Re: [PATCH V3 09/13] DMA: Add dma_map_decrypted/dma_unmap_encrypted() function
From: Christoph Hellwig <hch@lst.de>
Date: 2021-08-12 12:27:08
Also in:
linux-hyperv, linux-iommu, linux-scsi, lkml, netdev, xen-devel
On Mon, Aug 09, 2021 at 01:56:13PM -0400, Tianyu Lan wrote:
From: Tianyu Lan <redacted> In Hyper-V Isolation VM with AMD SEV, swiotlb boucne buffer needs to be mapped into address space above vTOM and so introduce dma_map_decrypted/dma_unmap_encrypted() to map/unmap bounce buffer memory. The platform can populate man/unmap callback in the dma memory decrypted ops.
Nothing here looks actually DMA related, and the names are horribly confusing vs the actual dma_map_* calls.