Linux kernel mirror (for testing)
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linux
1#ifndef __CPUHOTPLUG_H
2#define __CPUHOTPLUG_H
3
4#include <linux/types.h>
5
6enum cpuhp_state {
7 CPUHP_OFFLINE,
8 CPUHP_CREATE_THREADS,
9 CPUHP_PERF_PREPARE,
10 CPUHP_PERF_X86_PREPARE,
11 CPUHP_PERF_X86_AMD_UNCORE_PREP,
12 CPUHP_PERF_BFIN,
13 CPUHP_PERF_POWER,
14 CPUHP_PERF_SUPERH,
15 CPUHP_X86_HPET_DEAD,
16 CPUHP_X86_APB_DEAD,
17 CPUHP_X86_MCE_DEAD,
18 CPUHP_VIRT_NET_DEAD,
19 CPUHP_SLUB_DEAD,
20 CPUHP_MM_WRITEBACK_DEAD,
21 CPUHP_MM_VMSTAT_DEAD,
22 CPUHP_SOFTIRQ_DEAD,
23 CPUHP_NET_MVNETA_DEAD,
24 CPUHP_CPUIDLE_DEAD,
25 CPUHP_ARM64_FPSIMD_DEAD,
26 CPUHP_ARM_OMAP_WAKE_DEAD,
27 CPUHP_IRQ_POLL_DEAD,
28 CPUHP_BLOCK_SOFTIRQ_DEAD,
29 CPUHP_VIRT_SCSI_DEAD,
30 CPUHP_ACPI_CPUDRV_DEAD,
31 CPUHP_S390_PFAULT_DEAD,
32 CPUHP_BLK_MQ_DEAD,
33 CPUHP_FS_BUFF_DEAD,
34 CPUHP_PRINTK_DEAD,
35 CPUHP_MM_MEMCQ_DEAD,
36 CPUHP_PERCPU_CNT_DEAD,
37 CPUHP_RADIX_DEAD,
38 CPUHP_PAGE_ALLOC_DEAD,
39 CPUHP_NET_DEV_DEAD,
40 CPUHP_PCI_XGENE_DEAD,
41 CPUHP_IOMMU_INTEL_DEAD,
42 CPUHP_LUSTRE_CFS_DEAD,
43 CPUHP_SCSI_BNX2FC_DEAD,
44 CPUHP_SCSI_BNX2I_DEAD,
45 CPUHP_WORKQUEUE_PREP,
46 CPUHP_POWER_NUMA_PREPARE,
47 CPUHP_HRTIMERS_PREPARE,
48 CPUHP_PROFILE_PREPARE,
49 CPUHP_X2APIC_PREPARE,
50 CPUHP_SMPCFD_PREPARE,
51 CPUHP_RELAY_PREPARE,
52 CPUHP_SLAB_PREPARE,
53 CPUHP_MD_RAID5_PREPARE,
54 CPUHP_RCUTREE_PREP,
55 CPUHP_CPUIDLE_COUPLED_PREPARE,
56 CPUHP_POWERPC_PMAC_PREPARE,
57 CPUHP_POWERPC_MMU_CTX_PREPARE,
58 CPUHP_XEN_PREPARE,
59 CPUHP_XEN_EVTCHN_PREPARE,
60 CPUHP_ARM_SHMOBILE_SCU_PREPARE,
61 CPUHP_SH_SH3X_PREPARE,
62 CPUHP_BLK_MQ_PREPARE,
63 CPUHP_NET_FLOW_PREPARE,
64 CPUHP_TOPOLOGY_PREPARE,
65 CPUHP_NET_IUCV_PREPARE,
66 CPUHP_ARM_BL_PREPARE,
67 CPUHP_TRACE_RB_PREPARE,
68 CPUHP_MM_ZS_PREPARE,
69 CPUHP_MM_ZSWP_MEM_PREPARE,
70 CPUHP_MM_ZSWP_POOL_PREPARE,
71 CPUHP_KVM_PPC_BOOK3S_PREPARE,
72 CPUHP_ZCOMP_PREPARE,
73 CPUHP_TIMERS_DEAD,
74 CPUHP_MIPS_SOC_PREPARE,
75 CPUHP_BP_PREPARE_DYN,
76 CPUHP_BP_PREPARE_DYN_END = CPUHP_BP_PREPARE_DYN + 20,
77 CPUHP_BRINGUP_CPU,
78 CPUHP_AP_IDLE_DEAD,
79 CPUHP_AP_OFFLINE,
80 CPUHP_AP_SCHED_STARTING,
81 CPUHP_AP_RCUTREE_DYING,
82 CPUHP_AP_IRQ_GIC_STARTING,
83 CPUHP_AP_IRQ_HIP04_STARTING,
84 CPUHP_AP_IRQ_ARMADA_XP_STARTING,
85 CPUHP_AP_IRQ_BCM2836_STARTING,
86 CPUHP_AP_ARM_MVEBU_COHERENCY,
87 CPUHP_AP_PERF_X86_AMD_UNCORE_STARTING,
88 CPUHP_AP_PERF_X86_STARTING,
