diff options
Diffstat (limited to 'arch/s390/kernel/smp.c')
| -rw-r--r-- | arch/s390/kernel/smp.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index a6d85c0a7f20..6ab16ac64d29 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -452,23 +452,27 @@ out: */ int __cpuinit start_secondary(void *cpuvoid) { - /* Setup the cpu */ cpu_init(); preempt_disable(); - /* Enable TOD clock interrupts on the secondary cpu. */ init_cpu_timer(); - /* Enable cpu timer interrupts on the secondary cpu. */ init_cpu_vtimer(); - /* Enable pfault pseudo page faults on this cpu. */ pfault_init(); - /* call cpu notifiers */ notify_cpu_starting(smp_processor_id()); - /* Mark this cpu as online */ ipi_call_lock(); set_cpu_online(smp_processor_id(), true); ipi_call_unlock(); - /* Switch on interrupts */ + __ctl_clear_bit(0, 28); /* Disable lowcore protection */ + S390_lowcore.restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY; + S390_lowcore.restart_psw.addr = + PSW_ADDR_AMODE | (unsigned long) psw_restart_int_handler; + __ctl_set_bit(0, 28); /* Enable lowcore protection */ + /* + * Wait until the cpu which brought this one up marked it + * active before enabling interrupts. + */ + while (!cpumask_test_cpu(smp_processor_id(), cpu_active_mask)) + cpu_relax(); local_irq_enable(); /* cpu_idle will call schedule for us */ cpu_idle(); @@ -507,7 +511,11 @@ static int __cpuinit smp_alloc_lowcore(int cpu) memset((char *)lowcore + 512, 0, sizeof(*lowcore) - 512); lowcore->async_stack = async_stack + ASYNC_SIZE; lowcore->panic_stack = panic_stack + PAGE_SIZE; - + lowcore->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY; + lowcore->restart_psw.addr = + PSW_ADDR_AMODE | (unsigned long) restart_int_handler; + if (user_mode != HOME_SPACE_MODE) + lowcore->restart_psw.mask |= PSW_ASC_HOME; #ifndef CONFIG_64BIT if (MACHINE_HAS_IEEE) { unsigned long save_area; |