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Commit 5fa9e7c5 authored by Joerg Roedel's avatar Joerg Roedel
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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
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+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;
}