# Common NUMA Features
config NUMA
bool "NUMA Memory Allocation and Scheduler Support"
+ select GENERIC_ARCH_NUMA
select ACPI_NUMA if ACPI
select OF_NUMA
help
#define __ASM_NUMA_H
#include <asm/topology.h>
-
-#ifdef CONFIG_NUMA
-
-#define NR_NODE_MEMBLKS (MAX_NUMNODES * 2)
-
-int __node_distance(int from, int to);
-#define node_distance(a, b) __node_distance(a, b)
-
-extern nodemask_t numa_nodes_parsed __initdata;
-
-extern bool numa_off;
-
-/* Mappings between node number and cpus on that node. */
-extern cpumask_var_t node_to_cpumask_map[MAX_NUMNODES];
-void numa_clear_node(unsigned int cpu);
-
-#ifdef CONFIG_DEBUG_PER_CPU_MAPS
-const struct cpumask *cpumask_of_node(int node);
-#else
-/* Returns a pointer to the cpumask of CPUs on Node 'node'. */
-static inline const struct cpumask *cpumask_of_node(int node)
-{
- if (node == NUMA_NO_NODE)
- return cpu_all_mask;
-
- return node_to_cpumask_map[node];
-}
-#endif
-
-void __init arch_numa_init(void);
-int __init numa_add_memblk(int nodeid, u64 start, u64 end);
-void __init numa_set_distance(int from, int to, int distance);
-void __init numa_free_distance(void);
-void __init early_map_cpu_to_node(unsigned int cpu, int nid);
-void numa_store_cpu_info(unsigned int cpu);
-void numa_add_cpu(unsigned int cpu);
-void numa_remove_cpu(unsigned int cpu);
-
-#else /* CONFIG_NUMA */
-
-static inline void numa_store_cpu_info(unsigned int cpu) { }
-static inline void numa_add_cpu(unsigned int cpu) { }
-static inline void numa_remove_cpu(unsigned int cpu) { }
-static inline void arch_numa_init(void) { }
-static inline void early_map_cpu_to_node(unsigned int cpu, int nid) { }
-
-#endif /* CONFIG_NUMA */
+#include <asm-generic/numa.h>
#endif /* __ASM_NUMA_H */
obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
obj-$(CONFIG_PTDUMP_CORE) += ptdump.o
obj-$(CONFIG_PTDUMP_DEBUGFS) += ptdump_debugfs.o
-obj-$(CONFIG_NUMA) += numa.o
obj-$(CONFIG_DEBUG_VIRTUAL) += physaddr.o
obj-$(CONFIG_ARM64_MTE) += mteswap.o
KASAN_SANITIZE_physaddr.o += n
+++ /dev/null
-// 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 <asm/sections.h>
-
-struct pglist_data *node_data[MAX_NUMNODES] __read_mostly;
-EXPORT_SYMBOL(node_data);
-nodemask_t numa_nodes_parsed __initdata;
-static int cpu_to_node_map[NR_CPUS] = { [0 ... NR_CPUS-1] = NUMA_NO_NODE };
-
-static int numa_distance_cnt;
-static u8 *numa_distance;
-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;
-
- 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
-
-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);
-}
-
-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);
-
-static int __init 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));
-}
-
-static void * __init pcpu_fc_alloc(unsigned int cpu, size_t size,
- size_t align)
-{
- int nid = early_cpu_to_node(cpu);
-
- return memblock_alloc_try_nid(size, align,
- __pa(MAX_DMA_ADDRESS), MEMBLOCK_ALLOC_ACCESSIBLE, nid);
-}
-
-static void __init pcpu_fc_free(void *ptr, size_t size)
-{
- memblock_free_early(__pa(ptr), size);
-}
-
-void __init setup_per_cpu_areas(void)
-{
- unsigned long delta;
- unsigned int cpu;
- int rc;
-
- /*
- * 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,
- pcpu_fc_alloc, pcpu_fc_free);
- if (rc < 0)
- panic("Failed to initialize percpu areas.");
-
- 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
-
-/**
- * numa_add_memblk() - Set node id to memblk
- * @nid: NUMA node ID of the new memblk
- * @start: Start address of the new memblk
- * @end: End address of the new memblk
- *
- * RETURNS:
- * 0 on success, -errno on failure.
