diff options
| author | Eugeni Dodonov <eugeni.dodonov@intel.com> | 2011-11-23 16:42:14 -0200 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2011-12-16 08:49:57 -0800 |
| commit | 8bc1f85c02a20a59956b00b3acea12c04dce9ae8 (patch) | |
| tree | 259cc3a7b192afbde9c4b2bf066f0e1a3e4b3999 /include/linux/dma_remapping.h | |
| parent | 522200858093a6f31af9830672109f6d9807dd1e (diff) | |
| download | linux-8bc1f85c02a20a59956b00b3acea12c04dce9ae8.tar.gz linux-8bc1f85c02a20a59956b00b3acea12c04dce9ae8.tar.bz2 linux-8bc1f85c02a20a59956b00b3acea12c04dce9ae8.zip | |
iommu: Export intel_iommu_enabled to signal when iommu is in use
In i915 driver, we do not enable either rc6 or semaphores on SNB when dmar
is enabled. The new 'intel_iommu_enabled' variable signals when the
iommu code is in operation.
Cc: Ted Phelps <phelps@gnusto.com>
Cc: Peter <pab1612@gmail.com>
Cc: Lukas Hejtmanek <xhejtman@fi.muni.cz>
Cc: Andrew Lutomirski <luto@mit.edu>
CC: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Eugeni Dodonov <eugeni.dodonov@intel.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
Diffstat (limited to 'include/linux/dma_remapping.h')
| -rw-r--r-- | include/linux/dma_remapping.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/dma_remapping.h b/include/linux/dma_remapping.h index ef90cbd8e173..57c9a8ae4f2d 100644 --- a/include/linux/dma_remapping.h +++ b/include/linux/dma_remapping.h @@ -31,6 +31,7 @@ extern void free_dmar_iommu(struct intel_iommu *iommu); extern int iommu_calculate_agaw(struct intel_iommu *iommu); extern int iommu_calculate_max_sagaw(struct intel_iommu *iommu); extern int dmar_disabled; +extern int intel_iommu_enabled; #else static inline int iommu_calculate_agaw(struct intel_iommu *iommu) { @@ -44,6 +45,7 @@ static inline void free_dmar_iommu(struct intel_iommu *iommu) { } #define dmar_disabled (1) +#define intel_iommu_enabled (0) #endif |