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_BP_PREPARE_DYN or CPUHP_AP_ONLINE_DYN |
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_PERCPU_CNT_DEAD, |
94 | CPUHP_RADIX_DEAD, |
95 | CPUHP_PAGE_ALLOC, |
96 | CPUHP_NET_DEV_DEAD, |
97 | CPUHP_PCI_XGENE_DEAD, |
98 | CPUHP_IOMMU_IOVA_DEAD, |
99 | CPUHP_LUSTRE_CFS_DEAD, |
100 | CPUHP_AP_ARM_CACHE_B15_RAC_DEAD, |
101 | CPUHP_PADATA_DEAD, |
102 | CPUHP_AP_DTPM_CPU_DEAD, |
103 | CPUHP_RANDOM_PREPARE, |
104 | CPUHP_WORKQUEUE_PREP, |
105 | CPUHP_POWER_NUMA_PREPARE, |
106 | CPUHP_HRTIMERS_PREPARE, |
107 | CPUHP_PROFILE_PREPARE, |
108 | CPUHP_X2APIC_PREPARE, |
109 | CPUHP_SMPCFD_PREPARE, |
110 | CPUHP_RELAY_PREPARE, |
111 | CPUHP_SLAB_PREPARE, |
112 | CPUHP_MD_RAID5_PREPARE, |
113 | CPUHP_RCUTREE_PREP, |
114 | CPUHP_CPUIDLE_COUPLED_PREPARE, |
115 | CPUHP_POWERPC_PMAC_PREPARE, |
116 | CPUHP_POWERPC_MMU_CTX_PREPARE, |
117 | CPUHP_XEN_PREPARE, |
118 | CPUHP_XEN_EVTCHN_PREPARE, |
119 | CPUHP_ARM_SHMOBILE_SCU_PREPARE, |
120 | CPUHP_SH_SH3X_PREPARE, |
121 | CPUHP_NET_FLOW_PREPARE, |
122 | CPUHP_TOPOLOGY_PREPARE, |
123 | CPUHP_NET_IUCV_PREPARE, |
124 | CPUHP_ARM_BL_PREPARE, |
125 | CPUHP_TRACE_RB_PREPARE, |
126 | CPUHP_MM_ZS_PREPARE, |
127 | CPUHP_MM_ZSWP_MEM_PREPARE, |
128 | CPUHP_MM_ZSWP_POOL_PREPARE, |
129 | CPUHP_KVM_PPC_BOOK3S_PREPARE, |
130 | CPUHP_ZCOMP_PREPARE, |
131 | CPUHP_TIMERS_PREPARE, |
132 | CPUHP_MIPS_SOC_PREPARE, |
133 | CPUHP_BP_PREPARE_DYN, |
134 | CPUHP_BP_PREPARE_DYN_END = CPUHP_BP_PREPARE_DYN + 20, |
135 | CPUHP_BP_KICK_AP, |
136 | CPUHP_BRINGUP_CPU, |
137 | |
138 | /* |
139 | * STARTING section invoked on the hotplugged CPU in low level |
140 | * bringup and teardown code. |
141 | */ |
142 | CPUHP_AP_IDLE_DEAD, |
143 | CPUHP_AP_OFFLINE, |
144 | CPUHP_AP_CACHECTRL_STARTING, |
145 | CPUHP_AP_SCHED_STARTING, |
146 | CPUHP_AP_RCUTREE_DYING, |
147 | CPUHP_AP_CPU_PM_STARTING, |
148 | CPUHP_AP_IRQ_GIC_STARTING, |
149 | CPUHP_AP_IRQ_HIP04_STARTING, |
150 | CPUHP_AP_IRQ_APPLE_AIC_STARTING, |
151 | CPUHP_AP_IRQ_ARMADA_XP_STARTING, |
152 | CPUHP_AP_IRQ_BCM2836_STARTING, |
153 | CPUHP_AP_IRQ_MIPS_GIC_STARTING, |
154 | CPUHP_AP_IRQ_RISCV_STARTING, |
155 | CPUHP_AP_IRQ_LOONGARCH_STARTING, |
156 | CPUHP_AP_IRQ_SIFIVE_PLIC_STARTING, |
157 | CPUHP_AP_ARM_MVEBU_COHERENCY, |
158 | CPUHP_AP_MICROCODE_LOADER, |
159 | CPUHP_AP_PERF_X86_AMD_UNCORE_STARTING, |
160 | CPUHP_AP_PERF_X86_STARTING, |
161 | CPUHP_AP_PERF_X86_AMD_IBS_STARTING, |
162 | CPUHP_AP_PERF_X86_CQM_STARTING, |
163 | CPUHP_AP_PERF_X86_CSTATE_STARTING, |
164 | CPUHP_AP_PERF_XTENSA_STARTING, |
165 | CPUHP_AP_MIPS_OP_LOONGSON3_STARTING, |
166 | CPUHP_AP_ARM_VFP_STARTING, |
167 | CPUHP_AP_ARM64_DEBUG_MONITORS_STARTING, |
168 | CPUHP_AP_PERF_ARM_HW_BREAKPOINT_STARTING, |
169 | CPUHP_AP_PERF_ARM_ACPI_STARTING, |
170 | CPUHP_AP_PERF_ARM_STARTING, |
171 | CPUHP_AP_PERF_RISCV_STARTING, |
172 | CPUHP_AP_ARM_L2X0_STARTING, |
173 | CPUHP_AP_EXYNOS4_MCT_TIMER_STARTING, |
174 | CPUHP_AP_ARM_ARCH_TIMER_STARTING, |
175 | CPUHP_AP_ARM_ARCH_TIMER_EVTSTRM_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_XEN_RUNSTATE_STARTING, |
194 | CPUHP_AP_ARM_CORESIGHT_STARTING, |
195 | CPUHP_AP_ARM_CORESIGHT_CTI_STARTING, |
196 | CPUHP_AP_ARM64_ISNDEP_STARTING, |
197 | CPUHP_AP_SMPCFD_DYING, |
198 | CPUHP_AP_X86_TBOOT_DYING, |
199 | CPUHP_AP_ARM_CACHE_B15_RAC_DYING, |
200 | CPUHP_AP_ONLINE, |
201 | CPUHP_TEARDOWN_CPU, |
202 | |
203 | /* Online section invoked on the hotplugged CPU from the hotplug thread */ |
204 | CPUHP_AP_ONLINE_IDLE, |
205 | CPUHP_AP_HYPERV_ONLINE, |
206 | CPUHP_AP_KVM_ONLINE, |
207 | CPUHP_AP_SCHED_WAIT_EMPTY, |
208 | CPUHP_AP_SMPBOOT_THREADS, |
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 | return __cpuhp_setup_state(state, name, invoke: true, startup, teardown, multi_instance: 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, invoke: true, startup, |
308 | teardown, multi_instance: 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 | return __cpuhp_setup_state(state, name, invoke: false, startup, teardown, |
328 | multi_instance: 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, invoke: false, startup, |
350 | teardown, multi_instance: 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 | return __cpuhp_setup_state(state, name, invoke: false, |
373 | startup: (void *) startup, |
374 | teardown: (void *) teardown, multi_instance: 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, invoke: 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 | return __cpuhp_state_add_instance(state, node, invoke: 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, invoke: 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, invoke: 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, invoke: 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, invoke: 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, invoke: 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, invoke: 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 | return __cpuhp_state_remove_instance(state, node, invoke: 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 |
539 | |