summaryrefslogtreecommitdiffstats
path: root/arch/x86/kernel/setup_percpu.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/kernel/setup_percpu.c')
-rw-r--r--arch/x86/kernel/setup_percpu.c237
1 files changed, 5 insertions, 232 deletions
diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c
index d0b1476490a7..cb6d622520be 100644
--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -51,32 +51,6 @@ DEFINE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid, BAD_APICID);
EXPORT_EARLY_PER_CPU_SYMBOL(x86_cpu_to_apicid);
EXPORT_EARLY_PER_CPU_SYMBOL(x86_bios_cpu_apicid);
-#if defined(CONFIG_NUMA) && defined(CONFIG_X86_64)
-#define X86_64_NUMA 1 /* (used later) */
-DEFINE_PER_CPU(int, node_number) = 0;
-EXPORT_PER_CPU_SYMBOL(node_number);
-
-/*
- * Map cpu index to node index
- */
-DEFINE_EARLY_PER_CPU(int, x86_cpu_to_node_map, NUMA_NO_NODE);
-EXPORT_EARLY_PER_CPU_SYMBOL(x86_cpu_to_node_map);
-
-/*
- * Which logical CPUs are on which nodes
- */
-cpumask_t *node_to_cpumask_map;
-EXPORT_SYMBOL(node_to_cpumask_map);
-
-/*
- * Setup node_to_cpumask_map
- */
-static void __init setup_node_to_cpumask_map(void);
-
-#else
-static inline void setup_node_to_cpumask_map(void) { }
-#endif
-
#ifdef CONFIG_X86_64
/* correctly size the local cpu masks */
@@ -163,13 +137,13 @@ void __init setup_per_cpu_areas(void)
early_per_cpu_map(x86_cpu_to_apicid, cpu);
per_cpu(x86_bios_cpu_apicid, cpu) =
early_per_cpu_map(x86_bios_cpu_apicid, cpu);
-#ifdef X86_64_NUMA
- per_cpu(x86_cpu_to_node_map, cpu) =
- early_per_cpu_map(x86_cpu_to_node_map, cpu);
-#endif
#ifdef CONFIG_X86_64
per_cpu(irq_stack_ptr, cpu) =
per_cpu(irq_stack_union.irq_stack, cpu) + IRQ_STACK_SIZE - 64;
+#ifdef CONFIG_NUMA
+ per_cpu(x86_cpu_to_node_map, cpu) =
+ early_per_cpu_map(x86_cpu_to_node_map, cpu);
+#endif
/*
* Up to this point, CPU0 has been using .data.init
* area. Reload %gs offset for CPU0.
@@ -184,7 +158,7 @@ void __init setup_per_cpu_areas(void)
/* indicate the early static arrays will soon be gone */
early_per_cpu_ptr(x86_cpu_to_apicid) = NULL;
early_per_cpu_ptr(x86_bios_cpu_apicid) = NULL;
-#ifdef X86_64_NUMA
+#if defined(CONFIG_X86_64) && defined(CONFIG_NUMA)
early_per_cpu_ptr(x86_cpu_to_node_map) = NULL;
#endif
@@ -197,204 +171,3 @@ void __init setup_per_cpu_areas(void)
#endif
-#ifdef X86_64_NUMA
-
-/*
- * Allocate node_to_cpumask_map based on number of available nodes
- * Requires node_possible_map to be valid.
- *
- * Note: node_to_cpumask() 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)
-{
- unsigned int node, num = 0;
- cpumask_t *map;
-
- /* setup nr_node_ids if not done yet */
- if (nr_node_ids == MAX_NUMNODES) {
- for_each_node_mask(node, node_possible_map)
- num = node;
- nr_node_ids = num + 1;
- }
-
- /* allocate the map */
- map = alloc_bootmem_low(nr_node_ids * sizeof(cpumask_t));
- DBG("node_to_cpumask_map at %p for %d nodes\n", map, nr_node_ids);
-
- pr_debug("Node to cpumask map at %p for %d nodes\n",
- map, nr_node_ids);
-
- /* node_to_cpumask() will now work */
- node_to_cpumask_map = map;
-}
-
-void __cpuinit numa_set_node(int cpu, int node)
-{
- int *cpu_to_node_map = early_per_cpu_ptr(x86_cpu_to_node_map);
-
- /* early setting, no percpu area yet */
- if (cpu_to_node_map) {
- cpu_to_node_map[cpu] = node;
- return;
- }
-
-#ifdef CONFIG_DEBUG_PER_CPU_MAPS
- if (cpu >= nr_cpu_ids || !per_cpu_offset(cpu)) {
- printk(KERN_ERR "numa_set_node: invalid cpu# (%d)\n", cpu);
- dump_stack();
- return;
- }
-#endif
- per_cpu(x86_cpu_to_node_map, cpu) = node;
