1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_SMP_H 3 #define _ASM_X86_SMP_H 4 #ifndef __ASSEMBLY__ 5 #include <linux/cpumask.h> 6 7 #include <asm/cpumask.h> 8 #include <asm/current.h> 9 #include <asm/thread_info.h> 10 11 extern int smp_num_siblings; 12 extern unsigned int num_processors; 13 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 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); 28 #endif 29 30 struct task_struct; 31 32 struct smp_ops { 33 void (*smp_prepare_boot_cpu)(void); 34 void (*smp_prepare_cpus)(unsigned max_cpus); 35 void (*smp_cpus_done)(unsigned max_cpus); 36 37 void (*stop_other_cpus)(int wait); 38 void (*crash_stop_other_cpus)(void); 39 void (*smp_send_reschedule)(int cpu); 40 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); 45 46 void (*send_call_func_ipi)(const struct cpumask *mask); 47 void (*send_call_func_single_ipi)(int cpu); 48 }; 49 50 /* Globals due to paravirt */ 51 extern void set_cpu_sibling_map(int cpu); 52 53 #ifdef CONFIG_SMP 54 extern struct smp_ops smp_ops; 55 56 static inline void smp_send_stop(void) 57 { 58 smp_ops.stop_other_cpus(0); 59 } 60 61 static inline void stop_other_cpus(void) 62 { 63 smp_ops.stop_other_cpus(1); 64 } 65 66 static inline void smp_prepare_boot_cpu(void) 67 { 68 smp_ops.smp_prepare_boot_cpu(); 69 } 70 71 static inline void smp_prepare_cpus(unsigned int max_cpus) 72 { 73 smp_ops.smp_prepare_cpus(max_cpus); 74 } 75 76 static inline void smp_cpus_done(unsigned int max_cpus) 77 { 78 smp_ops.smp_cpus_done(max_cpus); 79 } 80 81 static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle) 82 { 83 return smp_ops.cpu_up(cpu, tidle); 84 } 85 86 static inline int __cpu_disable(void) 87 { 88 return smp_ops.cpu_disable(); 89 } 90 91 static inline void __cpu_die(unsigned int cpu) 92 { 93 smp_ops.cpu_die(cpu); 94 } 95 96 static inline void play_dead(void) 97 { 98 smp_ops.play_dead(); 99 } 100 101 static inline void smp_send_reschedule(int cpu) 102 { 103 smp_ops.smp_send_reschedule(cpu); 104 } 105 106 static inline void arch_send_call_function_single_ipi(int cpu) 107 { 108 smp_ops.send_call_func_single_ipi(cpu); 109 } 110 111 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) 112 { 113 smp_ops.send_call_func_ipi(mask); 114 } 115 116 void cpu_disable_common(void); 117 void native_smp_prepare_boot_cpu(void); 118 void smp_prepare_cpus_common(void); 119 void native_smp_prepare_cpus(unsigned int max_cpus); 120 void calculate_max_logical_packages(void); 121 void native_smp_cpus_done(unsigned int max_cpus); 122 int common_cpu_up(unsigned int cpunum, struct task_struct *tidle); 123 int native_cpu_up(unsigned int cpunum, struct task_struct *tidle); 124 int native_cpu_disable(void); 125 int common_cpu_die(unsigned int cpu); 126 void native_cpu_die(unsigned int cpu); 127 void hlt_play_dead(void); 128 void native_play_dead(void); 129 void play_dead_common(void); 130 void wbinvd_on_cpu(int cpu); 131 int wbinvd_on_all_cpus(void); 132 void cond_wakeup_cpu0(void); 133 134 void native_smp_send_reschedule(int cpu); 135 void native_send_call_func_ipi(const struct cpumask *mask); 136 void native_send_call_func_single_ipi(int cpu); 137 void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle); 138 139 void smp_store_boot_cpu_info(void); 140 void smp_store_cpu_info(int id); 141 142 asmlinkage __visible void smp_reboot_interrupt(void); 143 __visible void smp_reschedule_interrupt(struct pt_regs *regs); 144 __visible void smp_call_function_interrupt(struct pt_regs *regs); 145 __visible void smp_call_function_single_interrupt(struct pt_regs *r); 146 147 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu) 148 #define cpu_acpi_id(cpu) per_cpu(x86_cpu_to_acpiid, cpu) 149 150 /* 151 * This function is needed by all SMP systems. It must _always_ be valid 152 * from the initial startup. 153 */ 154 #define raw_smp_processor_id() this_cpu_read(pcpu_hot.cpu_number) 155 #define __smp_processor_id() __this_cpu_read(pcpu_hot.cpu_number) 156 157 #ifdef CONFIG_X86_32 158 extern int safe_smp_processor_id(void); 159 #else 160 # define safe_smp_processor_id() smp_processor_id() 161 #endif 162 163 static inline struct cpumask *cpu_llc_shared_mask(int cpu) 164 { 165 return per_cpu(cpu_llc_shared_map, cpu); 166 } 167 168 static inline struct cpumask *cpu_l2c_shared_mask(int cpu) 169 { 170 return per_cpu(cpu_l2c_shared_map, cpu); 171 } 172 173 #else /* !CONFIG_SMP */ 174 #define wbinvd_on_cpu(cpu) wbinvd() 175 static inline int wbinvd_on_all_cpus(void) 176 { 177 wbinvd(); 178 return 0; 179 } 180 181 static inline struct cpumask *cpu_llc_shared_mask(int cpu) 182 { 183 return (struct cpumask *)cpumask_of(0); 184 } 185 #endif /* CONFIG_SMP */ 186 187 extern unsigned disabled_cpus; 188 189 #ifdef CONFIG_X86_LOCAL_APIC 190 extern int hard_smp_processor_id(void); 191 192 #else /* CONFIG_X86_LOCAL_APIC */ 193 #define hard_smp_processor_id() 0 194 #endif /* CONFIG_X86_LOCAL_APIC */ 195 196 #ifdef CONFIG_DEBUG_NMI_SELFTEST 197 extern void nmi_selftest(void); 198 #else 199 #define nmi_selftest() do { } while (0) 200 #endif 201 202 #endif /* __ASSEMBLY__ */ 203 #endif /* _ASM_X86_SMP_H */ 204