Recent virtio refactoring in QEMU made virtio-bus become the parent bus
of scsi-bus, and virtio-bus doesn't have get_fw_dev_path implementation,
typename will be added to fw_dev_path by default, the new fw_dev_path
could not be identified by seabios. It causes that bootindex parameter
of scsi device doesn't work.
This patch implements get_fw_dev_path() in BusClass, it will be called
if bus doesn't implement the method, tyename will be added to
fw_dev_path. If the implemented method returns NULL, nothing will be
added to fw_dev_path.
It also implements virtio_bus_get_fw_dev_path() to return NULL. Then
QEMU will still pass original style of fw_dev_path to seabios.
Signed-off-by: Amos Kong <address@hidden>
--
v2: only add nothing to fw_dev_path when get_fw_dev_path() is
implemented and returns NULL. then it will not effect other devices
don't have get_fw_dev_path() implementation.
v3: implement default get_fw_dev_path() in BusClass
---
hw/core/qdev.c | 10 +++++++++-
hw/virtio/virtio-bus.c | 6 ++++++
2 files changed, 15 insertions(+), 1 deletion(-)
diff --git a/hw/core/qdev.c b/hw/core/qdev.c
index 6985ad8..9190a7e 100644
--- a/hw/core/qdev.c
+++ b/hw/core/qdev.c
@@ -515,7 +515,7 @@ static int qdev_get_fw_dev_path_helper(DeviceState *dev,
char *p, int size)
l += snprintf(p + l, size - l, "%s", d);
g_free(d);
} else {
- l += snprintf(p + l, size - l, "%s",
object_get_typename(OBJECT(dev)));
+ return l;
}
}
l += snprintf(p + l , size - l, "/");
@@ -867,9 +867,17 @@ static void qbus_initfn(Object *obj)
QTAILQ_INIT(&bus->children);
}
+static char *default_bus_get_fw_dev_path(DeviceState *dev)
+{
+ return g_strdup(object_get_typename(OBJECT(dev)));
+}
+
static void bus_class_init(ObjectClass *class, void *data)
{
+ BusClass *bc = BUS_CLASS(class);
+
class->unparent = bus_unparent;
+ bc->get_fw_dev_path = default_bus_get_fw_dev_path;
}
static void qbus_finalize(Object *obj)
diff --git a/hw/virtio/virtio-bus.c b/hw/virtio/virtio-bus.c
index ea2e11a..6849a01 100644
--- a/hw/virtio/virtio-bus.c
+++ b/hw/virtio/virtio-bus.c
@@ -161,10 +161,16 @@ static char *virtio_bus_get_dev_path(DeviceState *dev)
return qdev_get_dev_path(proxy);
}
+static char *virtio_bus_get_fw_dev_path(DeviceState *dev)
+{
+ return NULL;
+}
+
static void virtio_bus_class_init(ObjectClass *klass, void *data)
{
BusClass *bus_class = BUS_CLASS(klass);
bus_class->get_dev_path = virtio_bus_get_dev_path;
+ bus_class->get_fw_dev_path = virtio_bus_get_fw_dev_path;
}
static const TypeInfo virtio_bus_info = {