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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
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> | |
4b599fed | 17 | #include <linux/init.h> |
1da177e4 | 18 | #include <linux/topology.h> |
68a3a7fe | 19 | #include <linux/mm.h> |
1da177e4 LT |
20 | #include <asm/proto.h> |
21 | #include <asm/numa.h> | |
66441bd3 | 22 | #include <asm/e820/api.h> |
7b6aa335 | 23 | #include <asm/apic.h> |
4ec71fa2 | 24 | #include <asm/uv/uv.h> |
1da177e4 | 25 | |
7237d3de SS |
26 | /* Callback for Proximity Domain -> x2APIC mapping */ |
27 | void __init | |
28 | acpi_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; | |
a35fd282 | 42 | apic_id = pa->apic_id; |
b7157acf | 43 | if (!apic->apic_id_valid(apic_id)) { |
a35fd282 YL |
44 | printk(KERN_INFO "SRAT: PXM %u -> X2APIC 0x%04x ignored\n", |
45 | pxm, apic_id); | |
46 | return; | |
47 | } | |
2faeff1d | 48 | node = acpi_map_pxm_to_node(pxm); |
7237d3de SS |
49 | if (node < 0) { |
50 | printk(KERN_ERR "SRAT: Too many proximity domains %x\n", pxm); | |
51 | bad_srat(); | |
52 | return; | |
53 | } | |
54 | ||
d3bd0588 YL |
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 | } | |
bbc9e2f4 | 59 | set_apicid_to_node(apic_id, node); |
92d4a437 | 60 | node_set(node, numa_nodes_parsed); |
163d3866 | 61 | printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u\n", |
7237d3de SS |
62 | pxm, apic_id, node); |
63 | } | |
64 | ||
1da177e4 LT |
65 | /* Callback for Proximity Domain -> LAPIC mapping */ |
66 | void __init | |
15a58ed1 | 67 | acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa) |
1da177e4 LT |
68 | { |
69 | int pxm, node; | |
ef97001f | 70 | int apic_id; |
71 | ||
d22fe808 AK |
72 | if (srat_disabled()) |
73 | return; | |
15a58ed1 | 74 | if (pa->header.length != sizeof(struct acpi_srat_cpu_affinity)) { |
fad7906d | 75 | bad_srat(); |
d22fe808 AK |
76 | return; |
77 | } | |
15a58ed1 | 78 | if ((pa->flags & ACPI_SRAT_CPU_ENABLED) == 0) |
1da177e4 | 79 | return; |
15a58ed1 | 80 | pxm = pa->proximity_domain_lo; |
cd298f60 KG |
81 | if (acpi_srat_revision >= 2) |
82 | pxm |= *((unsigned int*)pa->proximity_domain_hi) << 8; | |
2faeff1d | 83 | node = acpi_map_pxm_to_node(pxm); |
1da177e4 LT |
84 | if (node < 0) { |
85 | printk(KERN_ERR "SRAT: Too many proximity domains %x\n", pxm); | |
86 | bad_srat(); | |
87 | return; | |
88 | } | |
beafe91f | 89 | |
2e42060c | 90 | if (get_uv_system_type() >= UV_X2APIC) |
a65d1d64 JS |
91 | apic_id = (pa->apic_id << 8) | pa->local_sapic_eid; |
92 | else | |
93 | apic_id = pa->apic_id; | |
d3bd0588 YL |
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 | ||
bbc9e2f4 | 100 | set_apicid_to_node(apic_id, node); |
92d4a437 | 101 | node_set(node, numa_nodes_parsed); |
163d3866 | 102 | printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%02x -> Node %u\n", |
ef97001f | 103 | pxm, apic_id, node); |
1da177e4 LT |
104 | } |
105 | ||
a9aec56a TH |
106 | int __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 | } |