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