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 cpumask_var_t cpu_callin_mask; 8 extern cpumask_var_t cpu_callout_mask; 9 extern cpumask_var_t cpu_initialized_mask; 10 extern cpumask_var_t cpu_sibling_setup_mask; 11 12 extern void setup_cpu_local_masks(void); 13 14 /* 15 * NMI and MCE exceptions need cpu_is_offline() _really_ early, 16 * provide an arch_ special for them to avoid instrumentation. 17 */ 18 #if NR_CPUS > 1 19 static __always_inline bool arch_cpu_online(int cpu) 20 { 21 return arch_test_bit(cpu, cpumask_bits(cpu_online_mask)); 22 } 23 24 static __always_inline void arch_cpumask_clear_cpu(int cpu, struct cpumask *dstp) 25 { 26 arch_clear_bit(cpumask_check(cpu), cpumask_bits(dstp)); 27 } 28 #else 29 static __always_inline bool arch_cpu_online(int cpu) 30 { 31 return cpu == 0; 32 } 33 34 static __always_inline void arch_cpumask_clear_cpu(int cpu, struct cpumask *dstp) 35 { 36 return; 37 } 38 #endif 39 40 #define arch_cpu_is_offline(cpu) unlikely(!arch_cpu_online(cpu)) 41 42 #endif /* __ASSEMBLY__ */ 43 #endif /* _ASM_X86_CPUMASK_H */ 44