RE: [PATCH V5 10/12] hyperv/IOMMU: Enable swiotlb bounce buffer for Isolation VM

From: Tianyu Lan Sent: Tuesday, September 14, 2021 6:39 AM > > hyperv Isolation VM requires bounce buffer support to copy > data from/to encrypted memory and so enable swiotlb force > mode to use swiotlb bounce buffer for DMA transaction. > > In Isolation VM with AMD SEV, the bounce buffer needs

[PATCH V5 10/12] hyperv/IOMMU: Enable swiotlb bounce buffer for Isolation VM

From: Tianyu Lan hyperv Isolation VM requires bounce buffer support to copy data from/to encrypted memory and so enable swiotlb force mode to use swiotlb bounce buffer for DMA transaction. In Isolation VM with AMD SEV, the bounce buffer needs to be accessed via extra address space which is above