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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * ACPI 3.0 based NUMA setup
4 * Copyright 2004 Andi Kleen, SuSE Labs.
5 *
6 * Reads the ACPI SRAT table to figure out what memory belongs to which CPUs.
7 *
8 * Called from acpi_numa_init while reading the SRAT and SLIT tables.
9 * Assumes all memory regions belonging to a single proximity domain
10 * are in one chunk. Holes between them will be included in the node.
11 */
12
13#include <linux/kernel.h>
14#include <linux/acpi.h>
15#include <linux/mmzone.h>
16#include <linux/bitmap.h>
17#include <linux/init.h>
18#include <linux/topology.h>
19#include <linux/mm.h>
20#include <asm/proto.h>
21#include <asm/numa.h>
22#include <asm/e820/api.h>
23#include <asm/apic.h>
24#include <asm/uv/uv.h>
25
26/* Callback for Proximity Domain -> x2APIC mapping */
27void __init
28acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa)
29{
30 int pxm, node;
31 int apic_id;
32
33 if (srat_disabled())
34 return;
35 if (pa->header.length < sizeof(struct acpi_srat_x2apic_cpu_affinity)) {
36 bad_srat();
37 return;
38 }
39 if ((pa->flags & ACPI_SRAT_CPU_ENABLED) == 0)
40 return;
41 pxm = pa->proximity_domain;
42 apic_id = pa->apic_id;
43 if (!apic->apic_id_valid(apic_id)) {
44 printk(KERN_INFO "SRAT: PXM %u -> X2APIC 0x%04x ignored\n",
45 pxm, apic_id);
46 return;
47 }
48 node = acpi_map_pxm_to_node(pxm);
49 if (node < 0) {
50 printk(KERN_ERR "SRAT: Too many proximity domains %x\n", pxm);
51 bad_srat();
52 return;
53 }
54
55 if (apic_id >= MAX_LOCAL_APIC) {
56 printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u skipped apicid that is too big\n", pxm, apic_id, node);
57 return;
58 }
59 set_apicid_to_node(apic_id, node);
60 node_set(node, numa_nodes_parsed);
61 printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u\n",
62 pxm, apic_id, node);
63}
64
65/* Callback for Proximity Domain -> LAPIC mapping */
66void __init
67acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
68{
69 int pxm, node;
70 int apic_id;
71
72 if (srat_disabled())
73 return;
74 if (pa->header.length != sizeof(struct acpi_srat_cpu_affinity)) {
75 bad_srat();
76 return;
77 }
78 if ((pa->flags & ACPI_SRAT_CPU_ENABLED) == 0)
79 return;
80 pxm = pa->proximity_domain_lo;
81 if (acpi_srat_revision >= 2)
82 pxm |= *((unsigned int*)pa->proximity_domain_hi) << 8;
83 node = acpi_map_pxm_to_node(pxm);
84 if (node < 0) {
85 printk(KERN_ERR "SRAT: Too many proximity domains %x\n", pxm);
86 bad_srat();
87 return;
88 }
89
90 if (get_uv_system_type() >= UV_X2APIC)
91 apic_id = (pa->apic_id << 8) | pa->local_sapic_eid;
92 else
93 apic_id = pa->apic_id;
94
95 if (apic_id >= MAX_LOCAL_APIC) {
96 printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%02x -> Node %u skipped apicid that is too big\n", pxm, apic_id, node);
97 return;
98 }
99
100 set_apicid_to_node(apic_id, node);
101 node_set(node, numa_nodes_parsed);
102 printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%02x -> Node %u\n",
103 pxm, apic_id, node);
104}
105
106int __init x86_acpi_numa_init(void)
107{
108 int ret;
109
110 ret = acpi_numa_init();
111 if (ret < 0)
112 return ret;
113 return srat_disabled() ? -EINVAL : 0;
114}
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
27int acpi_numa __initdata;
28
29static __init int setup_node(int pxm)
30{
