diff options
| author | Will Deacon <will.deacon@arm.com> | 2013-11-05 15:59:53 +0000 |
|---|---|---|
| committer | Jon Medhurst <tixy@linaro.org> | 2015-07-17 12:21:27 +0100 |
| commit | 5ddd7f3fe2a180cb0f9788778fb16a11a5957b1d (patch) | |
| tree | cbeded8cb67e70336f4950ea54ca2292fe104fbc /include/linux/iommu.h | |
| parent | b7b4cbf15158a6b726e9f0684955cc651ccacd2b (diff) | |
iommu: add IOMMU_EXEC flag for safely allowing XN mappings
Whilst most IOMMU mappings should probably be non-executable, there
may be cases (HSA?) where executable mappings are required.
This patch introduces a new mapping flag, IOMMU_EXEC, to indicate that
the mapping should be mapped as executable.
Signed-off-by: Will Deacon <will.deacon@arm.com>
(cherry picked from commit ca13bb3d4e54f5c30089e55d5b8f4bb80c8f05e2)
Signed-off-by: Jon Medhurst <tixy@linaro.org>
Diffstat (limited to 'include/linux/iommu.h')
| -rw-r--r-- | include/linux/iommu.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 3aeb7305e2f5..e8688bf6c137 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -23,9 +23,10 @@ #include <linux/err.h> #include <linux/types.h> -#define IOMMU_READ (1) -#define IOMMU_WRITE (2) -#define IOMMU_CACHE (4) /* DMA cache coherency */ +#define IOMMU_READ (1 << 0) +#define IOMMU_WRITE (1 << 1) +#define IOMMU_CACHE (1 << 2) /* DMA cache coherency */ +#define IOMMU_EXEC (1 << 3) struct iommu_ops; struct iommu_group; |