Re: [PATCH v2 2/6] iommufd/hw_pagetable: Use domain_alloc_user op for domain allocation

[Nicolin Chen <nicolinc@xxxxxxxxxx>]

On Mon, Oct 16, 2023 at 04:16:05PM +0800, Liu, Jingqi wrote:
 
> @@ -88,10 +90,19 @@ iommufd_hw_pagetable_alloc(struct iommufd_ctx *ictx, struct iommufd_ioas *ioas,
>        refcount_inc(&ioas->obj.users);
>        hwpt->ioas = ioas;
> 
> -       hwpt->domain = iommu_domain_alloc(idev->dev->bus);
> -       if (!hwpt->domain) {
> -               rc = -ENOMEM;
> -               goto out_abort;
> +       if (ops->domain_alloc_user) {
> +               hwpt->domain = ops->domain_alloc_user(idev->dev, 0);
> 
> Seems a "flags" parameter needs to be passed to 'domain_alloc_user()'.
> Like this:
>         hwpt->domain = ops->domain_alloc_user(idev->dev, flags);

There's no "flags" parameter until the following PATCH-3:
https://lore.kernel.org/linux-iommu/20230928071528.26258-4-yi.l.liu@xxxxxxxxx/

Thanks
Nicolin