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#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 soft_restart_cpu(void);
34#endif
35
36extern void ap_init_aperfmperf(void);
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 bool handle_user_split_lock(struct pt_regs *regs, long error_code);
46extern bool handle_guest_split_lock(unsigned long ip);
47extern void handle_bus_lock(struct pt_regs *regs);
48u8 get_this_hybrid_cpu_type(void);
49#else
50static inline void __init sld_setup(struct cpuinfo_x86 *c) {}
51static inline bool handle_user_split_lock(struct pt_regs *regs, long error_code)
52{
53 return false;
54}
55
56static inline bool handle_guest_split_lock(unsigned long ip)
57{
58 return false;
59}
60
61static inline void handle_bus_lock(struct pt_regs *regs) {}
62
63static inline u8 get_this_hybrid_cpu_type(void)
64{
65 return 0;
66}
67#endif
68#ifdef CONFIG_IA32_FEAT_CTL
69void init_ia32_feat_ctl(struct cpuinfo_x86 *c);
70#else
71static inline void init_ia32_feat_ctl(struct cpuinfo_x86 *c) {}
72#endif
73
74extern __noendbr void cet_disable(void);
75
76struct ucode_cpu_info;
77
78int intel_cpu_collect_info(struct ucode_cpu_info *uci);
79
80static inline bool intel_cpu_signatures_match(unsigned int s1, unsigned int p1,
81 unsigned int s2, unsigned int p2)
82{
83 if (s1 != s2)
84 return false;
85
86 /* Processor flags are either both 0 ... */
87 if (!p1 && !p2)
88 return true;
89
90 /* ... or they intersect. */
91 return p1 & p2;
92}
93
94extern u64 x86_read_arch_cap_msr(void);
95int intel_find_matching_signature(void *mc, unsigned int csig, int cpf);
96int intel_microcode_sanity_check(void *mc, bool print_err, int hdr_type);
97
98extern struct cpumask cpus_stop_mask;
99
100#endif /* _ASM_X86_CPU_H */