Line data Source code
1 : /* SPDX-License-Identifier: GPL-2.0 */
2 : #ifndef __CPUHOTPLUG_H
3 : #define __CPUHOTPLUG_H
4 :
5 : #include <linux/types.h>
6 :
7 : /*
8 : * CPU-up CPU-down
9 : *
10 : * BP AP BP AP
11 : *
12 : * OFFLINE OFFLINE
13 : * | ^
14 : * v |
15 : * BRINGUP_CPU->AP_OFFLINE BRINGUP_CPU <- AP_IDLE_DEAD (idle thread/play_dead)
16 : * | AP_OFFLINE
17 : * v (IRQ-off) ,---------------^
18 : * AP_ONLNE | (stop_machine)
19 : * | TEARDOWN_CPU <- AP_ONLINE_IDLE
20 : * | ^
21 : * v |
22 : * AP_ACTIVE AP_ACTIVE
23 : */
24 :
25 : /*
26 : * CPU hotplug states. The state machine invokes the installed state
27 : * startup callbacks sequentially from CPUHP_OFFLINE + 1 to CPUHP_ONLINE
28 : * during a CPU online operation. During a CPU offline operation the
29 : * installed teardown callbacks are invoked in the reverse order from
30 : * CPU_ONLINE - 1 down to CPUHP_OFFLINE.
31 : *
32 : * The state space has three sections: PREPARE, STARTING and ONLINE.
33 : *
34 : * PREPARE: The callbacks are invoked on a control CPU before the
35 : * hotplugged CPU is started up or after the hotplugged CPU has died.
36 : *
37 : * STARTING: The callbacks are invoked on the hotplugged CPU from the low level
38 : * hotplug startup/teardown code with interrupts disabled.
39 : *
40 : * ONLINE: The callbacks are invoked on the hotplugged CPU from the per CPU
41 : * hotplug thread with interrupts and preemption enabled.
42 : *
43 : * Adding explicit states to this enum is only necessary when:
44 : *
45 : * 1) The state is within the STARTING section
46 : *
47 : * 2) The state has ordering constraints vs. other states in the
48 : * same section.
49 : *
50 : * If neither #1 nor #2 apply, please use the dynamic state space when
51 : * setting up a state by using CPUHP_PREPARE_DYN or CPUHP_PREPARE_ONLINE
52 : * for the @state argument of the setup function.
53 : *
54 : * See Documentation/core-api/cpu_hotplug.rst for further information and
55 : * examples.
56 : */
57 : enum cpuhp_state {
58 : CPUHP_INVALID = -1,
59 :
60 : /* PREPARE section invoked on a control CPU */
61 : CPUHP_OFFLINE = 0,
62 : CPUHP_CREATE_THREADS,
63 : CPUHP_PERF_PREPARE,
64 : CPUHP_PERF_X86_PREPARE,
65 : CPUHP_PERF_X86_AMD_UNCORE_PREP,
