# Re: \[PATCH V3 10/13\] x86/Swiotlb: Add Swiotlb bounce buffer remap function for HV IVM

- From: Christoph Hellwig \<hch@lst.de\>
- Date: 2021-08-12 12:27:47 
- List: linux-hyperv
- Page: https://ratatoskr.run/linux-hyperv/2021/08/1476056
- Thread: https://ratatoskr.run/xen-devel/2021/08/1472230/t.md

```text
This is still broken.  You need to make sure the actual DMA allocations
do have struct page backing.
```