hw/display/virtio-gpu: Initialize blob mapping for ATTACH_BACKING

[PATCH] hw/display/virtio-gpu: Initialize blob mapping for ATTACH_BACKING

Akihiko Odaki posted 1 patch 1 day, 2 hours ago

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git fetch https://github.com/patchew-project/qemu tags/patchew/20260725-backing-v1-1-5b584bf7df5a@rsg.ci.i.u-tokyo.ac.jp

Maintainers: "Alex Bennée" <alex.bennee@linaro.org>, Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>, Dmitry Osipenko <dmitry.osipenko@collabora.com>, "Michael S. Tsirkin" <mst@redhat.com>

hw/display/virtio-gpu.c | 4 ++++
1 file changed, 4 insertions(+)

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[PATCH] hw/display/virtio-gpu: Initialize blob mapping for ATTACH_BACKING

Posted by Akihiko Odaki 1 day, 2 hours ago

It is necessary for blob cursor and scanout.

Fixes: e0933d91b1cd ("virtio-gpu: Add virtio_gpu_resource_create_blob")
Signed-off-by: Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>
---
 hw/display/virtio-gpu.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
index 718ba3039290..e886298ec42f 100644
--- a/hw/display/virtio-gpu.c
+++ b/hw/display/virtio-gpu.c
@@ -984,6 +984,10 @@ virtio_gpu_resource_attach_backing(VirtIOGPU *g,
         cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
         return;
     }
+
+    if (!res->image) {
+        virtio_gpu_init_udmabuf(res);
+    }
 }
 
 static void

---
base-commit: 006a22cb26998998385b104db1ff9466ef2f3153
change-id: 20260725-backing-db0e69515455

Best regards,
--  
Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>

Re: [PATCH] hw/display/virtio-gpu: Initialize blob mapping for ATTACH_BACKING

Posted by Marc-André Lureau 20 hours ago

On Sat, Jul 25, 2026 at 11:13 AM Akihiko Odaki
<odaki@rsg.ci.i.u-tokyo.ac.jp> wrote:
>
> It is necessary for blob cursor and scanout.
>
> Fixes: e0933d91b1cd ("virtio-gpu: Add virtio_gpu_resource_create_blob")
> Signed-off-by: Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>

> ---
>  hw/display/virtio-gpu.c | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
> index 718ba3039290..e886298ec42f 100644
> --- a/hw/display/virtio-gpu.c
> +++ b/hw/display/virtio-gpu.c
> @@ -984,6 +984,10 @@ virtio_gpu_resource_attach_backing(VirtIOGPU *g,
>          cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
>          return;
>      }
> +
> +    if (!res->image) {
> +        virtio_gpu_init_udmabuf(res);
> +    }
>  }
>
>  static void
>
> ---
> base-commit: 006a22cb26998998385b104db1ff9466ef2f3153
> change-id: 20260725-backing-db0e69515455
>
> Best regards,
> --
> Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>
>
>


-- 
Marc-André Lureau