diff mbox

[03/16] iommu: Only allow iommu_map/unmap for paging domains

Message ID 1427373799-18662-4-git-send-email-joro@8bytes.org (mailing list archive)
State New, archived
Headers show

Commit Message

Joerg Roedel March 26, 2015, 12:43 p.m. UTC 
From: Joerg Roedel <jroedel@suse.de>

Check for the new __IOMMU_DOMAIN_PAGING flag before calling
into the iommu drivers ->map and ->unmap call-backs.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
 drivers/iommu/iommu.c | 6 ++++++
 1 file changed, 6 insertions(+)
diff mbox

Patch

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 4920605..656b949 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -1063,6 +1063,9 @@  int iommu_map(struct iommu_domain *domain, unsigned long iova,
 		     domain->ops->pgsize_bitmap == 0UL))
 		return -ENODEV;
 
+	if (unlikely(!(domain->type & __IOMMU_DOMAIN_PAGING)))
+		return -EINVAL;
+
 	/* find out the minimum page size supported */
 	min_pagesz = 1 << __ffs(domain->ops->pgsize_bitmap);
 
@@ -1114,6 +1117,9 @@  size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova, size_t size)
 		     domain->ops->pgsize_bitmap == 0UL))
 		return -ENODEV;
 
+	if (unlikely(!(domain->type & __IOMMU_DOMAIN_PAGING)))
+		return -EINVAL;
+
 	/* find out the minimum page size supported */
 	min_pagesz = 1 << __ffs(domain->ops->pgsize_bitmap);