[Bug 1396595] [NEW] Using virt-install fails on ppc64el with "ERROR XML error: No PCI buses available"

[Breno Leitão]

Public bug reported:

Currently, if you don't specify the parameter "--arch=ppc64" to virt-
install, the virt-install will fail as follows:

  $ virt-install  --name breno   --memory 4096 --disk size=500,bus=virtio  --cdrom mini.iso  
  WARNING  CDROM media does not print to the text console by default, so you likely will not see text install output. You might  
    want to use --location.

  Starting install...
  Allocating 'breno.qcow2'                                                                                                               | 500 GB     00:04     
  ERROR    XML error: No PCI buses available
  Domain installation does not appear to have been successful.
  If it was, you can restart your domain by running:
    virsh --connect qemu:///system start breno
  otherwise, please restart your installation.


On the other side, if the option --arch=ppc64 is passed, it works fine. I generated a diff of both XML generated in both cases, and the result is the following (with some unimportant parts removed): 

+    <type arch="ppc64" machine="pseries">hvm</type>
     <boot dev="cdrom"/>
     <boot dev="hd"/>
   </os>
@@ -19,33 +19,33 @@
   <on_reboot>destroy</on_reboot>
   <on_crash>destroy</on_crash>
   <devices>
-    <emulator>/usr/bin/qemu-system-ppc64le</emulator>
+    <emulator>/usr/bin/qemu-system-ppc64</emulator>
     <disk type="file" device="disk">
       <driver name="qemu" type="qcow2"/>
       <driver name="qemu" type="raw"/>
       <source file="/home/brenohl/versions/14.04.2/mini.iso"/>
-      <target dev="hda" bus="ide"/>
+      <target dev="sda" bus="scsi"/>
       <readonly/>
     </disk>
   <vcpu>1</vcpu>
   <os>
-    <type arch="ppc64le">hvm</type>
+    <type arch="ppc64" machine="pseries">hvm</type>
     <boot dev="hd"/>
   </os>
   <features>
@@ -58,19 +58,19 @@
   <on_reboot>restart</on_reboot>
   <on_crash>restart</on_crash>
   <devices>
-    <emulator>/usr/bin/qemu-system-ppc64le</emulator>
+    <emulator>/usr/bin/qemu-system-ppc64</emulator>
     <disk type="file" device="disk">
       <driver name="qemu" type="qcow2"/>
     </disk>
     <disk type="block" device="cdrom">
-      <target dev="hda" bus="ide"/>
+      <target dev="sda" bus="scsi"/>
       <readonly/>
     </disk>

I understand that libvirt should consider ppc64le a ppc64 guests for all
purposes.

** Affects: libvirt (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: ppc64el

** Tags added: ppc64el

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https://bugs.launchpad.net/bugs/1396595

Title:
  Using virt-install fails on ppc64el with "ERROR    XML error: No PCI
  buses available"

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