i8254: Open-code timer restore
Same as for the APIC: To enable migration between accelerated and
non-accelerated models, we need to arm the channel 0 timer only inside
the emulated PIT model. The common code just saves/restores that timer
to the the next_transition_time field.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/hw/i8254.c b/hw/i8254.c
index 9fde344..77bd5e8 100644
--- a/hw/i8254.c
+++ b/hw/i8254.c
@@ -300,6 +300,17 @@
.old_portio = pit_portio
};
+static void pit_post_load(PITCommonState *s)
+{
+ PITChannelState *sc = &s->channels[0];
+
+ if (sc->next_transition_time != -1) {
+ qemu_mod_timer(sc->irq_timer, sc->next_transition_time);
+ } else {
+ qemu_del_timer(sc->irq_timer);
+ }
+}
+
static int pit_initfn(PITCommonState *pit)
{
PITChannelState *s;
@@ -329,6 +340,7 @@
k->init = pit_initfn;
k->set_channel_gate = pit_set_channel_gate;
k->get_channel_info = pit_get_channel_info_common;
+ k->post_load = pit_post_load;
dc->reset = pit_reset;
dc->props = pit_properties;
}
