134 lines
3 KiB
C
134 lines
3 KiB
C
|
// 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/bootmem.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 = { NUMA_NO_NODE };
|
||
|
|
|
||
|
|
int __init acpi_numa_get_nid(unsigned int cpu)
|
||
|
|
{
|
||
|
|
return acpi_early_node_map[cpu];
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int get_cpu_for_acpi_id(u32 uid)
|
||
|
|
{
|
||
|
|
int cpu;
|
||
|
|
|
||
|
|
for (cpu = 0; cpu < nr_cpu_ids; cpu++)
|
||
|
|
if (uid == get_acpi_id_for_cpu(cpu))
|
||
|
|
return cpu;
|
||
|
|
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int __init acpi_parse_gicc_pxm(struct acpi_subtable_header *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 || node >= MAX_NUMNODES) {
|
||
|
|
pr_err("SRAT: Too many proximity domains %d\n", pxm);
|
||
|
|
bad_srat();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
node_set(node, numa_nodes_parsed);
|
||
|
|
}
|
||
|
|
|
||
|
|
int __init arm64_acpi_numa_init(void)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
ret = acpi_numa_init();
|
||
|
|
if (ret) {
|
||
|
|
pr_info("Failed to initialise from firmware\n");
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
return srat_disabled() ? -EINVAL : 0;
|
||
|
|
}
|