Commit | Line | Data |
---|---|---|
b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef __LINUX_CPUMASK_H |
3 | #define __LINUX_CPUMASK_H | |
4 | ||
5 | /* | |
6 | * Cpumasks provide a bitmap suitable for representing the | |
6ba2ef7b RR |
7 | * set of CPU's in a system, one bit position per CPU number. In general, |
8 | * only nr_cpu_ids (<= NR_CPUS) bits are valid. | |
1da177e4 | 9 | */ |
1da177e4 LT |
10 | #include <linux/kernel.h> |
11 | #include <linux/threads.h> | |
12 | #include <linux/bitmap.h> | |
0c09ab96 | 13 | #include <linux/atomic.h> |
187f1882 | 14 | #include <linux/bug.h> |
1da177e4 | 15 | |
cdfdef75 | 16 | /* Don't assign or return these: may not be this big! */ |
2d3854a3 | 17 | typedef struct cpumask { DECLARE_BITMAP(bits, NR_CPUS); } cpumask_t; |
1da177e4 | 18 | |
ae7a47e7 | 19 | /** |
6ba2ef7b RR |
20 | * cpumask_bits - get the bits in a cpumask |
21 | * @maskp: the struct cpumask * | |
ae7a47e7 | 22 | * |
6ba2ef7b RR |
23 | * You should only assume nr_cpu_ids bits of this mask are valid. This is |
24 | * a macro so it's const-correct. | |
ae7a47e7 | 25 | */ |
6ba2ef7b | 26 | #define cpumask_bits(maskp) ((maskp)->bits) |
7ea931c9 | 27 | |
f1bbc032 TH |
28 | /** |
29 | * cpumask_pr_args - printf args to output a cpumask | |
30 | * @maskp: cpumask to be printed | |
31 | * | |
32 | * Can be used to provide arguments for '%*pb[l]' when printing a cpumask. | |
33 | */ | |
34 | #define cpumask_pr_args(maskp) nr_cpu_ids, cpumask_bits(maskp) | |
35 | ||
41df0d61 | 36 | #if NR_CPUS == 1 |
9b130ad5 | 37 | #define nr_cpu_ids 1U |
6ba2ef7b | 38 | #else |
9b130ad5 | 39 | extern unsigned int nr_cpu_ids; |
41df0d61 MT |
40 | #endif |
41 | ||
6ba2ef7b RR |
42 | #ifdef CONFIG_CPUMASK_OFFSTACK |
43 | /* Assuming NR_CPUS is huge, a runtime limit is more efficient. Also, | |
44 | * not all bits may be allocated. */ | |
9b130ad5 | 45 | #define nr_cpumask_bits nr_cpu_ids |
6ba2ef7b | 46 | #else |
c311c797 | 47 | #define nr_cpumask_bits ((unsigned int)NR_CPUS) |
6ba2ef7b | 48 | #endif |
1da177e4 LT |
49 | |
50 | /* | |
51 | * The following particular system cpumasks and operations manage | |
b3199c02 | 52 | * possible, present, active and online cpus. |
1da177e4 | 53 | * |
b3199c02 RR |
54 | * cpu_possible_mask- has bit 'cpu' set iff cpu is populatable |
55 | * cpu_present_mask - has bit 'cpu' set iff cpu is populated | |
56 | * cpu_online_mask - has bit 'cpu' set iff cpu available to scheduler | |
57 | * cpu_active_mask - has bit 'cpu' set iff cpu available to migration | |
1da177e4 | 58 | * |
b3199c02 | 59 | * If !CONFIG_HOTPLUG_CPU, present == possible, and active == online. |
1da177e4 | 60 | * |
b3199c02 RR |
61 | * The cpu_possible_mask is fixed at boot time, as the set of CPU id's |
62 | * that it is possible might ever be plugged in at anytime during the | |
63 | * life of that system boot. The cpu_present_mask is dynamic(*), | |
64 | * representing which CPUs are currently plugged in. And | |
65 | * cpu_online_mask is the dynamic subset of cpu_present_mask, | |
66 | * indicating those CPUs available for scheduling. | |
67 | * | |
68 | * If HOTPLUG is enabled, then cpu_possible_mask is forced to have | |
1da177e4 LT |
69 | * all NR_CPUS bits set, otherwise it is just the set of CPUs that |
70 | * ACPI reports present at boot. | |
71 | * | |
b3199c02 | 72 | * If HOTPLUG is enabled, then cpu_present_mask varies dynamically, |
1da177e4 | 73 | * depending on what ACPI reports as currently plugged in, otherwise |
b3199c02 | 74 | * cpu_present_mask is just a copy of cpu_possible_mask. |
1da177e4 | 75 | * |
b3199c02 RR |
76 | * (*) Well, cpu_present_mask is dynamic in the hotplug case. If not |
77 | * hotplug, it's a copy of cpu_possible_mask, hence fixed at boot. | |
1da177e4 LT |
78 | * |
79 | * Subtleties: | |
80 | * 1) UP arch's (NR_CPUS == 1, CONFIG_SMP not defined) hardcode | |
81 | * assumption that their single CPU is online. The UP | |
b3199c02 | 82 | * cpu_{online,possible,present}_masks are placebos. Changing them |
1da177e4 LT |
83 | * will have no useful affect on the following num_*_cpus() |
84 | * and cpu_*() macros in the UP case. This ugliness is a UP | |
85 | * optimization - don't waste any instructions or memory references | |
86 | * asking if you're online or how many CPUs there are if there is | |
87 | * only one CPU. | |
1da177e4 LT |
88 | */ |
89 | ||
4b804c85 RV |
90 | extern struct cpumask __cpu_possible_mask; |
91 | extern struct cpumask __cpu_online_mask; | |
92 | extern struct cpumask __cpu_present_mask; | |
93 | extern struct cpumask __cpu_active_mask; | |
e40f74c5 | 94 | extern struct cpumask __cpu_dying_mask; |
5aec01b8 RV |
95 | #define cpu_possible_mask ((const struct cpumask *)&__cpu_possible_mask) |
96 | #define cpu_online_mask ((const struct cpumask *)&__cpu_online_mask) | |
97 | #define cpu_present_mask ((const struct cpumask *)&__cpu_present_mask) | |
98 | #define cpu_active_mask ((const struct cpumask *)&__cpu_active_mask) | |
e40f74c5 | 99 | #define cpu_dying_mask ((const struct cpumask *)&__cpu_dying_mask) |
