1 /* SPDX-License-Identifier: GPL-2.0 */
5 #include <linux/cpumask.h>
6 #include <asm/percpu.h>
8 #include <asm/thread_info.h>
9 #include <asm/cpumask.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);
22 DECLARE_PER_CPU_READ_MOSTLY(int, cpu_number);
24 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid);
25 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid);
26 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid);
27 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
28 DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid);
34 void (*smp_prepare_boot_cpu)(void);
35 void (*smp_prepare_cpus)(unsigned max_cpus);
36 void (*smp_cpus_done)(unsigned max_cpus);
38 void (*stop_other_cpus)(int wait);
39 void (*crash_stop_other_cpus)(void);
40 void (*smp_send_reschedule)(int cpu);
42 int (*cpu_up)(unsigned cpu, struct task_struct *tidle);
43 int (*cpu_disable)(void);
44 void (*cpu_die)(unsigned int cpu);
45 void (*play_dead)(void);
47 void (*send_call_func_ipi)(const struct cpumask *mask);
48 void (*send_call_func_single_ipi)(int cpu);
51 /* Globals due to paravirt */
52 extern void set_cpu_sibling_map(int cpu);
55 extern struct smp_ops smp_ops;
57 static inline void smp_send_stop(void)
59 smp_ops.stop_other_cpus(0);
62 static inline void stop_other_cpus(void)
64 smp_ops.stop_other_cpus(1);
67 static inline void smp_prepare_boot_cpu(void)
69 smp_ops.smp_prepare_boot_cpu();
72 static inline void smp_prepare_cpus(unsigned int max_cpus)
74 smp_ops.smp_prepare_cpus(max_cpus);
77 static inline void smp_cpus_done(unsigned int max_cpus)
79 smp_ops.smp_cpus_done(max_cpus);
82 static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle)
84 return smp_ops.cpu_up(cpu, tidle);
87 static inline int __cpu_disable(void)
89 return smp_ops.cpu_disable();
92 static inline void __cpu_die(unsigned int cpu)
97 static inline void play_dead(void)
102 static inline void 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 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 smp_kick_mwait_play_dead(void);
137 void native_smp_send_reschedule(int cpu);
138 void native_send_call_func_ipi(const struct cpumask *mask);
139 void native_send_call_func_single_ipi(int cpu);
140 void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle);
142 void smp_store_boot_cpu_info(void);
143 void smp_store_cpu_info(int id);
145 asmlinkage __visible void smp_reboot_interrupt(void);
146 __visible void smp_reschedule_interrupt(struct pt_regs *regs);
147 __visible void smp_call_function_interrupt(struct pt_regs *regs);
148 __visible void smp_call_function_single_interrupt(struct pt_regs *r);
150 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
151 #define cpu_acpi_id(cpu) per_cpu(x86_cpu_to_acpiid, cpu)
154 * This function is needed by all SMP systems. It must _always_ be valid
155 * from the initial startup. We map APIC_BASE very early in page_setup(),
156 * so this is correct in the x86 case.
158 #define raw_smp_processor_id() this_cpu_read(cpu_number)
159 #define __smp_processor_id() __this_cpu_read(cpu_number)
162 extern int safe_smp_processor_id(void);
164 # define safe_smp_processor_id() smp_processor_id()
167 static inline struct cpumask *cpu_llc_shared_mask(int cpu)
169 return per_cpu(cpu_llc_shared_map, cpu);
172 static inline struct cpumask *cpu_l2c_shared_mask(int cpu)
174 return per_cpu(cpu_l2c_shared_map, cpu);
177 #else /* !CONFIG_SMP */
178 #define wbinvd_on_cpu(cpu) wbinvd()
179 static inline int wbinvd_on_all_cpus(void)
185 static inline struct cpumask *cpu_llc_shared_mask(int cpu)
187 return (struct cpumask *)cpumask_of(0);
189 #endif /* CONFIG_SMP */
191 extern unsigned disabled_cpus;
193 #ifdef CONFIG_X86_LOCAL_APIC
194 extern int hard_smp_processor_id(void);
196 #else /* CONFIG_X86_LOCAL_APIC */
197 #define hard_smp_processor_id() 0
198 #endif /* CONFIG_X86_LOCAL_APIC */
200 #ifdef CONFIG_DEBUG_NMI_SELFTEST
201 extern void nmi_selftest(void);
203 #define nmi_selftest() do { } while (0)
206 #endif /* __ASSEMBLY__ */
207 #endif /* _ASM_X86_SMP_H */