Messages in this thread | ![/](/images/icornerl.gif) | | Date | Thu, 4 Feb 2021 09:40:23 +0100 | From | Christoph Hellwig <> | Subject | Re: [PATCH RFC v1 5/6] xen-swiotlb: convert variables to arrays |
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So one thing that has been on my mind for a while: I'd really like to kill the separate dma ops in Xen swiotlb. If we compare xen-swiotlb to swiotlb the main difference seems to be:
- additional reasons to bounce I/O vs the plain DMA capable - the possibility to do a hypercall on arm/arm64 - an extra translation layer before doing the phys_to_dma and vice versa - an special memory allocator
I wonder if inbetween a few jump labels or other no overhead enablement options and possibly better use of the dma_range_map we could kill off most of swiotlb-xen instead of maintaining all this code duplication?
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