1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_SMP_H 3 #define _ASM_X86_SMP_H 4 #ifndef __ASSEMBLER__ 5 #include <linux/cpumask.h> 6 #include <linux/thread_info.h> 7 8 #include <asm/cpumask.h> 9 10 DECLARE_PER_CPU_CACHE_HOT(int, cpu_number); 11 12 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map); 13 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map); 14 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_die_map); 15 /* cpus sharing the last level cache: */ 16 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map); 17 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_l2c_shared_map); 18 19 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_apicid); 20 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid); 21 22 struct task_struct; 23 24 struct smp_ops { 25 void (*smp_prepare_boot_cpu)(void); 26 void (*smp_prepare_cpus)(unsigned max_cpus); 27 void (*smp_cpus_done)(unsigned max_cpus); 28 29 void (*stop_other_cpus)(int wait); 30 void (*crash_stop_other_cpus)(void); 31 void (*smp_send_reschedule)(int cpu); 32 33 void (*cleanup_dead_cpu)(unsigned cpu); 34 void (*poll_sync_state)(void); 35 int (*kick_ap_alive)(unsigned cpu, struct task_struct *tidle); 36 int (*cpu_disable)(void); 37 void (*cpu_die)(unsigned int cpu); 38 void (*play_dead)(void); 39 void (*stop_this_cpu)(void); 40 41 void (*send_call_func_ipi)(const struct cpumask *mask); 42 void (*send_call_func_single_ipi)(int cpu); 43 }; 44 45 /* Globals due to paravirt */ 46 extern void set_cpu_sibling_map(int cpu); 47 48 #ifdef CONFIG_SMP 49 extern struct smp_ops smp_ops; 50 51 static inline void smp_send_stop(void) 52 { 53 smp_ops.stop_other_cpus(0); 54 } 55 56 static inline void stop_other_cpus(void) 57 { 58 smp_ops.stop_other_cpus(1); 59 } 60 61 static inline void smp_prepare_cpus(unsigned int max_cpus) 62 { 63 smp_ops.smp_prepare_cpus(max_cpus); 64 } 65 66 static inline void smp_cpus_done(unsigned int max_cpus) 67 { 68 smp_ops.smp_cpus_done(max_cpus); 69 } 70 71 static inline int __cpu_disable(void) 72 { 73 return smp_ops.cpu_disable(); 74 } 75 76 static inline void __cpu_die(unsigned int cpu) 77 { 78 if (smp_ops.cpu_die) 79 smp_ops.cpu_die(cpu); 80 } 81 82 static inline void __noreturn play_dead(void) 83 { 84 smp_ops.play_dead(); 85 BUG(); 86 } 87 88 static inline void arch_smp_send_reschedule(int cpu) 89 { 90 smp_ops.smp_send_reschedule(cpu); 91 } 92 93 static inline void arch_send_call_function_single_ipi(int cpu) 94 { 95 smp_ops.send_call_func_single_ipi(cpu); 96 } 97 98 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) 99 { 100 smp_ops.send_call_func_ipi(mask); 101 } 102 103 void cpu_disable_common(void); 104 void native_smp_prepare_boot_cpu(void); 105 void smp_prepare_cpus_common(void); 106 void native_smp_prepare_cpus(unsigned int max_cpus); 107 void native_smp_cpus_done(unsigned int max_cpus); 108 int common_cpu_up(unsigned int cpunum, struct task_struct *tidle); 109 int native_kick_ap(unsigned int cpu, struct task_struct *tidle); 110 int native_cpu_disable(void); 111 void __noreturn hlt_play_dead(void); 112 void native_play_dead(void); 113 void play_dead_common(void); 114 void wbinvd_on_cpu(int cpu); 115 int wbinvd_on_all_cpus(void); 116 117 void smp_kick_mwait_play_dead(void); 118 void __noreturn mwait_play_dead(unsigned int eax_hint); 119 120 void native_smp_send_reschedule(int cpu); 121 void native_send_call_func_ipi(const struct cpumask *mask); 122 void native_send_call_func_single_ipi(int cpu); 123 124 asmlinkage __visible void smp_reboot_interrupt(void); 125 __visible void smp_reschedule_interrupt(struct pt_regs *regs); 126 __visible void smp_call_function_interrupt(struct pt_regs *regs); 127 __visible void smp_call_function_single_interrupt(struct pt_regs *r); 128 129 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu) 130 #define cpu_acpi_id(cpu) per_cpu(x86_cpu_to_acpiid, cpu) 131 132 /* 133 * This function is needed by all SMP systems. It must _always_ be valid 134 * from the initial startup. 135 */ 136 #define raw_smp_processor_id() this_cpu_read(cpu_number) 137 #define __smp_processor_id() __this_cpu_read(cpu_number) 138 139 static inline struct cpumask *cpu_llc_shared_mask(int cpu) 140 { 141 return per_cpu(cpu_llc_shared_map, cpu); 142 } 143 144 static inline struct cpumask *cpu_l2c_shared_mask(int cpu) 145 { 146 return per_cpu(cpu_l2c_shared_map, cpu); 147 } 148 149 #else /* !CONFIG_SMP */ 150 #define wbinvd_on_cpu(cpu) wbinvd() 151 static inline int wbinvd_on_all_cpus(void) 152 { 153 wbinvd(); 154 return 0; 155 } 156 157 static inline struct cpumask *cpu_llc_shared_mask(int cpu) 158 { 159 return (struct cpumask *)cpumask_of(0); 160 } 161 162 static inline void __noreturn mwait_play_dead(unsigned int eax_hint) { BUG(); } 163 #endif /* CONFIG_SMP */ 164 165 #ifdef CONFIG_DEBUG_NMI_SELFTEST 166 extern void nmi_selftest(void); 167 #else 168 #define nmi_selftest() do { } while (0) 169 #endif 170 171 extern unsigned int smpboot_control; 172 extern unsigned long apic_mmio_base; 173 174 #endif /* !__ASSEMBLER__ */ 175 176 /* Control bits for startup_64 */ 177 #define STARTUP_READ_APICID 0x80000000 178 179 /* Top 8 bits are reserved for control */ 180 #define STARTUP_PARALLEL_MASK 0xFF000000 181 182 #endif /* _ASM_X86_SMP_H */ 183