b3199c02 | 100 | |
0c09ab96 TG |
101 | extern atomic_t __num_online_cpus; |
102 | ||
e797bda3 TG |
103 | extern cpumask_t cpus_booted_once_mask; |
104 | ||
f5c54f77 | 105 | static __always_inline void cpu_max_bits_warn(unsigned int cpu, unsigned int bits) |
2d3854a3 RR |
106 | { |
107 | #ifdef CONFIG_DEBUG_PER_CPU_MAPS | |
80d19669 | 108 | WARN_ON_ONCE(cpu >= bits); |
2d3854a3 | 109 | #endif /* CONFIG_DEBUG_PER_CPU_MAPS */ |
80d19669 AN |
110 | } |
111 | ||
112 | /* verify cpu argument to cpumask_* operators */ | |
f5c54f77 | 113 | static __always_inline unsigned int cpumask_check(unsigned int cpu) |
80d19669 AN |
114 | { |
115 | cpu_max_bits_warn(cpu, nr_cpumask_bits); | |
2d3854a3 RR |
116 | return cpu; |
117 | } | |
118 | ||
2d3854a3 RR |
119 | /** |
120 | * cpumask_first - get the first cpu in a cpumask | |
121 | * @srcp: the cpumask pointer | |
122 | * | |
123 | * Returns >= nr_cpu_ids if no cpus set. | |
124 | */ | |
125 | static inline unsigned int cpumask_first(const struct cpumask *srcp) | |
126 | { | |
127 | return find_first_bit(cpumask_bits(srcp), nr_cpumask_bits); | |
128 | } | |
129 | ||
9b51d9d8 YN |
130 | /** |
131 | * cpumask_first_zero - get the first unset cpu in a cpumask | |
132 | * @srcp: the cpumask pointer | |
133 | * | |
134 | * Returns >= nr_cpu_ids if all cpus are set. | |
135 | */ | |
136 | static inline unsigned int cpumask_first_zero(const struct cpumask *srcp) | |
137 | { | |
138 | return find_first_zero_bit(cpumask_bits(srcp), nr_cpumask_bits); | |
139 | } | |
140 | ||
93ba139b YN |
141 | /** |
142 | * cpumask_first_and - return the first cpu from *srcp1 & *srcp2 | |
143 | * @src1p: the first input | |
144 | * @src2p: the second input | |
145 | * | |
146 | * Returns >= nr_cpu_ids if no cpus set in both. See also cpumask_next_and(). | |
147 | */ | |
148 | static inline | |
149 | unsigned int cpumask_first_and(const struct cpumask *srcp1, const struct cpumask *srcp2) | |
150 | { | |
151 | return find_first_and_bit(cpumask_bits(srcp1), cpumask_bits(srcp2), nr_cpumask_bits); | |
152 | } | |
153 | ||
e22cdc3f RM |
154 | /** |
155 | * cpumask_last - get the last CPU in a cpumask | |
156 | * @srcp: - the cpumask pointer | |
157 | * | |
158 | * Returns >= nr_cpumask_bits if no CPUs set. | |
159 | */ | |
160 | static inline unsigned int cpumask_last(const struct cpumask *srcp) | |
161 | { | |
162 | return find_last_bit(cpumask_bits(srcp), nr_cpumask_bits); | |
163 | } | |
164 | ||
291c4011 | 165 | unsigned int __pure cpumask_next(int n, const struct cpumask *srcp); |
2d3854a3 RR |
166 | |
167 | /** | |
168 | * cpumask_next_zero - get the next unset cpu in a cpumask | |
169 | * @n: the cpu prior to the place to search (ie. return will be > @n) | |
170 | * @srcp: the cpumask pointer | |
171 | * | |
172 | * Returns >= nr_cpu_ids if no further cpus unset. | |
173 | */ | |
174 | static inline unsigned int cpumask_next_zero(int n, const struct cpumask *srcp) | |
175 | { | |
176 | /* -1 is a legal arg here. */ | |
177 | if (n != -1) | |
178 | cpumask_check(n); | |
179 | return find_next_zero_bit(cpumask_bits(srcp), nr_cpumask_bits, n+1); | |
180 | } | |
181 | ||
291c4011 NA |
182 | int __pure cpumask_next_and(int n, const struct cpumask *, const struct cpumask *); |
183 | int __pure cpumask_any_but(const struct cpumask *mask, unsigned int cpu); | |
b81dce77 SV |
184 | |
185 | #if NR_CPUS == 1 | |
186 | /* Uniprocessor: there is only one valid CPU */ | |
187 | static inline unsigned int cpumask_local_spread(unsigned int i, int node) | |
188 | { | |
189 | return 0; | |
190 | } | |
191 | ||
192 | static inline int cpumask_any_and_distribute(const struct cpumask *src1p, | |
193 | const struct cpumask *src2p) { | |
194 | return cpumask_first_and(src1p, src2p); | |
195 | } | |
196 | ||
197 | static inline int cpumask_any_distribute(const struct cpumask *srcp) | |
198 | { | |
199 | return cpumask_first(srcp); | |
200 | } | |
201 | #else | |
f36963c9 | 202 | unsigned int cpumask_local_spread(unsigned int i, int node); |
46a87b38 PT |
203 | int cpumask_any_and_distribute(const struct cpumask *src1p, |
204 | const struct cpumask *src2p); | |
14e292f8 | 205 | int cpumask_any_distribute(const struct cpumask *srcp); |
b81dce77 | 206 | #endif /* NR_CPUS */ |
2d3854a3 | 207 | |
984f2f37 RR |
208 | /** |
209 | * for_each_cpu - iterate over every cpu in a mask | |
210 | * @cpu: the (optionally unsigned) integer iterator | |
211 | * @mask: the cpumask pointer | |
212 | * | |
213 | * After the loop, cpu is >= nr_cpu_ids. | |
214 | */ | |
2d3854a3 RR |
215 | #define for_each_cpu(cpu, mask) \ |
216 | for ((cpu) = -1; \ | |
217 | (cpu) = cpumask_next((cpu), (mask)), \ | |
218 | (cpu) < nr_cpu_ids;) | |
984f2f37 | 219 | |
8bd93a2c PM |
220 | /** |
221 | * for_each_cpu_not - iterate over every cpu in a complemented mask | |
222 | * @cpu: the (optionally unsigned) integer iterator | |
223 | * @mask: the cpumask pointer | |
224 | * | |
225 | * After the loop, cpu is >= nr_cpu_ids. | |
