http://pages.cs.wisc.edu/~basu/isca_iommu_tutorial/index.htm
http://www.infradead.org/~mchehab/kernel_docs/unsorted/Intel-IOMMU.html
http://pages.cs.wisc.edu/~basu/isca_iommu_tutorial/index.htm
http://www.infradead.org/~mchehab/kernel_docs/unsorted/Intel-IOMMU.html
原文：https://www.cnblogs.com/Daisy123/p/8616086.html