[Intel IOMMU][patch 5/8] Graphics driver workarounds to provide unity map

Most GFX drivers don't call standard PCI DMA APIs to allocate DMA buffer, Such drivers will be broken with IOMMU enabled. To workaround this issue, we added two options. Once graphics devices are converted over to use the DMA-API's this entire patch can be removed... a. intel_iommu=igfx_off. Wi

[Intel IOMMU][patch 5/8] Graphics driver workarounds to provide unity map

Most GFX drivers don't call standard PCI DMA APIs to allocate DMA buffer, Such drivers will be broken with IOMMU enabled. To workaround this issue, we added two options. Once graphics devices are converted over to use the DMA-API's this entire patch can be removed... a. intel_iommu=igfx_off. Wi