226 | */ | |
227 | #define for_each_cpu_not(cpu, mask) \ | |
228 | for ((cpu) = -1; \ | |
229 | (cpu) = cpumask_next_zero((cpu), (mask)), \ | |
230 | (cpu) < nr_cpu_ids;) | |
231 | ||
c743f0a5 PZ |
232 | extern int cpumask_next_wrap(int n, const struct cpumask *mask, int start, bool wrap); |
233 | ||
234 | /** | |
235 | * for_each_cpu_wrap - iterate over every cpu in a mask, starting at a specified location | |
236 | * @cpu: the (optionally unsigned) integer iterator | |
c23c8082 | 237 | * @mask: the cpumask pointer |
c743f0a5 PZ |
238 | * @start: the start location |
239 | * | |
240 | * The implementation does not assume any bit in @mask is set (including @start). | |
241 | * | |
242 | * After the loop, cpu is >= nr_cpu_ids. | |
243 | */ | |
244 | #define for_each_cpu_wrap(cpu, mask, start) \ | |
245 | for ((cpu) = cpumask_next_wrap((start)-1, (mask), (start), false); \ | |
246 | (cpu) < nr_cpumask_bits; \ | |
247 | (cpu) = cpumask_next_wrap((cpu), (mask), (start), true)) | |
248 | ||
984f2f37 RR |
249 | /** |
250 | * for_each_cpu_and - iterate over every cpu in both masks | |
251 | * @cpu: the (optionally unsigned) integer iterator | |
2a4a4082 AD |
252 | * @mask1: the first cpumask pointer |
253 | * @mask2: the second cpumask pointer | |
984f2f37 RR |
254 | * |
255 | * This saves a temporary CPU mask in many places. It is equivalent to: | |
256 | * struct cpumask tmp; | |
2a4a4082 | 257 | * cpumask_and(&tmp, &mask1, &mask2); |
984f2f37 RR |
258 | * for_each_cpu(cpu, &tmp) |
259 | * ... | |
260 | * | |
261 | * After the loop, cpu is >= nr_cpu_ids. | |
262 | */ | |
2a4a4082 | 263 | #define for_each_cpu_and(cpu, mask1, mask2) \ |
2d3854a3 | 264 | for ((cpu) = -1; \ |
2a4a4082 | 265 | (cpu) = cpumask_next_and((cpu), (mask1), (mask2)), \ |
2d3854a3 | 266 | (cpu) < nr_cpu_ids;) |
2d3854a3 RR |
267 | |
268 | #define CPU_BITS_NONE \ | |
269 | { \ | |
270 | [0 ... BITS_TO_LONGS(NR_CPUS)-1] = 0UL \ | |
271 | } | |
272 | ||
273 | #define CPU_BITS_CPU0 \ | |
274 | { \ | |
275 | [0] = 1UL \ | |
276 | } | |
277 | ||
278 | /** | |
279 | * cpumask_set_cpu - set a cpu in a cpumask | |
280 | * @cpu: cpu number (< nr_cpu_ids) | |
281 | * @dstp: the cpumask pointer | |
282 | */ | |
1dc01aba | 283 | static __always_inline void cpumask_set_cpu(unsigned int cpu, struct cpumask *dstp) |
2d3854a3 RR |
284 | { |
285 | set_bit(cpumask_check(cpu), cpumask_bits(dstp)); | |
286 | } | |
287 | ||
1dc01aba | 288 | static __always_inline void __cpumask_set_cpu(unsigned int cpu, struct cpumask *dstp) |
6c8557bd PZ |
289 | { |
290 | __set_bit(cpumask_check(cpu), cpumask_bits(dstp)); | |
291 | } | |
292 | ||
293 | ||
2d3854a3 RR |
294 | /** |
295 | * cpumask_clear_cpu - clear a cpu in a cpumask | |
296 | * @cpu: cpu number (< nr_cpu_ids) | |
297 | * @dstp: the cpumask pointer | |
298 | */ | |
1dc01aba | 299 | static __always_inline void cpumask_clear_cpu(int cpu, struct cpumask *dstp) |
2d3854a3 RR |
300 | { |
301 | clear_bit(cpumask_check(cpu), cpumask_bits(dstp)); | |
302 | } | |
303 | ||
1dc01aba | 304 | static __always_inline void __cpumask_clear_cpu(int cpu, struct cpumask *dstp) |
6c8557bd PZ |
305 | { |
306 | __clear_bit(cpumask_check(cpu), cpumask_bits(dstp)); | |
307 | } | |
308 | ||
2d3854a3 RR |
309 | /** |
310 | * cpumask_test_cpu - test for a cpu in a cpumask | |
311 | * @cpu: cpu number (< nr_cpu_ids) | |
312 | * @cpumask: the cpumask pointer | |
313 | * | |
c777ad69 | 314 | * Returns 1 if @cpu is set in @cpumask, else returns 0 |
2d3854a3 | 315 | */ |
1dc01aba | 316 | static __always_inline int cpumask_test_cpu(int cpu, const struct cpumask *cpumask) |
3bbf7f46 RV |
317 | { |
318 | return test_bit(cpumask_check(cpu), cpumask_bits((cpumask))); | |
319 | } | |
2d3854a3 RR |
320 | |
321 | /** | |
322 | * cpumask_test_and_set_cpu - atomically test and set a cpu in a cpumask | |
323 | * @cpu: cpu number (< nr_cpu_ids) | |
324 | * @cpumask: the cpumask pointer | |
325 | * | |
c777ad69 AS |
326 | * Returns 1 if @cpu is set in old bitmap of @cpumask, else returns 0 |
327 | * | |
2d3854a3 RR |
328 | * test_and_set_bit wrapper for cpumasks. |
329 | */ | |
1dc01aba | 330 | static __always_inline int cpumask_test_and_set_cpu(int cpu, struct cpumask *cpumask) |
2d3854a3 RR |
331 | { |
332 | return test_and_set_bit(cpumask_check(cpu), cpumask_bits(cpumask)); | |
333 | } | |
334 | ||
54fdade1 XG |
335 | /** |
336 | * cpumask_test_and_clear_cpu - atomically test and clear a cpu in a cpumask | |
337 | * @cpu: cpu number (< nr_cpu_ids) | |
338 | * @cpumask: the cpumask pointer | |
339 | * | |
c777ad69 AS |
340 | * Returns 1 if @cpu is set in old bitmap of @cpumask, else returns 0 |
341 | * | |
54fdade1 XG |
342 | * test_and_clear_bit wrapper for cpumasks. |
343 | */ | |
1dc01aba | 344 | static __always_inline int cpumask_test_and_clear_cpu(int cpu, struct cpumask *cpumask) |
54fdade1 XG |
345 | { |
346 | return test_and_clear_bit(cpumask_check(cpu), cpumask_bits(cpumask)); | |
347 | } | |
348 | ||
2d3854a3 RR |
349 | /** |
