Commit c52c72d3 authored by Olof Johansson's avatar Olof Johansson Committed by Joerg Roedel
Browse files

iommu: Add sysfs attribyte for domain type 



While we could print it at setup time, this is an easier way to match
each device to their default IOMMU allocation type.

Signed-off-by: default avatarOlof Johansson <olof@lixom.net>
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 7d0f5fd3

drivers/iommu/iommu.c

+32 −0
Original line number Diff line number Diff line
@@ -294,11 +294,39 @@ static ssize_t iommu_group_show_resv_regions(struct iommu_group *group, 
	return (str - buf);

}



static ssize_t iommu_group_show_type(struct iommu_group *group,

				     char *buf)

{

	char *type = "unknown\n";



	if (group->default_domain) {

		switch (group->default_domain->type) {

		case IOMMU_DOMAIN_BLOCKED:

			type = "blocked\n";

			break;

		case IOMMU_DOMAIN_IDENTITY:

			type = "identity\n";

			break;

		case IOMMU_DOMAIN_UNMANAGED:

			type = "unmanaged\n";

			break;

		case IOMMU_DOMAIN_DMA:

			type = "DMA";

			break;

		}

	}

	strcpy(buf, type);



	return strlen(type);

}



static IOMMU_GROUP_ATTR(name, S_IRUGO, iommu_group_show_name, NULL);



static IOMMU_GROUP_ATTR(reserved_regions, 0444,

			iommu_group_show_resv_regions, NULL);



static IOMMU_GROUP_ATTR(type, 0444, iommu_group_show_type, NULL);



static void iommu_group_release(struct kobject *kobj)

{

	struct iommu_group *group = to_iommu_group(kobj);
@@ -380,6 +408,10 @@ struct iommu_group *iommu_group_alloc(void) 
	if (ret)

		return ERR_PTR(ret);



	ret = iommu_group_create_file(group, &iommu_group_attr_type);

	if (ret)

		return ERR_PTR(ret);



	pr_debug("Allocated group %d\n", group->id);



	return group;