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 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map);
12 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map);
13 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_die_map);
14 /* cpus sharing the last level cache: */
15 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map);
16 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_l2c_shared_map);
18 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_apicid);
19 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid);
24 void (*smp_prepare_boot_cpu)(void);
25 void (*smp_prepare_cpus)(unsigned max_cpus);
26 void (*smp_cpus_done)(unsigned max_cpus);
28 void (*stop_other_cpus)(int wait);
29 void (*crash_stop_other_cpus)(void);
30 void (*smp_send_reschedule)(int cpu);
32 void (*cleanup_dead_cpu)(unsigned cpu);
33 void (*poll_sync_state)(void);
34 int (*kick_ap_alive)(unsigned cpu, struct task_struct *tidle);
35 int (*cpu_disable)(void);
36 void (*cpu_die)(unsigned int cpu);
37 void (*play_dead)(void);
39 void (*send_call_func_ipi)(const struct cpumask *mask);
40 void (*send_call_func_single_ipi)(int cpu);
43 /* Globals due to paravirt */
44 extern void set_cpu_sibling_map(int cpu);
47 extern struct smp_ops smp_ops;
49 static inline void smp_send_stop(void)
51 smp_ops.stop_other_cpus(0);
54 static inline void stop_other_cpus(void)
56 smp_ops.stop_other_cpus(1);
59 static inline void smp_prepare_cpus(unsigned int max_cpus)
61 smp_ops.smp_prepare_cpus(max_cpus);
64 static inline void smp_cpus_done(unsigned int max_cpus)
66 smp_ops.smp_cpus_done(max_cpus);
69 static inline int __cpu_disable(void)
71 return smp_ops.cpu_disable();
74 static inline void __cpu_die(unsigned int cpu)
80 static inline void __noreturn play_dead(void)
86 static inline void arch_smp_send_reschedule(int cpu)
88 smp_ops.smp_send_reschedule(cpu);
91 static inline void arch_send_call_function_single_ipi(int cpu)
93 smp_ops.send_call_func_single_ipi(cpu);
96 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
98 smp_ops.send_call_func_ipi(mask);
101 void cpu_disable_common(void);
102 void native_smp_prepare_boot_cpu(void);
103 void smp_prepare_cpus_common(void);
104 void native_smp_prepare_cpus(unsigned int max_cpus);
105 void native_smp_cpus_done(unsigned int max_cpus);
106 int common_cpu_up(unsigned int cpunum, struct task_struct *tidle);
107 int native_kick_ap(unsigned int cpu, struct task_struct *tidle);
108 int native_cpu_disable(void);
109 void __noreturn hlt_play_dead(void);
110 void native_play_dead(void);
111 void play_dead_common(void);
112 void wbinvd_on_cpu(int cpu);
113 int wbinvd_on_all_cpus(void);
115 void smp_kick_mwait_play_dead(void);
117 void native_smp_send_reschedule(int cpu);
118 void native_send_call_func_ipi(const struct cpumask *mask);
119 void native_send_call_func_single_ipi(int cpu);
121 void smp_store_cpu_info(int id);
123 asmlinkage __visible void smp_reboot_interrupt(void);
124 __visible void smp_reschedule_interrupt(struct pt_regs *regs);
125 __visible void smp_call_function_interrupt(struct pt_regs *regs);
126 __visible void smp_call_function_single_interrupt(struct pt_regs *r);
128 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
129 #define cpu_acpi_id(cpu) per_cpu(x86_cpu_to_acpiid, cpu)
132 * This function is needed by all SMP systems. It must _always_ be valid
133 * from the initial startup.
135 #define raw_smp_processor_id() this_cpu_read(pcpu_hot.cpu_number)
136 #define __smp_processor_id() __this_cpu_read(pcpu_hot.cpu_number)
139 extern int safe_smp_processor_id(void);
141 # define safe_smp_processor_id() smp_processor_id()
144 static inline struct cpumask *cpu_llc_shared_mask(int cpu)
146 return per_cpu(cpu_llc_shared_map, cpu);
149 static inline struct cpumask *cpu_l2c_shared_mask(int cpu)
151 return per_cpu(cpu_l2c_shared_map, cpu);
154 #else /* !CONFIG_SMP */
155 #define wbinvd_on_cpu(cpu) wbinvd()
156 static inline int wbinvd_on_all_cpus(void)
162 static inline struct cpumask *cpu_llc_shared_mask(int cpu)
164 return (struct cpumask *)cpumask_of(0);
166 #endif /* CONFIG_SMP */
168 #ifdef CONFIG_DEBUG_NMI_SELFTEST
169 extern void nmi_selftest(void);
171 #define nmi_selftest() do { } while (0)
174 extern unsigned int smpboot_control;
175 extern unsigned long apic_mmio_base;
177 #endif /* !__ASSEMBLY__ */
179 /* Control bits for startup_64 */
180 #define STARTUP_READ_APICID 0x80000000
182 /* Top 8 bits are reserved for control */
183 #define STARTUP_PARALLEL_MASK 0xFF000000
185 #endif /* _ASM_X86_SMP_H */