Linux kernel mirror (for testing)
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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 */