drm/virtio: Expose allow_p2p capability to user space

Signed-off-by: Weifeng Liu <[email protected]>
projectceladon · Sep 5, 2024 · 98bf16d · 98bf16d
1 parent 5c59b2c
commit 98bf16d
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Showing 2 changed files with 4 additions and 0 deletions.
diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
@@ -110,6 +110,9 @@ static int virtio_gpu_getparam_ioctl(struct drm_device *dev, void *data,
 	case VIRTGPU_PARAM_QUERY_DEV:
 		value = (strcmp(dev->dev->driver->name, "virtio-pci") == 0) ? 1 : 0;
 		break;
+	case VIRTGPU_PARAM_ALLOW_P2P:
+		value = vgdev->has_allow_p2p ? 1 : 0;
+		break;
 	default:
 		return -EINVAL;
 	}

diff --git a/include/uapi/drm/virtgpu_drm.h b/include/uapi/drm/virtgpu_drm.h
@@ -84,6 +84,7 @@ struct drm_virtgpu_execbuffer {
 #define VIRTGPU_PARAM_CONTEXT_INIT 6 /* DRM_VIRTGPU_CONTEXT_INIT */
 #define VIRTGPU_PARAM_SUPPORTED_CAPSET_IDs 7 /* Bitmask of supported capability set ids */
 #define VIRTGPU_PARAM_QUERY_DEV 11 /* Query the virtio device name. */
+#define VIRTGPU_PARAM_ALLOW_P2P 12 /* do we accept local memory addresses */
 
 struct drm_virtgpu_getparam {
 	__u64 param;