
108 }
109 }
110 }
111
112 return min_node;
113}
114EXPORT_SYMBOL(acpi_map_pxm_to_online_node);
115
116static void __init
117acpi_table_print_srat_entry(struct acpi_subtable_header *header)
118{
119 switch (header->type) {
120 case ACPI_SRAT_TYPE_CPU_AFFINITY:
121 {
122 struct acpi_srat_cpu_affinity *p =
123 (struct acpi_srat_cpu_affinity *)header;
124 pr_debug("SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n",
125 p->apic_id, p->local_sapic_eid,
126 p->proximity_domain_lo,
127 (p->flags & ACPI_SRAT_CPU_ENABLED) ?
128 "enabled" : "disabled");
129 }
130 break;
131
132 case ACPI_SRAT_TYPE_MEMORY_AFFINITY:
133 {
134 struct acpi_srat_mem_affinity *p =
135 (struct acpi_srat_mem_affinity *)header;
136 pr_debug("SRAT Memory (0x%llx length 0x%llx) in proximity domain %d %s%s%s\n",
137 (unsigned long long)p->base_address,
138 (unsigned long long)p->length,
139 p->proximity_domain,
140 (p->flags & ACPI_SRAT_MEM_ENABLED) ?
141 "enabled" : "disabled",
142 (p->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE) ?
143 " hot-pluggable" : "",
144 (p->flags & ACPI_SRAT_MEM_NON_VOLATILE) ?
145 " non-volatile" : "");
146 }
147 break;
148
149 case ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY:
150 {
151 struct acpi_srat_x2apic_cpu_affinity *p =
152 (struct acpi_srat_x2apic_cpu_affinity *)header;
153 pr_debug("SRAT Processor (x2apicid[0x%08x]) in proximity domain %d %s\n",
154 p->apic_id,
155 p->proximity_domain,
156 (p->flags & ACPI_SRAT_CPU_ENABLED) ?
157 "enabled" : "disabled");
158 }
159 break;
160
161 case ACPI_SRAT_TYPE_GICC_AFFINITY:
162 {
163 struct acpi_srat_gicc_affinity *p =
164 (struct acpi_srat_gicc_affinity *)header;
165 pr_debug("SRAT Processor (acpi id[0x%04x]) in proximity domain %d %s\n",
166 p->acpi_processor_uid,
167 p->proximity_domain,
168 (p->flags & ACPI_SRAT_GICC_ENABLED) ?
169 "enabled" : "disabled");
170 }
171 break;
172
173 default:
174 pr_warn("Found unsupported SRAT entry (type = 0x%x)\n",
175 header->type);
176 break;
177 }
178}
179
180/*
181 * A lot of BIOS fill in 10 (= no distance) everywhere. This messes
182 * up the NUMA heuristics which wants the local node to have a smaller
183 * distance than the others.
184 * Do some quick checks here and only use the SLIT if it passes.
185 */
186static int __init slit_valid(struct acpi_table_slit *slit)
187{
188 int i, j;
189 int d = slit->locality_count;
190 for (i = 0; i < d; i++) {
191 for (j = 0; j < d; j++) {
192 u8 val = slit->entry[d*i + j];
193 if (i == j) {
194 if (val != LOCAL_DISTANCE)
195 return 0;
196 } else if (val <= LOCAL_DISTANCE)
197 return 0;
198 }
199 }
200 return 1;
201}
202
203void __init bad_srat(void)
204{
205 pr_err("SRAT: SRAT not used.\n");
206 acpi_numa = -1;
207}
208
209int __init srat_disabled(void)
210{
211 return acpi_numa < 0;
212}
213
214#if defined(CONFIG_X86) || defined(CONFIG_ARM64)
215/*
216 * Callback for SLIT parsing. pxm_to_node() returns NUMA_NO_NODE for
217 * I/O localities since SRAT does not list them. I/O localities are
218 * not supported at this point.
