Index: head/sys/dev/hyperv/vmbus/hv_hv.c
===================================================================
--- head/sys/dev/hyperv/vmbus/hv_hv.c
+++ head/sys/dev/hyperv/vmbus/hv_hv.c
@@ -36,6 +36,7 @@
 #include <sys/malloc.h>
 #include <sys/pcpu.h>
 #include <sys/timetc.h>
+#include <sys/kernel.h>
 #include <machine/bus.h>
 #include <machine/md_var.h>
 #include <vm/vm.h>
@@ -207,8 +208,6 @@
 
 	hv_vmbus_g_context.hypercall_page = virt_addr;
 
-	tc_init(&hv_timecounter); /* register virtual timecount */
-
 	hv_et_init();
 	
 	return (0);
@@ -437,3 +436,14 @@
 	wrmsr(HV_X64_MSR_SIEFP, siefp.as_uint64_t);
 }
 
+static void
+hv_tc_init(void)
+{
+	if (vm_guest != VM_GUEST_HV)
+		return;
+
+	/* register virtual timecounter */
+	tc_init(&hv_timecounter);
+}
+
+SYSINIT(hv_tc_init, SI_SUB_HYPERVISOR, SI_ORDER_FIRST, hv_tc_init, NULL);