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 #include <asm/percpu.h> 7 8 #include <asm/thread_info.h> 9 #include <asm/cpumask.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 DECLARE_PER_CPU_READ_MOSTLY(int, cpu_number); 23 24 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid); 25 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid); 26 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid); 27 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32) 28 DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid); 29 #endif 30 31 struct task_struct; 32 33 struct smp_ops { 34 void (*smp_prepare_boot_cpu)(void); 35 void (*smp_prepare_cpus)(unsigned max_cpus); 36 void (*smp_cpus_done)(unsigned max_cpus); 37 38 void (*stop_other_cpus)(int wait); 39 void (*crash_stop_other_cpus)(void); 40 void (*smp_send_reschedule)(int cpu); 41 42 int (*cpu_up)(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_up(unsigned int cpu, struct task_struct *tidle) 83 { 84 return smp_ops.cpu_up(cpu, tidle); 85 } 86 87 static inline int __cpu_disable(void) 88 { 89 return smp_ops.cpu_disable(); 90 } 91 92 static inline void __cpu_die(unsigned int cpu) 93 { 94 smp_ops.cpu_die(cpu); 95 } 96 97 static inline void play_dead(void) 98 { 99 smp_ops.play_dead(); 100 } 101 102 static inline void 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 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. We map APIC_BASE very early in page_setup(), 154 * so this is correct in the x86 case. 155 */ 156 #define raw_smp_processor_id() this_cpu_read(cpu_number) 157 #define __smp_processor_id() __this_cpu_read(cpu_number) 158 159 #ifdef CONFIG_X86_32 160 extern int safe_smp_processor_id(void); 161 #else 162 # define safe_smp_processor_id() smp_processor_id() 163 #endif 164 165 static inline struct cpumask *cpu_llc_shared_mask(int cpu) 166 { 167 return per_cpu(cpu_llc_shared_map, cpu); 168 } 169 170 static inline struct cpumask *cpu_l2c_shared_mask(int cpu) 171 { 172 return per_cpu(cpu_l2c_shared_map, cpu); 173 } 174 175 #else /* !CONFIG_SMP */ 176 #define wbinvd_on_cpu(cpu) wbinvd() 177 static inline int wbinvd_on_all_cpus(void) 178 { 179 wbinvd(); 180 return 0; 181 } 182 183 static inline struct cpumask *cpu_llc_shared_mask(int cpu) 184 { 185 return (struct cpumask *)cpumask_of(0); 186 } 187 #endif /* CONFIG_SMP */ 188 189 extern unsigned disabled_cpus; 190 191 #ifdef CONFIG_X86_LOCAL_APIC 192 extern int hard_smp_processor_id(void); 193 194 #else /* CONFIG_X86_LOCAL_APIC */ 195 #define hard_smp_processor_id() 0 196 #endif /* CONFIG_X86_LOCAL_APIC */ 197 198 #ifdef CONFIG_DEBUG_NMI_SELFTEST 199 extern void nmi_selftest(void); 200 #else 201 #define nmi_selftest() do { } while (0) 202 #endif 203 204 #endif /* __ASSEMBLY__ */ 205 #endif /* _ASM_X86_SMP_H */ 206