[Qemu-devel] [PATCH 2/4] virtio-serial: Add description fields for qdev properties

[Amit Shah]

Document the parameters for the virtserialport and virtioconsole
devices.

Example:

$ ./x86_64-softmmu/qemu-system-x86_64 -device virtserialport,?
virtserialport.nr=uint32, The 'number' for the port for \
predictable port numbers. Use this to spawn ports if you \
plan to migrate the guest.

virtserialport.chardev=chr, The chardev to associate this port with.

virtserialport.name=string, Name for the port that's exposed to \
the guest for port discovery.

Signed-off-by: Amit Shah <address@hidden>
---
 hw/virtio-console.c |   17 ++++++++++-------
 hw/virtio-serial.h  |   13 +++++++++++++
 2 files changed, 23 insertions(+), 7 deletions(-)

diff --git a/hw/virtio-console.c b/hw/virtio-console.c
index ccd277a..8a99a99 100644
--- a/hw/virtio-console.c
+++ b/hw/virtio-console.c
@@ -95,11 +95,13 @@ static VirtIOSerialPortInfo virtconsole_info = {
     .init          = virtconsole_initfn,
     .exit          = virtconsole_exitfn,
     .qdev.props = (Property[]) {
-        DEFINE_PROP_UINT8("is_console", VirtConsole, port.is_console, 1, ""),
+        DEFINE_PROP_UINT8("is_console", VirtConsole, port.is_console, 1,
+                          PROP_VIRTSERIAL_IS_CONSOLE_DESC),
         DEFINE_PROP_UINT32("nr", VirtConsole, port.id, VIRTIO_CONSOLE_BAD_ID,
-                           ""),
-        DEFINE_PROP_CHR("chardev", VirtConsole, chr, ""),
-        DEFINE_PROP_STRING("name", VirtConsole, port.name, ""),
+                           PROP_VIRTSERIAL_NR_DESC),
+        DEFINE_PROP_CHR("chardev", VirtConsole, chr, PROP_VIRTSERIAL_CHR_DESC),
+        DEFINE_PROP_STRING("name", VirtConsole, port.name,
+                           PROP_VIRTSERIAL_NAME_DESC),
         DEFINE_PROP_END_OF_LIST(),
     },
 };
@@ -133,9 +135,10 @@ static VirtIOSerialPortInfo virtserialport_info = {
     .exit          = virtconsole_exitfn,
     .qdev.props = (Property[]) {
         DEFINE_PROP_UINT32("nr", VirtConsole, port.id, VIRTIO_CONSOLE_BAD_ID,
-                           ""),
-        DEFINE_PROP_CHR("chardev", VirtConsole, chr, ""),
-        DEFINE_PROP_STRING("name", VirtConsole, port.name, ""),
+                           PROP_VIRTSERIAL_NR_DESC),
+        DEFINE_PROP_CHR("chardev", VirtConsole, chr, PROP_VIRTSERIAL_CHR_DESC),
+        DEFINE_PROP_STRING("name", VirtConsole, port.name,
+                           PROP_VIRTSERIAL_NAME_DESC),
         DEFINE_PROP_END_OF_LIST(),
     },
 };
diff --git a/hw/virtio-serial.h b/hw/virtio-serial.h
index ff08c40..187d5e4 100644
--- a/hw/virtio-serial.h
+++ b/hw/virtio-serial.h
@@ -57,6 +57,19 @@ struct virtio_console_control {
 
 /* == In-qemu interface == */
 
+#define PROP_VIRTSERIAL_IS_CONSOLE_DESC                                 \
+    "An hvc console will be spawned in the guest if this is set."
+
+#define PROP_VIRTSERIAL_NR_DESC                                         \
+    "The 'number' for the port for predictable port numbers. Use this to " \
+    "spawn ports if you plan to migrate the guest."
+
+#define PROP_VIRTSERIAL_CHR_DESC                \
+    "The chardev to associate this port with."
+
+#define PROP_VIRTSERIAL_NAME_DESC                \
+    "Name for the port that's exposed to the guest for port discovery."
+
 typedef struct VirtIOSerial VirtIOSerial;
 typedef struct VirtIOSerialBus VirtIOSerialBus;
 typedef struct VirtIOSerialPort VirtIOSerialPort;
-- 
1.7.3.2