89 CPUHP_AP_PERF_X86_AMD_IBS_STARTING,
90 CPUHP_AP_PERF_X86_CQM_STARTING,
91 CPUHP_AP_PERF_X86_CSTATE_STARTING,
92 CPUHP_AP_PERF_XTENSA_STARTING,
93 CPUHP_AP_PERF_METAG_STARTING,
94 CPUHP_AP_MIPS_OP_LOONGSON3_STARTING,
95 CPUHP_AP_ARM_VFP_STARTING,
96 CPUHP_AP_ARM64_DEBUG_MONITORS_STARTING,
97 CPUHP_AP_PERF_ARM_HW_BREAKPOINT_STARTING,
98 CPUHP_AP_PERF_ARM_STARTING,
99 CPUHP_AP_ARM_L2X0_STARTING,
100 CPUHP_AP_ARM_ARCH_TIMER_STARTING,
101 CPUHP_AP_ARM_GLOBAL_TIMER_STARTING,
102 CPUHP_AP_JCORE_TIMER_STARTING,
103 CPUHP_AP_EXYNOS4_MCT_TIMER_STARTING,
104 CPUHP_AP_ARM_TWD_STARTING,
105 CPUHP_AP_METAG_TIMER_STARTING,
106 CPUHP_AP_QCOM_TIMER_STARTING,
107 CPUHP_AP_ARMADA_TIMER_STARTING,
108 CPUHP_AP_MARCO_TIMER_STARTING,
109 CPUHP_AP_MIPS_GIC_TIMER_STARTING,
110 CPUHP_AP_ARC_TIMER_STARTING,
111 CPUHP_AP_KVM_STARTING,
112 CPUHP_AP_KVM_ARM_VGIC_INIT_STARTING,
113 CPUHP_AP_KVM_ARM_VGIC_STARTING,
114 CPUHP_AP_KVM_ARM_TIMER_STARTING,
115 /* Must be the last timer callback */
116 CPUHP_AP_DUMMY_TIMER_STARTING,
117 CPUHP_AP_ARM_XEN_STARTING,
118 CPUHP_AP_ARM_CORESIGHT_STARTING,
119 CPUHP_AP_ARM64_ISNDEP_STARTING,
120 CPUHP_AP_SMPCFD_DYING,
121 CPUHP_AP_X86_TBOOT_DYING,
122 CPUHP_AP_ONLINE,
123 CPUHP_TEARDOWN_CPU,
124 CPUHP_AP_ONLINE_IDLE,
125 CPUHP_AP_SMPBOOT_THREADS,
126 CPUHP_AP_X86_VDSO_VMA_ONLINE,
127 CPUHP_AP_PERF_ONLINE,
128 CPUHP_AP_PERF_X86_ONLINE,
129 CPUHP_AP_PERF_X86_UNCORE_ONLINE,
130 CPUHP_AP_PERF_X86_AMD_UNCORE_ONLINE,
131 CPUHP_AP_PERF_X86_AMD_POWER_ONLINE,
132 CPUHP_AP_PERF_X86_RAPL_ONLINE,
133 CPUHP_AP_PERF_X86_CQM_ONLINE,
134 CPUHP_AP_PERF_X86_CSTATE_ONLINE,
135 CPUHP_AP_PERF_S390_CF_ONLINE,
136 CPUHP_AP_PERF_S390_SF_ONLINE,
137 CPUHP_AP_PERF_ARM_CCI_ONLINE,
138 CPUHP_AP_PERF_ARM_CCN_ONLINE,
139 CPUHP_AP_PERF_ARM_L2X0_ONLINE,
140 CPUHP_AP_WORKQUEUE_ONLINE,
141 CPUHP_AP_RCUTREE_ONLINE,
142 CPUHP_AP_ONLINE_DYN,
143 CPUHP_AP_ONLINE_DYN_END = CPUHP_AP_ONLINE_DYN + 30,
144 CPUHP_AP_X86_HPET_ONLINE,
145 CPUHP_AP_X86_KVM_CLK_ONLINE,
146 CPUHP_AP_ACTIVE,
147 CPUHP_ONLINE,
148};
149
150int __cpuhp_setup_state(enum cpuhp_state state, const char *name, bool invoke,
151 int (*startup)(unsigned int cpu),
152 int (*teardown)(unsigned int cpu), bool multi_instance);
153
154/**
155 * cpuhp_setup_state - Setup hotplug state callbacks with calling the callbacks
156 * @state: The state for which the calls are installed