219 */
220void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
221{
222 int i, j;
223
224 for (i = 0; i < slit->locality_count; i++) {
225 const int from_node = pxm_to_node(i);
226
227 if (from_node == NUMA_NO_NODE)
228 continue;
229
230 for (j = 0; j < slit->locality_count; j++) {
231 const int to_node = pxm_to_node(j);
232
233 if (to_node == NUMA_NO_NODE)
234 continue;
235
236 numa_set_distance(from_node, to_node,
237 slit->entry[slit->locality_count * i + j]);
238 }
239 }
240}
241
242/*
243 * Default callback for parsing of the Proximity Domain <-> Memory
244 * Area mappings
245 */
246int __init
247acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
248{
249 u64 start, end;
250 u32 hotpluggable;
251 int node, pxm;
252
253 if (srat_disabled())
254 goto out_err;
255 if (ma->header.length < sizeof(struct acpi_srat_mem_affinity)) {
256 pr_err("SRAT: Unexpected header length: %d\n",
257 ma->header.length);
258 goto out_err_bad_srat;
259 }
260 if ((ma->flags & ACPI_SRAT_MEM_ENABLED) == 0)
261 goto out_err;
262 hotpluggable = ma->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE;
263 if (hotpluggable && !IS_ENABLED(CONFIG_MEMORY_HOTPLUG))
264 goto out_err;
265
266 start = ma->base_address;
267 end = start + ma->length;
268 pxm = ma->proximity_domain;
269 if (acpi_srat_revision <= 1)
270 pxm &= 0xff;
271
272 node = acpi_map_pxm_to_node(pxm);
273 if (node == NUMA_NO_NODE || node >= MAX_NUMNODES) {
274 pr_err("SRAT: Too many proximity domains.\n");
275 goto out_err_bad_srat;
276 }
277
278 if (numa_add_memblk(node, start, end) < 0) {
279 pr_err("SRAT: Failed to add memblk to node %u [mem %#010Lx-%#010Lx]\n",
280 node, (unsigned long long) start,
281 (unsigned long long) end - 1);
282 goto out_err_bad_srat;
283 }
284
285 node_set(node, numa_nodes_parsed);
286
287 pr_info("SRAT: Node %u PXM %u [mem %#010Lx-%#010Lx]%s%s\n",
288 node, pxm,
289 (unsigned long long) start, (unsigned long long) end - 1,
290 hotpluggable ? " hotplug" : "",
291 ma->flags & ACPI_SRAT_MEM_NON_VOLATILE ? " non-volatile" : "");
292
293 /* Mark hotplug range in memblock. */
294 if (hotpluggable && memblock_mark_hotplug(start, ma->length))
295 pr_warn("SRAT: Failed to mark hotplug range [mem %#010Lx-%#010Lx] in memblock\n",
296 (unsigned long long)start, (unsigned long long)end - 1);
297
298 max_possible_pfn = max(max_possible_pfn, PFN_UP(end - 1));
299
300 return 0;
301out_err_bad_srat:
302 bad_srat();
303out_err:
304 return -EINVAL;
305}
306#endif /* defined(CONFIG_X86) || defined (CONFIG_ARM64) */
307
308static int __init acpi_parse_slit(struct acpi_table_header *table)
309{
310 struct acpi_table_slit *slit = (struct acpi_table_slit *)table;
311
312 if (!slit_valid(slit)) {
313 pr_info("SLIT table looks invalid. Not used.\n");
314 return -EINVAL;
315 }
316 acpi_numa_slit_init(slit);
317
318 return 0;
319}
320
321void __init __weak
322acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa)
323{
324 pr_warn("Found unsupported x2apic [0x%08x] SRAT entry\n", pa->apic_id);
325}
326
327static int __init
328acpi_parse_x2apic_affinity(union acpi_subtable_headers *header,
329 const unsigned long end)
330{
331 struct acpi_srat_x2apic_cpu_affinity *processor_affinity;
332
333 processor_affinity = (struct acpi_srat_x2apic_cpu_affinity *)header;
334 if (!processor_affinity)
335 return -EINVAL;
336
337 acpi_table_print_srat_entry(&header->common);
338
339 /* let architecture-dependent part to do it */
340 acpi_numa_x2apic_affinity_init(processor_affinity);
341
342 return 0;
343}
344
345static int __init
346acpi_parse_processor_affinity(union acpi_subtable_headers *header,
347 const unsigned long end)
348{
349 struct acpi_srat_cpu_affinity *processor_affinity;
350
351 processor_affinity = (struct acpi_srat_cpu_affinity *)header;
