[Qemu-devel] [PULL 07/13] console: add ui module loading support

[Gerd Hoffmann <kraxel@redhat.com>]

If a requested user interface is not available, try loading it as
module, simliar to block layer modules.  Needed to keep things working
when followup patches start to build user interfaces as modules.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 20180301100547.18962-8-kraxel@redhat.com
---
 Makefile.objs         | 1 +
 include/qemu/module.h | 1 +
 ui/console.c          | 6 ++++++
 3 files changed, 8 insertions(+)

diff --git a/Makefile.objs b/Makefile.objs
index 5dc134818c..57ca6d908b 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -56,6 +56,7 @@ common-obj-y += hw/
 common-obj-y += replay/
 
 common-obj-y += ui/
+common-obj-m += ui/
 common-obj-y += bt-host.o bt-vhci.o
 bt-host.o-cflags := $(BLUEZ_CFLAGS)
 
diff --git a/include/qemu/module.h b/include/qemu/module.h
index 56dd218205..9fea75aaeb 100644
--- a/include/qemu/module.h
+++ b/include/qemu/module.h
@@ -53,6 +53,7 @@ typedef enum {
 #define trace_init(function) module_init(function, MODULE_INIT_TRACE)
 
 #define block_module_load_one(lib) module_load_one("block-", lib)
+#define ui_module_load_one(lib) module_load_one("ui-", lib)
 
 void register_module_init(void (*fn)(void), module_init_type type);
 void register_dso_module_init(void (*fn)(void), module_init_type type);
diff --git a/ui/console.c b/ui/console.c
index 25d342cdcb..78efab269a 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -2199,6 +2199,9 @@ bool qemu_display_find_default(DisplayOptions *opts)
 
     for (i = 0; i < ARRAY_SIZE(prio); i++) {
         if (dpys[prio[i]] == NULL) {
+            ui_module_load_one(DisplayType_lookup.array[prio[i]]);
+        }
+        if (dpys[prio[i]] == NULL) {
             continue;
         }
         opts->type = prio[i];
@@ -2214,6 +2217,9 @@ void qemu_display_early_init(DisplayOptions *opts)
         return;
     }
     if (dpys[opts->type] == NULL) {
+        ui_module_load_one(DisplayType_lookup.array[opts->type]);
+    }
+    if (dpys[opts->type] == NULL) {
         error_report("Display '%s' is not available.",
                      DisplayType_lookup.array[opts->type]);
         exit(1);
-- 
2.9.3