[PATCH v6 15/25] iommufd/selftest: Make the mock iommu driver into a real driver

[Baolu Lu]

On 2023/8/3 8:08, Jason Gunthorpe wrote:
> +/*
> + * Register an iommu driver against a single bus. This is only used by iommufd
> + * selftest to create a mock iommu driver. The caller must provide
> + * some memory to hold a notifier_block.
> + */
> +int iommu_device_register_bus(struct iommu_device *iommu,
> +			      const struct iommu_ops *ops, struct bus_type *bus,
> +			      struct notifier_block *nb)
> +{
> +	int err;
> +
> +	iommu->ops = ops;
> +	nb->notifier_call = iommu_bus_notifier;
> +	err = bus_register_notifier(bus, nb);
> +	if (err)
> +		return err;
> +
> +	spin_lock(&iommu_device_lock);
> +	list_add_tail(&iommu->list, &iommu_device_list);
> +	spin_unlock(&iommu_device_lock);
> +
> +	bus->iommu_ops = ops;
> +	err = bus_iommu_probe(bus);

By the way, bus_iommu_probe() has been changed in iommu-next, so it
needs to be rebased here.

Best regards,
baolu