350 | * cpumask_setall - set all cpus (< nr_cpu_ids) in a cpumask | |
351 | * @dstp: the cpumask pointer | |
352 | */ | |
353 | static inline void cpumask_setall(struct cpumask *dstp) | |
354 | { | |
355 | bitmap_fill(cpumask_bits(dstp), nr_cpumask_bits); | |
356 | } | |
357 | ||
358 | /** | |
359 | * cpumask_clear - clear all cpus (< nr_cpu_ids) in a cpumask | |
360 | * @dstp: the cpumask pointer | |
361 | */ | |
362 | static inline void cpumask_clear(struct cpumask *dstp) | |
363 | { | |
364 | bitmap_zero(cpumask_bits(dstp), nr_cpumask_bits); | |
365 | } | |
366 | ||
367 | /** | |
368 | * cpumask_and - *dstp = *src1p & *src2p | |
369 | * @dstp: the cpumask result | |
370 | * @src1p: the first input | |
371 | * @src2p: the second input | |
c777ad69 AS |
372 | * |
373 | * If *@dstp is empty, returns 0, else returns 1 | |
2d3854a3 | 374 | */ |
f4b0373b | 375 | static inline int cpumask_and(struct cpumask *dstp, |
2d3854a3 RR |
376 | const struct cpumask *src1p, |
377 | const struct cpumask *src2p) | |
378 | { | |
f4b0373b | 379 | return bitmap_and(cpumask_bits(dstp), cpumask_bits(src1p), |
2d3854a3 RR |
380 | cpumask_bits(src2p), nr_cpumask_bits); |
381 | } | |
382 | ||
383 | /** | |
384 | * cpumask_or - *dstp = *src1p | *src2p | |
385 | * @dstp: the cpumask result | |
386 | * @src1p: the first input | |
387 | * @src2p: the second input | |
388 | */ | |
389 | static inline void cpumask_or(struct cpumask *dstp, const struct cpumask *src1p, | |
390 | const struct cpumask *src2p) | |
391 | { | |
392 | bitmap_or(cpumask_bits(dstp), cpumask_bits(src1p), | |
393 | cpumask_bits(src2p), nr_cpumask_bits); | |
394 | } | |
395 | ||
396 | /** | |
397 | * cpumask_xor - *dstp = *src1p ^ *src2p | |
398 | * @dstp: the cpumask result | |
399 | * @src1p: the first input | |
400 | * @src2p: the second input | |
401 | */ | |
402 | static inline void cpumask_xor(struct cpumask *dstp, | |
403 | const struct cpumask *src1p, | |
404 | const struct cpumask *src2p) | |
405 | { | |
406 | bitmap_xor(cpumask_bits(dstp), cpumask_bits(src1p), | |
407 | cpumask_bits(src2p), nr_cpumask_bits); | |
408 | } | |
409 | ||
410 | /** | |
411 | * cpumask_andnot - *dstp = *src1p & ~*src2p | |
412 | * @dstp: the cpumask result | |
413 | * @src1p: the first input | |
414 | * @src2p: the second input | |
c777ad69 AS |
415 | * |
416 | * If *@dstp is empty, returns 0, else returns 1 | |
2d3854a3 | 417 | */ |
f4b0373b | 418 | static inline int cpumask_andnot(struct cpumask *dstp, |
2d3854a3 RR |
419 | const struct cpumask *src1p, |
420 | const struct cpumask *src2p) | |
421 | { | |
f4b0373b | 422 | return bitmap_andnot(cpumask_bits(dstp), cpumask_bits(src1p), |
2d3854a3 RR |
423 | cpumask_bits(src2p), nr_cpumask_bits); |
424 | } | |
425 | ||
426 | /** | |
427 | * cpumask_complement - *dstp = ~*srcp | |
428 | * @dstp: the cpumask result | |
429 | * @srcp: the input to invert | |
430 | */ | |
431 | static inline void cpumask_complement(struct cpumask *dstp, | |
432 | const struct cpumask *srcp) | |
433 | { | |
434 | bitmap_complement(cpumask_bits(dstp), cpumask_bits(srcp), | |
435 | nr_cpumask_bits); | |
436 | } | |
437 | ||
438 | /** | |
439 | * cpumask_equal - *src1p == *src2p | |
440 | * @src1p: the first input | |
441 | * @src2p: the second input | |
442 | */ | |
443 | static inline bool cpumask_equal(const struct cpumask *src1p, | |
444 | const struct cpumask *src2p) | |
445 | { | |
446 | return bitmap_equal(cpumask_bits(src1p), cpumask_bits(src2p), | |
447 | nr_cpumask_bits); | |
448 | } | |
449 | ||
b9fa6442 TG |
450 | /** |
451 | * cpumask_or_equal - *src1p | *src2p == *src3p | |
452 | * @src1p: the first input | |
453 | * @src2p: the second input | |
454 | * @src3p: the third input | |
455 | */ | |
456 | static inline bool cpumask_or_equal(const struct cpumask *src1p, | |
457 | const struct cpumask *src2p, | |
458 | const struct cpumask *src3p) | |
459 | { | |
460 | return bitmap_or_equal(cpumask_bits(src1p), cpumask_bits(src2p), | |
461 | cpumask_bits(src3p), nr_cpumask_bits); | |
462 | } | |
463 | ||
2d3854a3 RR |
464 | /** |
465 | * cpumask_intersects - (*src1p & *src2p) != 0 | |
466 | * @src1p: the first input | |
467 | * @src2p: the second input | |
468 | */ | |
469 | static inline bool cpumask_intersects(const struct cpumask *src1p, | |
470 | const struct cpumask *src2p) | |
471 | { | |
472 | return bitmap_intersects(cpumask_bits(src1p), cpumask_bits(src2p), | |
473 | nr_cpumask_bits); | |
474 | } | |
475 | ||
476 | /** | |
477 | * cpumask_subset - (*src1p & ~*src2p) == 0 | |
478 | * @src1p: the first input | |
479 | * @src2p: the second input | |
c777ad69 AS |
480 | * |
481 | * Returns 1 if *@src1p is a subset of *@src2p, else returns 0 | |
2d3854a3 RR |
482 | */ |
483 | static inline int cpumask_subset(const struct cpumask *src1p, | |
484 | const struct cpumask *src2p) | |
485 | { | |
486 | return bitmap_subset(cpumask_bits(src1p), cpumask_bits(src2p), | |
487 | nr_cpumask_bits); | |
488 | } | |
489 | ||
490 | /** | |
491 | * cpumask_empty - *srcp == 0 | |
