Commit | Line | Data |
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4fe29a85 GOC |
1 | #include <linux/kernel.h> |
2 | #include <linux/module.h> | |
3 | #include <linux/init.h> | |
4 | #include <linux/bootmem.h> | |
5 | #include <linux/percpu.h> | |
1ecd2765 | 6 | #include <linux/kexec.h> |
17b4cceb | 7 | #include <linux/crash_dump.h> |
8a87dd9a JSR |
8 | #include <linux/smp.h> |
9 | #include <linux/topology.h> | |
4fe29a85 GOC |
10 | #include <asm/sections.h> |
11 | #include <asm/processor.h> | |
12 | #include <asm/setup.h> | |
0fc0906e | 13 | #include <asm/mpspec.h> |
76eb4131 | 14 | #include <asm/apicdef.h> |
1ecd2765 | 15 | #include <asm/highmem.h> |
06879033 | 16 | #include <asm/cpumask.h> |
76eb4131 | 17 | |
c90aa894 MT |
18 | #ifdef CONFIG_DEBUG_PER_CPU_MAPS |
19 | # define DBG(x...) printk(KERN_DEBUG x) | |
20 | #else | |
21 | # define DBG(x...) | |
22 | #endif | |
23 | ||
f8955ebe | 24 | #ifdef CONFIG_X86_LOCAL_APIC |
2fe60147 AS |
25 | unsigned int num_processors; |
26 | unsigned disabled_cpus __cpuinitdata; | |
27 | /* Processor that is doing the boot up */ | |
28 | unsigned int boot_cpu_physical_apicid = -1U; | |
29 | EXPORT_SYMBOL(boot_cpu_physical_apicid); | |
8a87dd9a | 30 | unsigned int max_physical_apicid; |
2fe60147 | 31 | |
0fc0906e AS |
32 | /* Bitmask of physically existing CPUs */ |
33 | physid_mask_t phys_cpu_present_map; | |
f8955ebe | 34 | #endif |
0fc0906e | 35 | |
c90aa894 MT |
36 | /* |
37 | * Map cpu index to physical APIC ID | |
38 | */ | |
23ca4bba MT |
39 | DEFINE_EARLY_PER_CPU(u16, x86_cpu_to_apicid, BAD_APICID); |
40 | DEFINE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid, BAD_APICID); | |
41 | EXPORT_EARLY_PER_CPU_SYMBOL(x86_cpu_to_apicid); | |
42 | EXPORT_EARLY_PER_CPU_SYMBOL(x86_bios_cpu_apicid); | |
43 | ||
44 | #if defined(CONFIG_NUMA) && defined(CONFIG_X86_64) | |
c90aa894 | 45 | #define X86_64_NUMA 1 /* (used later) */ |
23ca4bba | 46 | |
c90aa894 MT |
47 | /* |
48 | * Map cpu index to node index | |
49 | */ | |
23ca4bba MT |
50 | DEFINE_EARLY_PER_CPU(int, x86_cpu_to_node_map, NUMA_NO_NODE); |
51 | EXPORT_EARLY_PER_CPU_SYMBOL(x86_cpu_to_node_map); | |
9f248bde | 52 | |
c90aa894 MT |
53 | /* |
54 | * Which logical CPUs are on which nodes | |
55 | */ | |
9f248bde MT |
56 | cpumask_t *node_to_cpumask_map; |
57 | EXPORT_SYMBOL(node_to_cpumask_map); | |
58 | ||
c90aa894 MT |
59 | /* |
60 | * Setup node_to_cpumask_map | |
61 | */ | |
9f248bde MT |
62 | static void __init setup_node_to_cpumask_map(void); |
63 | ||
64 | #else | |
65 | static inline void setup_node_to_cpumask_map(void) { } | |
23ca4bba MT |
66 | #endif |
67 | ||
c90aa894 | 68 | #ifdef CONFIG_HAVE_SETUP_PER_CPU_AREA |
4fe29a85 GOC |
69 | /* |
70 | * Copy data used in early init routines from the initial arrays to the | |
71 | * per cpu data areas. These arrays then become expendable and the | |
72 | * *_early_ptr's are zeroed indicating that the static arrays are gone. | |
73 | */ | |
74 | static void __init setup_per_cpu_maps(void) | |
75 | { | |
76 | int cpu; | |
77 | ||
78 | for_each_possible_cpu(cpu) { | |
23ca4bba MT |
