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: Olof Johansson <olof@lixom.net>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index d227b86..7f50013b 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -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;