1 /* SPDX-License-Identifier: GPL-2.0 */
5 #include <linux/cpumask.h>
7 #include <asm/cpumask.h>
8 #include <asm/current.h>
9 #include <asm/thread_info.h>
11 extern int smp_num_siblings;
12 extern unsigned int num_processors;
14 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map);
15 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map);
16 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_die_map);
17 /* cpus sharing the last level cache: */
18 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map);
19 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_l2c_shared_map);
20 DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_llc_id);
21 DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_l2c_id);
23 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid);
24 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid);
25 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid);
26 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
27 DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid);
33 void (*smp_prepare_boot_cpu)(void);
34 void (*smp_prepare_cpus)(unsigned max_cpus);
35 void (*smp_cpus_done)(unsigned max_cpus);
37 void (*stop_other_cpus)(int wait);
38 void (*crash_stop_other_cpus)(void);
39 void (*smp_send_reschedule)(int cpu);
41 int (*cpu_up)(unsigned cpu, struct task_struct *tidle);
42 int (*cpu_disable)(void);
43 void (*cpu_die)(unsigned int cpu);
44 void (*play_dead)(void);
46 void (*send_call_func_ipi)(const struct cpumask *mask);
47 void (*send_call_func_single_ipi)(int cpu);
50 /* Globals due to paravirt */
51 extern void set_cpu_sibling_map(int cpu);
54 extern struct smp_ops smp_ops;
56 static inline void smp_send_stop(void)
58 smp_ops.stop_other_cpus(0);
61 static inline void stop_other_cpus(void)
63 smp_ops.stop_other_cpus(1);
66 static inline void smp_prepare_boot_cpu(void)
68 smp_ops.smp_prepare_boot_cpu();
71 static inline void smp_prepare_cpus(unsigned int max_cpus)
73 smp_ops.smp_prepare_cpus(max_cpus);
76 static inline void smp_cpus_done(unsigned int max_cpus)
78 smp_ops.smp_cpus_done(max_cpus);
81 static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle)
83 return smp_ops.cpu_up(cpu, tidle);
86 static inline int __cpu_disable(void)
88 return smp_ops.cpu_disable();
91 static inline void __cpu_die(unsigned int cpu)
96 static inline void __noreturn play_dead(void)
102 static inline void arch_smp_send_reschedule(int cpu)
104 smp_ops.smp_send_reschedule(cpu);
107 static inline void arch_send_call_function_single_ipi(int cpu)
109 smp_ops.send_call_func_single_ipi(cpu);
112 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
114 smp_ops.send_call_func_ipi(mask);
117 void cpu_disable_common(void);
118 void native_smp_prepare_boot_cpu(void);
119 void smp_prepare_cpus_common(void);
120 void native_smp_prepare_cpus(unsigned int max_cpus);
121 void calculate_max_logical_packages(void);
122 void native_smp_cpus_done(unsigned int max_cpus);
123 int common_cpu_up(unsigned int cpunum, struct task_struct *tidle);
124 int native_cpu_up(unsigned int cpunum, struct task_struct *tidle);
125 int native_cpu_disable(void);
126 int common_cpu_die(unsigned int cpu);
127 void native_cpu_die(unsigned int cpu);
128 void __noreturn hlt_play_dead(void);
129 void native_play_dead(void);
130 void play_dead_common(void);
131 void wbinvd_on_cpu(int cpu);
132 int wbinvd_on_all_cpus(void);
133 void cond_wakeup_cpu0(void);
135 void native_smp_send_reschedule(int cpu);
136 void native_send_call_func_ipi(const struct cpumask *mask);
137 void native_send_call_func_single_ipi(int cpu);
138 void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle);
140 void smp_store_boot_cpu_info(void);
141 void smp_store_cpu_info(int id);
143 asmlinkage __visible void smp_reboot_interrupt(void);
144 __visible void smp_reschedule_interrupt(struct pt_regs *regs);
145 __visible void smp_call_function_interrupt(struct pt_regs *regs);
146 __visible void smp_call_function_single_interrupt(struct pt_regs *r);
148 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
149 #define cpu_acpi_id(cpu) per_cpu(x86_cpu_to_acpiid, cpu)
152 * This function is needed by all SMP systems. It must _always_ be valid
153 * from the initial startup.
155 #define raw_smp_processor_id() this_cpu_read(pcpu_hot.cpu_number)
156 #define __smp_processor_id() __this_cpu_read(pcpu_hot.cpu_number)
159 extern int safe_smp_processor_id(void);
161 # define safe_smp_processor_id() smp_processor_id()
164 static inline struct cpumask *cpu_llc_shared_mask(int cpu)
166 return per_cpu(cpu_llc_shared_map, cpu);
169 static inline struct cpumask *cpu_l2c_shared_mask(int cpu)
171 return per_cpu(cpu_l2c_shared_map, cpu);
174 #else /* !CONFIG_SMP */
175 #define wbinvd_on_cpu(cpu) wbinvd()
176 static inline int wbinvd_on_all_cpus(void)
182 static inline struct cpumask *cpu_llc_shared_mask(int cpu)
184 return (struct cpumask *)cpumask_of(0);
186 #endif /* CONFIG_SMP */
188 extern unsigned disabled_cpus;
190 #ifdef CONFIG_X86_LOCAL_APIC
191 extern int hard_smp_processor_id(void);
193 #else /* CONFIG_X86_LOCAL_APIC */
194 #define hard_smp_processor_id() 0
195 #endif /* CONFIG_X86_LOCAL_APIC */
197 #ifdef CONFIG_DEBUG_NMI_SELFTEST
198 extern void nmi_selftest(void);
200 #define nmi_selftest() do { } while (0)
203 extern unsigned int smpboot_control;
205 #endif /* !__ASSEMBLY__ */
207 #endif /* _ASM_X86_SMP_H */