Signed-off-by: Peng Hao <peng.hao2@xxxxxxxxxx>
Reviewed-by: Eduardo Habkost <ehabkost@xxxxxxxxxx>
---
hw/timer/mc146818rtc.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/hw/timer/mc146818rtc.c b/hw/timer/mc146818rtc.c
index 6f1f723..b19ef51 100644
--- a/hw/timer/mc146818rtc.c
+++ b/hw/timer/mc146818rtc.c
@@ -70,6 +70,7 @@ typedef struct RTCState {
ISADevice parent_obj;
MemoryRegion io;
+ MemoryRegion coalesced_io;
uint8_t cmos_data[128];
uint8_t cmos_index;
int32_t base_year;
@@ -990,6 +991,13 @@ static void rtc_realizefn(DeviceState *dev, Error **errp)
memory_region_init_io(&s->io, OBJECT(s), &cmos_ops, s, "rtc", 2);
isa_register_ioport(isadev, &s->io, base);
+ /* register rtc 0x70 port as coalesced_pio */
+ memory_region_set_flush_coalesced(&s->io);
+ memory_region_init_io(&s->coalesced_io, OBJECT(s), &cmos_ops,
+ s, "rtc1", 1);
+ isa_register_ioport(isadev, &s->coalesced_io, base);
+ memory_region_add_coalescing(&s->coalesced_io, 0, 1);
+
qdev_set_legacy_instance_id(dev, base, 3);
qemu_register_reset(rtc_reset, s);
--
1.8.3.1
