apply range timer to HVM virtual periodic timer and platform time overflow timer
Signed-off-by: Yu Ke <ke.yu@xxxxxxxxx>
diff -r 451e20f880a0 xen/arch/x86/hvm/vpt.c
--- a/xen/arch/x86/hvm/vpt.c
+++ b/xen/arch/x86/hvm/vpt.c
@@ -24,6 +24,8 @@
#define mode_is(d, name) \
((d)->arch.hvm_domain.params[HVM_PARAM_TIMER_MODE] == HVMPTM_##name)
+
+#define MIN(x,y) (((x)<(y))?(x):(y))
void hvm_init_guest_time(struct domain *d)
{
@@ -185,7 +187,8 @@ void pt_restore_timer(struct vcpu *v)
list_for_each_entry ( pt, head, list )
{
pt_process_missed_ticks(pt);
- set_timer(&pt->timer, pt->scheduled);
+ set_range_timer( &pt->timer, pt->scheduled,
+ pt->scheduled + MIN(pt->period/8, MILLISECS(1)) );
}
pt_thaw_time(v);
@@ -206,7 +209,8 @@ static void pt_timer_fn(void *data)
{
pt->scheduled += pt->period;
pt_process_missed_ticks(pt);
- set_timer(&pt->timer, pt->scheduled);
+ set_range_timer( &pt->timer, pt->scheduled,
+ pt->scheduled + MIN(pt->period/8, MILLISECS(1)) );
}
vcpu_kick(pt->vcpu);
@@ -335,7 +339,8 @@ void pt_reset(struct vcpu *v)
pt->pending_intr_nr = 0;
pt->last_plt_gtime = hvm_get_guest_time(pt->vcpu);
pt->scheduled = NOW() + pt->period;
- set_timer(&pt->timer, pt->scheduled);
+ set_range_timer(&pt->timer, pt->scheduled,
+ pt->scheduled + MIN(pt->period/8, MILLISECS(1)) );
}
spin_unlock(&v->arch.hvm_vcpu.tm_lock);
@@ -398,7 +403,8 @@ void create_periodic_time(
list_add(&pt->list, &v->arch.hvm_vcpu.tm_list);
init_timer(&pt->timer, pt_timer_fn, pt, v->processor);
- set_timer(&pt->timer, pt->scheduled);
+ set_range_timer( &pt->timer, pt->scheduled,
+ pt->scheduled + MIN(pt->period/8, MILLISECS(1)) );
spin_unlock(&v->arch.hvm_vcpu.tm_lock);
}
diff -r 451e20f880a0 xen/arch/x86/time.c
--- a/xen/arch/x86/time.c
+++ b/xen/arch/x86/time.c
@@ -508,7 +508,9 @@ static void plt_overflow(void *unused)
plt_stamp = count;
spin_unlock_irq(&platform_timer_lock);
- set_timer(&plt_overflow_timer, NOW() + plt_overflow_period);
+ set_range_timer( &plt_overflow_timer,
+ NOW() + plt_overflow_period - plt_overflow_period/8,
+ NOW() + plt_overflow_period );
}
static s_time_t __read_platform_stime(u64 platform_time)
range-timer-use.patch
Description: range-timer-use.patch
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