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, see <http://www.gnu.org/licenses/>.
20 *
21 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
22 *
23 */
24 #include <xen/init.h>
25 #include <xen/types.h>
26 #include <xen/errno.h>
27 #include <xen/acpi.h>
28 #include <xen/numa.h>
29 #include <acpi/acmacros.h>
30
31 #define ACPI_NUMA 0x80000000
32 #define _COMPONENT ACPI_NUMA
33 ACPI_MODULE_NAME("numa")
34
35 int __initdata srat_rev;
36
acpi_table_print_srat_entry(struct acpi_subtable_header * header)37 void __init acpi_table_print_srat_entry(struct acpi_subtable_header * header)
38 {
39
40 ACPI_FUNCTION_NAME("acpi_table_print_srat_entry");
41
42 if (!header)
43 return;
44
45 switch (header->type) {
46
47 case ACPI_SRAT_TYPE_CPU_AFFINITY:
48 #ifdef ACPI_DEBUG_OUTPUT
49 {
50 struct acpi_srat_cpu_affinity *p =
51 container_of(header, struct acpi_srat_cpu_affinity, header);
52 u32 proximity_domain = p->proximity_domain_lo;
53
54 if (srat_rev >= 2) {
55 proximity_domain |= p->proximity_domain_hi[0] << 8;
56 proximity_domain |= p->proximity_domain_hi[1] << 16;
57 proximity_domain |= p->proximity_domain_hi[2] << 24;
58 }
59 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
60 "SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n",
61 p->apic_id, p->local_sapic_eid,
62 proximity_domain,
63 p->flags & ACPI_SRAT_CPU_ENABLED
64 ? "enabled" : "disabled"));
65 }
66 #endif /* ACPI_DEBUG_OUTPUT */
67 break;
68
69 case ACPI_SRAT_TYPE_MEMORY_AFFINITY:
70 #ifdef ACPI_DEBUG_OUTPUT
71 {
72 struct acpi_srat_mem_affinity *p =
73 container_of(header, struct acpi_srat_mem_affinity, header);
74 u32 proximity_domain = p->proximity_domain;
75
76 if (srat_rev < 2)
77 proximity_domain &= 0xff;
78 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
79 "SRAT Memory (%#"PRIx64
80 " length %#"PRIx64")"
81 " in proximity domain %d %s%s\n",
82 p->base_address, p->length,
83 proximity_domain,
84 p->flags & ACPI_SRAT_MEM_ENABLED
85 ? "enabled" : "disabled",
86 p->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE
87 ? " hot-pluggable" : ""));
88 }
89 #endif /* ACPI_DEBUG_OUTPUT */
90 break;
91
92 case ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY:
93 #ifdef ACPI_DEBUG_OUTPUT
94 {
95 struct acpi_srat_x2apic_cpu_affinity *p =
96 (struct acpi_srat_x2apic_cpu_affinity *)header;
97 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
98 "SRAT Processor (x2apicid[0x%08x]) in"
99 " proximity domain %d %s\n",
100 p->apic_id,
101 p->proximity_domain,
102 (p->flags & ACPI_SRAT_CPU_ENABLED) ?
103 "enabled" : "disabled"));
104 }
105 #endif /* ACPI_DEBUG_OUTPUT */
106 break;
107 default:
108 printk(KERN_WARNING PREFIX
109 "Found unsupported SRAT entry (type = %#x)\n",
110 header->type);
111 break;
112 }
113 }
114
acpi_parse_slit(struct acpi_table_header * table)115 static int __init acpi_parse_slit(struct acpi_table_header *table)
116 {
117 acpi_numa_slit_init((struct acpi_table_slit *)table);
118
119 return 0;
120 }
121
122 static int __init
acpi_parse_x2apic_affinity(struct acpi_subtable_header * header,const unsigned long end)123 acpi_parse_x2apic_affinity(struct acpi_subtable_header *header,
124 const unsigned long end)
125 {
126 const struct acpi_srat_x2apic_cpu_affinity *processor_affinity
127 = container_of(header, struct acpi_srat_x2apic_cpu_affinity,
128 header);
129
130 if (!header)
131 return -EINVAL;
132
133 acpi_table_print_srat_entry(header);
134
135 /* let architecture-dependent part to do it */
136 acpi_numa_x2apic_affinity_init(processor_affinity);
137
138 return 0;
139 }
140
141 static int __init
acpi_parse_processor_affinity(struct acpi_subtable_header * header,const unsigned long end)142 acpi_parse_processor_affinity(struct acpi_subtable_header *header,
143 const unsigned long end)
144 {
145 const struct acpi_srat_cpu_affinity *processor_affinity
146 = container_of(header, struct acpi_srat_cpu_affinity, header);
147
148 if (!header)
149 return -EINVAL;
150
151 acpi_table_print_srat_entry(header);
152
153 /* let architecture-dependent part to do it */
154 acpi_numa_processor_affinity_init(processor_affinity);
155
156 return 0;
157 }
158
159 static int __init
acpi_parse_memory_affinity(struct acpi_subtable_header * header,const unsigned long end)160 acpi_parse_memory_affinity(struct acpi_subtable_header *header,
161 const unsigned long end)
162 {
163 const struct acpi_srat_mem_affinity *memory_affinity
164 = container_of(header, struct acpi_srat_mem_affinity, header);
165
166 if (!header)
167 return -EINVAL;
168
169 acpi_table_print_srat_entry(header);
170
171 /* let architecture-dependent part to do it */
172 acpi_numa_memory_affinity_init(memory_affinity);
173
174 return 0;
175 }
176
acpi_parse_srat(struct acpi_table_header * table)177 int __init acpi_parse_srat(struct acpi_table_header *table)
178 {
179 if (!table)
180 return -EINVAL;
181
182 srat_rev = table->revision;
183
184 return 0;
185 }
186
187 int __init
acpi_table_parse_srat(int id,acpi_madt_entry_handler handler,unsigned int max_entries)188 acpi_table_parse_srat(int id, acpi_madt_entry_handler handler,
189 unsigned int max_entries)
190 {
191 return acpi_table_parse_entries(ACPI_SIG_SRAT,
192 sizeof(struct acpi_table_srat), id,
193 handler, max_entries);
194 }
195
acpi_numa_init(void)196 int __init acpi_numa_init(void)
197 {
198 /* SRAT: Static Resource Affinity Table */
199 if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) {
200 acpi_table_parse_srat(ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY,
201 acpi_parse_x2apic_affinity, 0);
202 acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY,
203 acpi_parse_processor_affinity, 0);
204 acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY,
205 acpi_parse_memory_affinity,
206 NR_NODE_MEMBLKS);
207 }
208
209 /* SLIT: System Locality Information Table */
210 acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit);
211
212 acpi_numa_arch_fixup();
213 return 0;
214 }
215
216 #if 0
217 int acpi_get_pxm(acpi_handle h)
218 {
219 unsigned long pxm;
220 acpi_status status;
221 acpi_handle handle;
222 acpi_handle phandle = h;
223
224 do {
225 handle = phandle;
226 status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
227 if (ACPI_SUCCESS(status))
228 return (int)pxm;
229 status = acpi_get_parent(handle, &phandle);
230 } while (ACPI_SUCCESS(status));
231 return -1;
232 }
233
234 EXPORT_SYMBOL(acpi_get_pxm);
235 #endif
236