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(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(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