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 #ifndef CONFIG_SMP
13 #define cpu_physical_id(cpu)			boot_cpu_physical_apicid
14 #define cpu_acpi_id(cpu)			0
15 #endif /* CONFIG_SMP */
16 
17 #ifdef CONFIG_HOTPLUG_CPU
18 extern void soft_restart_cpu(void);
19 #endif
20 
21 extern void ap_init_aperfmperf(void);
22 
23 int mwait_usable(const struct cpuinfo_x86 *);
24 
25 unsigned int x86_family(unsigned int sig);
26 unsigned int x86_model(unsigned int sig);
27 unsigned int x86_stepping(unsigned int sig);
28 #ifdef CONFIG_X86_BUS_LOCK_DETECT
29 extern void __init sld_setup(struct cpuinfo_x86 *c);
30 extern bool handle_user_split_lock(struct pt_regs *regs, long error_code);
31 extern bool handle_guest_split_lock(unsigned long ip);
32 extern void handle_bus_lock(struct pt_regs *regs);
33 void split_lock_init(void);
34 void bus_lock_init(void);
35 #else
sld_setup(struct cpuinfo_x86 * c)36 static inline void __init sld_setup(struct cpuinfo_x86 *c) {}
handle_user_split_lock(struct pt_regs * regs,long error_code)37 static inline bool handle_user_split_lock(struct pt_regs *regs, long error_code)
38 {
39 	return false;
40 }
41 
handle_guest_split_lock(unsigned long ip)42 static inline bool handle_guest_split_lock(unsigned long ip)
43 {
44 	return false;
45 }
46 
handle_bus_lock(struct pt_regs * regs)47 static inline void handle_bus_lock(struct pt_regs *regs) {}
split_lock_init(void)48 static inline void split_lock_init(void) {}
bus_lock_init(void)49 static inline void bus_lock_init(void) {}
50 #endif
51 
52 #ifdef CONFIG_IA32_FEAT_CTL
53 void init_ia32_feat_ctl(struct cpuinfo_x86 *c);
54 #else
init_ia32_feat_ctl(struct cpuinfo_x86 * c)55 static inline void init_ia32_feat_ctl(struct cpuinfo_x86 *c) {}
56 #endif
57 
58 extern __noendbr void cet_disable(void);
59 
60 struct cpu_signature;
61 
62 void intel_collect_cpu_info(struct cpu_signature *sig);
63 
64 extern u64 x86_read_arch_cap_msr(void);
65 bool intel_find_matching_signature(void *mc, struct cpu_signature *sig);
66 int intel_microcode_sanity_check(void *mc, bool print_err, int hdr_type);
67 
68 extern struct cpumask cpus_stop_mask;
69 
70 #endif /* _ASM_X86_CPU_H */
71