summaryrefslogtreecommitdiff
path: root/drivers/base
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/Kconfig7
-rw-r--r--drivers/base/Makefile1
-rw-r--r--drivers/base/arch_numa.c371
3 files changed, 0 insertions, 379 deletions
diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig
index 43f20ca95a2a..a9acf4575f4f 100644
--- a/drivers/base/Kconfig
+++ b/drivers/base/Kconfig
@@ -230,13 +230,6 @@ config GENERIC_ARCH_TOPOLOGY
appropriate scaling, sysfs interface for reading capacity values at
runtime.
-config GENERIC_ARCH_NUMA
- bool
- select NUMA_MEMBLKS
- help
- Enable support for generic NUMA implementation. Currently, RISC-V
- and ARM64 use it.
-
config FW_DEVLINK_SYNC_STATE_TIMEOUT
bool "sync_state() behavior defaults to timeout instead of strict"
help
diff --git a/drivers/base/Makefile b/drivers/base/Makefile
index 8074a10183dc..435710f643a5 100644
--- a/drivers/base/Makefile
+++ b/drivers/base/Makefile
@@ -25,7 +25,6 @@ obj-$(CONFIG_PINCTRL) += pinctrl.o
obj-$(CONFIG_DEV_COREDUMP) += devcoredump.o
obj-$(CONFIG_GENERIC_MSI_IRQ) += platform-msi.o
obj-$(CONFIG_GENERIC_ARCH_TOPOLOGY) += arch_topology.o
-obj-$(CONFIG_GENERIC_ARCH_NUMA) += arch_numa.o
obj-$(CONFIG_ACPI) += physical_location.o
obj-y += test/
diff --git a/drivers/base/arch_numa.c b/drivers/base/arch_numa.c
deleted file mode 100644
index 6476227b772c..000000000000
--- a/drivers/base/arch_numa.c
+++ /dev/null
@@ -1,371 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * NUMA support, based on the x86 implementation.
- *
- * Copyright (C) 2015 Cavium Inc.
- * Author: Ganapatrao Kulkarni <gkulkarni@cavium.com>
- */
-
-#define pr_fmt(fmt) "NUMA: " fmt
-
-#include <linux/acpi.h>
-#include <linux/memblock.h>
-#include <linux/module.h>
-#include <linux/of.h>
-#include <linux/numa_memblks.h>
-
-#include <asm/sections.h>
-
-static int cpu_to_node_map[NR_CPUS] = { [0 ... NR_CPUS-1] = NUMA_NO_NODE };
-
-bool numa_off;
-
-static __init int numa_parse_early_param(char *opt)
-{
- if (!opt)
- return -EINVAL;
- if (str_has_prefix(opt, "off"))
- numa_off = true;
- if (!strncmp(opt, "fake=", 5))
- return numa_emu_cmdline(opt + 5);
-
- return 0;
-}
-early_param("numa", numa_parse_early_param);
-
-cpumask_var_t node_to_cpumask_map[MAX_NUMNODES];
-EXPORT_SYMBOL(node_to_cpumask_map);
-
-#ifdef CONFIG_DEBUG_PER_CPU_MAPS
-
-/*
- * Returns a pointer to the bitmask of CPUs on Node 'node'.
- */
-const struct cpumask *cpumask_of_node(int node)
-{
-
- if (node == NUMA_NO_NODE)
- return cpu_all_mask;
-
- if (WARN_ON(node < 0 || node >= nr_node_ids))
- return cpu_none_mask;
-
- if (WARN_ON(node_to_cpumask_map[node] == NULL))
- return cpu_online_mask;
-
- return node_to_cpumask_map[node];
-}
-EXPORT_SYMBOL(cpumask_of_node);
-
-#endif
-
-#ifndef CONFIG_NUMA_EMU
-static void numa_update_cpu(unsigned int cpu, bool remove)
-{
- int nid = cpu_to_node(cpu);
-
- if (nid == NUMA_NO_NODE)
- return;
-
- if (remove)
- cpumask_clear_cpu(cpu, node_to_cpumask_map[nid]);
- else
- cpumask_set_cpu(cpu, node_to_cpumask_map[nid]);
-}
-
-void numa_add_cpu(unsigned int cpu)
-{
- numa_update_cpu(cpu, false);
-}
-
-void numa_remove_cpu(unsigned int cpu)
-{
- numa_update_cpu(cpu, true);
-}
-#endif
-
-void numa_clear_node(unsigned int cpu)
-{
- numa_remove_cpu(cpu);
- set_cpu_numa_node(cpu, NUMA_NO_NODE);
-}
-
-/*
- * Allocate node_to_cpumask_map based on number of available nodes
- * Requires node_possible_map to be valid.