79 | per_cpu(x86_cpu_to_apicid, cpu) = |
80 | early_per_cpu_map(x86_cpu_to_apicid, cpu); | |
b447a468 | 81 | per_cpu(x86_bios_cpu_apicid, cpu) = |
23ca4bba MT |
82 | early_per_cpu_map(x86_bios_cpu_apicid, cpu); |
83 | #ifdef X86_64_NUMA | |
b447a468 | 84 | per_cpu(x86_cpu_to_node_map, cpu) = |
23ca4bba | 85 | early_per_cpu_map(x86_cpu_to_node_map, cpu); |
4fe29a85 GOC |
86 | #endif |
87 | } | |
88 | ||
89 | /* indicate the early static arrays will soon be gone */ | |
23ca4bba MT |
90 | early_per_cpu_ptr(x86_cpu_to_apicid) = NULL; |
91 | early_per_cpu_ptr(x86_bios_cpu_apicid) = NULL; | |
92 | #ifdef X86_64_NUMA | |
93 | early_per_cpu_ptr(x86_cpu_to_node_map) = NULL; | |
4fe29a85 GOC |
94 | #endif |
95 | } | |
96 | ||
97 | #ifdef CONFIG_X86_32 | |
98 | /* | |
99 | * Great future not-so-futuristic plan: make i386 and x86_64 do it | |
100 | * the same way | |
101 | */ | |
102 | unsigned long __per_cpu_offset[NR_CPUS] __read_mostly; | |
103 | EXPORT_SYMBOL(__per_cpu_offset); | |
3461b0af MT |
104 | static inline void setup_cpu_pda_map(void) { } |
105 | ||
106 | #elif !defined(CONFIG_SMP) | |
107 | static inline void setup_cpu_pda_map(void) { } | |
108 | ||
109 | #else /* CONFIG_SMP && CONFIG_X86_64 */ | |
110 | ||
111 | /* | |
112 | * Allocate cpu_pda pointer table and array via alloc_bootmem. | |
113 | */ | |
114 | static void __init setup_cpu_pda_map(void) | |
115 | { | |
116 | char *pda; | |
3461b0af MT |
117 | unsigned long size; |
118 | int cpu; | |
119 | ||
120 | size = roundup(sizeof(struct x8664_pda), cache_line_size()); | |
121 | ||
122 | /* allocate cpu_pda array and pointer table */ | |
123 | { | |
3461b0af MT |
124 | unsigned long asize = size * (nr_cpu_ids - 1); |
125 | ||
c8f3329a | 126 | pda = alloc_bootmem(asize); |
3461b0af MT |
127 | } |
128 | ||
129 | /* initialize pointer table to static pda's */ | |
130 | for_each_possible_cpu(cpu) { | |
131 | if (cpu == 0) { | |
132 | /* leave boot cpu pda in place */ | |
3461b0af MT |
133 | continue; |
134 | } | |
c8f3329a TH |
135 | cpu_pda(cpu) = (struct x8664_pda *)pda; |
136 | cpu_pda(cpu)->in_bootmem = 1; | |
3461b0af MT |
137 | pda += size; |
138 | } | |
3461b0af | 139 | } |
c2d1cec1 MT |
140 | |
141 | #endif /* CONFIG_SMP && CONFIG_X86_64 */ | |
142 | ||
143 | #ifdef CONFIG_X86_64 | |
144 | ||
145 | /* correctly size the local cpu masks */ | |
146 | static void setup_cpu_local_masks(void) | |
147 | { | |
148 | alloc_bootmem_cpumask_var(&cpu_initialized_mask); | |
149 | alloc_bootmem_cpumask_var(&cpu_callin_mask); | |
150 | alloc_bootmem_cpumask_var(&cpu_callout_mask); | |
151 | alloc_bootmem_cpumask_var(&cpu_sibling_setup_mask); | |
152 | } | |
153 | ||
154 | #else /* CONFIG_X86_32 */ | |
155 | ||
156 | static inline void setup_cpu_local_masks(void) | |
157 | { | |
158 | } | |
159 | ||
160 | #endif /* CONFIG_X86_32 */ | |
4fe29a85 GOC |
161 | |
162 | /* | |
163 | * Great future plan: | |
164 | * Declare PDA itself and support (irqstack,tss,pgd) as per cpu data. | |
165 | * Always point %gs to its beginning | |
166 | */ | |
167 | void __init setup_per_cpu_areas(void) | |
168 | { | |
d6c88a50 | 169 | ssize_t size, old_size; |
