1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_X86_CPUMASK_H
3 #define _ASM_X86_CPUMASK_H
4 #ifndef __ASSEMBLY__
5 #include <linux/cpumask.h>
6 
7 extern cpumask_var_t cpu_callin_mask;
8 extern cpumask_var_t cpu_callout_mask;
9 extern cpumask_var_t cpu_initialized_mask;
10 extern cpumask_var_t cpu_sibling_setup_mask;
11 
12 extern void setup_cpu_local_masks(void);
13 
14 /*
15  * NMI and MCE exceptions need cpu_is_offline() _really_ early,
16  * provide an arch_ special for them to avoid instrumentation.
17  */
18 #if NR_CPUS > 1
arch_cpu_online(int cpu)19 static __always_inline bool arch_cpu_online(int cpu)
20 {
21 	return arch_test_bit(cpu, cpumask_bits(cpu_online_mask));
22 }
23 
arch_cpumask_clear_cpu(int cpu,struct cpumask * dstp)24 static __always_inline void arch_cpumask_clear_cpu(int cpu, struct cpumask *dstp)
25 {
26 	arch_clear_bit(cpumask_check(cpu), cpumask_bits(dstp));
27 }
28 #else
arch_cpu_online(int cpu)29 static __always_inline bool arch_cpu_online(int cpu)
30 {
31 	return cpu == 0;
32 }
33 
arch_cpumask_clear_cpu(int cpu,struct cpumask * dstp)34 static __always_inline void arch_cpumask_clear_cpu(int cpu, struct cpumask *dstp)
35 {
36 	return;
37 }
38 #endif
39 
40 #define arch_cpu_is_offline(cpu)	unlikely(!arch_cpu_online(cpu))
41 
42 #endif /* __ASSEMBLY__ */
43 #endif /* _ASM_X86_CPUMASK_H */
44