[libvirt] [PATCH 2/4] PowerPC : Forbid NULL CPU model with 'host-model' mode.

[Prerna Saxena]

PowerPC : Forbid NULL CPU model with 'host-model' mode in qemu command line.

This ensures that an XML such as following:
...
  <cpu mode='host-model'>
    <model fallback='allow'/>
  </cpu>
...

will not generate a '-cpu host,compat=(null)' command line with qemu-system-ppc64.

Signed-off-by: Prerna Saxena <prerna at linux.vnet.ibm.com>
---
 src/qemu/qemu_command.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 9c25788..317bb19 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -6685,7 +6685,8 @@ qemuBuildCpuModelArgStr(virQEMUDriverPtr driver,
         virBufferAddLit(buf, "host");
 
         if (ARCH_IS_PPC64(def->os.arch) &&
-            cpu->mode == VIR_CPU_MODE_HOST_MODEL) {
+            cpu->mode == VIR_CPU_MODE_HOST_MODEL &&
+            def->cpu->model != NULL) {
             virBufferAsprintf(buf, ",compat=%s", def->cpu->model);
         } else {
             featCpu = cpu;
-- 
1.9.3

-- 
Prerna Saxena

Linux Technology Centre,
IBM Systems and Technology Lab,
Bangalore, India