@@ -107,3 +107,41 @@ static void virtcon_register(void)
virtio_serial_port_qdev_register(&virtcon_info);
}
device_init(virtcon_register)
+
+
+/* Generic Virtio Serial Ports */
+static int virtserial_port_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);
+ }
+ return 0;
+}
+
+static VirtIOSerialPortInfo virtserial_port_info = {
+ .qdev.name = "virtserialport",
+ .qdev.size = sizeof(VirtConsole),
+ .init = virtserial_port_initfn,
+ .have_data = flush_buf,
+ .qdev.props = (Property[]) {
+ DEFINE_PROP_CHR("chardev", VirtConsole, chr),
+ DEFINE_PROP_STRING("name", VirtIOSerialPort, name),
+ DEFINE_PROP_INT32("cache_buffers", VirtIOSerialPort, cache_buffers, 1),
+ DEFINE_PROP_UINT64("byte_limit", VirtIOSerialPort, byte_limit, 0),
+ DEFINE_PROP_UINT64("guest_byte_limit", VirtIOSerialPort,
+ guest_byte_limit, 0),
+ DEFINE_PROP_END_OF_LIST(),
+ },
+};
+
+static void virtserial_port_register(void)
+{
+ virtio_serial_port_qdev_register(&virtserial_port_info);
+}
+device_init(virtserial_port_register)
This patch adds generic serial ports over the virtio serial bus. These ports have a few more options that are not relevant for virtio console ports: the ability to cache buffers that are received for a port while it's disconnected, setting of limits to the bytes that are cached so as to prevent OOM conditions, etc. 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. For requirements, use-cases and some history see http://www.linux-kvm.org/page/VMchannel_Requirements Signed-off-by: Amit Shah <amit.shah@redhat.com> --- hw/virtio-console.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 files changed, 38 insertions(+), 0 deletions(-)