// SPDX-License-Identifier: GPL-2.0
/*
* ACPI 5 . 1 based NUMA setup for ARM64
* Lots of code was borrowed from arch / x86 / mm / srat . c
*
* Copyright 2004 Andi Kleen , SuSE Labs .
* Copyright ( C ) 2013 - 2016 , Linaro Ltd .
* Author : Hanjun Guo < hanjun . guo @ linaro . org >
*
* 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 .
*/
#define pr_fmt(fmt) "ACPI: NUMA: " fmt
#include <linux/acpi.h>
#include <linux/bitmap.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/memblock.h>
#include <linux/mmzone.h>
#include <linux/module.h>
#include <linux/topology.h>
#include <asm /numa.h>
static int acpi_early_node_map[NR_CPUS] __initdata = { [0 ... NR_CPUS - 1 ] = NUMA_NO_NODE };
int __init acpi_numa_get_nid(unsigned int cpu)
{
return acpi_early_node_map[cpu];
}
static int __init acpi_parse_gicc_pxm(union acpi_subtable_headers *header,
const unsigned long end)
{
struct acpi_srat_gicc_affinity *pa;
int cpu, pxm, node;
if (srat_disabled())
return -EINVAL;
pa = (struct acpi_srat_gicc_affinity *)header;
if (!pa)
return -EINVAL;
if (!(pa->flags & ACPI_SRAT_GICC_ENABLED))
return 0 ;
pxm = pa->proximity_domain;
node = pxm_to_node(pxm);
/*
* If we can ' t map the UID to a logical cpu this
* means that the UID is not part of possible cpus
* so we do not need a NUMA mapping for it , skip
* the SRAT entry and keep parsing .
*/
cpu = get_cpu_for_acpi_id(pa->acpi_processor_uid);
if (cpu < 0 )
return 0 ;
acpi_early_node_map[cpu] = node;
pr_info("SRAT: PXM %d -> MPIDR 0x%llx -> Node %d\n" , pxm,
cpu_logical_map(cpu), node);
return 0 ;
}
void __init acpi_map_cpus_to_nodes(void )
{
acpi_table_parse_entries(ACPI_SIG_SRAT, sizeof (struct acpi_table_srat),
ACPI_SRAT_TYPE_GICC_AFFINITY,
acpi_parse_gicc_pxm, 0 );
}
/* Callback for Proximity Domain -> ACPI processor UID mapping */
void __init acpi_numa_gicc_affinity_init(struct acpi_srat_gicc_affinity *pa)
{
int pxm, node;
if (srat_disabled())
return ;
if (pa->header.length < sizeof (struct acpi_srat_gicc_affinity)) {
pr_err("SRAT: Invalid SRAT header length: %d\n" ,
pa->header.length);
bad_srat();
return ;
}
if (!(pa->flags & ACPI_SRAT_GICC_ENABLED))
return ;
pxm = pa->proximity_domain;
node = acpi_map_pxm_to_node(pxm);
if (node == NUMA_NO_NODE) {
pr_err("SRAT: Too many proximity domains %d\n" , pxm);
bad_srat();
return ;
}
node_set(node, numa_nodes_parsed);
}
Messung V0.5 in Prozent C=97 H=96 G=96
¤ Dauer der Verarbeitung: 0.10 Sekunden
(vorverarbeitet am 2026-09-28)
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