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authorJoerg Roedel <jroedel@suse.de>2015-05-28 18:41:33 +0200
committerJoerg Roedel <jroedel@suse.de>2015-06-09 08:55:23 +0200
commita1015c2b99b94cf521603b41debf167114031456 (patch)
tree9d088f6fd69a45acd0d5c40031845561f6d06064 /drivers/iommu
parent2c1296d92ac0367364bcb73a43c12a0bdfbfee75 (diff)
downloadop-kernel-dev-a1015c2b99b94cf521603b41debf167114031456.zip
op-kernel-dev-a1015c2b99b94cf521603b41debf167114031456.tar.gz
iommu: Introduce direct mapped region handling
Add two new functions to the IOMMU-API to allow the IOMMU drivers to export the requirements for direct mapped regions per device. This is useful for exporting the information in Intel VT-d's RMRR entries or AMD-Vi's unity mappings. Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/iommu.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index a0a38bd..6b8d6e7 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -1469,3 +1469,19 @@ int iommu_domain_set_attr(struct iommu_domain *domain,
return ret;
}
EXPORT_SYMBOL_GPL(iommu_domain_set_attr);
+
+void iommu_get_dm_regions(struct device *dev, struct list_head *list)
+{
+ const struct iommu_ops *ops = dev->bus->iommu_ops;
+
+ if (ops && ops->get_dm_regions)
+ ops->get_dm_regions(dev, list);
+}
+
+void iommu_put_dm_regions(struct device *dev, struct list_head *list)
+{
+ const struct iommu_ops *ops = dev->bus->iommu_ops;
+
+ if (ops && ops->put_dm_regions)
+ ops->put_dm_regions(dev, list);
+}
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