-
- if (node != NUMA_NO_NODE)
- per_cpu(node_number, cpu) = node;
-}
-
-void __cpuinit numa_clear_node(int cpu)
-{
- numa_set_node(cpu, NUMA_NO_NODE);
-}
-
-#ifndef CONFIG_DEBUG_PER_CPU_MAPS
-
-void __cpuinit numa_add_cpu(int cpu)
-{
- cpu_set(cpu, node_to_cpumask_map[early_cpu_to_node(cpu)]);
-}
-
-void __cpuinit numa_remove_cpu(int cpu)
-{
- cpu_clear(cpu, node_to_cpumask_map[early_cpu_to_node(cpu)]);
-}
-
-#else /* CONFIG_DEBUG_PER_CPU_MAPS */
-
-/*
- * --------- debug versions of the numa functions ---------
- */
-static void __cpuinit numa_set_cpumask(int cpu, int enable)
-{
- int node = early_cpu_to_node(cpu);
- cpumask_t *mask;
- char buf[64];
-
- if (node_to_cpumask_map == NULL) {
- printk(KERN_ERR "node_to_cpumask_map NULL\n");
- dump_stack();
- return;
- }
-
- mask = &node_to_cpumask_map[node];
- if (enable)
- cpu_set(cpu, *mask);
- else
- cpu_clear(cpu, *mask);
-
- cpulist_scnprintf(buf, sizeof(buf), mask);
- printk(KERN_DEBUG "%s cpu %d node %d: mask now %s\n",
- enable ? "numa_add_cpu" : "numa_remove_cpu", cpu, node, buf);
-}
-
-void __cpuinit numa_add_cpu(int cpu)
-{
- numa_set_cpumask(cpu, 1);
-}
-
-void __cpuinit numa_remove_cpu(int cpu)
-{
- numa_set_cpumask(cpu, 0);
-}
-
-int cpu_to_node(int cpu)
-{
- if (early_per_cpu_ptr(x86_cpu_to_node_map)) {
- printk(KERN_WARNING
- "cpu_to_node(%d): usage too early!\n", cpu);
- dump_stack();
- return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu];
- }
- return per_cpu(x86_cpu_to_node_map, cpu);
-}
-EXPORT_SYMBOL(cpu_to_node);
-
-/*
- * Same function as cpu_to_node() but used if called before the
- * per_cpu areas are setup.
- */
-int early_cpu_to_node(int cpu)
-{
- if (early_per_cpu_ptr(x86_cpu_to_node_map))
- return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu];
-
- if (!per_cpu_offset(cpu)) {
- printk(KERN_WARNING
- "early_cpu_to_node(%d): no per_cpu area!\n", cpu);
- dump_stack();
- return NUMA_NO_NODE;
- }
- return per_cpu(x86_cpu_to_node_map, cpu);
-}
-
-
-/* empty cpumask */
-static const cpumask_t cpu_mask_none;
-
-/*
- * Returns a pointer to the bitmask of CPUs on Node 'node'.
- */
-const cpumask_t *cpumask_of_node(int node)
-{
- if (node_to_cpumask_map == NULL) {
- printk(KERN_WARNING
- "cpumask_of_node(%d): no node_to_cpumask_map!\n",
- node);
- dump_stack();
- return (const cpumask_t *)&cpu_online_map;
- }
- if (node >= nr_node_ids) {
- printk(KERN_WARNING
- "cpumask_of_node(%d): node > nr_node_ids(%d)\n",
- node, nr_node_ids);
- dump_stack();
- return &cpu_mask_none;
- }
- return &node_to_cpumask_map[node];
-}
-EXPORT_SYMBOL(cpumask_of_node);
-
-/*
- * Returns a bitmask of CPUs on Node 'node'.
- *
- * Side note: this function creates the returned cpumask on the stack
- * so with a high NR_CPUS count, excessive stack space is used. The
- * node_to_cpumask_ptr function should be used whenever possible.
- */
-cpumask_t node_to_cpumask(int node)
-{
- if (node_to_cpumask_map == NULL) {
- printk(KERN_WARNING
- "node_to_cpumask(%d): no node_to_cpumask_map!\n", node);
- dump_stack();
- return cpu_online_map;
- }
- if (node >= nr_node_ids) {
- printk(KERN_WARNING
- "node_to_cpumask(%d): node > nr_node_ids(%d)\n",
- node, nr_node_ids);
- dump_stack();
- return cpu_mask_none;
- }
- return node_to_cpumask_map[node];
-}
-EXPORT_SYMBOL(node_to_cpumask);
-
-/*
- * --------- end of debug versions of the numa functions ---------
- */
-
-#endif /* CONFIG_DEBUG_PER_CPU_MAPS */
-
-#endif /* X86_64_NUMA */
-
OpenPOWER on IntegriCloud