Re: [PATCH v2 1/1] iommu/vt-d: Remove INTEL_IOMMU_BROKEN_GFX_WA

Baolu Lu
2024-02-26T06:13:25Z

On 1/30/24 2:08 PM, Lu Baolu wrote:
> 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 DAM 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>
> ---
> drivers/iommu/intel/iommu.c | 4 ----
> drivers/iommu/intel/Kconfig | 11 -----------
> 2 files changed, 15 deletions(-)

I have queued this patch for v6.9.

Best regards,
baolu