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);
29 void (*smp_prepare_boot_cpu)(void);
30 void (*smp_prepare_cpus)(unsigned max_cpus);
31 void (*smp_cpus_done)(unsigned max_cpus);
33 void (*stop_other_cpus)(int wait);
34 void (*crash_stop_other_cpus)(void);
35 void (*smp_send_reschedule)(int cpu);
37 void (*cleanup_dead_cpu)(unsigned cpu);
38 void (*poll_sync_state)(void);
39 int (*kick_ap_alive)(unsigned cpu, struct task_struct *tidle);
40 int (*cpu_disable)(void);
41 void (*cpu_die)(unsigned int cpu);
42 void (*play_dead)(void);
44 void (*send_call_func_ipi)(const struct cpumask *mask);
45 void (*send_call_func_single_ipi)(int cpu);
48 /* Globals due to paravirt */
49 extern void set_cpu_sibling_map(int cpu);
52 extern struct smp_ops smp_ops;
54 static inline void smp_send_stop(void)
56 smp_ops.stop_other_cpus(0);
59 static inline void stop_other_cpus(void)
61 smp_ops.stop_other_cpus(1);
64 static inline void smp_prepare_boot_cpu(void)
66 smp_ops.smp_prepare_boot_cpu();
69 static inline void smp_prepare_cpus(unsigned int max_cpus)
71 smp_ops.smp_prepare_cpus(max_cpus);
74 static inline void smp_cpus_done(unsigned int max_cpus)
76 smp_ops.smp_cpus_done(max_cpus);
79 static inline int __cpu_disable(void)
81 return smp_ops.cpu_disable();
84 static inline void __cpu_die(unsigned int cpu)
90 static inline void __noreturn play_dead(void)
96 static inline void arch_smp_send_reschedule(int cpu)
98 smp_ops.smp_send_reschedule(cpu);
101 static inline void arch_send_call_function_single_ipi(int cpu)
103 smp_ops.send_call_func_single_ipi(cpu);
106 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
108 smp_ops.send_call_func_ipi(mask);
111 void cpu_disable_common(void);
112 void native_smp_prepare_boot_cpu(void);
113 void smp_prepare_cpus_common(void);
114 void native_smp_prepare_cpus(unsigned int max_cpus);
115 void calculate_max_logical_packages(void);
116 void native_smp_cpus_done(unsigned int max_cpus);
117 int common_cpu_up(unsigned int cpunum, struct task_struct *tidle);
118 int native_kick_ap(unsigned int cpu, struct task_struct *tidle);
119 int native_cpu_disable(void);
120 void __noreturn hlt_play_dead(void);
121 void native_play_dead(void);
122 void play_dead_common(void);
123 void wbinvd_on_cpu(int cpu);
124 int wbinvd_on_all_cpus(void);
126 void smp_kick_mwait_play_dead(void);
128 void native_smp_send_reschedule(int cpu);
129 void native_send_call_func_ipi(const struct cpumask *mask);
130 void native_send_call_func_single_ipi(int cpu);
132 bool smp_park_other_cpus_in_init(void);
133 void smp_store_cpu_info(int id);
135 asmlinkage __visible void smp_reboot_interrupt(void);
136 __visible void smp_reschedule_interrupt(struct pt_regs *regs);
137 __visible void smp_call_function_interrupt(struct pt_regs *regs);
138 __visible void smp_call_function_single_interrupt(struct pt_regs *r);
140 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
141 #define cpu_acpi_id(cpu) per_cpu(x86_cpu_to_acpiid, cpu)
144 * This function is needed by all SMP systems. It must _always_ be valid
145 * from the initial startup.
147 #define raw_smp_processor_id() this_cpu_read(pcpu_hot.cpu_number)
148 #define __smp_processor_id() __this_cpu_read(pcpu_hot.cpu_number)
151 extern int safe_smp_processor_id(void);
153 # define safe_smp_processor_id() smp_processor_id()
156 static inline struct cpumask *cpu_llc_shared_mask(int cpu)
158 return per_cpu(cpu_llc_shared_map, cpu);
161 static inline struct cpumask *cpu_l2c_shared_mask(int cpu)
163 return per_cpu(cpu_l2c_shared_map, cpu);
166 #else /* !CONFIG_SMP */
167 #define wbinvd_on_cpu(cpu) wbinvd()
168 static inline int wbinvd_on_all_cpus(void)
174 static inline struct cpumask *cpu_llc_shared_mask(int cpu)
176 return (struct cpumask *)cpumask_of(0);
178 #endif /* CONFIG_SMP */
180 extern unsigned disabled_cpus;
182 #ifdef CONFIG_DEBUG_NMI_SELFTEST
183 extern void nmi_selftest(void);
185 #define nmi_selftest() do { } while (0)
188 extern unsigned int smpboot_control;
189 extern unsigned long apic_mmio_base;
191 #endif /* !__ASSEMBLY__ */
193 /* Control bits for startup_64 */
194 #define STARTUP_READ_APICID 0x80000000
196 /* Top 8 bits are reserved for control */
197 #define STARTUP_PARALLEL_MASK 0xFF000000
199 #endif /* _ASM_X86_SMP_H */