3461b0af MT |
170 | char *ptr; |
171 | int cpu; | |
1f8ff037 | 172 | unsigned long align = 1; |
4fe29a85 | 173 | |
3461b0af MT |
174 | /* Setup cpu_pda map */ |
175 | setup_cpu_pda_map(); | |
176 | ||
4fe29a85 | 177 | /* Copy section for each CPU (we discard the original) */ |
1f3fcd4b | 178 | old_size = PERCPU_ENOUGH_ROOM; |
1f8ff037 | 179 | align = max_t(unsigned long, PAGE_SIZE, align); |
d6c88a50 | 180 | size = roundup(old_size, align); |
a1681965 | 181 | |
ab14398a | 182 | pr_info("NR_CPUS:%d nr_cpumask_bits:%d nr_cpu_ids:%d nr_node_ids:%d\n", |
a1681965 MT |
183 | NR_CPUS, nr_cpumask_bits, nr_cpu_ids, nr_node_ids); |
184 | ||
ab14398a | 185 | pr_info("PERCPU: Allocating %zd bytes of per cpu data\n", size); |
b447a468 | 186 | |
3461b0af | 187 | for_each_possible_cpu(cpu) { |
4fe29a85 | 188 | #ifndef CONFIG_NEED_MULTIPLE_NODES |
1f8ff037 YL |
189 | ptr = __alloc_bootmem(size, align, |
190 | __pa(MAX_DMA_ADDRESS)); | |
4fe29a85 | 191 | #else |
3461b0af | 192 | int node = early_cpu_to_node(cpu); |
b447a468 | 193 | if (!node_online(node) || !NODE_DATA(node)) { |
1f8ff037 YL |
194 | ptr = __alloc_bootmem(size, align, |
195 | __pa(MAX_DMA_ADDRESS)); | |
ab14398a | 196 | pr_info("cpu %d has no node %d or node-local memory\n", |
3461b0af | 197 | cpu, node); |
ab14398a CG |
198 | pr_debug("per cpu data for cpu%d at %016lx\n", |
199 | cpu, __pa(ptr)); | |
200 | } else { | |
1f8ff037 YL |
201 | ptr = __alloc_bootmem_node(NODE_DATA(node), size, align, |
202 | __pa(MAX_DMA_ADDRESS)); | |
ab14398a CG |
203 | pr_debug("per cpu data for cpu%d on node%d at %016lx\n", |
204 | cpu, node, __pa(ptr)); | |
a677f58a | 205 | } |
4fe29a85 | 206 | #endif |
3461b0af | 207 | per_cpu_offset(cpu) = ptr - __per_cpu_start; |
3e5d8f97 | 208 | memcpy(ptr, __per_cpu_load, __per_cpu_end - __per_cpu_start); |
c90aa894 MT |
209 | |
210 | DBG("PERCPU: cpu %4d %p\n", cpu, ptr); | |
4fe29a85 GOC |
211 | } |
212 | ||
b447a468 | 213 | /* Setup percpu data maps */ |
4fe29a85 | 214 | setup_per_cpu_maps(); |
9f0e8d04 | 215 | |
9f248bde MT |
216 | /* Setup node to cpumask map */ |
217 | setup_node_to_cpumask_map(); | |
c2d1cec1 MT |
218 | |
219 | /* Setup cpu initialized, callin, callout masks */ | |
220 | setup_cpu_local_masks(); | |
4fe29a85 GOC |
221 | } |
222 | ||
223 | #endif | |
c45a707d | 224 | |
23ca4bba | 225 | #ifdef X86_64_NUMA |
9f248bde MT |
226 | |
227 | /* | |
228 | * Allocate node_to_cpumask_map based on number of available nodes | |
229 | * Requires node_possible_map to be valid. | |
230 | * | |
231 | * Note: node_to_cpumask() is not valid until after this is done. | |
c90aa894 | 232 | * (Use CONFIG_DEBUG_PER_CPU_MAPS to check this.) |
9f248bde MT |
233 | */ |
234 | static void __init setup_node_to_cpumask_map(void) | |
235 | { | |
236 | unsigned int node, num = 0; | |
237 | cpumask_t *map; | |
238 | ||
239 | /* setup nr_node_ids if not done yet */ | |
240 | if (nr_node_ids == MAX_NUMNODES) { | |
241 | for_each_node_mask(node, node_possible_map) | |
242 | num = node; | |
243 | nr_node_ids = num + 1; | |
244 | } | |
245 | ||
246 | /* allocate the map */ | |
