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 /drivers/iommu/intel-iommu.c | |
| parent | 522200858093a6f31af9830672109f6d9807dd1e (diff) | |
| download | lwn-8bc1f85c02a20a59956b00b3acea12c04dce9ae8.tar.gz lwn-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 'drivers/iommu/intel-iommu.c')
| -rw-r--r-- | drivers/iommu/intel-iommu.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index c0c7820d4c46..8dc19b8f5d45 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -405,6 +405,9 @@ int dmar_disabled = 0; int dmar_disabled = 1; #endif /*CONFIG_INTEL_IOMMU_DEFAULT_ON*/ +int intel_iommu_enabled = 0; +EXPORT_SYMBOL_GPL(intel_iommu_enabled); + static int dmar_map_gfx = 1; static int dmar_forcedac; static int intel_iommu_strict; @@ -3647,6 +3650,8 @@ int __init intel_iommu_init(void) bus_register_notifier(&pci_bus_type, &device_nb); + intel_iommu_enabled = 1; + return 0; } |