[Qemu-devel] [RFC v2 17/20] pci: Set device_type on bus classes

[Eduardo Habkost]

The default device_type for for TYPE_PCI_BUS will be
INTERFACE_LEGACY_PCI_DEVICE. The device_type for TYPE_PCIE_BUS
will be INTERFACE_PCIE_DEVICE.

Note that specific bus instances may still override
accepted_device_types. See the comments added to the code.

Signed-off-by: Eduardo Habkost <address@hidden>
---
Changes series v1 -> v2:
* (new patch added to series)
---
 hw/pci/pci.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index 2fc543c..19dc63a 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -152,7 +152,10 @@ static void pci_bus_class_init(ObjectClass *klass, void 
*data)
     k->realize = pci_bus_realize;
     k->unrealize = pci_bus_unrealize;
     k->reset = pcibus_reset;
-    k->device_type = TYPE_PCI_DEVICE;
+    /* note that TYPE_PCIE_BUS is a TYPE_PCI_BUS subclass,
+     * but overrides BusClass::device_type to INTERFACE_PCIE_DEVICE
+     */
+    k->device_type = INTERFACE_LEGACY_PCI_DEVICE;
 
     pbc->is_root = pcibus_is_root;
     pbc->bus_num = pcibus_num;
@@ -177,8 +180,19 @@ static const TypeInfo legacy_pci_interface_info = {
     .parent        = TYPE_INTERFACE,
 };
 
+static void pcie_bus_class_init(ObjectClass *oc, void *opaque)
+{
+    BusClass *bc = BUS_CLASS(oc);
+    /* Note that this is the default value for accepted_device_types,
+     * but specific PCIe bus instances may override it.
+     * (e.g. q35 root bus accepts both legacy and PCIe devices).
+     */
+    bc->device_type = INTERFACE_PCIE_DEVICE;
+}
+
 static const TypeInfo pcie_bus_info = {
     .name = TYPE_PCIE_BUS,
+    .class_init = pcie_bus_class_init,
     .parent = TYPE_PCI_BUS,
 };
 
-- 
2.7.4