[Qemu-devel] [PULL 28/29] vga: add default display to machine class

["Michael S. Tsirkin" <mst@redhat.com>]

From: Gerd Hoffmann <kraxel@redhat.com>

This allows machine classes to specify which display device they want
as default.  If unspecified the current behavior (try cirrus, failing
that try stdvga, failing that use no display) will be used.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 include/hw/boards.h | 2 ++
 hw/i386/pc.c        | 1 +
 vl.c                | 5 ++++-
 3 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/include/hw/boards.h b/include/hw/boards.h
index 4429a1e..99a172d 100644
--- a/include/hw/boards.h
+++ b/include/hw/boards.h
@@ -40,6 +40,7 @@ struct QEMUMachine {
     int is_default;
     const char *default_machine_opts;
     const char *default_boot_order;
+    const char *default_display;
     GlobalProperty *compat_props;
     const char *hw_version;
 };
@@ -100,6 +101,7 @@ struct MachineClass {
     int is_default;
     const char *default_machine_opts;
     const char *default_boot_order;
+    const char *default_display;
     GlobalProperty *compat_props;
     const char *hw_version;
 
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index dc2fe6a..1205db8 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1526,6 +1526,7 @@ static void pc_generic_machine_class_init(ObjectClass *oc, void *data)
     mc->is_default = qm->is_default;
     mc->default_machine_opts = qm->default_machine_opts;
     mc->default_boot_order = qm->default_boot_order;
+    mc->default_display = qm->default_display;
     mc->compat_props = qm->compat_props;
     mc->hw_version = qm->hw_version;
 }
diff --git a/vl.c b/vl.c
index 35c1333..2c4ea51 100644
--- a/vl.c
+++ b/vl.c
@@ -1444,6 +1444,7 @@ static void machine_class_init(ObjectClass *oc, void *data)
     mc->is_default = qm->is_default;
     mc->default_machine_opts = qm->default_machine_opts;
     mc->default_boot_order = qm->default_boot_order;
+    mc->default_display = qm->default_display;
     mc->compat_props = qm->compat_props;
     mc->hw_version = qm->hw_version;
 }
@@ -4223,7 +4224,9 @@ int main(int argc, char **argv, char **envp)
 
     /* If no default VGA is requested, the default is "none".  */
     if (default_vga) {
-        if (cirrus_vga_available()) {
+        if (machine_class->default_display) {
+            vga_model = machine_class->default_display;
+        } else if (cirrus_vga_available()) {
             vga_model = "cirrus";
         } else if (vga_available()) {
             vga_model = "std";
-- 
MST