Re: [Qemu-devel] [PATCH] Keyboard/Mouse Console for vfio with active function x-vga ans -vga none

[Alex Williamson <alex.williamson@redhat.com>]

On Thu, 2014-04-10 at 22:07 +0200, qemu Mailinglist wrote:
> there are many discus about using keyboard and mouse with VGA passthru,
> so I add a graphic_console to vfio.c, like puv3.c.
> I test it with SDL and VNC Access, the Keyboard works, the mouse work
> good without absolute version like "-usbdevice mouse".
> Default it boot with "QEMU PS/2 Mouse", but this is changing to "vmmouse
> (absolute)" at boot time of gast system.
> 
> I hope someone else can test.
> 
> Signed-off-by: Tobias Nannen qemu@suppser.de
> ---
>  hw/misc/vfio.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/hw/misc/vfio.c b/hw/misc/vfio.c
> index 9cf5b84..9294041 100644
> --- a/hw/misc/vfio.c
> +++ b/hw/misc/vfio.c
> @@ -39,6 +39,7 @@
>  #include "qemu/range.h"
>  #include "sysemu/kvm.h"
>  #include "sysemu/sysemu.h"
> +#include "ui/console.h"
>  
>  /* #define DEBUG_VFIO */
>  #ifdef DEBUG_VFIO
> @@ -3586,6 +3587,10 @@ static int vfio_get_device(VFIOGroup *group,
> const char *name, VFIODevice *vdev)
>          QLIST_INIT(&vdev->vga.region[QEMU_PCI_VGA_IO_HI].quirks);
>  
>          vdev->has_vga = true;
> +        if (vga_interface_type == VGA_NONE) {
> +            static const GraphicHwOps no_ops;
> +            graphic_console_init(NULL, 0, &no_ops, NULL);
> +        }
>      }
>      irq_info.index = VFIO_PCI_ERR_IRQ_INDEX;
>  

I don't think vfio is the one to be creating a dummy console, besides
there's no reason you can't have multiple vfio devices with x-vga=on.
There should probably be some dummy console driver so you can add
-device dummy-console to the commandline if this is desired.  Thanks,

Alex