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- /* SPDX-License-Identifier: GPL-2.0 */
- #ifndef _ASM_X86_CPUMASK_H
- #define _ASM_X86_CPUMASK_H
- #ifndef __ASSEMBLY__
- #include <linux/cpumask.h>
- extern cpumask_var_t cpu_callin_mask;
- extern cpumask_var_t cpu_callout_mask;
- extern cpumask_var_t cpu_initialized_mask;
- extern cpumask_var_t cpu_sibling_setup_mask;
- extern void setup_cpu_local_masks(void);
- /*
- * NMI and MCE exceptions need cpu_is_offline() _really_ early,
- * provide an arch_ special for them to avoid instrumentation.
- */
- #if NR_CPUS > 1
- static __always_inline bool arch_cpu_online(int cpu)
- {
- return arch_test_bit(cpu, cpumask_bits(cpu_online_mask));
- }
- static __always_inline void arch_cpumask_clear_cpu(int cpu, struct cpumask *dstp)
- {
- arch_clear_bit(cpumask_check(cpu), cpumask_bits(dstp));
- }
- #else
- static __always_inline bool arch_cpu_online(int cpu)
- {
- return cpu == 0;
- }
- static __always_inline void arch_cpumask_clear_cpu(int cpu, struct cpumask *dstp)
- {
- return;
- }
- #endif
- #define arch_cpu_is_offline(cpu) unlikely(!arch_cpu_online(cpu))
- #endif /* __ASSEMBLY__ */
- #endif /* _ASM_X86_CPUMASK_H */
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