66 : CPUHP_PERF_POWER,
67 : CPUHP_PERF_SUPERH,
68 : CPUHP_X86_HPET_DEAD,
69 : CPUHP_X86_APB_DEAD,
70 : CPUHP_X86_MCE_DEAD,
71 : CPUHP_VIRT_NET_DEAD,
72 : CPUHP_IBMVNIC_DEAD,
73 : CPUHP_SLUB_DEAD,
74 : CPUHP_DEBUG_OBJ_DEAD,
75 : CPUHP_MM_WRITEBACK_DEAD,
76 : /* Must be after CPUHP_MM_VMSTAT_DEAD */
77 : CPUHP_MM_DEMOTION_DEAD,
78 : CPUHP_MM_VMSTAT_DEAD,
79 : CPUHP_SOFTIRQ_DEAD,
80 : CPUHP_NET_MVNETA_DEAD,
81 : CPUHP_CPUIDLE_DEAD,
82 : CPUHP_ARM64_FPSIMD_DEAD,
83 : CPUHP_ARM_OMAP_WAKE_DEAD,
84 : CPUHP_IRQ_POLL_DEAD,
85 : CPUHP_BLOCK_SOFTIRQ_DEAD,
86 : CPUHP_BIO_DEAD,
87 : CPUHP_ACPI_CPUDRV_DEAD,
88 : CPUHP_S390_PFAULT_DEAD,
89 : CPUHP_BLK_MQ_DEAD,
90 : CPUHP_FS_BUFF_DEAD,
91 : CPUHP_PRINTK_DEAD,
92 : CPUHP_MM_MEMCQ_DEAD,
93 : CPUHP_XFS_DEAD,
94 : CPUHP_PERCPU_CNT_DEAD,
95 : CPUHP_RADIX_DEAD,
96 : CPUHP_PAGE_ALLOC,
97 : CPUHP_NET_DEV_DEAD,
98 : CPUHP_PCI_XGENE_DEAD,
99 : CPUHP_IOMMU_IOVA_DEAD,
100 : CPUHP_LUSTRE_CFS_DEAD,
101 : CPUHP_AP_ARM_CACHE_B15_RAC_DEAD,
102 : CPUHP_PADATA_DEAD,
103 : CPUHP_AP_DTPM_CPU_DEAD,
104 : CPUHP_RANDOM_PREPARE,
105 : CPUHP_WORKQUEUE_PREP,
106 : CPUHP_POWER_NUMA_PREPARE,
107 : CPUHP_HRTIMERS_PREPARE,
108 : CPUHP_PROFILE_PREPARE,
109 : CPUHP_X2APIC_PREPARE,
110 : CPUHP_SMPCFD_PREPARE,
111 : CPUHP_RELAY_PREPARE,
112 : CPUHP_SLAB_PREPARE,
113 : CPUHP_MD_RAID5_PREPARE,
114 : CPUHP_RCUTREE_PREP,
115 : CPUHP_CPUIDLE_COUPLED_PREPARE,
116 : CPUHP_POWERPC_PMAC_PREPARE,
117 : CPUHP_POWERPC_MMU_CTX_PREPARE,
118 : CPUHP_XEN_PREPARE,
119 : CPUHP_XEN_EVTCHN_PREPARE,
120 : CPUHP_ARM_SHMOBILE_SCU_PREPARE,
121 : CPUHP_SH_SH3X_PREPARE,
122 : CPUHP_NET_FLOW_PREPARE,
123 : CPUHP_TOPOLOGY_PREPARE,
124 : CPUHP_NET_IUCV_PREPARE,
125 : CPUHP_ARM_BL_PREPARE,
126 : CPUHP_TRACE_RB_PREPARE,
127 : CPUHP_MM_ZS_PREPARE,
128 : CPUHP_MM_ZSWP_MEM_PREPARE,
129 : CPUHP_MM_ZSWP_POOL_PREPARE,
130 : CPUHP_KVM_PPC_BOOK3S_PREPARE,
131 : CPUHP_ZCOMP_PREPARE,
132 : CPUHP_TIMERS_PREPARE,
133 : CPUHP_MIPS_SOC_PREPARE,
134 : CPUHP_BP_PREPARE_DYN,
135 : CPUHP_BP_PREPARE_DYN_END = CPUHP_BP_PREPARE_DYN + 20,
136 : CPUHP_BP_KICK_AP,
137 : CPUHP_BRINGUP_CPU,
138 :
139 : /*
140 : * STARTING section invoked on the hotplugged CPU in low level
141 : * bringup and teardown code.
