[PATCH 03/16] iommu: Only allow iommu_map/unmap for paging domains
From: joro@8bytes.org (Joerg Roedel)
Date: 2015-03-26 12:43:52
Also in:
linux-iommu, linux-rockchip, linux-samsung-soc, linux-tegra, lkml
Subsystem:
iommu subsystem, the rest · Maintainers:
Joerg Roedel, Will Deacon, Linus Torvalds
From: Joerg Roedel <redacted> Check for the new __IOMMU_DOMAIN_PAGING flag before calling into the iommu drivers ->map and ->unmap call-backs. Signed-off-by: Joerg Roedel <redacted> --- drivers/iommu/iommu.c | 6 ++++++ 1 file changed, 6 insertions(+)
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);
--
1.9.1