Patchwork [2/2] virtio-console: Notify resize to the guest.

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Submitter Kusanagi Kouichi
Date April 16, 2010, 11:42 a.m.
Message ID <20100416114248.A001562C03A@msa106.auone-net.jp>
Download mbox | patch
Permalink /patch/50324/
State New
Headers show

Comments

Kusanagi Kouichi - April 16, 2010, 11:42 a.m.
Signed-off-by: Kusanagi Kouichi <slash@ac.auone-net.jp>
---
 hw/virtio-console.c    |    3 +++
 hw/virtio-serial-bus.c |    8 ++++++++
 hw/virtio-serial.h     |    9 +++++++--
 3 files changed, 18 insertions(+), 2 deletions(-)
Amit Shah - April 16, 2010, 1:02 p.m.
On (Fri) Apr 16 2010 [20:42:47], Kusanagi Kouichi wrote:
> 
> Signed-off-by: Kusanagi Kouichi <slash@ac.auone-net.jp>
> ---
>  hw/virtio-console.c    |    3 +++
>  hw/virtio-serial-bus.c |    8 ++++++++
>  hw/virtio-serial.h     |    9 +++++++--
>  3 files changed, 18 insertions(+), 2 deletions(-)

Hello,

The patches look good. How did you test them?

Just one comment here:

> diff --git a/hw/virtio-serial-bus.c b/hw/virtio-serial-bus.c
> index 17c1ec1..66891ee 100644
> --- a/hw/virtio-serial-bus.c
> +++ b/hw/virtio-serial-bus.c
> @@ -163,6 +163,13 @@ int virtio_serial_close(VirtIOSerialPort *port)
>      return 0;
>  }
>  
> +void virtio_serial_resize(VirtIOSerialPort *port, int rows, int cols)

Would virtio_serial_resize_console() be better, since this is only to be
used for console ports?

		Amit
Kusanagi Kouichi - April 29, 2010, 7:12 a.m.
On 2010-04-16 18:32:19 +0530, Amit Shah wrote:
> On (Fri) Apr 16 2010 [20:42:47], Kusanagi Kouichi wrote:
> > 
> > Signed-off-by: Kusanagi Kouichi <slash@ac.auone-net.jp>
> > ---
> >  hw/virtio-console.c    |    3 +++
> >  hw/virtio-serial-bus.c |    8 ++++++++
> >  hw/virtio-serial.h     |    9 +++++++--
> >  3 files changed, 18 insertions(+), 2 deletions(-)
> 
> Hello,
> 
> The patches look good. How did you test them?
> 
> Just one comment here:
> 
> > diff --git a/hw/virtio-serial-bus.c b/hw/virtio-serial-bus.c
> > index 17c1ec1..66891ee 100644
> > --- a/hw/virtio-serial-bus.c
> > +++ b/hw/virtio-serial-bus.c
> > @@ -163,6 +163,13 @@ int virtio_serial_close(VirtIOSerialPort *port)
> >      return 0;
> >  }
> >  
> > +void virtio_serial_resize(VirtIOSerialPort *port, int rows, int cols)
> 
> Would virtio_serial_resize_console() be better, since this is only to be
> used for console ports?
> 

It is better, I think. I will update the patch. Thanks.


> 		Amit
Amit Shah - April 29, 2010, 10:47 a.m.
On (Thu) Apr 29 2010 [16:12:38], Kusanagi Kouichi wrote:
> On 2010-04-16 18:32:19 +0530, Amit Shah wrote:
> > On (Fri) Apr 16 2010 [20:42:47], Kusanagi Kouichi wrote:
> > > 
> > > Signed-off-by: Kusanagi Kouichi <slash@ac.auone-net.jp>
> > > ---
> > >  hw/virtio-console.c    |    3 +++
> > >  hw/virtio-serial-bus.c |    8 ++++++++
> > >  hw/virtio-serial.h     |    9 +++++++--
> > >  3 files changed, 18 insertions(+), 2 deletions(-)
> > 
> > Hello,
> > 
> > The patches look good. How did you test them?
> > 
> > Just one comment here:
> > 
> > > diff --git a/hw/virtio-serial-bus.c b/hw/virtio-serial-bus.c
> > > index 17c1ec1..66891ee 100644
> > > --- a/hw/virtio-serial-bus.c
> > > +++ b/hw/virtio-serial-bus.c
> > > @@ -163,6 +163,13 @@ int virtio_serial_close(VirtIOSerialPort *port)
> > >      return 0;
> > >  }
> > >  
> > > +void virtio_serial_resize(VirtIOSerialPort *port, int rows, int cols)
> > 
> > Would virtio_serial_resize_console() be better, since this is only to be
> > used for console ports?
> > 
> 
> It is better, I think. I will update the patch. Thanks.

Thanks.

Please include me in the CC when you send it. Also please mention how
you test this feature.

