hyperv/utils: Allow hint to disable individual utility

Reviewed by:	kib, Dexuan Cui <decui microsoft com>
MFC after:	1 week
Sponsored by:	Microsoft OSTC
Differential Revision:	https://reviews.freebsd.org/D5714

4 files changed, 16 insertions, 0 deletions

diff --git a/sys/dev/hyperv/utilities/hv_heartbeat.c b/sys/dev/hyperv/utilities/hv_heartbeat.c
index c1b6da5..09bd28b 100644
--- a/sys/dev/hyperv/utilities/hv_heartbeat.c
+++ b/sys/dev/hyperv/utilities/hv_heartbeat.c
@@ -94,6 +94,10 @@ static int
 hv_heartbeat_probe(device_t dev)
 {
 	const char *p = vmbus_get_type(dev);
+
+	if (resource_disabled("hvheartbeat", 0))
+		return ENXIO;
+
 	if (!memcmp(p, &service_guid, sizeof(hv_guid))) {
 		device_set_desc(dev, "Hyper-V Heartbeat Service");
 		return BUS_PROBE_DEFAULT;
diff --git a/sys/dev/hyperv/utilities/hv_kvp.c b/sys/dev/hyperv/utilities/hv_kvp.c
index 3012a3f..d71310b 100644
--- a/sys/dev/hyperv/utilities/hv_kvp.c
+++ b/sys/dev/hyperv/utilities/hv_kvp.c
@@ -863,6 +863,10 @@ static int
 hv_kvp_probe(device_t dev)
 {
 	const char *p = vmbus_get_type(dev);
+
+	if (resource_disabled("hvkvp", 0))
+		return ENXIO;
+
 	if (!memcmp(p, &service_guid, sizeof(hv_guid))) {
 		device_set_desc(dev, "Hyper-V KVP Service");
 		return BUS_PROBE_DEFAULT;
diff --git a/sys/dev/hyperv/utilities/hv_shutdown.c b/sys/dev/hyperv/utilities/hv_shutdown.c
index 20bc65e..0beed5a 100644
--- a/sys/dev/hyperv/utilities/hv_shutdown.c
+++ b/sys/dev/hyperv/utilities/hv_shutdown.c
@@ -116,6 +116,10 @@ static int
 hv_shutdown_probe(device_t dev)
 {
 	const char *p = vmbus_get_type(dev);
+
+	if (resource_disabled("hvshutdown", 0))
+		return ENXIO;
+
 	if (!memcmp(p, &service_guid, sizeof(hv_guid))) {
 		device_set_desc(dev, "Hyper-V Shutdown Service");
 		return BUS_PROBE_DEFAULT;
diff --git a/sys/dev/hyperv/utilities/hv_timesync.c b/sys/dev/hyperv/utilities/hv_timesync.c
index d1ea904..06580d7 100644
--- a/sys/dev/hyperv/utilities/hv_timesync.c
+++ b/sys/dev/hyperv/utilities/hv_timesync.c
@@ -171,6 +171,10 @@ static int
 hv_timesync_probe(device_t dev)
 {
 	const char *p = vmbus_get_type(dev);
+
+	if (resource_disabled("hvtimesync", 0))
+		return ENXIO;
+
 	if (!memcmp(p, &service_guid, sizeof(hv_guid))) {
 		device_set_desc(dev, "Hyper-V Time Synch Service");
 		return BUS_PROBE_DEFAULT;