On Wed, Feb 17, 2021 at 04:55:12PM -0300, lagar...@linux.ibm.com wrote:
> diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c
> index 2fdd5daf74..6ab760364b 100644
> --- a/hw/virtio/vhost-user.c
> +++ b/hw/virtio/vhost-user.c
> @@ -1849,6 +1849,13 @@ static int vhost_user_backend_init(struct vhost_dev
> *dev, void *opaque)
> }
> }
>
> + if ((dev->vdev != NULL) &&
> + virtio_host_has_feature(dev->vdev, VIRTIO_F_IOMMU_PLATFORM) &&
> + !(features & (1ULL << VIRTIO_F_IOMMU_PLATFORM))) {
> + error_report("IOMMU is currently not supported with vhost-user");
I think IOMMU *is* supported by vhost-user. It's just that specific
vhost-user backends might not implement it.
This error message can be made more specific:
error_report("IOMMU is not supported by the connected vhost-user backend");
Stefan
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