- *
- * Note: cpumask_of_node() is not valid until after this is done.
- * (Use CONFIG_DEBUG_PER_CPU_MAPS to check this.)
- */
-static void __init setup_node_to_cpumask_map(void)
-{
- int node;
-
- /* setup nr_node_ids if not done yet */
- if (nr_node_ids == MAX_NUMNODES)
- setup_nr_node_ids();
-
- /* allocate and clear the mapping */
- for (node = 0; node < nr_node_ids; node++) {
- alloc_bootmem_cpumask_var(&node_to_cpumask_map[node]);
- cpumask_clear(node_to_cpumask_map[node]);
- }
-
- /* cpumask_of_node() will now work */
- pr_debug("Node to cpumask map for %u nodes\n", nr_node_ids);
-}
-
-/*
- * Set the cpu to node and mem mapping
- */
-void numa_store_cpu_info(unsigned int cpu)
-{
- set_cpu_numa_node(cpu, cpu_to_node_map[cpu]);
-}
-
-void __init early_map_cpu_to_node(unsigned int cpu, int nid)
-{
- /* fallback to node 0 */
- if (nid < 0 || nid >= MAX_NUMNODES || numa_off)
- nid = 0;
-
- cpu_to_node_map[cpu] = nid;
-
- /*
- * We should set the numa node of cpu0 as soon as possible, because it
- * has already been set up online before. cpu_to_node(0) will soon be
- * called.
- */
- if (!cpu)
- set_cpu_numa_node(cpu, nid);
-}
-
-#ifdef CONFIG_HAVE_SETUP_PER_CPU_AREA
-unsigned long __per_cpu_offset[NR_CPUS] __read_mostly;
-EXPORT_SYMBOL(__per_cpu_offset);
-
-int early_cpu_to_node(int cpu)
-{
- return cpu_to_node_map[cpu];
-}
-
-static int __init pcpu_cpu_distance(unsigned int from, unsigned int to)
-{
- return node_distance(early_cpu_to_node(from), early_cpu_to_node(to));
-}
-
-void __init setup_per_cpu_areas(void)
-{
- unsigned long delta;
- unsigned int cpu;
- int rc = -EINVAL;
-
- if (pcpu_chosen_fc != PCPU_FC_PAGE) {
- /*
- * Always reserve area for module percpu variables. That's
- * what the legacy allocator did.
- */
- rc = pcpu_embed_first_chunk(PERCPU_MODULE_RESERVE,
- PERCPU_DYNAMIC_RESERVE, PAGE_SIZE,
- pcpu_cpu_distance,
- early_cpu_to_node);
-#ifdef CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK
- if (rc < 0)
- pr_warn("PERCPU: %s allocator failed (%d), falling back to page size\n",
- pcpu_fc_names[pcpu_chosen_fc], rc);
-#endif
- }
-
-#ifdef CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK
- if (rc < 0)
- rc = pcpu_page_first_chunk(PERCPU_MODULE_RESERVE, early_cpu_to_node);
-#endif
- if (rc < 0)
- panic("Failed to initialize percpu areas (err=%d).", rc);
-
- delta = (unsigned long)pcpu_base_addr - (unsigned long)__per_cpu_start;
- for_each_possible_cpu(cpu)
- __per_cpu_offset[cpu] = delta + pcpu_unit_offsets[cpu];
-}
-#endif
-
-/*
- * Initialize NODE_DATA for a node on the local memory
- */
-static void __init setup_node_data(int nid, u64 start_pfn, u64 end_pfn)
-{
- if (start_pfn >= end_pfn)
- pr_info("Initmem setup node %d [<memory-less node>]\n", nid);
-
- alloc_node_data(nid);
-
- NODE_DATA(nid)->node_id = nid;
- NODE_DATA(nid)->node_start_pfn = start_pfn;
- NODE_DATA(nid)->node_spanned_pages = end_pfn - start_pfn;
-}
-
-static int __init numa_register_nodes(void)
-{
- int nid;
-
- /* Check the validity of the memblock/node mapping */
- if (!memblock_validate_numa_coverage(0))
- return -EINVAL;
-
- /* Finally register nodes. */
- for_each_node_mask(nid, numa_nodes_parsed) {
- unsigned long start_pfn, end_pfn;
-
- get_pfn_range_for_nid(nid, &start_pfn, &end_pfn);
- setup_node_data(nid, start_pfn, end_pfn);
- node_set_online(nid);
- }
-
- return 0;
-}
-
-static int __init numa_init(int (*init_func)(void))
-{
- int ret;
-
- ret = numa_memblks_init(init_func, /* memblock_force_top_down */ false);
- if (ret < 0)
- goto out_free_distance;
-
- if (nodes_empty(numa_nodes_parsed)) {
- pr_info("No NUMA configuration found\n");
- ret = -EINVAL;
- goto out_free_distance;
- }
-
- ret = numa_register_nodes();
- if (ret < 0)
- goto out_free_distance;
-
- setup_node_to_cpumask_map();
-
- return 0;
-out_free_distance:
- numa_reset_distance();
- return ret;
-}
-
-/**
- * dummy_numa_init() - Fallback dummy NUMA init
- *
- * Used if there's no underlying NUMA architecture, NUMA initialization
- * fails, or NUMA is disabled on the command line.
