diff options
Diffstat (limited to 'arch/s390/include/asm/smp.h')
| -rw-r--r-- | arch/s390/include/asm/smp.h | 83 |
1 files changed, 53 insertions, 30 deletions
diff --git a/arch/s390/include/asm/smp.h b/arch/s390/include/asm/smp.h index b64f15c3b4cc..fb2bdbf35da5 100644 --- a/arch/s390/include/asm/smp.h +++ b/arch/s390/include/asm/smp.h @@ -1,67 +1,90 @@ +/* SPDX-License-Identifier: GPL-2.0 */ /* * Copyright IBM Corp. 1999, 2012 * Author(s): Denis Joseph Barrow, * Martin Schwidefsky <schwidefsky@de.ibm.com>, - * Heiko Carstens <heiko.carstens@de.ibm.com>, */ #ifndef __ASM_SMP_H #define __ASM_SMP_H -#ifdef CONFIG_SMP - +#include <asm/processor.h> #include <asm/lowcore.h> +#include <asm/machine.h> +#include <asm/sigp.h> + +static __always_inline unsigned int raw_smp_processor_id(void) +{ + unsigned long lc_cpu_nr; + unsigned int cpu; + + BUILD_BUG_ON(sizeof_field(struct lowcore, cpu_nr) != sizeof(cpu)); + lc_cpu_nr = offsetof(struct lowcore, cpu_nr); + asm_inline( + ALTERNATIVE(" ly %[cpu],%[offzero](%%r0)\n", + " ly %[cpu],%[offalt](%%r0)\n", + ALT_FEATURE(MFEATURE_LOWCORE)) + : [cpu] "=d" (cpu) + : [offzero] "i" (lc_cpu_nr), + [offalt] "i" (lc_cpu_nr + LOWCORE_ALT_ADDRESS), + "m" (((struct lowcore *)0)->cpu_nr)); + return cpu; +} -#define raw_smp_processor_id() (S390_lowcore.cpu_nr) +#define arch_scale_cpu_capacity smp_cpu_get_capacity extern struct mutex smp_cpu_state_mutex; -extern struct save_area *zfcpdump_save_areas[NR_CPUS + 1]; +extern unsigned int smp_cpu_mt_shift; +extern unsigned int smp_cpu_mtid; +extern __vector128 __initdata boot_cpu_vector_save_area[__NUM_VXRS]; +extern cpumask_t cpu_setup_mask; extern int __cpu_up(unsigned int cpu, struct task_struct *tidle); extern void arch_send_call_function_single_ipi(int cpu); extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); -extern void smp_call_online_cpu(void (*func)(void *), void *); -extern void smp_call_ipl_cpu(void (*func)(void *), void *); +extern void __noreturn smp_call_ipl_cpu(void (*func)(void *), void *data); +extern void smp_emergency_stop(void); extern int smp_find_processor_id(u16 address); extern int smp_store_status(int cpu); -extern int smp_vcpu_scheduled(int cpu); +extern void smp_save_dump_ipl_cpu(void); +extern void smp_save_dump_secondary_cpus(void); extern void smp_yield_cpu(int cpu); -extern void smp_yield(void); -extern void smp_stop_cpu(void); extern void smp_cpu_set_polarization(int cpu, int val); extern int smp_cpu_get_polarization(int cpu); +extern void smp_cpu_set_capacity(int cpu, unsigned long val); +extern void smp_set_core_capacity(int cpu, unsigned long val); +extern unsigned long smp_cpu_get_capacity(int cpu); +extern int smp_cpu_get_cpu_address(int cpu); +extern void smp_fill_possible_mask(void); +extern void smp_detect_cpus(void); -#else /* CONFIG_SMP */ - -static inline void smp_call_ipl_cpu(void (*func)(void *), void *data) +static inline void smp_stop_cpu(void) { - func(data); + u16 pcpu = stap(); + + for (;;) { + __pcpu_sigp(pcpu, SIGP_STOP, 0, NULL); + cpu_relax(); + } } -static inline void smp_call_online_cpu(void (*func)(void *), void *data) +/* Return thread 0 CPU number as base CPU */ +static inline int smp_get_base_cpu(int cpu) { - func(data); + return cpu - (cpu % (smp_cpu_mtid + 1)); } -static inline int smp_find_processor_id(u16 address) { return 0; } -static inline int smp_store_status(int cpu) { return 0; } -static inline int smp_vcpu_scheduled(int cpu) { return 1; } -static inline void smp_yield_cpu(int cpu) { } -static inline void smp_yield(void) { } -static inline void smp_stop_cpu(void) { } - -#endif /* CONFIG_SMP */ +static inline void smp_cpus_done(unsigned int max_cpus) +{ +} -#ifdef CONFIG_HOTPLUG_CPU -extern int smp_rescan_cpus(void); +extern int smp_rescan_cpus(bool early); extern void __noreturn cpu_die(void); extern void __cpu_die(unsigned int cpu); extern int __cpu_disable(void); -#else -static inline int smp_rescan_cpus(void) { return 0; } -static inline void cpu_die(void) { } -#endif +extern void schedule_mcck_handler(void); +void notrace smp_yield_cpu(int cpu); #endif /* __ASM_SMP_H */ |