RE: [PATCH 1/1] iommu/vt-d: Add set_dev_pasid callbacks for default domain

[Tian, Kevin]

> From: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
> Sent: Tuesday, June 14, 2022 11:44 AM
> 
> This allows the upper layers to set a domain to a PASID of a device
> if the PASID feature is supported by the IOMMU hardware. The typical
> use cases are, for example, kernel DMA with PASID and hardware
> assisted mediated device drivers.
> 

why is it not part of the series for those use cases? There is no consumer
of added callbacks in this patch...

> +/* PCI domain-subdevice relationship */
> +struct subdev_domain_info {
> +	struct list_head link_domain;	/* link to domain siblings */
> +	struct device *dev;		/* physical device derived from */
> +	ioasid_t pasid;			/* PASID on physical device */
> +};
> +

It's not subdev. Just dev+pasid in iommu's context.