Re: [PATCH 0/3] Fix virtio-blk issue with SWIOTLB

[Jason Wang]

On 2019/1/11 äå5:15, Joerg Roedel wrote:
> On Fri, Jan 11, 2019 at 11:29:31AM +0800, Jason Wang wrote:
> > Just wonder if my understanding is correct IOMMU_PLATFORM must be set for
> > all virtio devices under AMD-SEV guests?
> Yes, that is correct. Emulated DMA can only happen on the SWIOTLB
> aperture, because that memory is not encrypted. The guest bounces the
> data then to its encrypted memory.
>
> Regards,
>
> 	Joerg


Thanks, have you tested vhost-net in this case. I suspect it may not work