8dbce53cc2
Cpu hotplug (offline) without dlpar operation will place cpu in cede state and the extended_cede_processor() function will return when resumed. Kernel stack pointer needs to be reset before start_secondary() is called to continue the online operation. Added new function start_secondary_resume() to do the above steps. Signed-off-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> Cc: Gautham R Shenoy <ego@in.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
39 lines
965 B
C
39 lines
965 B
C
#ifndef _OFFLINE_STATES_H_
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#define _OFFLINE_STATES_H_
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/* Cpu offline states go here */
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enum cpu_state_vals {
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CPU_STATE_OFFLINE,
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CPU_STATE_INACTIVE,
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CPU_STATE_ONLINE,
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CPU_MAX_OFFLINE_STATES
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};
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#ifdef CONFIG_HOTPLUG_CPU
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extern enum cpu_state_vals get_cpu_current_state(int cpu);
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extern void set_cpu_current_state(int cpu, enum cpu_state_vals state);
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extern void set_preferred_offline_state(int cpu, enum cpu_state_vals state);
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extern void set_default_offline_state(int cpu);
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#else
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static inline enum cpu_state_vals get_cpu_current_state(int cpu)
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{
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return CPU_STATE_ONLINE;
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}
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static inline void set_cpu_current_state(int cpu, enum cpu_state_vals state)
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{
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}
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static inline void set_preferred_offline_state(int cpu, enum cpu_state_vals state)
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{
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}
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static inline void set_default_offline_state(int cpu)
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{
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}
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#endif
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extern enum cpu_state_vals get_preferred_offline_state(int cpu);
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extern int start_secondary(void);
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extern void start_secondary_resume(void);
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#endif
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