Import HyperV Key-Value Pair (KVP) driver and daemon code by Microsoft,

many thanks for their continued support of FreeBSD.

While I'm there, also implement a new build knob, WITHOUT_HYPERV to
disable building and installing of the HyperV utilities when necessary.

The HyperV utilities are only built for i386 and amd64 targets.

This is a stable/10 candidate for inclusion with 10.1-RELEASE.

Submitted by:	Wei Hu <weh microsoft com>
MFC after:	1 week

1 files changed, 29 insertions, 0 deletions

diff --git a/sys/dev/hyperv/include/hyperv.h b/sys/dev/hyperv/include/hyperv.h
index 4257b37..8a45d89 100644
--- a/sys/dev/hyperv/include/hyperv.h
+++ b/sys/dev/hyperv/include/hyperv.h
@@ -795,5 +795,34 @@ hv_get_phys_addr(void *virt)
 	return (ret);
 }
 
+
+/**
+ * KVP related structures
+ * 
+ */
+typedef struct hv_vmbus_service {
+        hv_guid       guid;             /* Hyper-V GUID */
+        char          *name;            /* name of service */
+        boolean_t     enabled;          /* service enabled */
+        hv_work_queue *work_queue;      /* background work queue */
+
+        /*
+         * function to initialize service
+         */
+        int (*init)(struct hv_vmbus_service *);
+
+        /*
+         * function to process Hyper-V messages
+         */
+        void (*callback)(void *);
+} hv_vmbus_service;
+
+extern uint8_t* receive_buffer[];
+extern hv_vmbus_service service_table[];
+
+void hv_kvp_callback(void *context);
+int hv_kvp_init(hv_vmbus_service *serv);
+void hv_kvp_deinit(void);
+
 #endif  /* __HYPERV_H__ */