// 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_id_valid(apic_id)) {
pr_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);
pr_debug("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);
pr_debug("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;
}
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