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