[Xen-devel] [PATCH] xen: use a common function for pv and hvm guest backend register calls

[Juergen Gross <jgross@xxxxxxxx>]

Instead of calling xen_be_register() for each supported backend type
for hvm and pv guests in their machine init functions use a common
function in order not to have to add new backends twice.

This at once fixes the error that hvm domains couldn't use the qusb
backend.

Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
---
Is it on purpose the qnic and vfb backends are not registered for HVM?
---
 hw/xen/xen_backend.c         | 10 ++++++++++
 hw/xenpv/xen_machine_pv.c    |  7 +------
 include/hw/xen/xen_backend.h |  1 +
 xen-hvm.c                    |  4 +---
 4 files changed, 13 insertions(+), 9 deletions(-)

diff --git a/hw/xen/xen_backend.c b/hw/xen/xen_backend.c
index bab79b1..1b88891 100644
--- a/hw/xen/xen_backend.c
+++ b/hw/xen/xen_backend.c
@@ -800,6 +800,16 @@ int xen_be_register(const char *type, struct XenDevOps 
*ops)
     return xenstore_scan(type, xen_domid, ops);
 }
 
+void xen_be_register_common(void)
+{
+    xen_be_register("console", &xen_console_ops);
+    xen_be_register("vkbd", &xen_kbdmouse_ops);
+    xen_be_register("qdisk", &xen_blkdev_ops);
+#ifdef CONFIG_USB_LIBUSB
+    xen_be_register("qusb", &xen_usb_ops);
+#endif
+}
+
 int xen_be_bind_evtchn(struct XenDevice *xendev)
 {
     if (xendev->local_port != -1) {
diff --git a/hw/xenpv/xen_machine_pv.c b/hw/xenpv/xen_machine_pv.c
index 48f725c..79aef4e 100644
--- a/hw/xenpv/xen_machine_pv.c
+++ b/hw/xenpv/xen_machine_pv.c
@@ -67,14 +67,9 @@ static void xen_init_pv(MachineState *machine)
         break;
     }
 
-    xen_be_register("console", &xen_console_ops);
-    xen_be_register("vkbd", &xen_kbdmouse_ops);
+    xen_be_register_common();
     xen_be_register("vfb", &xen_framebuffer_ops);
-    xen_be_register("qdisk", &xen_blkdev_ops);
     xen_be_register("qnic", &xen_netdev_ops);
-#ifdef CONFIG_USB_LIBUSB
-    xen_be_register("qusb", &xen_usb_ops);
-#endif
 
     /* configure framebuffer */
     if (xenfb_enabled) {
diff --git a/include/hw/xen/xen_backend.h b/include/hw/xen/xen_backend.h
index 754c0a4..0df282a 100644
--- a/include/hw/xen/xen_backend.h
+++ b/include/hw/xen/xen_backend.h
@@ -87,6 +87,7 @@ void xen_be_check_state(struct XenDevice *xendev);
 
 /* xen backend driver bits */
 int xen_be_init(void);
+void xen_be_register_common(void);
 int xen_be_register(const char *type, struct XenDevOps *ops);
 int xen_be_set_state(struct XenDevice *xendev, enum xenbus_state state);
 int xen_be_bind_evtchn(struct XenDevice *xendev);
diff --git a/xen-hvm.c b/xen-hvm.c
index eb57792..3b0343a 100644
--- a/xen-hvm.c
+++ b/xen-hvm.c
@@ -1318,9 +1318,7 @@ void xen_hvm_init(PCMachineState *pcms, MemoryRegion 
**ram_memory)
         error_report("xen backend core setup failed");
         goto err;
     }
-    xen_be_register("console", &xen_console_ops);
-    xen_be_register("vkbd", &xen_kbdmouse_ops);
-    xen_be_register("qdisk", &xen_blkdev_ops);
+    xen_be_register_common();
     xen_read_physmap(state);
     return;
 
-- 
2.6.6


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
https://lists.xen.org/xen-devel