x86: Unify CPU -> NUMA node mapping between 32 and 64bit
Unlike 64bit, 32bit has been using its own cpu_to_node_map[] for CPU -> NUMA node mapping. Replace it with early_percpu variable x86_cpu_to_node_map and share the mapping code with 64bit. * USE_PERCPU_NUMA_NODE_ID is now enabled for 32bit too. * x86_cpu_to_node_map and numa_set/clear_node() are moved from numa_64 to numa. For now, on 32bit, x86_cpu_to_node_map is initialized with 0 instead of NUMA_NO_NODE. This is to avoid introducing unexpected behavior change and will be updated once init path is unified. * srat_detect_node() is now enabled for x86_32 too. It calls numa_set_node() and initializes the mapping making explicit cpu_to_node_map[] updates from map/unmap_cpu_to_node() unnecessary. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: eric.dumazet@gmail.com Cc: yinghai@kernel.org Cc: brgerst@gmail.com Cc: gorcunov@gmail.com Cc: penberg@kernel.org Cc: shaohui.zheng@intel.com Cc: rientjes@google.com LKML-Reference: <1295789862-25482-15-git-send-email-tj@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: David Rientjes <rientjes@google.com>
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@ -1705,7 +1705,7 @@ config HAVE_ARCH_EARLY_PFN_TO_NID
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depends on NUMA
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config USE_PERCPU_NUMA_NODE_ID
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def_bool X86_64
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def_bool y
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depends on NUMA
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menu "Power management and ACPI options"
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@ -30,4 +30,12 @@ static inline void set_apicid_to_node(int apicid, s16 node)
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# include "numa_64.h"
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#endif
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#ifdef CONFIG_NUMA
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extern void __cpuinit numa_set_node(int cpu, int node);
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extern void __cpuinit numa_clear_node(int cpu);
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#else /* CONFIG_NUMA */
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static inline void numa_set_node(int cpu, int node) { }
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static inline void numa_clear_node(int cpu) { }
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#endif /* CONFIG_NUMA */
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#endif /* _ASM_X86_NUMA_H */
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@ -30,8 +30,6 @@ extern void setup_node_bootmem(int nodeid, unsigned long start,
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extern void __init init_cpu_to_node(void);
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extern int __cpuinit numa_cpu_node(int cpu);
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extern void __cpuinit numa_set_node(int cpu, int node);
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extern void __cpuinit numa_clear_node(int cpu);
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extern void __cpuinit numa_add_cpu(int cpu);
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extern void __cpuinit numa_remove_cpu(int cpu);
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@ -43,8 +41,6 @@ void numa_emu_cmdline(char *);
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#else
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static inline void init_cpu_to_node(void) { }
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static inline int numa_cpu_node(int cpu) { return NUMA_NO_NODE; }
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static inline void numa_set_node(int cpu, int node) { }
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static inline void numa_clear_node(int cpu) { }
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static inline void numa_add_cpu(int cpu, int node) { }
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static inline void numa_remove_cpu(int cpu) { }
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#endif
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@ -47,21 +47,6 @@
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#include <asm/mpspec.h>
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#ifdef CONFIG_X86_32
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/* Mappings between logical cpu number and node number */
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extern int cpu_to_node_map[];
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/* Returns the number of the node containing CPU 'cpu' */
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static inline int __cpu_to_node(int cpu)
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{
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return cpu_to_node_map[cpu];
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}
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#define early_cpu_to_node __cpu_to_node
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#define cpu_to_node __cpu_to_node
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#else /* CONFIG_X86_64 */
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/* Mappings between logical cpu number and node number */
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DECLARE_EARLY_PER_CPU(int, x86_cpu_to_node_map);
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@ -84,8 +69,6 @@ static inline int early_cpu_to_node(int cpu)
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#endif /* !CONFIG_DEBUG_PER_CPU_MAPS */
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#endif /* CONFIG_X86_64 */
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/* Mappings between node number and cpus on that node. */
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extern cpumask_var_t node_to_cpumask_map[MAX_NUMNODES];
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@ -590,12 +590,7 @@ static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
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if (nid == -1 || !node_online(nid))
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return;
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set_apicid_to_node(physid, nid);
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#ifdef CONFIG_X86_64
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numa_set_node(cpu, nid);
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#else /* CONFIG_X86_32 */
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cpu_to_node_map[cpu] = nid;
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#endif
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#endif
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}
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@ -233,7 +233,7 @@ static void __cpuinit init_amd_k7(struct cpuinfo_x86 *c)
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}
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#endif
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#if defined(CONFIG_NUMA) && defined(CONFIG_X86_64)
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#ifdef CONFIG_NUMA
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/*
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* To workaround broken NUMA config. Read the comment in
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* srat_detect_node().