492 | * @srcp: the cpumask to that all cpus < nr_cpu_ids are clear. | |
493 | */ | |
494 | static inline bool cpumask_empty(const struct cpumask *srcp) | |
495 | { | |
496 | return bitmap_empty(cpumask_bits(srcp), nr_cpumask_bits); | |
497 | } | |
498 | ||
499 | /** | |
500 | * cpumask_full - *srcp == 0xFFFFFFFF... | |
501 | * @srcp: the cpumask to that all cpus < nr_cpu_ids are set. | |
502 | */ | |
503 | static inline bool cpumask_full(const struct cpumask *srcp) | |
504 | { | |
505 | return bitmap_full(cpumask_bits(srcp), nr_cpumask_bits); | |
506 | } | |
507 | ||
508 | /** | |
509 | * cpumask_weight - Count of bits in *srcp | |
510 | * @srcp: the cpumask to count bits (< nr_cpu_ids) in. | |
511 | */ | |
512 | static inline unsigned int cpumask_weight(const struct cpumask *srcp) | |
513 | { | |
514 | return bitmap_weight(cpumask_bits(srcp), nr_cpumask_bits); | |
515 | } | |
516 | ||
517 | /** | |
518 | * cpumask_shift_right - *dstp = *srcp >> n | |
519 | * @dstp: the cpumask result | |
520 | * @srcp: the input to shift | |
521 | * @n: the number of bits to shift by | |
522 | */ | |
523 | static inline void cpumask_shift_right(struct cpumask *dstp, | |
524 | const struct cpumask *srcp, int n) | |
525 | { | |
526 | bitmap_shift_right(cpumask_bits(dstp), cpumask_bits(srcp), n, | |
527 | nr_cpumask_bits); | |
528 | } | |
529 | ||
530 | /** | |
531 | * cpumask_shift_left - *dstp = *srcp << n | |
532 | * @dstp: the cpumask result | |
533 | * @srcp: the input to shift | |
534 | * @n: the number of bits to shift by | |
535 | */ | |
536 | static inline void cpumask_shift_left(struct cpumask *dstp, | |
537 | const struct cpumask *srcp, int n) | |
538 | { | |
539 | bitmap_shift_left(cpumask_bits(dstp), cpumask_bits(srcp), n, | |
540 | nr_cpumask_bits); | |
541 | } | |
542 | ||
543 | /** | |
544 | * cpumask_copy - *dstp = *srcp | |
545 | * @dstp: the result | |
546 | * @srcp: the input cpumask | |
547 | */ | |
548 | static inline void cpumask_copy(struct cpumask *dstp, | |
549 | const struct cpumask *srcp) | |
550 | { | |
551 | bitmap_copy(cpumask_bits(dstp), cpumask_bits(srcp), nr_cpumask_bits); | |
552 | } | |
553 | ||
554 | /** | |
555 | * cpumask_any - pick a "random" cpu from *srcp | |
556 | * @srcp: the input cpumask | |
557 | * | |
558 | * Returns >= nr_cpu_ids if no cpus set. | |
559 | */ | |
560 | #define cpumask_any(srcp) cpumask_first(srcp) | |
561 | ||
2d3854a3 RR |
562 | /** |
563 | * cpumask_any_and - pick a "random" cpu from *mask1 & *mask2 | |
564 | * @mask1: the first input cpumask | |
565 | * @mask2: the second input cpumask | |
566 | * | |
567 | * Returns >= nr_cpu_ids if no cpus set. | |
568 | */ | |
569 | #define cpumask_any_and(mask1, mask2) cpumask_first_and((mask1), (mask2)) | |
570 | ||
cd83e42c RR |
571 | /** |
572 | * cpumask_of - the cpumask containing just a given cpu | |
573 | * @cpu: the cpu (<= nr_cpu_ids) | |
574 | */ | |
575 | #define cpumask_of(cpu) (get_cpu_mask(cpu)) | |
576 | ||
29c0177e RR |
577 | /** |
578 | * cpumask_parse_user - extract a cpumask from a user string | |
579 | * @buf: the buffer to extract from | |
580 | * @len: the length of the buffer | |
581 | * @dstp: the cpumask to set. | |
582 | * | |
583 | * Returns -errno, or 0 for success. | |
584 | */ | |
585 | static inline int cpumask_parse_user(const char __user *buf, int len, | |
586 | struct cpumask *dstp) | |
587 | { | |
4d59b6cc | 588 | return bitmap_parse_user(buf, len, cpumask_bits(dstp), nr_cpumask_bits); |
29c0177e RR |
589 | } |
590 | ||
4b060420 MT |
591 | /** |
592 | * cpumask_parselist_user - extract a cpumask from a user string | |
593 | * @buf: the buffer to extract from | |
594 | * @len: the length of the buffer | |
595 | * @dstp: the cpumask to set. | |
596 | * | |
597 | * Returns -errno, or 0 for success. | |
598 | */ | |
599 | static inline int cpumask_parselist_user(const char __user *buf, int len, | |
600 | struct cpumask *dstp) | |
601 | { | |
602 | return bitmap_parselist_user(buf, len, cpumask_bits(dstp), | |
4d59b6cc | 603 | nr_cpumask_bits); |
4b060420 MT |
604 | } |
605 | ||
ba630e49 | 606 | /** |
b06fb415 | 607 | * cpumask_parse - extract a cpumask from a string |
ba630e49 TH |
608 | * @buf: the buffer to extract from |
609 | * @dstp: the cpumask to set. | |
610 | * | |
611 | * Returns -errno, or 0 for success. | |
612 | */ | |
613 | static inline int cpumask_parse(const char *buf, struct cpumask *dstp) | |
614 | { | |
190535f7 | 615 | return bitmap_parse(buf, UINT_MAX, cpumask_bits(dstp), nr_cpumask_bits); |
ba630e49 TH |
616 | } |
617 | ||
29c0177e | 618 | /** |
231daf07 | 619 | * cpulist_parse - extract a cpumask from a user string of ranges |
29c0177e | 620 | * @buf: the buffer to extract from |
29c0177e RR |
621 | * @dstp: the cpumask to set. |
622 | * | |
623 | * Returns -errno, or 0 for success. | |
624 | */ | |
625 | static inline int cpulist_parse(const char *buf, struct cpumask *dstp) | |
626 | { | |
4d59b6cc | 627 | return bitmap_parselist(buf, cpumask_bits(dstp), nr_cpumask_bits); |
2d3854a3 RR |
