[QEMU][PATCH v1 1/7] xen: when unplugging emulated devices skip virtio devices

[Vikram Garhwal <vikram.garhwal@xxxxxxx>]

From: Juergen Gross <jgross@xxxxxxxx>

Virtio devices should never be unplugged at boot time, as they are
similar to pci passthrough devices.

Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
Signed-off-by: Vikram Garhwal <vikram.garhwal@xxxxxxx>
---
 hw/i386/xen/xen_platform.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/hw/i386/xen/xen_platform.c b/hw/i386/xen/xen_platform.c
index 17457ff3de..3560eaf8c8 100644
--- a/hw/i386/xen/xen_platform.c
+++ b/hw/i386/xen/xen_platform.c
@@ -28,6 +28,7 @@
 #include "hw/ide/pci.h"
 #include "hw/pci/pci.h"
 #include "migration/vmstate.h"
+#include "hw/virtio/virtio-bus.h"
 #include "net/net.h"
 #include "trace.h"
 #include "sysemu/xen.h"
@@ -132,7 +133,8 @@ static void unplug_nic(PCIBus *b, PCIDevice *d, void *o)
     /* We have to ignore passthrough devices */
     if (pci_get_word(d->config + PCI_CLASS_DEVICE) ==
             PCI_CLASS_NETWORK_ETHERNET
-            && !pci_device_is_passthrough(d)) {
+            && !pci_device_is_passthrough(d)
+            && !qdev_get_child_bus(&d->qdev, TYPE_VIRTIO_BUS)) {
         object_unparent(OBJECT(d));
     }
 }
@@ -208,6 +210,10 @@ static void unplug_disks(PCIBus *b, PCIDevice *d, void 
*opaque)
     /* We have to ignore passthrough devices */
     if (pci_device_is_passthrough(d))
         return;
+    /* Ignore virtio devices */
+    if (qdev_get_child_bus(&d->qdev, TYPE_VIRTIO_BUS)) {
+        return;
+    }
 
     switch (pci_get_word(d->config + PCI_CLASS_DEVICE)) {
     case PCI_CLASS_STORAGE_IDE:
-- 
2.17.1