1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _ASM_X86_CPU_H 3#define _ASM_X86_CPU_H 4 5#include <linux/device.h> 6#include <linux/cpu.h> 7#include <linux/topology.h> 8#include <linux/nodemask.h> 9#include <linux/percpu.h> 10 11#ifdef CONFIG_SMP 12 13extern void prefill_possible_map(void); 14 15#else /* CONFIG_SMP */ 16 17static inline void prefill_possible_map(void) {} 18 19#define cpu_physical_id(cpu) boot_cpu_physical_apicid 20#define cpu_acpi_id(cpu) 0 21#define safe_smp_processor_id() 0 22 23#endif /* CONFIG_SMP */ 24 25struct x86_cpu { 26 struct cpu cpu; 27}; 28 29#ifdef CONFIG_HOTPLUG_CPU 30extern int arch_register_cpu(int num); 31extern void arch_unregister_cpu(int); 32extern void start_cpu0(void); 33#ifdef CONFIG_DEBUG_HOTPLUG_CPU0 34extern int _debug_hotplug_cpu(int cpu, int action); 35#endif 36#endif 37 38int mwait_usable(const struct cpuinfo_x86 *); 39 40unsigned int x86_family(unsigned int sig); 41unsigned int x86_model(unsigned int sig); 42unsigned int x86_stepping(unsigned int sig); 43#ifdef CONFIG_CPU_SUP_INTEL 44extern void __init sld_setup(struct cpuinfo_x86 *c); 45extern void switch_to_sld(unsigned long tifn); 46extern bool handle_user_split_lock(struct pt_regs *regs, long error_code); 47extern bool handle_guest_split_lock(unsigned long ip); 48extern void handle_bus_lock(struct pt_regs *regs); 49u8 get_this_hybrid_cpu_type(void); 50#else 51static inline void __init sld_setup(struct cpuinfo_x86 *c) {} 52static inline void switch_to_sld(unsigned long tifn) {} 53static inline bool handle_user_split_lock(struct pt_regs *regs, long error_code) 54{ 55 return false; 56} 57 58static inline bool handle_guest_split_lock(unsigned long ip) 59{ 60 return false; 61} 62 63static inline void handle_bus_lock(struct pt_regs *regs) {} 64 65static inline u8 get_this_hybrid_cpu_type(void) 66{ 67 return 0; 68} 69#endif 70#ifdef CONFIG_IA32_FEAT_CTL 71void init_ia32_feat_ctl(struct cpuinfo_x86 *c); 72#else 73static inline void init_ia32_feat_ctl(struct cpuinfo_x86 *c) {} 74#endif 75#endif /* _ASM_X86_CPU_H */ 76