[Qemu-devel] [PATCH 2/2] virtio-console: Notify resize to the guest.

[Kusanagi Kouichi <slash@ac.auone-net.jp>]

Signed-off-by: Kusanagi Kouichi <slash@ac.auone-net.jp>
---
 hw/virtio-console.c    |    3 +++
 hw/virtio-serial-bus.c |    8 ++++++++
 hw/virtio-serial.h     |    9 +++++++--
 3 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/hw/virtio-console.c b/hw/virtio-console.c
index bd44ec6..92dd03e 100644
--- a/hw/virtio-console.c
+++ b/hw/virtio-console.c
@@ -58,6 +58,9 @@ static void chr_event(void *opaque, int event)
     case CHR_EVENT_CLOSED:
         virtio_serial_close(&vcon->port);
         break;
+    case CHR_EVENT_RESIZE:
+        virtio_serial_resize(&vcon->port, vcon->chr->rows, vcon->chr->cols);
+        break;
     }
 }
 
diff --git a/hw/virtio-serial-bus.c b/hw/virtio-serial-bus.c
index 17c1ec1..66891ee 100644
--- a/hw/virtio-serial-bus.c
+++ b/hw/virtio-serial-bus.c
@@ -163,6 +163,13 @@ int virtio_serial_close(VirtIOSerialPort *port)
     return 0;
 }
 
+void virtio_serial_resize(VirtIOSerialPort *port, int rows, int cols)
+{
+    port->vser->config.rows = rows;
+    port->vser->config.cols = cols;
+    send_control_event(port, VIRTIO_CONSOLE_RESIZE, 0);
+}
+
 /* Individual ports/apps call this function to write to the guest. */
 ssize_t virtio_serial_write(VirtIOSerialPort *port, const uint8_t *buf,
                             size_t size)
@@ -336,6 +343,7 @@ static void handle_input(VirtIODevice *vdev, VirtQueue *vq)
 static uint32_t get_features(VirtIODevice *vdev, uint32_t features)
 {
     VirtIOSerial *vser = DO_UPCAST(VirtIOSerial, vdev, vdev);
+    features |= (1 << VIRTIO_CONSOLE_F_SIZE);
     if (vser->bus->max_nr_ports > 1) {
         features |= (1 << VIRTIO_CONSOLE_F_MULTIPORT);
     }
diff --git a/hw/virtio-serial.h b/hw/virtio-serial.h
index f297b00..8af83b8 100644
--- a/hw/virtio-serial.h
+++ b/hw/virtio-serial.h
@@ -25,12 +25,12 @@
 #define VIRTIO_ID_CONSOLE		3
 
 /* Features supported */
+#define VIRTIO_CONSOLE_F_SIZE		0
 #define VIRTIO_CONSOLE_F_MULTIPORT	1
 
 struct virtio_console_config {
     /*
-     * These two fields are used by VIRTIO_CONSOLE_F_SIZE which
-     * isn't implemented here yet
+     * These two fields are used by VIRTIO_CONSOLE_F_SIZE
      */
     uint16_t cols;
     uint16_t rows;
@@ -160,6 +160,11 @@ int virtio_serial_open(VirtIOSerialPort *port);
 int virtio_serial_close(VirtIOSerialPort *port);
 
 /*
+ * Notify resize to the guest
+ */
+void virtio_serial_resize(VirtIOSerialPort *port, int rows, int cols);
+
+/*
  * Send data to Guest
  */
 ssize_t virtio_serial_write(VirtIOSerialPort *port, const uint8_t *buf,
-- 
1.7.0.4