From fcb66d7ac2271bcf0b46d6b1ae2d3db38e78bf2b Mon Sep 17 00:00:00 2001

From: Amit Shah <amit.shah@redhat.com>

Date: Wed, 20 Jan 2010 00:36:56 +0530

Subject: [PATCH 6/9] virtio-serial: Add a 'virtserialport' device for generic serial port support

This commit adds a simple chardev-based serial port. Any data the guest

sends is forwarded to the chardev and vice-versa.

Sample uses for such a device can be obtaining info from the guest like

the file systems used, apps installed, etc. for offline usage and

logged-in users, clipboard copy-paste, etc. for online usage.

Signed-off-by: Amit Shah <amit.shah@redhat.com>

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

---

 hw/virtio-serial.c |   34 ++++++++++++++++++++++++++++++++++

 1 files changed, 34 insertions(+), 0 deletions(-)

diff --git a/hw/virtio-serial.c b/hw/virtio-serial.c

index 9c2c93c..bd44ec6 100644

--- a/hw/virtio-serial.c

+++ b/hw/virtio-serial.c

@@ -110,3 +110,37 @@ static void virtconsole_register(void)

     virtio_serial_port_qdev_register(&virtconsole_info);

 }

 device_init(virtconsole_register)

+

+/* Generic Virtio Serial Ports */

+static int virtserialport_initfn(VirtIOSerialDevice *dev)

+{

+    VirtIOSerialPort *port = DO_UPCAST(VirtIOSerialPort, dev, &dev->qdev);

+    VirtConsole *vcon = DO_UPCAST(VirtConsole, port, port);

+

+    port->info = dev->info;

+

+    if (vcon->chr) {

+        qemu_chr_add_handlers(vcon->chr, chr_can_read, chr_read, chr_event,

+                              vcon);

+        port->info->have_data = flush_buf;

+    }

+    return 0;

+}

+

+static VirtIOSerialPortInfo virtserialport_info = {

+    .qdev.name     = "virtserialport",

+    .qdev.size     = sizeof(VirtConsole),

+    .init          = virtserialport_initfn,

+    .exit          = virtconsole_exitfn,

+    .qdev.props = (Property[]) {

+        DEFINE_PROP_CHR("chardev", VirtConsole, chr),

+        DEFINE_PROP_STRING("name", VirtConsole, port.name),

+        DEFINE_PROP_END_OF_LIST(),

+    },

+};

+

+static void virtserialport_register(void)

+{

+    virtio_serial_port_qdev_register(&virtserialport_info);

+}

+device_init(virtserialport_register)

-- 

1.6.2.5