		Amit
Kusanagi Kouichi - April 29, 2010, 12:36 p.m.
On 2010-04-29 16:17:18 +0530, Amit Shah wrote:
> On (Thu) Apr 29 2010 [16:12:38], Kusanagi Kouichi wrote:
> > On 2010-04-16 18:32:19 +0530, Amit Shah wrote:
> > > On (Fri) Apr 16 2010 [20:42:47], Kusanagi Kouichi wrote:
> > > > 
> > > > Signed-off-by: Kusanagi Kouichi <slash@ac.auone-net.jp>
> > > > ---
> > > >  hw/virtio-console.c    |    3 +++
> > > >  hw/virtio-serial-bus.c |    8 ++++++++
> > > >  hw/virtio-serial.h     |    9 +++++++--
> > > >  3 files changed, 18 insertions(+), 2 deletions(-)
> > > 
> > > Hello,
> > > 
> > > The patches look good. How did you test them?
> > > 
> > > Just one comment here:
> > > 
> > > > diff --git a/hw/virtio-serial-bus.c b/hw/virtio-serial-bus.c
> > > > index 17c1ec1..66891ee 100644
> > > > --- a/hw/virtio-serial-bus.c
> > > > +++ b/hw/virtio-serial-bus.c
> > > > @@ -163,6 +163,13 @@ int virtio_serial_close(VirtIOSerialPort *port)
> > > >      return 0;
> > > >  }
> > > >  
> > > > +void virtio_serial_resize(VirtIOSerialPort *port, int rows, int cols)
> > > 
> > > Would virtio_serial_resize_console() be better, since this is only to be
> > > used for console ports?
> > > 
> > 
> > It is better, I think. I will update the patch. Thanks.
> 
> Thanks.
> 
> Please include me in the CC when you send it. Also please mention how
> you test this feature.
> 
> 		Amit

I put printf()s into involved functions. Then ran qemu on a terminal
emulator, and resized it.
That's how I did. Is this what you need?
Amit Shah - April 29, 2010, 12:49 p.m.
On (Thu) Apr 29 2010 [21:36:30], Kusanagi Kouichi wrote:
> > Please include me in the CC when you send it. Also please mention how
> > you test this feature.
> > 
> > 		Amit
> 
> I put printf()s into involved functions. Then ran qemu on a terminal
> emulator, and resized it.
> That's how I did. Is this what you need?

Yes, I'm also wondering if it works ok: as in the guest kernel sees the
updates and resizes the screen accordingly.

		Amit

Patch

diff --git a/hw/virtio-console.c b/hw/virtio-console.c
index bd44ec6..92dd03e 100644
--- a/hw/virtio-console.c
+++ b/hw/virtio-console.c
@@ -58,6 +58,9 @@  static void chr_event(void *opaque, int event)
     case CHR_EVENT_CLOSED:
         virtio_serial_close(&vcon->port);
         break;
+    case CHR_EVENT_RESIZE:
+        virtio_serial_resize(&vcon->port, vcon->chr->rows, vcon->chr->cols);
+        break;
     }
 }
 
diff --git a/hw/virtio-serial-bus.c b/hw/virtio-serial-bus.c
index 17c1ec1..66891ee 100644
--- a/hw/virtio-serial-bus.c
+++ b/hw/virtio-serial-bus.c
@@ -163,6 +163,13 @@  int virtio_serial_close(VirtIOSerialPort *port)
     return 0;
 }
 
+void virtio_serial_resize(VirtIOSerialPort *port, int rows, int cols)
+{
+    port->vser->config.rows = rows;
+    port->vser->config.cols = cols;
+    send_control_event(port, VIRTIO_CONSOLE_RESIZE, 0);
+}
+
 /* Individual ports/apps call this function to write to the guest. */
 ssize_t virtio_serial_write(VirtIOSerialPort *port, const uint8_t *buf,
                             size_t size)
@@ -336,6 +343,7 @@  static void handle_input(VirtIODevice *vdev, VirtQueue *vq)
 static uint32_t get_features(VirtIODevice *vdev, uint32_t features)
 {
     VirtIOSerial *vser = DO_UPCAST(VirtIOSerial, vdev, vdev);
+    features |= (1 << VIRTIO_CONSOLE_F_SIZE);
     if (vser->bus->max_nr_ports > 1) {
         features |= (1 << VIRTIO_CONSOLE_F_MULTIPORT);
     }
diff --git a/hw/virtio-serial.h b/hw/virtio-serial.h
index f297b00..8af83b8 100644
--- a/hw/virtio-serial.h
+++ b/hw/virtio-serial.h
@@ -25,12 +25,12 @@ 
 #define VIRTIO_ID_CONSOLE		3
 
 /* Features supported */
+#define VIRTIO_CONSOLE_F_SIZE		0
 #define VIRTIO_CONSOLE_F_MULTIPORT	1
 
 struct virtio_console_config {
     /*
-     * These two fields are used by VIRTIO_CONSOLE_F_SIZE which
-     * isn't implemented here yet
+     * These two fields are used by VIRTIO_CONSOLE_F_SIZE
      */
     uint16_t cols;
     uint16_t rows;
@@ -160,6 +160,11 @@  int virtio_serial_open(VirtIOSerialPort *port);
 int virtio_serial_close(VirtIOSerialPort *port);
 
 /*
+ * Notify resize to the guest
+ */
+void virtio_serial_resize(VirtIOSerialPort *port, int rows, int cols);
+
+/*
  * Send data to Guest
  */
 ssize_t virtio_serial_write(VirtIOSerialPort *port, const uint8_t *buf,