142 : */
143 : CPUHP_AP_IDLE_DEAD,
144 : CPUHP_AP_OFFLINE,
145 : CPUHP_AP_CACHECTRL_STARTING,
146 : CPUHP_AP_SCHED_STARTING,
147 : CPUHP_AP_RCUTREE_DYING,
148 : CPUHP_AP_CPU_PM_STARTING,
149 : CPUHP_AP_IRQ_GIC_STARTING,
150 : CPUHP_AP_IRQ_HIP04_STARTING,
151 : CPUHP_AP_IRQ_APPLE_AIC_STARTING,
152 : CPUHP_AP_IRQ_ARMADA_XP_STARTING,
153 : CPUHP_AP_IRQ_BCM2836_STARTING,
154 : CPUHP_AP_IRQ_MIPS_GIC_STARTING,
155 : CPUHP_AP_IRQ_RISCV_STARTING,
156 : CPUHP_AP_IRQ_LOONGARCH_STARTING,
157 : CPUHP_AP_IRQ_SIFIVE_PLIC_STARTING,
158 : CPUHP_AP_ARM_MVEBU_COHERENCY,
159 : CPUHP_AP_MICROCODE_LOADER,
160 : CPUHP_AP_PERF_X86_AMD_UNCORE_STARTING,
161 : CPUHP_AP_PERF_X86_STARTING,
162 : CPUHP_AP_PERF_X86_AMD_IBS_STARTING,
163 : CPUHP_AP_PERF_X86_CQM_STARTING,
164 : CPUHP_AP_PERF_X86_CSTATE_STARTING,
165 : CPUHP_AP_PERF_XTENSA_STARTING,
166 : CPUHP_AP_MIPS_OP_LOONGSON3_STARTING,
167 : CPUHP_AP_ARM_VFP_STARTING,
168 : CPUHP_AP_ARM64_DEBUG_MONITORS_STARTING,
169 : CPUHP_AP_PERF_ARM_HW_BREAKPOINT_STARTING,
170 : CPUHP_AP_PERF_ARM_ACPI_STARTING,
171 : CPUHP_AP_PERF_ARM_STARTING,
172 : CPUHP_AP_PERF_RISCV_STARTING,
173 : CPUHP_AP_ARM_L2X0_STARTING,
174 : CPUHP_AP_EXYNOS4_MCT_TIMER_STARTING,
175 : CPUHP_AP_ARM_ARCH_TIMER_STARTING,
176 : CPUHP_AP_ARM_GLOBAL_TIMER_STARTING,
177 : CPUHP_AP_JCORE_TIMER_STARTING,
178 : CPUHP_AP_ARM_TWD_STARTING,
179 : CPUHP_AP_QCOM_TIMER_STARTING,
180 : CPUHP_AP_TEGRA_TIMER_STARTING,
181 : CPUHP_AP_ARMADA_TIMER_STARTING,
182 : CPUHP_AP_MARCO_TIMER_STARTING,
183 : CPUHP_AP_MIPS_GIC_TIMER_STARTING,
184 : CPUHP_AP_ARC_TIMER_STARTING,
185 : CPUHP_AP_RISCV_TIMER_STARTING,
186 : CPUHP_AP_CLINT_TIMER_STARTING,
187 : CPUHP_AP_CSKY_TIMER_STARTING,
188 : CPUHP_AP_TI_GP_TIMER_STARTING,
189 : CPUHP_AP_HYPERV_TIMER_STARTING,
190 : /* Must be the last timer callback */
191 : CPUHP_AP_DUMMY_TIMER_STARTING,
192 : CPUHP_AP_ARM_XEN_STARTING,
193 : CPUHP_AP_ARM_CORESIGHT_STARTING,
194 : CPUHP_AP_ARM_CORESIGHT_CTI_STARTING,
195 : CPUHP_AP_ARM64_ISNDEP_STARTING,
196 : CPUHP_AP_SMPCFD_DYING,
197 : CPUHP_AP_X86_TBOOT_DYING,
198 : CPUHP_AP_ARM_CACHE_B15_RAC_DYING,
199 : CPUHP_AP_ONLINE,
200 : CPUHP_TEARDOWN_CPU,
201 :
202 : /* Online section invoked on the hotplugged CPU from the hotplug thread */
203 : CPUHP_AP_ONLINE_IDLE,
204 : CPUHP_AP_HYPERV_ONLINE,
205 : CPUHP_AP_KVM_ONLINE,
206 : CPUHP_AP_SCHED_WAIT_EMPTY,
207 : CPUHP_AP_SMPBOOT_THREADS,
208 : CPUHP_AP_X86_VDSO_VMA_ONLINE,
209 : CPUHP_AP_IRQ_AFFINITY_ONLINE,
210 : CPUHP_AP_BLK_MQ_ONLINE,
211 : CPUHP_AP_ARM_MVEBU_SYNC_CLOCKS,
212 : CPUHP_AP_X86_INTEL_EPB_ONLINE,
213 : CPUHP_AP_PERF_ONLINE,
214 : CPUHP_AP_PERF_X86_ONLINE,
215 : CPUHP_AP_PERF_X86_UNCORE_ONLINE,
216 : CPUHP_AP_PERF_X86_AMD_UNCORE_ONLINE,
