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 void (*cleanup_dead_cpu)(unsigned cpu); 42 void (*poll_sync_state)(void); 43 int (*kick_ap_alive)(unsigned cpu, struct task_struct *tidle); 44 int (*cpu_disable)(void); 45 void (*cpu_die)(unsigned int cpu); 46 void (*play_dead)(void); 47 48 void (*send_call_func_ipi)(const struct cpumask *mask); 49 void (*send_call_func_single_ipi)(int cpu); 50 }; 51 52 /* Globals due to paravirt */ 53 extern void set_cpu_sibling_map(int cpu); 54 55 #ifdef CONFIG_SMP 56 extern struct smp_ops smp_ops; 57 58 static inline void smp_send_stop(void) 59 { 60 smp_ops.stop_other_cpus(0); 61 } 62 63 static inline void stop_other_cpus(void) 64 { 65 smp_ops.stop_other_cpus(1); 66 } 67 68 static inline void smp_prepare_boot_cpu(void) 69 { 70 smp_ops.smp_prepare_boot_cpu(); 71 } 72 73 static inline void smp_prepare_cpus(unsigned int max_cpus) 74 { 75 smp_ops.smp_prepare_cpus(max_cpus); 76 } 77 78 static inline void smp_cpus_done(unsigned int max_cpus) 79 { 80 smp_ops.smp_cpus_done(max_cpus); 81 } 82 83 static inline int __cpu_disable(void) 84 { 85 return smp_ops.cpu_disable(); 86 } 87 88 static inline void __cpu_die(unsigned int cpu) 89 { 90 if (smp_ops.cpu_die) 91 smp_ops.cpu_die(cpu); 92 } 93 94 static inline void __noreturn play_dead(void) 95 { 96 smp_ops.play_dead(); 97 BUG(); 98 } 99 100 static inline void arch_smp_send_reschedule(int cpu) 101 { 102 smp_ops.smp_send_reschedule(cpu); 103 } 104 105 static inline void arch_send_call_function_single_ipi(int cpu) 106 { 107 smp_ops.send_call_func_single_ipi(cpu); 108 } 109 110 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) 111 { 112 smp_ops.send_call_func_ipi(mask); 113 } 114 115 void cpu_disable_common(void); 116 void native_smp_prepare_boot_cpu(void); 117 void smp_prepare_cpus_common(void); 118 void native_smp_prepare_cpus(unsigned int max_cpus); 119 void calculate_max_logical_packages(void); 120 void native_smp_cpus_done(unsigned int max_cpus); 121 int common_cpu_up(unsigned int cpunum, struct task_struct *tidle); 122 int native_kick_ap(unsigned int cpu, struct task_struct *tidle); 123 int native_cpu_disable(void); 124 void __noreturn hlt_play_dead(void); 125 void native_play_dead(void); 126 void play_dead_common(void); 127 void wbinvd_on_cpu(int cpu); 128 int wbinvd_on_all_cpus(void); 129 130 void smp_kick_mwait_play_dead(void); 131 132 void native_smp_send_reschedule(int cpu); 133 void native_send_call_func_ipi(const struct cpumask *mask); 134 void native_send_call_func_single_ipi(int cpu); 135 void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle); 136 137 bool smp_park_other_cpus_in_init(void); 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 extern unsigned int smpboot_control; 203 extern unsigned long apic_mmio_base; 204 205 #endif /* !__ASSEMBLY__ */ 206 207 /* Control bits for startup_64 */ 208 #define STARTUP_READ_APICID 0x80000000 209 210 /* Top 8 bits are reserved for control */ 211 #define STARTUP_PARALLEL_MASK 0xFF000000 212 213 #endif /* _ASM_X86_SMP_H */ 214