- *
- * Must online at least one node (node 0) and add memory blocks that cover all
- * allowed memory. It is unlikely that this function fails.
- *
- * Return: 0 on success, -errno on failure.
- */
-static int __init dummy_numa_init(void)
-{
- phys_addr_t start = memblock_start_of_DRAM();
- phys_addr_t end = memblock_end_of_DRAM() - 1;
- int ret;
-
- if (numa_off)
- pr_info("NUMA disabled\n"); /* Forced off on command line. */
- pr_info("Faking a node at [mem %pap-%pap]\n", &start, &end);
-
- ret = numa_add_memblk(0, start, end + 1);
- if (ret) {
- pr_err("NUMA init failed\n");
- return ret;
- }
-
- numa_off = true;
- return 0;
-}
-
-#ifdef CONFIG_ACPI_NUMA
-static int __init arch_acpi_numa_init(void)
-{
- int ret;
-
- ret = acpi_numa_init();
- if (ret) {
- pr_debug("Failed to initialise from firmware\n");
- return ret;
- }
-
- return srat_disabled() ? -EINVAL : 0;
-}
-#else
-static int __init arch_acpi_numa_init(void)
-{
- return -EOPNOTSUPP;
-}
-#endif
-
-/**
- * arch_numa_init() - Initialize NUMA
- *
- * Try each configured NUMA initialization method until one succeeds. The
- * last fallback is dummy single node config encompassing whole memory.
- */
-void __init arch_numa_init(void)
-{
- if (!numa_off) {
- if (!acpi_disabled && !numa_init(arch_acpi_numa_init))
- return;
- if (acpi_disabled && !numa_init(of_numa_init))
- return;
- }
-
- numa_init(dummy_numa_init);
-}
-
-#ifdef CONFIG_NUMA_EMU
-void __init numa_emu_update_cpu_to_node(int *emu_nid_to_phys,
- unsigned int nr_emu_nids)
-{
- int i, j;
-
- /*
- * Transform cpu_to_node_map table to use emulated nids by
- * reverse-mapping phys_nid. The maps should always exist but fall
- * back to zero just in case.
- */
- for (i = 0; i < ARRAY_SIZE(cpu_to_node_map); i++) {
- if (cpu_to_node_map[i] == NUMA_NO_NODE)
- continue;
- for (j = 0; j < nr_emu_nids; j++)
- if (cpu_to_node_map[i] == emu_nid_to_phys[j])
- break;
- cpu_to_node_map[i] = j < nr_emu_nids ? j : 0;
- }
-}
-
-u64 __init numa_emu_dma_end(void)
-{
- return memblock_start_of_DRAM() + SZ_4G;
-}
-
-void debug_cpumask_set_cpu(unsigned int cpu, int node, bool enable)
-{
- struct cpumask *mask;
-
- if (node == NUMA_NO_NODE)
- return;
-
- mask = node_to_cpumask_map[node];
- if (!cpumask_available(mask)) {
- pr_err("node_to_cpumask_map[%i] NULL\n", node);
- dump_stack();
- return;
- }
-
- if (enable)
- cpumask_set_cpu(cpu, mask);
- else
- cpumask_clear_cpu(cpu, mask);
-
- pr_debug("%s cpu %d node %d: mask now %*pbl\n",
- enable ? "numa_add_cpu" : "numa_remove_cpu",
- cpu, node, cpumask_pr_args(mask));
-}
-#endif /* CONFIG_NUMA_EMU */
generated by cgit (git 2.54.0.dirty) at 2026-09-20 15:00:53 +0000