157 * @name: Name of the callback (will be used in debug output)
158 * @startup: startup callback function
159 * @teardown: teardown callback function
160 *
161 * Installs the callback functions and invokes the startup callback on
162 * the present cpus which have already reached the @state.
163 */
164static inline int cpuhp_setup_state(enum cpuhp_state state,
165 const char *name,
166 int (*startup)(unsigned int cpu),
167 int (*teardown)(unsigned int cpu))
168{
169 return __cpuhp_setup_state(state, name, true, startup, teardown, false);
170}
171
172/**
173 * cpuhp_setup_state_nocalls - Setup hotplug state callbacks without calling the
174 * callbacks
175 * @state: The state for which the calls are installed
176 * @name: Name of the callback.
177 * @startup: startup callback function
178 * @teardown: teardown callback function
179 *
180 * Same as @cpuhp_setup_state except that no calls are executed are invoked
181 * during installation of this callback. NOP if SMP=n or HOTPLUG_CPU=n.
182 */
183static inline int cpuhp_setup_state_nocalls(enum cpuhp_state state,
184 const char *name,
185 int (*startup)(unsigned int cpu),
186 int (*teardown)(unsigned int cpu))
187{
188 return __cpuhp_setup_state(state, name, false, startup, teardown,
189 false);
190}
191
192/**
193 * cpuhp_setup_state_multi - Add callbacks for multi state
194 * @state: The state for which the calls are installed
195 * @name: Name of the callback.
196 * @startup: startup callback function
197 * @teardown: teardown callback function
198 *
199 * Sets the internal multi_instance flag and prepares a state to work as a multi
200 * instance callback. No callbacks are invoked at this point. The callbacks are
201 * invoked once an instance for this state are registered via
202 * @cpuhp_state_add_instance or @cpuhp_state_add_instance_nocalls.
203 */
204static inline int cpuhp_setup_state_multi(enum cpuhp_state state,
205 const char *name,
206 int (*startup)(unsigned int cpu,
207 struct hlist_node *node),
208 int (*teardown)(unsigned int cpu,
209 struct hlist_node *node))
210{
211 return __cpuhp_setup_state(state, name, false,
212 (void *) startup,
213 (void *) teardown, true);
214}
215
216int __cpuhp_state_add_instance(enum cpuhp_state state, struct hlist_node *node,
217 bool invoke);
218
219/**
220 * cpuhp_state_add_instance - Add an instance for a state and invoke startup
221 * callback.
