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 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 void soft_restart_cpu(void); 32 #endif 33 34 extern void ap_init_aperfmperf(void); 35 36 int mwait_usable(const struct cpuinfo_x86 *); 37 38 unsigned int x86_family(unsigned int sig); 39 unsigned int x86_model(unsigned int sig); 40 unsigned int x86_stepping(unsigned int sig); 41 #ifdef CONFIG_CPU_SUP_INTEL 42 extern void __init sld_setup(struct cpuinfo_x86 *c); 43 extern bool handle_user_split_lock(struct pt_regs *regs, long error_code); 44 extern bool handle_guest_split_lock(unsigned long ip); 45 extern void handle_bus_lock(struct pt_regs *regs); 46 u8 get_this_hybrid_cpu_type(void); 47 #else 48 static inline void __init sld_setup(struct cpuinfo_x86 *c) {} 49 static inline bool handle_user_split_lock(struct pt_regs *regs, long error_code) 50 { 51 return false; 52 } 53 54 static inline bool handle_guest_split_lock(unsigned long ip) 55 { 56 return false; 57 } 58 59 static inline void handle_bus_lock(struct pt_regs *regs) {} 60 61 static inline u8 get_this_hybrid_cpu_type(void) 62 { 63 return 0; 64 } 65 #endif 66 #ifdef CONFIG_IA32_FEAT_CTL 67 void init_ia32_feat_ctl(struct cpuinfo_x86 *c); 68 #else 69 static inline void init_ia32_feat_ctl(struct cpuinfo_x86 *c) {} 70 #endif 71 72 extern __noendbr void cet_disable(void); 73 74 struct ucode_cpu_info; 75 76 int intel_cpu_collect_info(struct ucode_cpu_info *uci); 77 78 static inline bool intel_cpu_signatures_match(unsigned int s1, unsigned int p1, 79 unsigned int s2, unsigned int p2) 80 { 81 if (s1 != s2) 82 return false; 83 84 /* Processor flags are either both 0 ... */ 85 if (!p1 && !p2) 86 return true; 87 88 /* ... or they intersect. */ 89 return p1 & p2; 90 } 91 92 extern u64 x86_read_arch_cap_msr(void); 93 int intel_find_matching_signature(void *mc, unsigned int csig, int cpf); 94 int intel_microcode_sanity_check(void *mc, bool print_err, int hdr_type); 95 96 extern struct cpumask cpus_stop_mask; 97 98 #endif /* _ASM_X86_CPU_H */ 99