RE: [PATCH v4 04/11] iommufd/viommu: Add IOMMU_VIOMMU_ALLOC ioctl

[Tian, Kevin]

> From: Nicolin Chen <nicolinc@xxxxxxxxxx>
> Sent: Tuesday, October 22, 2024 8:19 AM
> +
> +	viommu->type = cmd->type;
> +	viommu->ictx = ucmd->ictx;
> +	viommu->hwpt = hwpt_paging;
> +	/* Assume physical IOMMUs are unpluggable (the most likely case)
> */
> +	viommu->iommu_dev = __iommu_get_iommu_dev(idev->dev);
> +

so what would happen if this assumption breaks?