From: Gurchetan Singh <gurchetansingh@chromium.org>

This change enables rutabaga to receive virtio-gpu-3d hypercalls
when it is active.

Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org>
Tested-by: Alyssa Ross <hi@alyssa.is>
Tested-by: Emmanouil Pitsidianakis <manos.pitsidianakis@linaro.org>
Reviewed-by: Emmanouil Pitsidianakis <manos.pitsidianakis@linaro.org>
---
v3: Whitespace fix (Akihiko)

 hw/display/virtio-gpu-base.c | 3 ++-
 hw/display/virtio-gpu.c      | 5 +++--
 softmmu/qdev-monitor.c       | 3 +++
 softmmu/vl.c                 | 1 +
 4 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/hw/display/virtio-gpu-base.c b/hw/display/virtio-gpu-base.c
index 4f2b0ba1f3..50c5373b65 100644
--- a/hw/display/virtio-gpu-base.c
+++ b/hw/display/virtio-gpu-base.c
@@ -223,7 +223,8 @@ virtio_gpu_base_get_features(VirtIODevice *vdev, uint64_t features,
 {
     VirtIOGPUBase *g = VIRTIO_GPU_BASE(vdev);
 
-    if (virtio_gpu_virgl_enabled(g->conf)) {
+    if (virtio_gpu_virgl_enabled(g->conf) ||
+        virtio_gpu_rutabaga_enabled(g->conf)) {
         features |= (1 << VIRTIO_GPU_F_VIRGL);
     }
     if (virtio_gpu_edid_enabled(g->conf)) {
diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
index 3e658f1fef..08e170e029 100644
--- a/hw/display/virtio-gpu.c
+++ b/hw/display/virtio-gpu.c
@@ -1361,8 +1361,9 @@ void virtio_gpu_device_realize(DeviceState *qdev, Error **errp)
     VirtIOGPU *g = VIRTIO_GPU(qdev);
 
     if (virtio_gpu_blob_enabled(g->parent_obj.conf)) {
-        if (!virtio_gpu_have_udmabuf()) {
-            error_setg(errp, "cannot enable blob resources without udmabuf");
+        if (!virtio_gpu_have_udmabuf() &&
+            !virtio_gpu_rutabaga_enabled(g->parent_obj.conf)) {
+            error_setg(errp, "need udmabuf or rutabaga for blob resources");
             return;
         }
 
diff --git a/softmmu/qdev-monitor.c b/softmmu/qdev-monitor.c
index 74f4e41338..1b8005ae55 100644
--- a/softmmu/qdev-monitor.c
+++ b/softmmu/qdev-monitor.c
@@ -86,6 +86,9 @@ static const QDevAlias qdev_alias_table[] = {
     { "virtio-gpu-pci", "virtio-gpu", QEMU_ARCH_VIRTIO_PCI },
     { "virtio-gpu-gl-device", "virtio-gpu-gl", QEMU_ARCH_VIRTIO_MMIO },
     { "virtio-gpu-gl-pci", "virtio-gpu-gl", QEMU_ARCH_VIRTIO_PCI },
+    { "virtio-gpu-rutabaga-device", "virtio-gpu-rutabaga",
+      QEMU_ARCH_VIRTIO_MMIO },
+    { "virtio-gpu-rutabaga-pci", "virtio-gpu-rutabaga", QEMU_ARCH_VIRTIO_PCI },
     { "virtio-input-host-device", "virtio-input-host", QEMU_ARCH_VIRTIO_MMIO },
     { "virtio-input-host-ccw", "virtio-input-host", QEMU_ARCH_VIRTIO_CCW },
     { "virtio-input-host-pci", "virtio-input-host", QEMU_ARCH_VIRTIO_PCI },
diff --git a/softmmu/vl.c b/softmmu/vl.c
index b0b96f67fa..2f98eefdf3 100644
--- a/softmmu/vl.c
+++ b/softmmu/vl.c
@@ -216,6 +216,7 @@ static struct {
     { .driver = "ati-vga",              .flag = &default_vga       },
     { .driver = "vhost-user-vga",       .flag = &default_vga       },
     { .driver = "virtio-vga-gl",        .flag = &default_vga       },
+    { .driver = "virtio-vga-rutabaga",  .flag = &default_vga       },
 };
 
 static QemuOptsList qemu_rtc_opts = {
-- 
2.42.0.rc1.204.g551eb34607-goog

On 2023/08/17 11:23, Gurchetan Singh wrote:
> From: Gurchetan Singh <gurchetansingh@chromium.org>
> 
> This change enables rutabaga to receive virtio-gpu-3d hypercalls
> when it is active.
> 
> Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org>
> Tested-by: Alyssa Ross <hi@alyssa.is>
> Tested-by: Emmanouil Pitsidianakis <manos.pitsidianakis@linaro.org>
> Reviewed-by: Emmanouil Pitsidianakis <manos.pitsidianakis@linaro.org>
> ---
> v3: Whitespace fix (Akihiko)
> 
>   hw/display/virtio-gpu-base.c | 3 ++-
>   hw/display/virtio-gpu.c      | 5 +++--
>   softmmu/qdev-monitor.c       | 3 +++
>   softmmu/vl.c                 | 1 +
>   4 files changed, 9 insertions(+), 3 deletions(-)
> 
> diff --git a/hw/display/virtio-gpu-base.c b/hw/display/virtio-gpu-base.c
> index 4f2b0ba1f3..50c5373b65 100644
> --- a/hw/display/virtio-gpu-base.c
> +++ b/hw/display/virtio-gpu-base.c
> @@ -223,7 +223,8 @@ virtio_gpu_base_get_features(VirtIODevice *vdev, uint64_t features,
>   {
>       VirtIOGPUBase *g = VIRTIO_GPU_BASE(vdev);
>   
> -    if (virtio_gpu_virgl_enabled(g->conf)) {
> +    if (virtio_gpu_virgl_enabled(g->conf) ||
> +        virtio_gpu_rutabaga_enabled(g->conf)) {
>           features |= (1 << VIRTIO_GPU_F_VIRGL);
>       }
>       if (virtio_gpu_edid_enabled(g->conf)) {
> diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
> index 3e658f1fef..08e170e029 100644
> --- a/hw/display/virtio-gpu.c
> +++ b/hw/display/virtio-gpu.c
> @@ -1361,8 +1361,9 @@ void virtio_gpu_device_realize(DeviceState *qdev, Error **errp)
>       VirtIOGPU *g = VIRTIO_GPU(qdev);
>   
>       if (virtio_gpu_blob_enabled(g->parent_obj.conf)) {
> -        if (!virtio_gpu_have_udmabuf()) {
> -            error_setg(errp, "cannot enable blob resources without udmabuf");
> +        if (!virtio_gpu_have_udmabuf() &&

virtio_gpu_have_udmabuf() emits a warning if udmabuf is not available, 
which is spurious when using Rutabaga.

I think virtio_gpu_have_udmabuf() should be renamed to 
virtio_gpu_init_udmabuf() or something, let it set errp instead of 
emitting a warning, and call it only when Rutabaga is not in use. That 
clarifies the timing when an error message will be shown.