[PATCH 13/17] libxl: Add xen-platform device for Q35 machine

["Thierry Escande" <thierry.escande@xxxxxxxxxx>]

Current Xen/QEMU method to control Xen Platform device is done by
setting the 'xen_platform_device' option value that modifies QEMU
emulated machine type, namely xenfv <--> pc.

In order to avoid multiplying machine types, this patch supplies
'-device xen-platform' directly to Qemu. To maintain backward
compatibility with existing Xen/QEMU setups, this is currently only
applicable to q35 machine. i440 emulation uses the old method (xenfv/pc
machine) to control Xen Platform device.

Signed-off-by: Thierry Escande <thierry.escande@xxxxxxxxxx>
---
 tools/libs/light/libxl_dm.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tools/libs/light/libxl_dm.c b/tools/libs/light/libxl_dm.c
index 36f2813cde..a64e4779d0 100644
--- a/tools/libs/light/libxl_dm.c
+++ b/tools/libs/light/libxl_dm.c
@@ -1811,6 +1811,12 @@ static int libxl__build_device_model_args_new(libxl__gc 
*gc,
                 flexarray_append(dm_args, state->dm_runas);
             }
         }
+
+        if (b_info->device_model_machine == LIBXL_DEVICE_MODEL_MACHINE_Q35 &&
+            libxl_defbool_val(b_info->u.hvm.xen_platform_pci)) {
+            flexarray_append(dm_args, "-device");
+            flexarray_append(dm_args, "xen-platform");
+        }
     }
     flexarray_append(dm_args, NULL);
     *args = (char **) flexarray_contents(dm_args);
-- 
2.51.0



--
Thierry Escande | Vates XCP-ng Developer

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