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 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32) 26 DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid); 27 #endif 28 29 struct task_struct; 30 31 struct smp_ops { 32 void (*smp_prepare_boot_cpu)(void); 33 void (*smp_prepare_cpus)(unsigned max_cpus); 34 void (*smp_cpus_done)(unsigned max_cpus); 35 36 void (*stop_other_cpus)(int wait); 37 void (*crash_stop_other_cpus)(void); 38 void (*smp_send_reschedule)(int cpu); 39 40 void (*cleanup_dead_cpu)(unsigned cpu); 41 void (*poll_sync_state)(void); 42 int (*kick_ap_alive)(unsigned cpu, struct task_struct *tidle); 43 int (*cpu_disable)(void); 44 void (*cpu_die)(unsigned int cpu); 45 void (*play_dead)(void); 46 47 void (*send_call_func_ipi)(const struct cpumask *mask); 48 void (*send_call_func_single_ipi)(int cpu); 49 }; 50 51 /* Globals due to paravirt */ 52 extern void set_cpu_sibling_map(int cpu); 53 54 #ifdef CONFIG_SMP 55 extern struct smp_ops smp_ops; 56 57 static inline void smp_send_stop(void) 58 { 59 smp_ops.stop_other_cpus(0); 60 } 61 62 static inline void stop_other_cpus(void) 63 { 64 smp_ops.stop_other_cpus(1); 65 } 66 67 static inline void smp_prepare_boot_cpu(void) 68 { 69 smp_ops.smp_prepare_boot_cpu(); 70 } 71 72 static inline void smp_prepare_cpus(unsigned int max_cpus) 73 { 74 smp_ops.smp_prepare_cpus(max_cpus); 75 } 76 77 static inline void smp_cpus_done(unsigned int max_cpus) 78 { 79 smp_ops.smp_cpus_done(max_cpus); 80 } 81 82 static inline int __cpu_disable(void) 83 { 84 return smp_ops.cpu_disable(); 85 } 86 87 static inline void __cpu_die(unsigned int cpu) 88 { 89 if (smp_ops.cpu_die) 90 smp_ops.cpu_die(cpu); 91 } 92 93 static inline void __noreturn play_dead(void) 94 { 95 smp_ops.play_dead(); 96 BUG(); 97 } 98 99 static inline void arch_smp_send_reschedule(int cpu) 100 { 101 smp_ops.smp_send_reschedule(cpu); 102 } 103 104 static inline void arch_send_call_function_single_ipi(int cpu) 105 { 106 smp_ops.send_call_func_single_ipi(cpu); 107 } 108 109 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) 110 { 111 smp_ops.send_call_func_ipi(mask); 112 } 113 114 void cpu_disable_common(void); 115 void native_smp_prepare_boot_cpu(void); 116 void smp_prepare_cpus_common(void); 117 void native_smp_prepare_cpus(unsigned int max_cpus); 118 void calculate_max_logical_packages(void); 119 void native_smp_cpus_done(unsigned int max_cpus); 120 int common_cpu_up(unsigned int cpunum, struct task_struct *tidle); 121 int native_kick_ap(unsigned int cpu, struct task_struct *tidle); 122 int native_cpu_disable(void); 123 void __noreturn hlt_play_dead(void); 124 void native_play_dead(void); 125 void play_dead_common(void); 126 void wbinvd_on_cpu(int cpu); 127 int wbinvd_on_all_cpus(void); 128 129 void smp_kick_mwait_play_dead(void); 130 131 void native_smp_send_reschedule(int cpu); 132 void native_send_call_func_ipi(const struct cpumask *mask); 133 void native_send_call_func_single_ipi(int cpu); 134 void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle); 135 136 bool smp_park_other_cpus_in_init(void); 137 138 void smp_store_boot_cpu_info(void); 139 void smp_store_cpu_info(int id); 140 141 asmlinkage __visible void smp_reboot_interrupt(void); 142 __visible void smp_reschedule_interrupt(struct pt_regs *regs); 143 __visible void smp_call_function_interrupt(struct pt_regs *regs); 144 __visible void smp_call_function_single_interrupt(struct pt_regs *r); 145 146 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu) 147 #define cpu_acpi_id(cpu) per_cpu(x86_cpu_to_acpiid, cpu) 148 149 /* 150 * This function is needed by all SMP systems. It must _always_ be valid 151 * from the initial startup. 152 */ 153 #define raw_smp_processor_id() this_cpu_read(pcpu_hot.cpu_number) 154 #define __smp_processor_id() __this_cpu_read(pcpu_hot.cpu_number) 155 156 #ifdef CONFIG_X86_32 157 extern int safe_smp_processor_id(void); 158 #else 159 # define safe_smp_processor_id() smp_processor_id() 160 #endif 161 162 static inline struct cpumask *cpu_llc_shared_mask(int cpu) 163 { 164 return per_cpu(cpu_llc_shared_map, cpu); 165 } 166 167 static inline struct cpumask *cpu_l2c_shared_mask(int cpu) 168 { 169 return per_cpu(cpu_l2c_shared_map, cpu); 170 } 171 172 #else /* !CONFIG_SMP */ 173 #define wbinvd_on_cpu(cpu) wbinvd() 174 static inline int wbinvd_on_all_cpus(void) 175 { 176 wbinvd(); 177 return 0; 178 } 179 180 static inline struct cpumask *cpu_llc_shared_mask(int cpu) 181 { 182 return (struct cpumask *)cpumask_of(0); 183 } 184 #endif /* CONFIG_SMP */ 185 186 extern unsigned disabled_cpus; 187 188 #ifdef CONFIG_DEBUG_NMI_SELFTEST 189 extern void nmi_selftest(void); 190 #else 191 #define nmi_selftest() do { } while (0) 192 #endif 193 194 extern unsigned int smpboot_control; 195 extern unsigned long apic_mmio_base; 196 197 #endif /* !__ASSEMBLY__ */ 198 199 /* Control bits for startup_64 */ 200 #define STARTUP_READ_APICID 0x80000000 201 202 /* Top 8 bits are reserved for control */ 203 #define STARTUP_PARALLEL_MASK 0xFF000000 204 205 #endif /* _ASM_X86_SMP_H */ 206