From: Andrea Bolognani <abologna@redhat.com>
Date: Fri, 7 Aug 2015 15:39:19 +0000 (+0200)
Subject: cpu: Forbid model fallback in the ppc64 driver
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=344d1675e84be60c024080afd74f0da6d25c5f6b;p=libvirt.git

cpu: Forbid model fallback in the ppc64 driver

Unlike what happens on x86, on ppc64 you can't mix and match CPU
features to obtain the guest CPU you want regardless of the host
CPU, so the concept of model fallback doesn't apply.

Make sure CPU definitions emitted by the driver, eg. as output of
the cpuBaseline() and cpuUpdate() calls, reflect this fact.
---

diff --git a/src/cpu/cpu_ppc64.c b/src/cpu/cpu_ppc64.c
index f24fc412ed..33fec8bc56 100644
--- a/src/cpu/cpu_ppc64.c
+++ b/src/cpu/cpu_ppc64.c
@@ -670,6 +670,7 @@ ppc64DriverUpdate(virCPUDefPtr guest,
     case VIR_CPU_MODE_HOST_MODEL:
     case VIR_CPU_MODE_HOST_PASSTHROUGH:
         guest->match = VIR_CPU_MATCH_EXACT;
+        guest->fallback = VIR_CPU_FALLBACK_FORBID;
         virCPUDefFreeModel(guest);
         return virCPUDefCopyModel(guest, host, true);
 
@@ -768,6 +769,7 @@ ppc64DriverBaseline(virCPUDefPtr *cpus,
 
     cpu->type = VIR_CPU_TYPE_GUEST;
     cpu->match = VIR_CPU_MATCH_EXACT;
+    cpu->fallback = VIR_CPU_FALLBACK_FORBID;
 
  cleanup:
     ppc64MapFree(map);