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| author | Lu Baolu <baolu.lu@linux.intel.com> | 2024-02-27 05:14:34 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2024-03-01 15:51:17 +0300 |
| commit | 4b8d18c0c986877fe89ade2214e1e81ad817cef1 (patch) | |
| tree | 9e1c7c602b404edf96bf0c71fd7de5e24fb998be /drivers/iommu/intel/iommu.c | |
| parent | 54be6c6c5ae8e0d93a6c4641cb7528eb0b6ba478 (diff) | |
| download | linux-4b8d18c0c986877fe89ade2214e1e81ad817cef1.tar.xz | |
iommu/vt-d: Remove INTEL_IOMMU_BROKEN_GFX_WA
Commit 62edf5dc4a524 ("intel-iommu: Restore DMAR_BROKEN_GFX_WA option for
broken graphics drivers") was introduced 24 years ago as a temporary
workaround for graphics drivers that used physical addresses for DMA and
avoided DMA APIs. This workaround was disabled by default.
As 24 years have passed, it is expected that graphics driver developers
have migrated their drivers to use kernel DMA APIs. Therefore, this
workaround is no longer required and could been removed.
The Intel iommu driver also provides a "igfx_off" option to turn off
the DMA translation for the graphic dedicated IOMMU. Hence, there is
really no good reason to keep this config option.
Suggested-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20240130060823.57990-1-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/intel/iommu.c')
| -rw-r--r-- | drivers/iommu/intel/iommu.c | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index 6fb5f6fceea1..fc52fcd786aa 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -2660,10 +2660,6 @@ static int __init init_dmars(void) iommu_set_root_entry(iommu); } -#ifdef CONFIG_INTEL_IOMMU_BROKEN_GFX_WA - dmar_map_gfx = 0; -#endif - if (!dmar_map_gfx) iommu_identity_mapping |= IDENTMAP_GFX; |