628 | } |
629 | ||
630 | /** | |
631 | * cpumask_size - size to allocate for a 'struct cpumask' in bytes | |
2d3854a3 | 632 | */ |
4de373a1 | 633 | static inline unsigned int cpumask_size(void) |
2d3854a3 | 634 | { |
cdfdef75 | 635 | return BITS_TO_LONGS(nr_cpumask_bits) * sizeof(long); |
2d3854a3 RR |
636 | } |
637 | ||
638 | /* | |
639 | * cpumask_var_t: struct cpumask for stack usage. | |
640 | * | |
641 | * Oh, the wicked games we play! In order to make kernel coding a | |
642 | * little more difficult, we typedef cpumask_var_t to an array or a | |
643 | * pointer: doing &mask on an array is a noop, so it still works. | |
644 | * | |
645 | * ie. | |
646 | * cpumask_var_t tmpmask; | |
647 | * if (!alloc_cpumask_var(&tmpmask, GFP_KERNEL)) | |
648 | * return -ENOMEM; | |
649 | * | |
650 | * ... use 'tmpmask' like a normal struct cpumask * ... | |
651 | * | |
652 | * free_cpumask_var(tmpmask); | |
a64a26e8 KM |
653 | * |
654 | * | |
655 | * However, one notable exception is there. alloc_cpumask_var() allocates | |
656 | * only nr_cpumask_bits bits (in the other hand, real cpumask_t always has | |
657 | * NR_CPUS bits). Therefore you don't have to dereference cpumask_var_t. | |
658 | * | |
659 | * cpumask_var_t tmpmask; | |
660 | * if (!alloc_cpumask_var(&tmpmask, GFP_KERNEL)) | |
661 | * return -ENOMEM; | |
662 | * | |
663 | * var = *tmpmask; | |
664 | * | |
665 | * This code makes NR_CPUS length memcopy and brings to a memory corruption. | |
666 | * cpumask_copy() provide safe copy functionality. | |
4ba29684 CL |
667 | * |
668 | * Note that there is another evil here: If you define a cpumask_var_t | |
669 | * as a percpu variable then the way to obtain the address of the cpumask | |
670 | * structure differently influences what this_cpu_* operation needs to be | |
671 | * used. Please use this_cpu_cpumask_var_t in those cases. The direct use | |
672 | * of this_cpu_ptr() or this_cpu_read() will lead to failures when the | |
673 | * other type of cpumask_var_t implementation is configured. | |
668802c2 WL |
674 | * |
675 | * Please also note that __cpumask_var_read_mostly can be used to declare | |
676 | * a cpumask_var_t variable itself (not its content) as read mostly. | |
2d3854a3 RR |
677 | */ |
678 | #ifdef CONFIG_CPUMASK_OFFSTACK | |
679 | typedef struct cpumask *cpumask_var_t; | |
680 | ||
668802c2 WL |
681 | #define this_cpu_cpumask_var_ptr(x) this_cpu_read(x) |
682 | #define __cpumask_var_read_mostly __read_mostly | |
4ba29684 | 683 | |
7b4967c5 | 684 | bool alloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags, int node); |
2d3854a3 | 685 | bool alloc_cpumask_var(cpumask_var_t *mask, gfp_t flags); |
0281b5dc YL |
686 | bool zalloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags, int node); |
687 | bool zalloc_cpumask_var(cpumask_var_t *mask, gfp_t flags); | |
2d3854a3 RR |
688 | void alloc_bootmem_cpumask_var(cpumask_var_t *mask); |
689 | void free_cpumask_var(cpumask_var_t mask); | |
cd83e42c | 690 | void free_bootmem_cpumask_var(cpumask_var_t mask); |
2d3854a3 | 691 | |
f7e30f01 MK |
692 | static inline bool cpumask_available(cpumask_var_t mask) |
693 | { | |
694 | return mask != NULL; | |
695 | } | |
696 | ||
2d3854a3 RR |
697 | #else |
698 | typedef struct cpumask cpumask_var_t[1]; | |
699 | ||
4ba29684 | 700 | #define this_cpu_cpumask_var_ptr(x) this_cpu_ptr(x) |
668802c2 | 701 | #define __cpumask_var_read_mostly |
4ba29684 | 702 | |
2d3854a3 RR |
703 | static inline bool alloc_cpumask_var(cpumask_var_t *mask, gfp_t flags) |
704 | { | |
705 | return true; | |
706 | } | |
707 | ||
7b4967c5 MT |
708 | static inline bool alloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags, |
709 | int node) | |
710 | { | |
711 | return true; | |
712 | } | |
713 | ||
0281b5dc YL |
714 | static inline bool zalloc_cpumask_var(cpumask_var_t *mask, gfp_t flags) |
715 | { | |
716 | cpumask_clear(*mask); | |
717 | return true; | |
718 | } | |
719 | ||
720 | static inline bool zalloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags, | |
721 | int node) | |
722 | { | |
723 | cpumask_clear(*mask); | |
724 | return true; | |
725 | } | |
726 | ||
2d3854a3 RR |
727 | static inline void alloc_bootmem_cpumask_var(cpumask_var_t *mask) |
728 | { | |
729 | } | |
730 | ||
731 | static inline void free_cpumask_var(cpumask_var_t mask) | |
732 | { | |
733 | } | |
cd83e42c RR |
734 | |
735 | static inline void free_bootmem_cpumask_var(cpumask_var_t mask) | |
736 | { | |
737 | } | |
f7e30f01 MK |
738 | |
739 | static inline bool cpumask_available(cpumask_var_t mask) | |
740 | { | |
741 | return true; | |
742 | } | |
2d3854a3 RR |
743 | #endif /* CONFIG_CPUMASK_OFFSTACK */ |
744 | ||
2d3854a3 RR |
745 | /* It's common to want to use cpu_all_mask in struct member initializers, |
746 | * so it has to refer to an address rather than a pointer. */ | |
747 | extern const DECLARE_BITMAP(cpu_all_bits, NR_CPUS); | |
748 | #define cpu_all_mask to_cpumask(cpu_all_bits) | |
749 | ||
750 | /* First bits of cpu_bit_bitmap are in fact unset. */ | |