- */
-int __init numa_add_memblk(int nid, u64 start, u64 end)
-{
- int ret;
-
- ret = memblock_set_node(start, (end - start), &memblock.memory, nid);
- if (ret < 0) {
- pr_err("memblock [0x%llx - 0x%llx] failed to add on node %d\n",
- start, (end - 1), nid);
- return ret;
- }
-
- node_set(nid, numa_nodes_parsed);
- return ret;
-}
-
-/*
- * Initialize NODE_DATA for a node on the local memory
- */
-static void __init setup_node_data(int nid, u64 start_pfn, u64 end_pfn)
-{
- const size_t nd_size = roundup(sizeof(pg_data_t), SMP_CACHE_BYTES);
- u64 nd_pa;
- void *nd;
- int tnid;
-
- if (start_pfn >= end_pfn)
- pr_info("Initmem setup node %d [<memory-less node>]\n", nid);
-
- nd_pa = memblock_phys_alloc_try_nid(nd_size, SMP_CACHE_BYTES, nid);
- if (!nd_pa)
- panic("Cannot allocate %zu bytes for node %d data\n",
- nd_size, nid);
-
- nd = __va(nd_pa);
-
- /* report and initialize */
- pr_info("NODE_DATA [mem %#010Lx-%#010Lx]\n",
- nd_pa, nd_pa + nd_size - 1);
- tnid = early_pfn_to_nid(nd_pa >> PAGE_SHIFT);
- if (tnid != nid)
- pr_info("NODE_DATA(%d) on node %d\n", nid, tnid);
-
- node_data[nid] = nd;
- memset(NODE_DATA(nid), 0, sizeof(pg_data_t));
- NODE_DATA(nid)->node_id = nid;
- NODE_DATA(nid)->node_start_pfn = start_pfn;
- NODE_DATA(nid)->node_spanned_pages = end_pfn - start_pfn;
-}
-
-/*
- * numa_free_distance
- *
- * The current table is freed.
- */
-void __init numa_free_distance(void)
-{
- size_t size;
-
- if (!numa_distance)
- return;
-
- size = numa_distance_cnt * numa_distance_cnt *
- sizeof(numa_distance[0]);
-
- memblock_free(__pa(numa_distance), size);
- numa_distance_cnt = 0;
- numa_distance = NULL;
-}
-
-/*
- * Create a new NUMA distance table.
- */
-static int __init numa_alloc_distance(void)
-{
- size_t size;
- u64 phys;
- int i, j;
-
- size = nr_node_ids * nr_node_ids * sizeof(numa_distance[0]);
- phys = memblock_find_in_range(0, PFN_PHYS(max_pfn),
- size, PAGE_SIZE);
- if (WARN_ON(!phys))
- return -ENOMEM;
-
- memblock_reserve(phys, size);
-
- numa_distance = __va(phys);
- numa_distance_cnt = nr_node_ids;
-
- /* fill with the default distances */
- for (i = 0; i < numa_distance_cnt; i++)
- for (j = 0; j < numa_distance_cnt; j++)
- numa_distance[i * numa_distance_cnt + j] = i == j ?
- LOCAL_DISTANCE : REMOTE_DISTANCE;
-
- pr_debug("Initialized distance table, cnt=%d\n", numa_distance_cnt);
-
- return 0;
-}
-
-/**
- * numa_set_distance() - Set inter node NUMA distance from node to node.
- * @from: the 'from' node to set distance
- * @to: the 'to' node to set distance
- * @distance: NUMA distance
- *
- * Set the distance from node @from to @to to @distance.
- * If distance table doesn't exist, a warning is printed.
- *
- * If @from or @to is higher than the highest known node or lower than zero
- * or @distance doesn't make sense, the call is ignored.
