Commit b60c470b authored by Amit Shah's avatar Amit Shah Committed by Anthony Liguori
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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: default avatarAmit Shah <amit.shah@redhat.com>
Signed-off-by: default avatarAnthony Liguori <aliguori@us.ibm.com>
parent f146ec9a

hw/virtio-serial.c

+34 −0
Original line number Diff line number Diff line
@@ -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)