projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 71ee73e7 RR |
1 | /* Common code for 32 and 64-bit NUMA */ |
| 2 | #include <linux/topology.h> | |
| 3 | #include <linux/module.h> | |
| 4 | #include <linux/bootmem.h> | |
| 90321602 JB |
5 | #include <asm/numa.h> |
| 6 | #include <asm/acpi.h> | |
| 7 | ||
| 8 | int __initdata numa_off; | |
| 9 | ||
| 10 | static __init int numa_setup(char *opt) | |
| 11 | { | |
| 12 | if (!opt) | |
| 13 | return -EINVAL; | |
| 14 | if (!strncmp(opt, "off", 3)) | |
| 15 | numa_off = 1; | |
| 16 | #ifdef CONFIG_NUMA_EMU | |
| 17 | if (!strncmp(opt, "fake=", 5)) | |
| 18 | numa_emu_cmdline(opt + 5); | |
| 19 | #endif | |
| 20 | #ifdef CONFIG_ACPI_NUMA | |
| 21 | if (!strncmp(opt, "noacpi", 6)) | |
| 22 | acpi_numa = -1; | |
| 23 | #endif | |
| 24 | return 0; | |
| 25 | } | |
| 26 | early_param("numa", numa_setup); | |
| 71ee73e7 | 27 | |
| 71ee73e7 | 28 | /* |
| bbc9e2f4 | 29 | * apicid, cpu, node mappings |
| 71ee73e7 | 30 | */ |
| bbc9e2f4 TH |
31 | s16 __apicid_to_node[MAX_LOCAL_APIC] __cpuinitdata = { |
| 32 | [0 ... MAX_LOCAL_APIC-1] = NUMA_NO_NODE | |
| 33 | }; | |
| 34 | ||
| c032ef60 | 35 | cpumask_var_t node_to_cpumask_map[MAX_NUMNODES]; |
| 71ee73e7 RR |
36 | EXPORT_SYMBOL(node_to_cpumask_map); |
| 37 | ||
| 38 | /* | |
| 39 | * Allocate node_to_cpumask_map based on number of available nodes | |
| 40 | * Requires node_possible_map to be valid. | |
| 41 | * | |
| 42 | * Note: node_to_cpumask() is not valid until after this is done. | |
| 43 | * (Use CONFIG_DEBUG_PER_CPU_MAPS to check this.) | |
| 44 | */ | |
| 45 | void __init setup_node_to_cpumask_map(void) | |
| 46 | { | |
| 47 | unsigned int node, num = 0; | |
| 71ee73e7 RR |
48 | |
| 49 | /* setup nr_node_ids if not done yet */ | |
| 50 | if (nr_node_ids == MAX_NUMNODES) { | |
| 51 | for_each_node_mask(node, node_possible_map) | |
| 52 | num = node; | |
| 53 | nr_node_ids = num + 1; | |
| 54 | } | |
| 55 | ||
| 56 | /* allocate the map */ | |
| c032ef60 RR |
57 | for (node = 0; node < nr_node_ids; node++) |
| 58 | alloc_bootmem_cpumask_var(&node_to_cpumask_map[node]); | |
| 71ee73e7 | 59 | |
| c032ef60 RR |
60 | /* cpumask_of_node() will now work */ |
| 61 | pr_debug("Node to cpumask map for %d nodes\n", nr_node_ids); | |
| 71ee73e7 RR |
62 | } |
| 63 | ||
| 64 | #ifdef CONFIG_DEBUG_PER_CPU_MAPS | |
| 65 | /* | |
| 66 | * Returns a pointer to the bitmask of CPUs on Node 'node'. | |
| 67 | */ | |
| 73e907de | 68 | const struct cpumask *cpumask_of_node(int node) |
| 71ee73e7 | 69 | { |
| 71ee73e7 RR |
70 | if (node >= nr_node_ids) { |
| 71 | printk(KERN_WARNING | |
| 72 | "cpumask_of_node(%d): node > nr_node_ids(%d)\n", | |
| 73 | node, nr_node_ids); | |
| 74 | dump_stack(); | |
| 75 | return cpu_none_mask; | |
| 76 | } | |
| c032ef60 RR |
77 | if (node_to_cpumask_map[node] == NULL) { |
| 78 | printk(KERN_WARNING | |
| 79 | "cpumask_of_node(%d): no node_to_cpumask_map!\n", | |
| 80 | node); | |
| 81 | dump_stack(); | |
| 82 | return cpu_online_mask; | |
| 83 | } | |
| 0b966252 | 84 | return node_to_cpumask_map[node]; |
| 71ee73e7 RR |
85 | } |
| 86 | EXPORT_SYMBOL(cpumask_of_node); | |
| 87 | #endif |