217 : CPUHP_AP_PERF_X86_AMD_POWER_ONLINE,
218 : CPUHP_AP_PERF_X86_RAPL_ONLINE,
219 : CPUHP_AP_PERF_X86_CQM_ONLINE,
220 : CPUHP_AP_PERF_X86_CSTATE_ONLINE,
221 : CPUHP_AP_PERF_X86_IDXD_ONLINE,
222 : CPUHP_AP_PERF_S390_CF_ONLINE,
223 : CPUHP_AP_PERF_S390_SF_ONLINE,
224 : CPUHP_AP_PERF_ARM_CCI_ONLINE,
225 : CPUHP_AP_PERF_ARM_CCN_ONLINE,
226 : CPUHP_AP_PERF_ARM_HISI_CPA_ONLINE,
227 : CPUHP_AP_PERF_ARM_HISI_DDRC_ONLINE,
228 : CPUHP_AP_PERF_ARM_HISI_HHA_ONLINE,
229 : CPUHP_AP_PERF_ARM_HISI_L3_ONLINE,
230 : CPUHP_AP_PERF_ARM_HISI_PA_ONLINE,
231 : CPUHP_AP_PERF_ARM_HISI_SLLC_ONLINE,
232 : CPUHP_AP_PERF_ARM_HISI_PCIE_PMU_ONLINE,
233 : CPUHP_AP_PERF_ARM_HNS3_PMU_ONLINE,
234 : CPUHP_AP_PERF_ARM_L2X0_ONLINE,
235 : CPUHP_AP_PERF_ARM_QCOM_L2_ONLINE,
236 : CPUHP_AP_PERF_ARM_QCOM_L3_ONLINE,
237 : CPUHP_AP_PERF_ARM_APM_XGENE_ONLINE,
238 : CPUHP_AP_PERF_ARM_CAVIUM_TX2_UNCORE_ONLINE,
239 : CPUHP_AP_PERF_ARM_MARVELL_CN10K_DDR_ONLINE,
240 : CPUHP_AP_PERF_POWERPC_NEST_IMC_ONLINE,
241 : CPUHP_AP_PERF_POWERPC_CORE_IMC_ONLINE,
242 : CPUHP_AP_PERF_POWERPC_THREAD_IMC_ONLINE,
243 : CPUHP_AP_PERF_POWERPC_TRACE_IMC_ONLINE,
244 : CPUHP_AP_PERF_POWERPC_HV_24x7_ONLINE,
245 : CPUHP_AP_PERF_POWERPC_HV_GPCI_ONLINE,
246 : CPUHP_AP_PERF_CSKY_ONLINE,
247 : CPUHP_AP_WATCHDOG_ONLINE,
248 : CPUHP_AP_WORKQUEUE_ONLINE,
249 : CPUHP_AP_RANDOM_ONLINE,
250 : CPUHP_AP_RCUTREE_ONLINE,
251 : CPUHP_AP_BASE_CACHEINFO_ONLINE,
252 : CPUHP_AP_ONLINE_DYN,
253 : CPUHP_AP_ONLINE_DYN_END = CPUHP_AP_ONLINE_DYN + 30,
254 : /* Must be after CPUHP_AP_ONLINE_DYN for node_states[N_CPU] update */
255 : CPUHP_AP_MM_DEMOTION_ONLINE,
256 : CPUHP_AP_X86_HPET_ONLINE,
257 : CPUHP_AP_X86_KVM_CLK_ONLINE,
258 : CPUHP_AP_ACTIVE,
259 : CPUHP_ONLINE,
260 : };
261 :
262 : int __cpuhp_setup_state(enum cpuhp_state state, const char *name, bool invoke,
263 : int (*startup)(unsigned int cpu),
264 : int (*teardown)(unsigned int cpu), bool multi_instance);
265 :
266 : int __cpuhp_setup_state_cpuslocked(enum cpuhp_state state, const char *name,
267 : bool invoke,
268 : int (*startup)(unsigned int cpu),
269 : int (*teardown)(unsigned int cpu),
270 : bool multi_instance);
271 : /**
272 : * cpuhp_setup_state - Setup hotplug state callbacks with calling the @startup
273 : * callback
274 : * @state: The state for which the calls are installed
275 : * @name: Name of the callback (will be used in debug output)
276 : * @startup: startup callback function or NULL if not required
277 : * @teardown: teardown callback function or NULL if not required
278 : *
279 : * Installs the callback functions and invokes the @startup callback on
280 : * the online cpus which have already reached the @state.
