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#include <asm/ibt.h>
11
12#ifdef CONFIG_SMP
13
14extern void prefill_possible_map(void);
15
16#else /* CONFIG_SMP */
17
18static inline void prefill_possible_map(void) {}
19
20#define cpu_physical_id(cpu) boot_cpu_physical_apicid
21#define cpu_acpi_id(cpu) 0
22#define safe_smp_processor_id() 0
23
24#endif /* CONFIG_SMP */
25
26struct x86_cpu {
27 struct cpu cpu;
28};
29
30#ifdef CONFIG_HOTPLUG_CPU
31extern int arch_register_cpu(int num);
32extern void arch_unregister_cpu(int);
33extern void start_cpu0(void);
34#ifdef CONFIG_DEBUG_HOTPLUG_CPU0
35extern int _debug_hotplug_cpu(int cpu, int action);
36#endif
37#endif
38
39extern void ap_init_aperfmperf(void);
40
41int mwait_usable(const struct cpuinfo_x86 *);
42
43unsigned int x86_family(unsigned int sig);
44unsigned int x86_model(unsigned int sig);
45unsigned int x86_stepping(unsigned int sig);
46#ifdef CONFIG_CPU_SUP_INTEL
47extern void __init sld_setup(struct cpuinfo_x86 *c);
48extern bool handle_user_split_lock(struct pt_regs *regs, long error_code);
49extern bool handle_guest_split_lock(unsigned long ip);
50extern void handle_bus_lock(struct pt_regs *regs);
51u8 get_this_hybrid_cpu_type(void);
52#else
53static inline void __init sld_setup(struct cpuinfo_x86 *c) {}
54static inline bool handle_user_split_lock(struct pt_regs *regs, long error_code)
55{
56 return false;
57}
58
59static inline bool handle_guest_split_lock(unsigned long ip)
60{
61 return false;
62}
63
64static inline void handle_bus_lock(struct pt_regs *regs) {}
65
66static inline u8 get_this_hybrid_cpu_type(void)
67{
68 return 0;
69}
70#endif
71#ifdef CONFIG_IA32_FEAT_CTL
72void init_ia32_feat_ctl(struct cpuinfo_x86 *c);
73#else
74static inline void init_ia32_feat_ctl(struct cpuinfo_x86 *c) {}
75#endif
76
77extern __noendbr void cet_disable(void);
78
79struct ucode_cpu_info;
80
81int intel_cpu_collect_info(struct ucode_cpu_info *uci);
82
83static inline bool intel_cpu_signatures_match(unsigned int s1, unsigned int p1,
84 unsigned int s2, unsigned int p2)
85{
86 if (s1 != s2)
87 return false;
88
89 /* Processor flags are either both 0 ... */
90 if (!p1 && !p2)
91 return true;
92
93 /* ... or they intersect. */
94 return p1 & p2;
95}
96
97extern u64 x86_read_arch_cap_msr(void);
98int intel_find_matching_signature(void *mc, unsigned int csig, int cpf);
99int intel_microcode_sanity_check(void *mc, bool print_err, int hdr_type);
100
101#endif /* _ASM_X86_CPU_H */
102

source code of linux/arch/x86/include/asm/cpu.h