1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright IBM Corp. 1999, 2012 4 * Author(s): Denis Joseph Barrow, 5 * Martin Schwidefsky <schwidefsky@de.ibm.com>, 6 * Heiko Carstens <heiko.carstens@de.ibm.com>, 7 */ 8 #ifndef __ASM_SMP_H 9 #define __ASM_SMP_H 10 11 #include <asm/sigp.h> 12 #include <asm/lowcore.h> 13 #include <asm/processor.h> 14 15 #define raw_smp_processor_id() (S390_lowcore.cpu_nr) 16 17 extern struct mutex smp_cpu_state_mutex; 18 extern unsigned int smp_cpu_mt_shift; 19 extern unsigned int smp_cpu_mtid; 20 extern __vector128 __initdata boot_cpu_vector_save_area[__NUM_VXRS]; 21 22 extern int __cpu_up(unsigned int cpu, struct task_struct *tidle); 23 24 extern void arch_send_call_function_single_ipi(int cpu); 25 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); 26 27 extern void smp_call_online_cpu(void (*func)(void *), void *); 28 extern void smp_call_ipl_cpu(void (*func)(void *), void *); 29 extern void smp_emergency_stop(void); 30 31 extern int smp_find_processor_id(u16 address); 32 extern int smp_store_status(int cpu); 33 extern void smp_save_dump_cpus(void); 34 extern int smp_vcpu_scheduled(int cpu); 35 extern void smp_yield_cpu(int cpu); 36 extern void smp_cpu_set_polarization(int cpu, int val); 37 extern int smp_cpu_get_polarization(int cpu); 38 extern int smp_cpu_get_cpu_address(int cpu); 39 extern void smp_fill_possible_mask(void); 40 extern void smp_detect_cpus(void); 41 42 static inline void smp_stop_cpu(void) 43 { 44 u16 pcpu = stap(); 45 46 for (;;) { 47 __pcpu_sigp(pcpu, SIGP_STOP, 0, NULL); 48 cpu_relax(); 49 } 50 } 51 52 /* Return thread 0 CPU number as base CPU */ 53 static inline int smp_get_base_cpu(int cpu) 54 { 55 return cpu - (cpu % (smp_cpu_mtid + 1)); 56 } 57 58 static inline void smp_cpus_done(unsigned int max_cpus) 59 { 60 } 61 62 extern int smp_rescan_cpus(void); 63 extern void __noreturn cpu_die(void); 64 extern void __cpu_die(unsigned int cpu); 65 extern int __cpu_disable(void); 66 extern void schedule_mcck_handler(void); 67 68 #endif /* __ASM_SMP_H */ 69