247 | map = alloc_bootmem_low(nr_node_ids * sizeof(cpumask_t)); | |
c90aa894 | 248 | DBG("node_to_cpumask_map at %p for %d nodes\n", map, nr_node_ids); |
9f248bde | 249 | |
55410791 | 250 | pr_debug("Node to cpumask map at %p for %d nodes\n", |
cfc1b9a6 | 251 | map, nr_node_ids); |
9f248bde MT |
252 | |
253 | /* node_to_cpumask() will now work */ | |
254 | node_to_cpumask_map = map; | |
255 | } | |
256 | ||
23ca4bba MT |
257 | void __cpuinit numa_set_node(int cpu, int node) |
258 | { | |
259 | int *cpu_to_node_map = early_per_cpu_ptr(x86_cpu_to_node_map); | |
260 | ||
c90aa894 MT |
261 | /* early setting, no percpu area yet */ |
262 | if (cpu_to_node_map) { | |
23ca4bba | 263 | cpu_to_node_map[cpu] = node; |
c90aa894 MT |
264 | return; |
265 | } | |
23ca4bba | 266 | |
c90aa894 MT |
267 | #ifdef CONFIG_DEBUG_PER_CPU_MAPS |
268 | if (cpu >= nr_cpu_ids || !per_cpu_offset(cpu)) { | |
269 | printk(KERN_ERR "numa_set_node: invalid cpu# (%d)\n", cpu); | |
270 | dump_stack(); | |
271 | return; | |
272 | } | |
273 | #endif | |
274 | per_cpu(x86_cpu_to_node_map, cpu) = node; | |
23ca4bba | 275 | |
c90aa894 MT |
276 | if (node != NUMA_NO_NODE) |
277 | cpu_pda(cpu)->nodenumber = node; | |
23ca4bba MT |
278 | } |
279 | ||
280 | void __cpuinit numa_clear_node(int cpu) | |
281 | { | |
282 | numa_set_node(cpu, NUMA_NO_NODE); | |
283 | } | |
284 | ||
9f248bde MT |
285 | #ifndef CONFIG_DEBUG_PER_CPU_MAPS |
286 | ||
23ca4bba MT |
287 | void __cpuinit numa_add_cpu(int cpu) |
288 | { | |
289 | cpu_set(cpu, node_to_cpumask_map[early_cpu_to_node(cpu)]); | |
290 | } | |
291 | ||
292 | void __cpuinit numa_remove_cpu(int cpu) | |
293 | { | |
c90aa894 | 294 | cpu_clear(cpu, node_to_cpumask_map[early_cpu_to_node(cpu)]); |
23ca4bba | 295 | } |
23ca4bba | 296 | |
9f248bde MT |
297 | #else /* CONFIG_DEBUG_PER_CPU_MAPS */ |
298 | ||
299 | /* | |
300 | * --------- debug versions of the numa functions --------- | |
301 | */ | |
302 | static void __cpuinit numa_set_cpumask(int cpu, int enable) | |
303 | { | |
c90aa894 | 304 | int node = early_cpu_to_node(cpu); |
9f248bde MT |
305 | cpumask_t *mask; |
306 | char buf[64]; | |
307 | ||
308 | if (node_to_cpumask_map == NULL) { | |
309 | printk(KERN_ERR "node_to_cpumask_map NULL\n"); | |
310 | dump_stack(); | |
311 | return; | |
312 | } | |
313 | ||
314 | mask = &node_to_cpumask_map[node]; | |
315 | if (enable) | |
316 | cpu_set(cpu, *mask); | |
317 | else | |
318 | cpu_clear(cpu, *mask); | |
319 | ||
29c0177e | 320 | cpulist_scnprintf(buf, sizeof(buf), mask); |
9f248bde | 321 | printk(KERN_DEBUG "%s cpu %d node %d: mask now %s\n", |
8a87dd9a JSR |
322 | enable ? "numa_add_cpu" : "numa_remove_cpu", cpu, node, buf); |
323 | } | |
9f248bde MT |
324 | |
325 | void __cpuinit numa_add_cpu(int cpu) | |
326 | { | |
327 | numa_set_cpumask(cpu, 1); | |
328 | } | |
329 | ||
330 | void __cpuinit numa_remove_cpu(int cpu) | |
331 | { | |
332 | numa_set_cpumask(cpu, 0); | |
333 | } | |
23ca4bba MT |
334 | |
335 | int cpu_to_node(int cpu) | |
336 | { | |
337 | if (early_per_cpu_ptr(x86_cpu_to_node_map)) { | |
338 | printk(KERN_WARNING | |
