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SubjectRe: AMD SME encrpytion and PCI BAR pages to user space
On Wed, Oct 21, 2020 at 01:03:22PM -0300, Jason Gunthorpe wrote:
> Oh, interesting.. Yes the issue is no userspace DMA stuff uses the DMA
> API correctly (because it is in userspace)
>
> So SWIOTLB tricks don't work, I wish the dma_map could fail for these
> situations

Userspace DMA by definition also does not use dma_map..

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