From 10b9626e8866873f047662b6e2ecdccd3235d76d Mon Sep 17 00:00:00 2001
Message-Id: <10b9626e8866873f047662b6e2ecdccd3235d76d@dist-git>
From: Andrea Bolognani <abologna@redhat.com>
Date: Tue, 11 Aug 2015 17:16:10 +0200
Subject: [PATCH] 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.

(cherry picked from commit 344d1675e84be60c024080afd74f0da6d25c5f6b)

Bug: https://bugzilla.redhat.com/show_bug.cgi?id=1250977

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
---
 src/cpu/cpu_ppc64.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/cpu/cpu_ppc64.c b/src/cpu/cpu_ppc64.c
index f24fc41..33fec8b 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);
-- 
2.5.0