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 static inline struct cpumask *cpu_llc_shared_mask(int cpu) 25 { 26 return per_cpu(cpu_llc_shared_map, cpu); 27 } 28 29 static inline struct cpumask *cpu_l2c_shared_mask(int cpu) 30 { 31 return per_cpu(cpu_l2c_shared_map, cpu); 32 } 33 34 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid); 35 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid); 36 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid); 37 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32) 38 DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid); 39 #endif 40 41 struct task_struct; 42 43 struct smp_ops { 44 void (*smp_prepare_boot_cpu)(void); 45 void (*smp_prepare_cpus)(unsigned max_cpus); 46 void (*smp_cpus_done)(unsigned max_cpus); 47 48 void (*stop_other_cpus)(int wait); 49 void (*crash_stop_other_cpus)(void); 50 void (*smp_send_reschedule)(int cpu); 51 52 int (*cpu_up)(unsigned cpu, struct task_struct *tidle); 53 int (*cpu_disable)(void); 54 void (*cpu_die)(unsigned int cpu); 55 void (*play_dead)(void); 56 57 void (*send_call_func_ipi)(const struct cpumask *mask); 58 void (*send_call_func_single_ipi)(int cpu); 59 }; 60 61 /* Globals due to paravirt */ 62 extern void set_cpu_sibling_map(int cpu); 63 64 #ifdef CONFIG_SMP 65 extern struct smp_ops smp_ops; 66 67 static inline void smp_send_stop(void) 68 { 69 smp_ops.stop_other_cpus(0); 70 } 71 72 static inline void stop_other_cpus(void) 73 { 74 smp_ops.stop_other_cpus(1); 75 } 76 77 static inline void smp_prepare_boot_cpu(void) 78 { 79 smp_ops.smp_prepare_boot_cpu(); 80 } 81 82 static inline void smp_prepare_cpus(unsigned int max_cpus) 83 { 84 smp_ops.smp_prepare_cpus(max_cpus); 85 } 86 87 static inline void smp_cpus_done(unsigned int max_cpus) 88 { 89 smp_ops.smp_cpus_done(max_cpus); 90 } 91 92 static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle) 93 { 94 return smp_ops.cpu_up(cpu, tidle); 95 } 96 97 static inline int __cpu_disable(void) 98 { 99 return smp_ops.cpu_disable(); 100 } 101 102 static inline void __cpu_die(unsigned int cpu) 103 { 104 smp_ops.cpu_die(cpu); 105 } 106 107 static inline void play_dead(void) 108 { 109 smp_ops.play_dead(); 110 } 111 112 static inline void smp_send_reschedule(int cpu) 113 { 114 smp_ops.smp_send_reschedule(cpu); 115 } 116 117 static inline void arch_send_call_function_single_ipi(int cpu) 118 { 119 smp_ops.send_call_func_single_ipi(cpu); 120 } 121 122 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) 123 { 124 smp_ops.send_call_func_ipi(mask); 125 } 126 127 void cpu_disable_common(void); 128 void native_smp_prepare_boot_cpu(void); 129 void native_smp_prepare_cpus(unsigned int max_cpus); 130 void calculate_max_logical_packages(void); 131 void native_smp_cpus_done(unsigned int max_cpus); 132 int common_cpu_up(unsigned int cpunum, struct task_struct *tidle); 133 int native_cpu_up(unsigned int cpunum, struct task_struct *tidle); 134 int native_cpu_disable(void); 135 int common_cpu_die(unsigned int cpu); 136 void native_cpu_die(unsigned int cpu); 137 void hlt_play_dead(void); 138 void native_play_dead(void); 139 void play_dead_common(void); 140 void wbinvd_on_cpu(int cpu); 141 int wbinvd_on_all_cpus(void); 142 void cond_wakeup_cpu0(void); 143 144 void native_smp_send_reschedule(int cpu); 145 void native_send_call_func_ipi(const struct cpumask *mask); 146 void native_send_call_func_single_ipi(int cpu); 147 void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle); 148 149 void smp_store_boot_cpu_info(void); 150 void smp_store_cpu_info(int id); 151 152 asmlinkage __visible void smp_reboot_interrupt(void); 153 __visible void smp_reschedule_interrupt(struct pt_regs *regs); 154 __visible void smp_call_function_interrupt(struct pt_regs *regs); 155 __visible void smp_call_function_single_interrupt(struct pt_regs *r); 156 157 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu) 158 #define cpu_acpi_id(cpu) per_cpu(x86_cpu_to_acpiid, cpu) 159 160 /* 161 * This function is needed by all SMP systems. It must _always_ be valid 162 * from the initial startup. We map APIC_BASE very early in page_setup(), 163 * so this is correct in the x86 case. 164 */ 165 #define raw_smp_processor_id() this_cpu_read(cpu_number) 166 #define __smp_processor_id() __this_cpu_read(cpu_number) 167 168 #ifdef CONFIG_X86_32 169 extern int safe_smp_processor_id(void); 170 #else 171 # define safe_smp_processor_id() smp_processor_id() 172 #endif 173 174 #else /* !CONFIG_SMP */ 175 #define wbinvd_on_cpu(cpu) wbinvd() 176 static inline int wbinvd_on_all_cpus(void) 177 { 178 wbinvd(); 179 return 0; 180 } 181 #endif /* CONFIG_SMP */ 182 183 extern unsigned disabled_cpus; 184 185 #ifdef CONFIG_X86_LOCAL_APIC 186 extern int hard_smp_processor_id(void); 187 188 #else /* CONFIG_X86_LOCAL_APIC */ 189 #define hard_smp_processor_id() 0 190 #endif /* CONFIG_X86_LOCAL_APIC */ 191 192 #ifdef CONFIG_DEBUG_NMI_SELFTEST 193 extern void nmi_selftest(void); 194 #else 195 #define nmi_selftest() do { } while (0) 196 #endif 197 198 #endif /* __ASSEMBLY__ */ 199 #endif /* _ASM_X86_SMP_H */ 200