netdev - Re: [PATCH V3 09/13] DMA: Add dma_map_decrypted/dma_unmap

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Date:   Thu, 12 Aug 2021 14:26:57 +0200
From:   Christoph Hellwig <hch@....de>
To:     Tianyu Lan <ltykernel@...il.com>
Cc:     kys@...rosoft.com, haiyangz@...rosoft.com, sthemmin@...rosoft.com,
        wei.liu@...nel.org, decui@...rosoft.com, tglx@...utronix.de,
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Subject: Re: [PATCH V3 09/13] DMA: Add
 dma_map_decrypted/dma_unmap_encrypted() function

On Mon, Aug 09, 2021 at 01:56:13PM -0400, Tianyu Lan wrote:
> From: Tianyu Lan <Tianyu.Lan@...rosoft.com>
> 
> 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.