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@ -338,7 +338,7 @@ EXPORT_SYMBOL_GPL(amd_get_nb_id);
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static void __cpuinit srat_detect_node(struct cpuinfo_x86 *c)
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{
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#if defined(CONFIG_NUMA) && defined(CONFIG_X86_64)
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#ifdef CONFIG_NUMA
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int cpu = smp_processor_id();
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int node;
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unsigned apicid = c->apicid;
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@ -276,7 +276,7 @@ static void __cpuinit intel_workarounds(struct cpuinfo_x86 *c)
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static void __cpuinit srat_detect_node(struct cpuinfo_x86 *c)
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{
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#if defined(CONFIG_NUMA) && defined(CONFIG_X86_64)
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#ifdef CONFIG_NUMA
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unsigned node;
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int cpu = smp_processor_id();
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@ -233,6 +233,7 @@ void __init setup_per_cpu_areas(void)
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per_cpu(irq_stack_ptr, cpu) =
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per_cpu(irq_stack_union.irq_stack, cpu) +
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IRQ_STACK_SIZE - 64;
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#endif
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#ifdef CONFIG_NUMA
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per_cpu(x86_cpu_to_node_map, cpu) =
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early_per_cpu_map(x86_cpu_to_node_map, cpu);
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@ -245,7 +246,6 @@ void __init setup_per_cpu_areas(void)
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* So set them all (boot cpu and all APs).
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*/
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set_cpu_numa_node(cpu, early_cpu_to_node(cpu));
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#endif
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#endif
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/*
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* Up to this point, the boot CPU has been using .init.data
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@ -263,7 +263,7 @@ void __init setup_per_cpu_areas(void)
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#ifdef CONFIG_X86_32
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early_per_cpu_ptr(x86_cpu_to_logical_apicid) = NULL;
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#endif
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#if defined(CONFIG_X86_64) && defined(CONFIG_NUMA)
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#ifdef CONFIG_NUMA
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early_per_cpu_ptr(x86_cpu_to_node_map) = NULL;
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#endif
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@ -133,16 +133,11 @@ EXPORT_PER_CPU_SYMBOL(cpu_info);
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atomic_t init_deasserted;
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#if defined(CONFIG_NUMA) && defined(CONFIG_X86_32)
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/* which node each logical CPU is on */
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int cpu_to_node_map[NR_CPUS] __read_mostly = { [0 ... NR_CPUS-1] = 0 };
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EXPORT_SYMBOL(cpu_to_node_map);
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/* set up a mapping between cpu and node. */
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static void map_cpu_to_node(int cpu, int node)
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{
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printk(KERN_INFO "Mapping cpu %d to node %d\n", cpu, node);
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cpumask_set_cpu(cpu, node_to_cpumask_map[node]);
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cpu_to_node_map[cpu] = node;
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}
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/* undo a mapping between cpu and node. */
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@ -153,7 +148,6 @@ static void unmap_cpu_to_node(int cpu)
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printk(KERN_INFO "Unmapping cpu %d from all nodes\n", cpu);
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for (node = 0; node < MAX_NUMNODES; node++)
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cpumask_clear_cpu(cpu, node_to_cpumask_map[node]);
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cpu_to_node_map[cpu] = 0;
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}
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#else /* !(CONFIG_NUMA && CONFIG_X86_32) */
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#define map_cpu_to_node(cpu, node) ({})
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@ -35,6 +35,44 @@ s16 __apicid_to_node[MAX_LOCAL_APIC] __cpuinitdata = {
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cpumask_var_t node_to_cpumask_map[MAX_NUMNODES];
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EXPORT_SYMBOL(node_to_cpumask_map);
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/*
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* Map cpu index to node index
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*/
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#ifdef CONFIG_X86_32
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DEFINE_EARLY_PER_CPU(int, x86_cpu_to_node_map, 0);
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#else
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DEFINE_EARLY_PER_CPU(int, x86_cpu_to_node_map, NUMA_NO_NODE);
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#endif
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EXPORT_EARLY_PER_CPU_SYMBOL(x86_cpu_to_node_map);
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void __cpuinit numa_set_node(int cpu, int node)
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{
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int *cpu_to_node_map = early_per_cpu_ptr(x86_cpu_to_node_map);
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/* early setting, no percpu area yet */
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if (cpu_to_node_map) {
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cpu_to_node_map[cpu] = node;
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return;
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}
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#ifdef CONFIG_DEBUG_PER_CPU_MAPS
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if (cpu >= nr_cpu_ids || !cpu_possible(cpu)) {
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printk(KERN_ERR "numa_set_node: invalid cpu# (%d)\n", cpu);
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dump_stack();
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return;
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}
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#endif
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per_cpu(x86_cpu_to_node_map, cpu) = node;
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if (node != NUMA_NO_NODE)
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set_cpu_numa_node(cpu, node);
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}
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void __cpuinit numa_clear_node(int cpu)
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{
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numa_set_node(cpu, NUMA_NO_NODE);
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}
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/*
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* Allocate node_to_cpumask_map based on number of available nodes
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* Requires node_possible_map to be valid.
