1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _LINUX_CPU_SMT_H_ |
3 | #define _LINUX_CPU_SMT_H_ |
4 | |
5 | enum 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) |
14 | extern enum cpuhp_smt_control cpu_smt_control; |
15 | extern unsigned int cpu_smt_num_threads; |
16 | extern void cpu_smt_disable(bool force); |
17 | extern void cpu_smt_set_num_threads(unsigned int num_threads, |
18 | unsigned int max_threads); |
19 | extern bool cpu_smt_possible(void); |
20 | extern int cpuhp_smt_enable(void); |
21 | extern 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 |
25 | static inline void cpu_smt_disable(bool force) { } |
26 | static inline void cpu_smt_set_num_threads(unsigned int num_threads, |
27 | unsigned int max_threads) { } |
28 | static inline bool cpu_smt_possible(void) { return false; } |
29 | static inline int cpuhp_smt_enable(void) { return 0; } |
30 | static inline int cpuhp_smt_disable(enum cpuhp_smt_control ctrlval) { return 0; } |
31 | #endif |
32 | |
33 | #endif /* _LINUX_CPU_SMT_H_ */ |
34 | |