281 : */
282 : static inline int cpuhp_setup_state(enum cpuhp_state state,
283 : const char *name,
284 : int (*startup)(unsigned int cpu),
285 : int (*teardown)(unsigned int cpu))
286 : {
287 5 : return __cpuhp_setup_state(state, name, true, startup, teardown, false);
288 : }
289 :
290 : /**
291 : * cpuhp_setup_state_cpuslocked - Setup hotplug state callbacks with calling
292 : * @startup callback from a cpus_read_lock()
293 : * held region
294 : * @state: The state for which the calls are installed
295 : * @name: Name of the callback (will be used in debug output)
296 : * @startup: startup callback function or NULL if not required
297 : * @teardown: teardown callback function or NULL if not required
298 : *
299 : * Same as cpuhp_setup_state() except that it must be invoked from within a
300 : * cpus_read_lock() held region.
301 : */
302 : static inline int cpuhp_setup_state_cpuslocked(enum cpuhp_state state,
303 : const char *name,
304 : int (*startup)(unsigned int cpu),
305 : int (*teardown)(unsigned int cpu))
306 : {
307 : return __cpuhp_setup_state_cpuslocked(state, name, true, startup,
308 : teardown, false);
309 : }
310 :
311 : /**
312 : * cpuhp_setup_state_nocalls - Setup hotplug state callbacks without calling the
313 : * @startup callback
314 : * @state: The state for which the calls are installed
315 : * @name: Name of the callback.
316 : * @startup: startup callback function or NULL if not required
317 : * @teardown: teardown callback function or NULL if not required
318 : *
319 : * Same as cpuhp_setup_state() except that the @startup callback is not
320 : * invoked during installation. NOP if SMP=n or HOTPLUG_CPU=n.
321 : */
322 : static inline int cpuhp_setup_state_nocalls(enum cpuhp_state state,
323 : const char *name,
324 : int (*startup)(unsigned int cpu),
325 : int (*teardown)(unsigned int cpu))
326 : {
327 9 : return __cpuhp_setup_state(state, name, false, startup, teardown,
328 : false);
329 : }
330 :
331 : /**
332 : * cpuhp_setup_state_nocalls_cpuslocked - Setup hotplug state callbacks without
333 : * invoking the @startup callback from
334 : * a cpus_read_lock() held region
335 : * callbacks
336 : * @state: The state for which the calls are installed
337 : * @name: Name of the callback.
338 : * @startup: startup callback function or NULL if not required
339 : * @teardown: teardown callback function or NULL if not required
340 : *
341 : * Same as cpuhp_setup_state_nocalls() except that it must be invoked from
342 : * within a cpus_read_lock() held region.
