virtio-gpu: build modular

Only build virtio-gpu-device modular (the code which actually depends on
the external virglrenderer library).  virtio-gpu-pci and virtio-vga are
compiled into core qemu still.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 20200914134224.29769-7-kraxel@redhat.com

2 files changed, 8 insertions, 16 deletions

diff --git a/hw/display/meson.build b/hw/display/meson.build
index 2f07d427dd..0d5ddecd65 100644
--- a/hw/display/meson.build
+++ b/hw/display/meson.build
@@ -59,24 +59,14 @@ if config_all_devices.has_key('CONFIG_VIRTIO_GPU')
   virtio_gpu_ss.add(when: 'CONFIG_VIRTIO_GPU',
                     if_true: [files('virtio-gpu-base.c', 'virtio-gpu.c', 'virtio-gpu-3d.c'), pixman, virgl])
   virtio_gpu_ss.add(when: 'CONFIG_VHOST_USER_GPU', if_true: files('vhost-user-gpu.c'))
-  virtio_gpu_ss.add(when: ['CONFIG_VIRTIO_GPU', 'CONFIG_VIRTIO_PCI'], if_true: files('virtio-gpu-pci.c'))
-  virtio_gpu_ss.add(when: ['CONFIG_VHOST_USER_GPU', 'CONFIG_VIRTIO_PCI'], if_true: files('vhost-user-gpu-pci.c'))
-  virtio_gpu_ss.add(when: 'CONFIG_VIRTIO_VGA', if_true: files('virtio-vga.c'))
-  virtio_gpu_ss.add(when: 'CONFIG_VHOST_USER_VGA', if_true: files('vhost-user-vga.c'))
-
-  # FIXME: this was attempted in the Makefile build system; it was then reverted
-  # as it would try to load all devices when the module is loaded, even if
-  # config_devices for this target only has some of them.  Since virtio-gpu-pci
-  # and virtio-vga both instantiate a virtio-gpu-device, fixing it probably does
-  # not even require a dependency system, just splitting the module in three
-  # for CONFIG_VIRTIO_GPU/CONFIG_VHOST_USER_GPU, CONFIG_VIRTIO_PCI and
-  # CONFIG_VIRTIO_VGA/CONFIG_VHOST_USER_VGA.
-  # Sourcesets are a dime a dozen, so keep it and just disable module builds.
-
-  #hw_display_modules += {'virtio-gpu': virtio_gpu_ss}
-  softmmu_ss.add_all(virtio_gpu_ss)
+  hw_display_modules += {'virtio-gpu': virtio_gpu_ss}
 endif
 
+softmmu_ss.add(when: ['CONFIG_VIRTIO_GPU', 'CONFIG_VIRTIO_PCI'], if_true: files('virtio-gpu-pci.c'))
+softmmu_ss.add(when: ['CONFIG_VHOST_USER_GPU', 'CONFIG_VIRTIO_PCI'], if_true: files('vhost-user-gpu-pci.c'))
+softmmu_ss.add(when: 'CONFIG_VIRTIO_VGA', if_true: files('virtio-vga.c'))
+softmmu_ss.add(when: 'CONFIG_VHOST_USER_VGA', if_true: files('vhost-user-vga.c'))
+
 specific_ss.add(when: [x11, opengl, 'CONFIG_MILKYMIST_TMU2'], if_true: files('milkymist-tmu2.c'))
 specific_ss.add(when: 'CONFIG_OMAP', if_true: files('omap_lcdc.c'))
 
diff --git a/util/module.c b/util/module.c
index 6e63006a8f..34772e7d87 100644
--- a/util/module.c
+++ b/util/module.c
@@ -265,6 +265,8 @@ static struct {
     { "usb-redir",             "hw-", "usb-redirect"          },
     { "qxl-vga",               "hw-", "display-qxl"           },
     { "qxl",                   "hw-", "display-qxl"           },
+    { "virtio-gpu-device",     "hw-", "display-virtio-gpu"    },
+    { "vhost-user-gpu",        "hw-", "display-virtio-gpu"    },
     { "chardev-braille",       "chardev-", "baum"             },
 };