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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// 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}