target-ppc: Error out for -cpu host on unknown PVR

Previously we silently exited, with subclasses we got an opcode warning.
Instead, explicitly tell the user what's wrong.

An indication for this is -cpu ? showing "host" with an all-zero PVR.

Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Alexander Graf <agraf@suse.de>

diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c
index ce7d69b403eb8756227291dc478201c0e0ab6beb..4846acfc0d6414d305ba41bf5e0935a2033886be 100644 (file)
--- a/target-ppc/kvm.c
+++ b/target-ppc/kvm.c
@@ -1232,7 +1232,15 @@ static void alter_insns(uint64_t *word, uint64_t flags, bool on)
 
 static void kvmppc_host_cpu_initfn(Object *obj)
 {
+    PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(obj);
+
     assert(kvm_enabled());
+
+    if (pcc->info->pvr != mfpvr()) {
+        fprintf(stderr, "Your host CPU is unsupported.\n"
+                "Please choose a supported model instead, see -cpu ?.\n");
+        exit(1);
+    }
 }
 
 static void kvmppc_host_cpu_class_init(ObjectClass *oc, void *data)