Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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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_UNCORE_PREP,
12 CPUHP_PERF_X86_AMD_UNCORE_PREP,
13 CPUHP_PERF_X86_RAPL_PREP,
14 CPUHP_PERF_BFIN,
15 CPUHP_PERF_POWER,
16 CPUHP_PERF_SUPERH,
17 CPUHP_X86_HPET_DEAD,
18 CPUHP_X86_APB_DEAD,
19 CPUHP_WORKQUEUE_PREP,
20 CPUHP_POWER_NUMA_PREPARE,
21 CPUHP_HRTIMERS_PREPARE,
22 CPUHP_PROFILE_PREPARE,
23 CPUHP_X2APIC_PREPARE,
24 CPUHP_SMPCFD_PREPARE,
25 CPUHP_RCUTREE_PREP,
26 CPUHP_NOTIFY_PREPARE,
27 CPUHP_TIMERS_DEAD,
28 CPUHP_BRINGUP_CPU,
29 CPUHP_AP_IDLE_DEAD,
30 CPUHP_AP_OFFLINE,
31 CPUHP_AP_SCHED_STARTING,
32 CPUHP_AP_RCUTREE_DYING,
33 CPUHP_AP_IRQ_GIC_STARTING,
34 CPUHP_AP_IRQ_GICV3_STARTING,
35 CPUHP_AP_IRQ_HIP04_STARTING,
36 CPUHP_AP_IRQ_ARMADA_XP_STARTING,
37 CPUHP_AP_IRQ_ARMADA_CASC_STARTING,
38 CPUHP_AP_IRQ_BCM2836_STARTING,
39 CPUHP_AP_ARM_MVEBU_COHERENCY,
40 CPUHP_AP_PERF_X86_UNCORE_STARTING,
41 CPUHP_AP_PERF_X86_AMD_UNCORE_STARTING,
42 CPUHP_AP_PERF_X86_STARTING,
43 CPUHP_AP_PERF_X86_AMD_IBS_STARTING,
44 CPUHP_AP_PERF_X86_CQM_STARTING,
45 CPUHP_AP_PERF_X86_CSTATE_STARTING,
46 CPUHP_AP_PERF_XTENSA_STARTING,
47 CPUHP_AP_PERF_METAG_STARTING,
48 CPUHP_AP_MIPS_OP_LOONGSON3_STARTING,
49 CPUHP_AP_ARM_VFP_STARTING,
50 CPUHP_AP_PERF_ARM_STARTING,
51 CPUHP_AP_ARM_L2X0_STARTING,
52 CPUHP_AP_ARM_ARCH_TIMER_STARTING,
53 CPUHP_AP_ARM_GLOBAL_TIMER_STARTING,
54 CPUHP_AP_DUMMY_TIMER_STARTING,
55 CPUHP_AP_EXYNOS4_MCT_TIMER_STARTING,
56 CPUHP_AP_ARM_TWD_STARTING,
57 CPUHP_AP_METAG_TIMER_STARTING,
58 CPUHP_AP_QCOM_TIMER_STARTING,
59 CPUHP_AP_ARMADA_TIMER_STARTING,
60 CPUHP_AP_MARCO_TIMER_STARTING,
61 CPUHP_AP_MIPS_GIC_TIMER_STARTING,
62 CPUHP_AP_ARC_TIMER_STARTING,
63 CPUHP_AP_KVM_STARTING,
64 CPUHP_AP_KVM_ARM_VGIC_INIT_STARTING,
65 CPUHP_AP_KVM_ARM_VGIC_STARTING,
66 CPUHP_AP_KVM_ARM_TIMER_STARTING,
67 CPUHP_AP_ARM_XEN_STARTING,
68 CPUHP_AP_ARM_CORESIGHT_STARTING,
69 CPUHP_AP_ARM_CORESIGHT4_STARTING,
70 CPUHP_AP_ARM64_ISNDEP_STARTING,
71 CPUHP_AP_SMPCFD_DYING,
72 CPUHP_AP_X86_TBOOT_DYING,
73 CPUHP_AP_NOTIFY_STARTING,
74 CPUHP_AP_ONLINE,
75 CPUHP_TEARDOWN_CPU,
76 CPUHP_AP_ONLINE_IDLE,
77 CPUHP_AP_SMPBOOT_THREADS,
78 CPUHP_AP_X86_VDSO_VMA_ONLINE,
79 CPUHP_AP_PERF_ONLINE,
80 CPUHP_AP_PERF_X86_ONLINE,
81 CPUHP_AP_PERF_X86_UNCORE_ONLINE,
82 CPUHP_AP_PERF_X86_AMD_UNCORE_ONLINE,
83 CPUHP_AP_PERF_X86_AMD_POWER_ONLINE,
84 CPUHP_AP_PERF_X86_RAPL_ONLINE,
85 CPUHP_AP_PERF_X86_CQM_ONLINE,
86 CPUHP_AP_PERF_X86_CSTATE_ONLINE,
87 CPUHP_AP_PERF_S390_CF_ONLINE,
88 CPUHP_AP_PERF_S390_SF_ONLINE,
89 CPUHP_AP_PERF_ARM_CCI_ONLINE,
90 CPUHP_AP_PERF_ARM_CCN_ONLINE,
91 CPUHP_AP_WORKQUEUE_ONLINE,
92 CPUHP_AP_RCUTREE_ONLINE,
93 CPUHP_AP_NOTIFY_ONLINE,
