tests: avoid probing host CPU from bhyve test

bhyveargv2xmlmock calls virBhyveCapsBuild which in turn
calls virCPUProbeHost, probing the real host CPU. This
causes a test failure if the host CPU happens to contain
the 'arch-capabilities' feature as it triggers a call
to virHostCPUGetMSR() which fails on FreeBSD.

Fortunately we already have convenient code for mocking
the host CPU probing.

Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

src/cpu/cpu.h

@@ -193,7 +193,7 @@ virCPUGetHost(virArch arch,
               virDomainCapsCPUModelsPtr models);
 
 virCPUDefPtr
-virCPUProbeHost(virArch arch);
+virCPUProbeHost(virArch arch) G_GNUC_NO_INLINE;
 
 virCPUDefPtr
 virCPUBaseline(virArch arch,

tests/bhyveargv2xmlmock.c

@@ -2,7 +2,9 @@
 
 #include "virnetdev.h"
 #include "internal.h"
+#include "testutilshostcpus.h"
 #include "util/viruuid.h"
+#include "cpu/cpu.h"
 
 #define VIR_FROM_THIS VIR_FROM_BHYVE
 
@@ -25,3 +27,9 @@ virUUIDGenerate(unsigned char *uuid)
         return -1;
     return 0;
 }
+
+virCPUDefPtr
+virCPUProbeHost(virArch arch)
+{
+    return testUtilsHostCpusGetDefForArch(arch);
+}