Re: [RFC V2 PATCH 9/12] swiotlb: Add bounce buffer remap address setting function

[Christoph Hellwig]

On Tue, Apr 13, 2021 at 11:22:14AM -0400, Tianyu Lan wrote:
> From: Tianyu Lan <Tianyu.Lan@xxxxxxxxxxxxx>
> 
> For Hyper-V isolation VM with AMD SEV SNP, the bounce buffer(shared memory)
> needs to be accessed via extra address space(e.g address above bit39).
> Hyper-V code may remap extra address space outside of swiotlb. swiotlb_bounce()
> needs to use remap virtual address to copy data from/to bounce buffer. Add
> new interface swiotlb_set_bounce_remap() to do that.

I have no way to review what this actually doing when you only Cc me
on a single patch.  Please make sure everyone is Cced on the whole
series to enable proper review.