[PATCH v4 5/9] iommu/vt-d: Don't switch off swiotlb if use direct dma

Lu Baolu
2019-06-03T01:24:00Z

The direct dma implementation depends on swiotlb. Hence, don't
switch of swiotlb since direct dma interfaces are used in this
driver.

Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Kevin Tian <kevin.tian@intel.com>
Cc: Mika Westerberg <mika.westerberg@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
---
drivers/iommu/intel-iommu.c | 6 ------
1 file changed, 6 deletions(-)

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index d5a6c8064c56..235837c50719 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -4625,9 +4625,6 @@ static int __init platform_optin_force_iommu(void)
iommu_identity_mapping |= IDENTMAP_ALL;

dmar_disabled = 0;
-#if defined(CONFIG_X86) && defined(CONFIG_SWIOTLB)
- swiotlb = 0;
-#endif
no_iommu = 0;

return 1;
@@ -4765,9 +4762,6 @@ int __init intel_iommu_init(void)
}
up_write(&dmar_global_lock);

-#if defined(CONFIG_X86) && defined(CONFIG_SWIOTLB)
- swiotlb = 0;
-#endif
dma_ops = &intel_dma_ops;

init_iommu_pm_ops();
--
2.17.1