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(u16, cpu_llc_id); 20 DECLARE_PER_CPU_READ_MOSTLY(int, cpu_number); 21 22 static inline struct cpumask *cpu_llc_shared_mask(int cpu) 23 { 24 return per_cpu(cpu_llc_shared_map, cpu); 25 } 26 27 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid); 28 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid); 29 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid); 30 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32) 31 DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid); 32 #endif 33 34 struct task_struct; 35 36 struct smp_ops { 37 void (*smp_prepare_boot_cpu)(void); 38 void (*smp_prepare_cpus)(unsigned max_cpus); 39 void (*smp_cpus_done)(unsigned max_cpus); 40 41 void (*stop_other_cpus)(int wait); 42 void (*crash_stop_other_cpus)(void); 43 void (*smp_send_reschedule)(int cpu); 44 45 int (*cpu_up)(unsigned cpu, struct task_struct *tidle); 46 int (*cpu_disable)(void); 47 void (*cpu_die)(unsigned int cpu); 48 void (*play_dead)(void); 49 50 void (*send_call_func_ipi)(const struct cpumask *mask); 51 void (*send_call_func_single_ipi)(int cpu); 52 }; 53 54 /* Globals due to paravirt */ 55 extern void set_cpu_sibling_map(int cpu); 56 57 #ifdef CONFIG_SMP 58 extern struct smp_ops smp_ops; 59 60 static inline void smp_send_stop(void) 61 { 62 smp_ops.stop_other_cpus(0); 63 } 64 65 static inline void stop_other_cpus(void) 66 { 67 smp_ops.stop_other_cpus(1); 68 } 69 70 static inline void smp_prepare_boot_cpu(void) 71 { 72 smp_ops.smp_prepare_boot_cpu(); 73 } 74 75 static inline void smp_prepare_cpus(unsigned int max_cpus) 76 { 77 smp_ops.smp_prepare_cpus(max_cpus); 78 } 79 80 static inline void smp_cpus_done(unsigned int max_cpus) 81 { 82 smp_ops.smp_cpus_done(max_cpus); 83 } 84 85 static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle) 86 { 87 return smp_ops.cpu_up(cpu, tidle); 88 } 89 90 static inline int __cpu_disable(void) 91 { 92 return smp_ops.cpu_disable(); 93 } 94 95 static inline void __cpu_die(unsigned int cpu) 96 { 97 smp_ops.cpu_die(cpu); 98 } 99 100 static inline void play_dead(void) 101 { 102 smp_ops.play_dead(); 103 } 104 105 static inline void smp_send_reschedule(int cpu) 106 { 107 smp_ops.smp_send_reschedule(cpu); 108 } 109 110 static inline void arch_send_call_function_single_ipi(int cpu) 111 { 112 smp_ops.send_call_func_single_ipi(cpu); 113 } 114 115 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) 116 { 117 smp_ops.send_call_func_ipi(mask); 118 } 119 120 void cpu_disable_common(void); 121 void native_smp_prepare_boot_cpu(void); 122 void native_smp_prepare_cpus(unsigned int max_cpus); 123 void calculate_max_logical_packages(void); 124 void native_smp_cpus_done(unsigned int max_cpus); 125 int common_cpu_up(unsigned int cpunum, struct task_struct *tidle); 126 int native_cpu_up(unsigned int cpunum, struct task_struct *tidle); 127 int native_cpu_disable(void); 128 int common_cpu_die(unsigned int cpu); 129 void native_cpu_die(unsigned int cpu); 130 void hlt_play_dead(void); 131 void native_play_dead(void); 132 void play_dead_common(void); 133 void wbinvd_on_cpu(int cpu); 134 int wbinvd_on_all_cpus(void); 135 void cond_wakeup_cpu0(void); 136 137 void native_smp_send_reschedule(int cpu); 138 void native_send_call_func_ipi(const struct cpumask *mask); 139 void native_send_call_func_single_ipi(int cpu); 140 void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle); 141 142 void smp_store_boot_cpu_info(void); 143 void smp_store_cpu_info(int id); 144 145 asmlinkage __visible void smp_reboot_interrupt(void); 146 __visible void smp_reschedule_interrupt(struct pt_regs *regs); 147 __visible void smp_call_function_interrupt(struct pt_regs *regs); 148 __visible void smp_call_function_single_interrupt(struct pt_regs *r); 149 150 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu) 151 #define cpu_acpi_id(cpu) per_cpu(x86_cpu_to_acpiid, cpu) 152 153 /* 154 * This function is needed by all SMP systems. It must _always_ be valid 155 * from the initial startup. We map APIC_BASE very early in page_setup(), 156 * so this is correct in the x86 case. 157 */ 158 #define raw_smp_processor_id() this_cpu_read(cpu_number) 159 #define __smp_processor_id() __this_cpu_read(cpu_number) 160 161 #ifdef CONFIG_X86_32 162 extern int safe_smp_processor_id(void); 163 #else 164 # define safe_smp_processor_id() smp_processor_id() 165 #endif 166 167 #else /* !CONFIG_SMP */ 168 #define wbinvd_on_cpu(cpu) wbinvd() 169 static inline int wbinvd_on_all_cpus(void) 170 { 171 wbinvd(); 172 return 0; 173 } 174 #endif /* CONFIG_SMP */ 175 176 extern unsigned disabled_cpus; 177 178 #ifdef CONFIG_X86_LOCAL_APIC 179 extern int hard_smp_processor_id(void); 180 181 #else /* CONFIG_X86_LOCAL_APIC */ 182 #define hard_smp_processor_id() 0 183 #endif /* CONFIG_X86_LOCAL_APIC */ 184 185 #ifdef CONFIG_DEBUG_NMI_SELFTEST 186 extern void nmi_selftest(void); 187 #else 188 #define nmi_selftest() do { } while (0) 189 #endif 190 191 #endif /* __ASSEMBLY__ */ 192 #endif /* _ASM_X86_SMP_H */ 193