352 if (!processor_affinity)
353 return -EINVAL;
354
355 acpi_table_print_srat_entry(&header->common);
356
357 /* let architecture-dependent part to do it */
358 acpi_numa_processor_affinity_init(processor_affinity);
359
360 return 0;
361}
362
363static int __init
364acpi_parse_gicc_affinity(union acpi_subtable_headers *header,
365 const unsigned long end)
366{
367 struct acpi_srat_gicc_affinity *processor_affinity;
368
369 processor_affinity = (struct acpi_srat_gicc_affinity *)header;
370 if (!processor_affinity)
371 return -EINVAL;
372
373 acpi_table_print_srat_entry(&header->common);
374
375 /* let architecture-dependent part to do it */
376 acpi_numa_gicc_affinity_init(processor_affinity);
377
378 return 0;
379}
380
381static int __initdata parsed_numa_memblks;
382
383static int __init
384acpi_parse_memory_affinity(union acpi_subtable_headers * header,
385 const unsigned long end)
386{
387 struct acpi_srat_mem_affinity *memory_affinity;
388
389 memory_affinity = (struct acpi_srat_mem_affinity *)header;
390 if (!memory_affinity)
391 return -EINVAL;
392
393 acpi_table_print_srat_entry(&header->common);
394
395 /* let architecture-dependent part to do it */
396 if (!acpi_numa_memory_affinity_init(memory_affinity))
397 parsed_numa_memblks++;
398 return 0;
399}
400
401static int __init acpi_parse_srat(struct acpi_table_header *table)
402{
403 struct acpi_table_srat *srat = (struct acpi_table_srat *)table;
404
405 acpi_srat_revision = srat->header.revision;
406
407 /* Real work done in acpi_table_parse_srat below. */
408
409 return 0;
410}
411
412static int __init
413acpi_table_parse_srat(enum acpi_srat_type id,
414 acpi_tbl_entry_handler handler, unsigned int max_entries)
415{
416 return acpi_table_parse_entries(ACPI_SIG_SRAT,
417 sizeof(struct acpi_table_srat), id,
418 handler, max_entries);
419}
420
421int __init acpi_numa_init(void)
422{
423 int cnt = 0;
424
425 if (acpi_disabled)
426 return -EINVAL;
427
428 /*
429 * Should not limit number with cpu num that is from NR_CPUS or nr_cpus=
430 * SRAT cpu entries could have different order with that in MADT.
431 * So go over all cpu entries in SRAT to get apicid to node mapping.
432 */
433
434 /* SRAT: System Resource Affinity Table */
435 if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) {
436 struct acpi_subtable_proc srat_proc[3];
437
438 memset(srat_proc, 0, sizeof(srat_proc));
439 srat_proc[0].id = ACPI_SRAT_TYPE_CPU_AFFINITY;
440 srat_proc[0].handler = acpi_parse_processor_affinity;
441 srat_proc[1].id = ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY;
442 srat_proc[1].handler = acpi_parse_x2apic_affinity;
443 srat_proc[2].id = ACPI_SRAT_TYPE_GICC_AFFINITY;
444 srat_proc[2].handler = acpi_parse_gicc_affinity;
445
446 acpi_table_parse_entries_array(ACPI_SIG_SRAT,
447 sizeof(struct acpi_table_srat),
448 srat_proc, ARRAY_SIZE(srat_proc), 0);
449
450 cnt = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY,
451 acpi_parse_memory_affinity, 0);
452 }
453
454 /* SLIT: System Locality Information Table */
455 acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit);
456
457 if (cnt < 0)
458 return cnt;
459 else if (!parsed_numa_memblks)
460 return -ENOENT;
461 return 0;
462}
463
464static int acpi_get_pxm(acpi_handle h)
465{
466 unsigned long long pxm;
467 acpi_status status;
468 acpi_handle handle;
469 acpi_handle phandle = h;
470
471 do {
472 handle = phandle;
473 status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
474 if (ACPI_SUCCESS(status))
475 return pxm;
476 status = acpi_get_parent(handle, &phandle);
477 } while (ACPI_SUCCESS(status));
478 return -1;
479}
480
481int acpi_get_node(acpi_handle handle)
482{
483 int pxm;
484
485 pxm = acpi_get_pxm(handle);
486
487 return acpi_map_pxm_to_node(pxm);
488}
489EXPORT_SYMBOL(acpi_get_node);