343 : */
344 : static inline int cpuhp_setup_state_nocalls_cpuslocked(enum cpuhp_state state,
345 : const char *name,
346 : int (*startup)(unsigned int cpu),
347 : int (*teardown)(unsigned int cpu))
348 : {
349 : return __cpuhp_setup_state_cpuslocked(state, name, false, startup,
350 : teardown, false);
351 : }
352 :
353 : /**
354 : * cpuhp_setup_state_multi - Add callbacks for multi state
355 : * @state: The state for which the calls are installed
356 : * @name: Name of the callback.
357 : * @startup: startup callback function or NULL if not required
358 : * @teardown: teardown callback function or NULL if not required
359 : *
360 : * Sets the internal multi_instance flag and prepares a state to work as a multi
361 : * instance callback. No callbacks are invoked at this point. The callbacks are
362 : * invoked once an instance for this state are registered via
363 : * cpuhp_state_add_instance() or cpuhp_state_add_instance_nocalls()
364 : */
365 : static inline int cpuhp_setup_state_multi(enum cpuhp_state state,
366 : const char *name,
367 : int (*startup)(unsigned int cpu,
368 : struct hlist_node *node),
369 : int (*teardown)(unsigned int cpu,
370 : struct hlist_node *node))
371 : {
372 4 : return __cpuhp_setup_state(state, name, false,
373 : (void *) startup,
374 : (void *) teardown, true);
375 : }
376 :
377 : int __cpuhp_state_add_instance(enum cpuhp_state state, struct hlist_node *node,
378 : bool invoke);
379 : int __cpuhp_state_add_instance_cpuslocked(enum cpuhp_state state,
380 : struct hlist_node *node, bool invoke);
381 :
382 : /**
383 : * cpuhp_state_add_instance - Add an instance for a state and invoke startup
384 : * callback.
385 : * @state: The state for which the instance is installed
386 : * @node: The node for this individual state.
387 : *
388 : * Installs the instance for the @state and invokes the registered startup
389 : * callback on the online cpus which have already reached the @state. The
390 : * @state must have been earlier marked as multi-instance by
391 : * cpuhp_setup_state_multi().
392 : */
393 : static inline int cpuhp_state_add_instance(enum cpuhp_state state,
394 : struct hlist_node *node)
395 : {
396 : return __cpuhp_state_add_instance(state, node, true);
397 : }
398 :
399 : /**
400 : * cpuhp_state_add_instance_nocalls - Add an instance for a state without
401 : * invoking the startup callback.
402 : * @state: The state for which the instance is installed
403 : * @node: The node for this individual state.
404 : *
405 : * Installs the instance for the @state. The @state must have been earlier
406 : * marked as multi-instance by cpuhp_setup_state_multi. NOP if SMP=n or
407 : * HOTPLUG_CPU=n.
408 : */
409 : static inline int cpuhp_state_add_instance_nocalls(enum cpuhp_state state,
410 : struct hlist_node *node)
411 : {
412 2 : return __cpuhp_state_add_instance(state, node, false);
413 : }
414 :
415 : /**
416 : * cpuhp_state_add_instance_nocalls_cpuslocked - Add an instance for a state
417 : * without invoking the startup
418 : * callback from a cpus_read_lock()
419 : * held region.
420 : * @state: The state for which the instance is installed
421 : * @node: The node for this individual state.
422 : *
423 : * Same as cpuhp_state_add_instance_nocalls() except that it must be
424 : * invoked from within a cpus_read_lock() held region.
425 : */
426 : static inline int
427 : cpuhp_state_add_instance_nocalls_cpuslocked(enum cpuhp_state state,
428 : struct hlist_node *node)
429 : {
430 : return __cpuhp_state_add_instance_cpuslocked(state, node, false);
431 : }
432 :
433 : void __cpuhp_remove_state(enum cpuhp_state state, bool invoke);
434 : void __cpuhp_remove_state_cpuslocked(enum cpuhp_state state, bool invoke);
435 :
436 : /**
437 : * cpuhp_remove_state - Remove hotplug state callbacks and invoke the teardown
438 : * @state: The state for which the calls are removed
439 : *
440 : * Removes the callback functions and invokes the teardown callback on
441 : * the online cpus which have already reached the @state.