31 return acpi_map_pxm_to_node(pxm);
32}
33
34static __init void bad_srat(void)
35{
36 printk(KERN_ERR "SRAT: SRAT not used.\n");
37 acpi_numa = -1;
38}
39
40static __init inline int srat_disabled(void)
41{
42 return acpi_numa < 0;
43}
44
45/* Callback for SLIT parsing */
46void __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 */
57void __init
58acpi_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 node = setup_node(pxm);
73 if (node < 0) {
74 printk(KERN_ERR "SRAT: Too many proximity domains %x\n", pxm);
75 bad_srat();
76 return;
77 }
78
79 apic_id = pa->apic_id;
80 if (apic_id >= MAX_LOCAL_APIC) {
81 printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u skipped apicid that is too big\n", pxm, apic_id, node);
82 return;
83 }
84 set_apicid_to_node(apic_id, node);
85 node_set(node, numa_nodes_parsed);
86 acpi_numa = 1;
87 printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u\n",
88 pxm, apic_id, node);
89}
90
91/* Callback for Proximity Domain -> LAPIC mapping */
92void __init
93acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
94{
95 int pxm, node;
96 int apic_id;
97
98 if (srat_disabled())
99 return;
100 if (pa->header.length != sizeof(struct acpi_srat_cpu_affinity)) {
101 bad_srat();
102 return;
103 }
104 if ((pa->flags & ACPI_SRAT_CPU_ENABLED) == 0)
105 return;
106 pxm = pa->proximity_domain_lo;
107 node = setup_node(pxm);
108 if (node < 0) {
109 printk(KERN_ERR "SRAT: Too many proximity domains %x\n", pxm);
110 bad_srat();
111 return;
112 }
113
114 if (get_uv_system_type() >= UV_X2APIC)
115 apic_id = (pa->apic_id << 8) | pa->local_sapic_eid;
116 else
117 apic_id = pa->apic_id;
118
119 if (apic_id >= MAX_LOCAL_APIC) {
120 printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%02x -> Node %u skipped apicid that is too big\n", pxm, apic_id, node);
121 return;
122 }
123
124 set_apicid_to_node(apic_id, node);
125 node_set(node, numa_nodes_parsed);
126 acpi_numa = 1;
127 printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%02x -> Node %u\n",
128 pxm, apic_id, node);
129}
130
131#ifdef CONFIG_MEMORY_HOTPLUG
132static inline int save_add_info(void) {return 1;}
133#else
134static inline int save_add_info(void) {return 0;}
135#endif
136
137/* Callback for parsing of the Proximity Domain <-> Memory Area mappings */
138void __init
139acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
140{
141 u64 start, end;
142 int node, pxm;
143
144 if (srat_disabled())
145 return;
146 if (ma->header.length != sizeof(struct acpi_srat_mem_affinity)) {
147 bad_srat();
148 return;
149 }
150 if ((ma->flags & ACPI_SRAT_MEM_ENABLED) == 0)
151 return;
152
153 if ((ma->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE) && !save_add_info())
154 return;
155 start = ma->base_address;
156 end = start + ma->length;
157 pxm = ma->proximity_domain;
158 node = setup_node(pxm);
159 if (node < 0) {
160 printk(KERN_ERR "SRAT: Too many proximity domains.\n");
161 bad_srat();
162 return;
163 }
164
165 if (numa_add_memblk(node, start, end) < 0) {
166 bad_srat();
167 return;
168 }
169
170 printk(KERN_INFO "SRAT: Node %u PXM %u %Lx-%Lx\n", node, pxm,
171 start, end);
172}
173
174void __init acpi_numa_arch_fixup(void) {}
175
176int __init x86_acpi_numa_init(void)
177{
178 int ret;
179
180 ret = acpi_numa_init();
181 if (ret < 0)
182 return ret;
183 return srat_disabled() ? -EINVAL : 0;
184}