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 __noreturn play_dead(void) 97 { 98 smp_ops.play_dead(); 99 BUG(); 100 } 101 102 static inline void arch_smp_send_reschedule(int cpu) 103 { 104 smp_ops.smp_send_reschedule(cpu); 105 } 106 107 static inline void arch_send_call_function_single_ipi(int cpu) 108 { 109 smp_ops.send_call_func_single_ipi(cpu); 110 } 111 112 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) 113 { 114 smp_ops.send_call_func_ipi(mask); 115 } 116 117 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); 134 135 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); 139 140 void smp_store_boot_cpu_info(void); 141 void smp_store_cpu_info(int id); 142 143 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); 147 148 #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) 150 151 /* 152 * This function is needed by all SMP systems. It must _always_ be valid 153 * from the initial startup. 154 */ 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) 157 158 #ifdef CONFIG_X86_32 159 extern int safe_smp_processor_id(void); 160 #else 161 # define safe_smp_processor_id() smp_processor_id() 162 #endif 163 164 static inline struct cpumask *cpu_llc_shared_mask(int cpu) 165 { 166 return per_cpu(cpu_llc_shared_map, cpu); 167 } 168 169 static inline struct cpumask *cpu_l2c_shared_mask(int cpu) 170 { 171 return per_cpu(cpu_l2c_shared_map, cpu); 172 } 173 174 #else /* !CONFIG_SMP */ 175 #define wbinvd_on_cpu(cpu) wbinvd() 176 static inline int wbinvd_on_all_cpus(void) 177 { 178 wbinvd(); 179 return 0; 180 } 181 182 static inline struct cpumask *cpu_llc_shared_mask(int cpu) 183 { 184 return (struct cpumask *)cpumask_of(0); 185 } 186 #endif /* CONFIG_SMP */ 187 188 extern unsigned disabled_cpus; 189 190 #ifdef CONFIG_X86_LOCAL_APIC 191 extern int hard_smp_processor_id(void); 192 193 #else /* CONFIG_X86_LOCAL_APIC */ 194 #define hard_smp_processor_id() 0 195 #endif /* CONFIG_X86_LOCAL_APIC */ 196 197 #ifdef CONFIG_DEBUG_NMI_SELFTEST 198 extern void nmi_selftest(void); 199 #else 200 #define nmi_selftest() do { } while (0) 201 #endif 202 203 extern unsigned int smpboot_control; 204 205 #endif /* !__ASSEMBLY__ */ 206 207 #endif /* _ASM_X86_SMP_H */ 208