162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0 262306a36Sopenharmony_ci/* 362306a36Sopenharmony_ci * ACPI 3.0 based NUMA setup 462306a36Sopenharmony_ci * Copyright 2004 Andi Kleen, SuSE Labs. 562306a36Sopenharmony_ci * 662306a36Sopenharmony_ci * Reads the ACPI SRAT table to figure out what memory belongs to which CPUs. 762306a36Sopenharmony_ci * 862306a36Sopenharmony_ci * Called from acpi_numa_init while reading the SRAT and SLIT tables. 962306a36Sopenharmony_ci * Assumes all memory regions belonging to a single proximity domain 1062306a36Sopenharmony_ci * are in one chunk. Holes between them will be included in the node. 1162306a36Sopenharmony_ci */ 1262306a36Sopenharmony_ci 1362306a36Sopenharmony_ci#include <linux/kernel.h> 1462306a36Sopenharmony_ci#include <linux/acpi.h> 1562306a36Sopenharmony_ci#include <linux/mmzone.h> 1662306a36Sopenharmony_ci#include <linux/bitmap.h> 1762306a36Sopenharmony_ci#include <linux/init.h> 1862306a36Sopenharmony_ci#include <linux/topology.h> 1962306a36Sopenharmony_ci#include <linux/mm.h> 2062306a36Sopenharmony_ci#include <asm/proto.h> 2162306a36Sopenharmony_ci#include <asm/numa.h> 2262306a36Sopenharmony_ci#include <asm/e820/api.h> 2362306a36Sopenharmony_ci#include <asm/apic.h> 2462306a36Sopenharmony_ci#include <asm/uv/uv.h> 2562306a36Sopenharmony_ci 2662306a36Sopenharmony_ci/* Callback for Proximity Domain -> x2APIC mapping */ 2762306a36Sopenharmony_civoid __init 2862306a36Sopenharmony_ciacpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa) 2962306a36Sopenharmony_ci{ 3062306a36Sopenharmony_ci int pxm, node; 3162306a36Sopenharmony_ci int apic_id; 3262306a36Sopenharmony_ci 3362306a36Sopenharmony_ci if (srat_disabled()) 3462306a36Sopenharmony_ci return; 3562306a36Sopenharmony_ci if (pa->header.length < sizeof(struct acpi_srat_x2apic_cpu_affinity)) { 3662306a36Sopenharmony_ci bad_srat(); 3762306a36Sopenharmony_ci return; 3862306a36Sopenharmony_ci } 3962306a36Sopenharmony_ci if ((pa->flags & ACPI_SRAT_CPU_ENABLED) == 0) 4062306a36Sopenharmony_ci return; 4162306a36Sopenharmony_ci pxm = pa->proximity_domain; 4262306a36Sopenharmony_ci apic_id = pa->apic_id; 4362306a36Sopenharmony_ci if (!apic_id_valid(apic_id)) { 4462306a36Sopenharmony_ci pr_info("SRAT: PXM %u -> X2APIC 0x%04x ignored\n", pxm, apic_id); 4562306a36Sopenharmony_ci return; 4662306a36Sopenharmony_ci } 4762306a36Sopenharmony_ci node = acpi_map_pxm_to_node(pxm); 4862306a36Sopenharmony_ci if (node < 0) { 4962306a36Sopenharmony_ci printk(KERN_ERR "SRAT: Too many proximity domains %x\n", pxm); 5062306a36Sopenharmony_ci bad_srat(); 5162306a36Sopenharmony_ci return; 5262306a36Sopenharmony_ci } 5362306a36Sopenharmony_ci 5462306a36Sopenharmony_ci if (apic_id >= MAX_LOCAL_APIC) { 5562306a36Sopenharmony_ci printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u skipped apicid that is too big\n", pxm, apic_id, node); 5662306a36Sopenharmony_ci return; 5762306a36Sopenharmony_ci } 5862306a36Sopenharmony_ci set_apicid_to_node(apic_id, node); 5962306a36Sopenharmony_ci node_set(node, numa_nodes_parsed); 6062306a36Sopenharmony_ci printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u\n", 6162306a36Sopenharmony_ci pxm, apic_id, node); 6262306a36Sopenharmony_ci} 6362306a36Sopenharmony_ci 6462306a36Sopenharmony_ci/* Callback for Proximity Domain -> LAPIC mapping */ 6562306a36Sopenharmony_civoid __init 6662306a36Sopenharmony_ciacpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa) 6762306a36Sopenharmony_ci{ 6862306a36Sopenharmony_ci int pxm, node; 6962306a36Sopenharmony_ci int apic_id; 7062306a36Sopenharmony_ci 7162306a36Sopenharmony_ci if (srat_disabled()) 7262306a36Sopenharmony_ci return; 7362306a36Sopenharmony_ci if (pa->header.length != sizeof(struct acpi_srat_cpu_affinity)) { 7462306a36Sopenharmony_ci bad_srat(); 7562306a36Sopenharmony_ci return; 7662306a36Sopenharmony_ci } 7762306a36Sopenharmony_ci if ((pa->flags & ACPI_SRAT_CPU_ENABLED) == 0) 7862306a36Sopenharmony_ci return; 7962306a36Sopenharmony_ci pxm = pa->proximity_domain_lo; 8062306a36Sopenharmony_ci if (acpi_srat_revision >= 2) 8162306a36Sopenharmony_ci pxm |= *((unsigned int*)pa->proximity_domain_hi) << 8; 8262306a36Sopenharmony_ci node = acpi_map_pxm_to_node(pxm); 8362306a36Sopenharmony_ci if (node < 0) { 8462306a36Sopenharmony_ci printk(KERN_ERR "SRAT: Too many proximity domains %x\n", pxm); 8562306a36Sopenharmony_ci bad_srat(); 8662306a36Sopenharmony_ci return; 8762306a36Sopenharmony_ci } 8862306a36Sopenharmony_ci 8962306a36Sopenharmony_ci if (get_uv_system_type() >= UV_X2APIC) 9062306a36Sopenharmony_ci apic_id = (pa->apic_id << 8) | pa->local_sapic_eid; 9162306a36Sopenharmony_ci else 9262306a36Sopenharmony_ci apic_id = pa->apic_id; 9362306a36Sopenharmony_ci 9462306a36Sopenharmony_ci if (apic_id >= MAX_LOCAL_APIC) { 9562306a36Sopenharmony_ci printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%02x -> Node %u skipped apicid that is too big\n", pxm, apic_id, node); 9662306a36Sopenharmony_ci return; 9762306a36Sopenharmony_ci } 9862306a36Sopenharmony_ci 9962306a36Sopenharmony_ci set_apicid_to_node(apic_id, node); 10062306a36Sopenharmony_ci node_set(node, numa_nodes_parsed); 10162306a36Sopenharmony_ci printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%02x -> Node %u\n", 10262306a36Sopenharmony_ci pxm, apic_id, node); 10362306a36Sopenharmony_ci} 10462306a36Sopenharmony_ci 10562306a36Sopenharmony_ciint __init x86_acpi_numa_init(void) 10662306a36Sopenharmony_ci{ 10762306a36Sopenharmony_ci int ret; 10862306a36Sopenharmony_ci 10962306a36Sopenharmony_ci ret = acpi_numa_init(); 11062306a36Sopenharmony_ci if (ret < 0) 11162306a36Sopenharmony_ci return ret; 11262306a36Sopenharmony_ci return srat_disabled() ? -EINVAL : 0; 11362306a36Sopenharmony_ci} 114