751 | #define cpu_none_mask to_cpumask(cpu_bit_bitmap[0]) | |
752 | ||
4f099030 SV |
753 | #if NR_CPUS == 1 |
754 | /* Uniprocessor: the possible/online/present masks are always "1" */ | |
755 | #define for_each_possible_cpu(cpu) for ((cpu) = 0; (cpu) < 1; (cpu)++) | |
756 | #define for_each_online_cpu(cpu) for ((cpu) = 0; (cpu) < 1; (cpu)++) | |
757 | #define for_each_present_cpu(cpu) for ((cpu) = 0; (cpu) < 1; (cpu)++) | |
758 | #else | |
ae7a47e7 RR |
759 | #define for_each_possible_cpu(cpu) for_each_cpu((cpu), cpu_possible_mask) |
760 | #define for_each_online_cpu(cpu) for_each_cpu((cpu), cpu_online_mask) | |
761 | #define for_each_present_cpu(cpu) for_each_cpu((cpu), cpu_present_mask) | |
4f099030 | 762 | #endif |
ae7a47e7 | 763 | |
2d3854a3 | 764 | /* Wrappers for arch boot code to manipulate normally-constant masks */ |
3fa41520 RR |
765 | void init_cpu_present(const struct cpumask *src); |
766 | void init_cpu_possible(const struct cpumask *src); | |
767 | void init_cpu_online(const struct cpumask *src); | |
6ba2ef7b | 768 | |
427d77a3 TG |
769 | static inline void reset_cpu_possible_mask(void) |
770 | { | |
771 | bitmap_zero(cpumask_bits(&__cpu_possible_mask), NR_CPUS); | |
772 | } | |
773 | ||
9425676a RV |
774 | static inline void |
775 | set_cpu_possible(unsigned int cpu, bool possible) | |
776 | { | |
777 | if (possible) | |
778 | cpumask_set_cpu(cpu, &__cpu_possible_mask); | |
779 | else | |
780 | cpumask_clear_cpu(cpu, &__cpu_possible_mask); | |
781 | } | |
782 | ||
783 | static inline void | |
784 | set_cpu_present(unsigned int cpu, bool present) | |
785 | { | |
786 | if (present) | |
787 | cpumask_set_cpu(cpu, &__cpu_present_mask); | |
788 | else | |
789 | cpumask_clear_cpu(cpu, &__cpu_present_mask); | |
790 | } | |
791 | ||
0c09ab96 | 792 | void set_cpu_online(unsigned int cpu, bool online); |
9425676a RV |
793 | |
794 | static inline void | |
795 | set_cpu_active(unsigned int cpu, bool active) | |
796 | { | |
797 | if (active) | |
798 | cpumask_set_cpu(cpu, &__cpu_active_mask); | |
799 | else | |
800 | cpumask_clear_cpu(cpu, &__cpu_active_mask); | |
801 | } | |
802 | ||
e40f74c5 PZ |
803 | static inline void |
804 | set_cpu_dying(unsigned int cpu, bool dying) | |
805 | { | |
806 | if (dying) | |
807 | cpumask_set_cpu(cpu, &__cpu_dying_mask); | |
808 | else | |
809 | cpumask_clear_cpu(cpu, &__cpu_dying_mask); | |
810 | } | |
9425676a | 811 | |
6ba2ef7b RR |
812 | /** |
813 | * to_cpumask - convert an NR_CPUS bitmap to a struct cpumask * | |
814 | * @bitmap: the bitmap | |
815 | * | |
816 | * There are a few places where cpumask_var_t isn't appropriate and | |
817 | * static cpumasks must be used (eg. very early boot), yet we don't | |
818 | * expose the definition of 'struct cpumask'. | |
819 | * | |
820 | * This does the conversion, and can be used as a constant initializer. | |
821 | */ | |
822 | #define to_cpumask(bitmap) \ | |
823 | ((struct cpumask *)(1 ? (bitmap) \ | |
824 | : (void *)sizeof(__check_is_bitmap(bitmap)))) | |
825 | ||
826 | static inline int __check_is_bitmap(const unsigned long *bitmap) | |
827 | { | |
828 | return 1; | |
829 | } | |
830 | ||
831 | /* | |
832 | * Special-case data structure for "single bit set only" constant CPU masks. | |
833 | * | |
834 | * We pre-generate all the 64 (or 32) possible bit positions, with enough | |
835 | * padding to the left and the right, and return the constant pointer | |
836 | * appropriately offset. | |
837 | */ | |
838 | extern const unsigned long | |
839 | cpu_bit_bitmap[BITS_PER_LONG+1][BITS_TO_LONGS(NR_CPUS)]; | |
840 | ||
841 | static inline const struct cpumask *get_cpu_mask(unsigned int cpu) | |
842 | { | |
843 | const unsigned long *p = cpu_bit_bitmap[1 + cpu % BITS_PER_LONG]; | |
844 | p -= cpu / BITS_PER_LONG; | |
845 | return to_cpumask(p); | |
846 | } | |
847 | ||
b02a4fd8 PZ |
848 | #if NR_CPUS > 1 |
849 | /** | |
850 | * num_online_cpus() - Read the number of online CPUs | |
851 | * | |
852 | * Despite the fact that __num_online_cpus is of type atomic_t, this | |
853 | * interface gives only a momentary snapshot and is not protected against | |
854 | * concurrent CPU hotplug operations unless invoked from a cpuhp_lock held | |
855 | * region. | |
856 | */ | |
857 | static inline unsigned int num_online_cpus(void) | |
858 | { | |
859 | return atomic_read(&__num_online_cpus); | |
860 | } | |
861 | #define num_possible_cpus() cpumask_weight(cpu_possible_mask) | |
862 | #define num_present_cpus() cpumask_weight(cpu_present_mask) | |
863 | #define num_active_cpus() cpumask_weight(cpu_active_mask) | |
864 | ||
865 | static inline bool cpu_online(unsigned int cpu) | |
866 | { | |
867 | return cpumask_test_cpu(cpu, cpu_online_mask); | |
868 | } | |
869 | ||
870 | static inline bool cpu_possible(unsigned int cpu) | |
871 | { | |
872 | return cpumask_test_cpu(cpu, cpu_possible_mask); | |
873 | } | |
874 | ||
875 | static inline bool cpu_present(unsigned int cpu) | |
876 | { | |