222 * @state: The state for which the instance is installed
223 * @node: The node for this individual state.
224 *
225 * Installs the instance for the @state and invokes the startup callback on
226 * the present cpus which have already reached the @state. The @state must have
227 * been earlier marked as multi-instance by @cpuhp_setup_state_multi.
228 */
229static inline int cpuhp_state_add_instance(enum cpuhp_state state,
230 struct hlist_node *node)
231{
232 return __cpuhp_state_add_instance(state, node, true);
233}
234
235/**
236 * cpuhp_state_add_instance_nocalls - Add an instance for a state without
237 * invoking the startup callback.
238 * @state: The state for which the instance is installed
239 * @node: The node for this individual state.
240 *
241 * Installs the instance for the @state The @state must have been earlier
242 * marked as multi-instance by @cpuhp_setup_state_multi.
243 */
244static inline int cpuhp_state_add_instance_nocalls(enum cpuhp_state state,
245 struct hlist_node *node)
246{
247 return __cpuhp_state_add_instance(state, node, false);
248}
249
250void __cpuhp_remove_state(enum cpuhp_state state, bool invoke);
251
252/**
253 * cpuhp_remove_state - Remove hotplug state callbacks and invoke the teardown
254 * @state: The state for which the calls are removed
255 *
256 * Removes the callback functions and invokes the teardown callback on
257 * the present cpus which have already reached the @state.
258 */
259static inline void cpuhp_remove_state(enum cpuhp_state state)
260{
261 __cpuhp_remove_state(state, true);
262}
263
264/**
265 * cpuhp_remove_state_nocalls - Remove hotplug state callbacks without invoking
266 * teardown
267 * @state: The state for which the calls are removed
268 */
269static inline void cpuhp_remove_state_nocalls(enum cpuhp_state state)
270{
271 __cpuhp_remove_state(state, false);
272}
273
274/**
275 * cpuhp_remove_multi_state - Remove hotplug multi state callback
276 * @state: The state for which the calls are removed
277 *
278 * Removes the callback functions from a multi state. This is the reverse of
279 * cpuhp_setup_state_multi(). All instances should have been removed before
280 * invoking this function.
281 */
282static inline void cpuhp_remove_multi_state(enum cpuhp_state state)
283{
284 __cpuhp_remove_state(state, false);
285}
286
287int __cpuhp_state_remove_instance(enum cpuhp_state state,
288 struct hlist_node *node, bool invoke);
289
290/**
291 * cpuhp_state_remove_instance - Remove hotplug instance from state and invoke
292 * the teardown callback
293 * @state: The state from which the instance is removed
294 * @node: The node for this individual state.
295 *
296 * Removes the instance and invokes the teardown callback on the present cpus
297 * which have already reached the @state.
298 */
299static inline int cpuhp_state_remove_instance(enum cpuhp_state state,
300 struct hlist_node *node)
301{
302 return __cpuhp_state_remove_instance(state, node, true);
303}
304
305/**
306 * cpuhp_state_remove_instance_nocalls - Remove hotplug instance from state
307 * without invoking the reatdown callback
308 * @state: The state from which the instance is removed
309 * @node: The node for this individual state.
310 *
311 * Removes the instance without invoking the teardown callback.
312 */
313static inline int cpuhp_state_remove_instance_nocalls(enum cpuhp_state state,
314 struct hlist_node *node)
315{
316 return __cpuhp_state_remove_instance(state, node, false);
317}
318
319#ifdef CONFIG_SMP
320void cpuhp_online_idle(enum cpuhp_state state);
321#else
322static inline void cpuhp_online_idle(enum cpuhp_state state) { }
323#endif
324
325#endif