Sysbus devices can be spawned by C code or dynamically via the command line.
In the latter case, we need to be able to find the dynamically created devices
to do things with them.
This patch adds a search helper that makes it easy to look for dynamically
spawned sysbus devices.
Signed-off-by: Alexander Graf <ag...@suse.de>
---
hw/core/sysbus.c | 45 +++++++++++++++++++++++++++++++++++++++++++++
include/hw/sysbus.h | 5 +++++
2 files changed, 50 insertions(+)
diff --git a/hw/core/sysbus.c b/hw/core/sysbus.c
index e55c3c1..19437e6 100644
--- a/hw/core/sysbus.c
+++ b/hw/core/sysbus.c
@@ -24,6 +24,51 @@
static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent);
static char *sysbus_get_fw_dev_path(DeviceState *dev);
+typedef struct SysBusFind {
+ void *opaque;
+ FindSysbusDeviceFunc *func;
+} SysBusFind;
+
+/* Run func() for every sysbus device, traverse the tree for everything else */
+static int find_sysbus_device(Object *obj, void *opaque)
+{
+ SysBusFind *find = opaque;
+ Object *dev;
+ SysBusDevice *sbdev;
+
+ dev = object_dynamic_cast(obj, TYPE_SYS_BUS_DEVICE);
+ sbdev = (SysBusDevice *)dev;
+
+ if (!sbdev) {
+ /* Container, traverse it for children */
+ return object_child_foreach(obj, find_sysbus_device, opaque);
+ }
+
+ find->func(sbdev, find->opaque);
+
+ return 0;
+}
+
+/*
+ * Loop through all dynamically created sysbus devices and call
+ * func() for each instance.
+ */
+void foreach_dynamic_sysbus_device(FindSysbusDeviceFunc *func, void *opaque)
+{
+ Object *container;
+ SysBusFind find = {
+ .func = func,
+ .opaque = opaque,
+ };
+
+ /* Loop through all sysbus devices that were spawened outside the machine
*/
+ container = container_get(qdev_get_machine(), "/peripheral");
+ find_sysbus_device(container, &find);
+ container = container_get(qdev_get_machine(), "/peripheral-anon");
+ find_sysbus_device(container, &find);
+}
+
+
static void system_bus_class_init(ObjectClass *klass, void *data)
{
BusClass *k = BUS_CLASS(klass);
diff --git a/include/hw/sysbus.h b/include/hw/sysbus.h
index 9fb1782..80529ff 100644
--- a/include/hw/sysbus.h
+++ b/include/hw/sysbus.h
@@ -57,6 +57,8 @@ struct SysBusDevice {
pio_addr_t pio[QDEV_MAX_PIO];
};
+typedef int FindSysbusDeviceFunc(SysBusDevice *sbdev, void *opaque);
+
void sysbus_init_mmio(SysBusDevice *dev, MemoryRegion *memory);
MemoryRegion *sysbus_mmio_get_region(SysBusDevice *dev, int n);
void sysbus_init_irq(SysBusDevice *dev, qemu_irq *p);
@@ -72,6 +74,9 @@ void sysbus_add_io(SysBusDevice *dev, hwaddr addr,
MemoryRegion *mem);
MemoryRegion *sysbus_address_space(SysBusDevice *dev);
+/* Call func for every dynamically created sysbus device in the system */
+void foreach_dynamic_sysbus_device(FindSysbusDeviceFunc *func, void *opaque);
+
/* Legacy helper function for creating devices. */
DeviceState *sysbus_create_varargs(const char *name,
hwaddr addr, ...);
--
1.8.1.4
