qxl: Add set_client_capabilities() interface to QXLInterface

From: Søren Sandmann Pedersen <ssp@redhat.com>

This new interface lets spice server inform the guest whether

(a) a client is connected
(b) what capabilities the client has

There is a fixed number (464) of bits reserved for capabilities, and
when the capabilities bits change, the QXL_INTERRUPT_CLIENT interrupt
is generated.

Signed-off-by: Soren Sandmann <ssp@redhat.com>
---
 hw/qxl.c |   27 +++++++++++++++++++++++++++
 hw/qxl.h |    2 +-
 2 files changed, 28 insertions(+), 1 deletions(-)

> From: Søren Sandmann Pedersen <ssp@redhat.com>
> 
> This new interface lets spice server inform the guest whether
> 
> (a) a client is connected
> (b) what capabilities the client has
> 
> There is a fixed number (464) of bits reserved for capabilities, and
> when the capabilities bits change, the QXL_INTERRUPT_CLIENT interrupt
> is generated.
> 
> Signed-off-by: Soren Sandmann <ssp@redhat.com>
> ---
>  hw/qxl.c |   27 +++++++++++++++++++++++++++
>  hw/qxl.h |    2 +-
>  2 files changed, 28 insertions(+), 1 deletions(-)
> 
> diff --git a/hw/qxl.c b/hw/qxl.c
> index c2dd3b4..ffe1a76 100644
> --- a/hw/qxl.c
> +++ b/hw/qxl.c
> @@ -901,6 +901,26 @@ static void interface_async_complete(QXLInstance
> *sin, uint64_t cookie_token)
>      }
>  }
>  
> +#if SPICE_SERVER_VERSION >= 0x000b04
> +
> +/* called from spice server thread context only */
> +static void interface_set_client_capabilities(QXLInstance *sin,
> +					      uint8_t client_present,
> +					      uint8_t caps[58])
> +{
> +    PCIQXLDevice *qxl = container_of(sin, PCIQXLDevice, ssd.qxl);
> +
> +    qxl->shadow_rom.client_present = client_present;
> +    memcpy(qxl->shadow_rom.client_capabilities, caps, sizeof(caps));
> +    qxl->rom->client_present = client_present;
> +    memcpy(qxl->rom->client_capabilities, caps, sizeof(caps));
> +    qxl_rom_set_dirty(qxl);
> +
> +    qxl_send_events(qxl, QXL_INTERRUPT_CLIENT);
> +}
> +
> +#endif
> +
>  static const QXLInterface qxl_interface = {
>      .base.type               = SPICE_INTERFACE_QXL,
>      .base.description        = "qxl gpu",
> @@ -922,6 +942,9 @@ static const QXLInterface qxl_interface = {
>      .flush_resources         = interface_flush_resources,
>      .async_complete          = interface_async_complete,
>      .update_area_complete    = interface_update_area_complete,
> +#if SPICE_SERVER_VERSION >= 0x000b04
> +    .set_client_capabilities = interface_set_client_capabilities,
> +#endif
>  };
>  
>  static void qxl_enter_vga_mode(PCIQXLDevice *d)
> @@ -1785,6 +1808,10 @@ static int qxl_init_common(PCIQXLDevice *qxl)
>          io_size = 16;
>          break;
>      case 3: /* qxl-3 */
> +	pci_device_rev = QXL_REVISION_STABLE_V10;
> +	io_size = msb_mask(QXL_IO_RANGE_SIZE * 2 - 1);
> +	break;
> +    case 4:
>      default:
>          pci_device_rev = QXL_DEFAULT_REVISION;
>          io_size = msb_mask(QXL_IO_RANGE_SIZE * 2 - 1);
> diff --git a/hw/qxl.h b/hw/qxl.h
> index 172baf6..98d5a64 100644
> --- a/hw/qxl.h
> +++ b/hw/qxl.h
> @@ -128,7 +128,7 @@ typedef struct PCIQXLDevice {
>          }
>                                                                        \
>      } while (0)
>  
> -#define QXL_DEFAULT_REVISION QXL_REVISION_STABLE_V10
> +#define QXL_DEFAULT_REVISION QXL_REVISION_STABLE_V12

QXL_REVISION_STABLE_V12 is only defined in latest spice-protocol, too new for the qemu required version.

Gerd, maybe it's a good idea to require spice-protocol 0.12.1, now that it's released? this will remove a lot of cruft.

>  
>  /* qxl.c */
>  void *qxl_phys2virt(PCIQXLDevice *qxl, QXLPHYSICAL phys, int
>  group_id);
> --
> 1.7.4
> 
> 
>