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