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iommu: Introduce iommu_request_dm_for_dev()

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This function can be called by an IOMMU driver to request
that a device's default domain is direct mapped.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Joerg Roedel
2015-05-28 18:41:36 +02:00
parent 6827ca8369
commit d290f1e70d
2 changed files with 59 additions and 0 deletions
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6
include/linux/iommu.h
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@@ -225,6 +225,7 @@ extern void iommu_set_fault_handler(struct iommu_domain *domain,
extern void iommu_get_dm_regions(struct device *dev, struct list_head *list);
extern void iommu_put_dm_regions(struct device *dev, struct list_head *list);
extern int iommu_request_dm_for_dev(struct device *dev);
extern int iommu_attach_group(struct iommu_domain *domain,
struct iommu_group *group);
@@ -411,6 +412,11 @@ static inline void iommu_put_dm_regions(struct device *dev,
{
}
static inline int iommu_request_dm_for_dev(struct device *dev)
{
return -ENODEV;
}
static inline int iommu_attach_group(struct iommu_domain *domain,
struct iommu_group *group)
{