ppc: Disallow ide interface.

qemu-system-ppc64 lets you add the IDE interface to the appliance, but
the appliance kernel ignores it (and consequently can't find the
appliance disk so it all goes wrong).  Best to just disallow this.

Also skip tests that try using iface = 'ide'.

src/launch-direct.c

@@ -409,9 +409,9 @@ launch_direct (guestfs_h *g, void *datav, const char *arg)
      */
     if (drv->iface && STREQ (drv->iface, "virtio")) /* virtio-blk */
       goto virtio_blk;
-#ifdef __arm__
+#if defined(__arm__) || defined(__powerpc__)
     else if (drv->iface && STREQ (drv->iface, "ide")) {
-      error (g, "'ide' interface does not work on ARM");
+      error (g, "'ide' interface does not work on ARM or PowerPC");
       goto cleanup0;
     }
 #endif

tests/regressions/rhbz690819.sh

@@ -33,6 +33,10 @@ if [[ "$arch" =~ ^arm ]]; then
     echo "$0: test skipped because ARM does not support 'ide' interface."
     exit 77
 fi
+if [[ "$arch" =~ ^ppc ]]; then
+    echo "$0: test skipped because PowerPC does not support 'ide' interface."
+    exit 77
+fi
 
 backend="$(../../fish/guestfish get-backend)"
 if [[ "$backend" =~ ^libvirt ]]; then

tests/regressions/rhbz975797.sh

@@ -33,6 +33,10 @@ if [[ "$arch" =~ ^arm ]]; then
     echo "$0: test skipped because ARM does not support 'ide' interface."
     exit 77
 fi
+if [[ "$arch" =~ ^ppc ]]; then
+    echo "$0: test skipped because PowerPC does not support 'ide' interface."
+    exit 77
+fi
 
 backend="$(../../fish/guestfish get-backend)"
 if [[ "$backend" =~ ^libvirt ]]; then