RE: [PATCH V4 11/13] hyperv/IOMMU: Enable swiotlb bounce buffer for Isolation VM

2021-09-01 Thread Michael Kelley
From: Tianyu Lan Sent: Friday, August 27, 2021 10:21 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 to

[PATCH V4 11/13] hyperv/IOMMU: Enable swiotlb bounce buffer for Isolation VM

2021-08-27 Thread Tianyu Lan
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