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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>
This commit is contained in:
Amit Shah 2010-01-20 00:36:56 +05:30 committed by Anthony Liguori
parent f146ec9a6d
commit b60c470b8d
1 changed files with 34 additions and 0 deletions
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34
hw/virtio-serial.c
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@ -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)