On 21/02/18 22:59, Jordan Crouse wrote:
[...]> +static int install_pasid_cb(int pasid, u64 ttbr, u32 asid, void *data)
> +{
> + struct pasid_entry *entry = kzalloc(sizeof(*entry), GFP_KERNEL);
> +
> + if (!entry)
> + return -ENOMEM;
> +
> + entry->pasid = pasid;
> +
The IOMMU core can support creating multiple pagetables
for a specific domai and making them available to a client
driver that has the means to manage the pagetable itself.
PASIDs are unique indexes to a software created pagetable with
the same format and characteristics as the parent IOMMU
