console: minimal hotplug suport

This patch allows to unbind devices from QemuConsoles, using the new
graphic_console_close() function.  The QemuConsole will show a static
display then, saying the device was unplugged.  When re-plugging a
display later on the QemuConsole will be reused.

Eventually we will allocate and release QemuConsoles dynamically at some
point in the future, that'll need more infrastructure though to notify
user interfaces (gtk, sdl, spice, ...) about QemuConsoles coming and
going.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/ui/console.h b/include/ui/console.h
index 5fca9afcbc..6d2c052068 100644
--- a/include/ui/console.h
+++ b/include/ui/console.h
@@ -386,6 +386,7 @@ QemuConsole *graphic_console_init(DeviceState *dev, uint32_t head,
 void graphic_console_set_hwops(QemuConsole *con,
                                const GraphicHwOps *hw_ops,
                                void *opaque);
+void graphic_console_close(QemuConsole *con);
 
 void graphic_hw_update(QemuConsole *con);
 void graphic_hw_invalidate(QemuConsole *con);
@@ -398,6 +399,7 @@ QemuConsole *qemu_console_lookup_by_index(unsigned int index);
 QemuConsole *qemu_console_lookup_by_device(DeviceState *dev, uint32_t head);
 QemuConsole *qemu_console_lookup_by_device_name(const char *device_id,
                                                 uint32_t head, Error **errp);
+QemuConsole *qemu_console_lookup_unused(void);
 bool qemu_console_is_visible(QemuConsole *con);
 bool qemu_console_is_graphic(QemuConsole *con);
 bool qemu_console_is_fixedsize(QemuConsole *con);