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
14 extern void prefill_possible_map(void);
15
16 #else /* CONFIG_SMP */
17
prefill_possible_map(void)18 static 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
26 struct x86_cpu {
27 struct cpu cpu;
28 };
29
30 #ifdef CONFIG_HOTPLUG_CPU
31 extern int arch_register_cpu(int num);
32 extern void arch_unregister_cpu(int);
33 extern void start_cpu0(void);
34 #ifdef CONFIG_DEBUG_HOTPLUG_CPU0
35 extern int _debug_hotplug_cpu(int cpu, int action);
36 #endif
37 #endif
38
39 extern void ap_init_aperfmperf(void);
40
41 int mwait_usable(const struct cpuinfo_x86 *);
42
43 unsigned int x86_family(unsigned int sig);
44 unsigned int x86_model(unsigned int sig);
45 unsigned int x86_stepping(unsigned int sig);
46 #ifdef CONFIG_CPU_SUP_INTEL
47 extern void __init sld_setup(struct cpuinfo_x86 *c);
48 extern bool handle_user_split_lock(struct pt_regs *regs, long error_code);
49 extern bool handle_guest_split_lock(unsigned long ip);
50 extern void handle_bus_lock(struct pt_regs *regs);
51 u8 get_this_hybrid_cpu_type(void);
52 #else
sld_setup(struct cpuinfo_x86 * c)53 static inline void __init sld_setup(struct cpuinfo_x86 *c) {}
handle_user_split_lock(struct pt_regs * regs,long error_code)54 static inline bool handle_user_split_lock(struct pt_regs *regs, long error_code)
55 {
56 return false;
57 }
58
handle_guest_split_lock(unsigned long ip)59 static inline bool handle_guest_split_lock(unsigned long ip)
60 {
61 return false;
62 }
63
handle_bus_lock(struct pt_regs * regs)64 static inline void handle_bus_lock(struct pt_regs *regs) {}
65
get_this_hybrid_cpu_type(void)66 static inline u8 get_this_hybrid_cpu_type(void)
67 {
68 return 0;
69 }
70 #endif
71 #ifdef CONFIG_IA32_FEAT_CTL
72 void init_ia32_feat_ctl(struct cpuinfo_x86 *c);
73 #else
init_ia32_feat_ctl(struct cpuinfo_x86 * c)74 static inline void init_ia32_feat_ctl(struct cpuinfo_x86 *c) {}
75 #endif
76
77 extern __noendbr void cet_disable(void);
78
79 struct ucode_cpu_info;
80
81 int intel_cpu_collect_info(struct ucode_cpu_info *uci);
82
intel_cpu_signatures_match(unsigned int s1,unsigned int p1,unsigned int s2,unsigned int p2)83 static 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
97 extern u64 x86_read_arch_cap_msr(void);
98 int intel_find_matching_signature(void *mc, unsigned int csig, int cpf);
99 int intel_microcode_sanity_check(void *mc, bool print_err, int hdr_type);
100
101 #endif /* _ASM_X86_CPU_H */
102