[libvirt] [PATCH v3 18/20] cpu: Forbid model fallback in the ppc64 driver

[Andrea Bolognani]

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.
---
 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 d87e0d1..0f193cd 100644
--- a/src/cpu/cpu_ppc64.c
+++ b/src/cpu/cpu_ppc64.c
@@ -672,6 +672,7 @@ 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);
 
@@ -759,6 +760,7 @@ ppc64DriverBaseline(virCPUDefPtr *cpus,
 
     cpu->type = VIR_CPU_TYPE_GUEST;
     cpu->match = VIR_CPU_MATCH_EXACT;
+    cpu->fallback = VIR_CPU_FALLBACK_FORBID;
 
  cleanup:
     ppc64MapFree(map);
-- 
2.4.3