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