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 static inline bool cpu_has_ht_siblings(void) 25 { 26 bool has_siblings = false; 27 #ifdef CONFIG_SMP 28 has_siblings = cpu_has_ht && smp_num_siblings > 1; 29 #endif 30 return has_siblings; 31 } 32 33 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map); 34 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map); 35 /* cpus sharing the last level cache: */ 36 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map); 37 DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_llc_id); 38 DECLARE_PER_CPU_READ_MOSTLY(int, cpu_number); 39 40 static inline struct cpumask *cpu_llc_shared_mask(int cpu) 41 { 42 return per_cpu(cpu_llc_shared_map, cpu); 43 } 44 45 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid); 46 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid); 47 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32) 48 DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid); 49 #endif 50 51 /* Static state in head.S used to set up a CPU */ 52 extern unsigned long stack_start; /* Initial stack pointer address */ 53 54 struct task_struct; 55 56 struct smp_ops { 57 void (*smp_prepare_boot_cpu)(void); 58 void (*smp_prepare_cpus)(unsigned max_cpus); 59 void (*smp_cpus_done)(unsigned max_cpus); 60 61 void (*stop_other_cpus)(int wait); 62 void (*smp_send_reschedule)(int cpu); 63 64 int (*cpu_up)(unsigned cpu, struct task_struct *tidle); 65 int (*cpu_disable)(void); 66 void (*cpu_die)(unsigned int cpu); 67 void (*play_dead)(void); 68 69 void (*send_call_func_ipi)(const struct cpumask *mask); 70 void (*send_call_func_single_ipi)(int cpu); 71 }; 72 73 /* Globals due to paravirt */ 74 extern void set_cpu_sibling_map(int cpu); 75 76 #ifdef CONFIG_SMP 77 #ifndef CONFIG_PARAVIRT 78 #define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0) 79 #endif 80 extern struct smp_ops smp_ops; 81 82 static inline void smp_send_stop(void) 83 { 84 smp_ops.stop_other_cpus(0); 85 } 86 87 static inline void stop_other_cpus(void) 88 { 89 smp_ops.stop_other_cpus(1); 90 } 91 92 static inline void smp_prepare_boot_cpu(void) 93 { 94 smp_ops.smp_prepare_boot_cpu(); 95 } 96 97 static inline void smp_prepare_cpus(unsigned int max_cpus) 98 { 99 smp_ops.smp_prepare_cpus(max_cpus); 100 } 101 102 static inline void smp_cpus_done(unsigned int max_cpus) 103 { 104 smp_ops.smp_cpus_done(max_cpus); 105 } 106 107 static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle) 108 { 109 return smp_ops.cpu_up(cpu, tidle); 110 } 111 112 static inline int __cpu_disable(void) 113 { 114 return smp_ops.cpu_disable(); 115 } 116 117 static inline void __cpu_die(unsigned int cpu) 118 { 119 smp_ops.cpu_die(cpu); 120 } 121 122 static inline void play_dead(void) 123 { 124 smp_ops.play_dead(); 125 } 126 127 static inline void smp_send_reschedule(int cpu) 128 { 129 smp_ops.smp_send_reschedule(cpu); 130 } 131 132 static inline void arch_send_call_function_single_ipi(int cpu) 133 { 134 smp_ops.send_call_func_single_ipi(cpu); 135 } 136 137 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) 138 { 139 smp_ops.send_call_func_ipi(mask); 140 } 141 142 void cpu_disable_common(void); 143 void native_smp_prepare_boot_cpu(void); 144 void native_smp_prepare_cpus(unsigned int max_cpus); 145 void native_smp_cpus_done(unsigned int max_cpus); 146 void common_cpu_up(unsigned int cpunum, struct task_struct *tidle); 147 int native_cpu_up(unsigned int cpunum, struct task_struct *tidle); 148 int native_cpu_disable(void); 149 int common_cpu_die(unsigned int cpu); 150 void native_cpu_die(unsigned int cpu); 151 void native_play_dead(void); 152 void play_dead_common(void); 153 void wbinvd_on_cpu(int cpu); 154 int wbinvd_on_all_cpus(void); 155 156 void native_send_call_func_ipi(const struct cpumask *mask); 157 void native_send_call_func_single_ipi(int cpu); 158 void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle); 159 160 void smp_store_boot_cpu_info(void); 161 void smp_store_cpu_info(int id); 162 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu) 163 164 #else /* !CONFIG_SMP */ 165 #define wbinvd_on_cpu(cpu) wbinvd() 166 static inline int wbinvd_on_all_cpus(void) 167 { 168 wbinvd(); 169 return 0; 170 } 171 #endif /* CONFIG_SMP */ 172 173 extern unsigned disabled_cpus; 174 175 #ifdef CONFIG_X86_32_SMP 176 /* 177 * This function is needed by all SMP systems. It must _always_ be valid 178 * from the initial startup. We map APIC_BASE very early in page_setup(), 179 * so this is correct in the x86 case. 180 */ 181 #define raw_smp_processor_id() (this_cpu_read(cpu_number)) 182 extern int safe_smp_processor_id(void); 183 184 #elif defined(CONFIG_X86_64_SMP) 185 #define raw_smp_processor_id() (this_cpu_read(cpu_number)) 186 187 #define stack_smp_processor_id() \ 188 ({ \ 189 struct thread_info *ti; \ 190 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \ 191 ti->cpu; \ 192 }) 193 #define safe_smp_processor_id() smp_processor_id() 194 195 #endif 196 197 #ifdef CONFIG_X86_LOCAL_APIC 198 199 #ifndef CONFIG_X86_64 200 static inline int logical_smp_processor_id(void) 201 { 202 /* we don't want to mark this access volatile - bad code generation */ 203 return GET_APIC_LOGICAL_ID(apic_read(APIC_LDR)); 204 } 205 206 #endif 207 208 extern int hard_smp_processor_id(void); 209 210 #else /* CONFIG_X86_LOCAL_APIC */ 211 212 # ifndef CONFIG_SMP 213 # define hard_smp_processor_id() 0 214 # endif 215 216 #endif /* CONFIG_X86_LOCAL_APIC */ 217 218 #ifdef CONFIG_DEBUG_NMI_SELFTEST 219 extern void nmi_selftest(void); 220 #else 221 #define nmi_selftest() do { } while (0) 222 #endif 223 224 #endif /* __ASSEMBLY__ */ 225 #endif /* _ASM_X86_SMP_H */ 226