diff options
| author | Eugeni Dodonov <eugeni.dodonov@intel.com> | 2011-11-23 16:42:14 -0200 |
|---|---|---|
| committer | Hiroshi DOYU <hdoyu@nvidia.com> | 2012-01-23 11:11:42 +0200 |
| commit | 27a53c2ecf401d7ed540abe081d15dc76aeaad4e (patch) | |
| tree | d0a2210f57eba82d94eb16656e11daac74875d4c /drivers/iommu | |
| parent | 4bd432a08e242b1ae65cdb6b3d3b336e7d29ff63 (diff) | |
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')
| -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 7a02a8e1cd82..77e3b917c8da 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -423,6 +423,9 @@ 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; @@ -3665,6 +3668,8 @@ int __init intel_iommu_init(void) bus_register_notifier(&pci_bus_type, &device_nb); + intel_iommu_enabled = 1; + return 0; } |