442 : */
443 : static inline void cpuhp_remove_state(enum cpuhp_state state)
444 : {
445 : __cpuhp_remove_state(state, true);
446 : }
447 :
448 : /**
449 : * cpuhp_remove_state_nocalls - Remove hotplug state callbacks without invoking
450 : * the teardown callback
451 : * @state: The state for which the calls are removed
452 : */
453 : static inline void cpuhp_remove_state_nocalls(enum cpuhp_state state)
454 : {
455 : __cpuhp_remove_state(state, false);
456 : }
457 :
458 : /**
459 : * cpuhp_remove_state_nocalls_cpuslocked - Remove hotplug state callbacks without invoking
460 : * teardown from a cpus_read_lock() held region.
461 : * @state: The state for which the calls are removed
462 : *
463 : * Same as cpuhp_remove_state nocalls() except that it must be invoked
464 : * from within a cpus_read_lock() held region.
465 : */
466 : static inline void cpuhp_remove_state_nocalls_cpuslocked(enum cpuhp_state state)
467 : {
468 : __cpuhp_remove_state_cpuslocked(state, false);
469 : }
470 :
471 : /**
472 : * cpuhp_remove_multi_state - Remove hotplug multi state callback
473 : * @state: The state for which the calls are removed
474 : *
475 : * Removes the callback functions from a multi state. This is the reverse of
476 : * cpuhp_setup_state_multi(). All instances should have been removed before
477 : * invoking this function.
478 : */
479 : static inline void cpuhp_remove_multi_state(enum cpuhp_state state)
480 : {
481 : __cpuhp_remove_state(state, false);
482 : }
483 :
484 : int __cpuhp_state_remove_instance(enum cpuhp_state state,
485 : struct hlist_node *node, bool invoke);
486 :
487 : /**
488 : * cpuhp_state_remove_instance - Remove hotplug instance from state and invoke
489 : * the teardown callback
490 : * @state: The state from which the instance is removed
491 : * @node: The node for this individual state.
492 : *
493 : * Removes the instance and invokes the teardown callback on the online cpus
494 : * which have already reached @state.
495 : */
496 : static inline int cpuhp_state_remove_instance(enum cpuhp_state state,
497 : struct hlist_node *node)
498 : {
499 : return __cpuhp_state_remove_instance(state, node, true);
500 : }
501 :
502 : /**
503 : * cpuhp_state_remove_instance_nocalls - Remove hotplug instance from state
504 : * without invoking the teardown callback
505 : * @state: The state from which the instance is removed
506 : * @node: The node for this individual state.
507 : *
508 : * Removes the instance without invoking the teardown callback.
509 : */
510 : static inline int cpuhp_state_remove_instance_nocalls(enum cpuhp_state state,
511 : struct hlist_node *node)
512 : {
513 0 : return __cpuhp_state_remove_instance(state, node, false);
514 : }
515 :
516 : #ifdef CONFIG_SMP
517 : void cpuhp_online_idle(enum cpuhp_state state);
518 : #else
519 : static inline void cpuhp_online_idle(enum cpuhp_state state) { }
520 : #endif
521 :
522 : struct task_struct;
523 :
524 : void cpuhp_ap_sync_alive(void);
525 : void arch_cpuhp_sync_state_poll(void);
526 : void arch_cpuhp_cleanup_kick_cpu(unsigned int cpu);
527 : int arch_cpuhp_kick_ap_alive(unsigned int cpu, struct task_struct *tidle);
528 : bool arch_cpuhp_init_parallel_bringup(void);
529 :
530 : #ifdef CONFIG_HOTPLUG_CORE_SYNC_DEAD
531 : void cpuhp_ap_report_dead(void);
532 : void arch_cpuhp_cleanup_dead_cpu(unsigned int cpu);
533 : #else
534 : static inline void cpuhp_ap_report_dead(void) { }
535 : static inline void arch_cpuhp_cleanup_dead_cpu(unsigned int cpu) { }
536 : #endif
537 :
538 : #endif
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