Re: [Xen-devel] [PATCH] Add device_model_pvdevice parameter for HVM guests

[Paul Durrant <Paul.Durrant@xxxxxxxxxx>]

> -----Original Message-----
> From: Paul Durrant [mailto:paul.durrant@xxxxxxxxxx]
> Sent: 04 July 2013 11:50
> To: xen-devel@xxxxxxxxxxxxx
> Cc: Paul Durrant; Stefano Stabellini
> Subject: [PATCH] Add device_model_pvdevice parameter for HVM guests
> 
> The parameter determines which, if any, xen-pvdevice is specified on the
> QEMU command line. The default value is 'none' which means no argument
> will
> be passed. A value of 'xenserver' specifies a xen-pvdevice with device-id
> 0xc000 (the initial value in the xenserver namespace - see
> docs/misc/pci-device-reservations.txt).
> 
> Signed-off-by: Paul Durrant <paul.durrant@xxxxxxxxxx>
> Cc: Stefano Stabellini <stefano.stabellini@xxxxxxxxxx>

Ping?

> ---
>  docs/man/xl.cfg.pod.5       |   22 ++++++++++++++++++++++
>  tools/libxl/libxl_dm.c      |    9 +++++++++
>  tools/libxl/libxl_types.idl |    5 +++++
>  tools/libxl/xl_cmdimpl.c    |   14 ++++++++++++++
>  4 files changed, 50 insertions(+)
> 
> diff --git a/docs/man/xl.cfg.pod.5 b/docs/man/xl.cfg.pod.5
> index b7d64a6..2220bb6 100644
> --- a/docs/man/xl.cfg.pod.5
> +++ b/docs/man/xl.cfg.pod.5
> @@ -1214,6 +1214,28 @@ you have selected.
> 
>  Assign an XSM security label to the device-model stubdomain.
> 
> +=item B<device_model_pvdevice="PVDEVICE">
> +
> +Selects which variant of the xen-pvdevice should be used for this
> +guest. Valid values are:
> +
> +=over 4
> +
> +=item B<none>
> +
> +The xen-pvdevice should be omitted. This is the default.
> +
> +=item B<xenserver>
> +
> +The xenserver variant of the xen-pvdevice will be specified, enabling
> +the use of XenServer PV drivers in the guest.
> +
> +=back
> +
> +This parameter only takes effect when device_model_version=qemu-xen.
> +
> +=back
> +
>  =item B<device_model_args=[ "ARG", "ARG", ...]>
> 
>  Pass additional arbitrary options on the device-model command
> diff --git a/tools/libxl/libxl_dm.c b/tools/libxl/libxl_dm.c
> index ac1f90e..2924298 100644
> --- a/tools/libxl/libxl_dm.c
> +++ b/tools/libxl/libxl_dm.c
> @@ -647,6 +647,15 @@ static char **
> libxl__build_device_model_args_new(libxl__gc *gc,
>              flexarray_append(dm_args, "-drive");
>              flexarray_append(dm_args, drive);
>          }
> +
> +        switch (b_info->u.hvm.device_model_pvdevice) {
> +        case LIBXL_DEVICE_MODEL_PVDEVICE_XENSERVER:
> +            flexarray_append(dm_args, "-device");
> +            flexarray_append(dm_args, "xen-pvdevice,device-id=0xc000");
> +            break;
> +        default:
> +            break;
> +        }
>      }
>      flexarray_append(dm_args, NULL);
>      return (char **) flexarray_contents(dm_args);
> diff --git a/tools/libxl/libxl_types.idl b/tools/libxl/libxl_types.idl
> index d218a2d..7165139 100644
> --- a/tools/libxl/libxl_types.idl
> +++ b/tools/libxl/libxl_types.idl
> @@ -132,6 +132,10 @@ libxl_vga_interface_type =
> Enumeration("vga_interface_type", [
>      (2, "STD"),
>      ], init_val = 0)
> 
> +libxl_device_model_pvdevice = Enumeration("device_model_pvdevice", [
> +    (0, "NONE"),
> +    (1, "XENSERVER"),
> +    ])
>  #
>  # Complex libxl types
>  #
> @@ -332,6 +336,7 @@ libxl_domain_build_info =
> Struct("domain_build_info",[
>                                         ("soundhw",          string),
>                                         ("xen_platform_pci", libxl_defbool),
>                                         ("usbdevice_list",   
> libxl_string_list),
> +                                       ("device_model_pvdevice",
> libxl_device_model_pvdevice),
>                                         ])),
>                   ("pv", Struct(None, [("kernel", string),
>                                        ("slack_memkb", MemKB),
> diff --git a/tools/libxl/xl_cmdimpl.c b/tools/libxl/xl_cmdimpl.c
> index 8a478ba..cfaa54e 100644
> --- a/tools/libxl/xl_cmdimpl.c
> +++ b/tools/libxl/xl_cmdimpl.c
> @@ -1526,6 +1526,20 @@ skip_vfb:
>              exit (1);
> 
>          }
> +
> +        if (!xlu_cfg_get_string (config, "device_model_pvdevice", &buf, 0)) {
> +            libxl_device_model_pvdevice d;
> +
> +            e = libxl_device_model_pvdevice_from_string(buf, &d);
> +            if (e) {
> +                fprintf(stderr,
> +                        "xl: unknown device_model_pvdevice '%s'\n",
> +                        buf);
> +                exit(-ERROR_FAIL);
> +            }
> +
> +            b_info->u.hvm.device_model_pvdevice = d;
> +        }
>      }
> 
>      xlu_cfg_destroy(config);
> --
> 1.7.10.4


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