- */
-void __init numa_set_distance(int from, int to, int distance)
-{
- if (!numa_distance) {
- pr_warn_once("Warning: distance table not allocated yet\n");
- return;
- }
-
- if (from >= numa_distance_cnt || to >= numa_distance_cnt ||
- from < 0 || to < 0) {
- pr_warn_once("Warning: node ids are out of bound, from=%d to=%d distance=%d\n",
- from, to, distance);
- return;
- }
-
- if ((u8)distance != distance ||
- (from == to && distance != LOCAL_DISTANCE)) {
- pr_warn_once("Warning: invalid distance parameter, from=%d to=%d distance=%d\n",
- from, to, distance);
- return;
- }
-
- numa_distance[from * numa_distance_cnt + to] = distance;
-}
-
-/*
- * Return NUMA distance @from to @to
- */
-int __node_distance(int from, int to)
-{
- if (from >= numa_distance_cnt || to >= numa_distance_cnt)
- return from == to ? LOCAL_DISTANCE : REMOTE_DISTANCE;
- return numa_distance[from * numa_distance_cnt + to];
-}
-EXPORT_SYMBOL(__node_distance);
-
-static int __init numa_register_nodes(void)
-{
- int nid;
- struct memblock_region *mblk;
-
- /* Check that valid nid is set to memblks */
- for_each_mem_region(mblk) {
- int mblk_nid = memblock_get_region_node(mblk);
-
- if (mblk_nid == NUMA_NO_NODE || mblk_nid >= MAX_NUMNODES) {
- pr_warn("Warning: invalid memblk node %d [mem %#010Lx-%#010Lx]\n",
- mblk_nid, mblk->base,
- mblk->base + mblk->size - 1);
- 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);
- }
-
- /* Setup online nodes to actual nodes*/
- node_possible_map = numa_nodes_parsed;
-
- return 0;
-}
-
-static int __init numa_init(int (*init_func)(void))
-{
- int ret;
-
- nodes_clear(numa_nodes_parsed);
- nodes_clear(node_possible_map);
- nodes_clear(node_online_map);
-
- ret = numa_alloc_distance();
- if (ret < 0)
- return ret;
-
- ret = init_func();
- 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_free_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();
- int ret;
-
- if (numa_off)
- pr_info("NUMA disabled\n"); /* Forced off on command line. */
- pr_info("Faking a node at [mem %#018Lx-%#018Lx]\n", start, end - 1);
-
- ret = numa_add_memblk(0, start, end);
- 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_info("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);
-}
appropriate scaling, sysfs interface for reading capacity values at
runtime.
+config GENERIC_ARCH_NUMA
+ bool
+ help
+ Enable support for generic NUMA implementation. Currently, RISC-V
+ and ARM64 use it.
+
endmenu
obj-$(CONFIG_DEV_COREDUMP) += devcoredump.o
obj-$(CONFIG_GENERIC_MSI_IRQ_DOMAIN) += platform-msi.o
obj-$(CONFIG_GENERIC_ARCH_TOPOLOGY) += arch_topology.o
+obj-$(CONFIG_GENERIC_ARCH_NUMA) += arch_numa.o
obj-y += test/
--- /dev/null
+// 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 <asm/sections.h>
+
+struct pglist_data *node_data[MAX_NUMNODES] __read_mostly;
+EXPORT_SYMBOL(node_data);
+nodemask_t numa_nodes_parsed __initdata;
+static int cpu_to_node_map[NR_CPUS] = { [0 ... NR_CPUS-1] = NUMA_NO_NODE };
+
+static int numa_distance_cnt;
+static u8 *numa_distance;
+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;
+
+ 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
+
+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);
+}
+
+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);
+
+static int __init 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));
+}
+
+static void * __init pcpu_fc_alloc(unsigned int cpu, size_t size,
+ size_t align)
+{
+ int nid = early_cpu_to_node(cpu);
+
+ return memblock_alloc_try_nid(size, align,
+ __pa(MAX_DMA_ADDRESS), MEMBLOCK_ALLOC_ACCESSIBLE, nid);
+}
+
+static void __init pcpu_fc_free(void *ptr, size_t size)
+{
+ memblock_free_early(__pa(ptr), size);
+}
+
+void __init setup_per_cpu_areas(void)
+{
+ unsigned long delta;
+ unsigned int cpu;
+ int rc;
+
+ /*
+ * 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,
+ pcpu_fc_alloc, pcpu_fc_free);
+ if (rc < 0)
+ panic("Failed to initialize percpu areas.");
+
+ 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
+
+/**
+ * numa_add_memblk() - Set node id to memblk
+ * @nid: NUMA node ID of the new memblk
+ * @start: Start address of the new memblk
+ * @end: End address of the new memblk
+ *
+ * RETURNS:
+ * 0 on success, -errno on failure.
