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