877 | return cpumask_test_cpu(cpu, cpu_present_mask); | |
878 | } | |
879 | ||
880 | static inline bool cpu_active(unsigned int cpu) | |
881 | { | |
882 | return cpumask_test_cpu(cpu, cpu_active_mask); | |
883 | } | |
884 | ||
e40f74c5 PZ |
885 | static inline bool cpu_dying(unsigned int cpu) |
886 | { | |
887 | return cpumask_test_cpu(cpu, cpu_dying_mask); | |
888 | } | |
889 | ||
b02a4fd8 PZ |
890 | #else |
891 | ||
892 | #define num_online_cpus() 1U | |
893 | #define num_possible_cpus() 1U | |
894 | #define num_present_cpus() 1U | |
895 | #define num_active_cpus() 1U | |
896 | ||
897 | static inline bool cpu_online(unsigned int cpu) | |
898 | { | |
899 | return cpu == 0; | |
900 | } | |
901 | ||
902 | static inline bool cpu_possible(unsigned int cpu) | |
903 | { | |
904 | return cpu == 0; | |
905 | } | |
906 | ||
907 | static inline bool cpu_present(unsigned int cpu) | |
908 | { | |
909 | return cpu == 0; | |
910 | } | |
911 | ||
912 | static inline bool cpu_active(unsigned int cpu) | |
913 | { | |
914 | return cpu == 0; | |
915 | } | |
916 | ||
e40f74c5 PZ |
917 | static inline bool cpu_dying(unsigned int cpu) |
918 | { | |
919 | return false; | |
920 | } | |
921 | ||
b02a4fd8 PZ |
922 | #endif /* NR_CPUS > 1 */ |
923 | ||
6ba2ef7b RR |
924 | #define cpu_is_offline(cpu) unlikely(!cpu_online(cpu)) |
925 | ||
926 | #if NR_CPUS <= BITS_PER_LONG | |
927 | #define CPU_BITS_ALL \ | |
928 | { \ | |
9941a383 | 929 | [BITS_TO_LONGS(NR_CPUS)-1] = BITMAP_LAST_WORD_MASK(NR_CPUS) \ |
6ba2ef7b RR |
930 | } |
931 | ||
932 | #else /* NR_CPUS > BITS_PER_LONG */ | |
933 | ||
934 | #define CPU_BITS_ALL \ | |
935 | { \ | |
936 | [0 ... BITS_TO_LONGS(NR_CPUS)-2] = ~0UL, \ | |
9941a383 | 937 | [BITS_TO_LONGS(NR_CPUS)-1] = BITMAP_LAST_WORD_MASK(NR_CPUS) \ |
6ba2ef7b RR |
938 | } |
939 | #endif /* NR_CPUS > BITS_PER_LONG */ | |
940 | ||
5aaba363 SH |
941 | /** |
942 | * cpumap_print_to_pagebuf - copies the cpumask into the buffer either | |
943 | * as comma-separated list of cpus or hex values of cpumask | |
944 | * @list: indicates whether the cpumap must be list | |
945 | * @mask: the cpumask to copy | |
946 | * @buf: the buffer to copy into | |
947 | * | |
948 | * Returns the length of the (null-terminated) @buf string, zero if | |
949 | * nothing is copied. | |
950 | */ | |
951 | static inline ssize_t | |
952 | cpumap_print_to_pagebuf(bool list, char *buf, const struct cpumask *mask) | |
953 | { | |
954 | return bitmap_print_to_pagebuf(list, buf, cpumask_bits(mask), | |
513e3d2d | 955 | nr_cpu_ids); |
5aaba363 SH |
956 | } |
957 | ||
1fae5629 TT |
958 | /** |
959 | * cpumap_print_bitmask_to_buf - copies the cpumask into the buffer as | |
960 | * hex values of cpumask | |
961 | * | |
962 | * @buf: the buffer to copy into | |
963 | * @mask: the cpumask to copy | |
964 | * @off: in the string from which we are copying, we copy to @buf | |
965 | * @count: the maximum number of bytes to print | |
966 | * | |
967 | * The function prints the cpumask into the buffer as hex values of | |
968 | * cpumask; Typically used by bin_attribute to export cpumask bitmask | |
969 | * ABI. | |
970 | * | |
c86a2d90 TK |
971 | * Returns the length of how many bytes have been copied, excluding |
972 | * terminating '\0'. | |
1fae5629 TT |
973 | */ |
974 | static inline ssize_t | |
975 | cpumap_print_bitmask_to_buf(char *buf, const struct cpumask *mask, | |
976 | loff_t off, size_t count) | |
977 | { | |
978 | return bitmap_print_bitmask_to_buf(buf, cpumask_bits(mask), | |
c86a2d90 | 979 | nr_cpu_ids, off, count) - 1; |
1fae5629 TT |
980 | } |
981 | ||
982 | /** | |
983 | * cpumap_print_list_to_buf - copies the cpumask into the buffer as | |
984 | * comma-separated list of cpus | |
985 | * | |
986 | * Everything is same with the above cpumap_print_bitmask_to_buf() | |
987 | * except the print format. | |
988 | */ | |
989 | static inline ssize_t | |
990 | cpumap_print_list_to_buf(char *buf, const struct cpumask *mask, | |
991 | loff_t off, size_t count) | |
992 | { | |
993 | return bitmap_print_list_to_buf(buf, cpumask_bits(mask), | |
c86a2d90 | 994 | nr_cpu_ids, off, count) - 1; |
1fae5629 TT |
995 | } |
996 | ||
6ba2ef7b | 997 | #if NR_CPUS <= BITS_PER_LONG |
6ba2ef7b RR |
998 | #define CPU_MASK_ALL \ |
999 | (cpumask_t) { { \ | |
9941a383 | 1000 | [BITS_TO_LONGS(NR_CPUS)-1] = BITMAP_LAST_WORD_MASK(NR_CPUS) \ |
6ba2ef7b | 1001 | } } |
6ba2ef7b | 1002 | #else |
6ba2ef7b RR |
1003 | #define CPU_MASK_ALL \ |
1004 | (cpumask_t) { { \ | |
1005 | [0 ... BITS_TO_LONGS(NR_CPUS)-2] = ~0UL, \ | |
9941a383 | 1006 | [BITS_TO_LONGS(NR_CPUS)-1] = BITMAP_LAST_WORD_MASK(NR_CPUS) \ |
6ba2ef7b | 1007 | } } |
9941a383 | 1008 | #endif /* NR_CPUS > BITS_PER_LONG */ |
6ba2ef7b RR |
1009 | |
1010 | #define CPU_MASK_NONE \ | |
1011 | (cpumask_t) { { \ | |
1012 | [0 ... BITS_TO_LONGS(NR_CPUS)-1] = 0UL \ | |
1013 | } } | |
1014 | ||
1527781d RR |
1015 | #define CPU_MASK_CPU0 \ |
1016 | (cpumask_t) { { \ | |
1017 | [0] = 1UL \ | |
1018 | } } | |
1019 | ||
1da177e4 | 1020 | #endif /* __LINUX_CPUMASK_H */ |