From 4b8d18c0c986877fe89ade2214e1e81ad817cef1 Mon Sep 17 00:00:00 2001 From: Lu Baolu Date: Tue, 27 Feb 2024 10:14:34 +0800 Subject: 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 Signed-off-by: Lu Baolu Reviewed-by: Kevin Tian Link: https://lore.kernel.org/r/20240130060823.57990-1-baolu.lu@linux.intel.com Signed-off-by: Joerg Roedel --- drivers/iommu/intel/iommu.c | 4 ---- 1 file changed, 4 deletions(-) (limited to 'drivers/iommu/intel/iommu.c') 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; -- cgit v1.2.3