1 #ifndef _ASM_X86_SMP_H 2 #define _ASM_X86_SMP_H 3 #ifndef __ASSEMBLY__ 4 #include <linux/cpumask.h> 5 #include <asm/percpu.h> 6 7 /* 8 * We need the APIC definitions automatically as part of 'smp.h' 9 */ 10 #ifdef CONFIG_X86_LOCAL_APIC 11 # include <asm/mpspec.h> 12 # include <asm/apic.h> 13 # ifdef CONFIG_X86_IO_APIC 14 # include <asm/io_apic.h> 15 # endif 16 #endif 17 #include <asm/thread_info.h> 18 #include <asm/cpumask.h> 19 20 extern int smp_num_siblings; 21 extern unsigned int num_processors; 22 23 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map); 24 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map); 25 /* cpus sharing the last level cache: */ 26 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map); 27 DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_llc_id); 28 DECLARE_PER_CPU_READ_MOSTLY(int, cpu_number); 29 30 static inline struct cpumask *cpu_llc_shared_mask(int cpu) 31 { 32 return per_cpu(cpu_llc_shared_map, cpu); 33 } 34 35 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid); 36 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid); 37 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid); 38 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32) 39 DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid); 40 #endif 41 42 struct task_struct; 43 44 struct smp_ops { 45 void (*smp_prepare_boot_cpu)(void); 46 void (*smp_prepare_cpus)(unsigned max_cpus); 47 void (*smp_cpus_done)(unsigned max_cpus); 48 49 void (*stop_other_cpus)(int wait); 50 void (*crash_stop_other_cpus)(void); 51 void (*smp_send_reschedule)(int cpu); 52 53 int (*cpu_up)(unsigned cpu, struct task_struct *tidle); 54 int (*cpu_disable)(void); 55 void (*cpu_die)(unsigned int cpu); 56 void (*play_dead)(void); 57 58 void (*send_call_func_ipi)(const struct cpumask *mask); 59 void (*send_call_func_single_ipi)(int cpu); 60 }; 61 62 /* Globals due to paravirt */ 63 extern void set_cpu_sibling_map(int cpu); 64 65 #ifdef CONFIG_SMP 66 extern struct smp_ops smp_ops; 67 68 static inline void smp_send_stop(void) 69 { 70 smp_ops.stop_other_cpus(0); 71 } 72 73 static inline void stop_other_cpus(void) 74 { 75 smp_ops.stop_other_cpus(1); 76 } 77 78 static inline void smp_prepare_boot_cpu(void) 79 { 80 smp_ops.smp_prepare_boot_cpu(); 81 } 82 83 static inline void smp_prepare_cpus(unsigned int max_cpus) 84 { 85 smp_ops.smp_prepare_cpus(max_cpus); 86 } 87 88 static inline void smp_cpus_done(unsigned int max_cpus) 89 { 90 smp_ops.smp_cpus_done(max_cpus); 91 } 92 93 static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle) 94 { 95 return smp_ops.cpu_up(cpu, tidle); 96 } 97 98 static inline int __cpu_disable(void) 99 { 100 return smp_ops.cpu_disable(); 101 } 102 103 static inline void __cpu_die(unsigned int cpu) 104 { 105 smp_ops.cpu_die(cpu); 106 } 107 108 static inline void play_dead(void) 109 { 110 smp_ops.play_dead(); 111 } 112 113 static inline void smp_send_reschedule(int cpu) 114 { 115 smp_ops.smp_send_reschedule(cpu); 116 } 117 118 static inline void arch_send_call_function_single_ipi(int cpu) 119 { 120 smp_ops.send_call_func_single_ipi(cpu); 121 } 122 123 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) 124 { 125 smp_ops.send_call_func_ipi(mask); 126 } 127 128 void cpu_disable_common(void); 129 void native_smp_prepare_boot_cpu(void); 130 void native_smp_prepare_cpus(unsigned int max_cpus); 131 void native_smp_cpus_done(unsigned int max_cpus); 132 void 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); 142 143 void native_send_call_func_ipi(const struct cpumask *mask); 144 void native_send_call_func_single_ipi(int cpu); 145 void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle); 146 147 void smp_store_boot_cpu_info(void); 148 void smp_store_cpu_info(int id); 149 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu) 150 #define cpu_acpi_id(cpu) per_cpu(x86_cpu_to_acpiid, cpu) 151 152 /* 153 * This function is needed by all SMP systems. It must _always_ be valid 154 * from the initial startup. We map APIC_BASE very early in page_setup(), 155 * so this is correct in the x86 case. 156 */ 157 #define raw_smp_processor_id() (this_cpu_read(cpu_number)) 158 159 #ifdef CONFIG_X86_32 160 extern int safe_smp_processor_id(void); 161 #else 162 # define safe_smp_processor_id() smp_processor_id() 163 #endif 164 165 #else /* !CONFIG_SMP */ 166 #define wbinvd_on_cpu(cpu) wbinvd() 167 static inline int wbinvd_on_all_cpus(void) 168 { 169 wbinvd(); 170 return 0; 171 } 172 #define smp_num_siblings 1 173 #endif /* CONFIG_SMP */ 174 175 extern unsigned disabled_cpus; 176 177 #ifdef CONFIG_X86_LOCAL_APIC 178 179 #ifndef CONFIG_X86_64 180 static inline int logical_smp_processor_id(void) 181 { 182 /* we don't want to mark this access volatile - bad code generation */ 183 return GET_APIC_LOGICAL_ID(apic_read(APIC_LDR)); 184 } 185 186 #endif 187 188 extern int hard_smp_processor_id(void); 189 190 #else /* CONFIG_X86_LOCAL_APIC */ 191 #define hard_smp_processor_id() 0 192 #endif /* CONFIG_X86_LOCAL_APIC */ 193 194 #ifdef CONFIG_DEBUG_NMI_SELFTEST 195 extern void nmi_selftest(void); 196 #else 197 #define nmi_selftest() do { } while (0) 198 #endif 199 200 #endif /* __ASSEMBLY__ */ 201 #endif /* _ASM_X86_SMP_H */ 202