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 /* 9 * We need the APIC definitions automatically as part of 'smp.h' 10 */ 11 #ifdef CONFIG_X86_LOCAL_APIC 12 # include <asm/mpspec.h> 13 # include <asm/apic.h> 14 # ifdef CONFIG_X86_IO_APIC 15 # include <asm/io_apic.h> 16 # endif 17 #endif 18 #include <asm/thread_info.h> 19 #include <asm/cpumask.h> 20 21 extern int smp_num_siblings; 22 extern unsigned int num_processors; 23 24 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map); 25 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map); 26 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_die_map); 27 /* cpus sharing the last level cache: */ 28 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map); 29 DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_llc_id); 30 DECLARE_PER_CPU_READ_MOSTLY(int, cpu_number); 31 32 static inline struct cpumask *cpu_llc_shared_mask(int cpu) 33 { 34 return per_cpu(cpu_llc_shared_map, cpu); 35 } 36 37 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid); 38 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid); 39 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid); 40 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32) 41 DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid); 42 #endif 43 44 struct task_struct; 45 46 struct smp_ops { 47 void (*smp_prepare_boot_cpu)(void); 48 void (*smp_prepare_cpus)(unsigned max_cpus); 49 void (*smp_cpus_done)(unsigned max_cpus); 50 51 void (*stop_other_cpus)(int wait); 52 void (*crash_stop_other_cpus)(void); 53 void (*smp_send_reschedule)(int cpu); 54 55 int (*cpu_up)(unsigned cpu, struct task_struct *tidle); 56 int (*cpu_disable)(void); 57 void (*cpu_die)(unsigned int cpu); 58 void (*play_dead)(void); 59 60 void (*send_call_func_ipi)(const struct cpumask *mask); 61 void (*send_call_func_single_ipi)(int cpu); 62 }; 63 64 /* Globals due to paravirt */ 65 extern void set_cpu_sibling_map(int cpu); 66 67 #ifdef CONFIG_SMP 68 extern struct smp_ops smp_ops; 69 70 static inline void smp_send_stop(void) 71 { 72 smp_ops.stop_other_cpus(0); 73 } 74 75 static inline void stop_other_cpus(void) 76 { 77 smp_ops.stop_other_cpus(1); 78 } 79 80 static inline void smp_prepare_boot_cpu(void) 81 { 82 smp_ops.smp_prepare_boot_cpu(); 83 } 84 85 static inline void smp_prepare_cpus(unsigned int max_cpus) 86 { 87 smp_ops.smp_prepare_cpus(max_cpus); 88 } 89 90 static inline void smp_cpus_done(unsigned int max_cpus) 91 { 92 smp_ops.smp_cpus_done(max_cpus); 93 } 94 95 static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle) 96 { 97 return smp_ops.cpu_up(cpu, tidle); 98 } 99 100 static inline int __cpu_disable(void) 101 { 102 return smp_ops.cpu_disable(); 103 } 104 105 static inline void __cpu_die(unsigned int cpu) 106 { 107 smp_ops.cpu_die(cpu); 108 } 109 110 static inline void play_dead(void) 111 { 112 smp_ops.play_dead(); 113 } 114 115 static inline void smp_send_reschedule(int cpu) 116 { 117 smp_ops.smp_send_reschedule(cpu); 118 } 119 120 static inline void arch_send_call_function_single_ipi(int cpu) 121 { 122 smp_ops.send_call_func_single_ipi(cpu); 123 } 124 125 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) 126 { 127 smp_ops.send_call_func_ipi(mask); 128 } 129 130 void cpu_disable_common(void); 131 void native_smp_prepare_boot_cpu(void); 132 void native_smp_prepare_cpus(unsigned int max_cpus); 133 void calculate_max_logical_packages(void); 134 void native_smp_cpus_done(unsigned int max_cpus); 135 int common_cpu_up(unsigned int cpunum, struct task_struct *tidle); 136 int native_cpu_up(unsigned int cpunum, struct task_struct *tidle); 137 int native_cpu_disable(void); 138 int common_cpu_die(unsigned int cpu); 139 void native_cpu_die(unsigned int cpu); 140 void hlt_play_dead(void); 141 void native_play_dead(void); 142 void play_dead_common(void); 143 void wbinvd_on_cpu(int cpu); 144 int wbinvd_on_all_cpus(void); 145 146 void native_send_call_func_ipi(const struct cpumask *mask); 147 void native_send_call_func_single_ipi(int cpu); 148 void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle); 149 150 void smp_store_boot_cpu_info(void); 151 void smp_store_cpu_info(int id); 152 153 asmlinkage __visible void smp_reboot_interrupt(void); 154 __visible void smp_reschedule_interrupt(struct pt_regs *regs); 155 __visible void smp_call_function_interrupt(struct pt_regs *regs); 156 __visible void smp_call_function_single_interrupt(struct pt_regs *r); 157 158 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu) 159 #define cpu_acpi_id(cpu) per_cpu(x86_cpu_to_acpiid, cpu) 160 161 /* 162 * This function is needed by all SMP systems. It must _always_ be valid 163 * from the initial startup. We map APIC_BASE very early in page_setup(), 164 * so this is correct in the x86 case. 165 */ 166 #define raw_smp_processor_id() this_cpu_read(cpu_number) 167 #define __smp_processor_id() __this_cpu_read(cpu_number) 168 169 #ifdef CONFIG_X86_32 170 extern int safe_smp_processor_id(void); 171 #else 172 # define safe_smp_processor_id() smp_processor_id() 173 #endif 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 #endif /* CONFIG_SMP */ 183 184 extern unsigned disabled_cpus; 185 186 #ifdef CONFIG_X86_LOCAL_APIC 187 extern int hard_smp_processor_id(void); 188 189 #else /* CONFIG_X86_LOCAL_APIC */ 190 #define hard_smp_processor_id() 0 191 #endif /* CONFIG_X86_LOCAL_APIC */ 192 193 #ifdef CONFIG_DEBUG_NMI_SELFTEST 194 extern void nmi_selftest(void); 195 #else 196 #define nmi_selftest() do { } while (0) 197 #endif 198 199 #endif /* __ASSEMBLY__ */ 200 #endif /* _ASM_X86_SMP_H */ 201