Commit 5fa9e7c5 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

iommu: Print default domain type on boot 



Introduce a subsys_initcall for IOMMU code and use it to
print the default domain type at boot.

Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 74bc0f6b

drivers/iommu/iommu.c

+29 −1
Original line number Diff line number Diff line
@@ -93,12 +93,40 @@ struct iommu_group_attribute iommu_group_attr_##_name = \ 
static LIST_HEAD(iommu_device_list);

static DEFINE_SPINLOCK(iommu_device_lock);



/*

 * Use a function instead of an array here because the domain-type is a

 * bit-field, so an array would waste memory.

 */

static const char *iommu_domain_type_str(unsigned int t)

{

	switch (t) {

	case IOMMU_DOMAIN_BLOCKED:

		return "Blocked";

	case IOMMU_DOMAIN_IDENTITY:

		return "Passthrough";

	case IOMMU_DOMAIN_UNMANAGED:

		return "Unmanaged";

	case IOMMU_DOMAIN_DMA:

		return "Translated";

	default:

		return "Unknown";

	}

}



static int __init iommu_subsys_init(void)

{

	pr_info("Default domain type: %s\n",

		iommu_domain_type_str(iommu_def_domain_type));



	return 0;

}

subsys_initcall(iommu_subsys_init);



int iommu_device_register(struct iommu_device *iommu)

{

	spin_lock(&iommu_device_lock);

	list_add_tail(&iommu->list, &iommu_device_list);

	spin_unlock(&iommu_device_lock);



	return 0;

}