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 13 extern void prefill_possible_map(void); 14 15 #else /* CONFIG_SMP */ 16 17 static 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 25 struct x86_cpu { 26 struct cpu cpu; 27 }; 28 29 #ifdef CONFIG_HOTPLUG_CPU 30 extern int arch_register_cpu(int num); 31 extern void arch_unregister_cpu(int); 32 extern void start_cpu0(void); 33 #ifdef CONFIG_DEBUG_HOTPLUG_CPU0 34 extern int _debug_hotplug_cpu(int cpu, int action); 35 #endif 36 #endif 37 38 int mwait_usable(const struct cpuinfo_x86 *); 39 40 unsigned int x86_family(unsigned int sig); 41 unsigned int x86_model(unsigned int sig); 42 unsigned int x86_stepping(unsigned int sig); 43 #ifdef CONFIG_CPU_SUP_INTEL 44 extern void __init sld_setup(struct cpuinfo_x86 *c); 45 extern void switch_to_sld(unsigned long tifn); 46 extern bool handle_user_split_lock(struct pt_regs *regs, long error_code); 47 extern bool handle_guest_split_lock(unsigned long ip); 48 extern void handle_bus_lock(struct pt_regs *regs); 49 u8 get_this_hybrid_cpu_type(void); 50 #else 51 static inline void __init sld_setup(struct cpuinfo_x86 *c) {} 52 static inline void switch_to_sld(unsigned long tifn) {} 53 static inline bool handle_user_split_lock(struct pt_regs *regs, long error_code) 54 { 55 return false; 56 } 57 58 static inline bool handle_guest_split_lock(unsigned long ip) 59 { 60 return false; 61 } 62 63 static inline void handle_bus_lock(struct pt_regs *regs) {} 64 65 static inline u8 get_this_hybrid_cpu_type(void) 66 { 67 return 0; 68 } 69 #endif 70 #ifdef CONFIG_IA32_FEAT_CTL 71 void init_ia32_feat_ctl(struct cpuinfo_x86 *c); 72 #else 73 static inline void init_ia32_feat_ctl(struct cpuinfo_x86 *c) {} 74 #endif 75 #endif /* _ASM_X86_CPU_H */ 76