diff options
Diffstat (limited to 'arch/s390/include/asm/smp.h')
| -rw-r--r-- | arch/s390/include/asm/smp.h | 132 |
1 files changed, 47 insertions, 85 deletions
diff --git a/arch/s390/include/asm/smp.h b/arch/s390/include/asm/smp.h index ae89cf2478f..4f1307962a9 100644 --- a/arch/s390/include/asm/smp.h +++ b/arch/s390/include/asm/smp.h @@ -1,116 +1,78 @@ /* - * include/asm-s390/smp.h - * - * S390 version - * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation - * Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com), - * Martin Schwidefsky (schwidefsky@de.ibm.com) - * Heiko Carstens (heiko.carstens@de.ibm.com) + * 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 -#include <linux/threads.h> -#include <linux/cpumask.h> -#include <linux/bitops.h> +#include <asm/sigp.h> -#if defined(__KERNEL__) && defined(CONFIG_SMP) && !defined(__ASSEMBLY__) +#ifdef CONFIG_SMP #include <asm/lowcore.h> -#include <asm/sigp.h> -#include <asm/ptrace.h> -#include <asm/system.h> -/* - s390 specific smp.c headers - */ -typedef struct -{ - int intresting; - sigp_ccode ccode; - __u32 status; - __u16 cpu; -} sigp_info; +#define raw_smp_processor_id() (S390_lowcore.cpu_nr) -extern void machine_restart_smp(char *); -extern void machine_halt_smp(void); -extern void machine_power_off_smp(void); +extern struct mutex smp_cpu_state_mutex; -#define NO_PROC_ID 0xFF /* No processor magic marker */ +extern int __cpu_up(unsigned int cpu, struct task_struct *tidle); -/* - * This magic constant controls our willingness to transfer - * a process across CPUs. Such a transfer incurs misses on the L1 - * cache, and on a P6 or P5 with multiple L2 caches L2 hits. My - * gut feeling is this will vary by board in value. For a board - * with separate L2 cache it probably depends also on the RSS, and - * for a board with shared L2 cache it ought to decay fast as other - * processes are run. - */ - -#define PROC_CHANGE_PENALTY 20 /* Schedule penalty */ +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 *); -#define raw_smp_processor_id() (S390_lowcore.cpu_data.cpu_nr) +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_yield_cpu(int cpu); +extern void smp_yield(void); +extern void smp_cpu_set_polarization(int cpu, int val); +extern int smp_cpu_get_polarization(int cpu); +extern void smp_fill_possible_mask(void); -static inline __u16 hard_smp_processor_id(void) +#else /* CONFIG_SMP */ + +static inline void smp_call_ipl_cpu(void (*func)(void *), void *data) { - return stap(); + func(data); } -/* - * returns 1 if cpu is in stopped/check stopped state or not operational - * returns 0 otherwise - */ -static inline int -smp_cpu_not_running(int cpu) +static inline void smp_call_online_cpu(void (*func)(void *), void *data) { - __u32 status; - - switch (signal_processor_ps(&status, 0, cpu, sigp_sense)) { - case sigp_order_code_accepted: - case sigp_status_stored: - /* Check for stopped and check stop state */ - if (status & 0x50) - return 1; - break; - case sigp_not_operational: - return 1; - default: - break; - } - return 0; + func(data); } -#define cpu_logical_map(cpu) (cpu) - -extern int __cpu_disable (void); -extern void __cpu_die (unsigned int cpu); -extern void cpu_die (void) __attribute__ ((noreturn)); -extern int __cpu_up (unsigned int cpu); +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_fill_possible_mask(void) { } -extern struct mutex smp_cpu_state_mutex; -extern int smp_cpu_polarization[]; - -extern int smp_call_function_mask(cpumask_t mask, void (*func)(void *), - void *info, int wait); -#endif +#endif /* CONFIG_SMP */ -#ifndef CONFIG_SMP -static inline void smp_send_stop(void) +static inline void smp_stop_cpu(void) { - /* Disable all interrupts/machine checks */ - __load_psw_mask(psw_kernel_bits & ~PSW_MASK_MCHECK); -} + u16 pcpu = stap(); -#define hard_smp_processor_id() 0 -#define smp_cpu_not_running(cpu) 1 -#endif + for (;;) { + __pcpu_sigp(pcpu, SIGP_STOP, 0, NULL); + cpu_relax(); + } +} #ifdef CONFIG_HOTPLUG_CPU extern int smp_rescan_cpus(void); +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 union save_area *zfcpdump_save_areas[NR_CPUS + 1]; -#endif +#endif /* __ASM_SMP_H */ |