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Diffstat (limited to 'arch/s390/kernel/smp.c')
-rw-r--r--arch/s390/kernel/smp.c24
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;