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Diffstat (limited to '')
| -rw-r--r-- | arch/x86/include/asm/cpumask.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/arch/x86/include/asm/cpumask.h b/arch/x86/include/asm/cpumask.h new file mode 100644 index 000000000..c5aed9e92 --- /dev/null +++ b/arch/x86/include/asm/cpumask.h @@ -0,0 +1,43 @@ +/* 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 */ |