+ */
+int __init numa_add_memblk(int nid, u64 start, u64 end)
+{
+ int ret;
+
+ ret = memblock_set_node(start, (end - start), &memblock.memory, nid);
+ if (ret < 0) {
+ pr_err("memblock [0x%llx - 0x%llx] failed to add on node %d\n",
+ start, (end - 1), nid);
+ return ret;
+ }
+
+ node_set(nid, numa_nodes_parsed);
+ return ret;
+}
+
+/*
+ * Initialize NODE_DATA for a node on the local memory
+ */
+static void __init setup_node_data(int nid, u64 start_pfn, u64 end_pfn)
+{
+ const size_t nd_size = roundup(sizeof(pg_data_t), SMP_CACHE_BYTES);
+ u64 nd_pa;
+ void *nd;
+ int tnid;
+
+ if (start_pfn >= end_pfn)
+ pr_info("Initmem setup node %d [<memory-less node>]\n", nid);
+
+ nd_pa = memblock_phys_alloc_try_nid(nd_size, SMP_CACHE_BYTES, nid);
+ if (!nd_pa)
+ panic("Cannot allocate %zu bytes for node %d data\n",
+ nd_size, nid);
+
+ nd = __va(nd_pa);
+
+ /* report and initialize */
+ pr_info("NODE_DATA [mem %#010Lx-%#010Lx]\n",
+ nd_pa, nd_pa + nd_size - 1);
+ tnid = early_pfn_to_nid(nd_pa >> PAGE_SHIFT);
+ if (tnid != nid)
+ pr_info("NODE_DATA(%d) on node %d\n", nid, tnid);
+
+ node_data[nid] = nd;
+ memset(NODE_DATA(nid), 0, sizeof(pg_data_t));
+ NODE_DATA(nid)->node_id = nid;
+ NODE_DATA(nid)->node_start_pfn = start_pfn;
+ NODE_DATA(nid)->node_spanned_pages = end_pfn - start_pfn;
+}
+
+/*
+ * numa_free_distance
+ *
+ * The current table is freed.
+ */
+void __init numa_free_distance(void)
+{
+ size_t size;
+
+ if (!numa_distance)
+ return;
+
+ size = numa_distance_cnt * numa_distance_cnt *
+ sizeof(numa_distance[0]);
+
+ memblock_free(__pa(numa_distance), size);
+ numa_distance_cnt = 0;
+ numa_distance = NULL;
+}
+
+/*
+ * Create a new NUMA distance table.
+ */
+static int __init numa_alloc_distance(void)
+{
+ size_t size;
+ u64 phys;
+ int i, j;
+
+ size = nr_node_ids * nr_node_ids * sizeof(numa_distance[0]);
+ phys = memblock_find_in_range(0, PFN_PHYS(max_pfn),
+ size, PAGE_SIZE);
+ if (WARN_ON(!phys))
+ return -ENOMEM;
+
+ memblock_reserve(phys, size);
+
+ numa_distance = __va(phys);
+ numa_distance_cnt = nr_node_ids;
+
+ /* fill with the default distances */
+ for (i = 0; i < numa_distance_cnt; i++)
+ for (j = 0; j < numa_distance_cnt; j++)
+ numa_distance[i * numa_distance_cnt + j] = i == j ?
+ LOCAL_DISTANCE : REMOTE_DISTANCE;
+
+ pr_debug("Initialized distance table, cnt=%d\n", numa_distance_cnt);
+
+ return 0;
+}
+
+/**
+ * numa_set_distance() - Set inter node NUMA distance from node to node.
+ * @from: the 'from' node to set distance
+ * @to: the 'to' node to set distance
+ * @distance: NUMA distance
+ *
+ * Set the distance from node @from to @to to @distance.
+ * If distance table doesn't exist, a warning is printed.
+ *
+ * If @from or @to is higher than the highest known node or lower than zero
+ * or @distance doesn't make sense, the call is ignored.
