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[Qemu-devel] [PATCH RFC 1/3] qdev: add device creation priority flag
From: |
Marcel Apfelbaum |
Subject: |
[Qemu-devel] [PATCH RFC 1/3] qdev: add device creation priority flag |
Date: |
Mon, 9 May 2016 20:47:34 +0300 |
Some devices need to be created before others. Add a flag
to DeviceClass and the means to query it.
Signed-off-by: Marcel Apfelbaum <address@hidden>
---
include/hw/qdev-core.h | 13 +++++++++++++
include/monitor/qdev.h | 1 +
qdev-monitor.c | 19 +++++++++++++++++++
3 files changed, 33 insertions(+)
diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h
index 1ce02b2..f885d6c 100644
--- a/include/hw/qdev-core.h
+++ b/include/hw/qdev-core.h
@@ -29,6 +29,13 @@ typedef enum DeviceCategory {
DEVICE_CATEGORY_MAX
} DeviceCategory;
+
+typedef enum DeviceCreationPriority {
+ DEVICE_PRIO_NORMAL,
+ DEVICE_PRIO_BRIDGE,
+ DEVICE_PRIO_HOSTBRIDGE
+} DeviceCreationPriority;
+
typedef int (*qdev_initfn)(DeviceState *dev);
typedef int (*qdev_event)(DeviceState *dev);
typedef void (*qdev_resetfn)(DeviceState *dev);
@@ -139,6 +146,12 @@ typedef struct DeviceClass {
qdev_initfn init; /* TODO remove, once users are converted to realize */
qdev_event exit; /* TODO remove, once users are converted to unrealize */
const char *bus_type;
+
+ /*
+ * Some devices need to be created before others. Devices with higher
+ * priority will be created first.
+ */
+ DeviceCreationPriority creation_priority;
} DeviceClass;
typedef struct NamedGPIOList NamedGPIOList;
diff --git a/include/monitor/qdev.h b/include/monitor/qdev.h
index c4b8a05..7f35ee5 100644
--- a/include/monitor/qdev.h
+++ b/include/monitor/qdev.h
@@ -12,5 +12,6 @@ void qmp_device_add(QDict *qdict, QObject **ret_data, Error
**errp);
int qdev_device_help(QemuOpts *opts);
DeviceState *qdev_device_add(QemuOpts *opts, Error **errp);
+int qdev_device_get_priority(QemuOpts *opts, Error **errp);
#endif
diff --git a/qdev-monitor.c b/qdev-monitor.c
index e19617f..0edba77 100644
--- a/qdev-monitor.c
+++ b/qdev-monitor.c
@@ -626,6 +626,25 @@ DeviceState *qdev_device_add(QemuOpts *opts, Error **errp)
return dev;
}
+int qdev_device_get_priority(QemuOpts *opts, Error **errp)
+{
+ DeviceClass *dc;
+ const char *driver;
+
+ driver = qemu_opt_get(opts, "driver");
+ if (!driver) {
+ error_setg(errp, QERR_MISSING_PARAMETER, "driver");
+ return -1;
+ }
+
+ /* find driver */
+ dc = qdev_get_device_class(&driver, errp);
+ if (!dc) {
+ return -1;
+ }
+
+ return dc->creation_priority;
+}
#define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ##
__VA_ARGS__)
static void qbus_print(Monitor *mon, BusState *bus, int indent);
--
2.4.3