File qemu-xen-upstream-hvm-pv-support.patch of Package xen.4218

---
 tools/qemu-xen-dir-remote/hw/i386/xen/xen_platform.c |   22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

--- a/tools/qemu-xen-dir-remote/hw/i386/xen/xen_platform.c
+++ b/tools/qemu-xen-dir-remote/hw/i386/xen/xen_platform.c
@@ -312,6 +312,28 @@ static void xen_platform_ioport_writeb(v
     case 0: /* Platform flags */
         platform_fixed_ioport_writeb(opaque, 0, (uint32_t)val);
         break;
+    case 4:
+        if (val == 1 && size == 1) {
+        /*
+         * SUSE unplug for Xenlinux
+         * xen-kmp used this since xen-3.0.4, instead the official protocol from xen-3.3+
+         * It did an unconditional "outl(1, (ioaddr + 4));"
+         * This approach was used until openSUSE 12.3, up to SLE11SP3 and in SLE10.
+         * Starting with openSUSE 13.1, SLE11SP4 and SLE12 the official protocol is used.
+         * pre VMDP 1.7 made use of 4 and 8 depending on how vmdp was configured.
+         * If VMDP was to control both disk and LAN it would use 4.
+         * If it controlled just disk or just LAN, it would use 8 below.
+         */
+            PCIDevice *pci_dev = PCI_DEVICE(s);
+            DPRINTF("unplug disks\n");
+            bdrv_drain_all();
+            bdrv_flush_all();
+            pci_unplug_disks(pci_dev->bus);
+            DPRINTF("unplug nics\n");
+            pci_unplug_nics(pci_dev->bus);
+            DPRINTF("done\n");
+        }
+        break;
     case 8:
         log_writeb(s, (uint32_t)val);
         break;