+ */
+void __init numa_set_distance(int from, int to, int distance)
+{
+ if (!numa_distance) {
+ pr_warn_once("Warning: distance table not allocated yet\n");
+ return;
+ }
+
+ if (from >= numa_distance_cnt || to >= numa_distance_cnt ||
+ from < 0 || to < 0) {
+ pr_warn_once("Warning: node ids are out of bound, from=%d to=%d distance=%d\n",
+ from, to, distance);
+ return;
+ }
+
+ if ((u8)distance != distance ||
+ (from == to && distance != LOCAL_DISTANCE)) {
+ pr_warn_once("Warning: invalid distance parameter, from=%d to=%d distance=%d\n",
+ from, to, distance);
+ return;
+ }
+
+ numa_distance[from * numa_distance_cnt + to] = distance;
+}
+
+/*
+ * Return NUMA distance @from to @to
+ */
+int __node_distance(int from, int to)
+{
+ if (from >= numa_distance_cnt || to >= numa_distance_cnt)
+ return from == to ? LOCAL_DISTANCE : REMOTE_DISTANCE;
+ return numa_distance[from * numa_distance_cnt + to];
+}
+EXPORT_SYMBOL(__node_distance);
+
+static int __init numa_register_nodes(void)
+{
+ int nid;
+ struct memblock_region *mblk;
+
+ /* Check that valid nid is set to memblks */
+ for_each_mem_region(mblk) {
+ int mblk_nid = memblock_get_region_node(mblk);
+
+ if (mblk_nid == NUMA_NO_NODE || mblk_nid >= MAX_NUMNODES) {
+ pr_warn("Warning: invalid memblk node %d [mem %#010Lx-%#010Lx]\n",
+ mblk_nid, mblk->base,
+ mblk->base + mblk->size - 1);
+ 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);
+ }
+
+ /* Setup online nodes to actual nodes*/
+ node_possible_map = numa_nodes_parsed;
+
+ return 0;
+}
+
+static int __init numa_init(int (*init_func)(void))
+{
+ int ret;
+
+ nodes_clear(numa_nodes_parsed);
+ nodes_clear(node_possible_map);
+ nodes_clear(node_online_map);
+
+ ret = numa_alloc_distance();
+ if (ret < 0)
+ return ret;
+
+ ret = init_func();
+ 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_free_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();
+ int ret;
+
+ if (numa_off)
+ pr_info("NUMA disabled\n"); /* Forced off on command line. */
+ pr_info("Faking a node at [mem %#018Lx-%#018Lx]\n", start, end - 1);
+
+ ret = numa_add_memblk(0, start, end);
+ 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_info("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);
+}
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_GENERIC_NUMA_H
+#define __ASM_GENERIC_NUMA_H
+
+#ifdef CONFIG_NUMA
+
+#define NR_NODE_MEMBLKS (MAX_NUMNODES * 2)
+
+int __node_distance(int from, int to);
+#define node_distance(a, b) __node_distance(a, b)
+
+extern nodemask_t numa_nodes_parsed __initdata;
+
+extern bool numa_off;
+
+/* Mappings between node number and cpus on that node. */
+extern cpumask_var_t node_to_cpumask_map[MAX_NUMNODES];
+void numa_clear_node(unsigned int cpu);
+
+#ifdef CONFIG_DEBUG_PER_CPU_MAPS
+const struct cpumask *cpumask_of_node(int node);
+#else
+/* Returns a pointer to the cpumask of CPUs on Node 'node'. */
+static inline const struct cpumask *cpumask_of_node(int node)
+{
+ if (node == NUMA_NO_NODE)
+ return cpu_all_mask;
+
+ return node_to_cpumask_map[node];
+}
+#endif
+
+void __init arch_numa_init(void);
+int __init numa_add_memblk(int nodeid, u64 start, u64 end);
+void __init numa_set_distance(int from, int to, int distance);
+void __init numa_free_distance(void);
+void __init early_map_cpu_to_node(unsigned int cpu, int nid);
+void numa_store_cpu_info(unsigned int cpu);
+void numa_add_cpu(unsigned int cpu);
+void numa_remove_cpu(unsigned int cpu);
+
+#else /* CONFIG_NUMA */
+
+static inline void numa_store_cpu_info(unsigned int cpu) { }
+static inline void numa_add_cpu(unsigned int cpu) { }
+static inline void numa_remove_cpu(unsigned int cpu) { }
+static inline void arch_numa_init(void) { }
+static inline void early_map_cpu_to_node(unsigned int cpu, int nid) { }
+
+#endif /* CONFIG_NUMA */
+
+#endif /* __ASM_GENERIC_NUMA_H */
projects / linux-block.git / commitdiff