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 #include <asm/cpufeature.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 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(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 /* Static state in head.S used to set up a CPU */ 43 extern unsigned long stack_start; /* Initial stack pointer address */ 44 45 struct task_struct; 46 47 struct smp_ops { 48 void (*smp_prepare_boot_cpu)(void); 49 void (*smp_prepare_cpus)(unsigned max_cpus); 50 void (*smp_cpus_done)(unsigned max_cpus); 51 52 void (*stop_other_cpus)(int wait); 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 native_smp_cpus_done(unsigned int max_cpus); 134 void common_cpu_up(unsigned int cpunum, struct task_struct *tidle); 135 int native_cpu_up(unsigned int cpunum, struct task_struct *tidle); 136 int native_cpu_disable(void); 137 int common_cpu_die(unsigned int cpu); 138 void native_cpu_die(unsigned int cpu); 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) 151 152 #else /* !CONFIG_SMP */ 153 #define wbinvd_on_cpu(cpu) wbinvd() 154 static inline int wbinvd_on_all_cpus(void) 155 { 156 wbinvd(); 157 return 0; 158 } 159 #endif /* CONFIG_SMP */ 160 161 extern unsigned disabled_cpus; 162 163 #ifdef CONFIG_X86_32_SMP 164 /* 165 * This function is needed by all SMP systems. It must _always_ be valid 166 * from the initial startup. We map APIC_BASE very early in page_setup(), 167 * so this is correct in the x86 case. 168 */ 169 #define raw_smp_processor_id() (this_cpu_read(cpu_number)) 170 extern int safe_smp_processor_id(void); 171 172 #elif defined(CONFIG_X86_64_SMP) 173 #define raw_smp_processor_id() (this_cpu_read(cpu_number)) 174 175 #define stack_smp_processor_id() \ 176 ({ \ 177 struct thread_info *ti; \ 178 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \ 179 ti->cpu; \ 180 }) 181 #define safe_smp_processor_id() smp_processor_id() 182 183 #endif 184 185 #ifdef CONFIG_X86_LOCAL_APIC 186 187 #ifndef CONFIG_X86_64 188 static inline int logical_smp_processor_id(void) 189 { 190 /* we don't want to mark this access volatile - bad code generation */ 191 return GET_APIC_LOGICAL_ID(apic_read(APIC_LDR)); 192 } 193 194 #endif 195 196 extern int hard_smp_processor_id(void); 197 198 #else /* CONFIG_X86_LOCAL_APIC */ 199 200 # ifndef CONFIG_SMP 201 # define hard_smp_processor_id() 0 202 # endif 203 204 #endif /* CONFIG_X86_LOCAL_APIC */ 205 206 #ifdef CONFIG_DEBUG_NMI_SELFTEST 207 extern void nmi_selftest(void); 208 #else 209 #define nmi_selftest() do { } while (0) 210 #endif 211 212 #endif /* __ASSEMBLY__ */ 213 #endif /* _ASM_X86_SMP_H */ 214