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 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 |
14 | static __always_inline bool arch_cpu_online(int cpu) |
15 | { |
16 | return arch_test_bit(nr: cpu, cpumask_bits(cpu_online_mask)); |
17 | } |
18 | |
19 | static __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 |
24 | static __always_inline bool arch_cpu_online(int cpu) |
25 | { |
26 | return cpu == 0; |
27 | } |
28 | |
29 | static __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 /* __ASSEMBLY__ */ |
38 | #endif /* _ASM_X86_CPUMASK_H */ |
39 | |