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 /* cpus sharing the last level cache: */ 27 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map); 28 DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_llc_id); 29 DECLARE_PER_CPU_READ_MOSTLY(int, cpu_number); 30 cpu_llc_shared_mask(int cpu)31 static inline struct cpumask *cpu_llc_shared_mask(int cpu) 32 { 33 return per_cpu(cpu_llc_shared_map, cpu); 34 } 35 36 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid); 37 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid); 38 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid); 39 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32) 40 DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid); 41 #endif 42 43 struct task_struct; 44 45 struct smp_ops { 46 void (*smp_prepare_boot_cpu)(void); 47 void (*smp_prepare_cpus)(unsigned max_cpus); 48 void (*smp_cpus_done)(unsigned max_cpus); 49 50 void (*stop_other_cpus)(int wait); 51 void (*crash_stop_other_cpus)(void); 52 void (*smp_send_reschedule)(int cpu); 53 54 int (*cpu_up)(unsigned cpu, struct task_struct *tidle); 55 int (*cpu_disable)(void); 56 void (*cpu_die)(unsigned int cpu); 57 void (*play_dead)(void); 58 59 void (*send_call_func_ipi)(const struct cpumask *mask); 60 void (*send_call_func_single_ipi)(int cpu); 61 }; 62 63 /* Globals due to paravirt */ 64 extern void set_cpu_sibling_map(int cpu); 65 66 #ifdef CONFIG_SMP 67 extern struct smp_ops smp_ops; 68 smp_send_stop(void)69 static inline void smp_send_stop(void) 70 { 71 smp_ops.stop_other_cpus(0); 72 } 73 stop_other_cpus(void)74 static inline void stop_other_cpus(void) 75 { 76 smp_ops.stop_other_cpus(1); 77 } 78 smp_prepare_boot_cpu(void)79 static inline void smp_prepare_boot_cpu(void) 80 { 81 smp_ops.smp_prepare_boot_cpu(); 82 } 83 smp_prepare_cpus(unsigned int max_cpus)84 static inline void smp_prepare_cpus(unsigned int max_cpus) 85 { 86 smp_ops.smp_prepare_cpus(max_cpus); 87 } 88 smp_cpus_done(unsigned int max_cpus)89 static inline void smp_cpus_done(unsigned int max_cpus) 90 { 91 smp_ops.smp_cpus_done(max_cpus); 92 } 93 __cpu_up(unsigned int cpu,struct task_struct * tidle)94 static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle) 95 { 96 return smp_ops.cpu_up(cpu, tidle); 97 } 98 __cpu_disable(void)99 static inline int __cpu_disable(void) 100 { 101 return smp_ops.cpu_disable(); 102 } 103 __cpu_die(unsigned int cpu)104 static inline void __cpu_die(unsigned int cpu) 105 { 106 smp_ops.cpu_die(cpu); 107 } 108 play_dead(void)109 static inline void play_dead(void) 110 { 111 smp_ops.play_dead(); 112 } 113 smp_send_reschedule(int cpu)114 static inline void smp_send_reschedule(int cpu) 115 { 116 smp_ops.smp_send_reschedule(cpu); 117 } 118 arch_send_call_function_single_ipi(int cpu)119 static inline void arch_send_call_function_single_ipi(int cpu) 120 { 121 smp_ops.send_call_func_single_ipi(cpu); 122 } 123 arch_send_call_function_ipi_mask(const struct cpumask * mask)124 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) 125 { 126 smp_ops.send_call_func_ipi(mask); 127 } 128 129 void cpu_disable_common(void); 130 void native_smp_prepare_boot_cpu(void); 131 void native_smp_prepare_cpus(unsigned int max_cpus); 132 void native_smp_cpus_done(unsigned int max_cpus); 133 void common_cpu_up(unsigned int cpunum, struct task_struct *tidle); 134 int native_cpu_up(unsigned int cpunum, struct task_struct *tidle); 135 int native_cpu_disable(void); 136 int common_cpu_die(unsigned int cpu); 137 void native_cpu_die(unsigned int cpu); 138 void hlt_play_dead(void); 139 void native_play_dead(void); 140 void play_dead_common(void); 141 void wbinvd_on_cpu(int cpu); 142 int wbinvd_on_all_cpus(void); 143 144 void native_send_call_func_ipi(const struct cpumask *mask); 145 void native_send_call_func_single_ipi(int cpu); 146 void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle); 147 148 void smp_store_boot_cpu_info(void); 149 void smp_store_cpu_info(int id); 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)) 159 160 #ifdef CONFIG_X86_32 161 extern int safe_smp_processor_id(void); 162 #else 163 # define safe_smp_processor_id() smp_processor_id() 164 #endif 165 166 #else /* !CONFIG_SMP */ 167 #define wbinvd_on_cpu(cpu) wbinvd() wbinvd_on_all_cpus(void)168 static inline int wbinvd_on_all_cpus(void) 169 { 170 wbinvd(); 171 return 0; 172 } 173 #endif /* CONFIG_SMP */ 174 175 extern unsigned disabled_cpus; 176 177 #ifdef CONFIG_X86_LOCAL_APIC 178 extern int hard_smp_processor_id(void); 179 180 #else /* CONFIG_X86_LOCAL_APIC */ 181 #define hard_smp_processor_id() 0 182 #endif /* CONFIG_X86_LOCAL_APIC */ 183 184 #ifdef CONFIG_DEBUG_NMI_SELFTEST 185 extern void nmi_selftest(void); 186 #else 187 #define nmi_selftest() do { } while (0) 188 #endif 189 190 #endif /* __ASSEMBLY__ */ 191 #endif /* _ASM_X86_SMP_H */ 192