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 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(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(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 /* __ASSEMBLY__ */ 38#endif /* _ASM_X86_CPUMASK_H */ 39