| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | #ifndef _LINUX_CPU_SMT_H_ |
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| 3 | #define _LINUX_CPU_SMT_H_ |
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| 4 | |
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| 5 | enum cpuhp_smt_control { |
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| 6 | CPU_SMT_ENABLED, |
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| 7 | CPU_SMT_DISABLED, |
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| 8 | CPU_SMT_FORCE_DISABLED, |
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| 9 | CPU_SMT_NOT_SUPPORTED, |
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| 10 | CPU_SMT_NOT_IMPLEMENTED, |
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| 11 | }; |
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| 12 | |
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| 13 | #if defined(CONFIG_SMP) && defined(CONFIG_HOTPLUG_SMT) |
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| 14 | extern enum cpuhp_smt_control cpu_smt_control; |
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| 15 | extern unsigned int cpu_smt_num_threads; |
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| 16 | extern void cpu_smt_disable(bool force); |
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| 17 | extern void cpu_smt_set_num_threads(unsigned int num_threads, |
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| 18 | unsigned int max_threads); |
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| 19 | extern bool cpu_smt_possible(void); |
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| 20 | extern int cpuhp_smt_enable(void); |
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| 21 | extern int cpuhp_smt_disable(enum cpuhp_smt_control ctrlval); |
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| 22 | #else |
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| 23 | # define cpu_smt_control (CPU_SMT_NOT_IMPLEMENTED) |
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| 24 | # define cpu_smt_num_threads 1 |
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| 25 | static inline void cpu_smt_disable(bool force) { } |
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| 26 | static inline void cpu_smt_set_num_threads(unsigned int num_threads, |
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| 27 | unsigned int max_threads) { } |
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| 28 | static inline bool cpu_smt_possible(void) { return false; } |
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| 29 | static inline int cpuhp_smt_enable(void) { return 0; } |
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| 30 | static inline int cpuhp_smt_disable(enum cpuhp_smt_control ctrlval) { return 0; } |
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| 31 | #endif |
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| 32 | |
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| 33 | #endif /* _LINUX_CPU_SMT_H_ */ |
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| 34 | |
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