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@ -62,6 +100,37 @@ void __init setup_node_to_cpumask_map(void)
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}
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#ifdef CONFIG_DEBUG_PER_CPU_MAPS
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int __cpu_to_node(int cpu)
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{
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if (early_per_cpu_ptr(x86_cpu_to_node_map)) {
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printk(KERN_WARNING
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"cpu_to_node(%d): usage too early!\n", cpu);
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dump_stack();
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return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu];
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}
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return per_cpu(x86_cpu_to_node_map, cpu);
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}
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EXPORT_SYMBOL(__cpu_to_node);
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/*
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* Same function as cpu_to_node() but used if called before the
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* per_cpu areas are setup.
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*/
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int early_cpu_to_node(int cpu)
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{
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if (early_per_cpu_ptr(x86_cpu_to_node_map))
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return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu];
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if (!cpu_possible(cpu)) {
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printk(KERN_WARNING
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"early_cpu_to_node(%d): no per_cpu area!\n", cpu);
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dump_stack();
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return NUMA_NO_NODE;
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}
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return per_cpu(x86_cpu_to_node_map, cpu);
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}
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/*
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* Returns a pointer to the bitmask of CPUs on Node 'node'.
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*/
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@ -84,4 +153,5 @@ const struct cpumask *cpumask_of_node(int node)
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return node_to_cpumask_map[node];
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}
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EXPORT_SYMBOL(cpumask_of_node);
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#endif
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#endif /* CONFIG_DEBUG_PER_CPU_MAPS */
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@ -29,12 +29,6 @@ struct memnode memnode;
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static unsigned long __initdata nodemap_addr;
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static unsigned long __initdata nodemap_size;
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/*
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* Map cpu index to node index
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*/
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DEFINE_EARLY_PER_CPU(int, x86_cpu_to_node_map, NUMA_NO_NODE);
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EXPORT_EARLY_PER_CPU_SYMBOL(x86_cpu_to_node_map);
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/*
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* Given a shift value, try to populate memnodemap[]
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* Returns :
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@ -732,34 +726,6 @@ int __cpuinit numa_cpu_node(int cpu)
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return NUMA_NO_NODE;
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}
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void __cpuinit numa_set_node(int cpu, int node)
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{
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int *cpu_to_node_map = early_per_cpu_ptr(x86_cpu_to_node_map);
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/* early setting, no percpu area yet */
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if (cpu_to_node_map) {
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cpu_to_node_map[cpu] = node;
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return;
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}
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#ifdef CONFIG_DEBUG_PER_CPU_MAPS
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if (cpu >= nr_cpu_ids || !cpu_possible(cpu)) {
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printk(KERN_ERR "numa_set_node: invalid cpu# (%d)\n", cpu);
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dump_stack();
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return;
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}
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#endif
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per_cpu(x86_cpu_to_node_map, cpu) = node;
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if (node != NUMA_NO_NODE)
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set_cpu_numa_node(cpu, node);
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}
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void __cpuinit numa_clear_node(int cpu)
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{
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numa_set_node(cpu, NUMA_NO_NODE);
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}
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#ifndef CONFIG_DEBUG_PER_CPU_MAPS
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#ifndef CONFIG_NUMA_EMU
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@ -887,37 +853,6 @@ void __cpuinit numa_remove_cpu(int cpu)
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{
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numa_set_cpumask(cpu, 0);
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}
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int __cpu_to_node(int cpu)
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{
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if (early_per_cpu_ptr(x86_cpu_to_node_map)) {
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printk(KERN_WARNING
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"cpu_to_node(%d): usage too early!\n", cpu);
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dump_stack();
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return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu];
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}
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return per_cpu(x86_cpu_to_node_map, cpu);
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}
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EXPORT_SYMBOL(__cpu_to_node);
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/*
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* Same function as cpu_to_node() but used if called before the
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* per_cpu areas are setup.
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*/
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int early_cpu_to_node(int cpu)
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{
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if (early_per_cpu_ptr(x86_cpu_to_node_map))
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return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu];
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if (!cpu_possible(cpu)) {
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printk(KERN_WARNING
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"early_cpu_to_node(%d): no per_cpu area!\n", cpu);
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dump_stack();
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return NUMA_NO_NODE;
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}
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return per_cpu(x86_cpu_to_node_map, cpu);
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}
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/*
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* --------- end of debug versions of the numa functions ---------
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*/
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