sysbus_add_io() just wraps memory_region_add_subregion() while also
obscuring where the memory is attached. So use
memory_region_add_subregion() directly and attach it to the existing
memory region s->mch.address_space_io which is set as an alias to
get_system_io() by the q35 machine.
Signed-off-by: Bernhard Beschow <shen...@gmail.com>
Reviewed-by: Thomas Huth <th...@redhat.com>
---
hw/pci-host/q35.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/hw/pci-host/q35.c b/hw/pci-host/q35.c
index 26390863d6..fa05844319 100644
--- a/hw/pci-host/q35.c
+++ b/hw/pci-host/q35.c
@@ -50,10 +50,12 @@ static void q35_host_realize(DeviceState *dev, Error **errp)
Q35PCIHost *s = Q35_HOST_DEVICE(dev);
SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
- sysbus_add_io(sbd, MCH_HOST_BRIDGE_CONFIG_ADDR, &pci->conf_mem);
+ memory_region_add_subregion(s->mch.address_space_io,
+ MCH_HOST_BRIDGE_CONFIG_ADDR, &pci->conf_mem);
sysbus_init_ioports(sbd, MCH_HOST_BRIDGE_CONFIG_ADDR, 4);
- sysbus_add_io(sbd, MCH_HOST_BRIDGE_CONFIG_DATA, &pci->data_mem);
+ memory_region_add_subregion(s->mch.address_space_io,
+ MCH_HOST_BRIDGE_CONFIG_DATA, &pci->data_mem);
sysbus_init_ioports(sbd, MCH_HOST_BRIDGE_CONFIG_DATA, 4);
/* register q35 0xcf8 port as coalesced pio */
--
2.39.1
