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 21 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_apicid); 22 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid); 23 24 struct task_struct; 25 26 struct smp_ops { 27 void (*smp_prepare_boot_cpu)(void); 28 void (*smp_prepare_cpus)(unsigned max_cpus); 29 void (*smp_cpus_done)(unsigned max_cpus); 30 31 void (*stop_other_cpus)(int wait); 32 void (*crash_stop_other_cpus)(void); 33 void (*smp_send_reschedule)(int cpu); 34 35 void (*cleanup_dead_cpu)(unsigned cpu); 36 void (*poll_sync_state)(void); 37 int (*kick_ap_alive)(unsigned cpu, struct task_struct *tidle); 38 int (*cpu_disable)(void); 39 void (*cpu_die)(unsigned int cpu); 40 void (*play_dead)(void); 41 42 void (*send_call_func_ipi)(const struct cpumask *mask); 43 void (*send_call_func_single_ipi)(int cpu); 44 }; 45 46 /* Globals due to paravirt */ 47 extern void set_cpu_sibling_map(int cpu); 48 49 #ifdef CONFIG_SMP 50 extern struct smp_ops smp_ops; 51 52 static inline void smp_send_stop(void) 53 { 54 smp_ops.stop_other_cpus(0); 55 } 56 57 static inline void stop_other_cpus(void) 58 { 59 smp_ops.stop_other_cpus(1); 60 } 61 62 static inline void smp_prepare_boot_cpu(void) 63 { 64 smp_ops.smp_prepare_boot_cpu(); 65 } 66 67 static inline void smp_prepare_cpus(unsigned int max_cpus) 68 { 69 smp_ops.smp_prepare_cpus(max_cpus); 70 } 71 72 static inline void smp_cpus_done(unsigned int max_cpus) 73 { 74 smp_ops.smp_cpus_done(max_cpus); 75 } 76 77 static inline int __cpu_disable(void) 78 { 79 return smp_ops.cpu_disable(); 80 } 81 82 static inline void __cpu_die(unsigned int cpu) 83 { 84 if (smp_ops.cpu_die) 85 smp_ops.cpu_die(cpu); 86 } 87 88 static inline void __noreturn play_dead(void) 89 { 90 smp_ops.play_dead(); 91 BUG(); 92 } 93 94 static inline void arch_smp_send_reschedule(int cpu) 95 { 96 smp_ops.smp_send_reschedule(cpu); 97 } 98 99 static inline void arch_send_call_function_single_ipi(int cpu) 100 { 101 smp_ops.send_call_func_single_ipi(cpu); 102 } 103 104 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) 105 { 106 smp_ops.send_call_func_ipi(mask); 107 } 108 109 void cpu_disable_common(void); 110 void native_smp_prepare_boot_cpu(void); 111 void smp_prepare_cpus_common(void); 112 void native_smp_prepare_cpus(unsigned int max_cpus); 113 void calculate_max_logical_packages(void); 114 void native_smp_cpus_done(unsigned int max_cpus); 115 int common_cpu_up(unsigned int cpunum, struct task_struct *tidle); 116 int native_kick_ap(unsigned int cpu, struct task_struct *tidle); 117 int native_cpu_disable(void); 118 void __noreturn hlt_play_dead(void); 119 void native_play_dead(void); 120 void play_dead_common(void); 121 void wbinvd_on_cpu(int cpu); 122 int wbinvd_on_all_cpus(void); 123 124 void smp_kick_mwait_play_dead(void); 125 126 void native_smp_send_reschedule(int cpu); 127 void native_send_call_func_ipi(const struct cpumask *mask); 128 void native_send_call_func_single_ipi(int cpu); 129 130 void smp_store_cpu_info(int id); 131 132 asmlinkage __visible void smp_reboot_interrupt(void); 133 __visible void smp_reschedule_interrupt(struct pt_regs *regs); 134 __visible void smp_call_function_interrupt(struct pt_regs *regs); 135 __visible void smp_call_function_single_interrupt(struct pt_regs *r); 136 137 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu) 138 #define cpu_acpi_id(cpu) per_cpu(x86_cpu_to_acpiid, cpu) 139 140 /* 141 * This function is needed by all SMP systems. It must _always_ be valid 142 * from the initial startup. 143 */ 144 #define raw_smp_processor_id() this_cpu_read(pcpu_hot.cpu_number) 145 #define __smp_processor_id() __this_cpu_read(pcpu_hot.cpu_number) 146 147 #ifdef CONFIG_X86_32 148 extern int safe_smp_processor_id(void); 149 #else 150 # define safe_smp_processor_id() smp_processor_id() 151 #endif 152 153 static inline struct cpumask *cpu_llc_shared_mask(int cpu) 154 { 155 return per_cpu(cpu_llc_shared_map, cpu); 156 } 157 158 static inline struct cpumask *cpu_l2c_shared_mask(int cpu) 159 { 160 return per_cpu(cpu_l2c_shared_map, cpu); 161 } 162 163 #else /* !CONFIG_SMP */ 164 #define wbinvd_on_cpu(cpu) wbinvd() 165 static inline int wbinvd_on_all_cpus(void) 166 { 167 wbinvd(); 168 return 0; 169 } 170 171 static inline struct cpumask *cpu_llc_shared_mask(int cpu) 172 { 173 return (struct cpumask *)cpumask_of(0); 174 } 175 #endif /* CONFIG_SMP */ 176 177 extern unsigned disabled_cpus; 178 179 #ifdef CONFIG_DEBUG_NMI_SELFTEST 180 extern void nmi_selftest(void); 181 #else 182 #define nmi_selftest() do { } while (0) 183 #endif 184 185 extern unsigned int smpboot_control; 186 extern unsigned long apic_mmio_base; 187 188 #endif /* !__ASSEMBLY__ */ 189 190 /* Control bits for startup_64 */ 191 #define STARTUP_READ_APICID 0x80000000 192 193 /* Top 8 bits are reserved for control */ 194 #define STARTUP_PARALLEL_MASK 0xFF000000 195 196 #endif /* _ASM_X86_SMP_H */ 197