1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun #ifndef _ASM_X86_CPU_H 3*4882a593Smuzhiyun #define _ASM_X86_CPU_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #include <linux/device.h> 6*4882a593Smuzhiyun #include <linux/cpu.h> 7*4882a593Smuzhiyun #include <linux/topology.h> 8*4882a593Smuzhiyun #include <linux/nodemask.h> 9*4882a593Smuzhiyun #include <linux/percpu.h> 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun #ifdef CONFIG_SMP 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun extern void prefill_possible_map(void); 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun #else /* CONFIG_SMP */ 16*4882a593Smuzhiyun prefill_possible_map(void)17*4882a593Smuzhiyunstatic inline void prefill_possible_map(void) {} 18*4882a593Smuzhiyun 19*4882a593Smuzhiyun #define cpu_physical_id(cpu) boot_cpu_physical_apicid 20*4882a593Smuzhiyun #define cpu_acpi_id(cpu) 0 21*4882a593Smuzhiyun #define safe_smp_processor_id() 0 22*4882a593Smuzhiyun 23*4882a593Smuzhiyun #endif /* CONFIG_SMP */ 24*4882a593Smuzhiyun 25*4882a593Smuzhiyun struct x86_cpu { 26*4882a593Smuzhiyun struct cpu cpu; 27*4882a593Smuzhiyun }; 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun #ifdef CONFIG_HOTPLUG_CPU 30*4882a593Smuzhiyun extern int arch_register_cpu(int num); 31*4882a593Smuzhiyun extern void arch_unregister_cpu(int); 32*4882a593Smuzhiyun extern void start_cpu0(void); 33*4882a593Smuzhiyun #ifdef CONFIG_DEBUG_HOTPLUG_CPU0 34*4882a593Smuzhiyun extern int _debug_hotplug_cpu(int cpu, int action); 35*4882a593Smuzhiyun #endif 36*4882a593Smuzhiyun #endif 37*4882a593Smuzhiyun 38*4882a593Smuzhiyun int mwait_usable(const struct cpuinfo_x86 *); 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun unsigned int x86_family(unsigned int sig); 41*4882a593Smuzhiyun unsigned int x86_model(unsigned int sig); 42*4882a593Smuzhiyun unsigned int x86_stepping(unsigned int sig); 43*4882a593Smuzhiyun #ifdef CONFIG_CPU_SUP_INTEL 44*4882a593Smuzhiyun extern void __init cpu_set_core_cap_bits(struct cpuinfo_x86 *c); 45*4882a593Smuzhiyun extern void switch_to_sld(unsigned long tifn); 46*4882a593Smuzhiyun extern bool handle_user_split_lock(struct pt_regs *regs, long error_code); 47*4882a593Smuzhiyun extern bool handle_guest_split_lock(unsigned long ip); 48*4882a593Smuzhiyun #else cpu_set_core_cap_bits(struct cpuinfo_x86 * c)49*4882a593Smuzhiyunstatic inline void __init cpu_set_core_cap_bits(struct cpuinfo_x86 *c) {} switch_to_sld(unsigned long tifn)50*4882a593Smuzhiyunstatic inline void switch_to_sld(unsigned long tifn) {} handle_user_split_lock(struct pt_regs * regs,long error_code)51*4882a593Smuzhiyunstatic inline bool handle_user_split_lock(struct pt_regs *regs, long error_code) 52*4882a593Smuzhiyun { 53*4882a593Smuzhiyun return false; 54*4882a593Smuzhiyun } 55*4882a593Smuzhiyun handle_guest_split_lock(unsigned long ip)56*4882a593Smuzhiyunstatic inline bool handle_guest_split_lock(unsigned long ip) 57*4882a593Smuzhiyun { 58*4882a593Smuzhiyun return false; 59*4882a593Smuzhiyun } 60*4882a593Smuzhiyun #endif 61*4882a593Smuzhiyun #ifdef CONFIG_IA32_FEAT_CTL 62*4882a593Smuzhiyun void init_ia32_feat_ctl(struct cpuinfo_x86 *c); 63*4882a593Smuzhiyun #else init_ia32_feat_ctl(struct cpuinfo_x86 * c)64*4882a593Smuzhiyunstatic inline void init_ia32_feat_ctl(struct cpuinfo_x86 *c) {} 65*4882a593Smuzhiyun #endif 66*4882a593Smuzhiyun #endif /* _ASM_X86_CPU_H */ 67