* Author(s): Jan Glauber <jan.glauber@de.ibm.com>
*/
-#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/time.h>
#include <linux/notifier.h>
#include <linux/kernel_stat.h>
#include <linux/rcupdate.h>
+#include <linux/posix-timers.h>
#include <asm/s390_ext.h>
#include <asm/timer.h>
+#include <asm/irq_regs.h>
-#define VTIMER_MAGIC (TIMER_MAGIC + 1)
static ext_int_info_t ext_int_info_timer;
DEFINE_PER_CPU(struct vtimer_queue, virt_cpu_timer);
* Update process times based on virtual cpu times stored by entry.S
* to the lowcore fields user_timer, system_timer & steal_clock.
*/
-void account_user_vtime(struct task_struct *tsk)
+void account_tick_vtime(struct task_struct *tsk)
{
cputime_t cputime;
__u64 timer, clock;
if (rcu_pending(smp_processor_id()))
rcu_check_callbacks(smp_processor_id(), rcu_user_flag);
scheduler_tick();
+ run_posix_cpu_timers(tsk);
+}
+
+/*
+ * Update process times based on virtual cpu times stored by entry.S
+ * to the lowcore fields user_timer, system_timer & steal_clock.
+ */
+void account_vtime(struct task_struct *tsk)
+{
+ cputime_t cputime;
+ __u64 timer;
+
+ timer = S390_lowcore.last_update_timer;
+ asm volatile (" STPT %0" /* Store current cpu timer value */
+ : "=m" (S390_lowcore.last_update_timer) );
+ S390_lowcore.system_timer += timer - S390_lowcore.last_update_timer;
+
+ cputime = S390_lowcore.user_timer >> 12;
+ S390_lowcore.user_timer -= cputime << 12;
+ S390_lowcore.steal_clock -= cputime << 12;
+ account_user_time(tsk, cputime);
+
+ cputime = S390_lowcore.system_timer >> 12;
+ S390_lowcore.system_timer -= cputime << 12;
+ S390_lowcore.steal_clock -= cputime << 12;
+ account_system_time(tsk, 0, cputime);
}
/*
struct vtimer_queue *vt_list;
vt_list = &per_cpu(virt_cpu_timer, smp_processor_id());
- set_vtimer(vt_list->idle);
+
+ /* CPU timer interrupt is pending, don't reprogramm it */
+ if (vt_list->idle & 1LL<<63)
+ return;
+
+ if (!list_empty(&vt_list->list))
+ set_vtimer(vt_list->idle);
}
static void stop_cpu_timer(void)
{
- __u64 done;
struct vtimer_queue *vt_list;
vt_list = &per_cpu(virt_cpu_timer, smp_processor_id());
goto fire;
}
- /* store progress */
- asm volatile ("STPT %0" : "=m" (done));
+ /* store the actual expire value */
+ asm volatile ("STPT %0" : "=m" (vt_list->idle));
/*
- * If done is negative we do not stop the CPU timer
- * because we will get instantly an interrupt that
- * will start the CPU timer again.
+ * If the CPU timer is negative we don't reprogramm
+ * it because we will get instantly an interrupt.
*/
- if (done & 1LL<<63)
+ if (vt_list->idle & 1LL<<63)
return;
- else
- vt_list->offset += vt_list->to_expire - done;
- /* save the actual expire value */
- vt_list->idle = done;
+ vt_list->offset += vt_list->to_expire - vt_list->idle;
/*
* We cannot halt the CPU timer, we just write a value that
* Do the callback functions of expired vtimer events.
* Called from within the interrupt handler.
*/
-static void do_callbacks(struct list_head *cb_list, struct pt_regs *regs)
+static void do_callbacks(struct list_head *cb_list)
{
struct vtimer_queue *vt_list;
struct vtimer_list *event, *tmp;
- void (*fn)(unsigned long, struct pt_regs*);
+ void (*fn)(unsigned long);
unsigned long data;
if (list_empty(cb_list))
list_for_each_entry_safe(event, tmp, cb_list, entry) {
fn = event->function;
data = event->data;
- fn(data, regs);
+ fn(data);
if (!event->interval)
/* delete one shot timer */
/*
* Handler for the virtual CPU timer.
*/
-static void do_cpu_timer_interrupt(struct pt_regs *regs, __u16 error_code)
+static void do_cpu_timer_interrupt(__u16 error_code)
{
int cpu;
__u64 next, delta;
list_move_tail(&event->entry, &cb_list);
}
spin_unlock(&vt_list->lock);
- do_callbacks(&cb_list, regs);
+ do_callbacks(&cb_list);
/* next event is first in list */
spin_lock(&vt_list->lock);
void init_virt_timer(struct vtimer_list *timer)
{
- timer->magic = VTIMER_MAGIC;
timer->function = NULL;
INIT_LIST_HEAD(&timer->entry);
spin_lock_init(&timer->lock);
}
EXPORT_SYMBOL(init_virt_timer);
-static inline int check_vtimer(struct vtimer_list *timer)
-{
- if (timer->magic != VTIMER_MAGIC)
- return -EINVAL;
- return 0;
-}
-
static inline int vtimer_pending(struct vtimer_list *timer)
{
return (!list_empty(&timer->entry));
set_vtimer(event->expires);
spin_unlock_irqrestore(&vt_list->lock, flags);
- /* release CPU aquired in prepare_vtimer or mod_virt_timer() */
+ /* release CPU acquired in prepare_vtimer or mod_virt_timer() */
put_cpu();
}
static inline int prepare_vtimer(struct vtimer_list *timer)
{
- if (check_vtimer(timer) || !timer->function) {
+ if (!timer->function) {
printk("add_virt_timer: uninitialized timer\n");
return -EINVAL;
}
unsigned long flags;
int cpu;
- if (check_vtimer(timer) || !timer->function) {
+ if (!timer->function) {
printk("mod_virt_timer: uninitialized timer\n");
return -EINVAL;
}
unsigned long flags;
struct vtimer_queue *vt_list;
- if (check_vtimer(timer)) {
- printk("del_virt_timer: timer not initialized\n");
- return -EINVAL;
- }
-
/* check if timer is pending */
if (!vtimer_pending(timer))
return 0;
git://git.onelab.eu / linux-2.6.git / blobdiff