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114 lines
2.9 KiB
114 lines
2.9 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* ACPI 3.0 based NUMA setup |
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* Copyright 2004 Andi Kleen, SuSE Labs. |
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* |
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* Reads the ACPI SRAT table to figure out what memory belongs to which CPUs. |
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* |
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* Called from acpi_numa_init while reading the SRAT and SLIT tables. |
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* Assumes all memory regions belonging to a single proximity domain |
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* are in one chunk. Holes between them will be included in the node. |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/acpi.h> |
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#include <linux/mmzone.h> |
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#include <linux/bitmap.h> |
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#include <linux/init.h> |
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#include <linux/topology.h> |
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#include <linux/mm.h> |
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#include <asm/proto.h> |
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#include <asm/numa.h> |
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#include <asm/e820/api.h> |
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#include <asm/apic.h> |
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#include <asm/uv/uv.h> |
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/* Callback for Proximity Domain -> x2APIC mapping */ |
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void __init |
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acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa) |
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{ |
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int pxm, node; |
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int apic_id; |
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if (srat_disabled()) |
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return; |
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if (pa->header.length < sizeof(struct acpi_srat_x2apic_cpu_affinity)) { |
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bad_srat(); |
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return; |
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} |
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if ((pa->flags & ACPI_SRAT_CPU_ENABLED) == 0) |
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return; |
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pxm = pa->proximity_domain; |
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apic_id = pa->apic_id; |
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if (!apic->apic_id_valid(apic_id)) { |
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printk(KERN_INFO "SRAT: PXM %u -> X2APIC 0x%04x ignored\n", |
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pxm, apic_id); |
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return; |
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} |
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node = acpi_map_pxm_to_node(pxm); |
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if (node < 0) { |
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printk(KERN_ERR "SRAT: Too many proximity domains %x\n", pxm); |
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bad_srat(); |
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return; |
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} |
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if (apic_id >= MAX_LOCAL_APIC) { |
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printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u skipped apicid that is too big\n", pxm, apic_id, node); |
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return; |
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} |
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set_apicid_to_node(apic_id, node); |
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node_set(node, numa_nodes_parsed); |
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printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u\n", |
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pxm, apic_id, node); |
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} |
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/* Callback for Proximity Domain -> LAPIC mapping */ |
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void __init |
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acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa) |
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{ |
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int pxm, node; |
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int apic_id; |
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if (srat_disabled()) |
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return; |
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if (pa->header.length != sizeof(struct acpi_srat_cpu_affinity)) { |
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bad_srat(); |
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return; |
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} |
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if ((pa->flags & ACPI_SRAT_CPU_ENABLED) == 0) |
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return; |
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pxm = pa->proximity_domain_lo; |
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if (acpi_srat_revision >= 2) |
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pxm |= *((unsigned int*)pa->proximity_domain_hi) << 8; |
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node = acpi_map_pxm_to_node(pxm); |
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if (node < 0) { |
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printk(KERN_ERR "SRAT: Too many proximity domains %x\n", pxm); |
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bad_srat(); |
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return; |
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} |
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if (get_uv_system_type() >= UV_X2APIC) |
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apic_id = (pa->apic_id << 8) | pa->local_sapic_eid; |
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else |
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apic_id = pa->apic_id; |
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if (apic_id >= MAX_LOCAL_APIC) { |
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printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%02x -> Node %u skipped apicid that is too big\n", pxm, apic_id, node); |
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return; |
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} |
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set_apicid_to_node(apic_id, node); |
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node_set(node, numa_nodes_parsed); |
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printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%02x -> Node %u\n", |
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pxm, apic_id, node); |
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} |
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int __init x86_acpi_numa_init(void) |
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{ |
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int ret; |
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ret = acpi_numa_init(); |
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if (ret < 0) |
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return ret; |
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return srat_disabled() ? -EINVAL : 0; |
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}
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