From: Joerg Roedel <jroe...@suse.de>
It is used to reserve the dm-regions in the iova-tree.
Signed-off-by: Joerg Roedel <jroe...@suse.de>
---
drivers/iommu/amd_iommu.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 4b8b9ee..5ea5679 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -3379,6 +3379,20 @@ static void amd_iommu_put_dm_regions(struct device *dev,
kfree(entry);
}
+static void amd_iommu_apply_dm_region(struct device *dev,
+ struct iommu_domain *domain,
+ struct iommu_dm_region *region)
+{
+ struct protection_domain *pdomain = to_pdomain(domain);
+ struct dma_ops_domain *dma_dom = pdomain->priv;
+ unsigned long start, end;
+
+ start = IOVA_PFN(region->start);
+ end = IOVA_PFN(region->start + region->length);
+
+ WARN_ON_ONCE(reserve_iova(&dma_dom->iovad, start, end) == NULL);
+}
+
static const struct iommu_ops amd_iommu_ops = {
.capable = amd_iommu_capable,
.domain_alloc = amd_iommu_domain_alloc,
@@ -3394,6 +3408,7 @@ static const struct iommu_ops amd_iommu_ops = {
.device_group = amd_iommu_device_group,
.get_dm_regions = amd_iommu_get_dm_regions,
.put_dm_regions = amd_iommu_put_dm_regions,
+ .apply_dm_region = amd_iommu_apply_dm_region,
.pgsize_bitmap = AMD_IOMMU_PGSIZES,
};
--
1.9.1
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