339 | "cpu_to_node(%d): usage too early!\n", cpu); | |
340 | dump_stack(); | |
341 | return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu]; | |
342 | } | |
343 | return per_cpu(x86_cpu_to_node_map, cpu); | |
344 | } | |
345 | EXPORT_SYMBOL(cpu_to_node); | |
346 | ||
9f248bde MT |
347 | /* |
348 | * Same function as cpu_to_node() but used if called before the | |
349 | * per_cpu areas are setup. | |
350 | */ | |
23ca4bba MT |
351 | int early_cpu_to_node(int cpu) |
352 | { | |
353 | if (early_per_cpu_ptr(x86_cpu_to_node_map)) | |
354 | return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu]; | |
355 | ||
356 | if (!per_cpu_offset(cpu)) { | |
357 | printk(KERN_WARNING | |
358 | "early_cpu_to_node(%d): no per_cpu area!\n", cpu); | |
9f248bde | 359 | dump_stack(); |
23ca4bba MT |
360 | return NUMA_NO_NODE; |
361 | } | |
362 | return per_cpu(x86_cpu_to_node_map, cpu); | |
363 | } | |
9f248bde | 364 | |
6a2f47ca MT |
365 | |
366 | /* empty cpumask */ | |
367 | static const cpumask_t cpu_mask_none; | |
368 | ||
9f248bde MT |
369 | /* |
370 | * Returns a pointer to the bitmask of CPUs on Node 'node'. | |
371 | */ | |
393d68fb | 372 | const cpumask_t *cpumask_of_node(int node) |
9f248bde MT |
373 | { |
374 | if (node_to_cpumask_map == NULL) { | |
375 | printk(KERN_WARNING | |
393d68fb | 376 | "cpumask_of_node(%d): no node_to_cpumask_map!\n", |
9f248bde MT |
377 | node); |
378 | dump_stack(); | |
11369f35 | 379 | return (const cpumask_t *)&cpu_online_map; |
9f248bde | 380 | } |
6a2f47ca MT |
381 | if (node >= nr_node_ids) { |
382 | printk(KERN_WARNING | |
393d68fb | 383 | "cpumask_of_node(%d): node > nr_node_ids(%d)\n", |
6a2f47ca MT |
384 | node, nr_node_ids); |
385 | dump_stack(); | |
11369f35 | 386 | return &cpu_mask_none; |
6a2f47ca | 387 | } |
11369f35 | 388 | return &node_to_cpumask_map[node]; |
9f248bde | 389 | } |
393d68fb | 390 | EXPORT_SYMBOL(cpumask_of_node); |
9f248bde MT |
391 | |
392 | /* | |
393 | * Returns a bitmask of CPUs on Node 'node'. | |
6a2f47ca MT |
394 | * |
395 | * Side note: this function creates the returned cpumask on the stack | |
396 | * so with a high NR_CPUS count, excessive stack space is used. The | |
397 | * node_to_cpumask_ptr function should be used whenever possible. | |
9f248bde MT |
398 | */ |
399 | cpumask_t node_to_cpumask(int node) | |
400 | { | |
401 | if (node_to_cpumask_map == NULL) { | |
402 | printk(KERN_WARNING | |
403 | "node_to_cpumask(%d): no node_to_cpumask_map!\n", node); | |
404 | dump_stack(); | |
405 | return cpu_online_map; | |
406 | } | |
6a2f47ca MT |
407 | if (node >= nr_node_ids) { |
408 | printk(KERN_WARNING | |
409 | "node_to_cpumask(%d): node > nr_node_ids(%d)\n", | |
410 | node, nr_node_ids); | |
411 | dump_stack(); | |
412 | return cpu_mask_none; | |
413 | } | |
9f248bde MT |
414 | return node_to_cpumask_map[node]; |
415 | } | |
416 | EXPORT_SYMBOL(node_to_cpumask); | |
417 | ||
418 | /* | |
419 | * --------- end of debug versions of the numa functions --------- | |
420 | */ | |
421 | ||
422 | #endif /* CONFIG_DEBUG_PER_CPU_MAPS */ | |
423 | ||
424 | #endif /* X86_64_NUMA */ | |
1ecd2765 | 425 |