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