94 CPUHP_AP_ONLINE_DYN,
95 CPUHP_AP_ONLINE_DYN_END = CPUHP_AP_ONLINE_DYN + 30,
96 CPUHP_AP_X86_HPET_ONLINE,
97 CPUHP_AP_X86_KVM_CLK_ONLINE,
98 CPUHP_AP_ACTIVE,
99 CPUHP_ONLINE,
100};
101
102int __cpuhp_setup_state(enum cpuhp_state state, const char *name, bool invoke,
103 int (*startup)(unsigned int cpu),
104 int (*teardown)(unsigned int cpu));
105
106/**
107 * cpuhp_setup_state - Setup hotplug state callbacks with calling the callbacks
108 * @state: The state for which the calls are installed
109 * @name: Name of the callback (will be used in debug output)
110 * @startup: startup callback function
111 * @teardown: teardown callback function
112 *
113 * Installs the callback functions and invokes the startup callback on
114 * the present cpus which have already reached the @state.
115 */
116static inline int cpuhp_setup_state(enum cpuhp_state state,
117 const char *name,
118 int (*startup)(unsigned int cpu),
119 int (*teardown)(unsigned int cpu))
120{
121 return __cpuhp_setup_state(state, name, true, startup, teardown);
122}
123
124/**
125 * cpuhp_setup_state_nocalls - Setup hotplug state callbacks without calling the
126 * callbacks
127 * @state: The state for which the calls are installed
128 * @name: Name of the callback.
129 * @startup: startup callback function
130 * @teardown: teardown callback function
131 *
132 * Same as @cpuhp_setup_state except that no calls are executed are invoked
133 * during installation of this callback. NOP if SMP=n or HOTPLUG_CPU=n.
134 */
135static inline int cpuhp_setup_state_nocalls(enum cpuhp_state state,
136 const char *name,
137 int (*startup)(unsigned int cpu),
138 int (*teardown)(unsigned int cpu))
139{
140 return __cpuhp_setup_state(state, name, false, startup, teardown);
141}
142
143void __cpuhp_remove_state(enum cpuhp_state state, bool invoke);
144
145/**
146 * cpuhp_remove_state - Remove hotplug state callbacks and invoke the teardown
147 * @state: The state for which the calls are removed
148 *
149 * Removes the callback functions and invokes the teardown callback on
150 * the present cpus which have already reached the @state.
151 */
152static inline void cpuhp_remove_state(enum cpuhp_state state)
153{
154 __cpuhp_remove_state(state, true);
155}
156
157/**
158 * cpuhp_remove_state_nocalls - Remove hotplug state callbacks without invoking
159 * teardown
160 * @state: The state for which the calls are removed
161 */
162static inline void cpuhp_remove_state_nocalls(enum cpuhp_state state)
163{
164 __cpuhp_remove_state(state, false);
165}
166
167#ifdef CONFIG_SMP
168void cpuhp_online_idle(enum cpuhp_state state);
169#else
170static inline void cpuhp_online_idle(enum cpuhp_state state) { }
171#endif
172
173#endif